Abstract Standing wave thermoacoustic refrigerator uses stack, is the heart of cooling system. The porous stack in resonator tube develops temperature difference across for heat pumping upon loudspeaker sound interaction oscillating gas. In this paper, optimization stack-heat exchangers system and discussed using linear theory better COP power refrigerator. assumed to provide required acoustic ...

Numerous studies have focused on alterations in plasma volume (PV) on interventions like quiet standing, exercise, or heat stress. However, no method seems capable of truly estimating the PV alteration. Therefore, an attempt was made to validate commonly used indexes of PV changes. Quiet standing was used to cause graded PV reductions estimated from hemoglobin and hematocrit (Hb/Hct) and from s...

Assistant Surgeon, Bengal Medical Service. Futteh Singh, a sepoy of the 5th Regiment, Native Light Infantry, was admitted into the hospital of this regiment, on the 7th of August, 1871, suffering from the following symptoms:?ascites; general anasarca, both feet and legs being especially oodematous; a feeling of great weakness; partial anorexia; a dull continuous aching pain in the lumbar region...

The middle-latitude standing wave problem is investigated by means of a quasi-geostrophic, linear, steadJ;-state model in which the zonal current is perturbed by the lower boundary topography and by a distribution of heat sources and sinks. All the perturbations are assumed to have a single meridional wavelength and the dissipation is considered to take place in the surface boundary layer using...

We show theoretically that the low-field carrier mobility in silicon nanowires can be greatly enhanced by embedding the nanowires within a hard material such as diamond. The electron mobility in the cylindrical silicon nanowires with 4-nm diameter, which are coated with diamond, is 2 orders of magnitude higher at 10 K and a factor of 2 higher at room temperature than the mobility in a free-stan...

The scaling of turbulence-driven heat transport with system size in magnetically confined plasmas is reexamined using first-principles based numerical simulations. Two very different numerical methods are applied to this problem, in order to resolve a long-standing quantitative disagreement, which may have arisen due to inconsistencies in the geometrical approximation. System size effects are f...

INTRODUCTION How do birds, like flamingos (Phoenicopteridae), sleep while standing on one leg? It is suggested that this behavior reduces heat energy lost through the legs [1]. Yet, the muscular energy required to actively support the body in this pose would likely offset any thermal benefits. In particular, flamingo femurs are oriented horizontally (Figure 1), which places the knee and hip joi...

High radio-frequency (rf) losses measured for cavities in original Continuous Electron Beam Accelerator Facility (CEBAF) cryomodules, compared to the single-cavity tests, have been a long-standing issue related their performance. We summarize experimental evidence of increased rf CEBAF arising from fundamental power coupler cold window and waveguide, respectively. Cryogenic tests were done on t...

Postural stress tests are useful in the assessment of cardiovascular reflex response of normal subjects who may be involved in specialised occupations such as flying; in order to study the effects of physiological stresses such as heat stress, hypoxia, simulation of weightlessness; physiological evaluation of cosmonaut candidates, in patients who may have autonomic neuropathy. Most commonly qui...