in this study, the characteristics of the wake around a rotating circular cylinder have been investigated experimentally. to this end, a cylinder with a circular cross-section of plexiglas with the length of 400 mm and a diameter of 20 mm have been tested in the wind tunnel. using existing methods, the characteristics of the wake and the drag coefficients of the model in different cases have be...

ISSUE Many individuals with total blindness can develop a circadian rhythm disorder-called non-24 sleep wake syndrome-because they cannot detect light to resynchronize their sleep-wake cycles. A new melatonin 1 and melatonin 2 agonist tasimelteon improves sleep in these patients, resetting their circadian sleep-wake clocks.

The neurobiology of sleep is introduced in the context of interacting wake and sleep systems. Specifically, the transitions from wake to sleep and from non-rapid eye movement to rapid eye movement sleep are discussed based on the flip-flop switch hypothesis. Regulation of wake and sleep according to the opposing homeostatic and circadian systems are also presented.

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Articles you may be interested in Decay of the supersonic turbulent wakes from micro-ramps The interaction of helical tip and root vortices in a wind turbine wake Distribution of spanwise enstrophy in the near wake of three symmetric elongated bluff bodies at high Reynolds number Large eddy simulation study of scalar transport in fully developed wind-turbine array boundary layers Phys. Effect o...

Wake eld studies using calorimetric methods are reported. Measurements show interference between wake elds generated by two bunches. The described technique can be used to determine which elements introduce bunch coupling. Introduction Due to nite resistance and irregularities of beam pipe wall the bunch of charged particles traveling through a beam pipe leaves behind a wake eld. The structure ...

Eels undulate a larger portion of their bodies while swimming than many other fishes, but the hydrodynamic consequences of this swimming mode are poorly understood. In this study, we examine in detail the hydrodynamics of American eels (Anguilla rostrata) swimming steadily at 1.4 L s(-1) and compare them with previous results from other fishes. We performed high-resolution particle image veloci...

Abstract The thrust producing performance and efficiency of an SD8020 oscillating foil with a symmetrical saw-tooth angle of attack pitching profile was studied through force and torque measurements, as well as dye flow visualization, in the water tunnel at low Reynolds number of 13,000-16,000. The propulsive efficiency and thrust coefficient of the pitching foil were determined as a function o...

Sleep quality has a large impact on daily performance and general health. Among the different methods of objectively measuring sleep quality, actigraphy continues to be very popular. It can take continuous activity measurements over several days in order to determine sleep-wake cycles and calculate sleep variables, including the three standard sleep variables used in determining sleep quality: ...

A number of factors lead to a reduction in airport capacity in weather conditions that prevent the use of visual approach procedures. These factors include a reduction in the number of available runways and the longitudinal wake turbulence separation constraints used by Air Traffic Control (ATC). These wake constraints (table 1) evolved over time to prevent wake encounters in weather conditions...