Qatar University Institutional Repository: Recent submissions
Now showing items 861-880 of 28761
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Assessment of potential ecological risk of microplastics in the coastal sediments of India: A meta-analysis
( Elsevier Ltd , 2021 , Article)Abundance, chemical composition and ecological risk of microplastics (MPs) in terrestrial and marine environments have merited substantial attention from the research communities. This is the first attempt to comprehend ... -
Recent developments in analytical methods for the assessment of microplastic contamination in the groundwater
( Elsevier , 2022 , Book chapter)Groundwater is the most important source of available freshwater used by more than 2 billion people around the world. Microplastics (MPs) is one of the emerging contaminants in the groundwater. There are several studies ... -
Seasonal variation and spatial distribution of microplastic pellets and their associated contaminants along the central east coast of India
( Springer Science and Business Media Deutschland GmbH , 2023 , Article)Microplastic pellets (MPPs) are one of the significant sources of plastic pollution on shorelines worldwide. In this study, for the first time, we have examined the occurrence of MPPs and their spatial and seasonal ... -
PAHs and hopanes in the surface sediments of Qatar coast and their ecological risks: Comparison with regional and global coastal regions
( Elsevier Ltd , 2024 , Article)The distribution, characteristics, sources and ecological risks of polycyclic aromatic hydrocarbons (PAHs) and hopanes in the surface sediments collected along the Qatar coast were investigated. Concentration of ∑14PAHs ... -
A comprehensive review of urban microplastic pollution sources, environment and human health impacts, and regulatory efforts
( Elsevier B.V. , 2024 , Article)Microplastic (MP) pollution in urban environments is a pervasive and complex problem with significant environmental and human health implications. Although studies have been conducted on MP pollution in urban environments, ... -
The athlete’s heart: allometric considerations on published papers and relation to cardiovascular variables
( Springer Science and Business Media Deutschland GmbH , 2024 , Article)To evaluate the morphology of the “athlete’s heart”, left ventricular (LV) wall thickness (WT) and end-diastolic internal diameter (LVIDd) at rest were addressed in publications on skiers, rowers, swimmers, cyclists, ... -
Triple-Switch DC-to-DC Converter for High-Voltage Boost Application-Revista
( Springer Science and Business Media Deutschland GmbH , 2021 , Conference Paper)The presented manuscript gives a comparison of the recently proposed three-switch three-mode (TSTM-HS) and dual-duty three-mode (DDTM) DC-to-DC converters. DC microgrid is the easiest, fail-safe, economical, expandable, ... -
A Multi-Input Multi-Output Model Predictive Direct Torque Control for Dual Mechanical Port Machine
( IEEE , 2023 , Article)In this paper, a multi-input multi-output (MIMO) model predictive direct torque control (MPDTC) strategy for a dual mechanical port machine (DMPM) is proposed. A MIMO state space model is developed, incorporating the ... -
Preventive and corrective open access system dispatch based on the voltage stability security assessment and diagnosis
( Elsevier , 2001 , Article)The capabilities of the voltage stability security assessment (VSSAD) to assess proximity to and ranking voltage instability by (a) performing a contingency selection of each model determined subsystem and (b) diagnosing ... -
A New High Gain Active Switched Network-Based Boost Converter for DC Microgrid Application
( IEEE , 2021 , Article)This paper deals with an active switched inductor network-based high gain boost converter. By using less number of components in circuit topology, a higher gain in voltage can be attained at a small duty cycle value by ... -
FACTS control devices (Statcom, SSSC and UPFC) re-configuration techniques by PSIM/MATLAB
( IEEE , 2007 , Conference Paper)This paper discusses comprehensively the dynamic performance of the FACTS control devices in multiple operations, hardware needed to complement the simulated models. This paper also presents the schematic and basic control ... -
Analog testing using Zero-Crossing technique
( IEEE , 2002 , Conference Paper)The functional digital testing is defined as a black and white test according to N. Nagi et al.(1998) and B. Vinnakota(1998) by other words, it can determine faulty and non faulty boards. But the analog faults are not. The ... -
MultiResUNet3+: A Full-Scale Connected Multi-Residual UNet Model to Denoise Electrooculogram and Electromyogram Artifacts from Corrupted Electroencephalogram Signals
( MDPI , 2023 , Article)Electroencephalogram (EEG) signals immensely suffer from several physiological artifacts, including electrooculogram (EOG), electromyogram (EMG), and electrocardiogram (ECG) artifacts, which must be removed to ensure EEG's ... -
Control of a Linear Switched Reluctance Motor in Electric Train Application
( IEEE , 2023 , Conference Paper)Linear electrical motors are good candidates for the industries with linear motion. The use of rotational electrical motors in linear movements, require additional mechanical converters, which in addition to reducing system ... -
GearFaultNet: Novel Network for Automatic and Early Detection of Gearbox Faults
( IEEE , 2024 , Article)Electrical and mechanical equipment with rotating parts often face the challenge of early breakdown due to defects in the gears or rolling bearings. Automated industrial systems can be significantly impeded by this type ... -
Restoration of motion-corrupted EEG signals using attention-guided operational CycleGAN
( Elsevier , 2024 , Article)Electroencephalogram (EEG) signals suffer substantially from motion artifacts even in ambulatory settings. Signal processing techniques for removing motion artifacts from EEG signals have limitations, and the potential of ... -
Reducing Force Ripples and Enhancing Reliability in LSRMs Through Modern Structure and Advanced Control Systems
( IEEE , 2024 , Article)Linear switched reluctance motors (LSRMs) are highly popular due to their simple and robust structure, affordable pricing, and ability to operate at high efficiency. However, a major drawback of these motors is the high ... -
Comparing levels of metabolic predictors of coronary heart disease between healthy lean and overweight females
( MDPI AG , 2021 , Article)Screening for the metabolomic signature of coronary heart disease (CHD) before disease onset could help in early diagnosis and potentially disease prevention. In this study, the levels of 17 CHD metabolic biomarkers in ... -
Associations between perceived occupational stressors and symptoms severity of depression, anxiety and stress among academic faculty: First cross-sectional study from Qatar
( BioMed Central Ltd , 2024 , Article)Background: Mental health concerns among university faculty are on the rise, with reports of anxiety, depression, and occupational stress, impacting the higher education community. In Qatar, an assessment of faculty mental ... -
Neuronal diversity in the caudate nucleus: A comparative study between camel and human brains.
( Wiley , 2024 , Article)Caudate nucleus (CN) neurons in camels and humans were examined using modified Golgi impregnation methods. Neurons were classified based on soma morphology, dendritic characteristics, and spine distribution. Three primary ...
