Browsing Academic by Title
Now showing items 4621-4640 of 25319
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Contribution of the Zubair source rocks to the generation and expulsion of oil to the reservoirs of the Mesopotamian Basin, Southern Iraq
( Taylor & Francis , 2019 , Article)The huge quantities of oil and gas reserved in the fields of southern Iraq must be matched by enough source rocks that can generate and expel equivalent amounts of hydrocarbons. This study is an attempt to evaluate the ... -
The Contribution Of Toll-Like Receptors In The Pathogenesis Of Diabetic Retinopathy In Human Microvascular Retinal Endothelial Cells In Vitro
(2016 , Master Thesis)Background: Diabetes Mellitus is a chronic systemic inflammatory disease including the eye causing macrovascular as well as microvascular complications known as diabetic retinopathy (DR), thus increasing the risk of vision ... -
Contribution of Water Scarcity and Sustainability Failures to Disintegration and Conflict in the Arab Region-The Case of Syria and Yemen
( Springer;Palgrave Macmillan, Cham , 2020 , Book chapter)Economic growth and demographic change are leading factors that impact the availability of resources such as water and arable land in countries around the globe. The case of Arab countries, where both these resources have ... -
Contribution To The Sedimentology Of The Bahariya Formation Of Gebel El-Dist, Bahariya Oasis, Western Desert, Egypt
( Qatar University , 1983 , Article)Combined microscopic, grain-size and heavy-mineral analyses were carried out on the Bahariya Formation at Gebel El-Dist (type section), Bahariya Oasis. These studies revealed that the formation is composed of moderately ... -
Contributions of competition based complex engineering design experience to leadership development in engineering students
( American Society for Engineering Education , 2015 , Conference Paper)Engineering design activities provide students an opportunity to develop a number of skills. Engineering design experiences not only help students to acquire practical or technical skills, but also may enhance a number of ... -
Contributions of flipped classroom method to student learning
( IGI Global , 2020 , Article)Educational institutions are striving for new methods for effective teaching. Flipped classroom (FC) method is one of the new trends spreading in higher education and attracting more instructors. This study aims at exploring ... -
Contributions of Fourier transform infrared spectroscopy in microplastic pollution research: A review
( Taylor and Francis , 2020 , Article)© 2020 Taylor & Francis Group, LLC. Fourier transform infrared (FTIR) spectroscopy has been extensively used in microplastic (MP) pollution research since 2004. The aim of this review is to discuss and highlight the ... -
Contributions to The Ionosphere Disturbances Investigations by GNSS Data Due to Natural and Anthropogenic Hazards
( Qatar University Young Scientists Center - Qatar University , 2024 , Conference Paper)Satellite communication and navigation systems can substantially be perturbed by ionospheric disturbances. Consequently, investigating ionospheric anomalous has great significance. In this work, we focus on the short-term ... -
Control Algorithms Of Digital Automatic Voltage Regulators For Synchronous Generators
( Qatar University , 1990 , Article)The main concepts of the application of digital controllers to a power system as automatic voltage regulators are presented in this paper. An experimental study using a physical model of a limited size power system has ... -
Control and modulation of three to asymmetrical six-phase matrix converters based on space vectors
( Korean Institute of Power Electronics , 2019 , Article)This paper proposes the modulation and control of a three-to-six-phase matrix converter with an asymmetrical six-phase output. The matrix converter (MC) outputs consist of two sets of three-phase spatially shifted by 300, ... -
Control Barrier Function-based Lateral Control of Autonomous Vehicle for Roundabout Crossing
( Institute of Electrical and Electronics Engineers Inc. , 2021 , Conference Paper)A lateral control scheme is presented to control Autonomous Vehicles (AVs) utilizing the nonlinear dynamics of the vehicle, based on the concepts of Control Lyapunov Functions (CLFs) to enforce stability and High Order ... -
Control charts for variability monitoring in high-dimensional processes
( Elsevier Ltd , 2019 , Article)Monitoring process variability is associated with detecting changes in the covariance matrix of a multivariate normal process. Most monitoring methods estimate the sample covariance matrix and compare it with the in-control ... -
Control mechanisms employed between headquarters and subsidiaries in Multinational Enterprises (MNEs): An empirical study
( Emerald Group Publishing Ltd. , 2016 , Article)Purpose: This study aims to investigated the control mechanisms of headquarters exercised over their subsidiaries and is conducted with the help of primary data. Design/methodology/approach: The headquarters-subsidiary ... -
Control mechanisms of MNEs: an empirical study
( Emerald Group Publishing Ltd. , 2016 , Article)Purpose: This purpose of this paper is to explore variations in the extent of control mechanisms, according to country of origin and organizational characteristics, in a challenging country of domicile. Design/methodolog ... -
Control Methods for Minimizing Cross Regulation in Single Inductor Multiple Output Converters : A Review
( Springer , 2020 , Conference Paper)Single Inductor Multiple Output (SIMO) converter provides a cost-effective alternative to conventional power converters, which have more than one output. Its potential applications include portable devices, where multiple ... -
Control of contagious bovine pleuropneumonia: Knowledge, attitudes, perceptions and practices in Narok district of Kenya
( Elsevier , 2014 , Article)CBPP is an important transboundary disease in sub-Saharan Africa whose control is urgent. Participatory data collection involving 52 focus group discussions in 37 village clusters and key informant interviews, a cross-sectional ... -
Control of doubly-fed induction machine storage system for constant charging/discharging grid power using artificial neural network
( IET , 2012 , Conference Paper)A large-capacity low-speed flywheel energy storage system based on a doubly-fed induction machine (DFIM) basically consists of a wound-rotor induction machine, and a back-to-back converter for rotor excitation. It has been ... -
Control of High Gain Modified SEPIC Converter: A Constant Switching Frequency Modulation Sliding Mode Controlling Technique
( Institute of Electrical and Electronics Engineers Inc. , 2018 , Conference Paper)This paper investigates, analyses and presents a control scheme for a modified SEPIC converter. High voltage conversion ratio is accomplished by using fewer passive components. The modified SEPIC converter is a combination ... -
Control Of Packed U-cell Multilevel Five-phase Voltage Source Inverter
( Hamad bin Khalifa University Press (HBKU Press) , 2014 , Conference Paper)A seven level five-phase voltage source inverter with packed U-cell topology is presented in this paper. This is called Packed U-cell because each unit of the inverter is of shape U. Fig. 1 presents a five-phase seven-level ... -
Control of parabolic PDEs with time-varying spatial domain: Czochralski crystal growth process
( Taylor and Francis Ltd. , 2013 , Article)This paper considers the optimal control problem for a class of convection-diffusion-reaction systems modelled by partial differential equations (PDEs) defined on time-varying spatial domains. The class of PDEs is characterised ...