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السجلات المعروضة 5360 -- 5379 من 50233
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Comparative analysis of carrier schemes for PWM in multilevel PUC inverter for PV applications
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)This paper presents an evaluation of two modulation methods for the seven-level packed U cell (PUC) inverter for photovoltaic applications. The PUC is a multilevel inverter which has less number of switching devices than ... -
Comparative analysis of computer-vision and BLE technology based indoor navigation systems for people with visual impairments
( BioMed Central Ltd. , 2019 , Article)Background: Considerable number of indoor navigation systems has been proposed to augment people with visual impairments (VI) about their surroundings. These systems leverage several technologies, such as computer-vision, ... -
Comparative Analysis of Physical Activity, Performance-Related Health, and Academic Achievements in 11-to-13-Year-Old Schoolchildren in Qatar
( MDPI , 2024 , Article)Age-related differences in physical activity (PA), maturity status (PHV), physical performance (PP), and academic achievement (AA) among schoolchildren in Qatar were examined. Sixty-nine students from a school in Doha were ... -
Comparative analysis of sustainable desiccant – Evaporative based ventilation systems for a typical Qatari poultry house
( Elsevier Ltd , 2021 , Article)Direct evaporative cooling is the typically adopted ventilation system in poultry houses in hot climates. This type of cooling is inefficient during period of relatively high humidity resulting in degraded thermal comfort ... -
Comparative analysis of the use of flash evaporator and solar still with a solar desalination system
( Taylor and Francis Ltd. , 2020 , Article)The present research paper shows the use of a flash evaporator coupled with the solar desalination system to improve the distillate output. Here solar desalination system consists of a solar water heater coupled with ... -
Comparative analysis of three-phase to five-phase transformer connections
( Taylor and Francis Ltd. , 2017 , Article)Five-phase supply is needed for supplying five-phase motor drive systems. Special transformer connection schemes have been developed over the years and reported in the literature to convert three-phase supply from the grid ... -
Comparative analysis of within-host diversity among vaccinated COVID-19 patients infected with different SARS-CoV-2 variants
( Elsevier , 2022 , Article)Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is a rapidly evolving RNA virus that mutates within hosts and exists as viral quasispecies. Here, we evaluated the within-host diversity among vaccinated and ... -
Comparative assessment of fracture risk among osteoporosis and osteopenia patients: a cross-sectional study
( Dove Medical Press , 2018 , Article)Background: Both osteoporosis and osteopenia remain worldwide public health concerns. They both lead to bone fractures, which can lead to disability and burden on those who are afflicted. Objectives: To assess and compare ... -
A comparative assessment of housing dynamics In Abu Dhabi and Doha
( Archnet-IJAR , 2016 , Article)Abu Dhabi and Doha have evolved rapidly in the twentieth century due to the investment of oil and gas revenues. The fast economic growth resulted in an extensive period of urbanization. The various urban dynamics had a ... -
A Comparative Assessment of Quality Management Practices in Manufacturing Firms and Service Firms: A Repeated Cross-Sectional Analysis
( IEEE , 2022 , Article)There are significant structural differences between the manufacturing and service sectors at the firm level, but quality management research has not yet identified similarities or differences in the quality management ... -
A comparative assessment of the amount and rate of orthodontic space closure toward a healed vs recent lower premolar extraction site.
( EH ANGLE ORTHODONTISTS RESEARCH & EDUCATION FOUNDATION, INC. , 2022 , Article)To investigate and compare the amount and rate of space closure and tooth tipping during orthodontic space closure toward a recent vs healed first premolar extraction site. The mandibular arches of 23 patients were included. ... -
A comparative assessment of the role of energy in Qatar's East Asian foreign relations: case studies on China, Japan and South Korea
(2017 , Master Thesis)Energy is an important factor in international relations and recently the global energy paradigm has been seen to be shifting towards the East. In light of such change, a comparative assessment of the role of energy in ... -
Comparative Assessment of Toxic Metals Bioaccumulation and the Mechanisms of Chromium (Cr) Tolerance and Uptake in Calotropis procera
( Frontiers Media S.A. , 2020 , Article)Progressive pollution due to toxic metals significantly undermines global environmental sustainability efforts. Chromium (Cr) is one of the most dangerous to human health. The use of plants to rid the environment of such ... -
A comparative assessment on life cycle analysis of the biodiesel fuels produced from soybean, Jatropha, Calophyllum inophyllum, and microalgae
( Uppalapati, S., Jani, S. P., Khan, M. B. A., Alagarsamy, M., Manoharan, M., Panchal, H., & Sadasivuni, K. K. (2022). A comparative assessment on life cycle analysis of the biodiesel fuels produced from soybean, Jatropha, Calophyllum inophyllum, and microalgae. Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 44(2), 3253-3272. , 2022 , Article)There is a continuous depletion of fossil resources recorded in 20th century for the production of diesel that resulted in significant climatic change. The current study focuses on the challenges faced due to energy crisis ... -
Comparative Characterization of Field and Laboratory-Aged Binders Modified with Antioxidant Additives and Copolymers Using Fourier Transform Infrared Spectroscopy and Gel Permeation Chromatography
( American Society of Civil Engineers (ASCE) , 2022 , Article)This study investigates the behavior of antioxidant additives and copolymers to an asphalt binder by comparing laboratory-aged (up to 60 h) and antioxidant-modified binders with binders extracted from field cores. To ... -
Comparative chloroplast genomics of endangered euphorbia species: Insights into hotspot divergence, repetitive sequence variation, and phylogeny
( Multidisciplinary Digital Publishing Institute (MDPI) , 2020 , Article)Euphorbia is one of the largest genera in the Euphorbiaceae family, comprising 2000 species possessing commercial, medicinal, and ornamental importance. However, there are very little data available on their molecular ... -
A comparative computational approach toward pharmacological chaperones (NN-DNJ and ambroxol) on N370S and L444P mutations causing Gaucher's disease.
( Elsevier , 2019 , Book chapter)Gaucher's disease (GD) is the most commonly known lysosomal disorder that occurs due to mutations in the β-glucocerebrosidase (GBA) protein. Our previous findings (Thirumal Kumar, Eldous, Mahgoub, George Priya Doss, Zayed, ... -
Comparative computational assessment of the pathogenicity of mutations in the Aspartoacylase enzyme
( Springer US , 2017 , Article)Aspartoacylase (ASPA) is a zinc-dependent abundant enzyme in the brain, which catalyzes the conversion of N-acetyl aspartate (NAA) into acetate and aspartate. Mutations in the ASPA gene are associated with the development ... -
Comparative Development Studies On The Lateral Canal System In Cyprinus Carpio And Gambusia Affinis Affinis
( Qatar University , 1990 , Article)The lateral line canals and the neuromasts situated inside their lumina are described in two fishes differing in their feeding habits. There are 20 canal neuromasts in the bottom feeder Cyprinus carpio, while in the surface ... -
Comparative effectiveness and safety of direct oral anticoagulants compared to warfarin in morbidly obese patients with acute venous thromboembolism: systematic review and a meta-analysis
( Springer , 2021 , Article)Direct oral anticoagulant (DOAC) agents are becoming the anticoagulation strategy of choice. However, their use in the treatment of acute venous thromboembolism (VTE) in morbidly obese patients (bodyweight of > 120 kg or ...
