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السجلات المعروضة 22239 -- 22258 من 26014
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Voltage sensorless current control of low power inverter-based distributed generation systems
( Institute of Electrical and Electronics Engineers Inc. , 2014 , Conference Paper)The control of power electronic converters is subjected to several challenges as measurement sensors drift, malfunction in harsh environments, non-ideal grid, and performance degradation due to the delay of discrete control ... -
Voltage stability evaluation of real power transmission system using singular value decomposition technique
( IEEE , 2008 , Conference Paper)Voltage stability is an important factor that needs to be taken into consideration during the planning and operation of power systems in order to avoid voltage collapse and subsequently partial or full system blackout. ... -
Voltage Stability Margin Identification Using Local Measurements And Linear Kalman Filter
( Qatar University , 2002 , Article)Voltage stability investigation is of a great importance for long-term electric load expansion as well as power system operation. This paper presents a new algorithm for identification of voltage instability in a specified ... -
Voltage/load Control Strategy for Smart Distribution Grids with a High Penetration of Renewable Energy Sources
( European Association for the Development of Renewable Energy, Environment and Power Quality (EA4EPQ) , 2016 , Article)The exponential increase of renewable energy sources (RESs) penetration in the power grid introduces the of voltage instability when RESs are integrated into medium and low voltage networks. This paper proposes a state-machine ... -
Voluntary disclosure in the annual reports of an emerging country: The case of Qatar
( Elsevier Ltd , 2009 , Article)This study sets out to examine empirically the determinants of voluntary disclosure in the annual reports of 25 listed firms of Doha Securities Market (DSM) in Qatar forming approximately 86% of the total firms incorporated ... -
Voluntary risk disclosure and values of FTSE350 firms: the role of an industry-based litigation risk
( Inderscience Publishers , 2021 , Article)There is conflicting research on whether litigation risk affects voluntary disclosure positively or negatively. This study thus aims to examine how litigation risk affects the voluntary disclosure of risk information. It ... -
Volunteers of Oman during the Corona Crisis: An Exploratory Study in the Sociology of Altruism
( Gulf Studies center - College of Arts & Sciences - Qatar University , 2020 , Conference Paper)Volunteering is a major aspect of contemporary globalized societies. It has long been an indicator for proper functioning of society at large. Further, it made notable difference for individuals, groups and organizations. ... -
VOPcPhO:P3HT composite micro-structures with nano-porous surface morphology
( Elsevier B.V. , 2017 , Article)In this paper, composite micro-structures of Vanadyl 2,9,16,23-tetraphenoxy-29H,31H-phthalocyanine) (VOPcPhO) and Poly (3-hexylthiophene-2,5-diyl) (P3HT) complex with nano-porous surface morphology have been developed by ... -
Vortex induced vibration energy harvesting using magnetically coupled broadband circular-array piezoelectric patch: Modelling, parametric study, and experiments
( Elsevier , 2023 , Article)Piezoelectric composites have become increasingly important in energy harvesting from vibration and, more recently, flow-induced vibration. The compatibility of piezoelectric devices has allowed tuning harvesters to the ... -
Voter's intention to use electronic voting systems
( IGI Global , 2017 , Article)Electronic government initiatives play a central role in opening doorsfor potential votersto participate in the political process by using electronic voting systems. Electronic voting is attracting more attention by ... -
A Voting-Mechanism-Based Ensemble Framework for Constraint Handling Techniques
( Institute of Electrical and Electronics Engineers Inc. , 2022 , Article)Effective constraint handling techniques (CHTs) are of great significance for evolutionary algorithms (EAs) dealing with constrained optimization problems (COPs). To date, many CHTs, such as penalty function, superiority ... -
The vowel system of Qatari Arabic: Evidence for peripheral/non-peripheral distinction between long and short vowels
( Cambridge University Press , 2023 , Article)Arabic has a vowel system with three long and three short monophthongs. One of the parameters that accounts for qualitative differences between long and short vowels across languages is tenseness/laxness of vowels located ... -
VRowser: A virtual reality parallel web browser
( Springer Verlag , 2018 , Conference Paper)In this paper, we propose VRowser, which is a virtual reality (VR) web browser that utilizes various visualization and interaction methods to support webpage content comparisons, allocation, grouping, and retrieval that ... -
Vulnerabilities and countermeasures in electrical substations
( Elsevier , 2021 , Article)The impending and continued threat of cyberattacks on modern utility grids has called for action from the different stakeholders of the electricity sector. This calls for a thorough investigation and review of the weaknesses ... -
Vulnerabilities and verification of cryptographic protocols and their future in Wireless Body Area Networks
( IEEE , 2012 , Conference Paper)In network security goals such as confidentiality, authentication, integrity and non-repudiation can be achieved using cryptographic techniques. Cryptographic techniques are techniques to hide information from unauthorized ... -
Vulnerabilities of the SARS-CoV-2 virus to proteotoxicity - opportunity for repurposed chemotherapy of COVID-19 infection
( Qatar University Press , 2020 , Poster)The global pandemic of COVID-19 disease caused by infection with the SARS-CoV-2 coronavirus, has produce an urgent requirement and search for improved treatments whilst effective vaccines are developed. A strategy for ... -
Vulnerabilities of the SARS-CoV-2 Virus to Proteotoxicity—Opportunity for Repurposed Chemotherapy of COVID-19 Infection
( Frontiers Media , 2020 , Article)The global pandemic of COVID-19 disease caused by infection with the SARS-CoV-2 coronavirus, has produced an urgent requirement and search for improved treatments while effective vaccines are developed. A strategy for ... -
Vulnerability and precarity of Palestinian women in the Naqab
( Taylor & Francis , 2021 , Article)Many studies have broadly addressed the status of the Naqab/Negev Bedouins in Israel, particularly the status of women. However, women from the West Bank and the Gaza Strip who are married to male Bedouin citizens of Israel ... -
Vulnerability of mangroves to sea level rise in Qatar: Assessment and identification of vulnerable mangroves areas
(2015 , Master Thesis)Qatar is one of few countries in Arabian Gulf where mangrove ecosystem exist. They are essential number of ecosystem function; however, this valuable ecosystem is threatened by both anthropogenic and global climatic ... -
Vulnerable newborn types: analysis of subnational, population-based birth cohorts for 541 285 live births in 23 countries, 2000–2021
( Wiley , 2023 , Article)Objective: To examine prevalence of novel newborn types among 541 285 live births in 23 countries from 2000 to 2021. Design: Descriptive multi-country secondary data analysis. Setting: Subnational, population-based birth ...
