One of the biggest costs associated with owning an Epson printer is paying for new printer cartridges. The Epson Company follows the printer industry practice of selling the devices at a low price as a loss leader, and then make profit off of selling new ink cartridges. To combat the practice of consumers refilling cartridges on their own, Epson has manufactured the majority of their inkjet cartridges with “smart chips” since 2000. These chips transmit a signal to the printer when empty. They will also “remember” that the printer cartridge Read More

The Ku band (Kurtz-under band) is primarily used for satellite communications, particularly for editing and broadcasting satellite television. This band is split into multiple segments broken down into geographical regions, as the ITU (International Telecommunication Union) determines. The Ku band is a portion of the electromagnetic spectrum in the microwave range of frequencies ranging from 11.7 to 12.7GHz. (downlink frequencies) and 14 to 14.5GHz (uplink frequencies). The most common Ku band digital reception format is DVB (main profile video format) vs the studio profile digital video format or the full-blown Read More

A TFT monitor is a LCD display that uses thin-film transistor technology. Flat panel displays are quickly becoming the dominant display of choice and are replacing cathode ray tubes. These days, nearly all of the LCD monitors that are designed and developed use TFT technology to provide the picture. They were developed because, in the past, there was a reliance on the passive matrix LCD display. These were unable to keep up with images that moved quickly. For example, moving the mouse on a computer from two points would disappear Read More

Whenever you make a dramatic change to your computer, such as installing a new operating system, reformatting the drive partition, or editing the system files, you need to backup your entire disk. Most of the time, system changes go through with no problems but if you do not back up your drive beforehand, you can lose everything that was on your computer. There are many methods to backing up your computer and each method has its own pros and cons. In this article, we will go over each of these Read More

Luminous flux (luminous power) is the measurement of the (perceived) power of light. It is adjusted to take the human eye’s sensitivity to the different wavelengths of light into account. Luminous flux differs from radiant flux in this manner, since radiant flux is a measurement of the total power of light emitted independent of wavelength. What is the SI Unit of Luminous Flux? The unit of measurement that is associated with luminous flux is the lumen (lm). A single lumen is the amount of light that produces a single candela Read More

Mozilla Firefox, which the Mozilla Foundation runs and Netscape owns, is a web browser that allows users to browse the web, check email, play browser-based online games, and take advantage of thousands of add-ons that are not found in any other web browser. Mozilla Firefox was designed to be user friendly and highly functional, gaining much of its support from volunteers. Mozilla Firefox is considered one of the most popular web browsers in the world.   Homepage Users can customize their Firefox homepage in two different ways. In order to Read More

System Administration concepts such as storage virtualization simply separate the logical storage from physical storage on a storage medium. This provides greater flexibility for systems administrators in managing storage for end users on the system. Storage virtualization is an essential part of keeping everything allocated correctly on the physical medium which is accessible by the end users. Address Space Remapping The physical location in which all of the data is stored does not usually stay in a localized area for large amounts of traffic. The purpose of virtualization is to give the users Read More

Configuring Exchange Virtual Server Settings Exchange System Manager can be used to create new Exchange Server 2003 virtual servers. A Protocols container exists below each server object. Expand the nodes in the console tree of Exchange System Manager to view this. Each Internet protocol is signified by a different container. Any related virtual protocol servers are bundled together. To add a new virtual server, right click on the particular protocol container, select New, and then select the associated Virtual Server command. A unique IP address and name has to be Read More

Real Message Center is a product of the popular media player, RealPlayer, that displays notifications concerning updates, upgrades, and new available software that the user has signed up to receive. However, many users soon regret signing up for Real Message Center notifications or may not have wanted to receive them in the first place. Real Message Center runs in the computer background whenever RealPlayer is running and displays notifications every few minutes. While this is usually not a devastating issue, these messages can be a nuisance, especially when a user Read More

An .r01 file is a RAR archive split into several parts. The RAR archive is actually a compression utility and can handle virtually any file. For example, in a four-part archive called “sample”, the separate parts would be “sample.rar”, “sample.r00”, “sample.r01”, and “sample.r02”. Sample.rar would be the first part in a multi-part series, each followed by .rnn, depending on the size of the file. Splitting files into several small parts is most commonly done for posting to Usenet newsgroups. A RAR sequence always starts with .rar, .r00, .r01, .r02, etc. Read More