.... Generally, the main difficulties with sight are from either a misshapen cornea, which fails to focus light properly unto the receiving plate, the retina. Early treatments included the wearing of lenses, which corrected sight abnormalities, or even physical surgery with the scalpel which could release the tension on the cornea and allow it to form into it's proper shape. Now, with the help of modern science and computers, it's possible to use lasers in surgical procedures to reshape the lens. The procedure consists of creating a "flap" on the outermost layer of the cornea, and folding it back, allowing the laser to change the refra .....

.... to convince someone to reveal sensitive personal or business information. "It's like the Wild West", says Donn B. Parker of SRI: "No laws, rapid growth and enterprise - it's shoot first or be killed." To understand how the Internet, on which so many base their hopes for education, profit and international competitiveness, came to this pass, it can be instructive to look at the security record of other parts of the international communications infrastructure. The first, biggest error that designers seem to repeat is adoption of the "security through obscurity" strategy. Time and again, attempts to keep a system safe by keeping its vulnerabili .....

.... harder to detect and eliminate. These so-called "polymorphic" viruses are able to clone themselves and change themselves as they need to avoid detection. This form of "smart viruses" allows the virus to have a form of artificial intelligence. To understand the way a computer virus works and spreads, first one must understand some basics about computers, specifically pertaining to the way it stores data. Because of the severity of the damage that these viruses may cause, it is important to understand how anti-virus programs go about detecting them and how the virus itself adapts to meet the ever changing conditions of a computer. In much the s .....

.... and the Precise Positioning Service. " The Standard Positioning Service or SPS is a positioning and time service which is available to all GPS users on a continuous, worldwide basis with no direct charge." (Tycho) The SPS is provided on the L1 frequency, which then will code a navigational message. The SPS accuracy is 100-meter horizontal, 156-meter vertical, and 340 nanoseconds time, and in total the SPS is ninety-five percent accurate. (Utexas) The Department of Defense also degrades this service so those consumers can use this service. Secondly, the Precise Positioning Service or PPS " is a highly accurate military positioning, velocity a .....

.... tank was created by the French. It was lighter and faster. In 1914 Winston Churchill decided that the British aircraft should be protected from the ground by using armored motor vehicles. The Germans counteracted this by digging trenches across the roads of Germany. Some of the first armored vehicles were just normal cars converted in a tank. In 1915, Wolseley developed a thirty-cwt. lorry chassis with armored sides and a revolving turret with a Vickers-maxim machine gun. The first design of a tank known as “Little Willie� designed by Lieutenant W.G. Wilson and William Tritton. It consisted of an armored box encircled by caterpillar track .....

.... affected. Increased demand. Between 1980 and 1990, with deregulation and consumer demand for fast inner-city travel leading to lower airline fares, commercial air traffic has increased by 56 percent. Adding to the congestion and delay is increased commuter and regional air traffic. Those short distance flights take valuable landing slots that could be used for larger planes on more profitable, longer flights. With the maglev vehicles the shorter trips excluding access time can be cut a lot. With a study of 16 major corridors of travel, less than 300 miles in length, they studied how well the maglev vehicles could help, and in 10 out of the .....

.... fill you in who Seventek is, he is a computer guru that created a number of programs for the Berkeley UNIX system. At the time, he was in England far from computers and civilization. The crew does not what to believe that it would be Seventek, so they start to look what the impostor is doing. Cliff hooks up a few computers to the line that comes from the Tymnet. Tymnet is a series of fiber-optic cables that run from a major city to another major city. So if you were in LA and wanted to hook up to a computer in the Big Apple you could call long distance, have a lot of interference from other callers and have a slow connection, or you coul .....

.... happens. She shakes her little girl and realizes that something is drastically wrong. Mica is dead. At last count, this scenario has happened 31 times. How many more times does it have to happen before the automotive industry does something about it? Children are not the only victims, though. Small women and the elderly have also been killed as a result of airbags. The time has come to ask ourselves, "Do airbags really work?" First off, most people feel that airbags are a great safety device. They let people walk away from an accident without a scratch, right? They protect everybody, right? People don't need seatbelts if their car has an .....

.... phreaks," and "software pirates." These roles have frequently been ignored or confused in media and other accounts of CU activity. By utilizing a data set culled from CU channels of communication this paper provides an ethnographic account of computer underground organization. It is concluded that despite the widespread social network of the computer underground, it is organized primarily on the level of colleagues, with only small groups approaching peer relationships. Certification: In accordance with departmental and Graduate School policies, this thesis is accepted in partial fulfillment of degree .....

.... used Ethernet Version 2 as the basis for the 802.3 CSMA/CD network standard. The IEEE 802.3 standard is generally interchangeable with Ethernet II, with the greatest difference being the construction of the network packet header. This method consists of multiple workstation that accesses a transmission medium called Multiple Access. Here the medium listen until no signals are detected. This is known as Carrier Sense. After checking to see if more than one signal is present they transmit. This is called Collision Detection. When a collision occurs the station then has to retransmit. The most important part of CSMA/CD access method is collision detect .....