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Timing Considerations Of Hemodynamic Modulation
Timing is the tracking or planning of the spacing of events in time. It may refer to: * Timekeeping, the process of measuring the passage of time * Synchronization, controlling the timing of a process relative to another process * Time metrology, the measurement of time Timing in different fields * Timing (comedy), use of rhythm, tempo and pausing to enhance comedy and humour * Timing (linguistics), rhythmic division of time into equal portions by a language * Timing (music), ability to "keep time" accurately and to synchronise to an ensemble * Color timing, photochemical process of altering and enhancing the color of an image * Ignition timing, timing of piston and crankshaft so that a spark will occur near the end of the compression stroke * Market timing, by attempting to predict future market price movements * Memory timings (or RAM timings), measure of the performance of DRAM memory * Valve timing In a piston engine, the valve timing is the precise timing of the opening ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
US Navy 030506-N-5862D-128 An Instructor In The Freedom Hall Athletic Complex Uses A Stopwatch While Recruits Run A 1
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territories, nine Minor Outlying Islands, and 326 Indian reservations. The United States is also in free association with three Pacific Island sovereign states: the Federated States of Micronesia, the Marshall Islands, and the Republic of Palau. It is the world's third-largest country by both land and total area. It shares land borders with Canada to its north and with Mexico to its south and has maritime borders with the Bahamas, Cuba, Russia, and other nations. With a population of over 333 million, it is the most populous country in the Americas and the third most populous in the world. The national capital of the United States is Washington, D.C. and its most populous city and principal financial center is New York City. Paleo-Americans ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Time
Time is the continued sequence of existence and events that occurs in an apparently irreversible succession from the past, through the present, into the future. It is a component quantity of various measurements used to sequence events, to compare the duration of events or the intervals between them, and to quantify rates of change of quantities in material reality or in the conscious experience. Time is often referred to as a fourth dimension, along with three spatial dimensions. Time has long been an important subject of study in religion, philosophy, and science, but defining it in a manner applicable to all fields without circularity has consistently eluded scholars. Nevertheless, diverse fields such as business, industry, sports, the sciences, and the performing arts all incorporate some notion of time into their respective measuring systems. 108 pages. Time in physics is operationally defined as "what a clock reads". The physical nature of time is addre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Timekeeping
Time is the continued sequence of existence and events that occurs in an apparently irreversible succession from the past, through the present, into the future. It is a component quantity of various measurements used to sequence events, to compare the duration of events or the intervals between them, and to quantify rates of change of quantities in material reality or in the conscious experience. Time is often referred to as a fourth dimension, along with three spatial dimensions. Time has long been an important subject of study in religion, philosophy, and science, but defining it in a manner applicable to all fields without circularity has consistently eluded scholars. Nevertheless, diverse fields such as business, industry, sports, the sciences, and the performing arts all incorporate some notion of time into their respective measuring systems. 108 pages. Time in physics is operationally defined as "what a clock reads". The physical nature of time is addressed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Synchronization
Synchronization is the coordination of events to operate a system in unison. For example, the conductor of an orchestra keeps the orchestra synchronized or ''in time''. Systems that operate with all parts in synchrony are said to be synchronous or ''in sync''—and those that are not are '' asynchronous''. Today, time synchronization can occur between systems around the world through satellite navigation signals and other time and frequency transfer techniques. Navigation and railways Time-keeping and synchronization of clocks is a critical problem in long-distance ocean navigation. Before radio navigation and satellite-based navigation, navigators required accurate time in conjunction with astronomical observations to determine how far east or west their vessel traveled. The invention of an accurate marine chronometer revolutionized marine navigation. By the end of the 19th century, important ports provided time signals in the form of a signal gun, flag, or dropping time ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Time Metrology
Time metrology or time and frequency metrology is the application of metrology for time keeping, including frequency stability. Its main tasks are the realization of the second as the SI unit of measurement for time and the establishment of time standards and frequency standards as well as their dissemination. Time transfer See also *Allan variance *Atomic clock *Chronometry *Clock drift *Coordinated Universal Time *Frequency drift *History of timekeeping devices *International Bureau of Weights and Measures *International Earth Rotation and Reference Systems Service *Time and Frequency Standards Laboratory The Time and Frequency Standards Laboratory is a part of the National Physical Laboratory in New Delhi which maintains and calibrates the Indian Standard Time. Features of the Time and Frequency Standards Lab include: * Four caesium and rubidi ... * Time deviation References Further reading * * Time Frequency Metrology {{time-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Timing (comedy)
Comic timing emerges from a performer's joke delivery: they interact with an audience— intonation, rhythm, cadence, tempo, and pausing—to guide the audience's laughter, which then guides the comedic narrative. The pacing of the delivery of a joke can have a strong impact on its comedic effect, even altering its meaning; the same can also be true of more physical comedy such as slapstick. Comic timing is also crucial for comedic video editing to maximize the impact of a joke, for example, through a smash cut. History The use of comic timing can be first observed in the comic plays of the ancient Greeks. Specifically, Aristophanes indicated brief pauses in his works, such as ''The Clouds'', in order to elicit laughter from the unfolding events. William Shakespeare, along with comic playwrights before him, also utilized comic timing in much of his plays. For example, Cleopatra's strategic interjections during Mark Antony's speech in Act 1 Scene 2 of ''Antony and Cleopatra'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Timing (linguistics)
Isochrony is the postulated rhythmic division of time into equal portions by a language. Rhythm is an aspect of prosody, others being intonation, stress, and tempo of speech. Three alternative ways in which a language can divide time are postulated: # The duration of every syllable is equal (syllable-timed); # The duration of every mora is equal (mora-timed). # The interval between two stressed syllables is equal (stress-timed). The idea was first expressed thus by Kenneth L. Pike in 1945, though the concept of language naturally occurring in chronologically and rhythmically equal measures is found at least as early as 1775 (in ''Prosodia Rationalis''). This has implications for linguistic typology: D. Abercrombie claimed "As far as is known, every language in the world is spoken with one kind of rhythm or with the other ... French, Telugu and Yoruba ... are syllable-timed languages, ... English, Russian and Arabic ... are stress-timed languages." While many linguists find the i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Timing (music)
Timing in music refers to the ability to "keep time" accurately and to synchronise to an ensemble, as well as to expressive timing—subtle adjustment of note or beat duration, or of tempo, for aesthetic effect. Research in music cognition has shown that time as a subjective structuring of events in music, differs from the concept of time in physics. Listeners to music do not perceive rhythm on a continuous scale, but recognise rhythmic categories that function as a reference relative to which the deviations in timing can be appreciated.Honing, H. (2002) ''Structure and interpretation of rhythm and timing'' in ''Dutch Journal of Music Theory (Tijdschrift voor Muziektheorie)''. vol 7(3), p. 227-23pdf/ref> Temporal patterns in music combine two different time scales—rhythmic durations such as half and quarter notes on the one hand, and on the other, the continuous timing variations that characterize an expressive musical performance. See also *Rhythm *Time signature The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Color Timing
Color (American English) or colour (British English) is the visual perceptual property deriving from the spectrum of light interacting with the photoreceptor cells of the eyes. Color categories and physical specifications of color are associated with objects or materials based on their physical properties such as light absorption, reflection, or emission spectra. By defining a color space, colors can be identified numerically by their coordinates. Because perception of color stems from the varying spectral sensitivity of different types of cone cells in the retina to different parts of the spectrum, colors may be defined and quantified by the degree to which they stimulate these cells. These physical or physiological quantifications of color, however, do not fully explain the psychophysical perception of color appearance. Color science includes the perception of color by the eye and brain, the origin of color in materials, color theory in art, and the physics of electromag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ignition Timing
In a spark ignition internal combustion engine, ignition timing is the timing, relative to the current piston position and crankshaft angle, of the release of a spark in the combustion chamber near the end of the compression stroke. The need for advancing (or retarding) the timing of the spark is because fuel does not completely burn the instant the spark fires. The combustion gases take a period of time to expand and the angular or rotational speed of the engine can lengthen or shorten the time frame in which the burning and expansion should occur. In a vast majority of cases, the angle will be described as a certain angle advanced ''before top dead center'' (BTDC). Advancing the spark BTDC means that the spark is energized prior to the point where the combustion chamber reaches its minimum size, since the purpose of the power stroke in the engine is to force the combustion chamber to expand. Sparks occurring after top dead center (ATDC) are usually counter-productive (producing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Market Timing
Market timing is the strategy of making buying or selling decisions of financial assets (often stocks) by attempting to predict future market price movements. The prediction may be based on an outlook of market or economic conditions resulting from technical or fundamental analysis. This is an investment strategy based on the outlook for an aggregate market rather than for a particular financial asset. The efficient-market hypothesis is an assumption that asset prices reflect all available information, meaning that it is theoretically impossible to systematically "beat the market." Approaches Market timing can cause poor performance. After fees, the average "trend follower" does not show skills or abilities compared to benchmarks. "Trend Tracker" reported returns are distorted by survivor bias, selection bias, and fill bias. At the Federal Reserve Bank of St. Louis, YiLi Chien, Senior Economist wrote about return-chasing behavior. The average equity mutual fund investor tends to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Memory Timings
Memory timings or RAM timings describe the timing information of a memory module. Due to the inherent qualities of VLSI and microelectronics, memory chips require time to fully execute commands. Executing commands too quickly will result in data corruption and results in system instability. With appropriate time between commands, memory modules/chips can be given the opportunity to fully switch transistors, charge capacitors and correctly signal back information to the memory controller. Because system performance depends on how fast memory can be used, this timing directly affects the performance of the system. The timing of modern synchronous dynamic random-access memory (SDRAM) is commonly indicated using four parameters: CL, TRCD, TRP, and TRAS in units of clock cycles; they are commonly written as four numbers separated with hyphens, ''e.g.'' 7-8-8-24. The fourth (tRAS) is often omitted, or a fifth, the Command rate, sometimes added (normally 2T or 1T, also written 2N, 1N). Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
