Browsing Faculty Contributions by Title
Now showing items 7795-7814 of 17411
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A high precision resolver-to-DC converter
( IEEE , 2005 , Article)A newly developed resolver converter, providing a pseudolinear voltage proportional to the shaft angle, is presented. This converter is based on a new concept involving the absolute values of the demodulated sine and cosine ... -
High pressure CO2 absorption studies on imidazolium-based ionic liquids: Experimental and simulation approaches
(2013 , Article)A combined experimental-computational study on the CO2 absorption on 1-butyl-3-methylimidazolium hexafluophosphate, 1-ethyl-3-methylimidazolium bis[trifluoromethylsulfonyl]imide, and 1-butyl-3-methylimidazolium ... -
High prevalence of cardiovascular risk factors and insulin resistance 6 years after hyperglycemia first detected in pregnancy in Cape Town, South Africa
( BMJ Publishing Group , 2019 , Article)Objective To investigate the prevalence and associated cardiovascular risk factors 6 years after hyperglycemia first detected in pregnancy (HFDP) in Cape Town, South Africa. Research design and methods Data were collected ... -
High prevalence of the risk of overweight and overweight among Qatari children ages 9 through 11
( Emerald , 2009 , Article)Purpose – The purpose of this paper is to estimate the prevalence of the risk of overweight and overweight in Qatari children ages 9 through 11 and to compare the prevalence using CDC and IOTF cut-offs. Design/methodo ... -
High purity/recovery separation of propylene from propyne using anion pillared metal-organic framework: Application of vacuum swing adsorption (vsa)
( MDPI AG , 2021 , Article)Propylene is one of the world’s most important basic olefin raw material used in the production of a vast array of polymers and other chemicals. The need for high purity grade of propylene is essential and traditionally ... -
High school students' STEM interests and career aspirations in Qatar: An exploratory study
( Elsevier , 2023 , Article)This study sought to explore high school students' interest in science, technology, engineering, and mathematics (STEM) related disciplines and careers in the context of Qatar. Quantitative data was collected using a survey ... -
High Selenium Intake is Associated with Endothelial Dysfunction: Critical Role for Endoplasmic Reticulum Stress
( Hamad bin Khalifa University Press (HBKU Press) , 2016 , Conference Paper)Selenium is associated with insulin resistance and may therefore affect endothelial function, increasing type II diabetes risk and associated cardiovascular-disease risk. However the underpinning molecular mechanisms ... -
High sensitivity H2S gas sensors using lead halide perovskite nanoparticles
( Elsevier , 2022 , Article)We report the development of a high sensitivity H2S gas sensor based on perovskite nanoparticles, which can be synthesized using relatively simple solution-growth methods. The gas sensor was fabricated from the metal halide ... -
High step-up single switch quadratic modified SEPIC converter for DC microgrid applications
( Institution of Engineering and Technology , 2020 , Article)A new non-isolated high-voltage gain single switch quadratic modified single-ended primary-inductor capacitor (SEPIC) DC-DC converter is proposed in this study. The proposed converter consists of a modified SEPIC converter ... -
High strength, ductility, and electrical conductivity of in-situ consolidated nanocrystalline Cu-1%Nb
( Elsevier Ltd , 2018 , Article)Nanocrystalline metals—with grain sizes less than 100 nm— have strengths exceeding those of coarse-grained and even alloyed metals [1], [2]. A bulk nanocrystalline Cu-1%Nb alloy was synthesized by an in-situ consolidation ... -
High temperature thermal stability of innovative nanostructured thin coatings for advanced tooling
( Trans Tech Publications Ltd , 2014 , Article)Tools for machining are made of hard steels and cemented carbide (WC-Co). For specialized applications, such as aluminium machining, diamond or polycrystalline cubic boron nitride are also used. The main problem with steel, ... -
High toughness resorbable brushite-gypsum fiber-reinforced cements
( Elsevier Ltd , 2021 , Article)The ideal bone substitute material should be mechanically strong, biocompatible with a resorption rate matching the rate of new bone formation. Brushite (dicalcium phosphate dihydrate) cement is a promising bone substitute ... -
High voltage pulse generator based on DC-to-DC boost converter with capacitor-diode voltage multipliers for bacterial decontamination
( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference Paper)High voltage pulse generators can be used effectively in water treatment applications, as applying a pulsed electric field on the infected sample guarantees killing of harmful germs and bacteria. In this paper, a new high ... -
A High-Availability Data Collection Scheme based on Multi-AUVs for Underwater Sensor Networks
( Institute of Electrical and Electronics Engineers Inc. , 2020 , Article)In this paper, a high-availability data collection scheme based on multiple autonomous underwater vehicles (AUVs) (HAMA) is proposed to improve the performance of the sensor network and guarantee the high availability of ... -
High-frequency viscoelastic measurements of fluids based on microcantilever sensing: New modeling and experimental issues
( Elsevier , 2013 , Article)In general, microrheology is carried out using active or passive particle-tracking techniques. In the present paper, a novel technique based on the out-of-plane bending vibrations of a microcantilever beam immersed into a ... -
High-gain DC-DC converters for high-power PV applications: Performance assessment
( Institute of Electrical and Electronics Engineers Inc. , 2018 , Conference Paper)Conventional non-isolated DC-DC converters provide limited practical gains at high duty cycles due to their parasitic losses. Such trend is not suitable for renewables grid integration due to the high required gain, while ... -
High-Gain Non-isolated Single-Switch DC-DC Converters in Power Factor Correction Rectifiers: A Performance Assessment
( IEEE , 2022 , Conference Paper)Conventional single-stage Power Factor Correction (PFC) rectifiers struggle with extreme duty ratio operation for low-voltage applications, like Low-speed Electric Vehicles (LSEV). This worsens the performance of the ... -
High-intensity exercise training does not influence body weight but improves lipid oxidation in obese adults: A 6-week RCT
( BMJ Publishing Group , 2017 , Article)Objectives This study examined the effects of 6 weeks of high-intensity training (HIT) on lipid oxidation (LO) rates during incremental exercises in obese adults. Methods Twenty-four obese adults were randomised into a ... -
High-intensity interval training improves acute plasma volume responses to exercise that is age dependent
( American Physiological Society , 2018 , Article)Plasma volume (PV) is affected by several factors including age, physical training and, acutely, by exercise intensity. The purpose of this study was to investigate the effects of 6 weeks of high-intensity interval training ... -
High-performance adaptive Perturb and observe MPPT technique for photovoltaic-based microgrids
( IEEE , 2011 , Article)Solar photovoltaic (PV) energy has witnessed double-digit growth in the past decade. The penetration of PV systems as distributed generators in low-voltage grids has also seen significant attention. In addition, the need ...