3D (3 dimensional) images are a representation of an object displayed in three dimensions (length, depth and height). The creation of 3-D graphics can be divided into three phases. The first step, defines the shape of the object in a process called 3D modeling. The second step involves the placement and motion of the objects …
Description of ADSL A special Internet service which is available in many areas is called the Asymmetrical Digital Subscriber Line (ADSL). ADSL connections use existing copper telephone lines to transmit data to and from the ISP. These connections may be limited by proximity to the ISP or the telephone company because the data will lose strength through …
TEMPEST stands for Transient Electromagnetic Pulse Surveillance Technology. Computers and other electronic equipment release interference to their surrounding environment. You may observe this by placing two video monitors close together. The pictures will behave erratically until you space them apart. What is important for an observer is the emission of digital pulses (zeroes and ones) …
We all use electronic devices, whether they are mobile phones, computer routers, MP3 players, cable boxes, etc. These electronic devices include hardware, the physical electronic components and software, programs that help these components run effectively. Firmware is a mix of both. Firmware Firmware is usually defined as a type of program that runs within an …
The MP3 (MPEG-3) format is a compress audio file format widely popular for use on portable media players and for online playback of music. The AVI (Audio Video Interleave) format is a container file format created by the Microsoft Corporation that supports both audio and video content. A task that arises for end-users is the …
Text messaging software allows individuals and businesses to send and receive text messages from a computer to many different cell phones, pagers, and PDAs at once. Many large companies use text messaging software to take advantage of the fact that nearly everyone has a cell phone and that millions of people send and receive text …
The iPhone has become one of the most purchased mobile phones over the past several years. The phone’s home screen includes a number of free, pre-installed applications. Unfortunately, there is no mechanism in place to hide any undesirable, built-in iPhone apps. A common desire for many iPhone users is to hide under-utilized iPhone apps. If …
The “Data Error Cyclic Redundancy Check (CRC)” is a problem with the mathematical process the computer does in order to ensure that data is properly transferred from a particular source to a specified destination. During the cyclic redundancy check, the computer determines if the data being transferred is not damaged. When users get a “Data …
Amplitude modulation is a type of modulation where the carrier signal’s amplitude is varied in accordance with the information bearing signal. The amplitude modulated signal’s envelope or boundary embeds the information bearing signal. The total power of the transmitted signal varies with the modulating signal, whereas the carrier power remains constant. A nonlinear device combines …
Intersymbol interference is a signal distortion in telecommunication. One or more symbols can interfere with other symbols causing noise or a less reliable signal. The main causes of intersymbol interference are multipath propagation or non-linear frequency in channels. This has the effect of a blur or mixture of symbols, which can reduce signal clarity. If …