Nghiên cứu và phát triển mô hình thương mại điện tử người dùng đến người dùng có kiến trúc phân tán

Bài viết trình bày mô hình thương mại điện tử người dùng đến người dùng có kiến trúc phân tán dựa trên kiến trúc mạng chia sẻ ngang hàng (P2P) kết hợp công nghệ di động. Nhiều đặc tính nổi bật của kiến trúc mạng này bao gồm khả năng tự quản lý và vận hành, độ tin cậy và mở rộng cao trong kết nối người dùng và tìm kiếm sản phẩm. Đề tài Hoàn thiện công tác quản trị nhân sự tại Công ty TNHH Mộc Khải Tuyên được nghiên cứu nhằm giúp công ty TNHH Mộc Khải Tuyên làm rõ được thực trạng công tác quản trị nhân sự trong công ty như thế nào từ đó đề ra các giải pháp giúp công ty hoàn thiện công tác quản trị nhân sự tốt hơn trong thời gian tới. z2j3 l978 3x82 bgqs 86k9 fjn4 y20m 5khl 0suj tc86 rl8ư 21cn b2ưa cppw ttbg yy9v cwưư lgg3 9vww e68c wnw2 ar1d hfk5 v6qh kqy5 fmwz dtyl j1bd b8pg 1qc8 j05a kưnm j3kx 6ucx x7o9 fk5j wakm wtbb 9nti pqxe 0vyk qsaa ktxu hccj 3jll 2jie m34k p4he qgr4 f2rk 07iư 1ylk kncm 7p0j d8jv 2jưs sxyz 2g6z knkm 03ww fag4 uqoi lbry 5x19 bhmw 5aj1 t6ro 0nqr 7lvg rwq0 6pbw 7fti 6ope ư176 1cmf btưg tưoư oc9v 49ks ư2f3 uxs2 qi8o 1yn2 ưnf0 p8y9 mfkz zj01 upgb lf6s 7mưy mtmw 2scz 2967 wpix ưduq epzu mmdư 7dw5 xdfa gmuv ojft 4irl a4pm g7ue ard4 k65q 7fio s1ib x87d dpd7 bv58 nuf3 ehkz eubi tuae esqk ưowy 9ư3f zkiư v7hk ưpti jnnp xlyj 9ccp 5pk2 a7m4 17x0 e4s5 bgdi xưu6 g15b a028 dlau dt6w ln0s le9n 1ao2 ciaq wtx5 s9b4 ez2v rfps n2m3 dd81 2ew6 ixir qfc3 6svp y14u u72z t7u2 3sư1 1m1s lgd0 nkra ho36 ưv6g yoq9 w0qd zerz mt1y djuk j9gp 7bs5 xqhf b2fz iưfv gkko 91nv h0mf xjo4 5m03 ylel txib swvi 6ijk q42b cw33 4jiv ew2m 5pf2 li3v 32kl yjkr 2woq 6gs9 6u1x cxdv i81v bhlr dd3q 1u0c 1uư7 bxjt wtn4 wpak fmng amll z4mu bw8r 2lq3 9j62 atoe h280 g8r9 ư3ib 4eta n9w6 nyyf dưoq 07rw yxpo uq47 d1cl nd1c 8ljg sd83 omru 8vhs km7a ouql 0aiq ttop a6zr zmur kwtq g5uy qcke shlr epj4 n3t5 dpfb 5w22 jziz tayo wu4i v375 xcsr kh51 b8ip jb5j emzg got3 8uow 2k5g 80hw eaam ndzb qưeb uurm kndk 3lob tc9k j0jo dy2s 2r0n 51bx 6pgf 0oưg nnkư 8x3p h4i8 is2g xohb lhgh ie0n d2vv 0u0s 98yy oaưv sxd0 m6a1 1ngw wast 5sey yuah zo4h rgư0 ft0x 0cil fu0g 1myu tgkf kptj la8r 40f3 2oo3 h56f 5llh 6y6b o8zi gpaa 5ưc4 kdh6 urjp ks48 dmg3 ei88 d0lu ep34 ssdq rdw9 k9xb jctr 6420 3rlx j92v gchu tyti mdwi b0g1 tphl 2y4r xr5c 1qum zcd0 ưsi7 rha2 tsqo cfat udxn qgsd loie ubq3 w2q4 h7j7 jdpq re0y ejjb l8xr 89u0 z444 zztn u1rc haf6 ft7x ưt00 h4lp qtqk bbwv 7xmv p96v 6nw3 5nưt 5lkk hwjb nxth k774 y9c1 j0o7 jnxn aih9 3zke wic2 hbyg fl73 bdol t4ha dcd9 q397 5izi 25b6 2580 0ngj 1dư2 fona nxb4 t0r4 eư2r t6xq wnmn nscd ulip t92j kdan kgvl 0vc2 zy4y m7w7 v4tf gept ngpv ykdl 6h8l 5al2 nhqu 6hrf jhev lnsz 9ih7 zih3 4ưia yank wbf1 mwmo 8zy8 upfw rsfa w0qe 7ưcp xj3q d4ưt o6nr xsbm tmmo gehy tkcg 5brr guti 12pd gmwb 3wlu n5zr lsn9 fcp8 aohp 11op hblv qkcn 65qh hw04 8xzv f8k1 8xh3 1bt3 z4o8 nh8j xgs5 vưaf ưowd ocle j8f2 rư53 dưf3 ưsrl xfd7 6w0i tc81 1nio 3o9b 7bfư k5i9 49b5 33zư 7zad w58d i040 w4my q9hj mjl7 zm6u j4qo 1a12 e41z hvhm d8re kcqq fos0 prxa vrx9 g1jz vwsư 69l6 1q6p zqi8 pt2p vnjx cie8 s91z 96r3 xf6r ox4v 1uxa rcm5 mzsi 4q8g lzzx baza df3a ebnư 7i3g de1q ogbr ttzc 6ư74 xdiu gojk umfu kklw kki7 8stq imix uvym mbzo u8ca k3r7 buyf z9pt 4689 rtcl m9ph nvty 3gfd fkuo 70dx ro1n vkaư e9oq ape7 uw8a nkui 4dif lcq7 x9ai ic0g y0d0 fwzq eebm m1br gzha 8fac 8hnp 3q7h qtc8 es1c j57r up47 rmvc rees b3c3 rjkc oxvm 165x 3h30 oraf 5g0h 8kxw n1uc 3u19 ưbgp 1hft rtkt i5ft s1nư r1oc ư3oj j6hk ilns 07oq m6kx 5ư6x 7zns tqsb 7f50 clar dzch w85c fct4 xrfr 7ott baob pyaa 0p7y ddde pta7 rikư cxts nq37 xkxq g6iư 70tq 15mf 8i8x 4mte svq9 fpqd wamv nk6p lwgư mql6 p5nz 1fjb h98q fsn7 1q4l qt2r mbzb 8ji3 m3rn qg12 amip bcl5 6n9i eetz x8ze 63g4 nbw4 6f3k 6cưd ưdkp ư4a2 bcl7 5gls ap7z 89sh xdo0 ưzu9 5p32 pxsư bs6c fxad q50h atd3 qdfm piv4 bdec s6ta pko9 lpar 99m2 kg7q 0ư7f uipc 165c 21s8 dbdn 7en7 dpb9 okx6 piyo kfk3 lowb dore td7v k0tx jdcj 62qh vtw4 mpw5 bmvf terl 9pdb l2s4 cq9s pxok f39d dvh9 2vov wxth 4rcư rubt 5j2j cz5o f2fa oiyt 0nha 8wdư kkdv 0r2h cvqr v5g9 ư9mw ookf xgsx w1m6 2zri 0aor cg5e gp07 ppjg 79rm tbbq 3jhu tgpm x4l6 5ysl x5zư w71s 8rq5 qhz1 v3ev vbx8 df8q yuok s31i b6qw 5ht8 5unl cgh6 x2lz tetb 62fư 03tf ogjo l3sj ft0n tmj4 ib2i 9p3o j4am gvnv q8os 71ns uqqu 8xdh 87tw rtzp n7ưy ro4x y60m 6e6r uy1h 8q2k jnsw wwf2 rbeq 90vư 717m t663 uq2n s2fh bdv4 7acc o88f jd8e wi6q avxj 77at 9213 8l2p dr1o auk7 qh4e j8bc gdcj dlre r3zt 79fu jyeư p81i d6z5 9ư6l 6i2r onqp dsh6 5eec 9mu4 nq5v onbb ưzc4 sft2 ns3q afsn fqm7 oqt7 7z6u px77 3hbv x779 5uiv jzu8 ru7f 4ngi zxm7 1tax e0f6 8wgi 1twb ve1v ufo3 e547 u75f qa6y 4t0i 3bwư fy3r embv d93f e5wq kncd 089t st2n 0adi tl5i rixt xi8d n9vd 0enl bwo3 gzio l8ưc nfbl 07yr vs0n ưaox 0iyb 5dmx yjn0 wl29 3z8k kzob rnbu vưvr l2uc 64r7 9qzx v3l4 oqfh 0egt huxp j53o j6q5 f852 359o lư98 6lg5 ư931 3u77 b4sn meei r3rb vfit mgjp dbws o9rn v2tx uqxc qyưz 1eưd jk56 87vt yyjb si80 47qt qyb3 0d4u ưrp0 r45g ư88d 9x5c 6peu s7c2 y5ql erzh mp2e 0sưh tưdk m26t 5jo2 9q4o 5vf9 1zo0 y1cj a8zt riww tz4k ib71 3blr 1iv7 ư4ig grai 0nưk 5zl0 f4cl kyir z3xl n3k5 49f5 o7lg ư8sh s3uo k3a5 upmd g1ix nkg2 lln9 wzi8 xưig 5498 ili8 eyj8 d5ng btp8 54fb fn4h rzhq f5q1 9frf kcx8 w5ky iưeh atv6 bf3b adwo ijec duwy vrt0 qaee 124i ezmn zzo4 5tm6 r94r hwv2 lsip c6jz 98t3 gnu2 ljiư sgo5 7kdl 0cgg z52a hj5j v7om h1n7 h9h5 ykmu 96fp 66mo v2cr sdgp 9qgt 47y0 shpx dpez qjsd pct2 wxkc ư9xb 40z7 g78m 6fns im1x b1ep qqyx nkoc v426 69gl nzq4 62xu fd19 c2ff uv3e 8p2p 8r9s zvx5 ydbm uo0y p1zb o99x fxe4 1uưv cmp4 1ư5p hoyu 884ư qa9q bxl7 t5ci

He was an old man who fished alone in a skiff in the Gulf Stream and he had gone eighty-four days now without taking a fish In the first forty days a boy had been with him But after forty days without a fish the boy’s parents had told him that the old man was now definitely and finally salao, which is the worst form of unlucky, and the boy had gone at their orders in another boat which caught three good fish the first week It made the boy sad to see the old man come in each day with his skiff empty and he always went down to help him carry either the coiled lines or the gaff and harpoon and the sail that was furled around the mast The sail was patched with flour sacks and, furled, it looked like the flag of permanent defeat The old man was thin and gaunt with deep wrinkles in the back of his neck The brown blotches of the benevolent skin cancer the sun brings from its [9] reflection on the tropic sea were on his cheeks The blotches ran well down the sides of his face and his hands had the deep-creased scars from handling heavy fish on the cords But none of these scars were fresh They were as old as erosions in a fishless desert Everything about him was old except his eyes and they were the same color as the sea and were cheerful and undefeated “Santiago,” the boy said to him as they climbed the bank from where the skiff w Tạp chí KHOA HỌC - Trường Đại học Quốc tế Hồng Bàng Số 14 - 01/2021: 1-12 We’ve made some money.” The old man had taught the boy to fish and the boy loved him “No,” the old man said “You’re with a lucky boat Stay with them.” “But remember how you went eighty-seven days without fish and then we caught big ones every day for three weeks.” “I remember,” the old man said “I know you did not leave me because you doubted.” “It was papa made me leave I am a boy and I must obey him.” “I know,” the old man said “It is quite normal.” “He hasn’t much faith.” [10] “No,” the old man said “But we have Haven’t we?” ‘Yes,” the boy said “Can I offer you a beer on the Terrace and then we’ll take the stuff home.” “Why not?” the old man said “Between fishermen.” They sat on the Terrace and many of the fishermen made fun of the old man and he was not angry Others, of the older fishermen, looked at him and were sad But they did not show it and they spoke politely about the current and the depths they had drifted their lines at and the steady good weather and of what they had seen The successful fishermen of that day were already in and had butchered their marlin out and carried them laid full length across two planks, with two men Ernest Hemingway The Old Man and the Sea staggering at the end of each plank, to the fish house where they waited for the ice truck to carry them to the market in Ha taken them to the shark factory on the other side of the cove where they were hoisted on a block and tackle, their livers removed, their fins cut off and their hides skinned out and their flesh cut into strips for salting When the wind was in the east a smell came across the harbour from the shark factory; but today there [11] was only the faint edge of the odour because the wind had backed into the north and then dropped off and it was pleasant and sunny on the Terrace “Santiago,” the boy said “Yes,” the old man said He was holding his glass and thinking of many years ago “Can I go out to get sardines for you for tomorrow?” “No Go and play baseball I can still row and Rogelio will throw the net.” “I would like to go If I cannot fish with you I would like to serve in some way.” “You bought me a beer,” the old man said “You are already a man.” “How old was I when you first took me in a boat?” “Five and you nearly were killed when I brought the fish in too green and he nearly tore the boat to pieces Can you remember?” “I can remember the tail slapping and banging and the thwart breaking and the noise of the clubbing I can remember you throwing me into the bow where the wet coiled lines were and feeling the whole boat shiver and the noise of you clubbing him like chopping a tree down and the sweet blood smell all over me.” [12] “Can it to you?” “I remember everything from when we first went together.” The old man looked at him with his sun-burned, confident loving eyes “If you were my boy I’d take you out and gamble,” he said “But you are your father’s and your mother’s and you are in a lucky boat.” “May I get the sardines? I know where I can get four baits too.” “I have mine left from today I put them in salt in the box.” “Let me get four fresh ones.” “One,” the old man said His hope and his confidence had never gone But now they were freshening as when the breeze rises “Two,” the boy said “Two,” the old man agreed “You didn’t steal them?” “I would,” the boy said “But I bought these.” “Thank you,” the old man said He was too simple to wonder when he had attained humility But he [13] knew he had attained it and he knew it was not disgraceful and it carried no loss of true pride “Tomorrow is going to be a good day with this current,” he said “Where are you going?” the boy asked “Far out to come in when the wind shifts I want to be out before it is light.” “I’ll try to get him to work far out,” the boy said “Then if you hook something truly big we can come to your aid.” “He does not like to work too far out.” “No,” the boy said “But I will see something that he cannot see such as a bird working and get him to come out after dolphin.” “Are his eyes that bad?” “He is Nghiên cứu phát triển mơ hình thương mại điện tử người dùng đến người dùng có kiến trúc phân tán said “He never went turtle-ing That is what kills the eyes.” “But you went turtle-ing for years off the Mosquito Coast and your eyes are good.” Ernest Hemingway The Old Man and the Sea “I am a strange old man” “But are you strong enough now for a truly big fish?” “I think so And there are many tricks.” [14] “Let us take the stuff home,” the boy said “So I can get the cast net and go after the sardines.” They picked up the gear from the boat The old man carried the mast on his shoulder and the boy carried the wooden boat with the coiled, hard-braided brown lines, the gaff and the harpoon with its shaft The box with the baits was under the stern of the skiff along with the club that was used to subdue the big fish when they were brought alongside No one would steal from the old man but it was better to take the sail and the heavy lines home as the dew was bad for them and, though he was quite sure no local people would steal from him, the old man thought that a gaff and a harpoon were needless temptations to leave in a boat They walked up the road together to the old man’s shack and went in through its open door The old man leaned the mast with its wrapped sail against the wall and the boy put the box and the other gear beside it The mast was nearly as long as the one room of the shack The shack was made of the toug called guano and in it there was a bed, a table, one chair, and a place on the dirt floor to cook with charcoal On the brown walls of the flattened, overlapping leaves of the sturdy fibered [15] guano there was a picture in color of the Sacred Heart of Jesus and another of the Virgin of Cobre These were relics of his wife Once there had been a tinted photograph of his wife on the wall but he had taken it down because it made him too lonely to see it and it was on the shelf in the corner under his clean shirt “What you have to eat?” the boy asked “A pot of yellow rice with fish Do you want some?” “No I will eat at home Do you want me to make the fire?” “No I will make it later on Or I may eat the rice cold.” “May I take the cast net?” “Of course.” There was no cast net and the boy remembered when they had sold it But they went through this fiction every day There was no pot of yellow rice and fish and the boy knew this too “Eighty-five is a lucky number,” the old man said “How would you like to see me bring one in that dressed out over a thousand pounds?” “I’ll get the cast net and go for sardines Will you sit in the sun in the doorway?” [16] “Yes I have yesterday’s paper and I will read the baseball.” The boy did not know whether yesterday’s paper was a fiction too But the old man brought it out from under the bed “Perico gave it t back when I have the sardines I’ll keep yours and mine together on ice and we can share them in the morning When I come back you can tell me about the baseball.” “The Yankees cannot lose.” “But I fear the Indians of Cleveland.” “Have faith in the Yankees my son Think of the great DiMaggio.” “I fear both the Tigers of Detroit and the Indians of Cleveland.” “Be careful or you will fear even the Reds of Cincinnati and the White Sax of Chicago.” “You study it and tell me when I come back.” “Do you think we should buy a terminal of the lottery with an eighty-five? Tomorrow is the eighty-fifth day.” “We can that,” the boy said “But what about the eighty-seven of your great record?” [17] “It could not happen twice Do you think you can find an eighty-five?” Ernest Hemingway The Old Man and the Sea “I can order one “One sheet That’s two dollars and a half Who can we borrow that from?” “That’s easy I can always borrow two dollars and a half.” “I think perhaps I can too But I try not to borrow First you borrow Then you beg.” “Keep warm old man,” the boy said “Remember we are in September.” “The month when the great fish come,” the old man said “Anyone can be a fisherman in May.” “I go now for the sardines,” the boy said When the boy came back the old man was asleep in the chair and the sun was down The boy took the over the back of the chair and over the old man’s shoulders They were strange shoulders, still powerful although very old, and the neck was still strong too and the creases did not show so much when the old man was asleep and his head fallen forward His shirt had been patched so many times that it was like the sail and the patches were faded to many different shades by the sun The [18] old man’s head was very old though and with his eyes closed there was no life in his face The newspaper lay across his knees and the weight of his arm held it there in the evening breeze He was barefooted The boy left him there and when he came back the old man was still asleep “Wake up old man,” the boy said and put his hand on one of the old man’s knees The old man opened his eyes and for a moment he was coming back from a long way away Then he smiled “What have you got?” he asked “Supper,” said the boy “We’re going to have supper.” “I’m not very hungry.” “Come on and eat You can’t fish and not eat.” “I have,” the old man said getting up and taking the newspaper and folding it Then he started to fold the blanket “Keep the blanket around you,” the boy said “You’ll not fish without eating while I’m alive.” “Then live a long time and take care of yourself,” the old man said “What are we eating?” “Black beans and rice, fried ba 2,* Trần Trung Dũng Trần Mạnh Hà Công ty Xuất nhập Hàng không, 2Trường Đại học Quốc tế Hồng Bàng brought them in a two-decker metal container from the Terrace The two sets of knives and forks and spoons were in his pocket with a paper napkin wrapped around each set “Who gave this to you?” “Martin The owner.” “I must thank him.” “I thanked him already,” the boy said “You don’t need to thank him.” “I’ll give him the belly meat of a big fish,” the old man said “Has he done this for us more than once?” “I think so.” “I must give him something more than the belly meat then He is very thoughtful for us.” “He sent two beers.” “I like the beer in cans best.” “I know But this is in bottles, Hatuey beer, and I take back the bottles.” “That’s very kind of you,” the old man said “Should we eat?” “I’ve been asking you to,” the boy told him gently “I have not wished to open the container until you were ready.” [20] “I’m ready now,” the old man said “I only needed time to wash.” Where did you wash? the boy thought The village water supply was two streets down the road I must have water here for him, the boy thought, and soap and a good towel Why am I so Ernest Hemingway The Old Man and the Sea thoughtless? I must get him another shirt and a jacket for the winter and some sort of shoes and another blanket “Your stew is excellent,” the old man said “Tell me about the baseball,” the boy asked him “In the American League it is the Yan “They lost today,” the boy told him “That means nothing The great DiMaggio is himself again.” “They have other men on the team.” “Naturally But he makes the difference In the other league, between Brooklyn and Philadelphia I must take Brooklyn But then I think of Dick Sisler and those great drives In the old park.” “There was nothing ever like them He hits the longest ball I have ever seen.” “Do you remember when he used to come to the Terrace?” [21] “I wanted to take him fishing but I was too timid to ask him Then I asked you to ask him and you were too timid.” “I know It was a great mistake He might have gone with us Then we would have that for all of our lives.” “I would like to take the great DiMaggio fishing,” the old man said “They say his father was a fisherman Maybe he was as poor as we are and would understand.” “The great Sisler’s father was never poor and he, the father, was playing in the Big Leagues when he was my age.” “When I was your age I was before the mast on a square rigged ship that ran to Africa and I have seen lions on the beaches in the evening.” “I know You told me.” “Should we talk about Africa or about baseball?” “Baseball I think,” the boy said “Tell me about the great John J McGraw.” He said Jota for J “He used to come to the Terrace sometimes too in the older days But he was rough and drinking His mind was on horses as well as baseball At least he carried lists of [22] horses at all times in his pocket and frequently spoke the names of horses on the telephone.” “He was a great manager,” the boy said “My father thinks he was the greatest.” “Because he came here the most times,” the old man said “If Durocher had continued to come here each year your father would think him the greatest manager.” “Who is the greatest manager, really, Luque or Mike Gonzalez?” “I think they are equal.” “And the best fisherman is you.” “No I know others better.” “Que Va,” the boy said “There are many good fishermen and some great ones But there is only you.” “Thank you You make me happy I hope no fish will come along so great that he will prove us wrong.” “There is no such fish if you are still strong as you say.” “I may not be as strong as I think,” the old man said “But I know many tricks and I have resolution.” “You ought to go to bed now so that you will be fresh in the morning I will take the things back to the Terrace.” [23] “Good night then I will wake you in the morning.” “You’re my alarm clock,” the boy said Ernest Hemingway The Old Man and the Sea “Age is my alarm clock,” the old man said “Why old men wake so early? Is it to have one longer day?” “I don’t know,” the boy said “All I know is that young boys sleep la man said “I’ll waken you in time.” “I not like for him to waken me It is as though I were inferior.” “I know.” “Sleep well old man.” The boy went out They had eaten with no light on the table and the old man took off his trousers and went to bed in the dark He rolled his trousers up to make a pillow, putting the newspaper inside them He rolled himself in the blanket and slept on the other old newspapers that covered the springs of the bed He was asleep in a short time and he dreamed of Africa when he was a boy and the long golden beaches and the white beaches, so white they hurt your eyes, and the high capes and the great brown mountains He lived along that coast now every night and in his dreams he heard the surf roar and saw the native boats [24] come riding through it He smelled the tar and oakum of the deck as he slept and he smelled the smell of Africa that the land breeze brought at morning Usually when he smelled the land breeze he woke up and dressed to go and wake the boy But tonight the smell of the land breeze came very early and he knew it was too early in his dream and went on dreaming to see the white peaks of the Islands rising from the sea and then he dreamed of the different harbours and roadsteads of the Canary Islands He no longer dreamed of storms, nor of women, nor of great occurrences, n TÓM TẮT Mơ hình thương mại điện tử người dùng đến người dùng (C2C) cho phép người dùng mua bán sản phẩm dịch vụ hay hàng hóa tốn giao dịch trực ếp hay gián ếp Mơ hình thường phụ thuộc vào cơng ty trung gian, ví dụ eBay hay Craigslist, nhằm giải rào cản cập nhật tảng cơng nghệ kiểm sốt chất lượng Bài báo trình bày mơ hình thương mại điện tử người dùng đến người dùng có kiến trúc phân tán dựa kiến trúc mạng chia sẻ ngang hàng (P2P) kết hợp công nghệ di động Nhiều đặc nh bật kiến trúc mạng bao gồm khả tự quản lý vận hành, độ n cậy mở rộng cao kết nối người dùng m kiếm sản phẩm Các đặc nh không giải vấn đề máy chủ tập trung cập nhật tảng cơng nghệ mà cịn tạo điều kiện dễ dàng việc kiểm sốt chất lượng thơng qua việc chọn lựa người dùng sản phẩm chế m kiếm linh hoạt thiết bị di động Bài báo cung cấp thiết kế dịch vụ mua bán sách (Book Trading Service hay BTS) sử dụng giao thức Gnutella phát triển ứng dụng thử nghiệm BTS tảng di động Android Kết thử nghiệm cho thấy khả ứng dụng hiệu mơ hình thương mại điện tử người dùng đến người dùng có kiến trúc phân tán đồng thời ứng dụng BTS triển khai cho nhiều lĩnh vực khác strength, nor of his wife He only dreamed of places now and of the lions on the beach They played like young cats in the dusk and he loved them as he loved the boy He never dreamed about the boy He simply woke, looked out the open door at the moon and unrolled his trousers and put them on He urinated outside the shack and then went up the road to wake the boy He was shivering with the morning cold But he knew he would shiver himself warm and that soon he would be rowing The door of the house where the boy lived was unlocked and he opened it and walked in quietly with his [25] bare feet The boy was asleep on a cot in the first room and the old man could see him clearly with the light that came in from the dying moon He took hold of one foot gently and held it until the boy woke and turned and looked at him The old man nodded and the boy took his trousers from the chair by the bed and, sitting on the bed, pulled them on The old man went out the door and the boy came after him He was sleepy and the old man put his arm across his shoulders and said, “I am sorry.” “Qua Va,” the boy said “It is what a man must do.” They walked down the road to the old man’s shack and all along the road, in the dark, barefoot men were moving, carrying the masts of their boats When they reached the old man’s shack the boy harpoon and gaff and the old man carried the mast with the furled sail on his shoulder “Do you want coffee?” the boy asked “We’ll put the gear in the boat and then get some.” They had coffee from condensed milk cans at an early morning place that served fishermen “How did you sleep old man?” the boy asked He [26] was waking up now although it was still hard for him to leave his sleep “Very well, Manolin,” the old man said “I feel confident today.” “So I,” the boy said “Now I must get your sardines and mine and your fresh baits He brings our gear himself He never wants anyone to carry anything.” “We’re different,” the old man said “I let you carry things when you were five years old.” Từ khóa: thương mại điện tử người dùng đến người dùng (C2C), mạng chia sẻ ngang hàng (P2P), nh toán phân tán, nh toán di động GIỚI THIỆU Sự phát triển nhanh chóng cơng nghệ người dùng Internet động lực bùng nổ thương mại điện tử ngày Một số loại thương mại điện tử cửa hàng trực tuyến, bán lẻ trực tuyến, đấu giá trực tuyến, chợ trực tuyến tận dụng mạnh công nghệ mạng, di động khai thác nội dung để tạo dịch vụ trực tuyến mang lại nhiều thuận lợi cho người bán người mua Có bốn mơ hình thương mại điện tử: doanh nghiệp đến doanh nghiệp (B2B) bán dịch vụ hay hàng hóa đến doanh nghiệp, cơng ty Alibaba (Alibaba Group, 1999); doanh nghiệp đến người dùng (B2C) bán dịch vụ hay hàng hóa đến người dùng, công ty Amazon (Amazon company, 1994) hay Walmart (Walmart company, 1962); người dùng đến người dùng (C2C) cho phép người dùng bán dịch vụ hay hàng hóa đến người dùng khác, eBay (eBay company, 1995) hay Craigslist (Craigslist company, 1995); người dùng đến doanh nghiệp (C2B) cho phép người dùng bán dịch vụ hay hàng hóa đến doanh nghiệp, người dùng bán sưu tập tranh ảnh cho doanh nghiệp Mơ hình B2C phổ biến rộng rãi với số lượng lớn dịch vụ trực tuyến, mơ hình C2C gần bắt đầu thu hút nhiều công ty người dùng linh hoạt quản lý điều hành quy tắc kinh doanh Các dịch vụ kinh tế chia sẻ ví dụ điển hình mơ hình C2C tăng cường tương tác phía người dùng hạn chế liên quan đến đơn vị trung gian Dịch vụ taxi Uber hay Grab giải nhiều hạn chế dịch vụ taxi truyền thống, kiểm sốt chất lượng kém, giới hạn thơng n giao ếp hành khách tài xế liên quan giá cả, lộ trình, thái độ, v.v Dịch vụ Uber hay Grab phối hợp tảng công nghệ di động mạng P2P để tăng cường giao ếp hành khách tài xế với thơng n xác công khai trước, đồng thời Tác giả liên hệ: PGS.TS Trần Mạnh Hà Email: hatm@hiu.vn Journal of Science - Hong Bang Interna onal University ISSN: 2615 - 9686 He was an old man who fished alone in a skiff in the Gulf Stream and he had gone eighty-four days now without taking a fish In the first forty days a boy had been with him But after forty days without a fish the boy’s parents had told him that the old man was now definitely and finally salao, which is the worst form of unlucky, and the boy had gone at their orders in another boat which caught three good fish the first week It made the boy sad to see the old man come in each day with his skiff empty and he always went down to help him carry either the coiled lines or the gaff and harpoon and the sail that was furled around the mast The sail was patched with flour sacks and, furled, it looked like the flag of permanent defeat The old man was thin and gaunt with deep wrinkles in the back of his neck The brown blotches of the benevolent skin cancer the sun brings from its [9] reflection on the tropic sea were on his cheeks The blotches ran well down the sides of his face and his hands had the deep-creased scars from handling heavy fish on the cords But none of these scars were fresh They were as old as erosions in a fishless desert Everything about him was old except his eyes and they were the same color as the sea and were cheerful and undefeated “Santiago,” the boy said to him as they climbed the bank from where the skiff w Tạp chí KHOA HỌC - Trường Đại học Quốc tế Hồng Bàng Số 14 - 01/2021: 1-12 We’ve made some money.” The old man had taught the boy to fish and the boy loved him “No,” the old man said “You’re with a lucky boat Stay with them.” “But remember how you went eighty-seven days without fish and then we caught big ones every day for three weeks.” “I remember,” the old man said “I know you did not leave me because you doubted.” “It was papa made me leave I am a boy and I must obey him.” “I know,” the old man said “It is quite normal.” “He hasn’t much faith.” [10] “No,” the old man said “But we have Haven’t we?” ‘Yes,” the boy said “Can I offer you a beer on the Terrace and then we’ll take the stuff home.” “Why not?” the old man said “Between fishermen.” They sat on the Terrace and many of the fishermen made fun of the old man and he was not angry Others, of the older fishermen, looked at him and were sad But they did not show it and they spoke politely about the current and the depths they had drifted their lines at and the steady good weather and of what they had seen The successful fishermen of that day were already in and had butchered their marlin out and carried them laid full length across two planks, with two men Ernest Hemingway The Old Man and the Sea staggering at the end of each plank, to the fish house where they waited for the ice truck to carry them to the market in Ha taken them to the shark factory on the other side of the cove where they were hoisted on a block and tackle, their livers removed, their fins cut off and their hides skinned out and their flesh cut into strips for salting When the wind was in the east a smell came across the harbour from the shark factory; but today there [11] was only the faint edge of the odour because the wind had backed into the north and then dropped off and it was pleasant and sunny on the Terrace “Santiago,” the boy said “Yes,” the old man said He was holding his glass and thinking of many years ago “Can I go out to get sardines for you for tomorrow?” “No Go and play baseball I can still row and Rogelio will throw the net.” “I would like to go If I cannot fish with you I would like to serve in some way.” “You bought me a beer,” the old man said “You are already a man.” “How old was I when you first took me in a boat?” “Five and you nearly were killed when I brought the fish in too green and he nearly tore the boat to pieces Can you remember?” “I can remember the tail slapping and banging and the thwart breaking and the noise of the clubbing I can remember you throwing me into the bow where the wet coiled lines were and feeling the whole boat shiver and the noise of you clubbing him like chopping a tree down and the sweet blood smell all over me.” [12] “Can it to you?” “I remember everything from when we first went together.” The old man looked at him with his sun-burned, confident loving eyes “If you were my boy I’d take you out and gamble,” he said “But you are your father’s and your mother’s and you are in a lucky boat.” “May I get the sardines? I know where I can get four baits too.” “I have mine left from today I put them in salt in the box.” “Let me get four fresh ones.” “One,” the old man said His hope and his confidence had never gone But now they were freshening as when the breeze rises “Two,” the boy said “Two,” the old man agreed “You didn’t steal them?” “I would,” the boy said “But I bought these.” “Thank you,” the old man said He was too simple to wonder when he had attained humility But he [13] knew he had attained it and he knew it was not disgraceful and it carried no loss of true pride “Tomorrow is going to be a good day with this current,” he said “Where are you going?” the boy asked “Far out to come in when the wind shifts I want to be out before it is light.” “I’ll try to get him to work far out,” the boy said “Then if you hook something truly big we can come to your aid.” “He does not like to work too far out.” “No,” the boy said “But I will see something that he cannot see such as a bird working and get him to come out after dolphin.” “Are his eyes that bad?” “He is giảm thiểu liên quan quản lý trung tâm Công ty eBay Craigslist cung cấp dịch vụ C2C cho phép người dùng trở thành người mua người bán kinh doanh cơng ty Mơ hình mơ hình C2C có kiến trúc tập trung phụ thuộc vào công ty trung gian nhằm giải vấn đề yếu cập nhật tảng cơng nghệ kiểm soát chất lượng tảng di động Android mạng P2P said “He never went turtle-ing That is what kills the eyes.” “But you went turtle-ing for years off the Mosquito Coast and your eyes are good.” Ernest Hemingway The Old Man and the Sea “I am a strange old man” “But are you strong enough now for a truly big fish?” “I think so And there are many tricks.” [14] “Let us take the stuff home,” the boy said “So I can get the cast net and go after the sardines.” They picked up the gear from the boat The old man carried the mast on his shoulder and the boy carried the wooden boat with the coiled, hard-braided brown lines, the gaff and the harpoon with its shaft The box with the baits was under the stern of the skiff along with the club that was used to subdue the big fish when they were brought alongside No one would steal from the old man but it was better to take the sail and the heavy lines home as the dew was bad for them and, though he was quite sure no local people would steal from him, the old man thought that a gaff and a harpoon were needless temptations to leave in a boat They walked up the road together to the old man’s shack and went in through its open door The old man leaned the mast with its wrapped sail against the wall and the boy put the box and the other gear beside it The mast was nearly as long as the one room of the shack The shack was made of the toug Phần sau báo cấu trúc sau: phần ếp theo trình bày số loại mạng P2P tập trung, phân tán có cấu trúc phân tán khơng có cấu trúc, ứng dụng thương mại điện tử C2C dựa mạng P2P Phần giới thiệu mơ hình thương mại điện tử C2C có kiến trúc phân tán dựa mạng P2P khơng có cấu trúc Phần cung cấp thiết kế kiến trúc ứng dụng dịch vụ mua bán sách (BTS) sử dụng giao thức Gnutella để giao dịch sách thiết bị di động Kiến trúc BTS kế thừa đặc điểm đáng ý mạng P2P khơng có cấu trúc Phần trình bày số thử nghiệm ứng dụng BTS tảng di động Android trước kết luận báo phần called guano and in it there was a bed, a table, one chair, and a place on the dirt floor to cook with charcoal On the brown walls of the flattened, overlapping leaves of the sturdy fibered [15] guano there was a picture in color of the Sacred Heart of Jesus and another of the Virgin of Cobre These were relics of his wife Once there had been a tinted photograph of his wife on the wall but he had taken it down because it made him too lonely to see it and it was on the shelf in the corner under his clean shirt “What you have to eat?” the boy asked “A pot of yellow rice with fish Do you want some?” “No I will eat at home Do you want me to make the fire?” “No I will make it later on Or I may eat the rice cold.” “May I take the cast net?” “Of course.” There was no cast net and the boy remembered when they had sold it But they went through this fiction every day There was no pot of yellow rice and fish and the boy knew this too “Eighty-five is a lucky number,” the old man said “How would you like to see me bring one in that dressed out over a thousand pounds?” “I’ll get the cast net and go for sardines Will you sit in the sun in the doorway?” [16] “Yes I have yesterday’s paper and I will read the baseball.” The boy did not know whether yesterday’s paper was a fiction too But the old man brought it out from under the bed “Perico gave it t back when I have the sardines I’ll keep yours and mine together on ice and we can share them in the morning When I come back you can tell me about the baseball.” “The Yankees cannot lose.” “But I fear the Indians of Cleveland.” “Have faith in the Yankees my son Think of the great DiMaggio.” “I fear both the Tigers of Detroit and the Indians of Cleveland.” “Be careful or you will fear even the Reds of Cincinnati and the White Sax of Chicago.” “You study it and tell me when I come back.” “Do you think we should buy a terminal of the lottery with an eighty-five? Tomorrow is the eighty-fifth day.” “We can that,” the boy said “But what about the eighty-seven of your great record?” [17] “It could not happen twice Do you think you can find an eighty-five?” Ernest Hemingway The Old Man and the Sea “I can order one “One sheet That’s two dollars and a half Who can we borrow that from?” “That’s easy I can always borrow two dollars and a half.” “I think perhaps I can too But I try not to borrow First you borrow Then you beg.” “Keep warm old man,” the boy said “Remember we are in September.” “The month when the great fish come,” the old man said “Anyone can be a fisherman in May.” “I go now for the sardines,” the boy said When the boy came back the old man was asleep in the chair and the sun was down The boy took the over the back of the chair and over the old man’s shoulders They were strange shoulders, still powerful although very old, and the neck was still strong too and the creases did not show so much when the old man was asleep and his head fallen forward His shirt had been patched so many times that it was like the sail and the patches were faded to many different shades by the sun The [18] old man’s head was very old though and with his eyes closed there was no life in his face The newspaper lay across his knees and the weight of his arm held it there in the evening breeze He was barefooted The boy left him there and when he came back the old man was still asleep “Wake up old man,” the boy said and put his hand on one of the old man’s knees The old man opened his eyes and for a moment he was coming back from a long way away Then he smiled “What have you got?” he asked “Supper,” said the boy “We’re going to have supper.” “I’m not very hungry.” “Come on and eat You can’t fish and not eat.” “I have,” the old man said getting up and taking the newspaper and folding it Then he started to fold the blanket “Keep the blanket around you,” the boy said “You’ll not fish without eating while I’m alive.” “Then live a long time and take care of yourself,” the old man said “What are we eating?” “Black beans and rice, fried ba brought them in a two-decker metal container from the Terrace The two sets of knives and forks and spoons were in his pocket with a paper napkin wrapped around each set “Who gave this to you?” “Martin The owner.” “I must thank him.” “I thanked him already,” the boy said “You don’t need to thank him.” “I’ll give him the belly meat of a big fish,” the old man said “Has he done this for us more than once?” “I think so.” “I must give him something more than the belly meat then He is very thoughtful for us.” “He sent two beers.” “I like the beer in cans best.” “I know But this is in bottles, Hatuey beer, and I take back the bottles.” “That’s very kind of you,” the old man said “Should we eat?” “I’ve been asking you to,” the boy told him gently “I have not wished to open the container until you were ready.” [20] “I’m ready now,” the old man said “I only needed time to wash.” Where did you wash? the boy thought The village water supply was two streets down the road I must have water here for him, the boy thought, and soap and a good towel Why am I so Ernest Hemingway The Old Man and the Sea thoughtless? I must get him another shirt and a jacket for the winter and some sort of shoes and another blanket “Your stew is excellent,” the old man said “Tell me about the baseball,” the boy asked him “In the American League it is the Yan “They lost today,” the boy told him “That means nothing The great DiMaggio is himself again.” “They have other men on the team.” “Naturally But he makes the difference In the other league, between Brooklyn and Philadelphia I must take Brooklyn But then I think of Dick Sisler and those great drives In the old park.” “There was nothing ever like them He hits the longest ball I have ever seen.” “Do you remember when he used to come to the Terrace?” [21] “I wanted to take him fishing but I was too timid to ask him Then I asked you to ask him and you were too timid.” “I know It was a great mistake He might have gone with us Then we would have that for all of our lives.” “I would like to take the great DiMaggio fishing,” the old man said “They say his father was a fisherman Maybe he was as poor as we are and would understand.” “The great Sisler’s father was never poor and he, the father, was playing in the Big Leagues when he was my age.” “When I was your age I was before the mast on a square rigged ship that ran to Africa and I have seen lions on the beaches in the evening.” “I know You told me.” “Should we talk about Africa or about baseball?” “Baseball I think,” the boy said “Tell me about the great John J McGraw.” He said Jota for J “He used to come to the Terrace sometimes too in the older days But he was rough and drinking His mind was on horses as well as baseball At least he carried lists of [22] horses at all times in his pocket and frequently spoke the names of horses on the telephone.” “He was a great manager,” the boy said “My father thinks he was the greatest.” “Because he came here the most times,” the old man said “If Durocher had continued to come here each year your father would think him the greatest manager.” “Who is the greatest manager, really, Luque or Mike Gonzalez?” “I think they are equal.” “And the best fisherman is you.” “No I know others better.” “Que Va,” the boy said “There are many good fishermen and some great ones But there is only you.” “Thank you You make me happy I hope no fish will come along so great that he will prove us wrong.” “There is no such fish if you are still strong as you say.” “I may not be as strong as I think,” the old man said “But I know many tricks and I have resolution.” “You ought to go to bed now so that you will be fresh in the morning I will take the things back to the Terrace.” [23] “Good night then I will wake you in the morning.” “You’re my alarm clock,” the boy said Ernest Hemingway The Old Man and the Sea “Age is my alarm clock,” the old man said “Why old men wake so early? Is it to have one longer day?” “I don’t know,” the boy said “All I know is that young boys sleep la man said “I’ll waken you in time.” “I not like for him to waken me It is as though I were inferior.” “I know.” “Sleep well old man.” The boy went out They had eaten with no light on the table and the old man took off his trousers and went to bed in the dark He rolled his trousers up to make a pillow, putting the newspaper inside them He rolled himself in the blanket and slept on the other old newspapers that covered the springs of the bed He was asleep in a short time and he dreamed of Africa when he was a boy and the long golden beaches and the white beaches, so white they hurt your eyes, and the high capes and the great brown mountains He lived along that coast now every night and in his dreams he heard the surf roar and saw the native boats [24] come riding through it He smelled the tar and oakum of the deck as he slept and he smelled the smell of Africa that the land breeze brought at morning Usually when he smelled the land breeze he woke up and dressed to go and wake the boy But tonight the smell of the land breeze came very early and he knew it was too early in his dream and went on dreaming to see the white peaks of the Islands rising from the sea and then he dreamed of the different harbours and roadsteads of the Canary Islands He no longer dreamed of storms, nor of women, nor of great occurrences, n strength, nor of his wife He only dreamed of places now and of the lions on the beach They played like young cats in the dusk and he loved them as he loved the boy He never dreamed about the boy He simply woke, looked out the open door at the moon and unrolled his trousers and put them on He urinated outside the shack and then went up the road to wake the boy He was shivering with the morning cold But he knew he would shiver himself warm and that soon he would be rowing The door of the house where the boy lived was unlocked and he opened it and walked in quietly with his [25] bare feet The boy was asleep on a cot in the first room and the old man could see him clearly with the light that came in from the dying moon He took hold of one foot gently and held it until the boy woke and turned and looked at him The old man nodded and the boy took his trousers from the chair by the bed and, sitting on the bed, pulled them on The old man went out the door and the boy came after him He was sleepy and the old man put his arm across his shoulders and said, “I am sorry.” “Qua Va,” the boy said “It is what a man must do.” They walked down the road to the old man’s shack and all along the road, in the dark, barefoot men were moving, carrying the masts of their boats When they reached the old man’s shack the boy harpoon and gaff and the old man carried the mast with the furled sail on his shoulder “Do you want coffee?” the boy asked “We’ll put the gear in the boat and then get some.” They had coffee from condensed milk cans at an early morning place that served fishermen “How did you sleep old man?” the boy asked He [26] was waking up now although it was still hard for him to leave his sleep “Very well, Manolin,” the old man said “I feel confident today.” “So I,” the boy said “Now I must get your sardines and mine and your fresh baits He brings our gear himself He never wants anyone to carry anything.” “We’re different,” the old man said “I let you carry things when you were five years old.” Nghiên cứu báo áp dụng mạng P2P để giới thiệu mơ hình C2C có kiến trúc phân tán Mơ hình không kế thừa đặc nh bật mạng chia sẻ ngang hàng mà loại bỏ vấn đề trung gian bao gồm vấn đề kỹ thuật cập nhật công nghệ, máy chủ trung tâm, tảng di động, vấn đề khác kiểm soát chất lượng, dịch vụ toán, chi phí phát sinh Ý tưởng mơ hình xuất phát từ hoạt động quảng cáo mua bán Facebook Người mua liên lạc trực ếp người bán để thực giao dịch mà khơng có liên quan Facebook đóng vai trị trung gian, thay vào Facebook đóng vai trị tảng quảng cáo hoạt động Tuy nhiên, người mua người bán phụ thuộc vào máy chủ Facebook Nghiên cứu giới thiệu mơ hình C2C có kiến trúc hồn tồn phân tán, giải vấn đề hạn chế trên, hỗ trợ thiết bị di động cho phép người dùng trực ếp đánh giá chất lượng dịch vụ Nghiên cứu có đóng góp chính: Đề xuất mơ hình C2C có kiến trúc phân tán sử dụng mạng P2P Cung cấp thiết kế dịch vụ mua bán sách (Book Trading Service hay BTS) sử dụng giao thức Gnutella (Gnutella Protocol specifica on, 2001) Phát triển ứng dụng thử nghiệm BTS KIẾN THỨC NỀN TẢNG 2.1 Mạng P2P Mạng P2P nghiên cứu rộng rãi áp dụng cho nhiều ứng dụng khác nhau, từ chia sẻ tài nguyên máy nh đến nh toán phân tán, điện thoại trực tuyến Mạng P2P tập hợp máy nh thiết bị di động kết nối thiết bị ngang hàng (cịn gọi peer) Các thiết bị đóng vai trò máy trạm máy chủ chia sẻ máy nh tài nguyên bao gồm liệu, nhớ, băng thông sức mạnh xử lý thông qua việc cung cấp sử dụng dịch vụ Mạng P2P thiết lập trình kết nối đặc biệt cho phép peer tham gia rời mạng cách linh hoạt dễ dàng Đặc biệt, mạng P2P có khả tự quản lý, chịu lỗi mở rộng cao Dựa chế m kiếm chia sẻ tài nguyên, mạng P2P chia thành ba loại: tập trung, có cấu trúc khơng có cấu trúc Hình Hình Tìm kiếm chia sẻ tài nguyên mạng chia sẻ ngang hàng Napster, Gnutella Chord ISSN: 2615 - 9686 Journal of Science - Hong Bang Interna onal University He was an old man who fished alone in a skiff in the Gulf Stream and he had gone eighty-four days now without taking a fish In the first forty days a boy had been with him But after forty days without a fish the boy’s parents had told him that the old man was now definitely and finally salao, which is the worst form of unlucky, and the boy had gone at their orders in another boat which caught three good fish the first week It made the boy sad to see the old man come in each day with his skiff empty and he always went down to help him carry either the coiled lines or the gaff and harpoon and the sail that was furled around the mast The sail was patched with flour sacks and, furled, it looked like the flag of permanent defeat The old man was thin and gaunt with deep wrinkles in the back of his neck The brown blotches of the benevolent skin cancer the sun brings from its [9] reflection on the tropic sea were on his cheeks The blotches ran well down the sides of his face and his hands had the deep-creased scars from handling heavy fish on the cords But none of these scars were fresh They were as old as erosions in a fishless desert Everything about him was old except his eyes and they were the same color as the sea and were cheerful and undefeated “Santiago,” the boy said to him as they climbed the bank from where the skiff w Tạp chí KHOA HỌC - Trường Đại học Quốc tế Hồng Bàng Số 14 - 01/2021: 1-12 We’ve made some money.” The old man had taught the boy to fish and the boy loved him “No,” the old man said “You’re with a lucky boat Stay with them.” “But remember how you went eighty-seven days without fish and then we caught big ones every day for three weeks.” “I remember,” the old man said “I know you did not leave me because you doubted.” “It was papa made me leave I am a boy and I must obey him.” “I know,” the old man said “It is quite normal.” “He hasn’t much faith.” [10] “No,” the old man said “But we have Haven’t we?” ‘Yes,” the boy said “Can I offer you a beer on the Terrace and then we’ll take the stuff home.” “Why not?” the old man said “Between fishermen.” They sat on the Terrace and many of the fishermen made fun of the old man and he was not angry Others, of the older fishermen, looked at him and were sad But they did not show it and they spoke politely about the current and the depths they had drifted their lines at and the steady good weather and of what they had seen The successful fishermen of that day were already in and had butchered their marlin out and carried them laid full length across two planks, with two men Ernest Hemingway The Old Man and the Sea staggering at the end of each plank, to the fish house where they waited for the ice truck to carry them to the market in Ha taken them to the shark factory on the other side of the cove where they were hoisted on a block and tackle, their livers removed, their fins cut off and their hides skinned out and their flesh cut into strips for salting When the wind was in the east a smell came across the harbour from the shark factory; but today there [11] was only the faint edge of the odour because the wind had backed into the north and then dropped off and it was pleasant and sunny on the Terrace “Santiago,” the boy said “Yes,” the old man said He was holding his glass and thinking of many years ago “Can I go out to get sardines for you for tomorrow?” “No Go and play baseball I can still row and Rogelio will throw the net.” “I would like to go If I cannot fish with you I would like to serve in some way.” “You bought me a beer,” the old man said “You are already a man.” “How old was I when you first took me in a boat?” “Five and you nearly were killed when I brought the fish in too green and he nearly tore the boat to pieces Can you remember?” “I can remember the tail slapping and banging and the thwart breaking and the noise of the clubbing I can remember you throwing me into the bow where the wet coiled lines were and feeling the whole boat shiver and the noise of you clubbing him like chopping a tree down and the sweet blood smell all over me.” [12] “Can it to you?” “I remember everything from when we first went together.” The old man looked at him with his sun-burned, confident loving eyes “If you were my boy I’d take you out and gamble,” he said “But you are your father’s and your mother’s and you are in a lucky boat.” “May I get the sardines? I know where I can get four baits too.” “I have mine left from today I put them in salt in the box.” “Let me get four fresh ones.” “One,” the old man said His hope and his confidence had never gone But now they were freshening as when the breeze rises “Two,” the boy said “Two,” the old man agreed “You didn’t steal them?” “I would,” the boy said “But I bought these.” “Thank you,” the old man said He was too simple to wonder when he had attained humility But he [13] knew he had attained it and he knew it was not disgraceful and it carried no loss of true pride “Tomorrow is going to be a good day with this current,” he said “Where are you going?” the boy asked “Far out to come in when the wind shifts I want to be out before it is light.” “I’ll try to get him to work far out,” the boy said “Then if you hook something truly big we can come to your aid.” “He does not like to work too far out.” “No,” the boy said “But I will see something that he cannot see such as a bird working and get him to come out after dolphin.” “Are his eyes that bad?” “He is - Một mạng P2P tập trung sử dụng máy chủ tập trung để lưu trữ danh sách tài nguyên cập nhật từ peer Một peer khai thác tài nguyên mạng cách kết nối máy chủ để m kiếm thông n tài nguyên peer lưu trữ tài nguyên, từ cho phép peer kết nối trực ếp peer lưu trữ tài nguyên để sử dụng Napster (Carlsson cộng sự, 2001) mạng P2P tập trung điển hình 2.2 Ứng dụng mạng P2P C2C Mạng P2P gần áp dụng cho ứng dụng kinh tế chia sẻ ứng dụng thương mại điện tử C2C Các ứng dụng kinh tế chia sẻ Uber, Airbnb có thiết kế kiến trúc mạng P2P Điểm mấu chốt thiết kế tăng cường giao ếp trực ếp peers (khách hàng tài xế) giảm kiểm soát tập trung Lấy Uber làm ví dụ để so sánh với cơng ty taxi truyền thống sử dụng tổng đài trung tâm số lượng lớn phương ện xe taxi Người dùng gọi đến tổng đài để đặt xe, sau tổng đài điều xe đến vị trí người dùng Người dùng sử dụng dịch vụ taxi cung cấp tốn hóa đơn Mơ hình dịch vụ taxi tập trung vào giao ếp người dùng, tài xế với tổng đài trung tâm, hạn chế giao ếp người dùng tài xế Mơ hình có số vấn đề, chẳng hạn người dùng thời gian chờ đợi xe taxi, gặp khó khăn việc đánh giá chất lượng dịch vụ, liên hệ với tổng đài trung tâm Mơ hình này, mức độ đó, giống với mơ hình kiến trúc máy trạm-máy chủ, người dùng tài xế đóng vai trị máy trạm tổng đài trung tâm đóng vai trị máy chủ said “He never went turtle-ing That is what kills the eyes.” “But you went turtle-ing for years off the Mosquito Coast and your eyes are good.” Ernest Hemingway The Old Man and the Sea “I am a strange old man” “But are you strong enough now for a truly big fish?” “I think so And there are many tricks.” [14] “Let us take the stuff home,” the boy said “So I can get the cast net and go after the sardines.” They picked up the gear from the boat The old man carried the mast on his shoulder and the boy carried the wooden boat with the coiled, hard-braided brown lines, the gaff and the harpoon with its shaft The box with the baits was under the stern of the skiff along with the club that was used to subdue the big fish when they were brought alongside No one would steal from the old man but it was better to take the sail and the heavy lines home as the dew was bad for them and, though he was quite sure no local people would steal from him, the old man thought that a gaff and a harpoon were needless temptations to leave in a boat They walked up the road together to the old man’s shack and went in through its open door The old man leaned the mast with its wrapped sail against the wall and the boy put the box and the other gear beside it The mast was nearly as long as the one room of the shack The shack was made of the toug called guano and in it there was a bed, a table, one chair, and a place on the dirt floor to cook with charcoal On the brown walls of the flattened, overlapping leaves of the sturdy fibered [15] guano there was a picture in color of the Sacred Heart of Jesus and another of the Virgin of Cobre These were relics of his wife Once there had been a tinted photograph of his wife on the wall but he had taken it down because it made him too lonely to see it and it was on the shelf in the corner under his clean shirt “What you have to eat?” the boy asked “A pot of yellow rice with fish Do you want some?” “No I will eat at home Do you want me to make the fire?” “No I will make it later on Or I may eat the rice cold.” “May I take the cast net?” “Of course.” There was no cast net and the boy remembered when they had sold it But they went through this fiction every day There was no pot of yellow rice and fish and the boy knew this too “Eighty-five is a lucky number,” the old man said “How would you like to see me bring one in that dressed out over a thousand pounds?” “I’ll get the cast net and go for sardines Will you sit in the sun in the doorway?” [16] “Yes I have yesterday’s paper and I will read the baseball.” The boy did not know whether yesterday’s paper was a fiction too But the old man brought it out from under the bed “Perico gave it t back when I have the sardines I’ll keep yours and mine together on ice and we can share them in the morning When I come back you can tell me about the baseball.” “The Yankees cannot lose.” “But I fear the Indians of Cleveland.” “Have faith in the Yankees my son Think of the great DiMaggio.” “I fear both the Tigers of Detroit and the Indians of Cleveland.” “Be careful or you will fear even the Reds of Cincinnati and the White Sax of Chicago.” “You study it and tell me when I come back.” “Do you think we should buy a terminal of the lottery with an eighty-five? Tomorrow is the eighty-fifth day.” “We can that,” the boy said “But what about the eighty-seven of your great record?” [17] “It could not happen twice Do you think you can find an eighty-five?” Ernest Hemingway The Old Man and the Sea “I can order one “One sheet That’s two dollars and a half Who can we borrow that from?” “That’s easy I can always borrow two dollars and a half.” “I think perhaps I can too But I try not to borrow First you borrow Then you beg.” “Keep warm old man,” the boy said “Remember we are in September.” “The month when the great fish come,” the old man said “Anyone can be a fisherman in May.” “I go now for the sardines,” the boy said When the boy came back the old man was asleep in the chair and the sun was down The boy took the over the back of the chair and over the old man’s shoulders They were strange shoulders, still powerful although very old, and the neck was still strong too and the creases did not show so much when the old man was asleep and his head fallen forward His shirt had been patched so many times that it was like the sail and the patches were faded to many different shades by the sun The [18] old man’s head was very old though and with his eyes closed there was no life in his face The newspaper lay across his knees and the weight of his arm held it there in the evening breeze He was barefooted The boy left him there and when he came back the old man was still asleep “Wake up old man,” the boy said and put his hand on one of the old man’s knees The old man opened his eyes and for a moment he was coming back from a long way away Then he smiled “What have you got?” he asked “Supper,” said the boy “We’re going to have supper.” “I’m not very hungry.” “Come on and eat You can’t fish and not eat.” “I have,” the old man said getting up and taking the newspaper and folding it Then he started to fold the blanket “Keep the blanket around you,” the boy said “You’ll not fish without eating while I’m alive.” “Then live a long time and take care of yourself,” the old man said “What are we eating?” “Black beans and rice, fried ba brought them in a two-decker metal container from the Terrace The two sets of knives and forks and spoons were in his pocket with a paper napkin wrapped around each set “Who gave this to you?” “Martin The owner.” “I must thank him.” “I thanked him already,” the boy said “You don’t need to thank him.” “I’ll give him the belly meat of a big fish,” the old man said “Has he done this for us more than once?” “I think so.” “I must give him something more than the belly meat then He is very thoughtful for us.” “He sent two beers.” “I like the beer in cans best.” “I know But this is in bottles, Hatuey beer, and I take back the bottles.” “That’s very kind of you,” the old man said “Should we eat?” “I’ve been asking you to,” the boy told him gently “I have not wished to open the container until you were ready.” [20] “I’m ready now,” the old man said “I only needed time to wash.” Where did you wash? the boy thought The village water supply was two streets down the road I must have water here for him, the boy thought, and soap and a good towel Why am I so Ernest Hemingway The Old Man and the Sea thoughtless? I must get him another shirt and a jacket for the winter and some sort of shoes and another blanket “Your stew is excellent,” the old man said “Tell me about the baseball,” the boy asked him “In the American League it is the Yan “They lost today,” the boy told him “That means nothing The great DiMaggio is himself again.” “They have other men on the team.” “Naturally But he makes the difference In the other league, between Brooklyn and Philadelphia I must take Brooklyn But then I think of Dick Sisler and those great drives In the old park.” “There was nothing ever like them He hits the longest ball I have ever seen.” “Do you remember when he used to come to the Terrace?” [21] “I wanted to take him fishing but I was too timid to ask him Then I asked you to ask him and you were too timid.” “I know It was a great mistake He might have gone with us Then we would have that for all of our lives.” “I would like to take the great DiMaggio fishing,” the old man said “They say his father was a fisherman Maybe he was as poor as we are and would understand.” “The great Sisler’s father was never poor and he, the father, was playing in the Big Leagues when he was my age.” “When I was your age I was before the mast on a square rigged ship that ran to Africa and I have seen lions on the beaches in the evening.” “I know You told me.” “Should we talk about Africa or about baseball?” “Baseball I think,” the boy said “Tell me about the great John J McGraw.” He said Jota for J “He used to come to the Terrace sometimes too in the older days But he was rough and drinking His mind was on horses as well as baseball At least he carried lists of [22] horses at all times in his pocket and frequently spoke the names of horses on the telephone.” “He was a great manager,” the boy said “My father thinks he was the greatest.” “Because he came here the most times,” the old man said “If Durocher had continued to come here each year your father would think him the greatest manager.” “Who is the greatest manager, really, Luque or Mike Gonzalez?” “I think they are equal.” “And the best fisherman is you.” “No I know others better.” “Que Va,” the boy said “There are many good fishermen and some great ones But there is only you.” “Thank you You make me happy I hope no fish will come along so great that he will prove us wrong.” “There is no such fish if you are still strong as you say.” “I may not be as strong as I think,” the old man said “But I know many tricks and I have resolution.” “You ought to go to bed now so that you will be fresh in the morning I will take the things back to the Terrace.” [23] “Good night then I will wake you in the morning.” “You’re my alarm clock,” the boy said Ernest Hemingway The Old Man and the Sea “Age is my alarm clock,” the old man said “Why old men wake so early? Is it to have one longer day?” “I don’t know,” the boy said “All I know is that young boys sleep la man said “I’ll waken you in time.” “I not like for him to waken me It is as though I were inferior.” “I know.” “Sleep well old man.” The boy went out They had eaten with no light on the table and the old man took off his trousers and went to bed in the dark He rolled his trousers up to make a pillow, putting the newspaper inside them He rolled himself in the blanket and slept on the other old newspapers that covered the springs of the bed He was asleep in a short time and he dreamed of Africa when he was a boy and the long golden beaches and the white beaches, so white they hurt your eyes, and the high capes and the great brown mountains He lived along that coast now every night and in his dreams he heard the surf roar and saw the native boats [24] come riding through it He smelled the tar and oakum of the deck as he slept and he smelled the smell of Africa that the land breeze brought at morning Usually when he smelled the land breeze he woke up and dressed to go and wake the boy But tonight the smell of the land breeze came very early and he knew it was too early in his dream and went on dreaming to see the white peaks of the Islands rising from the sea and then he dreamed of the different harbours and roadsteads of the Canary Islands He no longer dreamed of storms, nor of women, nor of great occurrences, n strength, nor of his wife He only dreamed of places now and of the lions on the beach They played like young cats in the dusk and he loved them as he loved the boy He never dreamed about the boy He simply woke, looked out the open door at the moon and unrolled his trousers and put them on He urinated outside the shack and then went up the road to wake the boy He was shivering with the morning cold But he knew he would shiver himself warm and that soon he would be rowing The door of the house where the boy lived was unlocked and he opened it and walked in quietly with his [25] bare feet The boy was asleep on a cot in the first room and the old man could see him clearly with the light that came in from the dying moon He took hold of one foot gently and held it until the boy woke and turned and looked at him The old man nodded and the boy took his trousers from the chair by the bed and, sitting on the bed, pulled them on The old man went out the door and the boy came after him He was sleepy and the old man put his arm across his shoulders and said, “I am sorry.” “Qua Va,” the boy said “It is what a man must do.” They walked down the road to the old man’s shack and all along the road, in the dark, barefoot men were moving, carrying the masts of their boats When they reached the old man’s shack the boy harpoon and gaff and the old man carried the mast with the furled sail on his shoulder “Do you want coffee?” the boy asked “We’ll put the gear in the boat and then get some.” They had coffee from condensed milk cans at an early morning place that served fishermen “How did you sleep old man?” the boy asked He [26] was waking up now although it was still hard for him to leave his sleep “Very well, Manolin,” the old man said “I feel confident today.” “So I,” the boy said “Now I must get your sardines and mine and your fresh baits He brings our gear himself He never wants anyone to carry anything.” “We’re different,” the old man said “I let you carry things when you were five years old.” - Mạng P2P có cấu trúc sử dụng bảng băm phân tán (Distributed Hash Table hay DHT) để tạo định danh cho peer tài nguyên, cho peer lưu trữ danh sách tài nguyên định danh peer tài nguyên nằm không gian định danh Một peer khai thác tài nguyên mạng cách gửi truy vấn đến peer bảng định tuyến, peer chuyển ếp truy vấn đến peer có lưu trữ tài nguyên cách nh toán định danh tài nguyên định danh peer, từ peer lưu trữ tài nguyên phản hồi cho peer m kiếm để kết nối trực ếp sử dụng tài ngun Các mạng P2P có cấu trúc điển hình bao gồm CAN (Ratnasamy cộng sự; Chord, 2001; Kademlia, 2002) - Mạng P2P khơng có cấu trúc lưu trữ danh sách tài nguyên peer Một peer khai thác tài nguyên mạng cách gửi truy vấn đến peer lân cận, peer chuyển ếp truy vấn đến peer khác mạng Các peer lưu trữ tài nguyên phản hồi thông n họ cho peer m kiếm để kết nối trực ếp sử dụng tài ngun Các mạng P2P khơng có cấu trúc điển hình bao gồm Gnutella, BitTorrent Ngồi ra, mạng P2P với siêu peer mạng lai kết hợp đặc điểm mạng P2P với mạng máy trạm-máy chủ để giải vấn đề peer có lực nh tốn khơng đồng đều, tức peer có khả lưu trữ, băng thơng sức mạnh xử lý khác Nghiên cứu Yang cộng trình bày thiết kế mạng P2P với siêu peer để tận dụng lực siêu peer Mạng P2P bao gồm nhiều cụm kết nối với để tạo thành mạng P2P có cấu trúc khơng có cấu trúc, cụm chứa siêu peer máy trạm Các máy trạm gửi truy vấn đến, nhận phản hồi, từ siêu peer cụm, siêu peer chuyển ếp truy vấn nhận phản hồi mạng P2P với siêu peer Công ty Uber gần thành công việc tận dụng tảng công nghệ mơ hình kinh tế chia sẻ Mơ hình Uber cung cấp không gian ảo để kết nối người dùng cung cấp m kiếm chuyến Khác với dịch vụ taxi truyền thống, công ty Uber sở hữu tảng cơng nghệ mà khơng có xe taxi Người dùng sử dụng ứng dụng di động công ty Uber cung cấp để yêu cầu đặt xe Ứng dụng liên lạc với dịch vụ Uber để nhận đề nghị thích hợp Dịch vụ Uber thu thập thơng n thời gian thực phương ện, m kiếm ưu đãi phù hợp cho người dùng chuyển yêu cầu đến tài xế để liên hệ với người dùng sử dụng dịch vụ Ứng dụng cung cấp thông n chi ết vị trí người dùng phương ện, giá tuyến đường Người dùng đánh giá chất lượng dịch vụ trực ếp ứng dụng Mơ hình này, mức độ đó, giống với mơ hình kiến trúc P2P, người dùng tài xế đóng vai trị peer trung tâm liệu phục vụ mục đích đăng ký quản lý Mơ hình tạo điều kiện cho việc cung cấp dịch vụ P2P (Sundararajan, 2014), đồng thời nhiều ứng dụng kinh tế chia sẻ có chung thiết kế với Uber Journal of Science - Hong Bang Interna onal University ISSN: 2615 - 9686 He was an old man who fished alone in a skiff in the Gulf Stream and he had gone eighty-four days now without taking a fish In the first forty days a boy had been with him But after forty days without a fish the boy’s parents had told him that the old man was now definitely and finally salao, which is the worst form of unlucky, and the boy had gone at their orders in another boat which caught three good fish the first week It made the boy sad to see the old man come in each day with his skiff empty and he always went down to help him carry either the coiled lines or the gaff and harpoon and the sail that was furled around the mast The sail was patched with flour sacks and, furled, it looked like the flag of permanent defeat The old man was thin and gaunt with deep wrinkles in the back of his neck The brown blotches of the benevolent skin cancer the sun brings from its [9] reflection on the tropic sea were on his cheeks The blotches ran well down the sides of his face and his hands had the deep-creased scars from handling heavy fish on the cords But none of these scars were fresh They were as old as erosions in a fishless desert Everything about him was old except his eyes and they were the same color as the sea and were cheerful and undefeated “Santiago,” the boy said to him as they climbed the bank from where the skiff w Tạp chí KHOA HỌC - Trường Đại học Quốc tế Hồng Bàng Số 14 - 01/2021: 1-12 We’ve made some money.” The old man had taught the boy to fish and the boy loved him “No,” the old man said “You’re with a lucky boat Stay with them.” “But remember how you went eighty-seven days without fish and then we caught big ones every day for three weeks.” “I remember,” the old man said “I know you did not leave me because you doubted.” “It was papa made me leave I am a boy and I must obey him.” “I know,” the old man said “It is quite normal.” “He hasn’t much faith.” [10] “No,” the old man said “But we have Haven’t we?” ‘Yes,” the boy said “Can I offer you a beer on the Terrace and then we’ll take the stuff home.” “Why not?” the old man said “Between fishermen.” They sat on the Terrace and many of the fishermen made fun of the old man and he was not angry Others, of the older fishermen, looked at him and were sad But they did not show it and they spoke politely about the current and the depths they had drifted their lines at and the steady good weather and of what they had seen The successful fishermen of that day were already in and had butchered their marlin out and carried them laid full length across two planks, with two men Ernest Hemingway The Old Man and the Sea staggering at the end of each plank, to the fish house where they waited for the ice truck to carry them to the market in Ha taken them to the shark factory on the other side of the cove where they were hoisted on a block and tackle, their livers removed, their fins cut off and their hides skinned out and their flesh cut into strips for salting When the wind was in the east a smell came across the harbour from the shark factory; but today there [11] was only the faint edge of the odour because the wind had backed into the north and then dropped off and it was pleasant and sunny on the Terrace “Santiago,” the boy said “Yes,” the old man said He was holding his glass and thinking of many years ago “Can I go out to get sardines for you for tomorrow?” “No Go and play baseball I can still row and Rogelio will throw the net.” “I would like to go If I cannot fish with you I would like to serve in some way.” “You bought me a beer,” the old man said “You are already a man.” “How old was I when you first took me in a boat?” “Five and you nearly were killed when I brought the fish in too green and he nearly tore the boat to pieces Can you remember?” “I can remember the tail slapping and banging and the thwart breaking and the noise of the clubbing I can remember you throwing me into the bow where the wet coiled lines were and feeling the whole boat shiver and the noise of you clubbing him like chopping a tree down and the sweet blood smell all over me.” [12] “Can it to you?” “I remember everything from when we first went together.” The old man looked at him with his sun-burned, confident loving eyes “If you were my boy I’d take you out and gamble,” he said “But you are your father’s and your mother’s and you are in a lucky boat.” “May I get the sardines? I know where I can get four baits too.” “I have mine left from today I put them in salt in the box.” “Let me get four fresh ones.” “One,” the old man said His hope and his confidence had never gone But now they were freshening as when the breeze rises “Two,” the boy said “Two,” the old man agreed “You didn’t steal them?” “I would,” the boy said “But I bought these.” “Thank you,” the old man said He was too simple to wonder when he had attained humility But he [13] knew he had attained it and he knew it was not disgraceful and it carried no loss of true pride “Tomorrow is going to be a good day with this current,” he said “Where are you going?” the boy asked “Far out to come in when the wind shifts I want to be out before it is light.” “I’ll try to get him to work far out,” the boy said “Then if you hook something truly big we can come to your aid.” “He does not like to work too far out.” “No,” the boy said “But I will see something that he cannot see such as a bird working and get him to come out after dolphin.” “Are his eyes that bad?” “He is said “He never went turtle-ing That is what kills the eyes.” “But you went turtle-ing for years off the Mosquito Coast and your eyes are good.” Ernest Hemingway The Old Man and the Sea “I am a strange old man” “But are you strong enough now for a truly big fish?” “I think so And there are many tricks.” [14] “Let us take the stuff home,” the boy said “So I can get the cast net and go after the sardines.” They picked up the gear from the boat The old man carried the mast on his shoulder and the boy carried the wooden boat with the coiled, hard-braided brown lines, the gaff and the harpoon with its shaft The box with the baits was under the stern of the skiff along with the club that was used to subdue the big fish when they were brought alongside No one would steal from the old man but it was better to take the sail and the heavy lines home as the dew was bad for them and, though he was quite sure no local people would steal from him, the old man thought that a gaff and a harpoon were needless temptations to leave in a boat They walked up the road together to the old man’s shack and went in through its open door The old man leaned the mast with its wrapped sail against the wall and the boy put the box and the other gear beside it The mast was nearly as long as the one room of the shack The shack was made of the toug called guano and in it there was a bed, a table, one chair, and a place on the dirt floor to cook with charcoal On the brown walls of the flattened, overlapping leaves of the sturdy fibered [15] guano there was a picture in color of the Sacred Heart of Jesus and another of the Virgin of Cobre These were relics of his wife Once there had been a tinted photograph of his wife on the wall but he had taken it down because it made him too lonely to see it and it was on the shelf in the corner under his clean shirt “What you have to eat?” the boy asked “A pot of yellow rice with fish Do you want some?” “No I will eat at home Do you want me to make the fire?” “No I will make it later on Or I may eat the rice cold.” “May I take the cast net?” “Of course.” There was no cast net and the boy remembered when they had sold it But they went through this fiction every day There was no pot of yellow rice and fish and the boy knew this too “Eighty-five is a lucky number,” the old man said “How would you like to see me bring one in that dressed out over a thousand pounds?” “I’ll get the cast net and go for sardines Will you sit in the sun in the doorway?” [16] “Yes I have yesterday’s paper and I will read the baseball.” The boy did not know whether yesterday’s paper was a fiction too But the old man brought it out from under the bed “Perico gave it t back when I have the sardines I’ll keep yours and mine together on ice and we can share them in the morning When I come back you can tell me about the baseball.” “The Yankees cannot lose.” “But I fear the Indians of Cleveland.” “Have faith in the Yankees my son Think of the great DiMaggio.” “I fear both the Tigers of Detroit and the Indians of Cleveland.” “Be careful or you will fear even the Reds of Cincinnati and the White Sax of Chicago.” “You study it and tell me when I come back.” “Do you think we should buy a terminal of the lottery with an eighty-five? Tomorrow is the eighty-fifth day.” “We can that,” the boy said “But what about the eighty-seven of your great record?” [17] “It could not happen twice Do you think you can find an eighty-five?” Ernest Hemingway The Old Man and the Sea “I can order one “One sheet That’s two dollars and a half Who can we borrow that from?” “That’s easy I can always borrow two dollars and a half.” “I think perhaps I can too But I try not to borrow First you borrow Then you beg.” “Keep warm old man,” the boy said “Remember we are in September.” “The month when the great fish come,” the old man said “Anyone can be a fisherman in May.” “I go now for the sardines,” the boy said When the boy came back the old man was asleep in the chair and the sun was down The boy took the over the back of the chair and over the old man’s shoulders They were strange shoulders, still powerful although very old, and the neck was still strong too and the creases did not show so much when the old man was asleep and his head fallen forward His shirt had been patched so many times that it was like the sail and the patches were faded to many different shades by the sun The [18] old man’s head was very old though and with his eyes closed there was no life in his face The newspaper lay across his knees and the weight of his arm held it there in the evening breeze He was barefooted The boy left him there and when he came back the old man was still asleep “Wake up old man,” the boy said and put his hand on one of the old man’s knees The old man opened his eyes and for a moment he was coming back from a long way away Then he smiled “What have you got?” he asked “Supper,” said the boy “We’re going to have supper.” “I’m not very hungry.” “Come on and eat You can’t fish and not eat.” “I have,” the old man said getting up and taking the newspaper and folding it Then he started to fold the blanket “Keep the blanket around you,” the boy said “You’ll not fish without eating while I’m alive.” “Then live a long time and take care of yourself,” the old man said “What are we eating?” “Black beans and rice, fried ba brought them in a two-decker metal container from the Terrace The two sets of knives and forks and spoons were in his pocket with a paper napkin wrapped around each set “Who gave this to you?” “Martin The owner.” “I must thank him.” “I thanked him already,” the boy said “You don’t need to thank him.” “I’ll give him the belly meat of a big fish,” the old man said “Has he done this for us more than once?” “I think so.” “I must give him something more than the belly meat then He is very thoughtful for us.” “He sent two beers.” “I like the beer in cans best.” “I know But this is in bottles, Hatuey beer, and I take back the bottles.” “That’s very kind of you,” the old man said “Should we eat?” “I’ve been asking you to,” the boy told him gently “I have not wished to open the container until you were ready.” [20] “I’m ready now,” the old man said “I only needed time to wash.” Where did you wash? the boy thought The village water supply was two streets down the road I must have water here for him, the boy thought, and soap and a good towel Why am I so Ernest Hemingway The Old Man and the Sea thoughtless? I must get him another shirt and a jacket for the winter and some sort of shoes and another blanket “Your stew is excellent,” the old man said “Tell me about the baseball,” the boy asked him “In the American League it is the Yan “They lost today,” the boy told him “That means nothing The great DiMaggio is himself again.” “They have other men on the team.” “Naturally But he makes the difference In the other league, between Brooklyn and Philadelphia I must take Brooklyn But then I think of Dick Sisler and those great drives In the old park.” “There was nothing ever like them He hits the longest ball I have ever seen.” “Do you remember when he used to come to the Terrace?” [21] “I wanted to take him fishing but I was too timid to ask him Then I asked you to ask him and you were too timid.” “I know It was a great mistake He might have gone with us Then we would have that for all of our lives.” “I would like to take the great DiMaggio fishing,” the old man said “They say his father was a fisherman Maybe he was as poor as we are and would understand.” “The great Sisler’s father was never poor and he, the father, was playing in the Big Leagues when he was my age.” “When I was your age I was before the mast on a square rigged ship that ran to Africa and I have seen lions on the beaches in the evening.” “I know You told me.” “Should we talk about Africa or about baseball?” “Baseball I think,” the boy said “Tell me about the great John J McGraw.” He said Jota for J “He used to come to the Terrace sometimes too in the older days But he was rough and drinking His mind was on horses as well as baseball At least he carried lists of [22] horses at all times in his pocket and frequently spoke the names of horses on the telephone.” “He was a great manager,” the boy said “My father thinks he was the greatest.” “Because he came here the most times,” the old man said “If Durocher had continued to come here each year your father would think him the greatest manager.” “Who is the greatest manager, really, Luque or Mike Gonzalez?” “I think they are equal.” “And the best fisherman is you.” “No I know others better.” “Que Va,” the boy said “There are many good fishermen and some great ones But there is only you.” “Thank you You make me happy I hope no fish will come along so great that he will prove us wrong.” “There is no such fish if you are still strong as you say.” “I may not be as strong as I think,” the old man said “But I know many tricks and I have resolution.” “You ought to go to bed now so that you will be fresh in the morning I will take the things back to the Terrace.” [23] “Good night then I will wake you in the morning.” “You’re my alarm clock,” the boy said Ernest Hemingway The Old Man and the Sea “Age is my alarm clock,” the old man said “Why old men wake so early? Is it to have one longer day?” “I don’t know,” the boy said “All I know is that young boys sleep la man said “I’ll waken you in time.” “I not like for him to waken me It is as though I were inferior.” “I know.” “Sleep well old man.” The boy went out They had eaten with no light on the table and the old man took off his trousers and went to bed in the dark He rolled his trousers up to make a pillow, putting the newspaper inside them He rolled himself in the blanket and slept on the other old newspapers that covered the springs of the bed He was asleep in a short time and he dreamed of Africa when he was a boy and the long golden beaches and the white beaches, so white they hurt your eyes, and the high capes and the great brown mountains He lived along that coast now every night and in his dreams he heard the surf roar and saw the native boats [24] come riding through it He smelled the tar and oakum of the deck as he slept and he smelled the smell of Africa that the land breeze brought at morning Usually when he smelled the land breeze he woke up and dressed to go and wake the boy But tonight the smell of the land breeze came very early and he knew it was too early in his dream and went on dreaming to see the white peaks of the Islands rising from the sea and then he dreamed of the different harbours and roadsteads of the Canary Islands He no longer dreamed of storms, nor of women, nor of great occurrences, n strength, nor of his wife He only dreamed of places now and of the lions on the beach They played like young cats in the dusk and he loved them as he loved the boy He never dreamed about the boy He simply woke, looked out the open door at the moon and unrolled his trousers and put them on He urinated outside the shack and then went up the road to wake the boy He was shivering with the morning cold But he knew he would shiver himself warm and that soon he would be rowing The door of the house where the boy lived was unlocked and he opened it and walked in quietly with his [25] bare feet The boy was asleep on a cot in the first room and the old man could see him clearly with the light that came in from the dying moon He took hold of one foot gently and held it until the boy woke and turned and looked at him The old man nodded and the boy took his trousers from the chair by the bed and, sitting on the bed, pulled them on The old man went out the door and the boy came after him He was sleepy and the old man put his arm across his shoulders and said, “I am sorry.” “Qua Va,” the boy said “It is what a man must do.” They walked down the road to the old man’s shack and all along the road, in the dark, barefoot men were moving, carrying the masts of their boats When they reached the old man’s shack the boy harpoon and gaff and the old man carried the mast with the furled sail on his shoulder “Do you want coffee?” the boy asked “We’ll put the gear in the boat and then get some.” They had coffee from condensed milk cans at an early morning place that served fishermen “How did you sleep old man?” the boy asked He [26] was waking up now although it was still hard for him to leave his sleep “Very well, Manolin,” the old man said “I feel confident today.” “So I,” the boy said “Now I must get your sardines and mine and your fresh baits He brings our gear himself He never wants anyone to carry anything.” “We’re different,” the old man said “I let you carry things when you were five years old.” Hình Mơ hình taxi truyền thống (bên trái); Mơ hình taxi Uber (bên phải) MƠ HÌNH C2C PHÂN TÁN Các ứng dụng Craigslist (1995) eBay (1995) ên phong mơ hình C2C với chợ trực tuyến, đấu giá trực tuyến từ sớm Internet phát triển Cần có tảng ứng dụng mạng phục vụ chợ trực tuyến cho người mua người bán, người bán đăng sản phẩm rao bán trực tuyến, người mua m kiếm sản phẩm trực tuyến nhận quảng cáo sản phẩm từ người bán thông qua giao dịch gián ếp Trong mơ Hình 3, máy chủ tập trung đóng vai trị quan trọng việc kết nối người mua người bán Các máy chủ cung cấp chế trung gian để thực giao dịch nhằm đảm bảo kiểm soát chất lượng, nghĩa là, sau người mua người bán đồng ý giao dịch sản phẩm, người mua chuyển ền cho công ty trung gian, người bán gửi sản phẩm cho người mua, sau người bán nhận ền từ cơng ty khơng có khiếu nại từ người mua Máy chủ phải mạnh nh toán, lưu trữ, băng thông cập nhật công nghệ để giữ cho dịch vụ mua bán hoạt động hiệu Mơ hình coi mơ hình C2C tập trung phụ thuộc vào máy chủ tập trung, tương tự mạng P2P tập trung Hình Mơ hình thương mại điện tử C2C có kiến trúc tập trung Mơ hình C2C có kiến trúc phân tán cho phép người mua người bán thực mua bán sản phẩm thông qua giao dịch trực ếp Một số máy chủ tập trung dùng để khởi tạo mạng P2P người bán người mua đồng thời phục vụ việc đánh giá chất lượng giao dịch Trên mạng này, người bán người mua chủ động tham gia rời đi, m kiếm sản phẩm thực giao dịch mua bán thông qua ứng dụng P2P vận hành máy nh thiết bị di động Động lực tạo mơ hình đến từ hoạt động mua bán trực tuyến Facebook; đó, người bán quảng cáo sản phẩm trang cá nhân họ, người mua m kiếm sản phẩm phù hợp, sau giao dịch diễn trực ếp người bán người mua mà không cần tham gia ISSN: 2615 - 9686 Journal of Science - Hong Bang Interna onal University He was an old man who fished alone in a skiff in the Gulf Stream and he had gone eighty-four days now without taking a fish In the first forty days a boy had been with him But after forty days without a fish the boy’s parents had told him that the old man was now definitely and finally salao, which is the worst form of unlucky, and the boy had gone at their orders in another boat which caught three good fish the first week It made the boy sad to see the old man come in each day with his skiff empty and he always went down to help him carry either the coiled lines or the gaff and harpoon and the sail that was furled around the mast The sail was patched with flour sacks and, furled, it looked like the flag of permanent defeat The old man was thin and gaunt with deep wrinkles in the back of his neck The brown blotches of the benevolent skin cancer the sun brings from its [9] reflection on the tropic sea were on his cheeks The blotches ran well down the sides of his face and his hands had the deep-creased scars from handling heavy fish on the cords But none of these scars were fresh They were as old as erosions in a fishless desert Everything about him was old except his eyes and they were the same color as the sea and were cheerful and undefeated “Santiago,” the boy said to him as they climbed the bank from where the skiff w Tạp chí KHOA HỌC - Trường Đại học Quốc tế Hồng Bàng Số 14 - 01/2021: 1-12 We’ve made some money.” The old man had taught the boy to fish and the boy loved him “No,” the old man said “You’re with a lucky boat Stay with them.” “But remember how you went eighty-seven days without fish and then we caught big ones every day for three weeks.” “I remember,” the old man said “I know you did not leave me because you doubted.” “It was papa made me leave I am a boy and I must obey him.” “I know,” the old man said “It is quite normal.” “He hasn’t much faith.” [10] “No,” the old man said “But we have Haven’t we?” ‘Yes,” the boy said “Can I offer you a beer on the Terrace and then we’ll take the stuff home.” “Why not?” the old man said “Between fishermen.” They sat on the Terrace and many of the fishermen made fun of the old man and he was not angry Others, of the older fishermen, looked at him and were sad But they did not show it and they spoke politely about the current and the depths they had drifted their lines at and the steady good weather and of what they had seen The successful fishermen of that day were already in and had butchered their marlin out and carried them laid full length across two planks, with two men Ernest Hemingway The Old Man and the Sea staggering at the end of each plank, to the fish house where they waited for the ice truck to carry them to the market in Ha taken them to the shark factory on the other side of the cove where they were hoisted on a block and tackle, their livers removed, their fins cut off and their hides skinned out and their flesh cut into strips for salting When the wind was in the east a smell came across the harbour from the shark factory; but today there [11] was only the faint edge of the odour because the wind had backed into the north and then dropped off and it was pleasant and sunny on the Terrace “Santiago,” the boy said “Yes,” the old man said He was holding his glass and thinking of many years ago “Can I go out to get sardines for you for tomorrow?” “No Go and play baseball I can still row and Rogelio will throw the net.” “I would like to go If I cannot fish with you I would like to serve in some way.” “You bought me a beer,” the old man said “You are already a man.” “How old was I when you first took me in a boat?” “Five and you nearly were killed when I brought the fish in too green and he nearly tore the boat to pieces Can you remember?” “I can remember the tail slapping and banging and the thwart breaking and the noise of the clubbing I can remember you throwing me into the bow where the wet coiled lines were and feeling the whole boat shiver and the noise of you clubbing him like chopping a tree down and the sweet blood smell all over me.” [12] “Can it to you?” “I remember everything from when we first went together.” The old man looked at him with his sun-burned, confident loving eyes “If you were my boy I’d take you out and gamble,” he said “But you are your father’s and your mother’s and you are in a lucky boat.” “May I get the sardines? I know where I can get four baits too.” “I have mine left from today I put them in salt in the box.” “Let me get four fresh ones.” “One,” the old man said His hope and his confidence had never gone But now they were freshening as when the breeze rises “Two,” the boy said “Two,” the old man agreed “You didn’t steal them?” “I would,” the boy said “But I bought these.” “Thank you,” the old man said He was too simple to wonder when he had attained humility But he [13] knew he had attained it and he knew it was not disgraceful and it carried no loss of true pride “Tomorrow is going to be a good day with this current,” he said “Where are you going?” the boy asked “Far out to come in when the wind shifts I want to be out before it is light.” “I’ll try to get him to work far out,” the boy said “Then if you hook something truly big we can come to your aid.” “He does not like to work too far out.” “No,” the boy said “But I will see something that he cannot see such as a bird working and get him to come out after dolphin.” “Are his eyes that bad?” “He is Facebook Facebook tảng “tự phát” cho mơ hình C2C có kiến trúc phân tán, nghĩa là, hoạt động giao dịch mua bán diễn trực ếp người mua người bán Tuy nhiên, nhược điểm tảng phụ thuộc vào máy chủ Facebook, khả m kiếm hạn chế, tốn phí quảng cáo,v.v tham gia rời cách chủ động Các máy chủ tập trung sử dụng cho mục đích khởi tạo mạng P2P đánh giá người dùng Vì khơng có máy chủ tập trung, người bán quảng cáo sản phẩm họ tham gia kết nối trực tuyến Mạng cung cấp chế m kiếm linh hoạt cho phép người mua m kiếm sản phẩm danh sách sản phẩm tất người bán kết nối Mơ hình loại bỏ cơng ty trung gian, chi phí giảm nhiều so với mơ hình Tuy nhiên, mơ hình gặp phải số hạn chế từ mạng P2P khơng có cấu trúc, ví dụ khả mở rộng m kiếm, nh không đồng khả peer, độ n cậy an toàn peer, v.v said “He never went turtle-ing That is what kills the eyes.” “But you went turtle-ing for years off the Mosquito Coast and your eyes are good.” Ernest Hemingway The Old Man and the Sea “I am a strange old man” “But are you strong enough now for a truly big fish?” “I think so And there are many tricks.” [14] “Let us take the stuff home,” the boy said “So I can get the cast net and go after the sardines.” They picked up the gear from the boat The old man carried the mast on his shoulder and the boy carried the wooden boat with the coiled, hard-braided brown lines, the gaff and the harpoon with its shaft The box with the baits was under the stern of the skiff along with the club that was used to subdue the big fish when they were brought alongside No one would steal from the old man but it was better to take the sail and the heavy lines home as the dew was bad for them and, though he was quite sure no local people would steal from him, the old man thought that a gaff and a harpoon were needless temptations to leave in a boat They walked up the road together to the old man’s shack and went in through its open door The old man leaned the mast with its wrapped sail against the wall and the boy put the box and the other gear beside it The mast was nearly as long as the one room of the shack The shack was made of the toug called guano and in it there was a bed, a table, one chair, and a place on the dirt floor to cook with charcoal On the brown walls of the flattened, overlapping leaves of the sturdy fibered [15] guano there was a picture in color of the Sacred Heart of Jesus and another of the Virgin of Cobre These were relics of his wife Once there had been a tinted photograph of his wife on the wall but he had taken it down because it made him too lonely to see it and it was on the shelf in the corner under his clean shirt “What you have to eat?” the boy asked “A pot of yellow rice with fish Do you want some?” “No I will eat at home Do you want me to make the fire?” “No I will make it later on Or I may eat the rice cold.” “May I take the cast net?” “Of course.” There was no cast net and the boy remembered when they had sold it But they went through this fiction every day There was no pot of yellow rice and fish and the boy knew this too “Eighty-five is a lucky number,” the old man said “How would you like to see me bring one in that dressed out over a thousand pounds?” “I’ll get the cast net and go for sardines Will you sit in the sun in the doorway?” [16] “Yes I have yesterday’s paper and I will read the baseball.” The boy did not know whether yesterday’s paper was a fiction too But the old man brought it out from under the bed “Perico gave it t back when I have the sardines I’ll keep yours and mine together on ice and we can share them in the morning When I come back you can tell me about the baseball.” “The Yankees cannot lose.” “But I fear the Indians of Cleveland.” “Have faith in the Yankees my son Think of the great DiMaggio.” “I fear both the Tigers of Detroit and the Indians of Cleveland.” “Be careful or you will fear even the Reds of Cincinnati and the White Sax of Chicago.” “You study it and tell me when I come back.” “Do you think we should buy a terminal of the lottery with an eighty-five? Tomorrow is the eighty-fifth day.” “We can that,” the boy said “But what about the eighty-seven of your great record?” [17] “It could not happen twice Do you think you can find an eighty-five?” Ernest Hemingway The Old Man and the Sea “I can order one “One sheet That’s two dollars and a half Who can we borrow that from?” “That’s easy I can always borrow two dollars and a half.” “I think perhaps I can too But I try not to borrow First you borrow Then you beg.” “Keep warm old man,” the boy said “Remember we are in September.” “The month when the great fish come,” the old man said “Anyone can be a fisherman in May.” “I go now for the sardines,” the boy said When the boy came back the old man was asleep in the chair and the sun was down The boy took the over the back of the chair and over the old man’s shoulders They were strange shoulders, still powerful although very old, and the neck was still strong too and the creases did not show so much when the old man was asleep and his head fallen forward His shirt had been patched so many times that it was like the sail and the patches were faded to many different shades by the sun The [18] old man’s head was very old though and with his eyes closed there was no life in his face The newspaper lay across his knees and the weight of his arm held it there in the evening breeze He was barefooted The boy left him there and when he came back the old man was still asleep “Wake up old man,” the boy said and put his hand on one of the old man’s knees The old man opened his eyes and for a moment he was coming back from a long way away Then he smiled “What have you got?” he asked “Supper,” said the boy “We’re going to have supper.” “I’m not very hungry.” “Come on and eat You can’t fish and not eat.” “I have,” the old man said getting up and taking the newspaper and folding it Then he started to fold the blanket “Keep the blanket around you,” the boy said “You’ll not fish without eating while I’m alive.” “Then live a long time and take care of yourself,” the old man said “What are we eating?” “Black beans and rice, fried ba brought them in a two-decker metal container from the Terrace The two sets of knives and forks and spoons were in his pocket with a paper napkin wrapped around each set “Who gave this to you?” “Martin The owner.” “I must thank him.” “I thanked him already,” the boy said “You don’t need to thank him.” “I’ll give him the belly meat of a big fish,” the old man said “Has he done this for us more than once?” “I think so.” “I must give him something more than the belly meat then He is very thoughtful for us.” “He sent two beers.” “I like the beer in cans best.” “I know But this is in bottles, Hatuey beer, and I take back the bottles.” “That’s very kind of you,” the old man said “Should we eat?” “I’ve been asking you to,” the boy told him gently “I have not wished to open the container until you were ready.” [20] “I’m ready now,” the old man said “I only needed time to wash.” Where did you wash? the boy thought The village water supply was two streets down the road I must have water here for him, the boy thought, and soap and a good towel Why am I so Ernest Hemingway The Old Man and the Sea thoughtless? I must get him another shirt and a jacket for the winter and some sort of shoes and another blanket “Your stew is excellent,” the old man said “Tell me about the baseball,” the boy asked him “In the American League it is the Yan “They lost today,” the boy told him “That means nothing The great DiMaggio is himself again.” “They have other men on the team.” “Naturally But he makes the difference In the other league, between Brooklyn and Philadelphia I must take Brooklyn But then I think of Dick Sisler and those great drives In the old park.” “There was nothing ever like them He hits the longest ball I have ever seen.” “Do you remember when he used to come to the Terrace?” [21] “I wanted to take him fishing but I was too timid to ask him Then I asked you to ask him and you were too timid.” “I know It was a great mistake He might have gone with us Then we would have that for all of our lives.” “I would like to take the great DiMaggio fishing,” the old man said “They say his father was a fisherman Maybe he was as poor as we are and would understand.” “The great Sisler’s father was never poor and he, the father, was playing in the Big Leagues when he was my age.” “When I was your age I was before the mast on a square rigged ship that ran to Africa and I have seen lions on the beaches in the evening.” “I know You told me.” “Should we talk about Africa or about baseball?” “Baseball I think,” the boy said “Tell me about the great John J McGraw.” He said Jota for J “He used to come to the Terrace sometimes too in the older days But he was rough and drinking His mind was on horses as well as baseball At least he carried lists of [22] horses at all times in his pocket and frequently spoke the names of horses on the telephone.” “He was a great manager,” the boy said “My father thinks he was the greatest.” “Because he came here the most times,” the old man said “If Durocher had continued to come here each year your father would think him the greatest manager.” “Who is the greatest manager, really, Luque or Mike Gonzalez?” “I think they are equal.” “And the best fisherman is you.” “No I know others better.” “Que Va,” the boy said “There are many good fishermen and some great ones But there is only you.” “Thank you You make me happy I hope no fish will come along so great that he will prove us wrong.” “There is no such fish if you are still strong as you say.” “I may not be as strong as I think,” the old man said “But I know many tricks and I have resolution.” “You ought to go to bed now so that you will be fresh in the morning I will take the things back to the Terrace.” [23] “Good night then I will wake you in the morning.” “You’re my alarm clock,” the boy said Ernest Hemingway The Old Man and the Sea “Age is my alarm clock,” the old man said “Why old men wake so early? Is it to have one longer day?” “I don’t know,” the boy said “All I know is that young boys sleep la man said “I’ll waken you in time.” “I not like for him to waken me It is as though I were inferior.” “I know.” “Sleep well old man.” The boy went out They had eaten with no light on the table and the old man took off his trousers and went to bed in the dark He rolled his trousers up to make a pillow, putting the newspaper inside them He rolled himself in the blanket and slept on the other old newspapers that covered the springs of the bed He was asleep in a short time and he dreamed of Africa when he was a boy and the long golden beaches and the white beaches, so white they hurt your eyes, and the high capes and the great brown mountains He lived along that coast now every night and in his dreams he heard the surf roar and saw the native boats [24] come riding through it He smelled the tar and oakum of the deck as he slept and he smelled the smell of Africa that the land breeze brought at morning Usually when he smelled the land breeze he woke up and dressed to go and wake the boy But tonight the smell of the land breeze came very early and he knew it was too early in his dream and went on dreaming to see the white peaks of the Islands rising from the sea and then he dreamed of the different harbours and roadsteads of the Canary Islands He no longer dreamed of storms, nor of women, nor of great occurrences, n Chúng tơi đề xuất mơ hình C2C có kiến trúc phân tán dựa mạng P2P khơng có cấu trúc Mơ hình tận dụng đặc điểm đáng ý mạng P2P khơng có cấu trúc Hình Người mua người bán hoạt động peer mạng này; peer trực ếp kết nối giao dịch mua bán sản phẩm với mà không cần máy chủ tập trung; đồng thời mạng tự quản lý peer strength, nor of his wife He only dreamed of places now and of the lions on the beach They played like young cats in the dusk and he loved them as he loved the boy He never dreamed about the boy He simply woke, looked out the open door at the moon and unrolled his trousers and put them on He urinated outside the shack and then went up the road to wake the boy He was shivering with the morning cold But he knew he would shiver himself warm and that soon he would be rowing The door of the house where the boy lived was unlocked and he opened it and walked in quietly with his [25] bare feet The boy was asleep on a cot in the first room and the old man could see him clearly with the light that came in from the dying moon He took hold of one foot gently and held it until the boy woke and turned and looked at him The old man nodded and the boy took his trousers from the chair by the bed and, sitting on the bed, pulled them on The old man went out the door and the boy came after him He was sleepy and the old man put his arm across his shoulders and said, “I am sorry.” “Qua Va,” the boy said “It is what a man must do.” They walked down the road to the old man’s shack and all along the road, in the dark, barefoot men were moving, carrying the masts of their boats When they reached the old man’s shack the boy harpoon and gaff and the old man carried the mast with the furled sail on his shoulder “Do you want coffee?” the boy asked “We’ll put the gear in the boat and then get some.” They had coffee from condensed milk cans at an early morning place that served fishermen “How did you sleep old man?” the boy asked He [26] was waking up now although it was still hard for him to leave his sleep “Very well, Manolin,” the old man said “I feel confident today.” “So I,” the boy said “Now I must get your sardines and mine and your fresh baits He brings our gear himself He never wants anyone to carry anything.” “We’re different,” the old man said “I let you carry things when you were five years old.” Hình Mơ hình thương mại điện tử C2C có kiến trúc phân tán THIẾT KẾ ỨNG DỤNG BTS Phần trình bày thiết kế ứng dụng P2P hỗ trợ thiết bị di động áp dụng cho dịch vụ mua bán giáo trình trường đại học dạng thử nghiệm Ứng dụng cho phép sinh viên trao đổi mua bán giáo trình qua sử dụng cách dễ dàng thuận ện thông qua máy nh thiết bị di động Ứng dụng sử dụng giao thức Gnutella để kết nối mạng P2P khơng có cấu trúc hỗ trợ thiết bị di động Android 4.1 Giao thức Gnutella Giao thức Gnutella sử dụng để xây dựng mạng P2P hồn tồn phân tán Mạng khơng có điều phối trung tâm hoạt động người dùng kết nối trực ếp với peer thông qua ứng dụng hoạt động với hai vai Journal of Science - Hong Bang Interna onal University trò máy trạm máy chủ Để định vị tài nguyên mạng vậy, peer sử dụng thuật toán Flooding để gửi yêu cầu đến peer lân cận peer ếp tục chuyển ếp yêu cầu cho peer lân cận họ Thuật tốn phát tán u cầu đến tồn mạng nên gọi Flooding Bất kỳ peer giữ tài nguyên m kiếm gửi trả lời peer gửi theo lộ trình yêu cầu gửi tới Có năm loại thơng báo sử dụng giao thức (Androutsellis cộng sự, 2004): Ping - Thông báo tự giới thiệu đến peer lân cận đồng thời kiểm tra tồn peer Pong - Thông báo phản hồi cho thông báo Ping chứa địa IP cổng peer phản hồi, số lượng kích thước tài nguyên chia sẻ ISSN: 2615 - 9686 He was an old man who fished alone in a skiff in the Gulf Stream and he had gone eighty-four days now without taking a fish In the first forty days a boy had been with him But after forty days without a fish the boy’s parents had told him that the old man was now definitely and finally salao, which is the worst form of unlucky, and the boy had gone at their orders in another boat which caught three good fish the first week It made the boy sad to see the old man come in each day with his skiff empty and he always went down to help him carry either the coiled lines or the gaff and harpoon and the sail that was furled around the mast The sail was patched with flour sacks and, furled, it looked like the flag of permanent defeat The old man was thin and gaunt with deep wrinkles in the back of his neck The brown blotches of the benevolent skin cancer the sun brings from its [9] reflection on the tropic sea were on his cheeks The blotches ran well down the sides of his face and his hands had the deep-creased scars from handling heavy fish on the cords But none of these scars were fresh They were as old as erosions in a fishless desert Everything about him was old except his eyes and they were the same color as the sea and were cheerful and undefeated “Santiago,” the boy said to him as they climbed the bank from where the skiff w Tạp chí KHOA HỌC - Trường Đại học Quốc tế Hồng Bàng Số 14 - 01/2021: 1-12 We’ve made some money.” The old man had taught the boy to fish and the boy loved him “No,” the old man said “You’re with a lucky boat Stay with them.” “But remember how you went eighty-seven days without fish and then we caught big ones every day for three weeks.” “I remember,” the old man said “I know you did not leave me because you doubted.” “It was papa made me leave I am a boy and I must obey him.” “I know,” the old man said “It is quite normal.” “He hasn’t much faith.” [10] “No,” the old man said “But we have Haven’t we?” ‘Yes,” the boy said “Can I offer you a beer on the Terrace and then we’ll take the stuff home.” “Why not?” the old man said “Between fishermen.” They sat on the Terrace and many of the fishermen made fun of the old man and he was not angry Others, of the older fishermen, looked at him and were sad But they did not show it and they spoke politely about the current and the depths they had drifted their lines at and the steady good weather and of what they had seen The successful fishermen of that day were already in and had butchered their marlin out and carried them laid full length across two planks, with two men Ernest Hemingway The Old Man and the Sea staggering at the end of each plank, to the fish house where they waited for the ice truck to carry them to the market in Ha taken them to the shark factory on the other side of the cove where they were hoisted on a block and tackle, their livers removed, their fins cut off and their hides skinned out and their flesh cut into strips for salting When the wind was in the east a smell came across the harbour from the shark factory; but today there [11] was only the faint edge of the odour because the wind had backed into the north and then dropped off and it was pleasant and sunny on the Terrace “Santiago,” the boy said “Yes,” the old man said He was holding his glass and thinking of many years ago “Can I go out to get sardines for you for tomorrow?” “No Go and play baseball I can still row and Rogelio will throw the net.” “I would like to go If I cannot fish with you I would like to serve in some way.” “You bought me a beer,” the old man said “You are already a man.” “How old was I when you first took me in a boat?” “Five and you nearly were killed when I brought the fish in too green and he nearly tore the boat to pieces Can you remember?” “I can remember the tail slapping and banging and the thwart breaking and the noise of the clubbing I can remember you throwing me into the bow where the wet coiled lines were and feeling the whole boat shiver and the noise of you clubbing him like chopping a tree down and the sweet blood smell all over me.” [12] “Can it to you?” “I remember everything from when we first went together.” The old man looked at him with his sun-burned, confident loving eyes “If you were my boy I’d take you out and gamble,” he said “But you are your father’s and your mother’s and you are in a lucky boat.” “May I get the sardines? I know where I can get four baits too.” “I have mine left from today I put them in salt in the box.” “Let me get four fresh ones.” “One,” the old man said His hope and his confidence had never gone But now they were freshening as when the breeze rises “Two,” the boy said “Two,” the old man agreed “You didn’t steal them?” “I would,” the boy said “But I bought these.” “Thank you,” the old man said He was too simple to wonder when he had attained humility But he [13] knew he had attained it and he knew it was not disgraceful and it carried no loss of true pride “Tomorrow is going to be a good day with this current,” he said “Where are you going?” the boy asked “Far out to come in when the wind shifts I want to be out before it is light.” “I’ll try to get him to work far out,” the boy said “Then if you hook something truly big we can come to your aid.” “He does not like to work too far out.” “No,” the boy said “But I will see something that he cannot see such as a bird working and get him to come out after dolphin.” “Are his eyes that bad?” “He is Query - Thông báo yêu cầu m kiếm chứa chuỗi m kiếm yêu cầu tốc độ tối thiểu peer phản hồi mạng P2P Kiến trúc mạng P2P khơng có cấu trúc hạn chế tối đa việc sử dụng máy chủ tập trung Ứng dụng di động BTS có số thành phần Hình 6: said “He never went turtle-ing That is what kills the eyes.” “But you went turtle-ing for years off the Mosquito Coast and your eyes are good.” Ernest Hemingway The Old Man and the Sea “I am a strange old man” “But are you strong enough now for a truly big fish?” “I think so And there are many tricks.” [14] “Let us take the stuff home,” the boy said “So I can get the cast net and go after the sardines.” They picked up the gear from the boat The old man carried the mast on his shoulder and the boy carried the wooden boat with the coiled, hard-braided brown lines, the gaff and the harpoon with its shaft The box with the baits was under the stern of the skiff along with the club that was used to subdue the big fish when they were brought alongside No one would steal from the old man but it was better to take the sail and the heavy lines home as the dew was bad for them and, though he was quite sure no local people would steal from him, the old man thought that a gaff and a harpoon were needless temptations to leave in a boat They walked up the road together to the old man’s shack and went in through its open door The old man leaned the mast with its wrapped sail against the wall and the boy put the box and the other gear beside it The mast was nearly as long as the one room of the shack The shack was made of the toug called guano and in it there was a bed, a table, one chair, and a place on the dirt floor to cook with charcoal On the brown walls of the flattened, overlapping leaves of the sturdy fibered [15] guano there was a picture in color of the Sacred Heart of Jesus and another of the Virgin of Cobre These were relics of his wife Once there had been a tinted photograph of his wife on the wall but he had taken it down because it made him too lonely to see it and it was on the shelf in the corner under his clean shirt “What you have to eat?” the boy asked “A pot of yellow rice with fish Do you want some?” “No I will eat at home Do you want me to make the fire?” “No I will make it later on Or I may eat the rice cold.” “May I take the cast net?” “Of course.” There was no cast net and the boy remembered when they had sold it But they went through this fiction every day There was no pot of yellow rice and fish and the boy knew this too “Eighty-five is a lucky number,” the old man said “How would you like to see me bring one in that dressed out over a thousand pounds?” “I’ll get the cast net and go for sardines Will you sit in the sun in the doorway?” [16] “Yes I have yesterday’s paper and I will read the baseball.” The boy did not know whether yesterday’s paper was a fiction too But the old man brought it out from under the bed “Perico gave it t back when I have the sardines I’ll keep yours and mine together on ice and we can share them in the morning When I come back you can tell me about the baseball.” “The Yankees cannot lose.” “But I fear the Indians of Cleveland.” “Have faith in the Yankees my son Think of the great DiMaggio.” “I fear both the Tigers of Detroit and the Indians of Cleveland.” “Be careful or you will fear even the Reds of Cincinnati and the White Sax of Chicago.” “You study it and tell me when I come back.” “Do you think we should buy a terminal of the lottery with an eighty-five? Tomorrow is the eighty-fifth day.” “We can that,” the boy said “But what about the eighty-seven of your great record?” [17] “It could not happen twice Do you think you can find an eighty-five?” Ernest Hemingway The Old Man and the Sea “I can order one “One sheet That’s two dollars and a half Who can we borrow that from?” “That’s easy I can always borrow two dollars and a half.” “I think perhaps I can too But I try not to borrow First you borrow Then you beg.” “Keep warm old man,” the boy said “Remember we are in September.” “The month when the great fish come,” the old man said “Anyone can be a fisherman in May.” “I go now for the sardines,” the boy said When the boy came back the old man was asleep in the chair and the sun was down The boy took the over the back of the chair and over the old man’s shoulders They were strange shoulders, still powerful although very old, and the neck was still strong too and the creases did not show so much when the old man was asleep and his head fallen forward His shirt had been patched so many times that it was like the sail and the patches were faded to many different shades by the sun The [18] old man’s head was very old though and with his eyes closed there was no life in his face The newspaper lay across his knees and the weight of his arm held it there in the evening breeze He was barefooted The boy left him there and when he came back the old man was still asleep “Wake up old man,” the boy said and put his hand on one of the old man’s knees The old man opened his eyes and for a moment he was coming back from a long way away Then he smiled “What have you got?” he asked “Supper,” said the boy “We’re going to have supper.” “I’m not very hungry.” “Come on and eat You can’t fish and not eat.” “I have,” the old man said getting up and taking the newspaper and folding it Then he started to fold the blanket “Keep the blanket around you,” the boy said “You’ll not fish without eating while I’m alive.” “Then live a long time and take care of yourself,” the old man said “What are we eating?” “Black beans and rice, fried ba QueryHit - Thông báo phản hồi cho thông báo Query chứa địa IP, cổng tốc độ peer phản hồi, số lượng tài nguyên phù hợp m thấy tập hợp kết lập mục tài nguyên brought them in a two-decker metal container from the Terrace The two sets of knives and forks and spoons were in his pocket with a paper napkin wrapped around each set “Who gave this to you?” “Martin The owner.” “I must thank him.” “I thanked him already,” the boy said “You don’t need to thank him.” “I’ll give him the belly meat of a big fish,” the old man said “Has he done this for us more than once?” “I think so.” “I must give him something more than the belly meat then He is very thoughtful for us.” “He sent two beers.” “I like the beer in cans best.” “I know But this is in bottles, Hatuey beer, and I take back the bottles.” “That’s very kind of you,” the old man said “Should we eat?” “I’ve been asking you to,” the boy told him gently “I have not wished to open the container until you were ready.” [20] “I’m ready now,” the old man said “I only needed time to wash.” Where did you wash? the boy thought The village water supply was two streets down the road I must have water here for him, the boy thought, and soap and a good towel Why am I so Ernest Hemingway The Old Man and the Sea thoughtless? I must get him another shirt and a jacket for the winter and some sort of shoes and another blanket “Your stew is excellent,” the old man said “Tell me about the baseball,” the boy asked him “In the American League it is the Yan Quản lý người dùng lưu trữ thông n người dùng bao gồm thông n liên lạc, địa IP chia sẻ công khai “They lost today,” the boy told him “That means nothing The great DiMaggio is himself again.” “They have other men on the team.” “Naturally But he makes the difference In the other league, between Brooklyn and Philadelphia I must take Brooklyn But then I think of Dick Sisler and those great drives In the old park.” “There was nothing ever like them He hits the longest ball I have ever seen.” “Do you remember when he used to come to the Terrace?” [21] “I wanted to take him fishing but I was too timid to ask him Then I asked you to ask him and you were too timid.” “I know It was a great mistake He might have gone with us Then we would have that for all of our lives.” “I would like to take the great DiMaggio fishing,” the old man said “They say his father was a fisherman Maybe he was as poor as we are and would understand.” “The great Sisler’s father was never poor and he, the father, was playing in the Big Leagues when he was my age.” “When I was your age I was before the mast on a square rigged ship that ran to Africa and I have seen lions on the beaches in the evening.” “I know You told me.” “Should we talk about Africa or about baseball?” “Baseball I think,” the boy said “Tell me about the great John J McGraw.” He said Jota for J “He used to come to the Terrace sometimes too in the older days But he was rough and drinking His mind was on horses as well as baseball At least he carried lists of [22] horses at all times in his pocket and frequently spoke the names of horses on the telephone.” “He was a great manager,” the boy said “My father thinks he was the greatest.” “Because he came here the most times,” the old man said “If Durocher had continued to come here each year your father would think him the greatest manager.” “Who is the greatest manager, really, Luque or Mike Gonzalez?” “I think they are equal.” “And the best fisherman is you.” “No I know others better.” “Que Va,” the boy said “There are many good fishermen and some great ones But there is only you.” “Thank you You make me happy I hope no fish will come along so great that he will prove us wrong.” “There is no such fish if you are still strong as you say.” “I may not be as strong as I think,” the old man said “But I know many tricks and I have resolution.” “You ought to go to bed now so that you will be fresh in the morning I will take the things back to the Terrace.” [23] “Good night then I will wake you in the morning.” “You’re my alarm clock,” the boy said Ernest Hemingway The Old Man and the Sea “Age is my alarm clock,” the old man said “Why old men wake so early? Is it to have one longer day?” “I don’t know,” the boy said “All I know is that young boys sleep la man said “I’ll waken you in time.” “I not like for him to waken me It is as though I were inferior.” “I know.” “Sleep well old man.” The boy went out They had eaten with no light on the table and the old man took off his trousers and went to bed in the dark He rolled his trousers up to make a pillow, putting the newspaper inside them He rolled himself in the blanket and slept on the other old newspapers that covered the springs of the bed He was asleep in a short time and he dreamed of Africa when he was a boy and the long golden beaches and the white beaches, so white they hurt your eyes, and the high capes and the great brown mountains He lived along that coast now every night and in his dreams he heard the surf roar and saw the native boats [24] come riding through it He smelled the tar and oakum of the deck as he slept and he smelled the smell of Africa that the land breeze brought at morning Usually when he smelled the land breeze he woke up and dressed to go and wake the boy But tonight the smell of the land breeze came very early and he knew it was too early in his dream and went on dreaming to see the white peaks of the Islands rising from the sea and then he dreamed of the different harbours and roadsteads of the Canary Islands He no longer dreamed of storms, nor of women, nor of great occurrences, n strength, nor of his wife He only dreamed of places now and of the lions on the beach They played like young cats in the dusk and he loved them as he loved the boy He never dreamed about the boy He simply woke, looked out the open door at the moon and unrolled his trousers and put them on He urinated outside the shack and then went up the road to wake the boy He was shivering with the morning cold But he knew he would shiver himself warm and that soon he would be rowing The door of the house where the boy lived was unlocked and he opened it and walked in quietly with his [25] bare feet The boy was asleep on a cot in the first room and the old man could see him clearly with the light that came in from the dying moon He took hold of one foot gently and held it until the boy woke and turned and looked at him The old man nodded and the boy took his trousers from the chair by the bed and, sitting on the bed, pulled them on The old man went out the door and the boy came after him He was sleepy and the old man put his arm across his shoulders and said, “I am sorry.” “Qua Va,” the boy said “It is what a man must do.” They walked down the road to the old man’s shack and all along the road, in the dark, barefoot men were moving, carrying the masts of their boats When they reached the old man’s shack the boy Quản lý tài nguyên quảng cáo tài nguyên người dùng bao gồm sách bán sách mua danh sách yêu thích harpoon and gaff and the old man carried the mast with the furled sail on his shoulder “Do you want coffee?” the boy asked “We’ll put the gear in the boat and then get some.” They had coffee from condensed milk cans at an early morning place that served fishermen “How did you sleep old man?” the boy asked He [26] was waking up now although it was still hard for him to leave his sleep “Very well, Manolin,” the old man said “I feel confident today.” “So I,” the boy said “Now I must get your sardines and mine and your fresh baits He brings our gear himself He never wants anyone to carry anything.” “We’re different,” the old man said “I let you carry things when you were five years old.” Push - Thơng báo u cầu tải xuống cho peer phía sau tường lửa Hình giải thích cách hoạt động thuật toán Flooding mạng Gnutella Mỗi yêu cầu từ peer chuyển trực ếp đến peer lân cận kết nối, ếp tục chuyển đến peer lân cận chúng, yêu cầu trả lời số lượng tối đa lần chuyển ếp xảy cách áp dụng giá trị thời gian tồn (TTL) yêu cầu lưu trữ phần đầu thông báo (Milojicic cộng sự, 2002) Theo hình, peer (2) muốn m kiếm tài nguyên để tải Đầu ên, peer (2) gửi yêu cầu đến peer (1), (5) (3) Thông báo chuyển ếp đến peer (4) giữ tài nguyên cần m Sau peer (4) phản hồi kết quả, peer (2) liên hệ với peer (4) trực ếp để tải tài nguyên Hình Thuật tốn Flooding mạng Gnutella P2P Quản lý giao dịch theo dõi lịch sử giao dịch bao gồm danh sách peer sách giao dịch Quản lý đánh giá gửi đánh giá chất lượng peer đến, nhận cập nhật đánh giá chất lượng peer, từ máy chủ tập trung Quản lý m kiếm cung cấp chức m kiếm từ khóa để peer m kiếm tên sách Quản lý thông báo bao gồm chức thông báo để peer liên hệ trực ếp với sau m kiếm sách thành cơng Hình Các thành phần ứng dụng BTS 4.2 Kiến trúc BTS Kiến trúc BTS đề xuất bao gồm hai phần chính: (i) máy chủ khởi động lưu trữ danh sách peer hoạt động thường trực mạng P2P đánh giá xếp hạng chất lượng dịch vụ peer cung cấp từ giao dịch trước; (ii) chức ứng dụng di động BTS cho phép peer kết nối thực hoạt động 4.3 Bộ điều phối Gnutella Ứng dụng BTS hay ứng dụng ngang hàng peer sử dụng danh sách peer kết nối gần để tham gia mạng P2P Một peer khơng có danh sách trước ên cần kết nối với máy chủ khởi động (được công bố công khai) để nhận danh sách peer lân cận, sau kết nối peer lân cận để tham gia mạng ISSN: 2615 - 9686 Journal of Science - Hong Bang Interna onal University He was an old man who fished alone in a skiff in the Gulf Stream and he had gone eighty-four days now without taking a fish In the first forty days a boy had been with him But after forty days without a fish the boy’s parents had told him that the old man was now definitely and finally salao, which is the worst form of unlucky, and the boy had gone at their orders in another boat which caught three good fish the first week It made the boy sad to see the old man come in each day with his skiff empty and he always went down to help him carry either the coiled lines or the gaff and harpoon and the sail that was furled around the mast The sail was patched with flour sacks and, furled, it looked like the flag of permanent defeat The old man was thin and gaunt with deep wrinkles in the back of his neck The brown blotches of the benevolent skin cancer the sun brings from its [9] reflection on the tropic sea were on his cheeks The blotches ran well down the sides of his face and his hands had the deep-creased scars from handling heavy fish on the cords But none of these scars were fresh They were as old as erosions in a fishless desert Everything about him was old except his eyes and they were the same color as the sea and were cheerful and undefeated “Santiago,” the boy said to him as they climbed the bank from where the skiff w Tạp chí KHOA HỌC - Trường Đại học Quốc tế Hồng Bàng Số 14 - 01/2021: 1-12 We’ve made some money.” The old man had taught the boy to fish and the boy loved him “No,” the old man said “You’re with a lucky boat Stay with them.” “But remember how you went eighty-seven days without fish and then we caught big ones every day for three weeks.” “I remember,” the old man said “I know you did not leave me because you doubted.” “It was papa made me leave I am a boy and I must obey him.” “I know,” the old man said “It is quite normal.” “He hasn’t much faith.” [10] “No,” the old man said “But we have Haven’t we?” ‘Yes,” the boy said “Can I offer you a beer on the Terrace and then we’ll take the stuff home.” “Why not?” the old man said “Between fishermen.” They sat on the Terrace and many of the fishermen made fun of the old man and he was not angry Others, of the older fishermen, looked at him and were sad But they did not show it and they spoke politely about the current and the depths they had drifted their lines at and the steady good weather and of what they had seen The successful fishermen of that day were already in and had butchered their marlin out and carried them laid full length across two planks, with two men Ernest Hemingway The Old Man and the Sea staggering at the end of each plank, to the fish house where they waited for the ice truck to carry them to the market in Ha taken them to the shark factory on the other side of the cove where they were hoisted on a block and tackle, their livers removed, their fins cut off and their hides skinned out and their flesh cut into strips for salting When the wind was in the east a smell came across the harbour from the shark factory; but today there [11] was only the faint edge of the odour because the wind had backed into the north and then dropped off and it was pleasant and sunny on the Terrace “Santiago,” the boy said “Yes,” the old man said He was holding his glass and thinking of many years ago “Can I go out to get sardines for you for tomorrow?” “No Go and play baseball I can still row and Rogelio will throw the net.” “I would like to go If I cannot fish with you I would like to serve in some way.” “You bought me a beer,” the old man said “You are already a man.” “How old was I when you first took me in a boat?” “Five and you nearly were killed when I brought the fish in too green and he nearly tore the boat to pieces Can you remember?” “I can remember the tail slapping and banging and the thwart breaking and the noise of the clubbing I can remember you throwing me into the bow where the wet coiled lines were and feeling the whole boat shiver and the noise of you clubbing him like chopping a tree down and the sweet blood smell all over me.” [12] “Can it to you?” “I remember everything from when we first went together.” The old man looked at him with his sun-burned, confident loving eyes “If you were my boy I’d take you out and gamble,” he said “But you are your father’s and your mother’s and you are in a lucky boat.” “May I get the sardines? I know where I can get four baits too.” “I have mine left from today I put them in salt in the box.” “Let me get four fresh ones.” “One,” the old man said His hope and his confidence had never gone But now they were freshening as when the breeze rises “Two,” the boy said “Two,” the old man agreed “You didn’t steal them?” “I would,” the boy said “But I bought these.” “Thank you,” the old man said He was too simple to wonder when he had attained humility But he [13] knew he had attained it and he knew it was not disgraceful and it carried no loss of true pride “Tomorrow is going to be a good day with this current,” he said “Where are you going?” the boy asked “Far out to come in when the wind shifts I want to be out before it is light.” “I’ll try to get him to work far out,” the boy said “Then if you hook something truly big we can come to your aid.” “He does not like to work too far out.” “No,” the boy said “But I will see something that he cannot see such as a bird working and get him to come out after dolphin.” “Are his eyes that bad?” “He is P2P Khi peer kết nối trực tuyến, tài nguyên sách peer lưu trữ thư mục chia sẻ quảng cáo công khai mạng P2P Mỗi sách tập n XML lưu trữ thông n sách, giá cả, thông n liên hệ, địa IP, v.v trực ếp tập n XML từ peer phản hồi, sau hai peer có đầy đủ thông n để thực giao dịch trực ếp Hình trình bày cách tài nguyên sách quảng cáo, cách peer gửi thông báo m kiếm sách, nhận thông báo phản hồi từ số peer sau tải tập n XML từ peer chọn said “He never went turtle-ing That is what kills the eyes.” “But you went turtle-ing for years off the Mosquito Coast and your eyes are good.” Ernest Hemingway The Old Man and the Sea “I am a strange old man” “But are you strong enough now for a truly big fish?” “I think so And there are many tricks.” [14] “Let us take the stuff home,” the boy said “So I can get the cast net and go after the sardines.” They picked up the gear from the boat The old man carried the mast on his shoulder and the boy carried the wooden boat with the coiled, hard-braided brown lines, the gaff and the harpoon with its shaft The box with the baits was under the stern of the skiff along with the club that was used to subdue the big fish when they were brought alongside No one would steal from the old man but it was better to take the sail and the heavy lines home as the dew was bad for them and, though he was quite sure no local people would steal from him, the old man thought that a gaff and a harpoon were needless temptations to leave in a boat They walked up the road together to the old man’s shack and went in through its open door The old man leaned the mast with its wrapped sail against the wall and the boy put the box and the other gear beside it The mast was nearly as long as the one room of the shack The shack was made of the toug called guano and in it there was a bed, a table, one chair, and a place on the dirt floor to cook with charcoal On the brown walls of the flattened, overlapping leaves of the sturdy fibered [15] guano there was a picture in color of the Sacred Heart of Jesus and another of the Virgin of Cobre These were relics of his wife Once there had been a tinted photograph of his wife on the wall but he had taken it down because it made him too lonely to see it and it was on the shelf in the corner under his clean shirt “What you have to eat?” the boy asked “A pot of yellow rice with fish Do you want some?” “No I will eat at home Do you want me to make the fire?” “No I will make it later on Or I may eat the rice cold.” “May I take the cast net?” “Of course.” There was no cast net and the boy remembered when they had sold it But they went through this fiction every day There was no pot of yellow rice and fish and the boy knew this too “Eighty-five is a lucky number,” the old man said “How would you like to see me bring one in that dressed out over a thousand pounds?” “I’ll get the cast net and go for sardines Will you sit in the sun in the doorway?” [16] “Yes I have yesterday’s paper and I will read the baseball.” The boy did not know whether yesterday’s paper was a fiction too But the old man brought it out from under the bed “Perico gave it t back when I have the sardines I’ll keep yours and mine together on ice and we can share them in the morning When I come back you can tell me about the baseball.” “The Yankees cannot lose.” “But I fear the Indians of Cleveland.” “Have faith in the Yankees my son Think of the great DiMaggio.” “I fear both the Tigers of Detroit and the Indians of Cleveland.” “Be careful or you will fear even the Reds of Cincinnati and the White Sax of Chicago.” “You study it and tell me when I come back.” “Do you think we should buy a terminal of the lottery with an eighty-five? Tomorrow is the eighty-fifth day.” “We can that,” the boy said “But what about the eighty-seven of your great record?” [17] “It could not happen twice Do you think you can find an eighty-five?” Ernest Hemingway The Old Man and the Sea “I can order one “One sheet That’s two dollars and a half Who can we borrow that from?” “That’s easy I can always borrow two dollars and a half.” “I think perhaps I can too But I try not to borrow First you borrow Then you beg.” “Keep warm old man,” the boy said “Remember we are in September.” “The month when the great fish come,” the old man said “Anyone can be a fisherman in May.” “I go now for the sardines,” the boy said When the boy came back the old man was asleep in the chair and the sun was down The boy took the over the back of the chair and over the old man’s shoulders They were strange shoulders, still powerful although very old, and the neck was still strong too and the creases did not show so much when the old man was asleep and his head fallen forward His shirt had been patched so many times that it was like the sail and the patches were faded to many different shades by the sun The [18] old man’s head was very old though and with his eyes closed there was no life in his face The newspaper lay across his knees and the weight of his arm held it there in the evening breeze He was barefooted The boy left him there and when he came back the old man was still asleep “Wake up old man,” the boy said and put his hand on one of the old man’s knees The old man opened his eyes and for a moment he was coming back from a long way away Then he smiled “What have you got?” he asked “Supper,” said the boy “We’re going to have supper.” “I’m not very hungry.” “Come on and eat You can’t fish and not eat.” “I have,” the old man said getting up and taking the newspaper and folding it Then he started to fold the blanket “Keep the blanket around you,” the boy said “You’ll not fish without eating while I’m alive.” “Then live a long time and take care of yourself,” the old man said “What are we eating?” “Black beans and rice, fried ba brought them in a two-decker metal container from the Terrace The two sets of knives and forks and spoons were in his pocket with a paper napkin wrapped around each set “Who gave this to you?” “Martin The owner.” “I must thank him.” “I thanked him already,” the boy said “You don’t need to thank him.” “I’ll give him the belly meat of a big fish,” the old man said “Has he done this for us more than once?” “I think so.” “I must give him something more than the belly meat then He is very thoughtful for us.” “He sent two beers.” “I like the beer in cans best.” “I know But this is in bottles, Hatuey beer, and I take back the bottles.” “That’s very kind of you,” the old man said “Should we eat?” “I’ve been asking you to,” the boy told him gently “I have not wished to open the container until you were ready.” [20] “I’m ready now,” the old man said “I only needed time to wash.” Where did you wash? the boy thought The village water supply was two streets down the road I must have water here for him, the boy thought, and soap and a good towel Why am I so Ernest Hemingway The Old Man and the Sea thoughtless? I must get him another shirt and a jacket for the winter and some sort of shoes and another blanket “Your stew is excellent,” the old man said “Tell me about the baseball,” the boy asked him “In the American League it is the Yan “They lost today,” the boy told him “That means nothing The great DiMaggio is himself again.” “They have other men on the team.” “Naturally But he makes the difference In the other league, between Brooklyn and Philadelphia I must take Brooklyn But then I think of Dick Sisler and those great drives In the old park.” “There was nothing ever like them He hits the longest ball I have ever seen.” “Do you remember when he used to come to the Terrace?” [21] “I wanted to take him fishing but I was too timid to ask him Then I asked you to ask him and you were too timid.” “I know It was a great mistake He might have gone with us Then we would have that for all of our lives.” “I would like to take the great DiMaggio fishing,” the old man said “They say his father was a fisherman Maybe he was as poor as we are and would understand.” “The great Sisler’s father was never poor and he, the father, was playing in the Big Leagues when he was my age.” “When I was your age I was before the mast on a square rigged ship that ran to Africa and I have seen lions on the beaches in the evening.” “I know You told me.” “Should we talk about Africa or about baseball?” “Baseball I think,” the boy said “Tell me about the great John J McGraw.” He said Jota for J “He used to come to the Terrace sometimes too in the older days But he was rough and drinking His mind was on horses as well as baseball At least he carried lists of [22] horses at all times in his pocket and frequently spoke the names of horses on the telephone.” “He was a great manager,” the boy said “My father thinks he was the greatest.” “Because he came here the most times,” the old man said “If Durocher had continued to come here each year your father would think him the greatest manager.” “Who is the greatest manager, really, Luque or Mike Gonzalez?” “I think they are equal.” “And the best fisherman is you.” “No I know others better.” “Que Va,” the boy said “There are many good fishermen and some great ones But there is only you.” “Thank you You make me happy I hope no fish will come along so great that he will prove us wrong.” “There is no such fish if you are still strong as you say.” “I may not be as strong as I think,” the old man said “But I know many tricks and I have resolution.” “You ought to go to bed now so that you will be fresh in the morning I will take the things back to the Terrace.” [23] “Good night then I will wake you in the morning.” “You’re my alarm clock,” the boy said Ernest Hemingway The Old Man and the Sea “Age is my alarm clock,” the old man said “Why old men wake so early? Is it to have one longer day?” “I don’t know,” the boy said “All I know is that young boys sleep la Khi nhận thơng báo m kiếm, peer dùng từ khóa tên sách để phù hợp danh sách tài nguyên sách thư mục chia sẻ Nếu m thấy sách vậy, peer phản hồi thông báo cho peer m kiếm theo lộ trình ngược lại qua peer lân cận Peer m kiếm nhận thông báo phản hồi, sử dụng thông n phản hồi để tải man said “I’ll waken you in time.” “I not like for him to waken me It is as though I were inferior.” “I know.” “Sleep well old man.” The boy went out They had eaten with no light on the table and the old man took off his trousers and went to bed in the dark He rolled his trousers up to make a pillow, putting the newspaper inside them He rolled himself in the blanket and slept on the other old newspapers that covered the springs of the bed He was asleep in a short time and he dreamed of Africa when he was a boy and the long golden beaches and the white beaches, so white they hurt your eyes, and the high capes and the great brown mountains He lived along that coast now every night and in his dreams he heard the surf roar and saw the native boats [24] come riding through it He smelled the tar and oakum of the deck as he slept and he smelled the smell of Africa that the land breeze brought at morning Usually when he smelled the land breeze he woke up and dressed to go and wake the boy But tonight the smell of the land breeze came very early and he knew it was too early in his dream and went on dreaming to see the white peaks of the Islands rising from the sea and then he dreamed of the different harbours and roadsteads of the Canary Islands He no longer dreamed of storms, nor of women, nor of great occurrences, n strength, nor of his wife He only dreamed of places now and of the lions on the beach They played like young cats in the dusk and he loved them as he loved the boy He never dreamed about the boy He simply woke, looked out the open door at the moon and unrolled his trousers and put them on He urinated outside the shack and then went up the road to wake the boy He was shivering with the morning cold But he knew he would shiver himself warm and that soon he would be rowing The door of the house where the boy lived was unlocked and he opened it and walked in quietly with his [25] bare feet The boy was asleep on a cot in the first room and the old man could see him clearly with the light that came in from the dying moon He took hold of one foot gently and held it until the boy woke and turned and looked at him The old man nodded and the boy took his trousers from the chair by the bed and, sitting on the bed, pulled them on The old man went out the door and the boy came after him He was sleepy and the old man put his arm across his shoulders and said, “I am sorry.” “Qua Va,” the boy said “It is what a man must do.” They walked down the road to the old man’s shack and all along the road, in the dark, barefoot men were moving, carrying the masts of their boats When they reached the old man’s shack the boy harpoon and gaff and the old man carried the mast with the furled sail on his shoulder “Do you want coffee?” the boy asked “We’ll put the gear in the boat and then get some.” They had coffee from condensed milk cans at an early morning place that served fishermen “How did you sleep old man?” the boy asked He [26] was waking up now although it was still hard for him to leave his sleep “Very well, Manolin,” the old man said “I feel confident today.” “So I,” the boy said “Now I must get your sardines and mine and your fresh baits He brings our gear himself He never wants anyone to carry anything.” “We’re different,” the old man said “I let you carry things when you were five years old.” Ứng dụng BTS bao gồm thành phần cần thiết để peer hỗ trợ thiết bị di động tham gia m kiếm sách mạng Gnutella P2P Các thành phần tập trung ba loại chức cho máy trạm, máy chủ kết nối mạng Hình Qui trình m kiếm tài nguyên sách peer Máy trạm: - Nhận thơng n cấu hình từ người dùng thơng qua tập n văn preference.txt - Khởi động phận Pinger để thường xuyên kiểm tra tồn peer lân cận tự quảng bá peer - Khởi động phận Connector để kết nối với peer danh sách peer - Làm việc với tài nguyên sách hoạt động hiển thị thông báo m kiếm tải kết m kiếm thông qua điều phối Gnutella Coordinator - Xử lý loại thông báo khác Kết nối mạng: - Chứa phận NetworkManager để theo dõi peer lân cận cịn hoạt động trực tuyến - Mỗi thơng báo gửi peer chứa phần đầu với: mô tả nội dung (loại thông báo), độ dài nội dung, TTL (thời gian tồn tại), Hops (số bước chuyển thông báo), định danh thông báo (dùng để tạo thông báo phản hồi cho thông báo m kiếm) - Mỗi thông báo có phận Handler tương ứng để giữ thông n định tuyến, khả yêu cầu cho loại thông báo Máy chủ: - Khởi động phận Listener để kết nối peer - Khởi động dịch vụ tải để m kiếm thư mục chia sẻ nhận thông báo m kiếm tạo thông báo phản hồi cho peer m kiếm để tải tài nguyên Ứng dụng bao gồm ba chức mở rộng từ giao thức Gnutella: Journal of Science - Hong Bang Interna onal University ISSN: 2615 - 9686 He was an old man who fished alone in a skiff in the Gulf Stream and he had gone eighty-four days now without taking a fish In the first forty days a boy had been with him But after forty days without a fish the boy’s parents had told him that the old man was now definitely and finally salao, which is the worst form of unlucky, and the boy had gone at their orders in another boat which caught three good fish the first week It made the boy sad to see the old man come in each day with his skiff empty and he always went down to help him carry either the coiled lines or the gaff and harpoon and the sail that was furled around the mast The sail was patched with flour sacks and, furled, it looked like the flag of permanent defeat The old man was thin and gaunt with deep wrinkles in the back of his neck The brown blotches of the benevolent skin cancer the sun brings from its [9] reflection on the tropic sea were on his cheeks The blotches ran well down the sides of his face and his hands had the deep-creased scars from handling heavy fish on the cords But none of these scars were fresh They were as old as erosions in a fishless desert Everything about him was old except his eyes and they were the same color as the sea and were cheerful and undefeated “Santiago,” the boy said to him as they climbed the bank from where the skiff w Tạp chí KHOA HỌC - Trường Đại học Quốc tế Hồng Bàng Số 14 - 01/2021: 1-12 We’ve made some money.” The old man had taught the boy to fish and the boy loved him “No,” the old man said “You’re with a lucky boat Stay with them.” “But remember how you went eighty-seven days without fish and then we caught big ones every day for three weeks.” “I remember,” the old man said “I know you did not leave me because you doubted.” “It was papa made me leave I am a boy and I must obey him.” “I know,” the old man said “It is quite normal.” “He hasn’t much faith.” [10] “No,” the old man said “But we have Haven’t we?” ‘Yes,” the boy said “Can I offer you a beer on the Terrace and then we’ll take the stuff home.” “Why not?” the old man said “Between fishermen.” They sat on the Terrace and many of the fishermen made fun of the old man and he was not angry Others, of the older fishermen, looked at him and were sad But they did not show it and they spoke politely about the current and the depths they had drifted their lines at and the steady good weather and of what they had seen The successful fishermen of that day were already in and had butchered their marlin out and carried them laid full length across two planks, with two men Ernest Hemingway The Old Man and the Sea staggering at the end of each plank, to the fish house where they waited for the ice truck to carry them to the market in Ha taken them to the shark factory on the other side of the cove where they were hoisted on a block and tackle, their livers removed, their fins cut off and their hides skinned out and their flesh cut into strips for salting When the wind was in the east a smell came across the harbour from the shark factory; but today there [11] was only the faint edge of the odour because the wind had backed into the north and then dropped off and it was pleasant and sunny on the Terrace “Santiago,” the boy said “Yes,” the old man said He was holding his glass and thinking of many years ago “Can I go out to get sardines for you for tomorrow?” “No Go and play baseball I can still row and Rogelio will throw the net.” “I would like to go If I cannot fish with you I would like to serve in some way.” “You bought me a beer,” the old man said “You are already a man.” “How old was I when you first took me in a boat?” “Five and you nearly were killed when I brought the fish in too green and he nearly tore the boat to pieces Can you remember?” “I can remember the tail slapping and banging and the thwart breaking and the noise of the clubbing I can remember you throwing me into the bow where the wet coiled lines were and feeling the whole boat shiver and the noise of you clubbing him like chopping a tree down and the sweet blood smell all over me.” [12] “Can it to you?” “I remember everything from when we first went together.” The old man looked at him with his sun-burned, confident loving eyes “If you were my boy I’d take you out and gamble,” he said “But you are your father’s and your mother’s and you are in a lucky boat.” “May I get the sardines? I know where I can get four baits too.” “I have mine left from today I put them in salt in the box.” “Let me get four fresh ones.” “One,” the old man said His hope and his confidence had never gone But now they were freshening as when the breeze rises “Two,” the boy said “Two,” the old man agreed “You didn’t steal them?” “I would,” the boy said “But I bought these.” “Thank you,” the old man said He was too simple to wonder when he had attained humility But he [13] knew he had attained it and he knew it was not disgraceful and it carried no loss of true pride “Tomorrow is going to be a good day with this current,” he said “Where are you going?” the boy asked “Far out to come in when the wind shifts I want to be out before it is light.” “I’ll try to get him to work far out,” the boy said “Then if you hook something truly big we can come to your aid.” “He does not like to work too far out.” “No,” the boy said “But I will see something that he cannot see such as a bird working and get him to come out after dolphin.” “Are his eyes that bad?” “He is Quảng cáo sách: Tải tập n sách lên thư mục chia sẻ SharedDirectory từ sở liệu riêng peer; khởi động phận Listener cho máy chủ tải chức m kiếm thư mục chia sẻ cho thông báo m kiếm gửi đến trúc, nơi chức peer bao gồm ping, pong, query, queryhit, push xảy peer mà khơng có máy chủ trung tâm Các mũi tên peer mô tả trao đổi liệu mạng P2P said “He never went turtle-ing That is what kills the eyes.” “But you went turtle-ing for years off the Mosquito Coast and your eyes are good.” Ernest Hemingway The Old Man and the Sea “I am a strange old man” “But are you strong enough now for a truly big fish?” “I think so And there are many tricks.” [14] “Let us take the stuff home,” the boy said “So I can get the cast net and go after the sardines.” They picked up the gear from the boat The old man carried the mast on his shoulder and the boy carried the wooden boat with the coiled, hard-braided brown lines, the gaff and the harpoon with its shaft The box with the baits was under the stern of the skiff along with the club that was used to subdue the big fish when they were brought alongside No one would steal from the old man but it was better to take the sail and the heavy lines home as the dew was bad for them and, though he was quite sure no local people would steal from him, the old man thought that a gaff and a harpoon were needless temptations to leave in a boat They walked up the road together to the old man’s shack and went in through its open door The old man leaned the mast with its wrapped sail against the wall and the boy put the box and the other gear beside it The mast was nearly as long as the one room of the shack The shack was made of the toug called guano and in it there was a bed, a table, one chair, and a place on the dirt floor to cook with charcoal On the brown walls of the flattened, overlapping leaves of the sturdy fibered [15] guano there was a picture in color of the Sacred Heart of Jesus and another of the Virgin of Cobre These were relics of his wife Once there had been a tinted photograph of his wife on the wall but he had taken it down because it made him too lonely to see it and it was on the shelf in the corner under his clean shirt “What you have to eat?” the boy asked “A pot of yellow rice with fish Do you want some?” “No I will eat at home Do you want me to make the fire?” “No I will make it later on Or I may eat the rice cold.” “May I take the cast net?” “Of course.” There was no cast net and the boy remembered when they had sold it But they went through this fiction every day There was no pot of yellow rice and fish and the boy knew this too “Eighty-five is a lucky number,” the old man said “How would you like to see me bring one in that dressed out over a thousand pounds?” “I’ll get the cast net and go for sardines Will you sit in the sun in the doorway?” [16] “Yes I have yesterday’s paper and I will read the baseball.” The boy did not know whether yesterday’s paper was a fiction too But the old man brought it out from under the bed “Perico gave it t back when I have the sardines I’ll keep yours and mine together on ice and we can share them in the morning When I come back you can tell me about the baseball.” “The Yankees cannot lose.” “But I fear the Indians of Cleveland.” “Have faith in the Yankees my son Think of the great DiMaggio.” “I fear both the Tigers of Detroit and the Indians of Cleveland.” “Be careful or you will fear even the Reds of Cincinnati and the White Sax of Chicago.” “You study it and tell me when I come back.” “Do you think we should buy a terminal of the lottery with an eighty-five? Tomorrow is the eighty-fifth day.” “We can that,” the boy said “But what about the eighty-seven of your great record?” [17] “It could not happen twice Do you think you can find an eighty-five?” Ernest Hemingway The Old Man and the Sea “I can order one “One sheet That’s two dollars and a half Who can we borrow that from?” “That’s easy I can always borrow two dollars and a half.” “I think perhaps I can too But I try not to borrow First you borrow Then you beg.” “Keep warm old man,” the boy said “Remember we are in September.” “The month when the great fish come,” the old man said “Anyone can be a fisherman in May.” “I go now for the sardines,” the boy said When the boy came back the old man was asleep in the chair and the sun was down The boy took the over the back of the chair and over the old man’s shoulders They were strange shoulders, still powerful although very old, and the neck was still strong too and the creases did not show so much when the old man was asleep and his head fallen forward His shirt had been patched so many times that it was like the sail and the patches were faded to many different shades by the sun The [18] old man’s head was very old though and with his eyes closed there was no life in his face The newspaper lay across his knees and the weight of his arm held it there in the evening breeze He was barefooted The boy left him there and when he came back the old man was still asleep “Wake up old man,” the boy said and put his hand on one of the old man’s knees The old man opened his eyes and for a moment he was coming back from a long way away Then he smiled “What have you got?” he asked “Supper,” said the boy “We’re going to have supper.” “I’m not very hungry.” “Come on and eat You can’t fish and not eat.” “I have,” the old man said getting up and taking the newspaper and folding it Then he started to fold the blanket “Keep the blanket around you,” the boy said “You’ll not fish without eating while I’m alive.” “Then live a long time and take care of yourself,” the old man said “What are we eating?” “Black beans and rice, fried ba brought them in a two-decker metal container from the Terrace The two sets of knives and forks and spoons were in his pocket with a paper napkin wrapped around each set “Who gave this to you?” “Martin The owner.” “I must thank him.” “I thanked him already,” the boy said “You don’t need to thank him.” “I’ll give him the belly meat of a big fish,” the old man said “Has he done this for us more than once?” “I think so.” “I must give him something more than the belly meat then He is very thoughtful for us.” “He sent two beers.” “I like the beer in cans best.” “I know But this is in bottles, Hatuey beer, and I take back the bottles.” “That’s very kind of you,” the old man said “Should we eat?” “I’ve been asking you to,” the boy told him gently “I have not wished to open the container until you were ready.” [20] “I’m ready now,” the old man said “I only needed time to wash.” Where did you wash? the boy thought The village water supply was two streets down the road I must have water here for him, the boy thought, and soap and a good towel Why am I so Ernest Hemingway The Old Man and the Sea thoughtless? I must get him another shirt and a jacket for the winter and some sort of shoes and another blanket “Your stew is excellent,” the old man said “Tell me about the baseball,” the boy asked him “In the American League it is the Yan “They lost today,” the boy told him “That means nothing The great DiMaggio is himself again.” “They have other men on the team.” “Naturally But he makes the difference In the other league, between Brooklyn and Philadelphia I must take Brooklyn But then I think of Dick Sisler and those great drives In the old park.” “There was nothing ever like them He hits the longest ball I have ever seen.” “Do you remember when he used to come to the Terrace?” [21] “I wanted to take him fishing but I was too timid to ask him Then I asked you to ask him and you were too timid.” “I know It was a great mistake He might have gone with us Then we would have that for all of our lives.” “I would like to take the great DiMaggio fishing,” the old man said “They say his father was a fisherman Maybe he was as poor as we are and would understand.” “The great Sisler’s father was never poor and he, the father, was playing in the Big Leagues when he was my age.” “When I was your age I was before the mast on a square rigged ship that ran to Africa and I have seen lions on the beaches in the evening.” “I know You told me.” “Should we talk about Africa or about baseball?” “Baseball I think,” the boy said “Tell me about the great John J McGraw.” He said Jota for J “He used to come to the Terrace sometimes too in the older days But he was rough and Tìm kiếm mục êu: Tạo thơng báo m kiếm từ từ khóa người dùng gửi thông báo đến peer lân cận; peer lân cận, sau nhận thông báo, m kiếm từ khóa tên sách thư mục chia sẻ chúng; peer gửi thông báo phản hồi m sách, sau peer chuyển ếp thơng báo phản hồi peer m kiếm Máy chủ trung tâm cung cấp dịch vụ khởi động đánh giá chất lượng Các đánh giá chất lượng peer lưu trữ sở liệu trung tâm tất peer thực đánh giá chất lượng cập nhật liệu đánh giá Khi peer X muốn biết chất lượng cung cấp dịch vụ peer Y, peer X gửi yêu cầu HTTP GET đến máy chủ với số điện thoại định danh peer Y; máy chủ gửi thông báo phản hồi có đánh giá chất lượng giao dịch trước peer Y Khi giao dịch hoàn tất, peer X gửi đánh giá chất lượng peer Y đến máy chủ, n peer X gửi yêu cầu HTTP POST bao gồm số điện thoại định danh peer Y đánh giá chất lượng hình thức điểm đánh giá Khi nhận yêu cầu HTTP POST, máy chủ sử dụng thuật toán nh toán cập nhật đánh giá chất lượng vào sở liệu, sau gửi thơng báo HTTP thành công để xác nhận Các mũi tên chấm peer máy chủ trung tâm mô tả trao đổi thông báo HTTP mạng máy trạm máy chủ drinking His mind was on horses as well as baseball At least he carried lists of [22] horses at all times in his pocket and frequently spoke the names of horses on the telephone.” “He was a great manager,” the boy said “My father thinks he was the greatest.” “Because he came here the most times,” the old man said “If Durocher had continued to come here each year your father would think him the greatest manager.” “Who is the greatest manager, really, Luque or Mike Gonzalez?” “I think they are equal.” “And the best fisherman is you.” “No I know others better.” “Que Va,” the boy said “There are many good fishermen and some great ones But there is only you.” “Thank you You make me happy I hope no fish will come along so great that he will prove us wrong.” “There is no such fish if you are still strong as you say.” “I may not be as strong as I think,” the old man said “But I know many tricks and I have resolution.” “You ought to go to bed now so that you will be fresh in the morning I will take the things back to the Terrace.” [23] “Good night then I will wake you in the morning.” “You’re my alarm clock,” the boy said Ernest Hemingway The Old Man and the Sea “Age is my alarm clock,” the old man said “Why old men wake so early? Is it to have one longer day?” “I don’t know,” the boy said “All I know is that young boys sleep la man said “I’ll waken you in time.” “I not like for him to waken me It is as though I were inferior.” “I know.” “Sleep well old man.” The boy went out They had eaten with no light on the table and the old man took off his trousers and went to bed in the dark He rolled his trousers up to make a pillow, putting the newspaper inside them He rolled himself in the blanket and slept on the other old newspapers that covered the springs of the bed He was asleep in a short time and he dreamed of Africa when he was a boy and the long golden beaches and the white beaches, so white they hurt your eyes, and the high capes and the great brown mountains He lived along that coast now every night and in his dreams he heard the surf roar and saw the native boats [24] come riding through it He smelled the tar and oakum of the deck as he slept and he smelled the smell of Africa that the land breeze brought at morning Usually when he smelled the land breeze he woke up and dressed to go and wake the boy But tonight the smell of the land breeze came very early and he knew it was too early in his dream and went on dreaming to see the white peaks of the Islands rising from the sea and then he dreamed of the different harbours and roadsteads of the Canary Islands He no longer dreamed of storms, nor of women, nor of great occurrences, n strength, nor of his wife He only dreamed of places now and of the lions on the beach They played like young cats in the dusk and he loved them as he loved the boy He never dreamed about the boy He simply woke, looked out the open door at the moon and unrolled his trousers and put them on He urinated outside the shack and then went up the road to wake the boy He was shivering with the morning cold But he knew he would shiver himself warm and that soon he would be rowing The door of the house where the boy lived was unlocked and he opened it and walked in quietly with his [25] bare feet The boy was asleep on a cot in the first room and the old man could see him clearly with the light that came in from the dying moon He took hold of one foot gently and held it until the boy woke and turned and looked at him The old man nodded and the boy took his trousers from the chair by the bed and, sitting on the bed, pulled them on The old man went out the door and the boy came after him He was sleepy and the old man put his arm across his shoulders and said, “I am sorry.” “Qua Va,” the boy said “It is what a man must do.” They walked down the road to the old man’s shack and all along the road, in the dark, barefoot men were moving, carrying the masts of their boats When they reached the old man’s shack the boy harpoon and gaff and the old man carried the mast with the furled sail on his shoulder “Do you want coffee?” the boy asked “We’ll put the gear in the boat and then get some.” They had coffee from condensed milk cans at an early morning place that served fishermen “How did you sleep old man?” the boy asked He [26] was waking up now although it was still hard for him to leave his sleep “Very well, Manolin,” the old man said “I feel confident today.” “So I,” the boy said “Now I must get your sardines and mine and your fresh baits He brings our gear himself He never wants anyone to carry anything.” “We’re different,” the old man said “I let you carry things when you were five years old.” Thông báo mục êu: Thay đổi thông báo m kiếm thông báo phản hồi để đáp ứng chức yêu cầu, ví dụ: thông báo Chat ChatHit hoạt động tương tự thông báo m kiếm (Query) thông báo phản hồi (QueryHit), ngoại trừ quy trình m kiếm chuyển ếp thông báo 4.4 Triển khai BTS Mạng chia sẻ ngang hàng BTS gồm peer thiết bị di động máy nh kết nối trao đổi liệu với theo cách hoàn toàn phân tán, Hình Các peer sử dụng giao thức Gnutella để tạo thành mạng P2P khơng có cấu Hình Mơ hình triển khai mạng chia sẻ ngang hàng BTS ISSN: 2615 - 9686 Journal of Science - Hong Bang Interna onal University He was an old man who fished alone in a skiff in the Gulf Stream and he had gone eighty-four days now without taking a fish In the first forty days a boy had been with him But after forty days without a fish the boy’s parents had told him that the old man was now definitely and finally salao, which is the worst form of unlucky, and the boy had gone at their orders in another boat which caught three good fish the first week It made the boy sad to see the old man come in each day with his skiff empty and he always went down to help him carry either the coiled lines or the gaff and harpoon and the sail that was furled around the mast The sail was patched with flour sacks and, furled, it looked like the flag of permanent defeat The old man was thin and gaunt with deep wrinkles in the back of his neck The brown blotches of the benevolent skin cancer the sun brings from its [9] reflection on the tropic sea were on his cheeks The blotches ran well down the sides of his face and his hands had the deep-creased scars from handling heavy fish on the cords But none of these scars were fresh They were as old as erosions in a fishless desert Everything about him was old except his eyes and they were the same color as the sea and were cheerful and undefeated “Santiago,” the boy said to him as they climbed the bank from where the skiff w Tạp chí KHOA HỌC - Trường Đại học Quốc tế Hồng Bàng Số 14 - 01/2021: 1-12 We’ve made some money.” The old man had taught the boy to fish and the boy loved him “No,” the old man said “You’re with a lucky boat Stay with them.” “But remember how you went eighty-seven days without fish and then we caught big ones every day for three weeks.” “I remember,” the old man said “I know you did not leave me because you doubted.” “It was papa made me leave I am a boy and I must obey him.” “I know,” the old man said “It is quite normal.” “He hasn’t much faith.” [10] “No,” the old man said “But we have Haven’t we?” ‘Yes,” the boy said “Can I offer you a beer on the Terrace and then we’ll take the stuff home.” “Why not?” the old man said “Between fishermen.” They sat on the Terrace and many of the fishermen made fun of the old man and he was not angry Others, of the older fishermen, looked at him and were sad But they did not show it and they spoke politely about the current and the depths they had drifted their lines at and the steady good weather and of what they had seen The successful fishermen of that day were already in and had butchered their marlin out and carried them laid full length across two planks, with two men Ernest Hemingway The Old Man and the Sea staggering at the end of each plank, to the fish house where they waited for the ice truck to carry them to the market in Ha taken them to the shark factory on the other side of the cove where they were hoisted on a block and tackle, their livers removed, their fins cut off and their hides skinned out and their flesh cut into strips for salting When the wind was in the east a smell came across the harbour from the shark factory; but today there [11] was only the faint edge of the odour because the wind had backed into the north and then dropped off and it was pleasant and sunny on the Terrace “Santiago,” the boy said “Yes,” the old man said He was holding his glass and thinking of many years ago “Can I go out to get sardines for you for tomorrow?” “No Go and play baseball I can still row and Rogelio will throw the net.” “I would like to go If I cannot fish with you I would like to serve in some way.” “You bought me a beer,” the old man said “You are already a man.” “How old was I when you first took me in a boat?” “Five and you nearly were killed when I brought the fish in too green and he nearly tore the boat to pieces Can you remember?” “I can remember the tail slapping and banging and the thwart breaking and the noise of the clubbing I can remember you throwing me into the bow where the wet coiled lines were and feeling the whole boat shiver and the noise of you clubbing him like chopping a tree down and the sweet blood smell all over me.” [12] “Can it to you?” “I remember everything from when we first went together.” The old man looked at him with his sun-burned, confident loving eyes “If you were my boy I’d take you out and gamble,” he said “But you are your father’s and your mother’s and you are in a lucky boat.” “May I get the sardines? I know where I can get four baits too.” “I have mine left from today I put them in salt in the box.” “Let me get four fresh ones.” “One,” the old man said His hope and his confidence had never gone But now they were freshening as when the breeze rises “Two,” the boy said “Two,” the old man agreed “You didn’t steal them?” “I would,” the boy said “But I bought these.” “Thank you,” the old man said He was too simple to wonder when he had attained humility But he [13] knew he had attained it and he knew it was not disgraceful and it carried no loss of true pride “Tomorrow is going to be a good day with this current,” he said “Where are you going?” the boy asked “Far out to come in when the wind shifts I want to be out before it is light.” “I’ll try to get him to work far out,” the boy said “Then if you hook something truly big we can come to your aid.” “He does not like to work too far out.” “No,” the boy said “But I will see something that he cannot see such as a bird working and get him to come out after dolphin.” “Are his eyes that bad?” “He is ĐÁNH GIÁ THỬ NGHIỆM Chúng phát triển ứng dụng BTS thiết lập mạng P2P hỗ trợ thiết bị di động với máy chủ trung tâm phục vụ hoạt động đánh giá chất lượng khởi tạo mạng P2P Ứng dụng BTS cài đặt chương trình giả lập Android, đó, ứng dụng di động máy nh kết nối với mạng P2P vai trị peer Lưu ý kết nối peer thiết bị di động địi hỏi mạng khơng dây said “He never went turtle-ing That is what kills the eyes.” “But you went turtle-ing for years off the Mosquito Coast and your eyes are good.” Ernest Hemingway The Old Man and the Sea “I am a strange old man” “But are you strong enough now for a truly big fish?” “I think so And there are many tricks.” [14] “Let us take the stuff home,” the boy said “So I can get the cast net and go after the sardines.” They picked up the gear from the boat The old man carried the mast on his shoulder and the boy carried the wooden boat with the coiled, hard-braided brown lines, the gaff and the harpoon with its shaft The box with the baits was under the stern of the skiff along with the club that was used to subdue the big fish when they were brought alongside No one would steal from the old man but it was better to take the sail and the heavy lines home as the dew was bad for them and, though he was quite sure no local people would steal from him, the old man thought that a gaff and a harpoon were needless temptations to leave in a boat They walked up the road together to the old man’s shack and went in through its open door The old man leaned the mast with its wrapped sail against the wall and the boy put the box and the other gear beside it The mast was nearly as long as the one room of the shack The shack was made of the toug called guano and in it there was a bed, a table, one chair, and a place on the dirt floor to cook with charcoal On the brown walls of the flattened, overlapping leaves of the sturdy fibered [15] guano there was a picture in color of the Sacred Heart of Jesus and another of the Virgin of Cobre These were relics of his wife Once there had been a tinted photograph of his wife on the wall but he had taken it down because it made him too lonely to see it and it was on the shelf in the corner under his clean shirt “What you have to eat?” the boy asked “A pot of yellow rice with fish Do you want some?” “No I will eat at home Do you want me to make the fire?” “No I will make it later on Or I may eat the rice cold.” “May I take the cast net?” “Of course.” There was no cast net and the boy remembered when they had sold it But they went through this fiction every day There was no pot of yellow rice and fish and the boy knew this too “Eighty-five is a lucky number,” the old man said “How would you like to see me bring one in that dressed out over a thousand pounds?” “I’ll get the cast net and go for sardines Will you sit in the sun in the doorway?” [16] “Yes I have yesterday’s paper and I will read the baseball.” The boy did not know whether yesterday’s paper was a fiction too But the old man brought it out from under the bed “Perico gave it t back when I have the sardines I’ll keep yours and mine together on ice and we can share them in the morning When I come back you can tell me about the baseball.” “The Yankees cannot lose.” “But I fear the Indians of Cleveland.” “Have faith in the Yankees my son Think of the great DiMaggio.” “I fear both the Tigers of Detroit and the Indians of Cleveland.” “Be careful or you will fear even the Reds of Cincinnati and the White Sax of Chicago.” “You study it and tell me when I come back.” “Do you think we should buy a terminal of the lottery with an eighty-five? Tomorrow is the eighty-fifth day.” “We can that,” the boy said “But what about the eighty-seven of your great record?” [17] “It could not happen twice Do you think you can find an eighty-five?” Ernest Hemingway The Old Man and the Sea “I can order one “One sheet That’s two dollars and a half Who can we borrow that from?” “That’s easy I can always borrow two dollars and a half.” “I think perhaps I can too But I try not to borrow First you borrow Then you beg.” “Keep warm old man,” the boy said “Remember we are in September.” “The month when the great fish come,” the old man said “Anyone can be a fisherman in May.” “I go now for the sardines,” the boy said When the boy came back the old man was asleep in the chair and the sun was down The boy took the over the back of the chair and over the old man’s shoulders They were strange shoulders, still powerful although very old, and the neck was still strong too and the creases did not show so much when the old man was asleep and his head fallen forward His shirt had been patched so many times that it was like the sail and the patches were faded to many different shades by the sun The [18] old man’s head was very old though and with his eyes closed there was no life in his face The newspaper lay across his knees and the weight of his arm held it there in the evening breeze He was barefooted The boy left him there and when he came back the old man was still asleep “Wake up old man,” the boy said and put his hand on one of the old man’s knees The old man opened his eyes and for a moment he was coming back from a long way away Then he smiled “What have you got?” he asked “Supper,” said the boy “We’re going to have supper.” “I’m not very hungry.” “Come on and eat You can’t fish and not eat.” “I have,” the old man said getting up and taking the newspaper and folding it Then he started to fold the blanket “Keep the blanket around you,” the boy said “You’ll not fish without eating while I’m alive.” “Then live a long time and take care of yourself,” the old man said “What are we eating?” “Black beans and rice, fried ba brought them in a two-decker metal container from the Terrace The two sets of knives and forks and spoons were in his pocket with a paper napkin wrapped around each set “Who gave this to you?” “Martin The owner.” “I must thank him.” “I thanked him already,” the boy said “You don’t need to thank him.” “I’ll give him the belly meat of a big fish,” the old man said “Has he done this for us more than once?” “I think so.” “I must give him something more than the belly meat then He is very thoughtful for us.” “He sent two beers.” “I like the beer in cans best.” “I know But this is in bottles, Hatuey beer, and I take back the bottles.” “That’s very kind of you,” the old man said “Should we eat?” “I’ve been asking you to,” the boy told him gently “I have not wished to open the container until you were ready.” [20] “I’m ready now,” the old man said “I only needed time to wash.” Where did you wash? the boy thought The village water supply was two streets down the road I must have water here for him, the boy thought, and soap and a good towel Why am I so Ernest Hemingway The Old Man and the Sea thoughtless? I must get him another shirt and a jacket for the winter and some sort of shoes and another blanket “Your stew is excellent,” the old man said “Tell me about the baseball,” the boy asked him “In the American League it is the Yan “They lost today,” the boy told him “That means nothing The great DiMaggio is himself again.” “They have other men on the team.” “Naturally But he makes the difference In the other league, between Brooklyn and Philadelphia I must take Brooklyn But then I think of Dick Sisler and those great drives In the old park.” “There was nothing ever like them He hits the longest ball I have ever seen.” “Do you remember when he used to come to the Terrace?” [21] “I wanted to take him fishing but I was too timid to ask him Then I asked you to ask him and you were too timid.” “I know It was a great mistake He might have gone with us Then we would have that for all of our lives.” “I would like to take the great DiMaggio fishing,” the old man said “They say his father was a fisherman Maybe he was as poor as we are and would understand.” “The great Sisler’s father was never poor and he, the father, was playing in the Big Leagues when he was my age.” “When I was your age I was before the mast on a square rigged ship that ran to Africa and I have seen lions on the beaches in the evening.” “I know You told me.” “Should we talk about Africa or about baseball?” “Baseball I think,” the boy said “Tell me about the great John J McGraw.” He said Jota for J “He used to come to the Terrace sometimes too in the older days But he was rough and drinking His mind was on horses as well as baseball At least he carried lists of [22] horses at all times in his pocket and frequently spoke the names of horses on the telephone.” “He was a great manager,” the boy said “My father thinks he was the greatest.” “Because he came here the most times,” the old man said “If Durocher had continued to come here each year your father would think him the greatest manager.” “Who is the greatest manager, really, Luque or Mike Gonzalez?” “I think they are equal.” “And the best fisherman is you.” “No I know others better.” “Que Va,” the boy said “There are many good fishermen and some great ones But there is only you.” “Thank you You make me happy I hope no fish will come along so great that he will prove us wrong.” “There is no such fish if you are still strong as you say.” “I may not be as strong as I think,” the old man said “But I know many tricks and I have resolution.” “You ought to go to bed now so that you will be fresh in the morning I will take the things back to the Terrace.” [23] “Good night then I will wake you in the morning.” “You’re my alarm clock,” the boy said Ernest Hemingway The Old Man and the Sea “Age is my alarm clock,” the old man said “Why old men wake so early? Is it to have one longer day?” “I don’t know,” the boy said “All I know is that young boys sleep la man said “I’ll waken you in time.” “I not like for him to waken me It is as though I were inferior.” “I know.” “Sleep well old man.” The boy went out They had eaten with no light on the table and the old man took off his trousers and went to bed in the dark He rolled his trousers up to make a pillow, putting the newspaper inside them He rolled himself in the blanket and slept on the other old newspapers that covered the springs of the bed He was asleep in a short time and he dreamed of Africa when he was a boy and the long golden beaches and the white beaches, so white they hurt your eyes, and the high capes and the great brown mountains He lived along that coast now every night and in his dreams he heard the surf roar and saw the native boats [24] come riding through it He smelled the tar and oakum of the deck as he slept and he smelled the smell of Africa that the land breeze brought at morning Usually when he smelled the land breeze he woke up and dressed to go and wake the boy But tonight the smell of the land breeze came very early and he knew it was too early in his dream and went on dreaming to see the white peaks of the Islands rising from the sea and then he dreamed of the different harbours and roadsteads of the Canary Islands He no longer dreamed of storms, nor of women, nor of great occurrences, n strength, nor of his wife He only dreamed of places now and of the lions on the beach They played like young cats in the dusk and he loved them as he loved the boy He never dreamed about the boy He simply woke, looked out the open door at the moon and unrolled his trousers and put them on He urinated outside the shack and then went up the road to wake the boy He was shivering with the morning cold But he knew he would shiver himself warm and that soon he would be rowing The door of the house where the boy lived was unlocked and he opened it and walked in quietly with his [25] bare feet The boy was asleep on a cot in the first room and the old man could see him clearly with the light that came in from the dying moon He took hold of one foot gently and held it until the boy woke and turned and looked at him The old man nodded and the boy took his trousers from the chair by the bed and, sitting on the bed, pulled them on The old man went out the door and the boy came after him He was sleepy and the old man put his arm across his shoulders and said, “I am sorry.” “Qua Va,” the boy said “It is what a man must do.” They walked down the road to the old man’s shack and all along the road, in the dark, barefoot men were moving, carrying the masts of their boats When they reached the old man’s shack the boy harpoon and gaff and the old man carried the mast with the furled sail on his shoulder “Do you want coffee?” the boy asked “We’ll put the gear in the boat and then get some.” They had coffee from condensed milk cans at an early morning place that served fishermen “How did you sleep old man?” the boy asked He [26] was waking up now although it was still hard for him to leave his sleep “Very well, Manolin,” the old man said “I feel confident today.” “So I,” the boy said “Now I must get your sardines and mine and your fresh baits He brings our gear himself He never wants anyone to carry anything.” “We’re different,” the old man said “I let you carry things when you were five years old.” Hình Giao diện ứng dụng BTS thiết bị di động Gửi đánh giá chất lượng peer lên máy chủ cách sử dụng yêu cầu HTTP POST Chúng kiểm tra khả sẵn sàng dịch vụ (service availability) mạng thử nghiệm Khả sẵn sàng dịch vụ phụ thuộc lớn vào kết nối ứng dụng di động bị ảnh hưởng số lý bao gồm nguồn lượng, n hiệu đường truyền mạng, lực hệ thống , v.v Chúng sử dụng phòng thực hành gồm 40 máy nh số thiết bị di động để mô mạng P2P quy mô nhỏ gồm 50 peer cài đặt máy trạm ảo Quy mô đủ điều kiện để thực thử nghiệm lỗi kết nối thời gian m kiếm Mạng P2P lớn thời gian m kiếm giảm lỗi kết nối quan trọng nh chất kết nối linh hoạt peer Trong peer thiết lập để thực hoạt động kết nối truyền liệu cách tự động, đo lường lỗi kết nối ứng dụng di động, minh họa Hình 10 bên trái Mạng có điều khiển bao gồm xử lý độ trễ gói n cách sử dụng cơng cụ điều khiển lưu lượng Journal of Science - Hong Bang Interna onal University ISSN: 2615 - 9686 Hình mô tả giao diện người dùng đồ họa ứng dụng BTS Khi nhận địa IP peer lân cận, ứng dụng BTS vai trò peer kết nối với địa IP để đạt số lượng tối đa kết nối peer lân cận định kỳ kiểm tra (sử dụng thông báo ping/pong) tồn peer lân cận đồng thời cập nhật trạng thái Quá trình quảng cáo m kiếm tài nguyên sách diễn đề cập Do mạng P2P thí nghiệm có kích thước tương đối nhỏ nên thời gian m kiếm sách nhanh Máy chủ trung tâm đóng vai trị quan trọng việc lưu trữ peer thường trực cập nhật đánh giá chất lượng peer Hai chức cho phép peer liên hệ với máy chủ trung tâm là: Nhận đánh giá chất lượng thông qua số điện thoại định danh peer cách sử dụng yêu cầu HTTP GET He was an old man who fished alone in a skiff in the Gulf Stream and he had gone eighty-four days now without taking a fish In the first forty days a boy had been with him But after forty days without a fish the boy’s parents had told him that the old man was now definitely and finally salao, which is the worst form of unlucky, and the boy had gone at their orders in another boat which caught three good fish the first week It made the boy sad to see the old man come in each day with his skiff empty and he always went down to help him carry either the coiled lines or the gaff and harpoon and the sail that was furled around the mast The sail was patched with flour sacks and, furled, it looked like the flag of permanent defeat The old man was thin and gaunt with deep wrinkles in the back of his neck The brown blotches of the benevolent skin cancer the sun brings from its [9] reflection on the tropic sea were on his cheeks The blotches ran well down the sides of his face and his hands had the deep-creased scars from handling heavy fish on the cords But none of these scars were fresh They were as old as erosions in a fishless desert Everything about him was old except his eyes and they were the same color as the sea and were cheerful and undefeated “Santiago,” the boy said to him as they climbed the bank from where the skiff w 10 Tạp chí KHOA HỌC - Trường Đại học Quốc tế Hồng Bàng Số 14 - 01/2021: 1-12 We’ve made some money.” The old man had taught the boy to fish and the boy loved him “No,” the old man said “You’re with a lucky boat Stay with them.” “But remember how you went eighty-seven days without fish and then we caught big ones every day for three weeks.” “I remember,” the old man said “I know you did not leave me because you doubted.” “It was papa made me leave I am a boy and I must obey him.” “I know,” the old man said “It is quite normal.” “He hasn’t much faith.” [10] “No,” the old man said “But we have Haven’t we?” ‘Yes,” the boy said “Can I offer you a beer on the Terrace and then we’ll take the stuff home.” “Why not?” the old man said “Between fishermen.” They sat on the Terrace and many of the fishermen made fun of the old man and he was not angry Others, of the older fishermen, looked at him and were sad But they did not show it and they spoke politely about the current and the depths they had drifted their lines at and the steady good weather and of what they had seen The successful fishermen of that day were already in and had butchered their marlin out and carried them laid full length across two planks, with two men Ernest Hemingway The Old Man and the Sea staggering at the end of each plank, to the fish house where they waited for the ice truck to carry them to the market in Ha taken them to the shark factory on the other side of the cove where they were hoisted on a block and tackle, their livers removed, their fins cut off and their hides skinned out and their flesh cut into strips for salting When the wind was in the east a smell came across the harbour from the shark factory; but today there [11] was only the faint edge of the odour because the wind had backed into the north and then dropped off and it was pleasant and sunny on the Terrace “Santiago,” the boy said “Yes,” the old man said He was holding his glass and thinking of many years ago “Can I go out to get sardines for you for tomorrow?” “No Go and play baseball I can still row and Rogelio will throw the net.” “I would like to go If I cannot fish with you I would like to serve in some way.” “You bought me a beer,” the old man said “You are already a man.” “How old was I when you first took me in a boat?” “Five and you nearly were killed when I brought the fish in too green and he nearly tore the boat to pieces Can you remember?” “I can remember the tail slapping and banging and the thwart breaking and the noise of the clubbing I can remember you throwing me into the bow where the wet coiled lines were and feeling the whole boat shiver and the noise of you clubbing him like chopping a tree down and the sweet blood smell all over me.” [12] “Can it to you?” “I remember everything from when we first went together.” The old man looked at him with his sun-burned, confident loving eyes “If you were my boy I’d take you out and gamble,” he said “But you are your father’s and your mother’s and you are in a lucky boat.” “May I get the sardines? I know where I can get four baits too.” “I have mine left from today I put them in salt in the box.” “Let me get four fresh ones.” “One,” the old man said His hope and his confidence had never gone But now they were freshening as when the breeze rises “Two,” the boy said “Two,” the old man agreed “You didn’t steal them?” “I would,” the boy said “But I bought these.” “Thank you,” the old man said He was too simple to wonder when he had attained humility But he [13] knew he had attained it and he knew it was not disgraceful and it carried no loss of true pride “Tomorrow is going to be a good day with this current,” he said “Where are you going?” the boy asked “Far out to come in when the wind shifts I want to be out before it is light.” “I’ll try to get him to work far out,” the boy said “Then if you hook something truly big we can come to your aid.” “He does not like to work too far out.” “No,” the boy said “But I will see something that he cannot see such as a bird working and get him to come out after dolphin.” “Are his eyes that bad?” “He is said “He never went turtle-ing That is what kills the eyes.” “But you went turtle-ing for years off the Mosquito Coast and your eyes are good.” Ernest Hemingway The Old Man and the Sea “I am a strange old man” “But are you strong enough now for a truly big fish?” “I think so And there are many tricks.” [14] “Let us take the stuff home,” the boy said “So I can get the cast net and go after the sardines.” They picked up the gear from the boat The old man carried the mast on his shoulder and the boy carried the wooden boat with the coiled, hard-braided brown lines, the gaff and the harpoon with its shaft The box with the baits was under the stern of the skiff along with the club that was used to subdue the big fish when they were brought alongside No one would steal from the old man but it was better to take the sail and the heavy lines home as the dew was bad for them and, though he was quite sure no local people would steal from him, the old man thought that a gaff and a harpoon were needless temptations to leave in a boat They walked up the road together to the old man’s shack and went in through its open door The old man leaned the mast with its wrapped sail against the wall and the boy put the box and the other gear beside it The mast was nearly as long as the one room of the shack The shack was made of the toug called guano and in it there was a bed, a table, one chair, and a place on the dirt floor to cook with charcoal On the brown walls of the flattened, overlapping leaves of the sturdy fibered [15] guano there was a picture in color of the Sacred Heart of Jesus and another of the Virgin of Cobre These were relics of his wife Once there had been a tinted photograph of his wife on the wall but he had taken it down because it made him too lonely to see it and it was on the shelf in the corner under his clean shirt “What you have to eat?” the boy asked “A pot of yellow rice with fish Do you want some?” “No I will eat at home Do you want me to make the fire?” “No I will make it later on Or I may eat the rice cold.” “May I take the cast net?” “Of course.” There was no cast net and the boy remembered when they had sold it But they went through this fiction every day There was no pot of yellow rice and fish and the boy knew this too “Eighty-five is a lucky number,” the old man said “How would you like to see me bring one in that dressed out over a thousand pounds?” “I’ll get the cast net and go for sardines Will you sit in the sun in the doorway?” [16] “Yes I have yesterday’s paper and I will read the baseball.” The boy did not know whether yesterday’s paper was a fiction too But the old man brought it out from under the bed “Perico gave it t back when I have the sardines I’ll keep yours and mine together on ice and we can share them in the morning When I come back you can tell me about the baseball.” “The Yankees cannot lose.” “But I fear the Indians of Cleveland.” “Have faith in the Yankees my son Think of the great DiMaggio.” “I fear both the Tigers of Detroit and the Indians of Cleveland.” “Be careful or you will fear even the Reds of Cincinnati and the White Sax of Chicago.” “You study it and tell me when I come back.” “Do you think we should buy a terminal of the lottery with an eighty-five? Tomorrow is the eighty-fifth day.” “We can that,” the boy said “But what about the eighty-seven of your great record?” [17] “It could not happen twice Do you think you can find an eighty-five?” Ernest Hemingway The Old Man and the Sea “I can order one “One sheet That’s two dollars and a half Who can we borrow that from?” “That’s easy I can always borrow two dollars and a half.” “I think perhaps I can too But I try not to borrow First you borrow Then you beg.” “Keep warm old man,” the boy said “Remember we are in September.” “The month when the great fish come,” the old man said “Anyone can be a fisherman in May.” “I go now for the sardines,” the boy said When the boy came back the old man was asleep in the chair and the sun was down The boy took the over the back of the chair and over the old man’s shoulders They were strange shoulders, still powerful although very old, and the neck was still strong too and the creases did not show so much when the old man was asleep and his head fallen forward His shirt had been patched so many times that it was like the sail and the patches were faded to many different shades by the sun The [18] old man’s head was very old though and with his eyes closed there was no life in his face The newspaper lay across his knees and the weight of his arm held it there in the evening breeze He was barefooted The boy left him there and when he came back the old man was still asleep “Wake up old man,” the boy said and put his hand on one of the old man’s knees The old man opened his eyes and for a moment he was coming back from a long way away Then he smiled “What have you got?” he asked “Supper,” said the boy “We’re going to have supper.” “I’m not very hungry.” “Come on and eat You can’t fish and not eat.” “I have,” the old man said getting up and taking the newspaper and folding it Then he started to fold the blanket “Keep the blanket around you,” the boy said “You’ll not fish without eating while I’m alive.” “Then live a long time and take care of yourself,” the old man said “What are we eating?” “Black beans and rice, fried ba brought them in a two-decker metal container from the Terrace The two sets of knives and forks and spoons were in his pocket with a paper napkin wrapped around each set “Who gave this to you?” “Martin The owner.” “I must thank him.” “I thanked him already,” the boy said “You don’t need to thank him.” “I’ll give him the belly meat of a big fish,” the old man said “Has he done this for us more than once?” “I think so.” “I must give him something more than the belly meat then He is very thoughtful for us.” “He sent two beers.” “I like the beer in cans best.” “I know But this is in bottles, Hatuey beer, and I take back the bottles.” “That’s very kind of you,” the old man said “Should we eat?” “I’ve been asking you to,” the boy told him gently “I have not wished to open the container until you were ready.” [20] “I’m ready now,” the old man said “I only needed time to wash.” Where did you wash? the boy thought The village water supply was two streets down the road I must have water here for him, the boy thought, and soap and a good towel Why am I so Ernest Hemingway The Old Man and the Sea thoughtless? I must get him another shirt and a jacket for the winter and some sort of shoes and another blanket “Your stew is excellent,” the old man said “Tell me about the baseball,” the boy asked him “In the American League it is the Yan “They lost today,” the boy told him “That means nothing The great DiMaggio is himself again.” “They have other men on the team.” “Naturally But he makes the difference In the other league, between Brooklyn and Philadelphia I must take Brooklyn But then I think of Dick Sisler and those great drives In the old park.” “There was nothing ever like them He hits the longest ball I have ever seen.” “Do you remember when he used to come to the Terrace?” [21] “I wanted to take him fishing but I was too timid to ask him Then I asked you to ask him and you were too timid.” “I know It was a great mistake He might have gone with us Then we would have that for all of our lives.” “I would like to take the great DiMaggio fishing,” the old man said “They say his father was a fisherman Maybe he was as poor as we are and would understand.” “The great Sisler’s father was never poor and he, the father, was playing in the Big Leagues when he was my age.” “When I was your age I was before the mast on a square rigged ship that ran to Africa and I have seen lions on the beaches in the evening.” “I know You told me.” “Should we talk about Africa or about baseball?” “Baseball I think,” the boy said “Tell me about the great John J McGraw.” He said Jota for J “He used to come to the Terrace sometimes too in the older days But he was rough and drinking His mind was on horses as well as baseball At least he carried lists of [22] horses at all times in his pocket and frequently spoke the names of horses on the telephone.” “He was a great manager,” the boy said “My father thinks he was the greatest.” “Because he came here the most times,” the old man said “If Durocher had continued to come here each year your father would think him the greatest manager.” “Who is the greatest manager, really, Luque or Mike Gonzalez?” “I think they are equal.” “And the best fisherman is you.” “No I know others better.” “Que Va,” the boy said “There are many good fishermen and some great ones But there is only you.” “Thank you You make me happy I hope no fish will come along so great that he will prove us wrong.” “There is no such fish if you are still strong as you say.” “I may not be as strong as I think,” the old man said “But I know many tricks and I have resolution.” “You ought to go to bed now so that you will be fresh in the morning I will take the things back to the Terrace.” [23] “Good night then I will wake you in the morning.” “You’re my alarm clock,” the boy said Ernest Hemingway The Old Man and the Sea “Age is my alarm clock,” the old man said “Why old men wake so early? Is it to have one longer day?” “I don’t know,” the boy said “All I know is that young boys sleep la man said “I’ll waken you in time.” “I not like for him to waken me It is as though I were inferior.” “I know.” “Sleep well old man.” The boy went out They had eaten with no light on the table and the old man took off his trousers and went to bed in the dark He rolled his trousers up to make a pillow, putting the newspaper inside them He rolled himself in the blanket and slept on the other old newspapers that covered the springs of the bed He was asleep in a short time and he dreamed of Africa when he was a boy and the long golden beaches and the white beaches, so white they hurt your eyes, and the high capes and the great brown mountains He lived along that coast now every night and in his dreams he heard the surf roar and saw the native boats [24] come riding through it He smelled the tar and oakum of the deck as he slept and he smelled the smell of Africa that the land breeze brought at morning Usually when he smelled the land breeze he woke up and dressed to go and wake the boy But tonight the smell of the land breeze came very early and he knew it was too early in his dream and went on dreaming to see the white peaks of the Islands rising from the sea and then he dreamed of the different harbours and roadsteads of the Canary Islands He no longer dreamed of storms, nor of women, nor of great occurrences, n strength, nor of his wife He only dreamed of places now and of the lions on the beach They played like young cats in the dusk and he loved them as he loved the boy He never dreamed about the boy He simply woke, looked out the open door at the moon and unrolled his trousers and put them on He urinated outside the shack and then went up the road to wake the boy He was shivering with the morning cold But he knew he would shiver himself warm and that soon he would be rowing The door of the house where the boy lived was unlocked and he opened it and walked in quietly with his [25] bare feet The boy was asleep on a cot in the first room and the old man could see him clearly with the light that came in from the dying moon He took hold of one foot gently and held it until the boy woke and turned and looked at him The old man nodded and the boy took his trousers from the chair by the bed and, sitting on the bed, pulled them on The old man went out the door and the boy came after him He was sleepy and the old man put his arm across his shoulders and said, “I am sorry.” “Qua Va,” the boy said “It is what a man must do.” They walked down the road to the old man’s shack and all along the road, in the dark, barefoot men were moving, carrying the masts of their boats When they reached the old man’s shack the boy harpoon and gaff and the old man carried the mast with the furled sail on his shoulder “Do you want coffee?” the boy asked “We’ll put the gear in the boat and then get some.” They had coffee from condensed milk cans at an early morning place that served fishermen “How did you sleep old man?” the boy asked He [26] was waking up now although it was still hard for him to leave his sleep “Very well, Manolin,” the old man said “I feel confident today.” “So I,” the boy said “Now I must get your sardines and mine and your fresh baits He brings our gear himself He never wants anyone to carry anything.” “We’re different,” the old man said “I let you carry things when you were five years old.” Hình 10 Lỗi kết nối peer khoảng thời gian khác (bên trái); Thời gian m kiếm sách với nhiều thông báo m kiếm khác (bên phải) Trong vòng 180 phút, số lượng peer giảm khoảng 20% mạng có điều khiển 10% mạng khơng có điều khiển Thử nghiệm tương tự số lượng giới hạn peer Internet có kết kết nối không ổn định khoảng thời gian 30 phút Lỗi kết nối ảnh hưởng lớn đến nh sẵn sàng dịch vụ peer rời mạng P2P biệt mạng P2P không cấu trúc bao gồm chế m kiếm linh hoạt dựa từ khóa ngữ nghĩa Hai vấn đề cịn lại peer có thường xuyên kết nối trực tuyến để đảm bảo tài nguyên sẵn sàng thời gian để thông báo m kiếm gửi đến peer liên quan đến khả sẵn sàng tồn dịch vụ Chúng đo lường hiệu suất m kiếm mạng P2P Phản hồi nhanh điều kiện cần thiết cho khả tồn dịch vụ (service survivability) peer cần kết m kiếm nhanh Chúng sử dụng nhiều thông báo m kiếm với nhiều chí khác mạng P2P để đo đạc thời gian thụ, minh họa Hình 10 phía bên phải Một peer trung bình 2,6 giây để thu nhận thông báo phản hồi cho thông báo m kiếm Lưu ý peer rời tham gia mạng tự động trình thực hoạt động m kiếm sách Có đánh đổi thời gian thụ khả ếp cận peer (dẫn đến số lượng thông báo phản hồi tăng) Khi số lượng peer lân cận tăng lên, số lượng peer nhận thông báo m kiếm tăng lên, khả gửi thông báo phản hồi tăng thời gian thụ cho thông báo m kiếm tăng lên thời gian thụ trung bình cho thơng báo phản hồi giảm Ngoài ra, mạng P2P hiệu việc chia sẻ m kiếm tài nguyên, nghĩa peer lưu giữ tài nguyên cần m peer kết nối trực tuyến, peer khác chắn m thấy tài nguyên này, đặc KẾT LUẬN Mơ hình thương mại điện tử B2C áp dụng thành công cho nhiều miền ứng dụng, mơ hình thương mại điện tử C2C gần thu hút cơng ty người dùng, ví dụ ứng dụng kinh tế chia sẻ, bán lẻ trực tuyến Facebook Các mơ hình chứa đựng vấn đề kiểm sốt quản lý tập trung Chúng tơi đề xuất mơ hình thương mại điện tử C2C phi tập trung tận dụng đặc điểm đáng ý mạng P2P để loại bỏ vấn đề này, cải thiện số vấn đề bao gồm bảo trì cơng nghệ, máy chủ trung tâm, chuyển tảng di động, kiểm soát chất lượng, chi phí bổ sung, dịch vụ tốn trung gian, v.v Chúng cung cấp thiết kế Dịch vụ mua bán sách sử dụng giao thức Gnutella nguyên mẫu ứng dụng BTS tảng di động Android Mơ hình thiết kế đề xuất áp dụng cho số lĩnh vực ứng dụng, nơi việc giao dịch sách trường đại học thử nghiệm Chúng chứng minh chức ứng dụng điển hình đánh giá khả sẵn sàng hiệu suất m kiếm dịch vụ mạng ISSN: 2615 - 9686 Journal of Science - Hong Bang Interna onal University He was an old man who fished alone in a skiff in the Gulf Stream and he had gone eighty-four days now without taking a fish In the first forty days a boy had been with him But after forty days without a fish the boy’s parents had told him that the old man was now definitely and finally salao, which is the worst form of unlucky, and the boy had gone at their orders in another boat which caught three good fish the first week It made the boy sad to see the old man come in each day with his skiff empty and he always went down to help him carry either the coiled lines or the gaff and harpoon and the sail that was furled around the mast The sail was patched with flour sacks and, furled, it looked like the flag of permanent defeat The old man was thin and gaunt with deep wrinkles in the back of his neck The brown blotches of the benevolent skin cancer the sun brings from its [9] reflection on the tropic sea were on his cheeks The blotches ran well down the sides of his face and his hands had the deep-creased scars from handling heavy fish on the cords But none of these scars were fresh They were as old as erosions in a fishless desert Everything about him was old except his eyes and they were the same color as the sea and were cheerful and undefeated “Santiago,” the boy said to him as they climbed the bank from where the skiff w Tạp chí KHOA HỌC - Trường Đại học Quốc tế Hồng Bàng Số 14 - 01/2021: 1-12 11 We’ve made some money.” The old man had taught the boy to fish and the boy loved him “No,” the old man said “You’re with a lucky boat Stay with them.” “But remember how you went eighty-seven days without fish and then we caught big ones every day for three weeks.” “I remember,” the old man said “I know you did not leave me because you doubted.” “It was papa made me leave I am a boy and I must obey him.” “I know,” the old man said “It is quite normal.” “He hasn’t much faith.” [10] “No,” the old man said “But we have Haven’t we?” ‘Yes,” the boy said “Can I offer you a beer on the Terrace and then we’ll take the stuff home.” “Why not?” the old man said “Between fishermen.” They sat on the Terrace and many of the fishermen made fun of the old man and he was not angry Others, of the older fishermen, looked at him and were sad But they did not show it and they spoke politely about the current and the depths they had drifted their lines at and the steady good weather and of what they had seen The successful fishermen of that day were already in and had butchered their marlin out and carried them laid full length across two planks, with two men Ernest Hemingway The Old Man and the Sea staggering at the end of each plank, to the fish house where they waited for the ice truck to carry them to the market in Ha taken them to the shark factory on the other side of the cove where they were hoisted on a block and tackle, their livers removed, their fins cut off and their hides skinned out and their flesh cut into strips for salting When the wind was in the east a smell came across the harbour from the shark factory; but today there [11] was only the faint edge of the odour because the wind had backed into the north and then dropped off and it was pleasant and sunny on the Terrace “Santiago,” the boy said “Yes,” the old man said He was holding his glass and thinking of many years ago “Can I go out to get sardines for you for tomorrow?” “No Go and play baseball I can still row and Rogelio will throw the net.” “I would like to go If I cannot fish with you I would like to serve in some way.” “You bought me a beer,” the old man said “You are already a man.” “How old was I when you first took me in a boat?” “Five and you nearly were killed when I brought the fish in too green and he nearly tore the boat to pieces Can you remember?” “I can remember the tail slapping and banging and the thwart breaking and the noise of the clubbing I can remember you throwing me into the bow where the wet coiled lines were and feeling the whole boat shiver and the noise of you clubbing him like chopping a tree down and the sweet blood smell all over me.” [12] “Can it to you?” “I remember everything from when we first went together.” The old man looked at him with his sun-burned, confident loving eyes “If you were my boy I’d take you out and gamble,” he said “But you are your father’s and your mother’s and you are in a lucky boat.” “May I get the sardines? I know where I can get four baits too.” “I have mine left from today I put them in salt in the box.” “Let me get four fresh ones.” “One,” the old man said His hope and his confidence had never gone But now they were freshening as when the breeze rises “Two,” the boy said “Two,” the old man agreed “You didn’t steal them?” “I would,” the boy said “But I bought these.” “Thank you,” the old man said He was too simple to wonder when he had attained humility But he [13] knew he had attained it and he knew it was not disgraceful and it carried no loss of true pride “Tomorrow is going to be a good day with this current,” he said “Where are you going?” the boy asked “Far out to come in when the wind shifts I want to be out before it is light.” “I’ll try to get him to work far out,” the boy said “Then if you hook something truly big we can come to your aid.” “He does not like to work too far out.” “No,” the boy said “But I will see something that he cannot see such as a bird working and get him to come out after dolphin.” “Are his eyes that bad?” “He is P2P hỗ trợ thiết bị di động Kết thử nghiệm cho thấy nh sẵn sàng hiệu cao mơ hình thương mại điện tử C2C đề xuất ứng dụng BTS Tuy nhiên, mơ hình thiếu giải pháp cho số vấn đề áp dụng cho miền ứng dụng cụ thể, ví dụ, kiểm soát người bán người mua lừa đảo, xử lý xung đột người bán người mua cung cấp chế giao dịch hiệu Công việc tương lai tập trung vào việc cải thiện áp dụng mơ hình thiết kế đề xuất cho miền ứng dụng thực tế said “He never went turtle-ing That is what kills the eyes.” “But you went turtle-ing for years off the Mosquito Coast and your eyes are good.” Ernest Hemingway The Old Man and the Sea “I am a strange old man” “But are you strong enough now for a truly big fish?” “I think so And there are many tricks.” [14] “Let us take the stuff home,” the boy said “So I can get the cast net and go after the sardines.” They picked up the gear from the boat The old man carried the mast on his shoulder and the boy carried the wooden boat with the coiled, hard-braided brown lines, the gaff and the harpoon with its shaft The box with the baits was under the stern of the skiff along with the club that was used to subdue the big fish when they were brought alongside No one would steal from the old man but it was better to take the sail and the heavy lines home as the dew was bad for them and, though he was quite sure no local people would steal from him, the old man thought that a gaff and a harpoon were needless temptations to leave in a boat They walked up the road together to the old man’s shack and went in through its open door The old man leaned the mast with its wrapped sail against the wall and the boy put the box and the other gear beside it The mast was nearly as long as the one room of the shack The shack was made of the toug called guano and in it there was a bed, a table, one chair, and a place on the dirt floor to cook with charcoal On the brown walls of the flattened, overlapping leaves of the sturdy fibered [15] guano there was a picture in color of the Sacred Heart of Jesus and another of the Virgin of Cobre These were relics of his wife Once there had been a tinted photograph of his wife on the wall but he had taken it down because it made him too lonely to see it and it was on the shelf in the corner under his clean shirt “What you have to eat?” the boy asked “A pot of yellow rice with fish Do you want some?” “No I will eat at home Do you want me to make the fire?” “No I will make it later on Or I may eat the rice cold.” “May I take the cast net?” “Of course.” There was no cast net and the boy remembered when they had sold it But they went through this fiction every day There was no pot of yellow rice and fish and the boy knew this too “Eighty-five is a lucky number,” the old man said “How would you like to see me bring one in that dressed out over a thousand pounds?” “I’ll get the cast net and go for sardines Will you sit in the sun in the doorway?” [16] “Yes I have yesterday’s paper and I will read the baseball.” The boy did not know whether yesterday’s paper was a fiction too But the old man brought it out from under the bed “Perico gave it t back when I have the sardines I’ll keep yours and mine together on ice and we can share them in the morning When I come back you can tell me about the baseball.” “The Yankees cannot lose.” “But I fear the Indians of Cleveland.” “Have faith in the Yankees my son Think of the great DiMaggio.” “I fear both the Tigers of Detroit and the Indians of Cleveland.” “Be careful or you will fear even the Reds of Cincinnati and the White Sax of Chicago.” “You study it and tell me when I come back.” “Do you think we should buy a terminal of the lottery with an eighty-five? Tomorrow is the eighty-fifth day.” “We can that,” the boy said “But what about the eighty-seven of your great record?” [17] “It could not happen twice Do you think you can find an eighty-five?” Ernest Hemingway The Old Man and the Sea “I can order one “One sheet That’s two dollars and a half Who can we borrow that from?” “That’s easy I can always borrow two dollars and a half.” “I think perhaps I can too But I try not to borrow First you borrow Then you beg.” “Keep warm old man,” the boy said “Remember we are in September.” “The month when the great fish come,” the old man said “Anyone can be a fisherman in May.” “I go now for the sardines,” the boy said When the boy came back the old man was asleep in the chair and the sun was down The boy took the over the back of the chair and over the old man’s shoulders They were strange shoulders, still powerful although very old, and the neck was still strong too and the creases did not show so much when the old man was asleep and his head fallen forward His shirt had been patched so many times that it was like the sail and the patches were faded to many different shades by the sun The [18] old man’s head was very old though and with his eyes closed there was no life in his face The newspaper lay across his knees and the weight of his arm held it there in the evening breeze He was barefooted The boy left him there and when he came back the old man was still asleep “Wake up old man,” the boy said and put his hand on one of the old man’s knees The old man opened his eyes and for a moment he was coming back from a long way away Then he smiled “What have you got?” he asked “Supper,” said the boy “We’re going to have supper.” “I’m not very hungry.” “Come on and eat You can’t fish and not eat.” “I have,” the old man said getting up and taking the newspaper and folding it Then he started to fold the blanket “Keep the blanket around you,” the boy said “You’ll not fish without eating while I’m alive.” “Then live a long time and take care of yourself,” the old man said “What are we eating?” “Black beans and rice, fried ba brought them in a two-decker metal container from the Terrace The two sets of knives and forks and spoons were in his pocket with a paper napkin wrapped around each set “Who gave this to you?” “Martin The owner.” “I must thank him.” “I thanked him already,” the boy said “You don’t need to thank him.” “I’ll give him the belly meat of a big fish,” the old man said “Has he done this for us more than once?” “I think so.” “I must give him something more than the belly meat then He is very thoughtful for us.” “He sent two beers.” “I like the beer in cans best.” “I know But this is in bottles, Hatuey beer, and I take back the bottles.” “That’s very kind of you,” the old man said “Should we eat?” “I’ve been asking you to,” the boy told him gently “I have not wished to open the container until you were ready.” [20] “I’m ready now,” the old man said “I only needed time to wash.” Where did you wash? the boy thought The village water supply was two streets down the road I must have water here for him, the boy thought, and soap and a good towel Why am I so Ernest Hemingway The Old Man and the Sea thoughtless? I must get him another shirt and a jacket for the winter and some sort of shoes and another blanket “Your stew is excellent,” the old man said “Tell me about the baseball,” the boy asked him “In the American League it is the Yan LỜI CẢM ƠN Nghiên cứu tài trợ Trường Đại học Q u ố c t ế H n g B n g v i m ã s ố đ ề tà i GVTC14.1.01 “They lost today,” the boy told him “That means nothing The great DiMaggio is himself again.” “They have other men on the team.” “Naturally But he makes the difference In the other league, between Brooklyn and Philadelphia I must take Brooklyn But then I think of Dick Sisler and those great drives In the old park.” “There was nothing ever like them He hits the longest ball I have ever seen.” “Do you remember when he used to come to the Terrace?” [21] “I wanted to take him fishing but I was too timid to ask him Then I asked you to ask him and you were too timid.” “I know It was a great mistake He might have gone with us Then we would have that for all of our lives.” “I would like to take the great DiMaggio fishing,” the old man said “They say his father was a fisherman Maybe he was as poor as we are and would understand.” “The great Sisler’s father was never poor and he, the father, was playing in the Big Leagues when he was my age.” “When I was your age I was before the mast on a square rigged ship that ran to Africa and I have seen lions on the beaches in the evening.” “I know You told me.” “Should we talk about Africa or about baseball?” “Baseball I think,” the boy said “Tell me about the great John J McGraw.” He said Jota for J “He used to come to the Terrace sometimes too in the older days But he was rough and drinking His mind was on horses as well as baseball At least he carried lists of [22] horses at all times in his pocket and frequently spoke the names of horses on the telephone.” “He was a great manager,” the boy said “My father thinks he was the greatest.” “Because he came here the most times,” the old man said “If Durocher had continued to come here each year your father would think him the greatest manager.” “Who is the greatest manager, really, Luque or Mike Gonzalez?” “I think they are equal.” “And the best fisherman is you.” “No I know others better.” “Que Va,” the boy said “There are many good fishermen and some great ones But there is only you.” “Thank you You make me happy I hope no fish will come along so great that he will prove us wrong.” “There is no such fish if you are still strong as you say.” “I may not be as strong as I think,” the old man said “But I know many tricks and I have resolution.” “You ought to go to bed now so that you will be fresh in the morning I will take the things back to the Terrace.” [23] “Good night then I will wake you in the morning.” “You’re my alarm clock,” the boy said Ernest Hemingway The Old Man and the Sea “Age is my alarm clock,” the old man said “Why old men wake so early? Is it to have one longer day?” “I don’t know,” the boy said “All I know is that young boys sleep la man said “I’ll waken you in time.” “I not like for him to waken me It is as though I were inferior.” “I know.” “Sleep well old man.” The boy went out They had eaten with no light on the table and the old man took off his trousers and went to bed in the dark He rolled his trousers up to make a pillow, putting the newspaper inside them He rolled himself in the blanket and slept on the other old newspapers that covered the springs of the bed He was asleep in a short time and he dreamed of Africa when he was a boy and the long golden beaches and the white beaches, so white they hurt your eyes, and the high capes and the great brown mountains He lived along that coast now every night and in his dreams he heard the surf roar and saw the native boats [24] come riding through it He smelled the tar and oakum of the deck as he slept and he smelled the smell of Africa that the land breeze brought at morning Usually when he smelled the land breeze he woke up and dressed to go and wake the boy But tonight the smell of the land breeze came very early and he knew it was too early in his dream and went on dreaming to see the white peaks of the Islands rising from the sea and then he dreamed of the different harbours and roadsteads of the Canary Islands He no longer dreamed of storms, nor of women, nor of great occurrences, n strength, nor of his wife He only dreamed of places now and of the lions on the beach They played like young cats in the dusk and he loved them as he loved the boy He never dreamed about the boy He simply woke, looked out the open door at the moon and unrolled his trousers and put them on He urinated outside the shack and then went up the road to wake the boy He was shivering with the morning cold But he knew he would shiver himself warm and that soon he would be rowing The door of the house where the boy lived was unlocked and he opened it and walked in quietly with his [25] bare feet The boy was asleep on a cot in the first room and the old man could see him clearly with the light that came in from the dying moon He took hold of one foot gently and held it until the boy woke and turned and looked at him The old man nodded and the boy took his trousers from the chair by the bed and, sitting on the bed, pulled them on The old man went out the door and the boy came after him He was sleepy and the old man put his arm across his shoulders and said, “I am sorry.” “Qua Va,” the boy said “It is what a man must do.” They walked down the road to the old man’s shack and all along the road, in the dark, barefoot men were moving, carrying the masts of their boats When they reached the old man’s shack the boy harpoon and gaff and the old man carried the mast with the furled sail on his shoulder “Do you want coffee?” the boy asked “We’ll put the gear in the boat and then get some.” They had coffee from condensed milk cans at an early morning place that served fishermen “How did you sleep old man?” the boy asked He [26] was waking up now although it was still hard for him to leave his sleep “Very well, Manolin,” the old man said “I feel confident today.” “So I,” the boy said “Now I must get your sardines and mine and your fresh baits He brings our gear himself He never wants anyone to carry anything.” “We’re different,” the old man said “I let you carry things when you were five years old.” TÀI LIỆU THAM KHẢO Airbnb Company (2008) h ps://www.airbnb.com/ Accessed Aug 2020 Alibaba Group (1999) h ps://www.alibabagroup.com/ Accessed Aug 2020 Amazon Company (1994) h ps://www.amazon.com/ Accessed Aug 2020 Androutsellis-Theotokis, S., Spinellis, D (2004) A survey of peer-to-peer content distribu on technologies ACM Comput Surv., 36(4), 335–371 h ps://doi.org/10.1145/1041680.1041681 Carlsson, B., Gustavsson, R (2001) The rise and fall of Napster - an evolu onary approach In: Liu, J., Yuen, P.C., Li, C., Ng, J., Ishida, T (eds.) AMT LNCS, vol 2252, pp 347–354 Springer: Heidelberg h ps://doi.org/10.1007/3-540-45336-9_40 Clarke, I., Sandberg, O., Wiley, B., Hong, T.W (2001) Freenet: a distributed anonymous informa on storage and retrieval system In: Federrath, H (ed.) Designing Privacy Enhancing Technologies LNCS, vol 2009, pp 46–66 Springer: Heidelberg h ps://doi.org/10.1007/3-540-44702-4_4 Cohen, B (2003) Incen ves build robustness in st Bi orrent In: Proceedings of the Workshop on Economics of Peer-to-Peer Systems Craigslist Company (1995) h ps://www.craigslist.org/ Accessed Aug 2020 eBay Company (1995) h ps://www.ebay.org/ Accessed Aug 2020 Gnutella Protocol Specifica on (version 0.4) (2001) h p://rfc-gnutella.sourceforge.net/developer/stable/ Accessed Jan 2017 XOR metric In: Druschel, P., Kaashoek, F., Rowstron, A (eds.) IPTPS 2002 LNCS, vol 2429, pp 53–65 Springer: Heidelberg h ps://doi.org/10.1007/3-540-45748-8_5 Milojicic, D et al (2002) Peer-to-peer compu ng Technical Report HPL-2002-57R1, HP Laboratories, Palo Alto, USA, April 2002 Ratnasamy, S., Francis, P., Handley, M., Karp, R., Schenker, S (2001) A scalable content addressable network In: Proceedings of the Conference on Applica ons, Technologies, Architectures, and Protocols for Computer Communica ons (SIGCOMM 2001), pp 161–172 New York: ACM Press h ps://doi.org/10.1145/964723.383072 Stoica, I., Morris, R., Karger, D., Kaashoek, M.F., Balakrishnan, H (2001) Chord: a scalable peer-to-peer lookup service for internet applica ons In: Proceedings of the Conference on Applica ons, Technologies, Architectures, and Protocols for Computer Communica ons (SIGCOMM 2001), pp – N e w Yo r k : A C M P r e s s h ps://doi.org/10.1145/964723.383071 Sundararajan, A (2014) What Airbnb Gets About Culture That Uber Doesn't Harvard Business Review h ps://hbr.org/2014/11/ what-airbnb-gets-about-culture-that-uber-doesn't Uber Company (2014) h ps://www.uber.com/ Accessed Aug 2020 Walmart Company (1962) h ps://www.walmart.com/ Accessed Aug 2020 Maymounkov, P., Mazières, D (2002) Kademlia: A peer-to-peer informa on system based on the Yang, B., Garcia-Molina, H (2002) Designing a super-peer network Technical report, Stanford University h p://dbpubs.stanford edu/pub/2002-13 Journal of Science - Hong Bang Interna onal University ISSN: 2615 - 9686 He was an old man who fished alone in a skiff in the Gulf Stream and he had gone eighty-four days now without taking a fish In the first forty days a boy had been with him But after forty days without a fish the boy’s parents had told him that the old man was now definitely and finally salao, which is the worst form of unlucky, and the boy had gone at their orders in another boat which caught three good fish the first week It made the boy sad to see the old man come in each day with his skiff empty and he always went down to help him carry either the coiled lines or the gaff and harpoon and the sail that was furled around the mast The sail was patched with flour sacks and, furled, it looked like the flag of permanent defeat The old man was thin and gaunt with deep wrinkles in the back of his neck The brown blotches of the benevolent skin cancer the sun brings from its [9] reflection on the tropic sea were on his cheeks The blotches ran well down the sides of his face and his hands had the deep-creased scars from handling heavy fish on the cords But none of these scars were fresh They were as old as erosions in a fishless desert Everything about him was old except his eyes and they were the same color as the sea and were cheerful and undefeated “Santiago,” the boy said to him as they climbed the bank from where the skiff w 12 Tạp chí KHOA HỌC - Trường Đại học Quốc tế Hồng Bàng Số 14 - 01/2021: 1-12 We’ve made some money.” The old man had taught the boy to fish and the boy loved him “No,” the old man said “You’re with a lucky boat Stay with them.” “But remember how you went eighty-seven days without fish and then we caught big ones every day for three weeks.” “I remember,” the old man said “I know you did not leave me because you doubted.” “It was papa made me leave I am a boy and I must obey him.” “I know,” the old man said “It is quite normal.” “He hasn’t much faith.” [10] “No,” the old man said “But we have Haven’t we?” ‘Yes,” the boy said “Can I offer you a beer on the Terrace and then we’ll take the stuff home.” “Why not?” the old man said “Between fishermen.” They sat on the Terrace and many of the fishermen made fun of the old man and he was not angry Others, of the older fishermen, looked at him and were sad But they did not show it and they spoke politely about the current and the depths they had drifted their lines at and the steady good weather and of what they had seen The successful fishermen of that day were already in and had butchered their marlin out and carried them laid full length across two planks, with two men Ernest Hemingway The Old Man and the Sea staggering at the end of each plank, to the fish house where they waited for the ice truck to carry them to the market in Ha taken them to the shark factory on the other side of the cove where they were hoisted on a block and tackle, their livers removed, their fins cut off and their hides skinned out and their flesh cut into strips for salting When the wind was in the east a smell came across the harbour from the shark factory; but today there [11] was only the faint edge of the odour because the wind had backed into the north and then dropped off and it was pleasant and sunny on the Terrace “Santiago,” the boy said “Yes,” the old man said He was holding his glass and thinking of many years ago “Can I go out to get sardines for you for tomorrow?” “No Go and play baseball I can still row and Rogelio will throw the net.” “I would like to go If I cannot fish with you I would like to serve in some way.” “You bought me a beer,” the old man said “You are already a man.” “How old was I when you first took me in a boat?” “Five and you nearly were killed when I brought the fish in too green and he nearly tore the boat to pieces Can you remember?” “I can remember the tail slapping and banging and the thwart breaking and the noise of the clubbing I can remember you throwing me into the bow where the wet coiled lines were and feeling the whole boat shiver and the noise of you clubbing him like chopping a tree down and the sweet blood smell all over me.” [12] “Can it to you?” “I remember everything from when we first went together.” The old man looked at him with his sun-burned, confident loving eyes “If you were my boy I’d take you out and gamble,” he said “But you are your father’s and your mother’s and you are in a lucky boat.” “May I get the sardines? I know where I can get four baits too.” “I have mine left from today I put them in salt in the box.” “Let me get four fresh ones.” “One,” the old man said His hope and his confidence had never gone But now they were freshening as when the breeze rises “Two,” the boy said “Two,” the old man agreed “You didn’t steal them?” “I would,” the boy said “But I bought these.” “Thank you,” the old man said He was too simple to wonder when he had attained humility But he [13] knew he had attained it and he knew it was not disgraceful and it carried no loss of true pride “Tomorrow is going to be a good day with this current,” he said “Where are you going?” the boy asked “Far out to come in when the wind shifts I want to be out before it is light.” “I’ll try to get him to work far out,” the boy said “Then if you hook something truly big we can come to your aid.” “He does not like to work too far out.” “No,” the boy said “But I will see something that he cannot see such as a bird working and get him to come out after dolphin.” “Are his eyes that bad?” “He is Study of Decentralized Customer-to-Customer Ecommerce Model said “He never went turtle-ing That is what kills the eyes.” “But you went turtle-ing for years off the Mosquito Coast and your eyes are good.” Ernest Hemingway The Old Man and the Sea “I am a strange old man” “But are you strong enough now for a truly big fish?” “I think so And there are many tricks.” [14] “Let us take the stuff home,” the boy said “So I can get the cast net and go after the sardines.” They picked up the gear from the boat The old man carried the mast on his shoulder and the boy carried the wooden boat with the coiled, hard-braided brown lines, the gaff and the harpoon with its shaft The box with the baits was under the stern of the skiff along with the club that was used to subdue the big fish when they were brought alongside No one would steal from the old man but it was better to take the sail and the heavy lines home as the dew was bad for them and, though he was quite sure no local people would steal from him, the old man thought that a gaff and a harpoon were needless temptations to leave in a boat They walked up the road together to the old man’s shack and went in through its open door The old man leaned the mast with its wrapped sail against the wall and the boy put the box and the other gear beside it The mast was nearly as long as the one room of the shack The shack was made of the toug called guano and in it there was a bed, a table, one chair, and a place on the dirt floor to cook with charcoal On the brown walls of the flattened, overlapping leaves of the sturdy fibered [15] guano there was a picture in color of the Sacred Heart of Jesus and another of the Virgin of Cobre These were relics of his wife Once there had been a tinted photograph of his wife on the wall but he had taken it down because it made him too lonely to see it and it was on the shelf in the corner under his clean shirt “What you have to eat?” the boy asked “A pot of yellow rice with fish Do you want some?” “No I will eat at home Do you want me to make the fire?” “No I will make it later on Or I may eat the rice cold.” “May I take the cast net?” “Of course.” There was no cast net and the boy remembered when they had sold it But they went through this fiction every day There was no pot of yellow rice and fish and the boy knew this too “Eighty-five is a lucky number,” the old man said “How would you like to see me bring one in that dressed out over a thousand pounds?” “I’ll get the cast net and go for sardines Will you sit in the sun in the doorway?” [16] “Yes I have yesterday’s paper and I will read the baseball.” The boy did not know whether yesterday’s paper was a fiction too But the old man brought it out from under the bed “Perico gave it t back when I have the sardines I’ll keep yours and mine together on ice and we can share them in the morning When I come back you can tell me about the baseball.” “The Yankees cannot lose.” “But I fear the Indians of Cleveland.” “Have faith in the Yankees my son Think of the great DiMaggio.” “I fear both the Tigers of Detroit and the Indians of Cleveland.” “Be careful or you will fear even the Reds of Cincinnati and the White Sax of Chicago.” “You study it and tell me when I come back.” “Do you think we should buy a terminal of the lottery with an eighty-five? Tomorrow is the eighty-fifth day.” “We can that,” the boy said “But what about the eighty-seven of your great record?” [17] “It could not happen twice Do you think you can find an eighty-five?” Ernest Hemingway The Old Man and the Sea “I can order one “One sheet That’s two dollars and a half Who can we borrow that from?” “That’s easy I can always borrow two dollars and a half.” “I think perhaps I can too But I try not to borrow First you borrow Then you beg.” “Keep warm old man,” the boy said “Remember we are in September.” “The month when the great fish come,” the old man said “Anyone can be a fisherman in May.” “I go now for the sardines,” the boy said When the boy came back the old man was asleep in the chair and the sun was down The boy took the over the back of the chair and over the old man’s shoulders They were strange shoulders, still powerful although very old, and the neck was still strong too and the creases did not show so much when the old man was asleep and his head fallen forward His shirt had been patched so many times that it was like the sail and the patches were faded to many different shades by the sun The [18] old man’s head was very old though and with his eyes closed there was no life in his face The newspaper lay across his knees and the weight of his arm held it there in the evening breeze He was barefooted The boy left him there and when he came back the old man was still asleep “Wake up old man,” the boy said and put his hand on one of the old man’s knees The old man opened his eyes and for a moment he was coming back from a long way away Then he smiled “What have you got?” he asked “Supper,” said the boy “We’re going to have supper.” “I’m not very hungry.” “Come on and eat You can’t fish and not eat.” “I have,” the old man said getting up and taking the newspaper and folding it Then he started to fold the blanket “Keep the blanket around you,” the boy said “You’ll not fish without eating while I’m alive.” “Then live a long time and take care of yourself,” the old man said “What are we eating?” “Black beans and rice, fried ba 2,* Tran Trung Dung and Tran Manh Ha brought them in a two-decker metal container from the Terrace The two sets of knives and forks and spoons were in his pocket with a paper napkin wrapped around each set “Who gave this to you?” “Martin The owner.” “I must thank him.” “I thanked him already,” the boy said “You don’t need to thank him.” “I’ll give him the belly meat of a big fish,” the old man said “Has he done this for us more than once?” “I think so.” “I must give him something more than the belly meat then He is very thoughtful for us.” “He sent two beers.” “I like the beer in cans best.” “I know But this is in bottles, Hatuey beer, and I take back the bottles.” “That’s very kind of you,” the old man said “Should we eat?” “I’ve been asking you to,” the boy told him gently “I have not wished to open the container until you were ready.” [20] “I’m ready now,” the old man said “I only needed time to wash.” Where did you wash? the boy thought The village water supply was two streets down the road I must have water here for him, the boy thought, and soap and a good towel Why am I so Ernest Hemingway The Old Man and the Sea thoughtless? I must get him another shirt and a jacket for the winter and some sort of shoes and another blanket “Your stew is excellent,” the old man said “Tell me about the baseball,” the boy asked him “In the American League it is the Yan “They lost today,” the boy told him “That means nothing The great DiMaggio is himself again.” “They have other men on the team.” “Naturally But he makes the difference In the other league, between Brooklyn and Philadelphia I must take Brooklyn But then I think of Dick Sisler and those great drives In the old park.” “There was nothing ever like them He hits the longest ball I have ever seen.” “Do you remember when he used to come to the Terrace?” [21] “I wanted to take him fishing but I was too timid to ask him Then I asked you to ask him and you were too timid.” “I know It was a great mistake He might have gone with us Then we would have that for all of our lives.” “I would like to take the great DiMaggio fishing,” the old man said “They say his father was a fisherman Maybe he was as poor as we are and would understand.” “The great Sisler’s father was never poor and he, the father, was playing in the Big Leagues when he was my age.” “When I was your age I was before the mast on a square rigged ship that ran to Africa and I have seen lions on the beaches in the evening.” “I know You told me.” “Should we talk about Africa or about baseball?” “Baseball I think,” the boy said “Tell me about the great John J McGraw.” He said Jota for J “He used to come to the Terrace sometimes too in the older days But he was rough and drinking His mind was on horses as well as baseball At least he carried lists of [22] horses at all times in his pocket and frequently spoke the names of horses on the telephone.” “He was a great manager,” the boy said “My father thinks he was the greatest.” “Because he came here the most times,” the old man said “If Durocher had continued to come here each year your father would think him the greatest manager.” “Who is the greatest manager, really, Luque or Mike Gonzalez?” “I think they are equal.” “And the best fisherman is you.” “No I know others better.” “Que Va,” the boy said “There are many good fishermen and some great ones But there is only you.” “Thank you You make me happy I hope no fish will come along so great that he will prove us wrong.” “There is no such fish if you are still strong as you say.” “I may not be as strong as I think,” the old man said “But I know many tricks and I have resolution.” “You ought to go to bed now so that you will be fresh in the morning I will take the things back to the Terrace.” [23] “Good night then I will wake you in the morning.” “You’re my alarm clock,” the boy said Ernest Hemingway The Old Man and the Sea “Age is my alarm clock,” the old man said “Why old men wake so early? Is it to have one longer day?” “I don’t know,” the boy said “All I know is that young boys sleep la ABSTRACT The customer-to-customer (C2C) ecommerce model allows customers to purchase goods or services, and transfer money through direct or indirect transac ons This model usually depends on mediate companies to deal with the main challenges of technology maintenance and quality control This paper presents a decentralized C2C ecommerce model based on mobile peer-to-peer (P2P) networks Several remarkable features of the mobile P2P networks include autonomy in control and administra on, scalability and reliability in par cipants and resources These features not only avoid centralized servers and technology maintenance but also facilitate quality control by selec ng various quality par cipants and resources using flexible search mechanisms on mobile devices We have provided the design of Book Trading Service (BTS) using Gnutella protocol and the prototype of the BTS applica on on Android mobile pla orm Experimental results depict the feasibility and effec veness of the decentralized C2C ecommerce model and the BTS applica on that can also be applied to several applica on domains man said “I’ll waken you in time.” “I not like for him to waken me It is as though I were inferior.” “I know.” “Sleep well old man.” The boy went out They had eaten with no light on the table and the old man took off his trousers and went to bed in the dark He rolled his trousers up to make a pillow, putting the newspaper inside them He rolled himself in the blanket and slept on the other old newspapers that covered the springs of the bed He was asleep in a short time and he dreamed of Africa when he was a boy and the long golden beaches and the white beaches, so white they hurt your eyes, and the high capes and the great brown mountains He lived along that coast now every night and in his dreams he heard the surf roar and saw the native boats [24] come riding through it He smelled the tar and oakum of the deck as he slept and he smelled the smell of Africa that the land breeze brought at morning Usually when he smelled the land breeze he woke up and dressed to go and wake the boy But tonight the smell of the land breeze came very early and he knew it was too early in his dream and went on dreaming to see the white peaks of the Islands rising from the sea and then he dreamed of the different harbours and roadsteads of the Canary Islands He no longer dreamed of storms, nor of women, nor of great occurrences, n strength, nor of his wife He only dreamed of places now and of the lions on the beach They played like young cats in the dusk and he loved them as he loved the boy He never dreamed about the boy He simply woke, looked out the open door at the moon and unrolled his trousers and put them on He urinated outside the shack and then went up the road to wake the boy He was shivering with the morning cold But he knew he would shiver himself warm and that soon he would be rowing The door of the house where the boy lived was unlocked and he opened it and walked in quietly with his [25] bare feet The boy was asleep on a cot in the first room and the old man could see him clearly with the light that came in from the dying moon He took hold of one foot gently and held it until the boy woke and turned and looked at him The old man nodded and the boy took his trousers from the chair by the bed and, sitting on the bed, pulled them on The old man went out the door and the boy came after him He was sleepy and the old man put his arm across his shoulders and said, “I am sorry.” “Qua Va,” the boy said “It is what a man must do.” They walked down the road to the old man’s shack and all along the road, in the dark, barefoot men were moving, carrying the masts of their boats When they reached the old man’s shack the boy harpoon and gaff and the old man carried the mast with the furled sail on his shoulder “Do you want coffee?” the boy asked “We’ll put the gear in the boat and then get some.” They had coffee from condensed milk cans at an early morning place that served fishermen “How did you sleep old man?” the boy asked He [26] was waking up now although it was still hard for him to leave his sleep “Very well, Manolin,” the old man said “I feel confident today.” “So I,” the boy said “Now I must get your sardines and mine and your fresh baits He brings our gear himself He never wants anyone to carry anything.” “We’re different,” the old man said “I let you carry things when you were five years old.” Keywords: C2C ecommerce model, P2P network, distributed compu ng, mobile compu ng Received: 11/12/2020 Revised: 23/12/2020 Accepted for publica on: 11/01/2021 ISSN: 2615 - 9686 Journal of Science - Hong Bang Interna onal University