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Sunday, January 29, 2012

Haptics and Virtual Reality

What is Haptics ?

Haptic technology, or haptics, is a tactile feedback technology which takes advantage of the sense of touch by applying forces, vibrations, or motions to the user.The word haptic, from the Greek ἁπτικός (haptikos), means pertaining to the sense of touch and comes from the Greek verb ἅπτεσθαι haptesthai, meaning to contact or to touch.


Virtual reality

Haptics are gaining widespread acceptance as a key part of virtual reality systems, adding the sense of touch to previously visual-only solutions. Most of these solutions use stylus-based haptic rendering, where the user interfaces to the virtual world via a tool or stylus, giving a form of interaction that is computationally realistic on today's hardware. Systems are being developed to use haptic interfaces for 3D modeling and design that are intended to give artists a virtual experience of real interactive modeling. Researchers from the University of Tokyo have developed 3D holograms that can be "touched" through haptic feedback using "acoustic radiation" to create a pressure sensation on a user's hands.

Courtesy : Wikipedia

UGC - JRF & NET Coaching in Computer Science 2012 in Calicut

UGC - JRF & NET Coaching in Computer Science 2012 based on New Exam Pattern.

UGC - JRF & NET Coaching in Computer Science 2012 New batch is likely to start from next week onwards at Farook College . Classes on all Sundays. Second Saturday  and Govt Holidays.Coaching Sessions are handled by eminent teachers ( Phd Holders ) . contact no 9809805202

Organized by YES India Computer Science Forum
Al-Farook Education Centre
Farook College

Wednesday, January 25, 2012

Asynchronous transmission Vs Synchronous transmission

Asynchronous transmission refers to the case when the sender commences transmission of bytes at any instant of time. Asynchronous transmission uses start and stop bits to signify the beginning bit. ASCII character would actually be transmitted using 10 bits. For example, "0100 0001" would become "1 0100 0001 0". The extra one (or zero, depending on parity bit) at the start and end of the transmission tells the receiver first that a character is coming and secondly that the character has ended. 

Synchronous transmission uses no start and stop bits, but instead synchronizes transmission speeds at both the receiving and sending end of the transmission using clock signal(s) built into each component. A continual stream of data is then sent between the two nodes. Due to there being no start and stop bits the data transfer rate is quicker although more errors will occur, as the clocks will eventually get out of sync, and the receiving device would have the wrong time that had been agreed in the protocol for sending/receiving data, so some bytes could become corrupted (by losing bits).
A unique sequence of fixed number of bits ,  called flag is prefixed to each data block , called frame . The receiver first detects the flag bits and then identifies the boundaries of frame.

Tuesday, January 24, 2012

Function overloading Vs Operator overloading

C++ enables several functions of the same name to be defined, as long as these functions have different sets of parameters. This capablity is called function overloading.  When an overloaded function is called, the C++ compiler selects the proper function by examining the number, types and order of the arguments in the call ie the signature of the function.

Operator overloading allows existing C++ operators to be redefined so that they work on objects of user defined classes.

Saturday, January 21, 2012

What is Java ?

Java is an object oriented programming language developed initially by James Gosling and colleagues at Sun Microsystems. The language initially called Oak ( named after oak trees Gosling's office premises ) , was intended to replace C++. Recently Sun Microsystems acquired by Oracle.

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Monday, January 9, 2012

Re Test For HSST Computer Science


Finally Kerala PSC decided to conduct a re test for HSST computer Science .It is based on the various allegations . The main allegation was that most of the questions were copied from one guide published by GK publishers in Noida .

So let us ready for another Exam.

Best Wishes.
Courtesy : Malayala Manorama and Madhyamam Daily News dt 10/01/2012

Friday, January 6, 2012

What is a DirectX?

DirectX is a Windows technology that enables higher performance in graphics and sound when you are playing games or watching video on your PC.