Unlike the steady decline observed in coronary artery bypass graft (CABG) surgery rates over the last couple of decades [1], there has been a rise in non-congenital [2] and congenital heart valve operations through the last 10–15 years [3]. This upsurge can firstly attributed to the increasing prevalence of degenerative valvular heart disease due to the rising age of the population worldwide. S...

The X-ray microbeam method for measurement of articulatory dynamics has been used to acquire large amounts of data, with reduced X-ray dosage, resulting in one of the most widely used freely available speech production databases. The Xray Microbeam Speech Production Database (XRMB-SPD), developed at Wisconsin University, USA, includes a vast amount of coordinate data describing articulatory mov...

This thesis addresses modeling and active surge control of a simple compression system, using only the drive system of the compressor for actuation. Theoretical results are validated by experiments on a test rig that was built as a part of this work. Control laws are derived in two stages. First all system states, such as pressure mass ‡ow and impeller speed, are assumed as available signals. A...

Background: Heart valve disease gradually increases the pressure in the heart chambers and impairs heart pumping. It influences on quality of life due to low output, disability, fear, amnesia, anxiety, and depression. Although most of signs and symptoms in patients with heart valve diseases may significantly decrease after valve replacement surgery, there is limited information about the impact...

This paper denouements the study of operating parameters of a hydraulic transmission system with and without the application of hydraulic accumulator. In this respect, the hydraulic system, designed in the open circuit mode, consists of the fixed displacement hydraulic pump which gives pressured fluid to the hydro-motor and charges the accumulator as well. The load on the motor is controlled hy...

This document is included in the Annex of Part 7 as historical background of a well-intentioned task that was completed at too slow a pace, missing its target date for serving as a reference for other in-process IEC standards projects concerned with low-voltage surge-protective devices. For the sake of historical accuracy and perspective, the document is presented here in its draft form, includ...