نتایج جستجو برای: intake valve deactivation
تعداد نتایج: 219782 فیلتر نتایج به سال:
Design, modeling, and measurements are discussed for a new direct-drive, electromagnetic valve actuator (EVA) for internal combustion engines. The actuator offers greater dynamic performance than previous designs and achieves fully flexible valve timing and lift, which provides great benefits in engine performance including increased engine efficiency, reduced emissions, and improved low-end pe...
The current study demonstrates an experimental investigation of the tumble flow structures using Particle Image Velocimetry (PIV) under steady-state conditions considering the central vertical tumble plane. The experiments were carried out on a four-valve, pent-roof Gasoline Direct Injection (GDI) engine head at different valve lifts and with a pressure difference of 150 mmH2O across the intake...
Primary heart tumors are not common. Âlthough myxoma is the most common tumor of the heart, mitral valve myxoma is extremely rare. The patient is a 55 years old woman who had atypical retrosternal pain, retinal artery emboli and visual deficit. Ïn transesophageal echocardiography a (4x3x3) cm mass was detected in posterior leaflet of mitral valve. The posterior leaflet of mitral valve was tot...
Prolapsed Mitral Valve Syndrome is a common, benign disorder with prevalence of %0.3-6 in population. This syndrome also is known as Barlows Syndrome and Flaapy Mitral Valve Syndrome. Prolapsed Mitral Valve is the dropping of one or two mitral valve leaflet(s) into the left atrium during ventricular systole. This malformation leads to incomplete closing of mitral valve and regurgitates the bloo...
Introduction: Quality of life and aggression are variables that are important for adolescents with behavioral problems. The aim of this study was to determine the effectiveness of family mode deactivation treatment, cognitive-behavior therapy, and acceptance-commitment therapy on quality of life of mothers and aggression of female adolescent with behavioral problems. Methods: The research metho...
A novel free piston expander-linear generator (FPE-LG) integrated unit was proposed to recover waste heat efficiently from vehicle engine. This integrated unit can be used in a small-scale Organic Rankine Cycle (ORC) system and can directly convert the thermodynamic energy of working fluid into electric energy. The conceptual design of the free piston expander (FPE) was introduced and discussed...
Introduction: With the development of interventional cardiology in the world, in addition to coronary and aortic diseases, the treatment of heart valve diseases through catheters has recently begun. The treatment of aortic stenosis (which was only possible with open surgery and valve replacement) was first performed in the world in 2002 by Alain Cribier in France with catheter insertion of the ...
GABA(A) and GABA(B) receptors activation with agonists muscimol and baclofen, respectively in the lateral parabrachial nucleus (LPBN), induces water and hypertonic NaCl intake in rats. The purpose of this study was to examine the effects of previous injections of losartan (AT(1) angiotensin receptor antagonist) into the LPBN on 0.3M NaCl and water intake induced by baclofen injected bilaterally...
quadricuspid aortic valve (qav) is an uncommon congenital anomaly which was an incidental finding during surgery or autopsy in the past. we present the case of a 44-year-old woman with moderately severe aortic regurgitation due to unequal cusp size qav diagnosed via transesophageal echocardiography. due to echocardiographic imaging improvement, the diagnosis of qav is now easier and earlier tha...
OBJECTIVE Calcific aortic valve disease (CAVD) is a major public health problem with no effective treatment available other than surgery. We previously showed that mature heart valves calcify in response to retinoic acid (RA) treatment through downregulation of the SRY transcription factor Sox9. In this study, we investigated the effects of excess vitamin A and its metabolite RA on heart valve ...
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