multiple access methods in networking
MOB Subject 5 –Access methods Static and dynamic access techniques
Ngày tải lên :
17/09/2012, 09:13
... the pure ALOHA protocol consists in defining intervals of repetitive
times (slots) and not in authorizing the transmitting stations that in beginning of each interval.
This protocol is known under ... 5
consists in introducing a mechanism allowing, in the event of collision, stopping immediately
the continuation of transmission of a frame. In others words, the transmitting stations seeing
that ... already in use, the station does not remain in
listening permanent the station, it waits a random time then repeats the procedure since the
beginning.
p-persistent CSMA: The time is divided into intervals,...
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Báo cáo y học: "A Comparison of Immuncapture Agglutination and ELISA Methods in Serological Diagnosis of Brucellosis"
Ngày tải lên :
25/10/2012, 10:56
... advantage of identifying different clas-
ses of antibodies in comparison to other agglutination
methods. Different results may be obtained depend-
ing on the nature of anti-globulin. This situation ... and blocking antibodies that form against
brucella, the titers that it has determined were higher
in number than STA and Coombs methods has higher
sensitivity and specificity (4).
In a study ... hand, appear in three weeks and
reach a peak in six to eight weeks. Coombs test is
needed to investigate blocking antibodies. Dilutions
need to be performed in very high ratios in order to...
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Báo cáo y học: " Non-syndromic multiple supernumerary teeth in a family unit with a normal karyotype: case report"
Ngày tải lên :
25/10/2012, 11:40
... Corresponding author: Prof. Francesco INCHINGOLO, Piazza Giulio Cesare – Policlinico 70124 – Bari. E-mail:
f.inchingolo@tin.it; f.inchingolo@doc.uniba.it. Tel.: 00390805593343 – Infoline: 00393312111104. ...
© Ivyspring International Publisher. All rights reserved
Case Report
Non-syndromic multiple supernumerary teeth in a family unit with a
normal karyotype: case report
Francesco Inchingolo
1
, ... found in the supe-
rior maxillary bone and mainly in the premaxilla
(90-98%)
7
, they are often impacted (88,7%) and are
often present in the palatine area
8,9
.
The prevalence of multiple...
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Multiple Access Protocols for Mobile Communications - GPRS, UMTS and Beyond
Ngày tải lên :
02/03/2013, 16:59
... extremely
large in the case of unconstrained channel access, resulting in a low inherent statistical
multiplexing gain. By combining CDMA with PRMA, it is possible to control the access
of users ... (P
loss
)
max
in multiples of σ
K
d Hamming distance
d
il
Interleaving depth
d
min
Minimum Hamming distance
e Error correcting capability of an (L, B, e) block code; also 2.718 282
f
CAF
Channel access ... 46
2.6 Summary 48
3 Multiple Access in Cellular Communication Systems 49
3.1 Multiple Access and the OSI Layers 49
3.2 Basic Multiple Access Schemes 53
3.3 Medium Access Control in 2G Cellular Systems...
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Access 2003 in Pictures
Ngày tải lên :
18/10/2013, 14:15
... database stores information in an organized way, and makes it easy
to get information in and out.
Tables
store data within the database.
Forms
make it easy to put data into tables.
...
5.
Double-click the Practice Access Files folder.
It should appear in the Save in box.
DATABASE BASICS
29
3.
When the Form Wizard window appears, click the button. ... should appear:
DATABASE BASICS
3
2.
In the Getting Started pane, click Create a new file.
DATABASE BASICS
8
7.
Click the button.
The window for the Friends database should open:...
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Tài liệu Lab 11.2.3d Multiple Access Lists Functions (Challenge Lab) pdf
Ngày tải lên :
18/01/2014, 05:20
...
Outgoing access list is ________
Inbound access list is ________
Interface __________
Outgoing access list is ________
Inbound access list is ________
Interface __________
Outgoing access ... Telnet to the Internet (host 3).
d. Now that the infrastructure is in place, it is time to begin securing the internetwork.
Step 5 Secure the Intranet Server
a. Host #4 represents an internal web ... telnet to the routers
Step 7 Deter Internet Abuse
a. There have also been some complaints that employees have been abusing Internet access.
They have been accessing sites with questionable content....
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Tài liệu Finite Difference Methods in Financial Engineering ppt
Ngày tải lên :
23/01/2014, 06:20
... Char Count= 0
10 Finite Difference Methods in Financial Engineering
1.4 INITIAL VALUE PROBLEMS
In the previous section we examined a differential equation on a bounded interval. In this case
we ... Char Count= 0
8 Finite Difference Methods in Financial Engineering
1.2 TWO-POINT BOUNDARY VALUE PROBLEM
Let us examine a general second-order ordinary differential equation given in the form
u
= ... Char Count= 0
16 Finite Difference Methods in Financial Engineering
Γ
η
Ω
Figure 2.3 Two-dimensional bounded region
r
Harmonic functions (Du Plessis, 1970; Rudin, 1970)
r
Mapping functions between...
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Tài liệu Chapter 12 Multiple Access docx
Ngày tải lên :
16/02/2014, 20:20
... functions in polling access method
12.40
Figure 12.22 Time-division multiple access (TDMA)
12.35
Figure 12.20 Logical ring and physical topology in token-passing access method
12.1
Chapter 12
Multiple ... the maximum propagation time (including the delays in
the devices and ignoring the time needed to send a
jamming signal, as we see later) is 25.6 μs, what is the
minimum size of the frame?
Example ... protocol
12.24
Figure 12.13 Collision and abortion in CSMA/CD
12.38
Figure 12.21 Frequency-division multiple access (FDMA)
12.29
In CSMA/CA, the IFS can also be used to
define the priority of a station or a...
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Tài liệu Statistical Methods in Analytical Chemistry docx
Ngày tải lên :
17/02/2014, 10:20
...
mechanics of running and maintaining instruments. Designing experiments
and interpreting the results in
a
wider context were primary motives, and the
advent
of
computerized instrumentation ... reinject the same sample solution in order
to obtain a quasi-independent measurement. Two independent weigh-
ings and duplicate injection for each solution is a commonly applied
rule.
In ... commonly defined as the standard deviation
obtained using a given standard operating procedure
(SOP)
in connection
with a particular sample, and repeatedly measuring a parameter in the same...
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Tài liệu Marketing Research Methods in SAS - Experimental Design, Choice, Conjoint, and Graphical Techniques docx
Ngày tải lên :
18/02/2014, 07:20
... purchasing decision.
The insight gained from perceptual mapping and conjoint analysis can be a valuable asset in marketing
decision making. These techniques can help you gain insight into your ... asked to rank in order of preference 18 out of the possible 54 combinations.
Although rankings are used in this example, preference ratings are frequently used in conjoint analysis.
Invoking the Application. ... to aid in determining what kinds of consumers are buying your
products. Multidimensional preference analysis and multidimensional scaling show product positioning,
group preferences, and individual...
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Tài liệu Báo cáo khoa học: Models and mechanisms of O-O bond activation by cytochrome P450 A critical assessment of the potential role of multiple active intermediates in oxidative catalysis doc
Ngày tải lên :
19/02/2014, 16:20
... thiolate-ligated
constitutive or inducible hemoprotein isoforms [281],
exhibiting insign ificant sequence identity with P450s in
the heme-binding region [282], but bearing a C-terminal
flavoprotein fragment in the single ... B. (1994) The pteridine b inding site of brain nitric oxide
synthase. Tetrahydrobiopterin binding k inetics, specificity, and
allosteric interaction w ith the substrate d omain. J. Biol. Chem.
269, ... N-hydroxylation o f one of the two
equivalent guanidino nitrogens of arginine [281]. While
L
-arginine and the homo-
L
-arginine derivative have been
originally thought to be the only true N OS substrates,
more...
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Tài liệu Báo cáo khoa học: "Mixing Multiple Translation Models in Statistical Machine Translation" docx
Ngày tải lên :
19/02/2014, 19:20
... 2010.
Discriminative instance weighting for domain adapta-
tion in statistical machine translation. In Proceedings
of the 2010 Conference on Empirical Methods in Nat-
ural Language Processing, EMNLP ... Resnik. 2008.
Online large-margin training of syntactic and struc-
tural translation features. In In Proceedings of the
Conference on Empirical Methods in Natural Lan-
guage Processing. ACL.
David ... concate-
nation baseline. In particular, Switching:Max could
gain up to 2.2 BLEU points over the concatenation
baseline and 0.39 BLEU points over the best per-
forming baseline (i.e. linear mixture...
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Tài liệu Báo cáo khoa học: "Multiple Default Inheritance in a Unification-Based" pdf
Ngày tải lên :
20/02/2014, 21:20
... example. Multiple
inheritance permits the two types of information
to be separated by isolating them in distinct sub-
hierarchies.
The question to be resolved in systems em-
ploying multiple inheritance ...
from one end, changing the remainder, and then
replacing the first string. In this section we show
briefly how unification, string concatenation, and
defensible inheritance combine to permit the ... st~ng-predicste macros, in particular OK,
must be defined in order to ester for the ~ range of spelling
changes observed in verbal inflee~on.
# Class verb_spelling (verb)
I
!Final_T(<base>,P)...
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Computational Methods in Plasma Physics ppt
Ngày tải lên :
05/03/2014, 11:21
... corresponding to dx/dt = ± c. Information emanating from a point
will in general travel along the two characteristics. These will divide space-
time into two regions relative to that point, a timelike ... obtain
−z sin φ + x cos φ = ±
d
dφ
u
j
(φ)t. (1.94)
Now, invert Eqs. (1.93) and (1.94) for (x, z) to obtain
x = R
0
sin φ +
sin φu
j
+ cos φ
d
dφ
u
j
(φ)
t,
z = R
0
cos φ +
cos φu
j
− sin ... Upwind Differencing . . . . . . . . . . . . . . . . . 242
9.3.1 Beam–Warming Upwind Method . . . . . . . . . . . . 244
9.3.2 Upwind Methods for Systems of Equations . . . . . . 245
9.4 Limiter Methods...
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