Results 281 to 290 of about 142,074 (316)

Model for the transition in bluff body wakes

Physical Review Letters, 1994
The transition from a peroidic vortex street to a less ordered state of vortex shedding in the wake of elongated bluff bodies is investigated in the case of a ring. Experimental results characterizing this transition are presented. The complex Ginzburg-Landau model, which is known to accurately describe the periodic regime, is extended to the ...
, Leweke, , Provansal
openaire   +2 more sources

A model of shiftworker sleep/wake behaviour

Accident Analysis & Prevention, 2012
Software-based biomathematical models of alertness provide a means to estimate fatigue-related risk in advance of a schedule being worked. Obtaining a good estimate of employees' sleep/wake behaviour during non-work periods is critical in obtaining accurate estimates of alertness.
David, Darwent, Drew, Dawson, Gregory D, Roach   +2 more
openaire   +2 more sources

Aircraft Wake Vortex Transport Model

Journal of Aircraft, 1973
An analysis has been developed for high-aspect-ratio jet-flap wings of arbitrary geometry and blowing. It appears that the present method is as accurate as other known methods and is flexible and rapid, particularly for discontinuous planforms. Although definitive test data are lacking, correlation with existing experimental data is satisfactory.
M. BRASHEARS, J. HALLOCK
openaire   +1 more source

A mathematical model of the sleep/wake cycle

Journal of Mathematical Biology, 2009
We present a biologically-based mathematical model that accounts for several features of the human sleep/wake cycle. These features include the timing of sleep and wakefulness under normal and sleep-deprived conditions, ultradian rhythms, more frequent switching between sleep and wakefulness due to the loss of orexin and the circadian dependence of ...
Rempe, Michael J., Best, Janet, Terman, David   +2 more
openaire   +3 more sources

Modeling Sleep and Wakefulness in the Thalamocortical System

Journal of Neurophysiology, 2005
When the brain goes from wakefulness to sleep, cortical neurons begin to undergo slow oscillations in their membrane potential that are synchronized by thalamocortical circuits and reflected in EEG slow waves. To provide a self-consistent account of the transition from wakefulness to sleep and of the generation of sleep slow waves, we have constructed ...
Sean, Hill, Giulio, Tononi
openaire   +2 more sources

Benchmarking of a Free Vortex Wake Model for Prediction of Wake Interactions

35th Wind Energy Symposium, 2017
Abstract Turbine-wake interactions pose significant challenges in the development of wind farms. These interactions can lead to an increase in wind energy cost through reduction in wind farm power efficiency as well as a reduction of functional turbine lifetime.
Kelsey Shaler, Krista M. Kecskemety, Jack J. McNamara   +2 more
openaire   +1 more source

An overview of data for wake model evaluation in the Virtual Wakes Laboratory

Applied Energy, 2013
Abstract Improved prognostic models of wind turbine wakes are essential to improved design of offshore wind farms to maximized power production and minimize turbine fatigue loading. This paper describes the Virtual Wake Laboratory, an online open access resource that provides meteorological and wind farm data for use in wake characterization and wake
R.J. Barthelmie, S.C. Pryor
openaire   +1 more source