Results 231 to 240 of about 132,762 (268)
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Wake Effects of Honeycomb Stiffeners
24th AIAA Aerodynamic Measurement Technology and Ground Testing Conference, 2004*† ‡ § ** In order to obtain uniform velocity and low levels of turbulence in a wind tunnel, flow conditioning must be incorporated in the stilling chamber upstream of the test section. Stilling chambers can employ a variety of honeycomb and screen combinations to help achieve the flow specifications required in the test section.
Pike Saunders +4 more
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Nonequilibrium Effects in Near-Wake Ionizing Flows
AIAA Journal, 1997Summary: An analysis of thermal and chemical nonequilibrium effects in near-wake ionizing flows is presented. The influence of real-gas effects on the establishment of scaling laws of the near-wake properties is analyzed, and a simplified model, which relies on an idealized flow solver still capable of accounting for dissociation and ionization effects,
GRASSO, Francesco, PIROZZOLI, Sergio
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The effects of climate on wakefulness and fatigue
International Journal of Vehicle Design, 2006The level of alertness is regulated and influenced by factors associated with sleep, diurnal rhythms, time factors and a number of individual and environmental parameters. Environmental factors with an effect on wakefulness and drowsiness are sound, temperature, light, vibration, ventilation, ergonomics, physical activity and nutritional intakes ...
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Wake Effects of Free-Wake Model on Aeroelastic Behavior of Hovering Rotors
Journal of Aircraft, 2011The wake effects on aeroelastic deflections and aerodynamics for the isotropic and composite rotor blades have been investigated. To take into account the large deflections and rotations of rotor blades, a large-deflection beam modelwas used. A free-wake model basedon vortex-lattice method wasused to obtain the aerodynamic forces while considering wake
Yoo, SJ Yoo, Seung-Jae +2 more
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Wake Interaction Effects Using a Parallelized Free Vortex Wake Model
34th Wind Energy Symposium, 2016Turbine-wake interactions pose significant challenges in the development of optimal wind farm configurations. These interactions can lead to a marked reduction in wind farm power efficiency as well as an increase in structural loading, which reduces the functional lifetime.
Kelsey Shaler +2 more
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Effect of quinolinic acid on wakefulness and sleep in the rabbit
Journal of Neural Transmission, 1990Quinolinic acid (QUIN), an endogenous neuroactive metabolite of tryptophan, administered i.c.v. in doses of 45, 90, 180, and 270 nmol in rabbits, demonstrated an excitatory action on the sleep-wake cycle and behaviour. Doses of 90 and 180 nmol completely abolished the paradoxical sleep phase and induced a 5-fold decrease in the duration of deep slow ...
A M, Milaśius +2 more
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Effect of the number of blades on propeller wake evolution
Experiments in Fluids, 2007The effect of the number of blades on wake evolution was investigated on three propellers having the same blade geometry but different numbers of blades. The experiments concerned velocity measurements along nine transversal planes of the wake by LDV phase-sampling techniques.
Felli M, Guj G, Camussi R
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Effect of Wake on Wave Resistance
Journal of Ship Research, 1972Suction is applied to the boundary layer of a ship model designed to be of minimum resistance for a Froude number V/(Lg)1/2= 0.289. The total resistance with suction is measured and the wave resistance is calculated by a wave-survey method. For the design speed the wave resistance is observed to remain almost constant up to a certain suction value and ...
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Effects of antidepressant drugs on wakefulness and sleep in the cat
Electroencephalography and Clinical Neurophysiology, 1969Abstract Wakefulness-sleep cycles were determined for each 24 hour period during control days and each day following the administration of various antidepressant agents; i.e. , amitriptyline, desmethylimipramine and imipramine; chlorpromazine and perphenazine; pargyline; or methamphetamine.
M B, Wallach +3 more
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Growth Hormone Effects on Sleep and Wakefulness in the Rat
Neuroendocrinology, 2008The sleep-wakefulness pattern and brain protein levels were determined in rats for 3 h following these conditions: administration of an inhibitor of protein synthesis (anisomycin), administration of several doses of rat growth hormone (GH) or thyrotropin, and administration of a combination of anisomycin + GH or thyrotropin.
R R, Drucker-Colín +4 more
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