نتایج جستجو برای: weightlessness
تعداد نتایج: 445 فیلتر نتایج به سال:
Orthostatic intolerance follows actual weightlessness and weightlessness simulated by bed rest. Orthostasis immediately after acute exercise imposes greater cardiovascular stress than orthostasis without prior exercise. We hypothesized that 5 min/day of simulated orthostasis [supine lower body negative pressure (LBNP)] immediately following LBNP exercise maintains orthostatic tolerance during b...
Whenever the legs are lowered in humans, a venoarteriolar reflex is activated by the hydrostatic distension of the venules. Through local axon reflexes, the adjacent arterioles are contracted to decrease blood flow and prevent formation of edema. Because the venoarteriolar reflex is activated by gravity, we tested the hypothesis that long-term weightlessness would attenuate it. The reduction in...
This Human Research Facility (HRF) experiment focuses on how human spatial orientation mechanisms adapt during prolonged (3-6 month) exposure to weightlessness, and the time course of readaptation after return to earth. It will utilize the HRF Rack 2 Workstation as a "science kiosk" for the crew to study the role of visual, vestibular, and hap tic cues on spatial orientation. The removal of gra...
To explore the effects of long-term weightlessness on the renal tissue, we used the two months tail suspension model to simulate microgravity and investigated the simulated microgravity on the renal morphological damages and related molecular mechanisms. The microscopic examination of tissue structure and ultrastructure was carried out for histopathological changes of renal tissue morphology. T...
Executives at APIX, Senegal’s state investment-promotion agency, cast their office as the vanguard of a new kind formation, one remade through decades austerity and resolutely focused on nation’s future. They imagined PowerPoint especially critical to this mission, it had potential move beyond confines paper form parochial bureaucratic routine into wider world. In article, I explore complex rel...
In this paper, we study the problem on small motions of ideal relaxing fluid that fills a uniformly rotating or fixed container. We prove theorem uniform strong solvability corresponding initial-boundary problem. case where system does not rotate, find asymptotic behavior solution under stress special form. investigate spectral associated with considered system. obtain localization results for ...
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