Results 181 to 190 of about 34,081 (232)
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Development of absolute accelerometry
Astrophysics and Space Science, 1994Absolute accelerometry is a technique for detecting small radial velocity changes involving lasers. The final output is a beat frequency similar to that from a Doppler radar. A progress report is presented on the development which began three years ago.
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Absolute astronomical accelerometry
Astrophysics and Space Science, 1984AbstractA new technique is proposed, leading to two closely related instruments, the solar and stellar accelerometers. The principal fields of application are solar/stellar seismology and the search for extrasolar planets. The technique is fully specific: it cannot give the velocities themselves.
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SAGE: An Italian Project of Satellite Accelerometry
2000SAGE is a project for a satellite accelerometric mission aimed at deterniining with high precision the low-medium coefficients of the earth gravity field and their time variations.
SANSO', FERNANDO +9 more
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2000
One of the key instruments aboard the CHAMP geoscientific small satellite is the three-axes STAR accelerometer, which shall measure the resultant acceleration of the spacecraft due to non-gravitational forces. Then, the purely gravitational signal in CHAMP’s orbit, measured with GPS satellite-to-satellite tracking, can be extracted for use in Earth ...
Schwintzer, P., Kang, Z., Perosanz, F.
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One of the key instruments aboard the CHAMP geoscientific small satellite is the three-axes STAR accelerometer, which shall measure the resultant acceleration of the spacecraft due to non-gravitational forces. Then, the purely gravitational signal in CHAMP’s orbit, measured with GPS satellite-to-satellite tracking, can be extracted for use in Earth ...
Schwintzer, P., Kang, Z., Perosanz, F.
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Membrane-based optomechanical accelerometry
Conference on Lasers and Electro-Optics, 2021Optomechanical accelerometers promise quantum-limited readout, high band- width, self-calibration, and radiation-pressure stabilization. We present a simple, scalable platform that enables these benefits with sub-µg sensitivity and 10 kHz bandwidth, based on a pair of vertically integrated SiN membranes.
Aman R. Agrawal +3 more
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Analysis of the equine jumping technique by accelerometry
Equine Veterinary Journal, 1997Summary The purpose of this study was to demonstrate the relationships between jumping technique and dorsoventral acceleration measured at the sternum. Eight saddle horses of various jumping abilities competed on a selective experimental show jumping course including 14 obstacles.
Barrey, Eric, Galloux, P.
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The reliability of accelerometry to measure weightlifting performance
Sports Biomechanics, 2012The purposes of the study were to track weightlifters' barbell acceleration with a portable accelerometer over three training sessions to examine test-retest reliability and to compare peak barbell acceleration at different training intensities. Twelve nationally ranked weightlifters volunteered for this study.
Sato, Kimitake +2 more
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An automated accelerometry system for gait analysis
Journal of Biomechanics, 1977Abstract An automated system for assessing gait as a motor function is described. The system is composed of electronic footswitch devices, a triaxial accelerometer, and amplifier-power supply interface integrated with a PDP-12 computer. Data acquisition, data analysis, and validation procedures are discussed.
G L, Smidt +3 more
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Detection of Concussion Using Cranial Accelerometry
Clinical Journal of Sport Medicine, 2015To determine whether skull motion produced by pulsatile cerebral blood flow, as measured by cranial accelerometry, is altered during concussion.In phase 1, to identify a specific pattern indicative of concussion, cranial accelerometry of subjects who sustained a concussion underwent analysis of waveforms, which was compared with accelerometry from ...
Paul S, Auerbach +5 more
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Physical activity estimation from accelerometry
2019 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2019Objective physical activity (PA) quantification is traditionally achieved using lightweight accelerometers accounting for activity frequency, intensity and duration. The accelerometer data are usually converted into activity counts and these counts can be used on their own to quantify the intensity and duration of a PA period or they can serve as ...
Garnotel, Maël, C, Simon,, Bonnet, S.
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