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Now showing items 18005-18024 of 49774
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On the Performance of Hadamard Ratio Detector-Based Spectrum Sensing for Cognitive Radios
( Institute of Electrical and Electronics Engineers Inc. , 2015 , Article)We consider the problem of multiantenna spectrum sensing (SS) in cognitive radios (CRs) when the receivers are assumed to be uncalibrated across the antennas. The performance of the Hadamard Ratio Detector (HRD) is analyzed ... -
On the performance of LAP-based multiple-hop RF/FSO systems
( Institute of Electrical and Electronics Engineers Inc. , 2019 , Article)In this paper, we propose a low-altitude aerial platform (LAP) based relaying system, where two LAPs serve as relays. More specifically, the air-to-ground links are assumed to be radio frequency (RF) channels experiencing ... -
On the Performance of Quickest Detection Spectrum Sensing: The Case of Cumulative Sum
( Institute of Electrical and Electronics Engineers Inc. , 2020 , Article)Quickest change detection (QCD) is a fundamental problem in many applications. Given a sequence of measurements that exhibits two different distributions around a certain flipping point, the goal is to detect the change ... -
On the Performance of RIS-Assisted Dual-Hop UAV Communication Systems
( Institute of Electrical and Electronics Engineers Inc. , 2020 , Article)In this paper, to further improve the coverage and performance of unmanned aerial vehicle (UAV) communication systems, we propose a reconfigurable intelligent surface (RIS)-assisted UAV scheme where an RIS installed on a ... -
On the performance of spectrum sensing based on GLR for full-duplex cognitive radio networks
( Institute of Electrical and Electronics Engineers Inc. , 2016 , Conference Paper)In cognitive radio networks, secondary users (SUs) utilize the unused spectrum slots in the assigned band for the primary users (PUs). Conventional cognitive radio networks operate in half-duplex (HD) mode. Recently, ... -
On the Performance of Tactical Communication Interception Using Military Full Duplex Radios
( Institute of Electrical and Electronics Engineers Inc. , 2019 , Conference Paper)Advances in the design of Full-Duplex (FD) transceivers with low residual Self-Interference (SI) levels has led to their deployment in various wireless communication applications. One promising field that FD transceivers ... -
On the power efficiency for cognitive radio networks with multiple relays
( IEEE , 2014 , Conference Paper)In this paper, we study and analyze cooperative cognitive radio networks with multiple secondary users (SUs). Each SU is considered a prospective relay for the primary user (PU) besides having its own data demand. The ... -
On The Prawn Fisheries in the Gulf of Suez, Egypt
( Qatar University , 1993 , Article)Prawn fisheries in the Gulf of Suez constitute about 13.7% of the total fish and shrimp landings. About 11% are made up by three penaeid species namely: Penaeus japonicus Bate, Penaeus semisulcatus De Han and Penaeus ... -
On the Prediction of the Flow Behavior of Metals and Alloys at a Wide Range of Temperatures and Strain Rates Using Johnson-Cook and Modified Johnson-Cook-Based Models: A Review
( MDPI , 2023 , Article Review)This paper reviews the flow behavior and mathematical modeling of various metals and alloys at a wide range of temperatures and strain rates. Furthermore, it discusses the effects of strain rate and temperature on flow ... -
ON THE PREFERENCE OF ZERO-INFLATION MODELS WITH THE PRESENCE OF DATA CONTAMINATION
(2023 , Master Thesis)Nowadays, data has become a big concern for researchers to solve problems or improve a lifestyle. It is not odd that different data sources generate data with different characters. In fields such as engineering, epidemiology, ... -
On the preparation of electron sensor using LiRbSO4 samples
( WILEY-VCH Verlag GmbH & Co. , 2005 , Article)The dielectric spectroscopy of metal�metal sulfate LiRbSO4 samples are described with particular emphasis on sensor performance to be used in the field of radiation. The obtained results as the effect of different electron ... -
On the Propagation of Elastic-plastic Wave in the Half Space
( Qatar University , 1981 , Article)The problem of the propagation of the elastic-plastic wave in the half-space occupied by and elastic-plastic medium has been studied. Treatments were carried out under the Assumption of perpendicular load, on the boundary, ... -
On the protection of power system: Transmission line fault analysis based on an optimal machine learning approach
( Elsevier Ltd , 2022 , Article)Transmission lines (TLs) of power networks are often encountered with a number of faults. To continue normal operation and reduce the damage due to the TL faults, it is a must to identify and classify faults as early as ... -
On the relation between internal corporate governance and bank risk-taking: evidence from gulf cooperative council countries
( Taiwan Institute of Business Administration , 2014 , Article)This study investigates the relationship between ownership structure, board composition and risk-taking of listed banking companies in the Gulf Cooperative Council (GCC) countries during 2004-2010. Building on limited ... -
On the relative efficiency of conventional and Islamic banks: a DEA-window approach
( Inderscience , 2013 , Article)This paper explores the relative efficiency of 65 conventional and Islamic banks in the Gulf Cooperation Council (GCC) region using the Data Envelopment Analysis (DEA) over the period from 2002 to 2010. The empirical results ... -
On the resilience of modern power systems: A comprehensive review from the cyber-physical perspective
( Elsevier Ltd , 2021 , Article)The digital transformation of power systems into cyber-physical systems (CPSs) is the inevitable trend of modern power systems with the integration of large-scale renewable energy. The in-depth interdependence of cyber and ... -
On the Role of Renewable Energy Policies and Electric Vehicle Deployment Incentives for a Greener Sector Coupling
( Institute of Electrical and Electronics Engineers Inc. , 2022 , Article)Various incentives are introduced for the expansion of electric vehicle fleets and electricity generation from renewable energy resources. Although many researchers studied the effect of these policies on the related sector, ... -
On the Roles and Interactions of the MMC Internal Energy Balancing Degrees of Freedom for Three-Wire Three-Phase Connections
( Institute of Electrical and Electronics Engineers Inc. , 2022 , Article)This paper proposes a comprehensive analysis of the Modular Multilevel Converter (MMC) focusing on the different arm applied voltage components, that this paper will refer as degrees of freedom (DOFs), which must be ... -
On the safe-haven and hedging properties of Bitcoin: new evidence from COVID-19 pandemic
( Emerald Publishing , 2022 , Article)Purpose: This study aims to investigate the safe-haven and hedging properties of Bitcoin against a wide variety of conventional assets before and during the coronavirus disease 2019 (COVID-19) pandemic. Design/methodolog ... -
On the sandpile model of modified wheels II
( De Gruyter Open Ltd , 2020 , Article): We investigate the abelian sandpile group on modified wheels Wˆn by using a variant of the dollar game as described in [N. L. Biggs, Chip-Firing and the critical group of a graph, J. Algebr. Comb. 9 (1999), 25–45]. The ...