0 GPS

GPS Is a U.S. space-based global navigation satellite system. It provides reliable positioning, navigation, and timing services to worldwide users on a continuous basis in all weather, day and night, anywhere on the Earth

History About GPS

The first satellite navigation system, Transit, used by the United States Navy, was first successfully tested in 1960. It used a constellation of five satellites and could provide a navigational fix approximately once per hour. In 1967, the U.S. Navy developed the Timation satellite which proved the ability to place accurate clocks in space, a technology that GPS relies upon. In the 1970s, the ground-based Omega Navigation System, based on phase comparison of signal transmission from pairs of stations , became the first worldwide radio navigation system. Friedwardt Winterberg proposed a test of General Relativity using accurate atomic clocks placed in orbit in artificial satellites. To achieve accuracy requirements, GPS uses principles of general relativity to correct the satellites' atomic clocks. After Korean Air Lines Flight 007 was shot down in 1983 after straying into the USSR's prohibited airspace President Ronald Reagan issued a directive making GPS freely available for civilian use, once it was sufficiently developed, as a common good. The first satellite was launched in 1989

How GPS Works
The Global Positioning System (GPS) is a technical marvel made possible by a group of satellites in earth orbit that transmit precise signals, allowing GPS receivers to calculate and display accurate location, speed, and time information to the user.
By capturing the signals from three or more satellites (among a constellation of 31 satellites available), GPS receivers are able to use the mathematical principle of trilateration to pinpoint your location.
With the addition of computing power, and data stored in memory such as road maps, points of interest, topographic information, and much more, GPS receivers are able to convert location, speed, and time information into a useful display format.

0 Netiquette

Netiquette

Netiquette, which is short for Internet etiquette, is the code of acceptable behaviors users should follow while on the internet; that is, it is the conduct expected of the individuals while online. Netiquette, includes rules for all aspects of the internet, including the World Wide Web, e-mail, instant messaging, chat rooms, FTP and newsgroup.

1. In e-mail, chat rooms and news groups:
Keep message brief. Use proper grammar, spelling and punctuation.
1.Be careful when using sarcasm and humor, as it might be misinterpreted.
2.Be polite. Avoid offensive language.
3.Read the message before you send it.
4.Use meaningful subject lines.
5.Avoid sending or posting flames, which are abusive or insulting messages.
Do not participate in flame war, which are exchanges of flames.
2. Avoid sending spam, which is the internet’s version of junk mail. Spam is an unsolicited e-mail message or newsgroup posting sent to many recipients or newsgroup at once.
3. Do not use all capital letters, which is the equivalent of SHOUTING!

4. Read the FAQ (frequently asked questions), if one exists. Many newsgroup and Web Pages have an FAQ.

5. Do not assume material is accurate or up-to-date. Be forgiving of other’s mistake.
6.Never read someone’s private e-mail of course.

0 Anne Mulcahy

Anne Mulcahy

Xerox CEO

Color printing and consulting services are the two areas where the Xerox Corporation can make a difference, according to Anne Mulcahy, the company’s CEO and chairman of the board. She should know the nature of the business, having started her career with the Stamford, Conneticut-based corporation more than 30 years ago as a field sales representative.
One of the Anne Mulcahy’s first decisions after landing the top landing in 2001 was eliminating the corporation’s tagline, “The Document Company.” She believes the company’s name, standing solo, speaks for itself in the printing, copying and services world. Her ethical and values based leadership decisions to revamp the company have revolved around Xerox’s roots of innovation and customer care. She is a member of the boards of directors of Target Corporation, Citigroup, and Catalyst, a not-for-profit organization supporting women in business.

0 Bill Gates

TECHNOLOGY TRAILBLAZERS

Bill Gates


Bill Gates, the founder of Microsoft Corporation, suggests that college student should learn how to learn by getting the best education they can. Because he is considered by many as the most powerful person in the computing industry, it might be wise to listen to him.
Gates learned to program computers when he was 13. Early in his career, he developed the BASIC programming language for the MITS Altair, one of the first microcomputers. He founded Microsoft in 1975 with Paul Allen, and five years later, they provided the first operating system, called MS-DOS, for the IBM PC. Today Microsoft’s Windows and Office products dominate the software market.
In July 2008, Gates relinquished his day-to-day role in the company. He continues as chairman and advisor while devoting more time to his philanthropic efforts.

0 Moore's Law

What’s is Moore’s Law?

Moore’s Law is a prediction made by one of the founders of Intel, Gordon Moore, that the number of transistor and resistors placed on computer chips would double every year, with a proportional increase in computing power and decrease in cost. This prediction is used until now.

0 History of Internet

HISTORY OF THE INTERNET

The internet has its roots in a networking project started by the Pentagon’s Advanced Research Project Agency (ARPA), an agency of the U.S Departement of Defense. ARPA’s goal was to build a network that (1) allowed scientists at different physical locations to share information and work together on military and scientific projects and (2) could function even if part of the network were disabled or destroyed by a disaster such as a nuclear attack. That network, called ARPANET, became functional in September 1969, lingking scientific and academic researchers across the United States.

The original ARPANET consisted of four main computers, one each located at the University of California at Los Angels, the University of California at Santa Barbara, the Stanford Research Institute, and the University of Utah. Each computer served as a host on the network. A host, more commonly known today as a server, is any computer that provides services and connections to other computer on a network. Hosts often use high-speed communications to transfer data and messages over a network.

As researchers and others realized the great benefit of using ARPANET’s e-mail to share data and information, ARPANET underwent phenomenal growth. By 1984, ARPANET had more than 500 million hosts connect to the Internet.

Some organization connected entire network to ARPANET to take advantage of the high speed communications it offered. In 1986, the National Science Foundation (NSF) connected its huge network of five supercomputer centers, called NSFnet, to ARPANET. This configuration of complex networks and hosts became known as the internet.