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Switching Tubes
Switching may refer to: Computing and technology * Switching, functions performed by a switch: ** Electronic switching ** Packet switching, a digital networking communications methodology *** LAN switching, packet switching on Local Area Networks ** Telephone switching, the activity performed by a telephone exchange (telephone switching machine) * Switching, a synonym for shunting in rail transport Other uses * Switching (ecology), a pattern of predation describing predators' selection of food based on its abundance * ''Switching'' (film), a 2003 Danish interactive film * Switching (pickleball), when doubles partners switch sides of their court * Code-switching, of languages * Immunoglobulin class switching, an immunological mechanism that changes the type of antibody produced by B cells * Task switching (psychology) Task switching, or set-shifting, is an executive function that involves the ability to ''unconsciously'' shift attention between one task and another. In cont ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Switch
In electrical engineering, a switch is an electrical component that can disconnect or connect the conducting path in an electrical circuit, interrupting the electric current or diverting it from one conductor to another. The most common type of switch is an electromechanical device consisting of one or more sets of movable electrical contacts connected to external circuits. When a pair of contacts is touching current can pass between them, while when the contacts are separated no current can flow. Switches are made in many different configurations; they may have multiple sets of contacts controlled by the same knob or actuator, and the contacts may operate simultaneously, sequentially, or alternately. A switch may be operated manually, for example, a light switch or a keyboard button, or may function as a sensing element to sense the position of a machine part, liquid level, pressure, or temperature, such as a thermostat. Many specialized forms exist, such as the toggle switch, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electronic Switch
In electronics, an electronic switch is an electronic component or device that can switch an electrical circuit, interrupting the current or diverting it from one conductor to another. Electronic switches are considered binary devices because they can be on or off. When an electronic switch is ''on'', the circuit is closed and when it is ''off'', the switch is open in the circuit. Typically, electronic switches use solid state devices such as transistors, though vacuum tubes can be used as well in high voltage applications. Electronic switches also consist of complex configurations that are assisted by physical contact. Physical contact typically comes from pressing or flipping a switch mechanically, but other forms of contact, such as light sensors and magnetic field sensors, are used to operate switches. Types Depending on application, switches are manufactured in many types. Switches operated by a person are called ''hand switches''. Hand switches consist of many types such ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Packet Switching
In telecommunications, packet switching is a method of grouping Data (computing), data into ''network packet, packets'' that are transmitted over a digital Telecommunications network, network. Packets are made of a header (computing), header and a payload (computing), payload. Data in the header is used by networking hardware to direct the packet to its destination, where the payload is extracted and used by an operating system, application software, or protocol suite, higher layer protocols. Packet switching is the primary basis for data communications in computer networks worldwide. In the early 1960s, American computer scientist Paul Baran developed the concept that he called "distributed adaptive message block switching", with the goal of providing a fault-tolerant, efficient routing method for telecommunication messages as part of a research program at the RAND Corporation, funded by the United States Department of Defense. His ideas contradicted then-established principles ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LAN Switching
A network switch (also called switching hub, bridging hub, and, by the IEEE, MAC bridge) is networking hardware that connects devices on a computer network by using packet switching to receive and forward data to the destination device. A network switch is a multiport network bridge that uses MAC addresses to forward data at the data link layer (layer 2) of the OSI model. Some switches can also forward data at the network layer (layer 3) by additionally incorporating routing functionality. Such switches are commonly known as layer-3 switches or multilayer switches. Switches for Ethernet are the most common form of network switch. The first MAC Bridge was invented in 1983 by Mark Kempf, an engineer in the Networking Advanced Development group of Digital Equipment Corporation. The first 2 port Bridge product (LANBridge 100) was introduced by that company shortly after. The company subsequently produced multi-port switches for both Ethernet and FDDI such as GigaSwitch. Digital ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telephone Switching
telephone exchange, telephone switch, or central office is a telecommunications system used in the public switched telephone network (PSTN) or in large enterprises. It interconnects telephone subscriber lines or virtual circuits of digital systems to establish telephone calls between subscribers. In historical perspective, telecommunication terms have been used with different semantics over time. The term ''telephone exchange'' is often used synonymously with ''central office'', a Bell System term. Often, a ''central office'' is defined as a building used to house the inside plant equipment of potentially several telephone exchanges, each serving a certain geographical area. Such an area has also been referred to as the exchange or exchange area. In North America, a central office location may also be identified as a ''wire center'', designating a facility to which a telephone is connected and obtains dial tone. For business and billing purposes, telecommunication carriers defin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telephone Exchange
A telephone exchange, telephone switch, or central office is a telecommunications system used in the public switched telephone network (PSTN) or in large enterprises. It interconnects telephone subscriber lines or virtual circuits of digital systems to establish telephone calls between subscribers. In historical perspective, telecommunication terms have been used with different semantics over time. The term ''telephone exchange'' is often used synonymously with ''central office'', a Bell System term. Often, a ''central office'' is defined as a building used to house the inside plant equipment of potentially several telephone exchanges, each serving a certain geographical area. Such an area has also been referred to as the exchange or exchange area. In North America, a central office location may also be identified as a ''wire center'', designating a facility to which a telephone is connected and obtains dial tone. For business and billing purposes, telecommunication carriers defi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shunting (rail)
Shunting, in railway operations, is the process of sorting items of rolling stock into complete trains, or the reverse. In the United States this activity is known as switching. Motive power Motive power is normally provided by a locomotive known as a ''shunter'' (in the UK) or switcher (in the US). Most shunter/switchers are now diesel-powered but steam and even electric locomotives have been used. Where locomotives could not be used (e.g. because of weight restrictions) shunting operations have in the past been effected by horses or capstans. Hazards Coupling The terms "shunter" and "switcher" are applied not only to locomotives but to employees engaged on the ground with shunting/switching operations. The task of such personnel is particularly dangerous because not only is there the risk of being run over, but on some railway systems—particularly ones that use buffer-and-chain/screw coupling systems—the shunters have to get between the wagons/carriages in order to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Switching (ecology)
Prey switching is frequency-dependent predation, where the predator preferentially consumes the most common type of prey. The phenomenon has also been described as apostatic selection, however the two terms are generally used to describe different parts of the same phenomenon. Apostatic selection has been used by authors looking at the differences between different genetic morphs. In comparison, prey switching has been used when describing the choice between different species.Allen, J.A. (1988) Frequency-dependent selection by predators. Philos. T. Roy. Soc. B 319, 485-503 Definition The term ''switching'' was first coined by the ecologist Murdoch in 1969 to describe the situation where a predator eats disproportionately more of the most common type of prey. Eight years earlier in 1962 the geneticst B. C. Clarke described a similar phenomenon and called it "apostatic selection". Since then the term ''prey switching'' has mainly been used by ecologists, while ''apostatic selection' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Switching (film)
{{Unsourced, date=January 2023 ''Switching'' is the first ever Danish interactive film directed by Morten Schjødt, produced by Oncotype and released in 2003. It was financed by, and in cooperation with, the Danish Film Institute, with the support of the "Development Fund of the Ministry of Culture", the MEDIA Programme of the European Union and the DFI Film Workshop. It is distributed by SF Film A/S. Introduction ''Switching'' is a different type of film that paves the way for new storytelling methods. Switching was specially developed for DVD video. The fascination with interactive expression basically originates in its potential to depict a more fragmented form of reality. The user of this film enters a narrative labyrinth simultaneously unfolding and disrupting the story. There are three elements that explain why ''Switching'' departs from the linear form: #The film can be changed at any time. Consequently, the user can jump back and forth in time and location. #The interf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Switching (pickleball)
This glossary provides definitions and context for terminology related to, and jargon specific to, the sport of pickleball. Words or phrases in italics can be found on the list in their respective alphabetic sections. 0–9 ;0–0:See '' Zero–Zero'' ;0–0–2 or 0–0–start: See '' Zero–Zero–Two''. A ;Ace:Any ''serve'' that is not returned by the ''receiver'', or, more specifically, a serve that the receiver's paddle never touches. The term, originally used in Tennis, has been attributed to American sportswriter Allison Danzig. ;Andiamo!:Meaning "Let's go!" in Italian, it can be heard after a player wins a particularly critical ''point''. The term was popularized in pickleball by professional player Julian Arnold. ;APP:See ''Association of Pickleball Professionals'' ;Approach shot:A shot executed while moving from the ''backcourt'' towards the ''non-volley line''. ;Around-the-post (ATP):A legal shot that travels outside the net posts, allowing its trajectory to stay be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Code-switching
In linguistics, code-switching or language alternation occurs when a speaker alternates between two or more languages, or language varieties, in the context of a single conversation or situation. Code-switching is different from plurilingualism in that plurilingualism refers to the ability of an individual to use multiple languages, while code-switching is the act of using multiple languages together. Multilingualism, Multilinguals (speakers of more than one language) sometimes use elements of multiple languages when conversing with each other. Thus, code-switching is the use of more than one linguistic variety in a manner consistent with the syntax and phonology of each variety. Code-switching may happen between Sentence (linguistics), sentences, sentence fragments, words, or Morpheme, individual morphemes (in synthetic languages). However, some linguists consider the Loanword, borrowing of words or morphemes from another language to be different from other types of code-switchin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Immunoglobulin Class Switching
Immunoglobulin class switching, also known as isotype switching, isotypic commutation or class-switch recombination (CSR), is a biological mechanism that changes a B cell's production of immunoglobulin from one type to another, such as from the isotype IgM to the isotype IgG. During this process, the constant-region portion of the antibody heavy chain is changed, but the variable region of the heavy chain stays the same (the terms ''variable'' and ''constant'' refer to changes or lack thereof between antibodies that target different epitopes). Since the variable region does not change, class switching does not affect antigen specificity. Instead, the antibody retains affinity for the same antigens, but can interact with different effector molecules. Mechanism Class switching occurs after activation of a mature B cell via its membrane-bound antibody molecule (or B cell receptor) to generate the different classes of antibody, all with the same variable domains as the origin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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