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Fence (other)
A fence is a barrier enclosing or bordering a field, yard, etc., usually made of posts and wire or wood, used to prevent entrance, to confine, or to mark a boundary. Fence or fences may also refer to: Entertainment Music * Fences (band), an American rock band *Fences (song), a song by Blanche * "Fences", a song on Paramore's 2007 album ''Riot!'' * "Fences", a song by Phoenix from the 2009 album ''Wolfgang Amadeus Phoenix'' Other media * ''Fence'' (magazine), an American literary magazine * ''Fences'' (play), a 1983 Pulitzer Prize-winning play by August Wilson ** ''Fences'' (film), a 2016 film adaptation of the play, starring Denzel Washington and Viola Davis, and directed by Washington * ''Fence'' (comic book) * Slitherlink or Fences, a logic puzzle published by Nikoli Places * Fence, Wisconsin, a town in the United States * Fence (community), Wisconsin, an unincorporated community in the United States * Fence, Lancashire, a village in England Science and technology * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fence
A fence is a structure that encloses an area, typically outdoors, and is usually constructed from posts that are connected by boards, wire, rails or netting. A fence differs from a wall in not having a solid foundation along its whole length. Alternatives to fencing include a ditch (sometimes filled with water, forming a moat). Types By function * Agricultural fencing, to keep livestock in and/or predators out * Blast fence, a safety device that redirects the high energy exhaust from a jet engine * Sound barrier or acoustic fencing, to reduce noise pollution * Crowd control barrier * Privacy fencing, to provide privacy and security * Temporary fencing, to provide safety, security, and to direct movement; wherever temporary access control is required, especially on building and construction sites * Perimeter fencing, to prevent trespassing or theft and/or to keep children and pets from wandering away. * Decorative fencing, to enhance the appearance of a property, garden ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fence Instruction
In computing, a memory barrier, also known as a membar, memory fence or fence instruction, is a type of barrier instruction that causes a central processing unit (CPU) or compiler to enforce an ordering constraint on memory operations issued before and after the barrier instruction. This typically means that operations issued prior to the barrier are guaranteed to be performed before operations issued after the barrier. Memory barriers are necessary because most modern CPUs employ performance optimizations that can result in out-of-order execution. This reordering of memory operations (loads and stores) normally goes unnoticed within a single thread of execution, but can cause unpredictable behavior in concurrent programs and device drivers unless carefully controlled. The exact nature of an ordering constraint is hardware dependent and defined by the architecture's memory ordering model. Some architectures provide multiple barriers for enforcing different ordering constraint ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chumra (Judaism)
A ''chumra'' ( he, wikt:חומרה, חומרה; pl. ; alternative transliteration: ) is a prohibition or obligation in Judaism, Jewish practice that exceeds the bare requirements of Halakha (Jewish law). One who imposes a ''chumra'' on oneself in a given instance is said to be ''machmir'' (). The rationale for a ''chumra'' comes from Deuteronomy 22:8, which states that when someone builds a house, he must build a fence around the roof in order to avoid guilt should someone fall off the roof. This has been interpreted by many as a requirement to "build a fence around the Torah" in order to protect the mitzvot. An obligation or prohibition can be adopted by an individual or an entire community. Early references to ''chumrot'' are found in the Talmud, and the understanding and application of them has changed over time. Most often found in Orthodox Judaism, ''chumrot'' are variously seen as a precaution against transgressing the Halakha or as a way of keeping those who have taken on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fence (woodworking)
A fence is a part of many woodworking tools, they are typically used to guide or secure a workpiece while it is being sawn, planed, routed or marked. Fences play an important role for both accuracy and safety. Fences are usually straight and vertical, and made from metal, wood or plastic. Most fences either remain static with the workpiece guided along it, or are moved relative to the blade. Auxiliary and a sacrificial fences An auxiliary or sacrificial fence is a fence made of a material not liable to damage the blade – such as wood or plastic – and is usually attached to an existing fence. Such a fence may be used for situations where it is desirable or necessary for the fence to be in contact with, or particularly close to, the blade. They may also be used for attaching accessories to the fence, such as stop blocks and featherboards. Zero-clearance sacrificial fences can also be used to make cleaner cuts. Such fences may be considered sacrificial as they will be cut into ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fence (finance)
Fence (also known as a Dutch Rudder) is an investment strategy that uses options to limit the range of possible returns on a financial instrument. A fence consists of the following elements: * long position in a financial instrument (e.g. a share, index or currency) * long put (normally with a strike price close to or at the current spot price of the financial instrument) * short put (with a strike price lower than the bought put - e.g. 80% of the current spot price) * short call (with a strike price higher than the current spot price). The expiration dates of all the options are usually the same. The call strike is normally chosen in such a way that the sum total of the three option premiums is equal to zero. This investment strategy will ensure that the value of the investment at expiry will be between the strike price In finance, the strike price (or exercise price) of an option is a fixed price at which the owner of the option can buy (in the case of a call), or sell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fence (criminal)
A fence, also known as a receiver, mover, or moving man, is an individual who knowingly buys stolen goods in order to later resell them for profit. The fence acts as a middleman between thieves and the eventual buyers of stolen goods who may not be aware that the goods are stolen. As a verb (e.g. "''to fence'' stolen goods"), the word describes the behaviour of the thief in the transaction with the fence. As is the case with the word ''fence'' and its derivatives when used in its other common meanings (i.e. as a type of barrier or enclosure, and also as a sport), the word in this context is derived from the word ''defence.'' Among criminals, the ''fence'' originated in thieves' slang tracing from the notion of such transactions providing a "defence" against being caught. The thief who patronises the fence is willing to accept a low profit margin in order to reduce their risks by instantly "washing their hands" of illicitly gotten loot (such as black market goods) and disasso ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Air Force Space Surveillance System
The AN/FPS-133 Air Force Space Surveillance System, colloquially known as the Space Fence, was a U.S. government multistatic radar system built to detect orbital objects passing over America. It is a component of the U.S. space surveillance network, and according to the U.S. Navy was able to detect basketball sized () objects at heights up to . The system ceased operation in September 2013. Plans for a new space fence are underway with sites at the Kwajalein Atoll in the Marshall Islands, along with an option for another radar site in Western Australia. The operation's headquarters were at Dahlgren, Virginia, and radar stations were spread out across the continental United States at roughly the level of the 33rd parallel north. Description There were three transmitter sites in the system: * 216.983 MHz at Lake Kickapoo, Texas () (Master transmitter) * 216.970 MHz at Gila River, Arizona () * 216.990 MHz at Jordan Lake, Alabama () The master transmitter at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Outlier
In statistics, an outlier is a data point that differs significantly from other observations. An outlier may be due to a variability in the measurement, an indication of novel data, or it may be the result of experimental error; the latter are sometimes excluded from the data set. An outlier can be an indication of exciting possibility, but can also cause serious problems in statistical analyses. Outliers can occur by chance in any distribution, but they can indicate novel behaviour or structures in the data-set, measurement error, or that the population has a heavy-tailed distribution. In the case of measurement error, one wishes to discard them or use statistics that are robust to outliers, while in the case of heavy-tailed distributions, they indicate that the distribution has high skewness and that one should be very cautious in using tools or intuitions that assume a normal distribution. A frequent cause of outliers is a mixture of two distributions, which may be two dist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fence (statistics)
A fence is a structure that encloses an area, typically outdoors, and is usually constructed from posts that are connected by boards, wire, rails or netting. A fence differs from a wall in not having a solid foundation along its whole length. Alternatives to fencing include a ditch (sometimes filled with water, forming a moat). Types By function * Agricultural fencing, to keep livestock in and/or predators out * Blast fence, a safety device that redirects the high energy exhaust from a jet engine * Sound barrier or acoustic fencing, to reduce noise pollution * Crowd control barrier * Privacy fencing, to provide privacy and security * Temporary fencing, to provide safety, security, and to direct movement; wherever temporary access control is required, especially on building and construction sites * Perimeter fencing, to prevent trespassing or theft and/or to keep children and pets from wandering away. * Decorative fencing, to enhance the appearance of a property, garden ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fence (mathematics)
In mathematics, a fence, also called a zigzag poset, is a partially ordered set (poset) in which the order relations form a path with alternating orientations: :acehbdfi \cdots A fence may be finite, or it may be formed by an infinite alternating sequence extending in both directions. The incidence posets of path graphs form examples of fences. A linear extension of a fence is called an alternating permutation; André's problem of counting the number of different linear extensions has been studied since the 19th century. The solutions to this counting problem, the so-called Euler zigzag numbers or up/down numbers, are: :1, 1, 2, 4, 10, 32, 122, 544, 2770, 15872, 101042. :. The number of antichains in a fence is a Fibonacci number; the distributive lattice with this many elements, generated from a fence via Birkhoff's representation theorem, has as its graph the Fibonacci cube. A partially ordered set is series-parallel if and only if it does not have four elements forming a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fences (software)
Fences is a utility for Windows that helps to organize icons on the desktop. It is developed by Stardock and distributed as part of their Object Desktop suite. Version 1 was freeware after which it has become a commercial product. Functionality Fences defines translucent areas on the desktop that contain groups of icons. These ''fences'' can be individually created, named, moved, and resized — they will also display a scroll bar if necessary. Double-clicking on the desktop hides all non-excluded fences and icons, while another double-click causes them to reappear. Snapshots can restore fences to a particular configuration after use. Reception A ''PC World'' reviewer praised the free edition of Fences, saying that "it wasn't five minutes after installing this program that I realized I'll be using it for the rest of my computing life. It's that good." A preview edition was listed as TechSpot's download of the week in February 2009. Download.com approved of the snapshots, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fencing (computing)
Fencing is the process of isolating a node of a computer cluster or protecting shared resources when a node appears to be malfunctioning.''Sun Cluster environment: Sun Cluster 2.2'' by Enrique Vargas, Joseph Bianco, David Deeths 2001 ISBN page 58 As the number of nodes in a cluster increases, so does the likelihood that one of them may fail at some point. The failed node may have control over shared resources that need to be reclaimed and if the node is acting erratically, the rest of the system needs to be protected. Fencing may thus either disable the node, or disallow shared storage access, thus ensuring data integrity. Basic concepts A node fence (or I/O fence) is a virtual "fence" that separates nodes which must not have access to a shared resource from that resource. It may separate an active node from its backup. If the backup crosses the fence and, for example, tries to control the same disk array as the primary, a data hazard may occur. Mechanisms such as STONITH are d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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