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Browsing by Author "Hamam, Y"

Now showing items 3-22 of 43

Autonomous transmission power adaptation for multi-radio multi-channel wireless mesh networks

Author: Olwal, TO ; Van Wyk, BJ ; Djouani, K ; Hamam, Y ; Siarry, P ; Ntlatlapa, Ntsibane S Date: Sep 2009 Multi-Radio Multi-Channel (MRMC) systems are key to power control problems in WMNs. Previous studies have emphasized through- put maximization in such systems as the main design challenge and transmission power control treated as a secondary ... Read more
Burst leakage-pressure dependency in water piping networks: Its impact on leak openings

Author: Adedeji, KB ; Hamam, Y ; Abe, BT ; Abu-Mahfouz, Adnan MI Date: Sep 2017 In most water distribution systems, an appreciable volume of water is lost through leaking pipes, resulting in financial loss and environmental pollution among others. Thus, water loss constitutes a major challenge to utilities around the ... Read more
Comparative study of graphene-polypyrrole and borophene-polypyrrole composites: Molecular dynamics modeling approach

Author: Folorunso, Oladipo ; Hamam, Y ; Sadiku, R ; Ray, Suprakas S ; Adekoya, GJ Date: 2021 In the search for the solution to energy storage problems, this study investigates the interfacial energy interaction and temperature stability of the composites made of polypyrrole-graphene-borophene (PPy-Gr-Bon) by using molecular dynamics ... Read more
Decentralized power control for multi-radio multi-channel wireless mesh networks

Author: Olwal, TO ; Van Wyk, BJ ; Djouani, K ; Hamam, Y ; Siarry, P ; Ntlatlapa, Ntsibane S Date: Sep 2010 Multi-Radio Multi-Channel (MRMC) WMNs result in power control problems including interference, un-scalable connectivity and energy consumption. Several previous studies have focused on the single radio wireless configurations while studying ... Read more
Dynamic power control for wireless backbone mesh networks: a survey

Author: Olwal, TO ; Van Wyk, BJ ; Ntlatlapa, Ntsibane S ; Djouani, K ; Siarry, P ; Hamam, Y Date: 2010 With the tremendous growth of wireless networks into the next generation to provide better services, Wireless Mesh Networks (WMNs) have emerged to offer ubiquitous communication and seamless broadband applications. WMNs are hybrid networks ... Read more
Effect of pipe materials on BLE using graph-based integrated hydraulic model

Author: Adedeji, KB ; Hamam, Y ; Abe, BT ; Abu-Mahfouz, Adnan MI Date: Jul 2018 The battle of background leakage estimate (BLE) in water supply networks has been the subject of discussion in the last years. This paper aims to investigate the effect of pipe materials with particular reference to their impact on the BLE ... Read more
Estimation of water demand in water distribution systems using particle swarm optimization

Author: Letting, LK ; Hamam, Y ; Abu-Mahfouz, Adnan MI Date: Aug 2017 Demand estimation in a water distribution network provides crucial data for monitoring and controlling systems. Because of budgetary and physical constraints, there is a need to estimate water demand from a limited number of sensor measurements. ... Read more
Graph based hydraulic modelling of pressure in water distribution networks

Author: Mpiana, LA ; Hamam, Y ; Abu-Mahfouz, Adnan MI Date: Sep 2017 The increased demands of water and high water losses in the past decade have brought a special attention to Water Distribution Networks. An efficient water distribution utilities management requires an adequate hydraulic modelling of the water ... Read more
GUI-Based AC induced corrosion monitoring for buried pipelines near HVTLs

Author: Adedeji, KB ; Ponnle, AA ; Abe, BT ; Jimoh, AA ; Abu-Mahfouz, Adnan MI ; Hamam, Y Date: Nov 2018 In this paper, a stand-alone application with graphical user interface (GUI) developed for monitoring AC induced corrosion expectancies of buried pipelines near a high voltage AC transmission line is presented. A Rand water site, South Africa, ... Read more
Hand based visual intent recognition algorithm for wheelchair motion

Author: Luhandjula, T ; Djouani, K ; Hamam, Y ; Van Wyk, BJ ; Williams, Q Date: May 2010 This paper describes an algorithm for a visual human-machine interface that infers a person’s intention from the motion of the hand. Work in progress shows a proof of concept tested on static images. The context for which this solution is ... Read more
Impact of pressure-driven demand on background leakage estimation in water supply networks

Author: Adedeji, KB ; Hamam, Y ; Abu-Mahfouz, Adnan MI Date: 2019 Increasing water demand due to urbanization creates a need to develop schemes for managing water supply networks (WSNs). In recent years, hydraulic modeling of WSNs has been used to assess the state of networks in terms of leakage analysis ... Read more
Improving the physical layer security of wireless communication networks using spread spectrum coding and artificial noise approach

Author: Adedeji, K ; Hamam, Y ; Abe, B ; Abu-Mahfouz, Adnan MI Date: Sep 2016 Recent advances in technologies has led to the use of wireless communication networks for the transmission of information. However, the broadcast nature of wireless channels has made it vulnerable to attacks. In this paper, we present work ... Read more
Increasing supported VoIP flows in WMNs through link-based aggregation

Author: Olwal, T ; Okech, J ; Hamam, Y ; Kurien, A ; Odhiambo, M Date: Oct 2008 As Voice over IP (VoIP) becomes a reality, service providers will be able to offer the service to remote and over populated areas that currently are not or are only partially reached by available Public Switched Telephone Network (PSTN). The ... Read more
An interface for coupling optimization algorithms with EPANET in discrete event simulation platforms

Author: Letting, LK ; Hamam, Y ; Abu-Mahfouz, Adnan MI Date: Jul 2017 The application of simulation optimization in water distribution network analysis and design is a promising method for generating solutions to existing challenges. The absence of a standard interface for coupling the open source EPANET software ... Read more
Interference-aware power control for multi-radio multi-channel wireless mesh networks

Author: Olwal, TO ; Van Wyk, BJ ; Djouani, K ; Hamam, Y ; Siarry, P ; Ntlatlapa, Ntsibane S Date: Sep 2009 Multi-Radio Multi-Channel (MRMC) systems are key to power control problems in WMNs. In this paper, we present a dynamic power control for MRMC WMNs. First, WMN is represented as a set of disjoint Unified Channel Graphs (UCGs). Second, each ... Read more
Investigation of graphene loaded polypyrrole for lithium-ion battery

Author: Folorunso, O ; Hamam, Y ; Sadiku, R ; Adekoya, GJ ; Ray, Suprakash S Date: Apr 2020 The discredit state of lithium-ion (Ln) battery is as a result of the challenges associated with electrodes, inadequate power and energy densities. For a battery to be classified as suitable for electric vehicle and grid power suppliers, ... Read more
Leakage detection algorithm integrating water distribution networks hydraulic model

Author: Adedeji, K ; Hamam, Y ; Abe, B ; Abu-Mahfouz, Adnan MI Date: Jun 2017 Water loss through leaking pipes is inexorable in water distribution networks (WDNs) and has been recognized as a major challenge facing the operation of municipal water services. This is strongly linked with financial costs due to economic ... Read more
Leakage detection and estimation algorithm for loss reduction in water piping networks

Author: Adedeji, KB ; Hamam, Y ; Abe, BT ; Abu-Mahfouz, Adnan MI Date: Oct 2017 Water loss through leaking pipes constitutes a major challenge to the operational service of water utilities. In recent years, increasing concern about the financial loss and environmental pollution caused by leaking pipes has been driving ... Read more
Multiple-state based power control for multi-radio multi-channel wireless mesh networks

Author: Olwal, TO ; Djouani, K ; van Wyk, BJ ; Hamam, Y ; Siarry, P ; Ntlatlapa, Ntsibane S Date: 2009 Multi-Radio Multi-Channel (MRMC) systems are key to power control problems in wireless mesh networks (WMNs). In this paper, we present asynchronous multiple-state based power control for MRMC WMNs. First, WMN is represented as a set of disjoint ... Read more
Network preservation through a topology control algorithm for wireless mesh networks

Author: Aron, FO ; Olwal, TO ; Kurien, A ; Hamam, Y Date: Sep 2008 Wireless mesh networks (WMNs) is becoming a promising new technology for extending coverage to farflung rural areas. This it achieves by linking the various wireless LANS (WLANs) in distant locations thus providing a vital mode complimentary ... Read more

Now showing items 3-22 of 43

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