نتایج جستجو برای: karkhe inverted siphon
تعداد نتایج: 22179 فیلتر نتایج به سال:
Meltran V, a new biped robot with telescopic legs, is introduced. For 3D walking control of the robot we analyze the dynamics of a three-dimensional inverted pendulum in which motion is constrained to move along an arbitrarily de ned plane. From this analysis we obtain simple linear dynamics, the ThreeDimensional Linear Inverted Pendulum Mode (3DLIPM). Using a real-time control method based on ...
So-called neurovascular coupling reflects local blood flow changes that accompany neuronal activity. Not only is this a homeostatic metabolic mechanism, but it also serves as the basis for functional brain imaging. The theory goes that glia cells siphon activity-generated extracellular potassium ions to glial endfeet abutting small blood vessels, leading to vessel relaxation. Not so, say Metea ...
In Aplysia, long-term synaptic plasticity is induced by serotonin (5-HT) or neural activity and requires gene expression. Here, we demonstrate that ApLLP, a novel nucleolus protein, is critically involved in both long-term facilitation (LTF) and behavioral sensitization. Membrane depolarization induced ApLLP expression, which activated ApC/EBP expression through a direct binding to CRE. LTF was...
tooth impaction rarely occurs in primary dentition. most of the primary teeth impactions are seen in second molars. the purpose of this article is to present a 4-year-old girl with bilateral impaction of inverted primary maxillary central incisors which trauma had displaced their tooth germ before erupting.
Inverted papillomas of the nose and paranasal sinuses are uncommon neoplasms, characterized by their tendency to occur and by their association with malignancy. In the past decade there has been a trend toward the use of endoscopic surgical techniques in the management of these tumors. This article presents the results of a prospective study of24 patients with inverted papilloma resected by...
A siphon is suggested to support cerebral blood flow but appears not to be established because internal jugular venous (IJV) pressure is close to zero in upright humans. Thus, in eleven young healthy males, IJV pressure was 9 ± 1 mmHg (mean ± SE) when supine and fell to 3 ± 1 mmHg when seated, and middle cerebral artery mean blood velocity (MCA Vmean; P < 0.007) and the near-infrared spectrosco...
This paper considers the deadlock avoidance problem for the class of conjunctive / disjunctive (sequential) resource allocation systems (C/D-RAS), which allows for multiple resource acquisitions and flexible routings. A new siphon-based characterization of deadlocks arising in C/D-RAS is developed, and subsequently, this characterization facilitates the development of a polynomial-complexity de...
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