Tuesday, July 31, 2007
ALUMINIUM RADIATORS
Be Cool is unsurpassed in cooling monster motors, especially when faced with common problems like tight spaces and small grille openings. Be Cool's technology produces radiators that are 40% lighter than conventional OEM units, yet have greater cooling power. Their epoxy-free construction provides better heat dissipation too, while allowing complete repairability.
A mirror polished finish is an option on all Be Cool radiators. High quality Be Cool radiators are 100% made in the U.S.A. Most are made for specific applications, fit without the need for major modifications and are compatible with all coolants.
Click Here to view the full range
Monday, July 30, 2007
Solar Furnaces
Use a huge array of mirrors to concentrate the Sun's energy into a small space and produce very high temperatures.
There's one at Odeillo, in France, used for scientific experiments.
It can achieve temperatures up to 3,300 degrees Celsius. Or 3,800 degrees Celsius. It all depends on which web site you read.
Solar Power is energy from the Sun
Introduction
We've used the Sun for drying clothes and food for thousands of years, but only recently have we been able to use it for generating power.
The Sun is 150 million kilometres away, and amazingly powerful.
Just the tiny fraction of the Sun's energy that hits the Earth (around a hundredth of a millionth of a percent) is enough to meet all our power needs many times over.
In fact, every minute, enough energy arrives at the Earth to meet our demands for a whole year - if only we could harness it properly.
Saturday, July 21, 2007
computer viruses
A computer virus is a computer program that can copy itself and infect a computer without permission or knowledge of the user. The original may modify the copies or the copies may modify themselves, as occurs in a metamorphic virus. A virus can only spread from one computer to another when its host is taken to the uninfected computer, for instance by a user sending it over a network or carrying it on a removable medium such as a floppy disk, CD, USB drive or by the Internet. Additionally, viruses can spread to other computers by infecting files on a network file system or a file system that is accessed by another computer. Viruses are sometimes confused with computer worms and Trojan horses. A worm, however, can spread itself to other computers without needing to be transferred as part of a host. A Trojan horse is a file that appears harmless until executed. In contrast to viruses, Trojan horses do not insert their code into other computer files. Many personal computers are now connected to the Internet and to local-area networks, facilitating their spread. Today's viruses may also take advantage of network services such as the World Wide Web, e-mail, and file sharing systems to spread, blurring the line between viruses and worms. Furthermore, some sources use an alternative terminology in which a virus is any form of self-replicating malware.
The term comes from the term virus in biology. A computer virus reproduces by making (possibly modified) copies of itself in the computer's memory, storage, or over a network. This is similar to the way a biological virus works.
Some viruses are programmed to damage the computer by damaging programs, deleting files, or reformatting the hard disk. Others are not designed to do any damage, but simply replicate themselves and perhaps make their presence known by presenting text, video, or audio messages. Even these benign viruses can create problems for the computer user. They typically take up computer memory used by legitimate programs. As a result, they often cause erratic behavior and can result in system crashes. In addition, many viruses are bug-ridden, and these bugs may lead to system crashes and data loss.
There are many viruses operating in the general Internet today, and new ones are created and discovered every day.