A Quick Introduction to Voice over Internet Protocol (VoIP)



Internet Basics

The basic building block of networks is the IP datagram.
Analogy to datagrams—a postcard with
Destination address
Return address
A small amount of text
A postcard might inform you of a friend’s holiday travels or remind you of a dentist’s appointment.
The postal service doesn’t care which application (friend or dentist) sent the postcard—it just carries processed wood pulp with black marks.

Voice—Another A ....etc

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A Quick Introduction to C Programming



Writing and Running Programs

1. Write text of program (source code) using an editor such as emacs, save as file e.g. my_program.c


2. Run the compiler to convert program from source to an “executable” or “binary”:
$ gcc –Wall –g my_program.c –o my_program

3-N. Compiler gives errors and warnings; edit source file, fix it, and re-compile


A Quick Digression About the Compiler

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QUICK MESSENGER-A CHAT LINE APPLICATION

Introduction
The Quick messenger is a simulation of the instant messenger which has been established within a LAN. The messaging partners can interact in a synchronous fashion via the instant messaging. The correspondense can occur instantly, with the text reaching the other end as soon as the enter key is pressed in the sending end. an easy to use and a rich graphical user interface is also implemented for the project.
A server-client model is used in this project and the server side ....etc

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QUICK CHANGE TOOL POST



My lathe came with a four-way tool post and I wanted to convert to a quick change system. Quick change systems are commercially available, but I decided to make my own, modeled after commercial designs.
Quick change system consists of a Quick Change Tool Post, QCTP and Quick Chance Tool Holders, QCTHs. Commonly, a number of QCTHs are dedicated to hold a particular bit. Any QCTH can be mounted on the QCTP.
The below photographs star ....etc

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How does the crank and slotted lever return mechanism work?? ....etc

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A quick overview on rotatory Brush and Brushless DC Motors



INTRODUCTION
The electric motor in its simplest terms is a converter of electrical energy to useful mechanical energy. It operates on the principle that two magnetic fields within certain prescribed areas react upon each other. One field is produced by a permanent magnet assembly while the other field is produced by an electrical current flowing in the motor windings. These two fields result in a to ....etc

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Quick Installation Guide


Installing COMSOL 4.1 on Linux
1 You may need root privileges to install COMSOL in a system directory. You
may also need root privileges to mount the DVD.
2 The COMSOL installer is an X-windows application so you need to be logged
in with access to an X-windows display.
3 Insert the COMSOL 4.1 DVD into the DVD drive. If the DVD is not
mounted automatically by your operating system, use the mount command to
mount the DVD.
4 To start th ....etc

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Speed Detection for Moving Objects
from Digital Aerial Camera and
QuickBird Sensors.
gopal ....etc

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Can any one help me to find a algorithm for QR (Quick Response) Code... ....etc

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Quick Reference to C Programs



Introduction
C is a remarkable language. Designed originally by Dennis Ritchie, working at AT&T Bell Laboratories in New Jersey, it has increased in use until now it may well be one of the most widely-written computer languages in the world. C is a structured language. It allows variety of programs in small modules. It is easy for debugging, testing, and maintenance if a language is a structured one.
1.2 Structure of a C ....etc

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