BACKGROUND Mechanical valves and bioprostheses are widely used for aortic valve replacement. Though previous randomised studies indicate that there is no important difference in outcome after implantation with either type of valve, knowledge of outcomes after aortic valve replacement is incomplete. OBJECTIVE To predict age and sex specific outcomes of patients after aortic valve replacement w...

Background This study was performed to determine independent predictors of long-term outcome after percutaneous balloon dilation of congenital pulmonary valve stenosis. Smaller follow-up series of patients after balloon pulmonary valvuloplasty have shown inconsistent results regarding the independent relation between prognostic factors and longterm outcome, as many patient selection and technic...

The hot gases produced by the internal combustion engines passes through the exhaust valve and causes high temperatures in the exhaust valve and its seat. To avoid damaging the exhaust valve, heat must be transferred from the valve to its seat during the contact they make at the opening and closing cycle. Heat transfer rate from the exhaust valve to its seat is a function of many factors. One o...

Economic load dispatch (ELD) is an important optimization task in power system. It is the process of allocating generation among the committed units such that the constraints imposed are satisfied and the energy requirements are minimized. There are three criteria in solving the economic load dispatch problem. They are minimizing the total generator operating cost, total emission cost and sched...

We have read with the greatest interest the paper by Wolfgang A. Goetz et al. entitled Truly stentless molded autologous pericardial aortic valve prosthesis with single point attached commissures in a sheep model [1]. We congratulate the authors on their achievements in the development of valve bioprosthesis. Apparently an autologous valve prosthesis is the subject of thorough study in the Medi...

BACKGROUND This study was performed to determine independent predictors of long-term outcome after percutaneous balloon dilation of congenital pulmonary valve stenosis. Smaller follow-up series of patients after balloon pulmonary valvuloplasty have shown inconsistent results regarding the independent relation between prognostic factors and long-term outcome, as many patient selection and techni...

In this paper proposed optimal solution for Economic Dispatch (ED), problem has been suggested by Particle Swarm Optimization (PSO). PSO could schedule operating generator with to consider fuel cost, satisfying load demand and operational constraints so that optimization results are obtained. article, the ED is formulated as a single objective considering cost of generating units. Test cases, h...

The magnetoresistance of Ni/V2O3/Py devices shows interesting behavior in the temperature dependence across the V2O3 metal-insulator transition. A spin-valve effect ( 0.1%) is found below the transition temperature when V2O3 is in the insulating phase. Contrary to expectation, the spin-valve effect disappears when device is heated above 150 K and V2O3 is in the metallic state. At these temperat...

In this paper, a hierarchical control architecture incorporating a novel dual-arm impedance controller is proposed and experimentally evaluated in a valve turning setup. Proposed control architecture incorporates various control/interface modules to render a desired interaction performance in our intrinsically compliant humanoid robot, COMAN: the sensing module provides the manipulation module ...

introduction: rheumatic heart disease still remains one of the leading causes of congestive heart failure and death owing to valvular pathologies, in developing countries. valve replacement still remains the treatment of choice in such patients.the aim of this study wasto analyze the postoperative outcome of  double valve replacement (mitral and aortic ) in patients of rheumatic heart disease. ...