نتایج جستجو برای: arterial dynamic model
تعداد نتایج: 2510961 فیلتر نتایج به سال:
Vascular calcification is a complex and dynamic process occurring in various physiological conditions such as aging and exercise or in acquired metabolic disorders like diabetes or chronic renal insufficiency. Arterial calcifications are also observed in several genetic diseases revealing the important role of unbalanced or defective anti- or pro-calcifying factors. Pseudoxanthoma elasticum (PX...
although many scholars have proposed all kinds of key successful factors (ksfs) for erp activity to smoothly enhance the implementation of erp, the ksfs are based too much on concept and protocol cannot help an enterprise to achieve this objective. therefore, this research through qualitative interview method, integrating the ksfs and dynamic capability to set up a model so as to exhibit the ki...
The relationships among cerebral blood flow, cerebral blood volume, intracranial pressure (ICP), and the action of cerebrovascular regulatory mechanisms (autoregulation and CO2 reactivity) were investigated by means of a mathematical model. The model incorporates the cerebrospinal fluid (CSF) circulation, the intracranial pressure-volume relationship, and cerebral hemodynamics. The latter is ba...
abstract: ballasted railway track are of the most common types of railway in our country. the aim of this paper is study of three-dimensional suitable model for railway ballasted track and dynamic analysis of that using numerical runge-kutta 4th order method. after the dynamic analysis is performed the responses related to railway components are determined. to analyze the effect of passing rail...
BACKGROUND AND PURPOSE Carotid endarterectomy (CEA) has become a routine procedure to treat symptomatic carotid artery disease and reduce the risk of recurrent cerebral ischemic events. The purpose of this study was to use an arterial spin labeling dynamic magnetic resonance angiography technique to characterize intracranial hemodynamics before and after CEA. METHODS Thirty-seven carotid arte...
Stent implants, specifically those implanted in Superficial Femoral Artery (SFA) in the lower limbs, are prone to high failure rates. The failures can occur due to abnormal behavior of the blood flow, mechanical forces from the arterial wall imposed on the stent, as well as leg movements such as bending, torsion, compression, and elongation that can create dynamic arterial environment imposed o...
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