نتایج جستجو برای: flow deficit
تعداد نتایج: 543787 فیلتر نتایج به سال:
The purpose of this study was to determine if chronic fatigue syndrome (CFS) is associated with reduced blood flow and oxidative delivery to skeletal muscle. Patients with CFS according to CDC (Center for Disease Control) criteria ( n =19) were compared with normal sedentary subjects ( n =11). Muscle blood flow was measured with Doppler ultrasound after cuff ischaemia and exercise. Muscle oxyge...
AIMS To evaluate the diagnostic power of integrating the results of computed tomography angiography (CTA) and CT myocardial perfusion (CTP) to identify coronary artery disease (CAD) defined as a flow limiting coronary artery stenosis causing a perfusion defect by single photon emission computed tomography (SPECT). METHODS AND RESULTS We conducted a multicentre study to evaluate the accuracy o...
Global Stability Analysis of the Interaction Between a Longitudinal Vortex and an Oblique Shock Wave
In this study, the interaction of a longitudinal vortex with an oblique shock was studied numerically. A global stability approach used to investigate onset unsteadiness due breakdown. For purpose, steady and unsteady laminar flow simulations were performed. exponentially decaying tangential velocity profile, so-called Erlebacher vortex, introduced into field by modification inflow boundary, wh...
Due to the background in the mixed compression engine inlets, the Shock wave/ Turbulent Boundary Layer Interaction (STBLI) problem has been one of the concerns of the aerodynamic industry. Shock-induced separation and the corresponding interaction make the flow losing its quality and reduce inlet total pressure recovery. Various flow-control methods have been tried and investigated by lots of r...
Centella asiatica extract on cognition and hippocampal pathology of mild chronic cerebral hypoperfusion (CCH) that was induced by permanent right common carotid artery occlusion (RCO) in rats. Materials and Methods: Sixty-four male Sprague-Dawley rats were randomly divided into four groups of Sham-veh, Sham-C. asiatica, RCO-veh and RCO-C. asiatica, which were further divided into short-term and...
Sustainability of groundwater resources means ensuring the permanent availability of essential groundwater services for a long-time. This research was conducted to investigate the sustainability of groundwater resources in the prohibited plain of Behshahr- Bandar-e-Gaz by using water expoliation and green water scarcity indices. Initially, the green water deficit index was calculated based on t...
نیترات از مهم ترین منابع نیتروژنی مورد استفاده گیاهان است که به صورت طبیعی در خاک، آب، گیاه، آب های سطحی، محصولات کشاورزی و فضولات دامی وجود دارد و می تواند از طریق استفاده از کودهای حیوانی یا شیمیایی به خاک اضافه گردد. در این مطالعه از گیاه نی برای کاهش یا حذف آلاینده نیترات از آب در مقیاس آزمایشگاهی استفاده شد. برای انجام این تحقیق از دو سری راکتور استفاده شد. مرحله اول شامل راکتور حاوی گونه ...
سرریز یکی از سازه های هیدرولیکی وابسته سد برای کنترل سطح آب مخزن و تخلیه سیلاب است. هدف اصلی در تحقیق حاضر، شبیه سازی عددی جریان بر روی سرریز ogeeبا استفاده از مدل ریاضی flow-3d بوده است. رودخانه نازلو یکی از مهم ترین رودخانه های غربی حوضه دریاچه ارومیه است. سد مخزنی نازلو در شمال باختری ارومیه بر رودخانه نازلو احداث می گردد. مدل فیزیکی سرریز سد مخزنی نازلو با مقیاس 1:40 در موسسه تحقیقات آب وزا...
A patient with a symptomatic petrous carotid artery stenosis underwent balloon angioplasty, which was complicated by a flow-limiting dissection. The problem was resolved by deploying a balloon-expandable coronary stent. The patient suffered no neurologic deficit, was discharged within 12 hours, and was asymptomatic at last follow-up, 5 months after the procedure, without warfarin therapy. This ...
A rare case of partially thrombosed giant serpentine right middle cerebral artery aneurysm presented. A 26 year old man initially presented with headache and 3 months later developed neurological deficit. Various stages of clot with patent residual lumen seen on neuroimaging, led to the diagnosis. Catheter angiography is the investigation of choice for evaluating the location, flow dynamics and...
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