Results 321 to 330 of about 2,627,966 (379)
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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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High-Frequency and Ultra-High Frequency Ultrasound: Musculoskeletal Imaging up to 70 MHz
Seminars in Musculoskeletal Radiology, 2020Musculoskeletal (MSK) ultrasound has well-established advantages, able to investigate very small structures with high resolution and a quick and real-time dynamic evaluation with the possibility of contralateral comparison.
D. Albano +4 more
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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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The Application of Ultra-High-Frequency Ultrasound in Dermatology and Wound Management
International Journal of Lower Extremity Wounds, 2020The management of lower extremity wounds is frequently performed by means of clinical examination, representing a challenge for the clinician due to the various conditions that can potentially enter differential diagnosis.
R. Izzetti +5 more
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IEEE transactions on consumer electronics, 2020
Healthcare systems have been an important part of the research on consumer electronics in recent years. To be a mass-market product, a healthcare system is combined with a home control system.
Shuenn-Yuh Lee +2 more
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Healthcare systems have been an important part of the research on consumer electronics in recent years. To be a mass-market product, a healthcare system is combined with a home control system.
Shuenn-Yuh Lee +2 more
semanticscholar +1 more source
Ultra-High-Frequency Oscillography
Proceedings of the IRE, 1940Starting from the transit-time effects of the first and second kind, occurring in a cathode-ray tube, two methods are described for the oscillographic examination of ultra-high-frequency oscillations. First, we have the inversion spectrograph which supplies, by means of a white and spectrally dispersed electron beam, sinusoidal and complex inversion ...
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Fact or friction: Jumps at ultra high frequency
Journal of Financial Economics, 2011In this paper, we demonstrate that jumps in financial asset prices are not nearly as common as generally thought, and that they account for only a very small proportion of total return variation. We base our investigation on an extensive set of ultra high-frequency equity and foreign exchange rate data recorded at milli-second precision, allowing us to
Christensen, K. +2 more
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Intraoral Ultra‐High Frequency Ultrasound study of oral lichen planus: A pictorial review
Skin research and technology, 2020Ultra‐High Frequency Ultrasound (UHFUS) is a recently introduced diagnostic technique involving the use of higher frequencies compared to conventional ultrasound. Among the several fields of application, intraoral usage of UHFUS appears still limited. We
R. Izzetti +6 more
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Ultra high frequency-Radio Frequency Identification Tags modeling
2009 International Conference on Advances in Computational Tools for Engineering Applications, 2009Radio Frequency Identification systems are proposed for various applications such as warehouse inventories and supply chain management. A typical RFID system includes two parts: the Reader and the Tags. This paper is concerned with Tag simulation. Tags are components that are physically placed upon each item and consist of an antenna and a chip.
S. A. Chakra +3 more
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A Power Amplifier for Ultra-High Frequencies
Proceedings of the IRE, 1936A consideration of the special problems encountered at ultra-high frequencies has led to the design of a push-pull power pentode, useful as an amplifier, frequency multiplier, and modulator at frequencies of 300 megacycles per second and below. Unusual construction features include the mounting of two pentodes in the same envelope with interconnected ...
A. L. Samuel, N. E. Sowers
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