GSM (Global System for Mobile communication) is a digital mobile telephone system that is widely used in Europe and other parts of the world. GSM uses a variation of Time Division Multiple Access (TDMA) and is the most widely used of the three digital wireless telephone technologies (TDMA, GSM, and CDMA). GSM digitizes and compresses data, then sends it down a channel with two other streams of user data, each in its own time slot. It operates at either the 900 MHz or 1,800 MHz frequency band. GSM is the Read More

The iSight is a webcam built by Apple that comes in both internal and external variants. The iSight features excellent quality and includes several tools that allow the user to produce professional pictures and videos. In addition, the Apple iSight is capable of video conferencing and remote access for surveillance purposes. The iSight includes a built-in microphone and gets its power from the computer itself so it does not require its own outlet. The webcam has a 640 x 480 resolution and can clearly view objects as close as 55 Read More

Online tutoring is the use of the Internet for tutoring activities. It is the process by which a student learns via the Internet with the help of an subject matter expert or a tutor. This type of tutoring can make use of several web-based programs to achieve its goals. Some of these programs or applications are email, an instant messaging, online whiteboards (as provided with Microsoft netmeeting), etc. Through these programs or applications a tutor can send quizzes, receive accomplished exams, send quiz results and recommendations, teach concepts, etc. Moreover, Read More

A linear actuator is a mechanical device that makes a linear motion, usually via a hydraulic pump or electromagnetic gear. Other forces can be used to create linear motion. The different types of linear actuators include screw, wheel and axle, cam, hydraulic pump, pneumatic, piezoelectric, and electro-mechanical. Linear motors, wax motors, and telescoping linear actuators can also produce linear motion. How a Linear Actuator Works While all linear actuators depend on an external, non-linear force to drive a piston back and forth, different types of linear actuators work in different Read More

Managing the Different Server Roles The different roles that can be configured for Exchange Server 2003 are listed here: Mailbox Store server (back-end server): The mailbox store server is mainly responsible for the following functions: Storing of messages of mail-enabled users. Storing attachments. Storing files and folders. Managing the mailbox store server includes configurations and tasks performed through Exchange System Manager and standard server maintenance tasks. Public Folder server: This server stores messages and message posting in a hierarchical manner. If your system has multiple public folders, then you would Read More

More and more people are realizing that they can connect with people through Internet radio stations and that, for the first time, the average individual who doesn’t have the backing of a major radio station can still gain the support of thousands of listeners. With this in mind, more and more people are moving into the Internet radio station niche and creating all different sorts of radio stations. Some play different types of music while others are talk radio stations. Regardless of the type, creating a internet radio station is Read More

Exchange Server 2003 Virtual Servers Overview Simple Mail Transfer Protocol (SMTP) Virtual Servers Simple Mail Transfer Protocol (SMTP) is an industry standard protocol used for the Internet. SMTP controls the communication of email messages and the message formats between messaging hosts. SMTP Service Extensions (ESMTP) is an extension of SMTP that enables users to request delivery status notifications on outgoing messages. It also makes it possible for a message size to be defined for inbound ESMTP connections. SMTP and ESMTP require the TCP/IP protocol as the transport means. The SMTP/ESMTP Read More

Many businesses have realized that a fan page on Facebook is a very inexpensive way to get more traffic to their website and to bring more customers in the front doors. By getting people to become fans, a business is able to target them, send them messages and let them know about specials and deals. Big businesses and small businesses alike have all started creating pages. Doing so isn't difficult at all. To begin with, login to your Facebook account. You'll need an account to do this so create one Read More

CSS Tutorials CSS – Cascading Style Sheet makes website development a lot easier. Why? You can now apply website designs quick and easy by following the instructions, guides found here in our CSS Tutorial section. Applying CSS Tutorial This tutorial section will show you how to apply CSS to HTML. This covers the 3 ways that you can apply CSS: In-line styles, Internal styles, and External styles. Colors Tutorial This section will show you how to apply colors and background color properties to HTML or any elements. Just so you know, Read More

The AA is the largest motoring organization in the United Kingdom that provides services such as breakdown assistance and motorist insurance. For a number of years, only AA members could take advantage of the company’s route planning services by picking up paper maps and routes from the organization’s local office. The AA now provides free online route planning for consumers on their website’s AA route planner. The online service allows drivers to plan multi-leg trips across the United Kingdom, Ireland, and Europe, and has a number of features that can Read More