... A cell phone is a duplex device, so it uses one 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 sys ...

... shells. They could not stop armor piercing bullets however. In the 1960's new types of vests were developed whose plates were made of composite layers of steel or a very hard ceramic, boron carbide. However, the discovery that numerous layers of nylon fabric could dissipate the energy of the bullet revolutionized the use of modern body armor. The function of steel or hard plastic armor is to be impervious to a bullet. The function of ceramic armor is to slow the bullet abruptly by the hardness of the ceramic and to dissipate the bullet's energy as it destroys the armor at the point of impact; the tiles or plates of ceramic bulletproof vest thu ...

... have but it is still a good idea for us to be able to find the information in the card catolog because computers do go down. It is a nice combination. I’m glad we have a choice. Computers in the library are good for families who do not have computers at home. They can go online to do research, get help with homework, even send e-mail to family and friends you don’t get to see very often. It also helps people who are not comfortable with computers become aware of how easy and helpful they really are. You can do virtually anything on the computer. I can’t remember when we didn’t have a computer at home. A computer is a part of our everyday lives, but it s als ...

... the wish that progress in that area of technology is not made. The motives behind the wish to halt the progress of a technology are diverse and incorporate all manner of causes that include politics, human and environmental welfare, economics and the social consequences of implementing new technologies. The technological advancement in the science of weaponry and warfare is an area that has always brought forward groups in society that do not wish to see this area progress. The progress in the area of weaponry and warfare is seen by many as an increase in the capabilities for humans to destroy one another and the environment. The dropping of the ...

... every university in the country wanted to sign up. Because so many people wanted to use the Net, ARPANET started getting hard to manage, especially with many university sites on it. Therefore, it was broken into two parts: MILNET, which had all the military sites, and ARPANET, which had all the nonmilitary sites. "The two networks remained connected, however, thanks to a technical scheme called IP (Internet Protocol), which enabled traffic to be routed from one net to another as needed. All the networks connected by IP in the Internet speak IP, so they can all exchange messages." (Levine 12) Even though there were only two networks at that time, IP was made ...

... to occur, does not change at all during the reaction. This is the idea behind a catalytic converter. The carbon monoxide gas and hydrocarbons emitted from the engine will travel along the exhaust system until they reach they catalytic converter. There it comes into contact with the described catalyst. This forces a reaction between the carbon monoxide and hydrocarbons with the oxygen inside the converter creating products of carbon dioxide and water vapor. The reaction which occurs inside the converter is as follows: The main compounds involved are carbon monoxide and hydrocarbons (compounds of hydrogen and carbon), as well as oxygen. When these thre ...

... of my own primarily based on my readings about nineteenth and twentieth century . During the nineteenth century two major events stand out in connection to technology. First the progress and power of industrial technology, second the domination and exploitation of Africa and Asia by Europeans. In the book The Tools of Empire, Headrick the author connects theses factors through many examples in history. Leading into the twentieth century even though many would like to fast forward into the dawn of electronics, there is still a major focus on technology in Africa and Asia. However, the transfer of technology is now steering away from dominating and leaning towards lo ...

... the user greater control over sound quality even before the music passes through a sound card or speakers. If you are not comfortable with changing the equalizer settings yourself, Winamp has hundreds of preset settings which are categorized by music type. Examples of this include Jazz, Rock, Reggae, and many more. Winamp users even have the ability to create and save song-specific pre-amplifier and equalizer settings. Another important factor in choosing a music program for your computer is customizable features. Winamp meets this criterion well. The ability to customize your music player makes the program easier to use. The user has the ability to make a “Pla ...

... say, DOS on one disk, then both must interpret the partition table in the same way.This has some consequences for the Linux kernel and for fdisk. Below a rather detailed description of all relevant details.Note that I used kernel version 2.0.8 source as a reference.Other versions may differ a bit. 2.Booting When the system is booted, the BIOS reads sector 0 (known as the MBR - the Master Boot Record) from the first disk (or from floppy), and jumps to the code found there - usually some bootstrap loader.These small bootstrap programs found there typically have no own disk drivers and use BIOS services.This means that a Linux kernel can only be booted when it is en ...

... transmit and play back sound. When a picture or a sound is stored on a computer it said to be digitized. There are two main ways of digitizing a picture. One is by vector graphics. Here the information in the picture is stored as mathematical equations. Engineering drawing applications such as CAD (computer assisted device) use this method. The other method is by bit mapped graphics. Here the computer actually keeps track of every point in the picture and its description. Paint programs use this technique. Drawing programs are usually vector mapped programs and paint programs are usually bit mapped. Computer sound is handled in two different ways. The sound ...