Moore’s Law is a commonly accepted empirical relation that predicts the operating speed of an integrated circuits will double every 18 months. However, as the operating speed and functionality increases, the need to move data onto and off of the processor is increasing at a comparable rate, which is quantified using another empirical relation known as Rent’s Rule. Unfortunately, Rent’s rule sta...

Continuous Flow Left Ventricular Assist Devices (CF-LVADs) generally operate at a constant speed, which causes a decrease in pulse pressure and pulsatility in the arteries and allegedly may lead to late complications such as aortic insufficiency and gastrointestinal bleeding. The purpose of this study is to increase the arterial pulse pressure and pulsatility while obtaining more physiological ...

This work presents a novel control index to regulate the pump speed of an axial flow blood pump for the left ventricular assist device (LVAD). The control index is based on the characterization of pump operating conditions such as normal or suction status. The pump operating characteristics reveal that a certain pulsatility relationship between the pump pressure difference and the pump flow is ...

This paper evaluates several hardware platforms and operating systems using a set of benchmarks that stress kernel entry/exit, file systems, and other things related to operating systems. The overall conclusion is that operating system performance is not improving at the same rate as the base speed of the underlying hardware. The most obvious ways to remedy this situation are to improve memory ...

Tests for measuring the real-time operating system performance belong to the software technology. They give quantitative measures for the most important characteristics and allow the implementer to compare the efficiency of various operating systems. This paper presents a set of simple tests for measuring the real-time operating system characteristics. The tests require no specialized hardware,...

Beneficiation of a low-grade iron ore was investigated by combination of the low-intensity magnetic separation and reverse flotation methods. The main constituents of the representative sample were 36.86% Fe, 8.1% FeO, 14.2% CaO, 13.6% SiO2, and 0.12% S based on the X-ray fluorescence, titration, and Leco analysis methods. The mineralogical studies by the X-ray diffraction, scanning electron mi...

While drivers’ speed behaviour has been widely studied, only marginal attention to the speed behaviour at intersections has been dedicated and more research is needed. Aim of this study was: (1) to evaluate if the intersections significantly affect drivers’ speed along the major road; (2) to quantify this interaction in terms of both speed change at the center of the intersection and speed prof...

Model Predictive and Linear Quadratic Gaussian controllers are designed for a 5MW variable-speed pitchregulated wind turbine for three operating points – below rated wind speed, just above rated wind speed, and above rated wind speed. The controllers are designed based on two different linear dynamic models (at each operating point) of the same wind turbine to study the effect of utilising diff...

Using identical mechanical hardware used in an automobile, a stationary test bench has been developed for an automotive air conditioning system (AACS). However, a number of additional sensors have been used in the system for an accurate assessment of its performance. The steady state performance of the system has been investigated for three independent variables, namely the refrigerant charge l...