Browsing Faculty Contributions by Title
Now showing items 4914-4933 of 17021
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Double switch two leg high gain boost converter for renewable energy applications in a DC microgrid
( Institute of Electrical and Electronics Engineers Inc. , 2020 , Conference Paper)The voltage output at the terminals of a DC generating source such as Photovoltaic and Fuel cells is not enough to be integrated with the DC bus of a microgrid. Therefore, an efficient DC-DC converter is demanded for ... -
The double-edged sword of social media usage during the COVID-19 pandemic: demographical and cultural analyses
( Emerald Publishing , 2022 , Article)Purpose: This exploratory research aims to (1) investigate the bright and dark sides of social media use during the COVID-19 pandemic; (2) explore the impact of demographic factors on social media usage; and (3) assess the ... -
Double-zero-event studies matter: A re-evaluation of physical distancing, face masks, and eye protection for preventing person-to-person transmission of COVID-19 and its policy impact
( Elsevier , 2021 , Other)In a recent timely systematic review, Chu et al. [1] assessed the effectiveness of face masks, eye protection, and physical distancing for preventing COVID-19. Because the sample sizes are not large, especially in some ... -
Doubly dual nature of ammonium-based ionic liquids for methane hydrates probed by rocking-rig assembly
( Royal Society of Chemistry , 2016 , Article)This work presents a systematic study of methane hydrate inhibition in the presence of five structurally variable ionic liquids (ILs) belonging to the ammonium family—viz., tetra-alkylammonium acetate (TMAA), choline ... -
Downpayment, mobility and default: A welfare analysis
( Elsevier Ltd , 2018 , Article)In this paper, I study the impact of the relaxation of downpayment requirements on home-ownership and default risk in the context of a static spatial life cycle model. Given its quantitative success in matching the U.S. ... -
DPSIR framework and sustainable approaches of brine management from seawater desalination plants in Qatar
( Elsevier , 2021 , Article)Brine released from desalination plants is extremely high in salinity and contains various chemicals, which are harmful to the ecosystem. The disposal of brine has raised great concerns for the desalination industry around ... -
DPSM technique for ultrasonic field modelling near fluid–solid interface
( Elsevier , 2007 , Article)Distributed point source method (DPSM) is gradually gaining popularity in the field of non-destructive evaluation (NDE). DPSM is a semi-analytical technique that can be used to calculate the ultrasonic fields produced by ... -
Drafting Human Trafficking Legislation: Binding Rules and Guiding Rules
( Carolina Academic Press , 2020 , Book chapter)In this article, I devote more focused and in-depth attention to a subject area that has not received the level of attention it deserves-the first topic, which distinguishes between binding conventions and soft principles ... -
Drained Peak and Residual Interface Shear Strengths of Fine-Grained Soils for Pipeline Geotechnics
( American Society of Civil Engineers (ASCE) , 2019 , Article)This study presents the results of interface torsional ring shear tests conducted at intermediate normal stress levels that are usually prevalent at soil-pipeline interfaces under near-shore conditions. Four normally ... -
Drained residual shear strength at effective normal stresses relevant to soil slope stability analyses
( Elsevier B.V. , 2016 , Article)An extensive torsional ring shear testing program has been conducted to measure the drained residual shear strength of soils at the wide range of effective normal stress (10 to 700 kPa) usually mobilized in reactivated and ... -
Drawing lessons from PISA: Qatar’s use of PISA results
( Springer , 2022 , Article)Worldwide, the Programme for International Student Assessment (PISA) has emerged as a valid and reliable benchmark for assessing students’ performance and for gaining significant influence over educational policy and ... -
Drift optimization of high-rise buildings in earthquake zones
( John Wiley & Sons, Ltd. , 2011 , Article)This paper presents a Drift Design Structural Model (DDSM) for the design optimization of high-rise buildings in seismic zones. The model is formulated as a Generalized Single Degree of Freedom System subjected to equivalent ... -
Drill string nonlinear vibrations: Experimental studies and finite-element analysis
( Institute of Physics Publishing , 2018 , Conference Paper)In the present work, nonlinear vibrations of drill strings are studied. A laboratory scale arrangement consisting of a flexible rod with rotor-stator system is used to study the system dynamics. A finite-element model has ... -
Drillstring Failure - Identification, Modeling, and Experimental Characterization
( American Society of Mechanical Engineers (ASME) , 2019 , Article)Drilling is one of the costliest and risky activities in oil and gas industry due to complexity of interactions with downhole formation. Under such conditions, the uncertainty of drillstring behavior increases, and hence, ... -
Drive-up INR testing and phone-based consultations service during COVID-19 pandemic in a pharmacist-lead anticoagulation clinic in Qatar: Monitoring, clinical, resource utilization, and patient- oriented outcomes
( Wiley , 2021 , Article)Background: Coronavirus disease 2019 (COVID-19) pandemic has resulted in unprecedented pressure on healthcare systems and led to widespread utilization of telemedicine or telehealth services. Combined with teleclinics, ... -
Driver activity recognition in virtual reality driving simulation
( Institute of Electrical and Electronics Engineers Inc. , 2017 , Conference Paper)In this research, we present the design of a driving seat with driver activities recognition based on a passive method for measuring body-postures by using two force sensor arrays to inspect the pressure patterns exhibited ... -
Driver Drowsiness Detection Study using Heart Rate Variability analysis in Virtual Reality Environment
( Hamad bin Khalifa University Press (HBKU Press) , 2018 , Conference Paper)Introduction Mobility and road safety is one of the grand challenges that Qatar is facing during the last decade. There are many ways to enhance the road safety. One way is to characterize the factors contributing to the ... -
Drivers for energy analysis towards a BIM-enabled information flow
( Emerald Publishing , 2023 , Article)Purpose: Energy analysis (EA) within a building information modelling (BIM) enables consistent data integration in central repositories and eases information exchange, reducing rework. However, data loss during information ... -
Drivers of employee entrepreneurial intention: a study of the oil and gas sector in Qatar
( Inderscience Publishers , 2023 , Article)Many employees are opting to start new businesses while working full-time for established firms. Although employee entrepreneurship has attracted much attention recently, very little is known on what motivates employees ... -
Drivers of snow leopard poaching and trade in Pakistan and implications for management
( Pensoft Publishers , 2022 , Article)The snow leopard is one of the highly valued species from high-altitude mountain ecosystems of Central and Southeast Asia, including Pakistan. This keystone species is facing a myriad of conventional and emerging threats, ...