Browsing College of Engineering by Title
Now showing items 7639-7658 of 7741
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Visualizing electricity consumption in Qatar
( Springer Verlag , 2016 , Conference Paper)Data related to electricity consumption is a global problem, particularly here in Qatar. Thus, a customized tool to analyze this data is made. The aim of this research is to present a new software, which would help the ... -
Vitamin K1 as a potential molecule for reducing single-walled carbon nanotubes-stimulated �-synuclein structural changes and cytotoxicity
( Dove Medical Press Ltd. , 2019 , Article)Aims: Different kinds of vitamins can be used as promising candidates to mitigate the structural changes of proteins and associated cytotoxicity stimulated by NPs. Therefore, the structural changes of �-syn molecules and ... -
Voltage and congestion control in active distribution networks using fast sensitivity analysis
( Institute of Electrical and Electronics Engineers Inc. , 2020 , Conference Paper)Active distribution networks will meet new challenges in voltage and congestion control due to the high penetration levels of distributed generations (DG). Optimal voltage control techniques are mainly based on the relation ... -
Voltage control in distribution networks using current source converter STATCOM based on state feedback controller and Kalman filter
( Institute of Electrical and Electronics Engineers Inc. , 2018 , Conference Paper)In transmission and Medium-Voltage (MV) distribution systems, the voltage can be controlled by reactive power due to the high X/R ratio of the cables/overhead lines. Maintaining voltage within a fixed limit is critical to ... -
Voltage Independent Reactive Current Based Sensor for Static VAr Control Applications
( Institute of Electrical and Electronics Engineers Inc. , 2023 , Article)The use of renewable energy-based converters is continuously increasing in modern power systems which inject voltage harmonics in the line. In this work, a novel, simple technique based on a binary (on/off) control of an ... -
Voltage Profiling and Control of a Sub-Transmission Network with Integrated Renewable Energy Sources-A Case Study
( Institute of Electrical and Electronics Engineers Inc. , 2021 , Conference Paper)Traditional power generation methods are causing environmental issues. Some of the other drawbacks like line loading will increase the losses and the response time will be very high, which cannot be supporting the future ... -
Voltage sag mitigation employing dynamic voltage restorer with minimum energy requirements: Analysis and implementation
( Institution of Engineering and Technology , 2016 , Conference Paper)The objective of this paper is to design and implement an economical and efficient single phase dynamic voltage restorer (DVR) that compensates for voltage sag conditions. In this paper, different techniques of voltage sag ... -
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/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 ... -
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 ... -
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 ... -
Walsh transform with moving average filtering for data compression in wireless sensor networks
( Institute of Electrical and Electronics Engineers Inc. , 2017 , Conference Paper)Due to the peculiarity of wireless sensor networks (WSNs), where a group of sensors continuously transmit data to other sensors or to the fusion center, it is crucial to compress the transmitted data in order to save the ... -
Warming impact on energy use of HVAC system in buildings of different thermal qualities and in different climates
( Elsevier Ltd , 2014 , Article)In order to combat climate change, energy use in the building must be further reduced. Heating ventilation and air conditioning (HVAC) systems in residential buildings account for considerable fraction of global energy ... -
Water harvesting cube
( Springer Nature , 2019 , Article)Water scarcity is at the center of the world's greatest challenges, including famine, disease, and sustainable development. In many countries, there are active researches aimed at improving the supply of fresh water through ... -
Watermain Breaks in Hong Kong: Causes and Consequences
( Qatar University Press , 2023 , Conference Paper)Watermain failure is a complex problem associated with significant socio-economic and environmental impacts. The complexity of this problem originates from many factors of physical, operational, and environmental nature. ... -
Wave propagation analysis of porous functionally graded curved beams in the thermal environment
( Techno-Press , 2021 , Article)In the present paper, wave propagation behavior of porous temperature-dependent functionally graded curved beams within the thermal environment is analyzed for the first time. A recently-developed method is utilized which ...