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Encyclopedia > Transient

Transient means passing with time. For example, a damped oscillator needs some time after a temporary disturbance to reach the equilibrium again, and after a permanent change in system variables, to reach the new equilibrium. Oscillation is the periodic variation, typically in time, of some measure as seen, for example, in a swinging pendulum. ...

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Acoustics and Audio

A transient is a short-duration signal that represents a nonharmonic attack phase of a musical sound or spoken word. It contains a high degree of nonperiodic components and a higher magnitude of high frequencies than the harmonic content of that sound. Transients do not directly depend on the frequency of the tone they initiate. See also onset (audio). In science, a magnitude is the numerical size of something: see orders of magnitude. ... Onset refers to the beginning of a musical note or other sound, in which the amplitude rises from zero to an initial peak. ...


Sonar

Transient is often used by sonar operators to refer to sudden, unnatural changes in the acoustic environment. This is usually caused by a unnaturally fast moving object. It is most often applied for military use to refer to a probable torpedo entering the water. A modern torpedo, historically called a locomotive torpedo, is a self-propelled projectile that (after being launched above or below the water surface) operates underwater and is designed to detonate on contact or in proximity to a target. ...


Astronomy

A transient astronomical event is a phenomenon that is relatively short-lived. Examples include supernovae, comets, and meteors. Multiwavelength X-ray image of the remnant of Keplers Supernova, SN 1604. ... Comet Hale-Bopp Comet McNaught as seen from Swifts Creek, Victoria, Australia on 23 January 2007 A comet is a small body in the solar system that orbits the Sun and (at least occasionally) exhibits a coma (or atmosphere) and/or a tail â€” both primarily from the effects of... Photo of a burst of meteors with extended exposure time A meteor is the visible path of a meteoroid that enters the Earths (or another bodys) atmosphere, commonly called a shooting star or falling star. ...


Chemical engineering

A system is said to be in transient state when a process variable has been changed and the system has not yet reached steady-state. Example: When a chemical reactor is being brought into operation, the concentrations, temperatures, species compositions, and reaction rates are changing with time until operation reaches it nominal process variables. For alternative meanings see steady state (disambiguation). ...


Civil engineering

Transient is used to refer to a water hammer pressure wave. In a pipe network, when a valve or pump is suddenly shut off, a region of high pressure builds up immediately behind the valve/pump. The high-pressure region grows as water, which was initially flowing out of the valve, suddenly becomes stationary. The border of the high-pressure zone is referred to as a pressure wave, or transient. Water hammer (or, more generally, fluid hammer) is a pressure surge or wave caused by the kinetic energy of a fluid in motion when it is forced to stop or change direction suddenly. ...


Computer science -- Programming

In the Java programming language, transient is a keyword. When a class member is declared transient, it would not be serialized even if the class to which it belongs is serialized. Java is an object-oriented programming language developed by Sun Microsystems in the early 1990s. ... The following are brief definitions of the keywords for the Java programming language. ... In computer science, in the context of data storage and transmission in programming languages like Java, serialization is the process of saving an object onto a storage medium (such as a file, or a memory buffer) or to transmit it across a network connection link, either as a series of...


In Hibernate, transient describes an object which has been instantiated, but is not associated with a Hibernate session, ie. the object resides in memory but is not being persisted. Hibernate is an object-relational mapping (ORM) solution for the Java language: it provides an easy to use framework for mapping an object-oriented domain model to a traditional relational database. ...


For more detail go to: Hibernate.org


Computer science -- Operating Systems

Transient also refers to a module that, once loaded into main memory, is expected to remain in memory for a short time. Today, the term is rarely used, and may be obsolete. Image File history File links Information_icon. ... This article or section does not adequately cite its references or sources. ...


In the mid-to-late 1960s, mainframe computers, such as the IBM System/360, had memory sizes from 8 KB to 512 KB. In order to conserve memory, transients were small modules that supported a specific task, and were swapped in and out of memory. The operating system for the 360 had two areas reserved for transients that supported input/output operations. These were referred to as the “logical transient area,” and the “physical transient area.” If an application program, for example, needed to use the printer, transients that supported printing were brought into the transient areas. If an application needed to use tape drives, transients that supported tape drive access were brought into the transient areas. System 360 Model 65 operators console, with register value lamps and toggle switches (middle of picture) and emergency pull switch (upper right). ...


Electrical and Electronic Engineering

A transient system is a short-lived oscillation in a system caused by a sudden change of voltage, current, or load. These sudden changes are mostly found as the result of the operation of switching devices. Engineers use voltage regulators and surge suppressors to prevent transients in electricity from affecting delicate equipment.


Transients are also deliberately administered to electronic equipment for testing their performance and resiliance to such interference. International standards define the magnitude and methods used to apply them. Typically refer to EN-61000-4-4, the European standard for Fast Transient testing.


The U.S. version of the standard for EFT is IEEE C37.90. Both of these standards are similar. Which standard you choose is based on the intended market.


Japan

A feeling of transience, called Mono no aware, has been important in Japanese culture. Mono no aware (Japanese: 物の哀れ IPA: ??; literally, the pathos of things) is a Japanese term used to describe the awareness of the impermanence of things, and a gentle sadness at their passing. ...


User Interface Design of Mobile Phone

A transient screen is a pop-up screen such as notification or dialog screen in mobile phone. It covers only part of full screen and background will be dimmed. It gives context to user for understanding what is going on background and user can return to background by dismissing the transient screen.


See also


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Simulation of Ground-Water Flow in the Basin-Fill Aquifer of the Tularosa Basin, South-Central New Mexico, ... (10228 words)
The transient simulation is from 1948 to 1995, corresponding to the period of available municipal ground-water-withdrawal data (table 1).
Transient ground-water-flow simulations were done for zero and maximum return-flow scenarios to determine the sensitivity of the model to assumptions regarding return flow.
The lack of sensitivity of the steady-state and transient models to reasonable changes in specified flows and ET parameters justifies the use of a southern specified flow boundary, characterization of Salt Creek and Malpais Spring as specified flow, and constant preselected ET parameters.
Transi.nl Privacy Policy (1297 words)
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Transi does not share, sell or trade with third parties your personal information, such as e-mail addresses, personal information collected as a part of a survey or specific details about you.
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