Results 261 to 270 of about 105,168 (294)

Calibration and standardization of the emission light path of confocal microscopes

Journal of Microscopy, 2006
SummaryRecently, there has been a large expansion in the usage of optical microscopes for obtaining quantitative information from biological samples in order to determine fundamental biological information such as molecular kinetics and interaction, and heterogeneity within cell populations.
E H, Cho, S J, Lockett
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Assessment of MODIS Thermal Emissive Band On-Orbit Calibration

IEEE Transactions on Geoscience and Remote Sensing, 2011
Sixteen Moderate Resolution Imaging Spectroradiometer thermal emissive bands (TEBs) cover the wavelength from 3.75 to 14.24 μm. TEB calibration uses data collected from the detector responses to the onboard blackbody (BB) and space view. The BB was designed to operate either at a constant temperature for detector linear gain calibration or at ...
Tiejun Chang, Xiaoxiong Xiong
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Absolute Calibration of Acoustic Emission Transducers

Japanese Journal of Applied Physics, 1982
Some of the previous research on AE transducer calibration was reviewed briefly, and a few important problems in the calibration which seemed to have been overlooked were discussed. A novel system which employed a large hammeredsteel block as the sound medium for precise calibration was outlined.
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Objective Calibration of Bone Conductors Using Otoacoustic Emissions

Ear and Hearing, 1999
To demonstrate a technique for objectively calibrating bone conductors on an individual basis using distortion product otoacoustic emissions (DPOAEs).Individual calibrations were obtained using DPOAEs recorded from a single ear of 21 normally hearing adults.
D, Purcell, H, Kunov, W, Cleghorn
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Reciprocity calibration of impulse responses of acoustic emission transducers

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1998
By means of reciprocity calibration in Rayleigh-wave and longitudinal-wave sound fields, frequency characteristics of amplitude and phase of absolute sensitivity of acoustic emission transducers were measured on the basis of the newly derived complex reciprocity parameters, and the impulse responses were obtained through inverse Fourier transform ...
H, Hatano, T, Chaya, S, Watanabe, K, Jinbo   +3 more
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Design of a self-calibrating simulated acoustic emission source

Ultrasonics, 2000
The use of conical piezoelectric transducers as point acoustic sources has been investigated. It has been shown that transducers based on a design originally developed at the National Institute for Standards and Technology in the USA can be used as point transmitters over the frequency range of interest in acoustic emission measurements (100 kHz to ...
M J, Evans, J R, Webster, P, Cawley
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Reproduction of emissive power (self-calibration) using an emissive diode

Measurement Techniques, 1996
A new method of self-calibration of the emissive power of an emissive diode is presented. The method involves determining the overall volume of the thermal and emissive power released in a semiconductor-type radiating structure in the non-steady-state mode. According to a preliminary analysis, the method possesses high metrological characteristics.
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Faraday Cup and Secondary-Emission Monitor Calibration

IEEE Transactions on Nuclear Science, 1967
Two small Faraday cups, one shielded and one unshielded, have been built and calibrated for efficiency vs electron energy. Measurements with a pulse beam transformer gave the absolute efficiency by means of a unique method: direct measurement of the ratio of the "lost" current to the incident beam current. Efficiencies for the unshielded cup are in the
T. F. Godlove, M. E. Toms, D. W. Jones, K. M. Murray   +3 more
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A calibration approach to acoustic emission energy measurement

Journal of Nondestructive Evaluation, 1991
An approximate method for the quantitative characterization of acoustic emission sources whose signals are recorded with traditional instrumentation has been developed to evaluate the emission from a Fe-Ni alloy undergoing martensitic transformations. The calibration principle is based upon using pseudo sources of known elastic strain energy to produce
Y. Berlinsky, M. Rosen, J. Simmons, H. N. G. Wadley   +3 more
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Emissive chart for imager calibration

Color and Imaging Conference, 2004
Jeffrey M. DiCarlo, Eric Montgomery, Steven W. Trovinger   +2 more
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