.... for archers to shoot arrows at invaders. The outer walls also had holes in the floors for defenders to drop rocks down on invading people who had gotten through the first wall. These holes were called murder holes. Inside the castle were many knights, archers, and soldiers prepared to defend against anyone who breaks all of the way through the walls and gets inside of the castle. Castles also had very large gates and gatehouses to let people into the castle. There was a gatehouse for each wall. Each gatehouse usually had a very large metal and wooden gate that could be lowered into the opening to stop an enemy from getting i .....

.... their power plants, and use it to research others ways of receiving power. For example, if the U.S. developed solar power more and made it less costly, as well are more convenient for the average person, then there would be no more problems. In the past century many advances have been made in terms of energy. Power plants became the main source of energy, and towards the end of the century, new advances have been made such as solar power. I predict that in the upcoming century, many new advances will be made which will benefit the human race enormously. If these advances are made, than the U.S. will not have to spend billions of .....

.... programs he wants to run. For many buyers, this creates a problem. They cannot buy a computer until they know what they want to do with it, but they cannot really know all of the uses there are for a computer until they own one. This problem is not as tough as it seems, however. The consumer should go to his local computer store, and look at the software that's available. Most programs explain their minimum hardware requirements right on the box. After looking at a few packages, it should be pretty clear to the consumer that any mid-range system will run 99% of the available software. A person should only need a top-of-the-l .....

.... of it and the base of the gun barrel behind it. The increase in pressure caused by the gases causes the bullet to be forced into the barrel hence causing the bullet to come out the muzzle at very high speeds. Once the bullet is fired, it remains in motion from its momentum. The momentum will carry the bullet until it strikes an object or gravity pulls the bullet towards the earth. Firearms change potential chemical energy into kinetic energy in the actual firing of the gun. Many people do not realise that the force imparted by accelerating the bullet is not the only force acting on the gun, or the shooter. Grains of burne .....

.... and could only be decoded using special staff keys. The key actually consisted of a physical object, which was applied on the message to get the decrypted version of it. In 50 Bc., one of the most simple cryptographic algorithms ever used was the one called the Caesar cipher, that was used by Julius Caesar to send messages to his generals. It consisted simply of switching each letter with the letter that was 3 letters further down the alphabet. For example "Stephen" would become "Vwhskhq". To decrypt the message, the receivers would simply subtract 3 letters from each letter. This algorithm was later improved and called RO .....

.... extended discussion of politics there is in the data warehousing literature. As of the writing of this paper, to the best of my knowledge, that situation still has not changed. This in unfortunate because ambitious data warehousing projects are rife with political issues. My working definition of a data warehousing "political issue" is a situation where the equally valid and reasonable goals and interests of two or more parties collide with each other. That is, these are situations where there is great potential for conflict. Though these issues can appear minor and even petty, they can account for a good portion of the mental w .....

.... with a piece of machinery known as the computer. This is done with several computer-user interfaces used to simulate the senses. Among these, are stereoscopic glasses to make the simulated world look real, a 3D auditory display to give depth to sound, sensor lined gloves to simulate tactile feedback, and head-trackers to follow the orientation of the head. Since the technology is fairly young, these interfaces have not been perfected, making for a somewhat cartoonish simulated reality. Stereoscopic vision is probably the most important feature of VR because in real life, people rely mainly on vision to get places and do t .....

.... in one clock cycle. This power is measured in Millions of Floating Point Operations Per Second (MFLOPS) - which is to say the rate at which floating-point operations can be performed. The Cray MFLOPS vary as it does many activities, but a rate of up to 210 MFLOPS (per CPU) can be achieved. The second '2' in the X-MP/22 title refers to the two million 64-bit words (16Mb) of shared central memory. This can be expanded to four million words in the future if the need arises. But it doesn't stop there! The Cray can pipe information back and forth between the CPU memory and the Input/Output Subsystem (IOS). The IOS then takes it .....

.... pregnancy, childcare, or any other parenting problem that may arise (Licklider C1). Another thing that is very helpful is that if something were to go wrong with a computer, chat rooms area available that have many people in them to help fix the computer, as long as it is something within reason (Gay 1). Internet in the classroom is an excellent thing. is very colorful so it keeps students attention. It is very simple to use, so no special training is needed. Teachers can even hook their computers up to the television so the whole class can follow along by watching the television (WWW). If students were able to .....

.... Some place a greater emphasis on blocking traffic, while others emphasize permitting traffic. Probably the most important thing to recognize about a firewall is that it implements an access control policy. The Internet, like any other society, is plagued with the kind of jerks who enjoy the electronic equivalent of writing on other people's walls with spray paint, tearing their mailboxes off, or just sitting in the street blowing their car horns. Some people try to get real work done over the Internet, and others have sensitive or proprietary data they must protect. Usually, a firewall's purpose is to keep the jerks out of o .....