|
Shadowing (scattering)
Shadowing may refer to: * Shadow fading in wireless communication, caused by obstacles * File shadowing, to provide an exact copy of or to mirror a set of data * Job shadowing, learning tasks by first-hand observation of daily behavior * Projective shadowing, a process by which shadows are added to 3D computer graphics * Variable shadowing, a variable naming issue in computer programming * Speech shadowing, a type of experiment in psycholinguistics * Nuclear shadowing, an effect in nuclear and particle physics * Surveillance, following someones movements See also * * * Shadow (other) * The shadowing lemma In the theory of dynamical systems, the shadowing lemma is a lemma Lemma may refer to: Language and linguistics * Lemma (morphology), the canonical, dictionary or citation form of a word * Lemma (psycholinguistics), a mental abstraction of a w ..., a key result in the theory of dynamical systems * Shading {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shadow Fading
In wireless communications, fading is variation of the attenuation of a signal with various variables. These variables include time, geographical position, and radio frequency. Fading is often modeled as a random process. A fading channel is a communication channel that experiences fading. In wireless systems, fading may either be due to multipath propagation, referred to as multipath-induced fading, weather (particularly rain), or shadowing from obstacles affecting the wave propagation, sometimes referred to as shadow fading. Key concepts The presence of reflectors in the environment surrounding a transmitter and receiver create multiple paths that a transmitted signal can traverse. As a result, the receiver sees the superposition of multiple copies of the transmitted signal, each traversing a different path. Each signal copy will experience differences in attenuation, delay and phase shift while traveling from the source to the receiver. This can result in either construc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
File Shadowing
In digital file management, copying is a file operation that creates a new file which has the same content as an existing file. Computer operating systems include file copying methods to users, with operating systems with graphical user interfaces ( GUIs) often providing copy-and-paste or drag-and-drop methods of file copying. Operating systems may have specialized file copying APIs are usually able to tell the server to perform the copying locally, without sending file contents over the network, thus greatly improving performance. Description File copying is the creation of a new copy file which has the same content as an existing file. Shadow There are several different technologies that use the term shadowing, but the intent of shadowing within these technologies is to provide an exact copy (or mirror of a set) of data. For shadowing to be effective, the shadow needs to exist in a separate physical location than the original data. Depending on the reasons behind t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Job Shadowing
Job shadowing (or work shadowing) is a type of on-the-job learning. It may be a part of an onboarding process, or part of a career or leadership development program. Job shadowing involves following and observing another employee who might have a different job in hand, have something to teach, or be able to help the person who is shadowing learn new aspects related to the job, organization, certain behaviors or competencies. * New job training: An individual planning to take up a different role in the same organization may be asked to shadow the current incumbent for a couple of days to a couple of months to get a better idea of their role. This helps the individuals who are shadowing to understand the particulars of the job without the commitment of the responsibility. This allows the individual to be more confident, aware, and better prepared to take up the role. For the organization, job training reduces the chances of failure, and reduces the time required for the individual to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Projective Shadowing
Shadow mapping or shadowing projection is a process by which shadows are added to 3D computer graphics. This concept was introduced by Lance Williams in 1978, in a paper entitled "Casting curved shadows on curved surfaces." Since then, it has been used both in pre-rendered and realtime scenes in many console and PC games. Shadows are created by testing whether a pixel is visible from the light source, by comparing the pixel to a z-buffer or ''depth'' image of the light source's view, stored in the form of a texture. Principle of a shadow and a shadow map If you looked out from a source of light, all of the objects you can see would appear in light. Anything behind those objects, however, would be in shadow. This is the basic principle used to create a shadow map. The light's view is rendered, storing the depth of every surface it sees (the shadow map). Next, the regular scene is rendered comparing the depth of every point drawn (as if it were being seen by the light, rather tha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Variable Shadowing
In computer programming, variable shadowing occurs when a variable declared within a certain scope (decision block, method, or inner class) has the same name as a variable declared in an outer scope. At the level of identifiers (names, rather than variables), this is known as name masking. This outer variable is said to be shadowed by the inner variable, while the inner identifier is said to ''mask'' the outer identifier. This can lead to confusion, as it may be unclear which variable subsequent uses of the shadowed variable name refer to, which depends on the name resolution rules of the language. One of the first languages to introduce variable shadowing was ALGOL, which first introduced blocks to establish scopes. It was also permitted by many of the derivative programming languages including C, C++ and Java. The C# language breaks this tradition, allowing variable shadowing between an inner and an outer class, and between a method and its containing class, but not between ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Speech Shadowing
Speech shadowing is a psycholinguistic experimental technique in which subjects repeat speech at a delay to the onset of hearing the phrase. The time between hearing the speech and responding, is how long the brain takes to process and produce speech. The task instructs participants to shadow speech, which generates intent to reproduce the phrase while motor regions in the brain unconsciously process the syntax and semantics of the words spoken. Words repeated during the shadowing task would also imitate the parlance of the shadowed speech. The reaction time between perceiving speech and then producing speech has been recorded at 250 ms for a standardised test. However, for people with left dominant brains, the reaction time has been recorded at 150 ms. Functional imaging finds that the shadowing of speech occurs through the dorsal stream. This area links auditory and motor representations of speech through a pathway that starts in the superior temporal cortex, extends to the inferi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Shadowing
*
*
{{Disamb ...
Nuclear may refer to: Physics Relating to the nucleus of the atom: *Nuclear engineering *Nuclear physics *Nuclear power *Nuclear reactor *Nuclear weapon *Nuclear medicine *Radiation therapy *Nuclear warfare Mathematics *Nuclear space *Nuclear operator *Nuclear congruence *Nuclear C*-algebra Biology Relating to the nucleus of the cell: * Nuclear DNA Society *Nuclear family, a family consisting of a pair of adults and their children Music * "Nuclear" (band), group music. * "Nuclear" (Ryan Adams song), 2002 *"Nuclear", a song by Mike Oldfield from his ''Man on the Rocks'' album * ''Nu.Clear'' (EP) by South Korean girl group CLC See also *Nucleus (other) *Nucleolus *Nucleation *Nucleic acid *Nucular ''Nucular'' is a common, proscribed pronunciation of the word "wikt:nuclear, nuclear". It is a eye dialect, rough phonetic spelling of . The ''Oxford English Dictionary''s entry dates the word's first published appearance to 1943. Dictionary not ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Surveillance
Surveillance is the monitoring of behavior, many activities, or information for the purpose of information gathering, influencing, managing or directing. This can include observation from a distance by means of electronic equipment, such as closed-circuit television (CCTV), or interception of electronically transmitted information like Internet traffic. It can also include simple technical methods, such as Human intelligence (intelligence gathering), human intelligence gathering and postal interception. Surveillance is used by citizens for protecting their neighborhoods. And by governments for intelligence gathering - including espionage, prevention of crime, the protection of a process, person, group or object, or the investigation of crime. It is also used by criminal organizations to plan and commit crimes, and by businesses to Industrial espionage, gather intelligence on criminals, their competitors, suppliers or customers. Religious organisations charged with detecting he ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shadow (other)
A shadow is a region of darkness where light is blocked. Shadow or Shadows may also refer to: Places * Shadow, Virginia, an unincorporated community in the US People * M. Shadows (born 1981), lead singer for Avenged Sevenfold *Mary Shadow (1925–1992), American politician from Tennessee Nickname or stage name * Norvell Austin (born 1958) or Shadow, professional wrestler * Lance Hoyt (born 1977) or Shadow, professional wrestler * Jefferson King (born 1961) or Shadow, athlete from ''Gladiators'' * DJ Shadow (born 1972), turntablist musician, producer, and songwriter * Mighty Shadow (1941–2018), Trinidad calypsonian * The Shadow (rapper) (born 1977), Israeli hip hop artist *The Shadow, a professional wrestler from United States Wrestling Association * Dorian Yates (born 1962) "The Shadow", former professional bodybuilder * Black Shadow (wrestler), Black Shadow, Mexican professional Lucha Libre wrestler * Shadoe Stevens (born 1947), American radio host, voiceover actor, and tele ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shadowing Lemma
In the theory of dynamical systems, the shadowing lemma is a lemma Lemma may refer to: Language and linguistics * Lemma (morphology), the canonical, dictionary or citation form of a word * Lemma (psycholinguistics), a mental abstraction of a word about to be uttered Science and mathematics * Lemma (botany), a ... describing the behaviour of pseudo-orbits near a hyperbolic invariant set. Informally, the theory states that every pseudo-orbit (which one can think of as a numerically computed trajectory with rounding errors on every step) stays uniformly close to some true trajectory (with slightly altered initial position)—in other words, a pseudo-trajectory is "shadowed" by a true one. This suggests that numerical solutions can be trusted to represent the orbits of the dynamical system. However, caution should be exercised as some shadowing trajectories may not always be physically realizable. Formal statement Given a map ''f'' : ''X'' → ''X'' of a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dynamical Systems Theory
Dynamical systems theory is an area of mathematics used to describe the behavior of complex dynamical systems, usually by employing differential equations or difference equations. When differential equations are employed, the theory is called ''continuous dynamical systems''. From a physical point of view, continuous dynamical systems is a generalization of classical mechanics, a generalization where the equations of motion are postulated directly and are not constrained to be Euler–Lagrange equations of a least action principle. When difference equations are employed, the theory is called ''discrete dynamical systems''. When the time variable runs over a set that is discrete over some intervals and continuous over other intervals or is any arbitrary time-set such as a Cantor set, one gets dynamic equations on time scales. Some situations may also be modeled by mixed operators, such as differential-difference equations. This theory deals with the long-term qualitative behav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
