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السجلات المعروضة 26741 -- 26760 من 51547
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Underwater friction stir welding of Al-Mg alloy: Thermo-mechanical modeling and validation
( Elsevier , 2021 , Article)The aim of this article is the in-depth analysis of material behavior during underwater friction stir welding (UFSW) of Al-Mg alloy. A thermo-mechanical model was employed to find the relation between physical changes ... -
Undetectable Cyber Attacks on Communication Links in Multi-Agent Cyber-Physical Systems
( Institute of Electrical and Electronics Engineers Inc. , 2020 , Conference Paper)The objective in this paper is to study and develop conditions for a network of multi-agent cyber-physical systems (MAS) where a malicious adversary can utilize vulnerabilities in order to ensure and maintain cyber attacks ... -
Undoing Babel: The tower of Babel in Anglo-Saxon literature
( University of Toronto Press , 2018 , Book)The Tower of Babel narrative is one of the most memorable accounts of the Bible, and its interpretative potential has produced a vast array of literary adaptations. Undoing Babel is the first extensive examination of the ... -
Undrained interface shear strength of fine-grained soils for near-shore marine pipelines
( ASTM International , 2020 , Article)The peak and residual interface shear strengths for a variety of normally consolidated soils were measured using a torsional ring shear apparatus modified to suit soil and interface testing under the undrained condition, ... -
UNESCO on Al Bairaq World
( Qatar University , 2012 , Video) -
Unexpected adrenal pheochromocytoma associated with a generalized tonic-clonic seizure in a prepubertal boy: A case report.
( Lippincott, Williams & Wilkins , 2021 , Article)Pheochromocytoma (PHEO) is a rare neuroendocrine tumor arising from chromaffin cells of the adrenal medulla. Most pediatric PHEOs are functional tumors, and clinical manifestations are related to catecholamine hypersecretion ... -
Unexpected presentation of ischemic colitis: a case report and review of the literature.
( Oxford University Press , 2023 , Other)Ischemic colitis accounts for many cases of bowel infarction. Usually, it has various manifestations, such as vomiting, abdominal pain, hematochezia and many other symptoms. Risk factors might include age, medications, ... -
Unfair Payment Issues in Construction: Re-Thinking Alternative Payment Method For Tier-1 Contractors to Subcontractors
( Qatar Univesrity Press , 2020 , Conference Paper)Recent statistics reveal substantial increase in late payments cases from 18% to 27%; with over £30 billion unpaid invoices to UK contractors. Furthermore, 82% of overdue invoices are monies owed to subcontractor by tier-1 ... -
Unfolding jellyfish bloom dynamics along the mediterranean basin by transnational citizen science initiatives
( MDPI AG , 2021 , Article)Science is addressing global societal challenges, and due to limitations in research financing, scientists are turning to the public at large to jointly tackle specific environmental issues. Citizens are therefore increasingly ... -
Unified energy management and load control in building equipped with wind-solar-battery incorporating electric and hydrogen vehicles under both connected to the grid and islanding modes
( Elsevier Ltd , 2019 , Article)This paper presents a unified model for home energy management. The proposed model optimizes the cogeneration of wind, solar, and battery storage units. The introduced tool considers electric and hydrogen vehicles and ... -
A unified framework for bias assessment in clinical research
( Lippincott, Williams & Wilkins , 2019 , Article)Methodological flaws, limitations, and inadequate practices in research are well known and pose threats to the internal validity of any research study. However, there are ways of safeguarding research conduct to reduce the ... -
Unified Performance Analysis for Multiuser Mixed η - μ and M - Distribution Dual-Hop RF/FSO Systems
( Institute of Electrical and Electronics Engineers Inc. , 2017 , Article)A mixed free-space optical (FSO) communication scheme is considered with the help of a fixed gain relay. We assume that the links from the source to the relay are radio frequency links with multiuser diversity operating ... -
Unified power flow controller for low voltage ride through capability of wind-based renewable energy grid-connected systems
( IEEE , 2011 , Conference Paper)Due to the large increase in number of installed high power renewable energy generating systems such as wind energy power plants, one of the important evolving requirement is riding through the fault at low or zero voltage. ... -
Uniform fractional factorial design tables for energy piles with maximum thermal conductance
( WITPress , 2017 , Conference Paper)Energy Piles are the heat exchangers of Ground Source Heat Pumps (GSHP) that transfer the buildings heat to the lower temperature shallow ground reducing the energy consumption in the cooling of buildings. These piles are ... -
Uniform Ordered Two-Dimensional Mesoporous TiO2 Nanosheets from Hydrothermal-Induced Solvent-Confined Monomicelle Assembly
( American Chemical Society , 2018 , Article)Two-dimensional (2D) nanomaterials have been the focus of substantial research interest recently owing to their fascinating and excellent properties. However, 2D porous materials have remained quite rare due to the difficulty ... -
Unifying the diagnosis of gestational diabetes mellitus: Introducing the NPRP criteria
( Elsevier , 2021 , Article)AimsDisagreement about the appropriate criteria for the diagnosis of gestational diabetes mellitus (GDM) persists. This study examines an alternative approach which combines information from all time-points on the glucose ... -
Unipolar Single Reference Multicarrier Sinusoidal Pulse Width Modulation Based 7-level Inverter with Reduced Number of Semiconductor Switches for Renewable Energy Applications
( Institute of Electrical and Electronics Engineers Inc. , 2018 , Conference Paper)In the present scenario of increasing power demand and depletion of fossil fuel results in the research advancements in the field of renewable energy sources. Among various types of renewable energy sources, photovoltaic ... -
Unique associations of the Job Demand-Control-Support model subscales with leisure-time physical activity and dietary energy intake
( National Institute of Occupational Safety and Health , 2018 , Article)Leisure-time physical activity (LTPA) and dietary energy intake are two important health behaviours, which at too low or high levels respectively, are associated with overweight and obesity. This study explores associations ... -
Unique Structural Design and Construction Challenges for Al Bustan South Project in Qatar
( Qatar Univesrity Press , 2020 , Conference Paper)The Al Bustan Street South (ABS) Expressway Project features the longest dual carriageway bridges in Qatar spanning 2.6 km each, with a minimum of four lanes in each direction from south of Al Waab Street to south of Rayyan ... -
Unit of Technology Innovation and Engineering Education كلية الهندسة وحدة الابتكار التكنولوجي والت
( Qatar University , 2021 , Video)
