نتایج جستجو برای: compression pressure
تعداد نتایج: 491387 فیلتر نتایج به سال:
The structure of antigorite (m = 17) has been studied by density functional theory from 0 to 30 GPa. The fourth-order Birch-Murnaghan equation of state fit of the thermally corrected LDA results yields an equilibrium volume (V0 = 2853.13 Å3), bulk modulus (K0 = 64.6 GPa), and its pressure derivative (K0′ = 6.94) in good agreement with experimental results. Two changes in compression mechanism o...
BACKGROUND AND PURPOSE Sequential compression is used to manage lymphedema, but little is known about pressures delivered to the therapeutic targets. This study characterized actual pressures delivered by a traditional compression pump (Lympha Press [LP]) and one using an alternate compression pattern (Flexitouch [FT]). SUBJECTS Ten adults who were healthy volunteered to participate in the st...
BACKGROUND The incidence of hematoma formation following implantation of a cardiovascular implantable electronic device (CIED) is estimated to be 5% even if a pressure dressing is applied. It is unclear whether a pressure dressing can really compress the pocket in different positions. Furthermore, the adhesive tape for fixing pressure dressings can tear the skin. We developed a new compression ...
BACKGROUND Traumatic brain injury (TBI) remains a devastating condition for which extracranial protection traditionally has been in the form of helmets, which largely fail to protect against intracranial injury. OBJECTIVE To determine whether the pathological outcome after traumatic brain injury can be improved via slosh mitigation by internal jugular vein (IJV) compression. METHODS Two gro...
Pressure ulcers develop in patients who endure long periods of immobilization, often caused by conditions such as musculoskeletal and neurological diseases. Pressure ulcers adversely affect the patient and increase caregiver burden and healthcare costs. Typical sites for these ulcers include the sacrum, trochanters, and heels; they also occur on the nape of the neck, penis, nostrils, helix of t...
[1] We present a study of the response of the geosynchronous magnetic field to abrupt enhancements of the solar wind dynamic pressure. Results are obtained separately for cases of northward and southward interplanetary magnetic field (IMF) prior to and after the solar wind pressure jump. For pressure enhancements with southward IMF we find that the response of the geosynchronous magnetic field ...
The achievement of high gain with inertial fusion requires the compression of hydrogen isotopes to high density and temperatures. High densities can be achieved most efficiently by isentropic compression. This requires relatively slow pressure pulses on the order of 10-20 nanoseconds; however, the pressure profile must have the appropriate time history [J. Nuckolls et. al. Nature, 239, 139, 197...
Local compression is known to damage peripheral nerves. Severe compression may actually crush the fibres and lead to Wallerian degeneration; the excitability of the nerve distal to the lesion is lost and recovery may take many months (Seddon, 1943; Denny-Brown & Brenner, 1944 a). Mild compression produces a physiological block which is reversed as soon as the pressure is released. On the basis ...
Compression Ignition (CI) engines are widely used for transportation, agriculture, power generation and industrial applications. The conventional fuel for CI engine is petro diesel. Among the countries in the world, India is one of the largest consumers of petro diesel fuel. Indian economy is very much dependant on the consumption of petro diesel. Brake thermal efficiency, brake specific fuel c...
The physiological role of endothelin-1 (ET-1) in regulation of vascular tone in the perinatal lung is controversial. Recent studies suggest that ET-1 contributes to high basal pulmonary vascular resistance in the normal fetus, but its role in the modulation of pulmonary vascular tone remains uncertain. We hypothesized that high ET-1 activity opposes the vasodilator response to some physiologica...
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