Results 211 to 220 of about 216,626 (261)

The influence of variability on mismatch negativity amplitude

Biological Psychology, 2021
Mismatch Negativity (MMN) to pattern deviations reveals exquisite pattern detection ability in the brain. MMN amplitude is proposed to be precision-weighted, being inversely proportional to variability within a patterned sound sequence. Two experiments were conducted to determine whether pattern variability, shown to influence MMN to simple pattern ...
Mattsen Yeark, Bryan Paton, Juanita Todd
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Seasonality in the Amplitude of Decadal Variability

Journal of Applied Meteorology and Climatology, 2023
Abstract As the understanding of decadal variability in climate systems deepens, there is a growing interest in investigating the decadal variability of seasonal-mean or monthly mean variables. This study aims to understand the seasonality observed in the amplitude of decadal variability.
Fei Zheng, Jianping Li, Hao Wang, Yuxun Li, Xiaoning Liu, Rui Wang   +5 more
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On the Pulsation Amplitude of Cepheid Variables

Astrophysics and Space Science, 1972
On the basis of more abundant data a relation logPΔV/logΔR for cepheid variables (Fernie, 1965) is constructed. A linear relation between logP ΔV and logΔR for classical cepheids is found, which perhaps has a break at ΔR=10R ⊙. On the logΔR/logP diagram thes-cepheids (Efremov, 1968) show a distinct sequence.
N. Nikolov, Ts. Tsvetkov
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QRS Amplitude and Shape Variability in Magnetocardiograms

Pacing and Clinical Electrophysiology, 2000
In magnetocardiography, averaging of QRS complexes is often used to improve the signal‐to‐noise ratio. However, averaging of QRS complexes ignores the variation in amplitude and shape of the signals caused, for example, by respiration. This may lead to suppression of signal portions within the QRS complexes.
M, Huck, J, Haueisen, O, Hoenecke, T, Fritschi, U, Leder, H, Nowak   +5 more
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Variable Amplitude Fatigue

2013
Fatigue crack growth behavior of selected aluminum alloys under variable amplitude loading is discussed in this study, based principally on experimental observations. The tests include single overloads tests in different environments, block load tests and tests using an aircraft wing loading spectrum.
Narayanaswami Ranganathan, Damien Joly, René Leroy   +2 more
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Relation of Alpha Frequency to Amplitude Variability

Perceptual and Motor Skills, 1968
Kleitman (4) has suggested that the frequency of the alpha EEG partern is related to level of consciousness. He presented studies which showed a decrease in alpha frequency during sensory isolation, an increase in alpha frequency in hyperthermia, a decrease in alpha frequency associated with hypothyroidism, and an association of alpha frequency and ...
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Amplitude variability of the transient visual evoked response

Ophthalmic and Physiological Optics, 1988
The amplitude repeatability of pattern reversal visual evoked response using a 5.5 and 40′ arc check was investigated in twelve subjects with each subject recording ten 64 sweep runs. The variability by visual inspection or by analysis of variance suggests that a single run will provide a representative amplitude for a 40′ are check whereas the 5.5 ...
W A, Douthwaite, T C, Jenkins
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Mirror with reflectance variable in amplitude and phase. 1. Modelling of a mirror with reflectance variable in amplitude and phase

Quantum Electronics, 2010
An operator model of a mirror as a reflector with a reflectance variable over the aperture is developed on the basis of a Fabry—Perot interferometer. The main characteristics of the interferometer (mirror) are studied in the geometric, diffraction, and modal approximations.
V V Kiiko, V I Kislov, Evgenii N Ofitserov   +2 more
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Amplitude–shape approximation as an extension of separation of variables

Mathematical Methods in the Applied Sciences, 2007
AbstractSeparation of variables is a well‐known technique for solving differential equations. However, it is seldom used in practical applications since it is impossible to carry out a separation of variables in most cases. In this paper, we propose the amplitude–shape approximation (ASA) which may be considered as an extension of the separation of ...
Parumasur, N., Singh, P., Singh, V. S.
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Variable amplitude vibratory apparatus

The Journal of the Acoustical Society of America, 1983
A vibratory apparatus comprises a shaft mounted for rotation about an axis and having weight structure mounted thereon to effect vibration in response to shaft rotation. The shaft may be initially balanced or unbalanced. According to a first series of embodiments, secondary movable weight structure is mounted on the shaft for outward movement against ...
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