The precise measurement of the pressure gas enclosed in starting volume a static expansion system is important for achieving low uncertainties. This work focuses on valve closing process and resulting difference. condition flow conservation used to set up model an experimental procedure has been developed investigate change caused by moving plate. Various parameters are evaluated compared with ...

OBJECTIVE To measure the noise produced and related subjective complaints after implantation of four different mechanical heart valve prostheses and to identify further factors related to the patient and prosthesis that influence noise generation and complaints. DESIGN Sound pressure was measured 5 and 10 cm and 1 m from the point of maximal impulse on the body surface by a calibrated meter i...

Considering the trade-off relationship between brake specific fuel consumption (BSFC), combustion noise (CN) and NOx emission, it is a difficult task to optimize them simultaneously in marine diesel engine. In order overcome this problem, novel genetic algorithm improved chicken swarm optimization (GA-ICSO) hybrid was proposed, where enhanced Levy flight adaptive self-learning factor were intro...

This work presents a novel vision-force based interface; allowing a local operator to visually specify a path constraint to a remote robot manipulator. By using our interface the operator is able to control a 7-DOF arm with only 2-DOF. Our interface aims to reduce task complexity and operator cognitive load. We illustrate our approach with 2 mock-up examples: 1) Closing a steam valve, 2) Gluing...

we report a rare case of acute right coronary artery stenosis developing in a patient undergoing aortic valve replacement. we present a case report with a brief overview of the literature relating to coronary artery occlusion associated with cardiac valve surgery – the theories and treatments are discussed. a 85 year-old female was admitted under the care of the  cardiothoracic team with signs ...

As the key control component of water hydraulic systems, proportional valve has a significant influence on performance systems. Due to poor viscosity and lubricity water, spool resistance is large non-linear. In this study, novel fast-response presented. The actuator adopts voice coil motor (VCM), which advantages fast response, high precision small volume. order realize valve, lever amplifier ...

background: beta-thalassemia major is a severe and lethal hemolytic anemia. regular transfusion is necessary for avoidance of its complications but it may end to cardiac involvement secondary to iron overload. angiotensin converting enzyme inhibitors (aceis) are useful medications even in early stages of heart failure. we studied the effects of two common aceis on improvement of heart function ...

Substantial improvements in engine fuel e ciency torque and reduction of emissions are available with cam less actuation capable of continuous control of engine valve lift duration and timing A phenomenological model has been developed for an unthrottled operation that is key to e ciency gain An adaptive nonlinear controller has been designed to coordinate intake valve lift and duration by usin...

we report two cases of tetralogy of fallot with pulmonary valve bacterial endocarditis where one extended to the branch of pulmonary artery (pa). this is a rare occurrence. aggressive supportive care plus early and radical surgery can be life saving.