scientific american - 1998 10 - how hackers break in
scientific american - 1998 10 - how hackers break in
... Case against Regulating Encryption Technology Ronald L. Rivest 95 98 106 110 116 1100 100 010 10 1100 1 0101 1001 100 0100 1 OF MESS GE KEY CIPHER Molecular prescription (page 17) Copyright 1998 Scientific ... exactly how angiogen- esis inhibitors work, angiostatin is ex- pected to be tested in humans begin- ning late this year. (Several synthetic an- giogenesis inhibitors ar...
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scientific american - 1994 10 - special issue - life in the universe
... 0.50 DENSITY 0 .10. 01 RELATIVE ABUNDANCE 1.0 1.0 10 -2 10 -4 10 -6 10 -8 10 -1 0 HELIUM HELIUM 3 LITHIUM DEUTERIUM Copyright 1994 Scientific American, Inc. would still be detectable in the existing universe. D espite ... ex- plain why the excess produced in this way should be one part in 10 10 , or cal- culate its precise value, until we under- stand the d...
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scientific american - 1998 03 - inside a virtual human
... called uro- plakins, that get ex- pressed only in the bladder. These uro- plakins mesh to- gether and probably have a role in main- taining a tidy lining, a highly desirable feature in a bladder. Kenneth ... to de- The Bose-Einstein Condensate40 Scientific American March 1998 The Bose-Einstein Condensate Three years ago in a Colorado laboratory, scientists realized a long-stand...
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scientific american - 1998 05 - six months in space
... Analysis26 Scientific American May 1998 In Brief, continued from page 24 Dream On Recent findings show that one popular theory about sleep may be all wrong. Because people awakened during rap- id-eye-movement ... pro- gram, including Hu Side, head of the Chinese Academy of Engineering Phys- ics, and his deputy Du Xiangwan. Both are “very strong arms-control advo- cates,” Cochran insis...
Ngày tải lên: 12/05/2014, 15:36
scientific american - 2002 10 - vehicle of change - how fuel - cell cars could revolutionize the world
... the poor perfor- mance of Sweden stems largely from increas- es in inequality and insecurity, combined with a mediocre increase in consumption. The usefulness of the index is in raising questions ... whistle, Foot-Prints sprang toward the ball, step by agonizingly slow step. Tao-Pie-Pie wobbled out to narrow the angle. Foot-Prints - nally unleashed a nudge that shot the ball oh-so-sl...
Ngày tải lên: 12/05/2014, 16:14
How HackersCrackers Break Into Your System.
... muốn. Hacking có 9 bước đã được đề cập đến trong cuốn sách Hacking Exposed, bao gồm: (chỗ này để đại tiếng Anh cho dễ hiểu) FootPrinting Scanning Enumeration Gaining Access Escalating Privileges ... Escalating Privileges Pilfering Covering Tracks Creating "Back Doors" Denial of Service 1. FootPrinting: Đây là cách mà hacker làm khi muốn lấy một lượng thông tin tối đa về má...
Ngày tải lên: 02/11/2012, 14:18
scientific american - 1993 10 - is los angeles winning the war on smog
... to pre- vent the introduction of cross-links and succeeded in determining the complete structure of insulin. Four years later, Sanger won the No- bel Prize in Chemistry for the insu- lin work. ... linked together in some order in a chain, the sequence could be determined in the following way. After labeling the chains, they could be broken down into individ- ual amino acids, indicat...
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scientific american - 1994 07 - how cancers defeat drug therapy
... urban devel- opment. The rising ratio of farm-house- hold income to the household income of industrial workers in Japan shows the trend: 69 percent in 1960, 92 in 1970, 115 in 1980 and 113 in 1988. W hat ... cen- tury, giving annual yields of up to six tons per hectare in some double-crop- ping areas. Rice plants have several seed-bearing stems, and each seed head contains on aver...
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scientific american - 1995 01 - warning - digital documents in danger
... discarded. (In extreme cases, transla- tion can completely un- dermine content: imag- ine blindly translating both languages in a bi- lingual dictionary into a third language.) Con- versely, copying ... The sci- entists have uncovered a slightly small- er protein, dubbed NSA for netrin-syn- ergizing activity, that seems to in u- ence netrin potency. Perhaps NSA, like certain proteins in...
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scientific american - 1995 02 - bubbles turn sound into light
... creatures live in eastern Austra- lia is increasingly be- ing sought by real-es- tate developers. Koalas have come to live cheek-by-snout with people moving into coastal areas pop- ulated with the ani- malsÕ ... species. Anal- ysis showed that invading is a dicey lifestyle choice. ÒWe determined that, collectively, alien beings in science-Þc- tion Þlms do suÝer from high mortali- 20 SCIE...
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