Satellite TV works by broadcasting video and audio signals from geostationary satellites to satellite dishes on the Earth’s surface. These geostationary satellites orbit the earth in a region of space known as the Clarke Belt, which is approximately 22,300 miles above the equator. Each of these satellites carries a number of transponders. These transponders each carry a signal back to the Earth. These signals are typically on C Band, Ku Band, or Ka Band. The band of a signal describes, in broad terms, the frequency of the signal. After travelling Read More

LPAR (Logical Partitioning) is a way of subdividing all of a computer’s resources, including the memory, storage, and processors, and splitting them up into smaller logical units that can each be run as a separate part of the operating system (OS). In order for LPAR to be implemented, it requires the computer to have specialized hardware circuits that separate the computing system’s various functions such as server/client actions, database functions, web server functions, or different language services. LPAR also helps segregate testing from production environments on the same computer since, Read More

Google Plus, which Google sponsors, is a social networking service that allows users to communicate with friends, family members, and co-workers in ways that other social networking services such as Myspace, Facebook, and Twitter do not allow. For example, a Google Plus feature known as “Circles” allows users to place their friends into separate categories and only send status updates to friends in a specific Circle. Google Plus features also include Huddle, Talk, Hangout, and Sparks.   How to Ignore Friends on Google Plus Rather than completely removing friends from Read More

Database Server Security Overview When it comes to securing database servers, the actual database software usually provides some security features or mechanism which you can implement. A common database is Microsoft SQL Server which you can manage through its Enterprise Manager tool. The Enterprise Manager can be found in the SQL Server program group. It is recommended that you do not expose your SQL Server databases to public networks such as the Internet. If you do have to connect a SQL Server database to the Internet, a firewall should be Read More

Someone who has worked in a corporation or with a large organization might have heard the phrase “change management” used from time to time. Change management has been around for a while, but has become extremely popular with organizations or corporations that would like to initiate significant change to processes that can include both work tasks and culture. Change management can be defined as a set of processes that is employed to ensure that significant changes are implemented in an orderly, controlled, and systematic fashion to effect organizational change. One Read More

Ultra HD (Ultra High Definition), also called UHDV (Ultra High Definition Video) and Super Hi-Vision, is a digital video format proposed by the Japanese research group and broadcasting company, NHK Science and Technical Research Laboratories. Ultra HD is a giant leap forward from HDTV. It provides a video resolution that contains 16 times more pixels than a conventional HDTV. That is, against 1,080 lines of resolution of HDTV, Ultra HD offers 4,320. More precisely, Ultra HD provides 7,680 x 4,320 pixels in a widescreen aspect ratio of 16×9, for a Read More

A browser cookie is a small piece of information sent by a web server to a web browser to be stored for future use. The data in the browser cookie will be sent back to the web server whenever the browser reconnects to the web site. Cookies are commonly used to store user preference information, such as web site options. Cookies are also used to store shopping cart contents. Cookies are also used to store authentication data, such as user names and passwords. How Websites Use Cookies Cookies are extremely Read More

ADSL (Asymmetric Digital Subscriber Line) options are available in many locations. The speeds will vary for the service in many ways depending on several factors. The reason why it is called an Asymmetric Digital Subscriber Line is simple, as the speed for downloads will be significantly faster than the upload speed. This is because consumer DSL services are usually used for downloading more so than uploading. The typical speeds will range from 375Kbps download and 128Kbps upload to 3072Kbps download and 448Kbps upload. The speed could go much higher when using wide area network ADSL Read More

A pulsation dampener is a device that can reduce or eliminate the intermittent gaps left in a pressurized system during the system’s discharge stroke. Pulsation dampeners are made for a variety of applications and can be used in virtually all pressurized devices to protect hardware, decrease maintenance costs, decrease down time, increase performance, and increase efficiency. Pulsation dampeners are often used in electronic or mechanical devices that work underwater or in other pressurized environments. While vibrations and hydraulic shock do not usually damage these types of systems, long-term exposure to Read More

Nanoyarn is strings of yarn made out of carbon nanotubes that, according to some researchers and one company, can be made to the length of one kilometer. Considering a nanometer is one billionth of a meter, it has left some in disbelief at the ability of creating such strong and durable sheets of nanoparticles that, when formed together, can create incredible structures. What are Carbon Nanotubes? Carbon nanotubes are tubes of carbon atoms that are only about 1 nanomater in length. When looking at a carbon nanotube at the atomic Read More