Conference Publications

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http://hdl.handle.net/10204/11486

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Browsing Conference Publications by Author "Abe, B"

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    Improving the physical layer security of wireless communication networks using spread spectrum coding and artificial noise approach
    (http://www.satnac.org.za, 2016-09) Adedeji, K; Hamam, Y; Abe, B; Abu-Mahfouz, Adnan MI
    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 in progress on a proposed hybrid spread spectrum coding and artificial noise approach to improving the physical layer security of wireless communication channels. The authors are optimistic that, the proposed method will further improve the physical layer security of wireless communication networks.
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    Leakage detection algorithm integrating water distribution networks hydraulic model
    (2017-06) Adedeji, K; Hamam, Y; Abe, B; Abu-Mahfouz, Adnan MI
    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 loss, environmental issues, and water resource savings. Water distribution systems are complex in nature with a large number of pipes. Therefore, monitoring long-range pipelines for leaks is a challenging task. This problem is aggravated when there are simultaneous leakages at various points in more than one pipe in the networks. Consequently, there is an urgent industrial need for a reliable approach to provide the capabilities for loss reduction through the detection of leaking pipes in WDNs. Nevertheless, a large number of techniques for detecting leakages have been proposed in the literature. These methods include the use of acoustic correlation techniques, measurements and statistical analysis of the abrupt changes in pressure at the leak points, and the transient based approach to mention but a few. However, their performance in detecting background leakage is quite low. In WDNs, background leakage is often hidden, small, and continuous, posing the biggest threat to water utilities. Therefore, its detection and estimation is vital for effective water service. For effective detection of background leakages, a hydraulic analysis of flow characteristics in water piping networks is indispensable for appraising such type of leakage. A leakage detection algorithm incorporating the hydraulic model of flow in water piping networks should prove worthwhile in detecting and estimating background type leakages. In this work, a leakage detection algorithm integrating the hydraulic model of the flow in water piping networks is proposed. The hydraulic model takes into account some important parameters of pipes such as pipe deterioration due to ageing, which was not considered in previous leakage detection studies. The deterioration in pipe materials and changes in its diameters over time can lead to unsatisfactory results. Furthermore, in large-scale networks, most leakage detection algorithms only cover a specific area such as the district meter areas (DMAs) of the network. The authors are optimistic that the proposed algorithm for solving network leakage outflow will help improve the leakage detection accuracy while providing the capability to cover a wide area in the large-scale water piping networks.
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    Pressure management strategies for water loss reduction in large-scale water piping networks: a review
    (Springer, 2017-06) Adedeji, K; Hamam, Y; Abe, B; Abu-Mahfouz, Adnan MI
    Water is a precious natural resource; human survival and nearly all modes of economic production depends on water. The efficient use of water resources is a subject of major concern for water utilities around the world. Within the last years, there has been a growing recognition of increasing water demands due to human population growth and urbanization. This poses a threat to the available water resource prompting for the efficient use of this resource. Nonetheless, one of the major challenges in improving the efficiency of drinking water supply networks is the minimization of water losses due to leaking pipes. In water distribution piping networks, water losses are unavoidable and are estimated to account up to 30% to 40% of the total amount of water supplied (input volume into the system) in many countries. Therefore, to satisfy the steadily growing water demand, this very important issue requires urgent attention. Research efforts conducted in the past acknowledged water pressure control as an effective method for reducing losses in water piping networks. Although, adequate pressure is required in the system to meet customer’s demands, it is a general agreements that reducing pressure will reduce the leakage flow rate as well as the possibility of pipe burst or crack. Several pressure management strategies have been proposed for leakage reduction in water distribution systems. In this work, we present an overview of the pressure management approaches proposed for reducing leakages in water distribution networks. Some previous and recent research efforts are outlined. Furthermore, information about leakage control, which may be useful for water utilities and pipeline engineers are provided.
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    Wireless sensor network-based improved NPW leakage detection algorithm for real-time application in pipelines
    (http://www.satnac.org.za, 2016-09) Adedeji, K; Hamam, Y; Abe, B; Abu-Mahfouz, Adnan MI
    With increasing population in South Africa coupled with improved standard of living, the demand for water has increased dramatically in the past few years. To meet this demand and for effective water supply, the water loss through leakages of pipelines transporting this resource needs to be reduced. This paper briefly elaborates on work in progress employing wireless sensor networks (WSNs) to an improved negative pressure wave method for real-time leakage monitoring of a water pipeline network.