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Ultra high frequency ultrasound enables real-time visualization of blood supply from chorioallantoic membrane to human autosomal dominant polycystic kidney tissue. [PDF]
Sci RepSchueler J +15 more
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Ultra-High-Frequency Electrocardiography
2021 Computing in Cardiology (CinC), 2021Background: We introduce a new technology that uses the ultra-high-frequency components (150-1000 Hz) of the electrocardiogram (UHF-ECG).Method: The UHF-ECG components represent weak signals generated by the depolarization of myocardial cells. The amplitude of UHF oscillations decreases with distance from the source.
Jurak, P. +11 more
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Ultrasound Features of Onychopapilloma at High‐Frequency and Ultra‐High Frequency
Journal of Ultrasound in Medicine, 2023ObjectiveThis study aimed to identify the sonographic features of pathologically confirmed onychopapilloma cases.MethodsHigh‐frequency up to 24 MHz and ultra‐high frequency‐ultrasound up to 71 MHz examinations were performed and correlated with their clinical and pathologic presentations.ResultsTwenty‐two cases met the criteria.
Sechi A. +3 more
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Journal of the Institution of Electrical Engineers - Part IIIA: Radiolocation, 1946
An account is given of measurements which have been made of the variation of attenuation with frequency in a number of concentric-line filters. It is shown that the results are in rough agreement with formulae derived from transmission-line theory, though discrepancies arising from end-effects are by no means negligible.
C.W. Oatley, C.M. Burrell
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An account is given of measurements which have been made of the variation of attenuation with frequency in a number of concentric-line filters. It is shown that the results are in rough agreement with formulae derived from transmission-line theory, though discrepancies arising from end-effects are by no means negligible.
C.W. Oatley, C.M. Burrell
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Ultra-high frequency drift waves
Plasma Physics, 1972A dispersion relation is produced for ultra high frequency drift waves arising from an electron stream drifting through a density gradient in a plasma. Plasma stability is discussed.
E Detyna, E R Wooding
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Ultra High Frequency Riplon Spectroscopy
Japanese Journal of Applied Physics, 2004Light scattering study of ripplon (surface tension waves of thermal origin) was made at a high frequency range of more than 10 MHz on pure water surface. The observed power spectra were in very good agreement with the theoretical curves strictly derived from the fluctuation dissipation theory.
Keiji Sakai +2 more
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Ultra-High Frequency Beam Analyzer
Review of Scientific Instruments, 1954This paper describes a method for presenting on a fluorescent screen the time varying velocity and density modulation of an electron beam, modulated at a frequency of 3000 Mc, as it emerges from the cavities of a klystron, the wave guide in a traveling wave tube, or similar structures.
L. R. Bloom, H. M. VonFoerster
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Ultra high frequency financial data
Proceedings of the 10th annual conference companion on Genetic and evolutionary computation, 2008This note is best described as a 'Research Challenge', and concerns building an ultra high frequency (UHF) trading system. The emphasis is on addressing the problems posed by UHF data, with a few thoughts on strategy and implementation. The problem may be amenable to evolutionary computation.
Martin Victor Sewell, Wei Yan
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