関: microsec

WordNet

one millionth (10^-6) of a second; one thousandth of a millisecond

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マイクロ秒(1秒の100万分の1)

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/12/22 12:40:00」(JST)

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This animation illustrates the generation of the debris and ejecta clouds after a spherical aluminum projectile impacts a thin aluminum plate at approximately 7 km/s. The frame interval is about 1 microsecond.

A microsecond is an SI unit of time equal to one millionth (0.000001 or 10⁻⁶ or ¹/_1,000,000) of a second. Its symbol is μs. One microsecond is to one second as one second is to 11.574 days.

A microsecond is equal to 1000 nanoseconds or ¹/_1,000 milliseconds. Because the next SI prefix is 1000 times larger, measurements of 10⁻⁵ and 10⁻⁴ seconds are typically expressed as tens or hundreds of microseconds. A microsecond of sound signal sample (44.1 kHz, 2 channel, 24 bit, WAV) is typically stored on 4 µm of CD, 2 bits per µs per 4 µm.

Examples

1 microsecond (1 μs) – cycle time for frequency 1×10⁶ hertz (1 MHz), the inverse unit. This corresponds to radio wavelength 300 m (AM mediumwave band), as can be calculated by multiplying 1 µs by the speed of light (approximately 300×10⁶ m/s) to determine the distance travelled.
1 microsecond – the length of time of a high-speed, commercial strobe light flash (see air-gap flash).
1.8 microseconds – the amount of time subtracted from the Earth's day as a result of the 2011 Japanese earthquake.
2 microseconds – the lifetime of a muonium particle
2.68 microseconds – the amount of time subtracted from the Earth's day as a result of the 2004 Indian Ocean earthquake.^[1]
3.33564095 microseconds – the time taken by light to travel one kilometer in a vacuum
4.63 microseconds – a fifth (a 60th of a 60th of a 60th of a second)
5.4 microseconds – the time taken by light to travel one mile in a vacuum
10 microseconds (μs) – cycle time for frequency 100 kHz, radio wavelength 3 km
17 microseconds: net amount per year that the length of the day lengthens, largely due to tidal acceleration.^{[citation needed]}
20.8 microseconds – sampling interval for digital audio with 48000 samples/s
22.7 microseconds – sampling interval for CD audio (44100 samples/s)
38 microseconds – discrepancy in GPS satellite time per day (compensated by clock speed) due to relativity^[2]
50 microseconds – cycle time for highest human-audible tone (20 kHz)
50 microseconds to read – the access latency for a modern Solid State Drive which holds non-volatile computer data^[3]
100 microseconds (0.1 ms) – cycle time for frequency 10 kHz
125 microseconds – sampling interval for telephone audio (8000 samples/s)
164 microseconds - half-life of polonium-214
240 microseconds – half-life of copernicium-277
250 microseconds – cycle time for highest tone in telephone audio (4 kHz)^{[citation needed]}
277.8 microseconds – a fourth (a 60th of a 60th of a second), used in astronomical calculations by al-Biruni and Roger Bacon in 1000 and 1267 AD, respectively.^[4]^[5]
489.67 microseconds - time for light at a 1550nm frequency to travel 100 km in a singlemode fiber optic cable (where speed of light is approximately 200 million meters per second due to internal reflectance).

For reference

The average human eye blink takes 350,000 microseconds (just over 1/3 of one second).
The average human finger click takes 150,000 microseconds (just over 1/7 of one second).
A camera flash illuminates for 1000 microseconds.
Standard camera shutter speed opens the shutter for 4000 microseconds or 4 milliseconds.

References

^ Buis, Alan (January 10, 2005). "NASA Details Earthquake Effects on the Earth". NASA. Retrieved June 29, 2011.
^ Richard Pogge. "GPS and Relativity". Retrieved 2011-10-01.
^ Intel Solid State Drive Product Specification
^ al-Biruni (1879). The chronology of ancient nations: an English version of the Arabic text of the Athâr-ul-Bâkiya of Albîrûnî, or "Vestiges of the Past". translated by Sachau C Edward. W.H. Allen. pp. 147–149. OCLC 9986841.
^ R Bacon (2000) [1928]. The Opus Majus of Roger Bacon. translator: BR Belle. University of Pennsylvania Press. table facing page 231. ISBN 978-1-85506-856-8.

External links

The National Institute of Standards and Technology (NIST)

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English Journal

Approaches for ultrafast imaging of transient materials processes in the transmission electron microscope.

Lagrange T, Reed BW, Santala MK, McKeown JT, Kulovits A, Wiezorek JM, Nikolova L, Rosei F, Siwick BJ, Campbell GH.SourceCondensed Matter and Materials Division, Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550, USA.
Micron (Oxford, England : 1993).Micron.2012 Nov;43(11):1108-20. Epub 2012 Apr 28.
The growing field of ultrafast materials science, aimed at exploring short-lived transient processes in materials on the microsecond to femtosecond timescales, has spawned the development of time-resolved, in situ techniques in electron microscopy capable of capturing these events. This article give
PMID 22595460

Time-gated luminescence microscopy with responsive nonmetal probes for mapping activity of protein kinases in living cells.

Vaasa A, Ligi K, Mohandessi S, Enkvist E, Uri A, Miller LW.SourceInstitute of Chemistry, University of Tartu, 14A Ravila St., 50411 Tartu, Estonia. asko.uri@ut.ee.
Chemical communications (Cambridge, England).Chem Commun (Camb).2012 Sep 4;48(68):8595-7. Epub 2012 Jul 20.
A photoluminescence probe ARC-1185, possessing both high affinity towards basophilic protein kinases (PKs) and microsecond-scale luminescence lifetime when associated with a kinase, was used for the mapping of ARC-1185-PK complexes in living cells with time-gated luminescence microscopy.
PMID 22822483

Japanese Journal

Revealing the peptide presenting process of human leukocyte antigen through the analysis of fluctuation

, , ,
BIOPHYSICS 11(0), 103-106, 2015
… Structural fluctuation on microsecond to millisecond time scales has been reported to play an important role in proteins that undergo significant structural change during their expression of function. …
NAID 130005065482