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MICROSECOND [10 records]

Record 1 2024-10-24

English

Subject field(s)
  • Scientific Research Equipment
  • Biological Sciences
CONT

Microelectrode arrays(MEA)... contain a grid of tightly spaced electrodes embedded in the culture surface of the well. Electrically active cells, such as neurons, are plated and cultured over the electrodes. When neurons fire action potentials, the electrodes measure the extracellular voltage on a microsecond timescale.

French

Domaine(s)
  • Matériel et équipement (Recherche scientifique)
  • Sciences biologiques

Spanish

Save record 1

Record 2 2024-02-21

English

Subject field(s)
  • Lasers and Masers
CONT

Among the various laser parameters, laser pulse width is a crucial factor to be selected carefully, depending on the application.... Microsecond laser pulses have been widely applied for various medical treatments. Nd : YAG laser pulses with a width of microseconds and 1064 nm [nanometer] wavelength are useful for treating keloid, hypertrophic, or surgical scars.

CONT

The effects of the laser pulse width (i.e., laser intensity) on the ion properties produced after laser-particle interaction were also examined.

French

Domaine(s)
  • Masers et lasers
CONT

Des tests de simulation sur des missiles démontreront à quel point la largeur de l'impulsion laser peut avoir un effet critique sur l'efficacité de la contre-mesure.

Spanish

Save record 2

Record 3 2011-08-05

English

Subject field(s)
  • Metrology and Units of Measure
DEF

SI prefix, one-millionth : A microsecond is one-millionth of a second. Symbol :μ

OBS

The symbol for "micro-" is a lower case Greek letter "mu". Capital "mu" cannot be used because it is identical to the Roman "M" which has another meaning.

French

Domaine(s)
  • Unités de mesure et métrologie
DEF

Préf. (symb. : μ) qui, placé devant une unité la divise par un million [...]

OBS

Le symbole de «micro-» ou «micr-» est la lettre grecque μ minuscule.

Spanish

Save record 3

Record 4 2010-09-10

English

Subject field(s)
  • Physics
  • Remote Sensing
CONT

One hertz equals one cycle per second. Another measure of frequency is the period of a wave. It is the length of time it takes for the wave to complete one cycle. Period is obtained by dividing one second by the number of cycles per second(frequency). For example : if the frequency is 1Mhz(one million cycles per second), the period will be one-millionth of a second(1 microsecond).

OBS

[Electromagnetic] waves can be described using a number of standard variables including: frequency, wavelength, amplitude and period.

OBS

period: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).

French

Domaine(s)
  • Physique
  • Télédétection
DEF

Temps pendant lequel l'onde effectue une oscillation complète [secondes].

OBS

Le rayonnement électromagnétique se caractérise par une période, une fréquence, une vitesse de propagation, une longueur d'onde et une amplitude.

OBS

[La période est l'] inverse de la fréquence.

OBS

période : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).

Spanish

Save record 4

Record 5 2004-08-03

English

Subject field(s)
  • Lighting
  • Photography
DEF

A shutter used in high-speed photography for exposures of about 1 microsecond.

OBS

Dense flint glass in a magnetic coil is placed between cross polarisers. The magnetic field produced by discharging a capacitator through the coil rotates the plane of polarisation of the light entering the glass so that it can pass through the second polariser.

French

Domaine(s)
  • Éclairage
  • Photographie
DEF

Obturateur muni d'un système comportant une bobine à laquelle est appliquée une impulsion magnétique produisant un temps de passage extrèmement rapide d'un faisceau lumineux.

Spanish

Save record 5

Record 6 2002-02-15

English

Subject field(s)
  • Audio Technology
  • Computer Hardware
DEF

The maximum rate at which the output voltage of an operational amplifier changes for a squarewave or step-signal input. The rate is usually specified in volts per microsecond.

French

Domaine(s)
  • Électroacoustique
  • Matériel informatique
DEF

Cette mesure qui est proche de celle du temps de montée, s'exprime en volts par micro-seconde. Plus le nombre est grand, meilleure est la performance (à la différence du temps de montée).

Key term(s)
  • vitesse de variation

Spanish

Campo(s) temático(s)
  • Electroacústica
  • Equipo físico de computadora (Hardware)
DEF

Rapidez con que cambia la tensión de salida en función de la tensión de entrada.

Save record 6

Record 7 1999-02-25

English

Subject field(s)
  • Photography
  • Lamps
CONT

Electronic flash tubes are made in many sizes and forms, such as straight, U, or spiral shapes, as required for different applications. The gas pressure and electrode spacing are arranged so that the tube will not flash by itself in most applications. But when a triggering pulse is applied to an external electrode, internal ionization results, and the tube flashes. Most of the flash tubes used today are filled with Xenon gas at a pressure of a fraction of an atmosphere. A series of 1 microsecond exposures of the arc in a typical tube made with a magneto-optic shutter shows that the arc starts as a narrow filament adjacent to the flash-tube wall on the side of the external triggering electrode. Soon, if the energy is sufficiently large, the arc filament enlarges to fill the entire flash tube.

French

Domaine(s)
  • Photographie
  • Lampes
DEF

Tube renfermant un gaz inerte et comportant deux électrodes aux extrémités. Une décharge électrique sur ces électrodes provenant d'un condensateur provoque un éclair bref et d'une grande intensité.

Key term(s)
  • lampe éclair à décharge

Spanish

Save record 7

Record 8 1993-08-26

English

Subject field(s)
  • Chemistry
DEF

A method of studying fast photochemical reactions in gas molecules; a powerful lamp is discharged in microsecond flashes near a reaction vessel holding the gas, and the products formed by the flash are observed spectroscopically.

French

Domaine(s)
  • Chimie
DEF

Photolyse obtenue à l'aide d'un intense éclair lumineux ayant pour effet de briser des molécules, ioniser des atomes, engendrer des radicaux libres, les espèces chimiques ainsi produites provoquant des réactions de relaxation en cascade.

Spanish

Save record 8

Record 9 1987-12-23

English

Subject field(s)
  • Guns (Land Forces)
CONT

In the delay mode, detonation occurs several tenths of a microsecond after impact with a solid target.

French

Domaine(s)
  • Canons (Forces terrestres)
CONT

En mode retardé, un capteur d'écrasement permet le déclenchement de l'explosion quelques dizaines de microsecondes après l'impact sur une cible dure.

Spanish

Save record 9

Record 10 1983-08-09

English

Subject field(s)
  • Air Transport
CONT

Desensitization. Upon receipt of any pulse more than 0. 7 microsecond in duration, the receiver shall be desensitized by an amount that is within at least 9 dB of the amplitude of the desensitizing pulse(...)

Key term(s)
  • desensitising pulse

French

Domaine(s)
  • Transport aérien
CONT

Désensibilisation. Sur réception d'une impulsion de durée supérieure à 0,7 microseconde, le récepteur sera soumis à une désensibilisation dont l'importance se situe à 9 dB au moins de l'amplitude de l'impulsion de désensibilisation (...)

Spanish

Save record 10

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