Results 211 to 220 of about 3,991,458 (252)
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Oscillatory behavior in enzymatic control processes
Advances in Enzyme Regulation, 1965Abstract The demonstration in recent years of negative feedback control processes operating at the molecular level in cells leads naturally to a study of their dynamic properties. Since such control mechanisms are known to have an intrinsic tendency to oscillate, and since rhythmic processes constitute a prominent dynamic feature of plant and animal ...
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Oscillatory Behavior of Ventilation in Resting Man
IEEE Transactions on Biomedical Engineering, 1964Section I discusses the results of analyses conducted on time records of ventilation, for periods up to five hours, for young adult male subjects in a conscious minimal power state. The results imply the following: 1) Temporal patterns of ventilation are characterized by the superposition of a denumerable set of almost periodic sustained oscillations ...
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Analyzing Oscillatory Behavior with Formal Methods
2014An important behavioral pattern that can be witnessed in many systems is periodic re-occurrence. For example, most living organisms that we know are governed by a 24 hours rhythm that determines whether they are awake or not. On a larger scale, also whole population numbers of organisms fluctuate in a cyclic manner as in predator-prey relationships ...
Alexandr Andreychenko +2 more
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Oscillatory Behavior of Graphene Nanoflake on Graphene Nanoribbon
Journal of Nanoscience and Nanotechnology, 2015We investigated the oscillatory behaviors of graphene-nanoflake on graphene-nanoribbon via classical molecular dynamics simulations. Since the potential well had constant depth along the length axis of the graphene-nanoribbon, such as a ditch, and the retraction van der Waals forces at both edges were exerted, the movable graphene-nanoflake could be ...
Jeong Won, Kang, Kang Whan, Lee
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Oscillatory behavior of the sympathetic system induced by picrotoxin
Canadian Journal of Physiology and Pharmacology, 1969In cats anesthetized with sodium pentobarbital, paralyzed with gallamine, atropinized, and artificially ventilated, an intravenous injection of picrotoxin (dose between 2 and 5 mg/kg) consistently induced sustained oscillations of arterial blood pressure (BP).
C, Polosa +4 more
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The effects of oscillatory temperature on HaCaT keratinocyte behaviors
Clinical Hemorheology and Microcirculation, 2020BACKGROUND: Keratinocytes are exposed to a thermal gradient throughout epidermal layers in human skin depending on environmental temperatures. OBJECTIVE: Here, the effect of cyclic temperature changes (ΔT) on HaCaT cell behaviors was explored. METHODS: HaCaT cells were cultured at constant temperature (37 °C or 25 °C) or under ΔT conditions.
Ma, Nan +4 more
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Oscillations and oscillatory behavior in small neural circuits
Biological Cybernetics, 2006In order to determine the dynamical properties of central pattern generators (CPGs), we have examined the lobster stomatogastric ganglion using the tools of nonlinear dynamics. The lobster pyloric and gastric mill central pattern generators can be analyzed at both the cellular and network levels because they are small, i.e., contain only 25 neurons ...
Allen I. Selverston, Joseph Ayers
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Preventing oscillatory behavior in error control for ODEs
Computers & Chemical Engineering, 2008The cause of erroneous oscillatory behavior when solving systems of ordinary differential equations with state-of-the-art software has been investigated. It is demonstrated that a common cause of this oscillatory behavior is the cyclic variation of the local truncation error and the step size when explicit integration algorithms with adaptive step size
Mordechai Shacham, Neima Brauner
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Oscillatory Behavior of Rare-gas Atoms in SWCNT
The Journal of Physical Chemistry B, 2006In this paper, we have investigated both the process of rare-gas atoms (He, Ne, Ar, Kr, Xe) injected into single-wall carbon nanotube (SWNT) and the mechanical oscillatory behavior of rare-gas atoms sliding in a SWCNT by using molecular dynamics simulations. The minimal diameters of SWCNT to encapsulate rare-gas atoms are obtained, which are from 6.246
Xianghua, Zeng +3 more
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The asymptotic and oscillatory behavior of neutral difference inclusions
Applied Mathematics and Computation, 2004The authors study the asymptotic and oscillatory properties of solutions of the first order neutral difference inclusion \[ -\Delta(x_n-r_n\,x_{n-\tau})\in p_n\,F(x_{n-\sigma_1},x_{n-\sigma_2},\dots,x_{n-\sigma_s}), \quad n=0,1,2,\dots, \tag{\(*\)} \] where \(F:{\mathbb R}^s\to2^{{\mathbb R}^1}\) is a compact convex upper semicontinuous multifunction ...
Mengshu Guo +2 more
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