A piezoelectric transducer is a device that converts electricity into mechanical forces or vibrations. Although piezoelectric transducers have other uses, ultrasonic devices require them. Piezoelectric transducers usually converts electricity into vibrations and vibrations into electricity, although this is not always the case. They rely on two phenomena known as “electrostriction” and “the piezoelectric effect.” How …
QVGA (Quarter Video Graphics Array or Quarter VGA) is a type of resolution whose dimensions are 320×240 pixels. The QVGA display is normally found in devices such as mobile phones and PDAs. The display is also common on other hand-held devices such as game consoles. Resolution Most of the time, the display is in the …
Understanding the Purpose of Host Names In TCP/IP based networks, the packets that are transmitted over the network contain the following IP addresses: The IP address of the computer sending the packet The IP address of the destination computer intended to receive the packet. The IP address information is used to forward the packet to …
Crosstalk is a form of interference caused by signals in nearby conductors. The most common example is hearing an unwanted conversation on the telephone. Crosstalk can also occur in radios, televisions, networking equipment, and even electric guitars. Causes of Crosstalk Crosstalk is caused by coupling, the transfer of electrical energy between conductors. The three main …
Room Temperature Vulcanizing (RTV) silicone is a rubber polymer used to create molds, prototypes, and sealant. It is extremely flexible and quite tear resistant. It is made up of two separate components: a base and a curative. RTV silicone can be poured, sprayed, brushed, or pumped onto a surface. Either moisture or heat dries it, …
The Windows Media Video format, or WMV, was designed by the Microsoft Corporation to support watching movies and Internet videos on personal computers. The WMV format allows large video files to be reduced in size or compressed to better support use over the Internet or a network while maintaining quality. In order to play WMV …
A spot beam is a beam of radio signals that is directed towards a specific area on the Earth’s surface. Spot beams are the opposite of broad beams, which are beams that are directed towards a large area of the Earth’s surface. While broad beams are used for general telecommunication and surveillance, spot beams are …
Backward Error Correction, also known as an “Automatic Repeat Request” is an error correction technique in which a receiving device sends a request to the source device to re-send information. Backward Error Correction is used in situations where some of the transmitted data has been lost or corrupted during transit and the transmitting device must …
MSN Messenger (now called Windows Live Messenger) is the Microsoft instant messaging program that is deployed with all versions of the Microsoft Windows Operating System (OS). The application is also installed on the Xbox 360, the Blackberry OS, the Zune HD, and the Symbian OS 9.x. The program connects the user to the Microsoft .NET …
Enterprise Resource Planning or ERP is actually a process or approach that attempts to consolidate all of a company’s departments and functions into a single computer system that services each department’s specific needs. It is, in a sense, a convergence of people, hardware, and software into an efficient production, service, and delivery system that creates …