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Accelerators
Accelerator may refer to: In science and technology In computing *Download accelerator, or download manager, software dedicated to downloading *Hardware acceleration, the use of dedicated hardware to perform functions faster than a CPU ** Graphics processing unit or graphics accelerator, a dedicated graphics-rendering device ***Accelerator (library), a library that allows the coding of programs for a graphics processing unit **Cryptographic accelerator, performs decrypting/encrypting *Web accelerator, a proxy server that speeds web-site access *Accelerator (Internet Explorer), a form of selection-based search *Accelerator table, specifies keyboard shortcuts for commands *Apple II accelerators, hardware devices designed to speed up an Apple II computer * PHP accelerator, speeds up software applications written in the PHP programming language *SAP BI Accelerator, speeds up online analytical processing queries * SSL/TLS accelerator, offloads public-key encryption algorithms to a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Particle Accelerator
A particle accelerator is a machine that uses electromagnetic fields to propel charged particles to very high speeds and energies, and to contain them in well-defined beams. Large accelerators are used for fundamental research in particle physics. The largest accelerator currently active is the Large Hadron Collider (LHC) near Geneva, Switzerland, operated by the CERN. It is a collider accelerator, which can accelerate two beams of protons to an energy of 6.5 TeV and cause them to collide head-on, creating center-of-mass energies of 13 TeV. Other powerful accelerators are, RHIC at Brookhaven National Laboratory in New York and, formerly, the Tevatron at Fermilab, Batavia, Illinois. Accelerators are also used as synchrotron light sources for the study of condensed matter physics. Smaller particle accelerators are used in a wide variety of applications, including particle therapy for oncological purposes, radioisotope production for medical diagnostics, ion ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Accelerator (Internet Explorer)
Accelerators are a form of selection-based search that allows a user to invoke an online service from any other page using only the mouse introduced by Microsoft in Internet Explorer 8. Actions such as selecting the text or other objects will give users access to the usable Accelerator services (such as blogging with the selected text, or viewing a map of a selected geographical location), which can then be invoked with the selected object. According to Microsoft, Accelerators eliminate the need to copy and paste content between web pages. IE8 specifies an XML-based encoding which allows a web application or web service to be invoked as an Accelerator service. How the service will be invoked and for what categories of content it will show up are specified in the XML file. Similarities have been drawn between Accelerators and the controversial smart tags feature experimented with in the IE 6 Beta but withdrawn after criticism (though later included in MS Office). Support for Acce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apple II Accelerators
Apple II accelerators are computer hardware devices which enable an Apple II computer to operate faster than their intended clock rate. 8-bit accelerators Number Nine Apple Booster – ''Number Nine Computer Corporation (Number Nine Visual Technology)'' * Platform: Apple II, Apple II Plus * Form Factor: 50-pin slot card * Speed: 3.58 MHz * Cache: 64 KB on board RAM * DMA compatible: No * Upgradeable: No Number Nine Apple Booster (1982) was one of the first accelerators for the Apple II series of computers. This card is the original version of Saturn's Accelerator II (thus the Accelerator II PCB shares both Saturn Systems' and NNCC's logos.) At $598, the Saturn was much cheaper than the NNCC, but little information about the board is available today. SpeedDemon – ''Microcomputer Technologies (M-c-T)'' * Platform: Apple II, Apple II Plus, Apple IIe * Form Factor: 50-pin slot card * Speed: 3.58 MHz * Cache: 4 KB cache * DMA compatible: No * Upgradeable: No Mic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Accelerator (chemistry)
Accelerants are substances that can bond, mix or disturb another substance and cause an increase in the speed of a natural, or artificial chemical process. Accelerants play a major role in chemistry—most chemical reactions can be hastened with an accelerant. Accelerants alter a chemical bond, speed up a chemical process, or bring organisms back to homeostasis. Accelerants are not necessarily catalysts as they may be consumed by the process. Fire In fire protection, the term accelerant is used very broadly to include any substance or mixture that "accelerates" the development of fire to commit arson. Chemists would distinguish an accelerant from a fuel; the terms are not, in the truest sense of chemical science, interchangeable. Some fire investigators use the term "accelerant" to mean any substance that initiates and promotes a fire without differentiating between an accelerant and a fuel. To a chemical engineer, "gasoline" is not at all considered an "accelerant"; it is more a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Web Accelerator
A web accelerator is a proxy server that reduces website access time. They can be a self-contained hardware appliance or installable software. Web accelerators may be installed on the client computer or mobile device, on ISP servers, on the server computer/network, or a combination. Accelerating delivery through compression requires some type of host-based server to collect, compress and then deliver content to a client computer. Web accelerators may use several techniques to achieve this reduction in access time: They may: *cache recently or frequently accessed documents so they may be sent to the client with less latency or at a faster transfer rate than the remote server could. *freshen objects in the cache ensuring that frequently accessed content is readily available for display. *preemptively resolve hostnames present in a document (HTML or JavaScript) in order to reduce latency. * prefetch documents that are likely to be accessed in the near future. *compress documents ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hardware Acceleration
Hardware acceleration is the use of computer hardware designed to perform specific functions more efficiently when compared to software running on a general-purpose central processing unit (CPU). Any transformation of data that can be calculated in software running on a generic CPU can also be calculated in custom-made hardware, or in some mix of both. To perform computing tasks more quickly (or better in some other way), generally one can invest time and money in improving the software, improving the hardware, or both. There are various approaches with advantages and disadvantages in terms of decreased latency, increased throughput and reduced energy consumption. Typical advantages of focusing on software may include more rapid development, lower non-recurring engineering costs, heightened portability, and ease of updating features or patching bugs, at the cost of overhead to compute general operations. Advantages of focusing on hardware may include speedup, reduced pow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coherent Accelerator Processor Interface
Coherent Accelerator Processor Interface (CAPI), is a high-speed processor expansion bus standard for use in large data center computers, initially designed to be layered on top of PCI Express, for directly connecting central processing units (CPUs) to external accelerators like graphics processing units (GPUs), ASICs, FPGAs or fast storage. It offers low latency, high speed, direct memory access connectivity between devices of different instruction set architectures. History The performance scaling traditionally associated with Moore's Law—dating back to 1965—began to taper off around 2004, as both Intel's Prescott architecture and IBM's Cell processor pushed toward a 4 GHz operating frequency. Here both projects ran into a thermal scaling wall, whereby heat extraction problems associated with further increases in operating frequency largely outweighed gains from shorter cycle times. Over the decade that followed, few commercial CPU products exceeded 4 GHz, wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Accelerator Table
In Windows programming, an accelerator table allows an application to specify a list of ''accelerators'' (keyboard shortcuts) for menu items or other commands. For example, Ctrl+S is often used as a shortcut to the File→Save menu item, Ctrl+O is a common shortcut to the File→Open menu item, etc. An accelerator takes precedence over normal processing and can be a convenient way to program some event handling. Accelerator tables are usually located in the resources section of the binary. Accelerators and menus Each accelerator is associated with a control ID, the same kind of IDs which are assigned to buttons, combo boxes, list boxes, and also menu items. In this way, GUI objects can be created which represent the same function as an accelerator. Since using the menus, and subsequently the mouse, is not always the best solution, it is important to provide users with the possibility to minimize usage of the mouse. For this reason showing the accelerators in menus can be useful; it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ram Accelerator
A ram accelerator is a device for accelerating projectiles or just a single projectile to extremely high speeds using jet-engine-like propulsion cycles based on ramjet or scramjet combustion processes. It is thought to be possible to achieve non-rocket spacelaunch with this technology. It consists of a long tube (barrel) filled with a mixture of combustible gases with a frangible diaphragm at either end to contain the gases. The projectile is fired by another means (e.g., a light-gas gun or railgun) supersonically through the first diaphragm into the tube. Then the projectile burns the gases as fuel, because it is shaped like a ramjet or scramjet core, and accelerates under jet propulsion. Other physics come into play at higher velocities. Description In a normal ramjet, air is compressed between a spike-shaped centerbody and an outer cowling, fuel is added and burned, and high speed exhaust gases are expanded supersonically out of the nozzle to generate thrust. In a ram acceler ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electricothermal Accelerator
A plasma cannon (also called an electrothermal accelerator) is an experimental projectile weapon, which accelerates a projectile by means of a plasma discharge between electrodes at the rear of the barrel, generating a rapid increase in pressure. It functions similarly to other types of firearms, except that it uses a plasma discharge instead of a chemical propellant (e.g. black powder or nitrocellulose). Design To generate the energy required to make a plasma discharge, a high current, high voltage source, and a large capacitor bank are used. Both are attached in series to the electrode system in the cannon's barrel. The capacitor is loaded with as high a voltage as possible. However, militarily useful energy is achieved with as little as several kilojoules. The capacitor is then discharged. The gap between the electrodes ionizes, turning the non-flammable propellant medium into a super heated conductive plasma. Associated volumetric expansion propels the projectile from t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
