نتایج جستجو برای: 10 bar
تعداد نتایج: 1041993 فیلتر نتایج به سال:
Using high resolution N-body simulations of stellar disks embedded in cosmologically motivated dark matter halos, we study the evolution of bars and the transfer of angular momentum between halos and bars. We find that dynamical friction results in some transfer of angular momentum to the halo, but the effect is much smaller than previously found in low resolution simulations and is incompatibl...
[Purpose] The purpose of this study was to compare shoulder stabilization muscle activities according to postural changes during flexi-bar exercise. [Subjects] The subjects included 18 students (10 males, 8 females) at B University. [Methods] The subjects performed the following flexi-bar exercises: 1) medio-lateral oscillation with the 90° shoulder abduction, with the hand in the neutral posit...
A brief review of the technological advances of the Hopkinson bar technique in tension for the study of irradiated/non-irradiated nuclear materials and the development of this technology for large specimens is presented. Comparisons are made of the dynamic behaviour of non-irradiated and irradiated materials previously subjected to creep, low cycle fatigue and irradiation (2, 10 and 30 displace...
We analyze, with the computer code LS-DYNA, three-dimensional (3D) transient deformations of a 10-layer woven Kevlar armor held in a square steel frame and impacted at normal incidence by a 9 mm FMJ (full metal jacket), 124 grain projectile. The composite armor is discretized into weft and warp yarns to simulate its woven structure. The yarn is modeled as a 3D continuum. We consider failure of ...
We investigated the clinical effects of a food bar enriched with L-arginine and a combination of other nutrients known to enhance the activity of endothelium-derived nitric oxide (EDNO) in individuals with claudication from atherosclerotic peripheral arterial disease. The study was a 2-week, double-blind, placebo-controlled trial of subjects randomized to three groups (two active bars, one acti...
We propose that the off-centered “bar” in the Large Magellanic Cloud (LMC) is an unvirialized structure slightly misaligned with, and offset from, the plane of the LMC disk. The small displacement and misalignment are consequences of recent tidal interactions with the SMC and the Galaxy. This proposal, though radical, is consistent with the kinematics of the LMC and near-infrared star count map...
We have mapped the emission from atomic hydrogen at λ=21 cm from the galaxy NGC 3783 with the Australia Telescope Compact Array. Our main results are: a) the HI morphology is irregular and perturbed, gathered in three blobs apparently unrelated to the optical morphology ; b) the observed HI velocity distribution indicates a normal disk in differential rotation with a constant velocity out to a ...
Time-resolved x-ray diffraction techniques for bulk polycrystalline materials under dynamic loading.
We have developed two techniques for time-resolved x-ray diffraction from bulk polycrystalline materials during dynamic loading. In the first technique, we synchronize a fast detector with loading of samples at strain rates of ~10(3)-10(4) s(-1) in a compression Kolsky bar (split Hopkinson pressure bar) apparatus to obtain in situ diffraction patterns with exposures as short as 70 ns. This appr...
A combined experimental/analytical work is carried out to elucidate the energy absorption potential of laterally confined bars under monotonically increasing edge displacement. The thickness t and length L of the bar, as well as the wall-to-wall separation distance, h, are systematically varied. Real-time observations show that the deformation of the bar is characterized by progressive buckling...
BACKGROUND Thoracoscopic Nuss funnel chest repair still has a significant complication rate. Bar dislocation, pneumothorax, pleural effusions, and pericarditis seem to be caused mechanical irritation by the bar. We intended to reduce these problems by further technical modification of the Nuss technique. METHODS Of 157 prospectively followed modified Nuss repairs, the last 57 patients had the...
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