It was a sunday. And its raining outside. so we decided to stay in our room.Being bored we started watching the latest superhit movie in our old computer, damn its got struck. "Press Alt-Ctrl-Delete " Adarsh told. Thank god.. we can kill the not responding player program from the task window poped up, with out restarting....
Did you ever used Alt-Ctrl-Delete key combination?.
Did you know tha man behind it... He is David J. Bradley
David J. Bradley
Man behind "Control-Alt-Delete" (a.k.a. three-finger salute)
Bradley is most famous for inventing the "Control-Alt-Delete" (a.k.a. three-finger salute) key combination that was used to reboot the computer.Bradley received a doctorate in electrical engineering from Purdue University in 1975. He was one of the original 12 engineers assigned to IBM’s PC project in Boca Raton, Fla., in 1980. Bradley also invented the CTRL-ALT-DELETE
sequence as a command in the BIOS. (CTRL-ALT-DELETE was originally used to reboot a computer and now calls up the Task Manager in Windows.) Bradley inserted the CTRL-ALT-DELETE sequence as a hidden command to let programmers reset their machines at the end of an unsuccessful programming routine. Word leaked out, and the public popularized the shortcut.
The original idea was simply to reset early PCs without turning them off. Microsoft adopted control-alt-delete to help ensure people powered down correctly, then to handle "administrative functions" such as the vital "end task" feature for computer software that crashes or otherwise gets stuck.
Bradley chose the control and alt keys because he needed two shift keys to make the operation work, and he chose the delete key because it was on the opposite side of the keyboard. He didn't want people to hit control-alt-delete by accident.
At the 20th anniversary celebration of the release of IBM’s first desktop computer, Bradley minimized his creation of the famous command. “I didn’t realize I was creating a cultural icon when I invented it,” Bradley stated. “I invented it, but Bill [Gates] made it famous.”
Saturday, August 2, 2008
The Father of DNA Computing
One of my friends have a small display system with him to login to his bank account.It displays the security code needed to login his bank account for transactions. Similar systems are used to login secured servers. Did you know the algoritham used for this secure login.This time i like to tell about Leonard Adleman in the trio(Rivest, Shamir, and Adleman) behind RSA Cryptosystem userd for secure login.
Leonard Adleman –
The Father of DNA Computing
Leonard Adleman (born December 31, 1945) is a theoretical computer scientist and professor of computer science and molecular biology at the University of Southern California. He is known for being the inventor of the RSA (Rivest-Shamir-Adleman) cryptosystem in 1977, and of DNA computing. RSA is in
widespread use in security applications, including digital signatures.
Leonard Adleman was interested in math and science ever since he was a child.In 1968, he completed his undergraduate degree at the University of California at Berkeley in mathematics. He entered graduate school at the San Francisco State College only to drop out when he found work as a computer programmer for the Federal Reserve Bank in San Francisco. He returned to Berkeley later and completed a Ph.D in computer science in 1976. He then took an assistant professorship at MIT where he met two other young researchers, Ron Rivest and Adi Shamir. Rivest and Shamir interested Adleman in the work they were doing: building a public key cryptography system. The threeeventually pioneered the one-way function that is now used in public key crypto systems with Rivest and Shamir thinking up possible one-way functions
while Adleman attempted to break them. All together, 42 different functions were tried until they found one that Adleman could not break. This became the basis for the widely used cryptography system which came to bear the initials of the trio: RSA (Rivest, Shamir, and Adleman).
For his contribution to the invention of the RSA cryptosystem, Adleman was a recipient along with Ron Rivest and Adi Shamir of the 2002 ACM Turing Award, often called the Nobel Prize of Computer ScienceAfter the instant fame and recognition for his groundbreaking work, Adleman
became a professor of computer science at USC. At USC, he and student name Fred Cohen, tested the first computer “virus” in 1983.
In 1994, his paper Molecular Computation of Solutions To Combinatorial Problems described the experimental use of DNA as a computational system. In it, he solved a seven-node instance of the Hamiltonian Graph problem, an NP-Complete problem similar to the traveling salesman problem. While the solution to a seven-node instance is trivial, this paper is the first known
instance of the successful use of DNA to compute an algorithm. DNA computing has been shown to have potential as a means to solve several other large-scale combinatorial search problems.
Go on DNA computing, go on...
References: wikipedia, other websites.
friends, thanks for your comments...
Would like to know whether you liked this post or not.
do comments or mail me: "tojeevan@gmail.com"
Leonard Adleman –
The Father of DNA Computing
Leonard Adleman (born December 31, 1945) is a theoretical computer scientist and professor of computer science and molecular biology at the University of Southern California. He is known for being the inventor of the RSA (Rivest-Shamir-Adleman) cryptosystem in 1977, and of DNA computing. RSA is in
widespread use in security applications, including digital signatures.
Leonard Adleman was interested in math and science ever since he was a child.In 1968, he completed his undergraduate degree at the University of California at Berkeley in mathematics. He entered graduate school at the San Francisco State College only to drop out when he found work as a computer programmer for the Federal Reserve Bank in San Francisco. He returned to Berkeley later and completed a Ph.D in computer science in 1976. He then took an assistant professorship at MIT where he met two other young researchers, Ron Rivest and Adi Shamir. Rivest and Shamir interested Adleman in the work they were doing: building a public key cryptography system. The threeeventually pioneered the one-way function that is now used in public key crypto systems with Rivest and Shamir thinking up possible one-way functions
while Adleman attempted to break them. All together, 42 different functions were tried until they found one that Adleman could not break. This became the basis for the widely used cryptography system which came to bear the initials of the trio: RSA (Rivest, Shamir, and Adleman).
For his contribution to the invention of the RSA cryptosystem, Adleman was a recipient along with Ron Rivest and Adi Shamir of the 2002 ACM Turing Award, often called the Nobel Prize of Computer ScienceAfter the instant fame and recognition for his groundbreaking work, Adleman
became a professor of computer science at USC. At USC, he and student name Fred Cohen, tested the first computer “virus” in 1983.
In 1994, his paper Molecular Computation of Solutions To Combinatorial Problems described the experimental use of DNA as a computational system. In it, he solved a seven-node instance of the Hamiltonian Graph problem, an NP-Complete problem similar to the traveling salesman problem. While the solution to a seven-node instance is trivial, this paper is the first known
instance of the successful use of DNA to compute an algorithm. DNA computing has been shown to have potential as a means to solve several other large-scale combinatorial search problems.
Go on DNA computing, go on...
References: wikipedia, other websites.
friends, thanks for your comments...
Would like to know whether you liked this post or not.
do comments or mail me: "tojeevan@gmail.com"
Saturday, March 15, 2008
Linus Torvalds
Linus Torvalds Created the kernel for the GNU/Linux OS
Helsinki, Finland
Hai readers,
Are you using a linux for reading this blog...?
Say thanks to Linus Torvalds, the man behind the first version of Linux.
lets go direct to the Heros details...At 21, he wrote the first version of the Linux (lin-ucks) operating system. The open-source nature of Linux is its greatest strength.
Linus Torvalds was born in 28-Dec-1969, Helsinki, Finland. Torvalds earned his masters degree in computer science at the University of Helsinki, where the computers ran UNIX, an operating system designed by Bell Labs. UNIX was common on huge computers with many users, but it was bulky, expensive, and impractical for personal computers. And there in his computer he installed Minix, a PC-compatible mini-mimic of UNIX, but he wanted something more flexible and user-friendly, so in 1991 Torvalds spent several months writing a compact operating system for his PC. He posted an announcement to the Minix group on USENET, and made the Linux source code available to other nerds free of charge. Programmers everywhere started adding their own improvements, and eventually companies like Red Hat, Corel, Caldera, and Turbo Linux began selling their own versions of Linux.
Linux rarely crashes and its users are largely immune to the gazillion worms and viruses designed to exploit Microsoft's myriad holes and bugs.
Linux? is a registered trademark of Linus Torvalds. The kernel written by Torvalds comprises about 2% of the current Linux, but he still makes the ultimate decisions about which modifications are added and which aren't.
Helsinki, Finland
Hai readers,
Are you using a linux for reading this blog...?
Say thanks to Linus Torvalds, the man behind the first version of Linux.
lets go direct to the Heros details...At 21, he wrote the first version of the Linux (lin-ucks) operating system. The open-source nature of Linux is its greatest strength.Linus Torvalds was born in 28-Dec-1969, Helsinki, Finland. Torvalds earned his masters degree in computer science at the University of Helsinki, where the computers ran UNIX, an operating system designed by Bell Labs. UNIX was common on huge computers with many users, but it was bulky, expensive, and impractical for personal computers. And there in his computer he installed Minix, a PC-compatible mini-mimic of UNIX, but he wanted something more flexible and user-friendly, so in 1991 Torvalds spent several months writing a compact operating system for his PC. He posted an announcement to the Minix group on USENET, and made the Linux source code available to other nerds free of charge. Programmers everywhere started adding their own improvements, and eventually companies like Red Hat, Corel, Caldera, and Turbo Linux began selling their own versions of Linux.
Linux rarely crashes and its users are largely immune to the gazillion worms and viruses designed to exploit Microsoft's myriad holes and bugs.
Linux? is a registered trademark of Linus Torvalds. The kernel written by Torvalds comprises about 2% of the current Linux, but he still makes the ultimate decisions about which modifications are added and which aren't.
Richard Matthew Stallman
Richard Matthew Stallman
Founder, GNU software project, Free Software Foundation.
United States of America
http://www.fsf.org/
Richard Stallman is the founder of the Free Software movement, the GNU project, the Free Software Foundation, and the League for Programming Freedom.
Stallman was born on March 16, 1953, Manhattan, NY. He had his degree from Harvard University in 1971.Stallman spent the summer after his high-school graduation writing his first program, a preprocessor for the IBM 7094 written in the PL/I programming language. Stallman also worked as Laboratory Assistant in the Biology Department at Rockefeller University.
He is perhaps better known by his initials, "RMS". In the first edition of the Hacker's dictionary, he wrote, '"Richard Stallman" is just my mundane name; you can call me "rms".In 1985, Stallman published the GNU Manifesto, which outlined his motivation for creating a free operating system called GNU, which would be compatible with Unix. The name GNU is a recursive acronym for GNU's Not Unix. Soon after, he incorporated the non-profit Free Software Foundation (FSF) to employ free software programmers and provide a legal framework for the free software community. He is a notable programmer whose major accomplishments include GNU Emacs, the GNU C Compiler, and the GNU Debugger.
Richard Stallman, president of the Free Software Foundation says that
"The word 'Free' doesn't refer to price; it refers to freedom,"
The Logo..
Have a nice day...
Send your commentss...
Saturday, January 26, 2008
Ray Tomlinson
Hai dear friends…
Wishing you all a very prosperous new year 2008…
Hotmail, Rediffmail, Yahoo, Gmail … and the list is endless. With various features and sizes all these e-mail providers are conncting several minds who like to write their expressions in long or short notes in a cost effective way.I am sure you are also a frequest user of e-mails. Do you know the man behind this idea…He is Ray Tomlinson... Sir, We express our heartfelt thanks.
Ray Tomlinson
Inventor of e-mail.
Ray Tomlinson graduated in electrical engineering in the MIT and entered to work in the company BBN in 1967, shortly before which its company received the order to work for ARPANET
In 1971, Ray Tomlinson was assigned to a project called SNDMSG. This program was not new, in fact it had existed for a number of years. By today's standards it was more than primitive. All it did was allow users on the same machine to send messages to each other. Users could create text files which would then be delivered to mailboxes on the same machine.
Ray was assigned to make this simple application do a little bit more. As it turned out, he had been working on something called CYPNET, which was intended to transfer files between computers within the ARPANET. So he modified CYPNET to perform one additional task - to append to a file. This was pretty simple and the change was quickly made.
After that, Ray made a decision which changed history. He created the format of the email address. He defined it as a mailbox name, the @ sign, and the machine's node name. He used the @ sign because "it seemed to make sense. I used the @ sign to indicate that the user was 'at' some other host rather than being local." The first email message was unceremoniously sent between two PDP-10 nodes of the ARPANET network. The contents of the first email message is lost to history, but it was probably something like "QWERTYUIOP".
pls put your queries and comments..
All wishes for 2008
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