Results 251 to 260 of about 765,097 (272)
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MULTI-FREQUENCY ICE DETECTION SYSTEM
Sensors and Microsystems, 2008This paper presents the design and performance evaluation of a new sensor system for detecting the presence of water or ice films on its surface. The system is based on a multifrequency capacitive measurement and the effect that water and ice have different dielectric constants.
PASERO, Eros Gian Alessandro +2 more
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2001
Abstract Both EPR and nuclear frequency spectra are most easily interpreted in the high-field limit where the electron or nuclear Zeeman interaction are the dominating interactions in the relevant spin Hamiltonian. On the other hand some pulse EPR experiments such as nuclear modulation techniques can only be applied if field-independent ...
Arthur Schweiger, Gunnar Jeschke
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Abstract Both EPR and nuclear frequency spectra are most easily interpreted in the high-field limit where the electron or nuclear Zeeman interaction are the dominating interactions in the relevant spin Hamiltonian. On the other hand some pulse EPR experiments such as nuclear modulation techniques can only be applied if field-independent ...
Arthur Schweiger, Gunnar Jeschke
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Multi-frequency transmission tomography
The Journal of the Acoustical Society of America, 1983Multi-frequency signals were transmitted using a plane-wave transducer, through a water immersed phantom consisting of two finger cots, one containing 50% isopropanol alcohol and the other containing normal saline. The scattered ultrasound was received with a small hydrophone and detected with a quadrature detection system.
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Systematic errors in multi-frequency EIT
Physiological Measurement, 2000Systematic errors have been measured with a multi-frequency data-collection system operating between 10.24 and 81.92 kHz. The errors were present even though a conventional background measurement on a uniform saline phantom had already been subtracted.
J, Schlappa, E, Annese, H, Griffiths
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Bioelectrical spectroscopy from multi-frequency EIT
Physiological Measurement, 1994A method is described by which bioelectrical spectroscopy could be combined with multi-frequency electrical impedance tomography (EIT) enabling a Cole-Cole plot to be drawn for any selected pixel in the image for tissue characterization. To demonstrate the principles of the method, multi-frequency EIT measurements were simulated with a numerical model.
H, Griffiths, J, Jossinet
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Hybrid Observer for multi-frequency signals
IFAC Proceedings Volumes, 2010Abstract We proposed a hybrid observer to estimate the frequencies of a signal even in the presence of saturation. Semi-global exponential convergence of the estimation error is provided, and the problem of retrieve dynamically the angular frequencies is addressed.
CARNEVALE, DANIELE +2 more
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Multi-frequency piezoelectric energy harvester
The Journal of the Acoustical Society of America, 2005An energy harvesting device is provided. The energy harvesting device includes structural members covered with piezoelectric material resonating at different primary frequencies. As the structure to which the energy harvesting device is secured vibrates over a range of frequencies, more than one member resonates or is close to resonance.
Matthew C. Malkin, Christopher L. Davis
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A multi-frequency quadrature bridge
1998 Conference on Precision Electromagnetic Measurements Digest (Cat. No.98CH36254), 2002A quadrature bridge has been developed with the aim of determining capacitance values at several frequencies in terms of a resistance ultimately derived from the QHR. The bridge is evaluated by comparing a 1 nF capacitor with a 100 k/spl Omega/ resistor at six frequencies from 3/8/spl times/10/2/spl pi/ kHz to 10/2/spl pi/ kHz.
Y. Nakamura +4 more
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Multi-frequency ESR in EuFe2As2
Journal of the Korean Physical Society, 2013We have performed multi-frequency electron spin resonance (ESR) measurements on EuFe2As2, which is one of the parent compounds of Fe-based superconductors. At T SDW=190 K, this compound shows a spin-density-wave (SDW) transition.
Masami Ikeda +5 more
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THz Multi-frequency resonance filter
2008 33rd International Conference on Infrared, Millimeter and Terahertz Waves, 2008The transmission characteristic of a two-dimensional array of rectangular holes was examined theoretically and experimentally in the THz frequency range. The structure under consideration was found to act as a multi-frequency resonance filter whose frequency response of transmission depends on the periodicities and filling material of the structure.
J. K. So +6 more
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