.... frequency for talking, and a second separate frequency for listening (Dang). A CB radio has 40 channels. A cell phone can communicate on 1,664 channels. Cell phones also operate within cells and they can switch cells as they move around. Cells give cell phones incredible range. A walkie-talkie can transmit perhaps a mile. A CB radio, because it has much higher power, can transmit perhaps 5 miles. Someone using a cell phone, on the other hand, can drive clear across a city and maintain a conversation the entire time. Cells are what give a cell phone its incredible range (Anonymous #2). The genius of the cellular system is the realization that a city .....

.... Second of all,without knowledge of computers anyone dont stand a chance on the job market. Because without education in this field there is no way to succed in life or to find ajob which would provide decant pay for an average person. However,other people have different opinion about this issue. In theit opinion knowledge of computers is not required in today's job market. They also thinks that people should not depend so much on computers but more on their own education and capibilities to make the right decisions. Even knowing for a fact that the computers are almost everywhere in use it's not appropriate for people to get addicted to them .....

.... systems. However, the first person that was known to have demonstrated image transmission through a bundle of optical fibers was a guy by the name of Heinrich Lamm whom which was a medical student at Munich. His goal was to be able to look inside inaccessible parts of the human body, and in a 1930 paper he reported transmitting the image of a light bulb filament through a short bundle. However the unclad fibers transmitted the images poorly, and the rise of the Nazis forced Lamm, a Jew, to move to the USA and give up his dream of becoming a professor of medicine. A lot of things have changed since then. Fiber optics has come along way, and it is b .....

.... or decentralise government) and on issues of law enforcement. Hackers have raised serious issues about values and practices in an information society. Introduction It is true that computers and telecommunication networks have become a growing aspect of our society and of course of our lives. This type of technology is used to support unlawful as well as legal activities. Personal computers and especially the Internet consist of a collection of tools, which attract people from all social classes. People like housewives, workers and chief executives. Nowadays criminals are a group of people that are also attracted by today’s technology. The .....

.... and local factor often determine the choice between the use of steam and diesel engine. Diesel power plants have a distinct economic advantage over steam engine when size of the plant is under about 1,000 hp. However there are many diesel engine plants much large than this. Internal combustion engines are particularly appropriate for seasonal industries, because of the small standby losses with these engines during the shutdown period. History The first experimental internal combustion engine was made by a Dutch astronomer, Christian Huygens, who, in 1680, applied a principle advanced by Jean de Hautefeuille in 1678 for drawing water. This .....

.... net connection from? He gets the connection from the local phone company. · How logging on the internet is almost like logging right onto the local telephone company. -It all boils down to, the local phone company approving the use of the internet for any means. · How phone companies are going to bring them selves down. -I feel that because of this phone companies will be the cause to their own downfall. · Methods of communication over the net -There are many ways of communicating over the net: Inter relay chat (text only) -Video/Audio: there are many net applications which allow the user to simply plug in a mini video camera( which .....

.... to raise average wages over time, but in reality a lowering of wages for people with obsolete skills is taking place. The image that keeps popping up is the one of the elimination of the need for human work. This bleak picture is probably never going to occur on such a drastic scale, but it has happened to millions of hard working people. One concern is what the people as a whole going to do about losing their jobs. The only real answer to this problem may not be determined for years to come. As automation continues to grow, many people will be negatively affected. My feeling on the entire picture is spit both ways. On the one side, many appli .....

.... on and off. Computers in automobiles regulate the flow of fuel, thereby increasing gas mileage. Computers also entertain, creating digitized sound on stereo systems or computer-animated features from a digitally encoded laser disc. Computer programs, or applications, exist to aid every level of education, from programs that teach simple addition or sentence construction to advanced calculus. Educators use computers to track grades and prepare notes; with computer-controlled projection units, they can add graphics, sound, and animation to their lectures. Computers are used extensively in scientific research to solve mathematical problems. How .....

.... the way of a desired location or object. Computer security uses much of the same utilities. Passwords take the place of keys, security analysts take the place of guards, and firewalls take the place of physical barriers. Passwords and firewalls are the two most common ways to secure a computer system. Passwords are the most common forms of computer and network security. They are the most common because of three main reasons. First of all, passwords are cheap to implement. Virtually all computers have a password system built into it already. Every home computer can have a password to lock out certain programs from users other than yourself. Ev .....

.... the planes we know of, there are also top secret programs probably going on right now. A new fighter that has never been heard of before has been spotted. As John Welch, the assistant secretary of Air Force said, "Stealth gives us back that fundamental element of war called surprise" (Goodall 9). After it was found that aircraft could be very useful in war, it was used for large scale reconnaissance. Then people started to add bombs to aircraft and then airplanes started to become an essence of war. After World War 2, new bombers were developed with fast speed, and could travel far distances. They could also carry nuclear bombs and miss .....