Magnets are mainly characterized for having poles: if you put together poles of the same charge they repel and if you put together charges of different pole, they attract. A body will be under Magnetic Levitation when it floats due to that special repelling quality of the magnets, i.e. when the force generated by the electromagnetic repulsion is strong enough to balance the weight of the object. Methods for Obtaining Magnetic Levitation There are different methods for obtaining Magnetic Levitation. For heavy objects, the main are electromagnetic suspension and electrodynamic Read More

Voltage is the measurement for the electrical force between two points that drives the current. More specifically, voltage is the measure of the energy per unit charge that is equal to the electrical potential difference between two measured points. Volts are normally measured by a voltmeter. Voltage drop is the reduction in voltage in an electrical circuit between the source of power and the load on a circuit. Many electrical codes throughout the United States and the developed world set specific guidelines for the maximum voltage drop permitted in an Read More

L2 cache is the second tier of a multi-cache memory system and provides memory to a processor without delay. An L2 cache sits between an L1 and L3 cache and is generally either 256 KB or 512 KB in size. An L2 cache contains frequently used information and prevents the processor from having to search the L3 cache or RAM, which are both much larger in size. Although a processor will first search the L1 cache, it is often the L2 cache that contains the needed information due to the Read More

Sound information that passes through computer speakers can easily be something that one wishes to keep as a recorded piece to use for later. This is a great option to have when one wishes to be able to playback the sound on a different device such as a mobile phone or mp3 player. The simplest answer may seem to be to use a microphone to record the audio. While this option essentially works, it provides very low quality recording with a great deal of distortion. It is entirely possible to Read More

Macintosh Services Overview While in the earlier days, it was somewhat difficult to integrate Macintosh networks and Windows networks because each operating system basically used different protocols, and files structures and systems. To deal with these integration issues, Microsoft has since introduced the File Server for Macintosh (FSM) and Print Server for Macintosh (PSM) services with Windows NT Server. These FSM and PSM Macintosh services are also included with Windows 2000 and Windows Server 2003. When the FSM and PSM Macintosh services are installed, it enables Macintosh clients to access Read More

Fixed/Mobile Mobile Circuit/Packet Circuit Max Bandwidth 57.6Kb Range Coverage area of host network Frequency Frequency of host network Host Network GSM Definer ETSI (European Telecommunications Standards Institute) URL http://www.etsi.org/ HSCSD (High Speed Circuit Switched Data) is a specification for data transfer over GSM networks. HSCSD utilizes up to four 9.6Kb or 14.4Kb time slots, for a total bandwidth of 38.4Kb or 57.6Kb. 14.4Kb time slots are only available on GSM networks that operate at 1,800MHz. 900Mhz GSM networks are limited to 9.6Kb time slots. Therefore, HSCSD is limited to 38.4Kbps Read More

A UMPC is an Ultra Mobile PC. The Origami Ultra Mobile PC is a project by Microsoft that was unveiled last 2006 at a CeBIT exhibition in Hanover, Germany. Initially, Microsoft code named the project 'Project Origami'. Microsoft decided to keep the name as it was popularized by the media. The Origami ultra mobile PC is a $1000 PC utilizing a standard Windows OS. Its size is between a PC tablet and a personal digital assistant. UMPC Operating System Although the UMPC currently runs on Windows XP, Microsoft says that Read More

A ringback number is a number that you call that will immediately ring the telephone from which it was called. In most instances you must call the ringback number, quickly hang up the phone for just a short moment and then let up on the switch, you will then go back off hook and hear a different tone. You may then hang up. You will be called back seconds later. On some systems, you will have to press a button or flash hook again before the final hang up. Ringback Read More

Sneezing is either an annoying or relieving thing for most people. The process of sneezing can occur in many different ways. This irritation can cause misery in some people who simply wish their sneezing to stop. Preventative measures for sneezing is also a possibility for some people. The Biological Process of a Sneeze The actual medical term for a sneeze is known as a sternutation. Sternutations occur when there is reason for the body to clear debris or buildup of mucus from the nasal passages and internal nose hairs. When the microscopic particles are introduced Read More

The coulomb is the standard unit of electric charge. One coulomb is defined as the amount of charge carried by one ampere of current in one second. One coulomb can also be defined as the amount of charge needed to create one volt of potential difference in a one farad capacitor. The symbol for the coulomb is an uppercase C. History of the Coulomb The coulomb was defined at an international conference in 1881, and is named after Charles-Augustin de Coulomb (1736-1806), a French physicist. He discovered Coulomb’s law which Read More