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Browsing by Author "Isaac, Sherrin J"

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AutoElbow: An automatic elbow detection method for estimating the number of clusters in a dataset

Author: Onumanyi, Adeiza J ; Molokomme, Daisy N ; Isaac, Sherrin J ; Abu-Mahfouz, Adnan MI Date: 2022 The elbow technique is a well-known method for estimating the number of clusters required as a starting parameter in the K-means algorithm and certain other unsupervised machine-learning algorithms. However, due to the graphical output nature ... Read more
A delegated proof of proximity scheme for industrial internet of things consensus

Author: Ledwaba, LPI ; Hancke, GP ; Mitrokotsa, A ; Isaac, Sherrin J Date: Oct 2020 Recently, work with Distributed Ledger Technologies (DLTs) has focussed on leveraging the decentralised, immutable ledger for use outside of cryptocurrency. One industry poised to benefit from DLTs is the Industrial Internet of Things (IIoT); ... Read more
Developing a secure, smart microgrid energy market using distributed ledger technologies

Author: Ledwaba, LPI ; Hancke, GP ; Isaac, Sherrin J ; Venter, HS Date: Jul 2019 The ability for the smart microgrid to allow for the independent generation and distribution of electrical energy makes it an attractive solution towards enabling universal access to electricity within developing economies. Distributed Ledger ... Read more
An experimental investigation into high bandwidth wireless communication standards for the underground mine stope

Author: Chetty, Brenton L ; Isaac, Sherrin J ; Walingo, T Date: Sep 2023 There are many challenges associated with developing a feasible wireless communication system for the harsh underground mining environment. Radio signals suffer from strong attenuations due to the excessive reflections, diffractions, scatterings, ... Read more
Investigating distance bounding for delegated proof-of-proximity consensus within IIoT

Author: Ledwaba, Lehlogonolo PI ; Hancke, GP ; Isaac, Sherrin J Date: Jun 2022 With limited processing, energy and storage along with a deadline sensitive operational environment, the combination of the Industrial IoT (IIoT) with distributed ledger technologies (DLTs) could serve to introduce intolerable latency into ... Read more
A micro grid information architecture with open source components

Author: Smith, Andrew C ; Mkhize, Cyprian B ; Mahlobo, Boitumelo T ; Isaac, Sherrin J Date: Dec 2021 Presented is an information system architecture based on open source platforms to support the successful management of a micro grid. The paper justifies the use of open source platforms in the micro grid context. Also given are the benefits ... Read more
Multi-level infrastructure of interconnected testbeds of large-scale wireless sensor networks (MI2T-WSN)

Author: Abu-Mahfouz, Adnan MI ; Steyn, LP ; Isaac, Sherrin J ; Hancke, GP Date: Jun 2012 Wireless sensor networks (WSNs) have been used in different types of applications and deployed within various environments. Simulation tools are essential for studying WSNs, especially for exploring large-scale networks. However, WSN testbeds ... Read more
Performance analysis of machine learning algorithms for energy demand–supply prediction in smart grids

Author: Cebekhulu, Eric ; Onumanyi, Adeiza J ; Isaac, Sherrin J Date: Feb 2022 The use of machine learning (ML) algorithms for power demand and supply prediction is becoming increasingly popular in smart grid systems. Due to the fact that there exist many simple ML algorithms/models in the literature, the question arises ... Read more
Performance costs of cryptography in securing new-generation Internet of Energy endpoint devices

Author: Ledwaba, Lehlogonolo PI ; Hancke, GP ; Venter, HS ; Isaac, Sherrin J Date: Jan 2018 In past years, cryptography has been considered a difficult task to achieve on sensor nodes for the Internet of Energy (IoE) owing to the resource-constrained nature of 8-bit and 16-bit microcontroller units (MCUs). Previous attempts at ... Read more
Planning a multi-institutional information for development study centre

Author: Moreno, A ; Sutinen, E ; Laine, TH ; Herselman, Martha E ; Isaac, Sherrin J ; Botha, Adèle ; Foko, Thato E Date: May 2010 This paper describes the processes followed in establishing an I4D Study Centre at the Meraka Institute (South Africa). The initiative started as a joint effort between the Meraka Institute (South Africa) and University of Eastern Finland ... Read more
Positioning system in wireless sensor networks using NS-2

Author: Abu-Mahfouz, Adnan MI ; Hancke, GP ; Isaac, Sherrin J Date: Oct 2012 The practical difficulties of setting up a wireless sensor network (WSN) and analysing its performance have made simulation essential for the study of WSNs. The ns-2 network simulator is one of the most widely used tools by researchers to ... Read more
Smart microgrid energy market: Evaluating distributed ledger technologies for remote and constrained microgrid deployments

Author: Ledwaba, Lehlogonolo PI ; Hancke, GP ; Isaac, Sherrin J ; Venter, HS Date: Mar 2021 The increasing strain on ageing generation infrastructure has seen more frequent instances of scheduled and unscheduled blackouts, rising reliability on fossil fuel based energy alternatives and a slow down in efforts towards achieving universal ... Read more
SmartFactory: The challenges of open and low cost ICT in the small manufacturing industry

Author: Bosscha, Peter A ; Coetzee, CJ ; Terblanche, SP ; Gazendam, AD ; Isaac, Sherrin J Date: Jul 2006 The authors address the neglected field of appropriate information and communication technologies for small companies in the manufacturing industry, through the development of an architecture that integrates various open and low-cost technologies. ... Read more
Survey of wireless sensor network applications from a power utility’s distribution perspective

Author: Isaac, Sherrin J ; Hancke, GP ; Madhoo, H ; Khatri, A Date: Sep 2011 The task of monitoring and controlling power distribution networks is very challenging given the huge number of assets involved and their wide geographic distribution; this frames a role for wireless sensor network (WSN) applications. This ... Read more
Transactive energy: State-of-the-art in control strategies, architectures, and simulators

Author: Onumanyi, Adeiza J ; Isaac, Sherrin J ; Kruger, Carel P ; Abu-Mahfouz, Adnan MI Date: Sep 2021 The concept of transactive energy (TE) in smart grid systems is gaining increased research attention for its potential to optimize distributed energy resources, improve system reliability, as well as provide a balanced ecosystem for fair ... Read more
Transactive energy: State-of-the-art in control strategies, architectures, and simulators

Author: Onumanyi, Adeiza J ; Isaac, Sherrin J ; Kruger, Carel P ; Abu-Mahfouz, Adnan MI Date: Sep 2021 The concept of transactive energy (TE) in smart grid systems is gaining increased research attention for its potential to optimize distributed energy resources, improve system reliability, as well as provide a balanced ecosystem for fair ... Read more
Wireless gas sensing in South African underground platinum mines

Author: Abu-Mahfouz, Adnan MI ; Isaac, Sherrin J ; Kruger, Carel P ; Niels Aakvaag, N ; Britta Fismen, B Date: Apr 2014 Approximately 70% of South African mines are classified as fiery, where methane gas potentially could cause explosions. The number of flammable gas reports and accidents are increasing steadily for both gold and platinum mines. However, there ... Read more
Wireless Sensor Networks TestBed: ASNTbed

Author: Dludla, Angeline G ; Abu-Mahfouz, Adnan MI ; Kruger, Carel P ; Isaac, Sherrin J Date: May 2013 Wireless sensor networks (WSNs) have been used in different types of applications and deployed within various environments. Simulation tools are essential for studying WSNs, especially for exploring large-scale networks. However, WSN testbeds ... Read more

Now showing items 1-18 of 18

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