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Research Outputs (Electrical & Mining Engineering): Recent submissions

Now showing items 21-40 of 48

Design of a PV Based Power Supply with a NonInverting Buck-Boost Converter

Ogudo, Kingsley; Umenne, Patrice (IEEE, 2019-12-09)

This paper presents the design of a photovoltaic based power supply using a non-inverting buck-boost converter to charge batteries. The batteries can be used to power a load as back-up power when there is no sunlight. ...
Coal as a strategic resource in South Africa

Dikgwatlhe, Pule (Society of Mining Professors (SOMP) in collaboration with the Mining Engineering Education South Africa (MEESA) and The South African Institute of Mining and Metallurgy (SAIMM), 2018-03-13)

The higher price of oil and gas has positioned coal as the premium source of energy. This is likely to remain so as electricity demand is steadily rising. Listed as a strategic resource to the South African economy, coal ...
Emulating Software Defined Network Using Mininet and OpenDaylight Controller Hosted on Amazon Web Services Cloud Platform to Demonstrate a Realistic Programmable Network.

Lindinkosi L. Zulu; Kingsley Ogudo; Umenne, Patrice (IEEE Mauritius Subsection on IEEEexplore, 2018-12-07)

In this paper, a Software Defined Network was created in Mininet using python script. An external interface was added in the form of an OpenDaylight controller to enable communication with the network outside of Mininet. ...
Simulating Software Defined Networking Using Mininet to Optimize Host Communication in a Realistic Programmable Network.

Lindinkosi L. Zulu; Kingsley A. Ogudo; Umenne, Patrice (IEEE Mauritius Subsection on IEEEexplore, 2018-08-22)

In this paper, Mininet-WiFi was used to simulate a Software Defined Network to demonstrate Mininet-WiFi’ s ability to be used as the Software Defined Network emulator which can also be integrated to the existing network ...
Constrictions Fabricated on YBCO Thin Film using the Femtosecond Laser: Limiting Factors.

Patrice Umenne; V.V Srinivasu (Acta Physica Polonica A, 2018-07-01)

In this paper we report on the development of a new application of the femtosecond laser, namely, the fabrication of micron, sub-micron and nano sized constrictions on YBCO superconductive thin films. The fabricated micron, ...
Microwave Power dependence of the I-V Characteristics of Submicron and Micron YBCO Constrictions.

Patrice Umenne.; V.V Srinivasu. (American Institute of Physics (AIP) Conference Proceedings, 2018-05-08)

In this paper, the femtosecond laser technique was used to fabricate micron and submicron sized Josephson Junctions. The influence of an RF signal of frequency 19.5 GHz on the critical current of the micron sized ...
A quadri-dimensional approach for poor performance prioritization in mobile networks using Big Data

Mampaka, Maluambanzila Minerve; Sumbwanyambe, Mbuyu (2019-02-04)

The Management of mobile networks has become so complex due to a huge number of devices, technologies and services involved. Network optimization and incidents management in mobile networks determine the level of the quality ...
Josephson Effect in the Micron and submicron YBCO Constrictions Fabricated Using the Femtosecond Laser Technique

Umenne, Patrice; Lam, Simon; Du, Jia; Srinivasu V.V. (Springer, 2017-10-06)

A femtosecond laser was used successfully to fabricate planar micron and submicron-sized constrictiontype Josephson junctions on YBa2Cu3O7−x thin films. A simple program using G-code (control systems) programming language ...
Femtosecond laser fabrication of micron and sub-micron sized S-shaped constrictions on high Tc superconducting YBCO thin films: ablation and lithography issues

Umenne, Patrice; Srinivasu V.V., / (© Springer Science+Business Media New York 2016, 2016-12-19)

We demonstrate the fabrication of micron and sub-micron sized constrictions on high TcTc superconducting YBa2Cu3O7−x (YBCO) thin films using the femtosecond laser. The lithography process was optimized by programming the ...
Performance of an 802.11g/Wi-Fi network whilst streaming voice content

Umenne, Patrice (World academy of Science, Engineering and Technology, 2012-09-26)

A simple network model is developed in OPNET to study the performance of the Wi-Fi protocol. The model is simulated in OPNET and performance factors such as load, throughput and delay are analysed from the model. Four ...
Performance Analysis of a WiMAX/WiFi system whilst streaming a video conference application

Umenne, Patrice; Odhiambo, Marcel O (World Academy of Science, Engineering and Technology, 2012-08-10)

WiMAX and Wi-Fi are considered as the promising broadband access solutions for wireless MAN’s and LANs, respectively. In the recent works WiMAX is considered suitable as a backhaul service to connect multiple dispersed ...
Performance Analysis of a WiMAX/W-Fi System whilst streaming different Video conference applications with varying network loads

Umenne, Patrice; Odhiambo, Marcel O (The World Congress in Computer Science, Computer Engineering and Applied Computing (WorldComp), 2013-11-11)

WiMAX and Wi-Fi are considered as the promising broadband access solutions for wireless MAN’s and LANs, respectively. In the recent works WiMAX is considered suitable as a backhaul service to connect multiple dispersed ...
The WiMAX PHY Layer

Odhiambo, Marcel O.; Rayolla, Amimo P.O. (InTech, 2012-03-07)
Towards a converged network : video streaming over WiMAX vs. HSDPA in the rural environment

Odhiambo, M.O.; Amimo-Rayolla, P. O.; Kurien, A.M. (AFRICON, 2009-09-23)

As the telecommunications industry evolves towards a converged IP-Core network the role of cellular/wireless broadband technologies in achieving Long Term Evolution (LTE) must be greatly evaluated. This would in effect ...
Improving video streaming over IEEE 802.11 mesh networks through a cross-layer design technique

Moleme, N. H.; Odhiambo, M.O.; Kurien, A.M. (Third International Conference on Broadband Communications, Information Technology & Biomedical Applications, 2008-11-26)

There has been a spate of interest in wireless mesh networks in recent years. The reason behind such an upsurge of interest is that wireless mesh networks are seen as enablers of ubiquitous broadband access applications ...
Enhancing video streaming in 802.11wireless mesh networks using two-layer mechanism solution

Moleme, N. H.; Odhiambo, M.O.; Kurien, A.M. (AFRICON, 2009-09-23)

Multihop wireless mesh networks have emerged as the next generation in wireless network technology. This is due to the advantages provided by the mesh network technology. WMNs provides ease of installation, cost effective ...
TESPAR Coded Speech Quality Evaluation (TCSQE) : A New Algorithm for Objective Measurement of Speech Quality in Cellular Networks

Adar, Philip O.; Odhiambo, Marcel O. (AFRICON, 2009-09-23)

Speech transmission quality measurement in cellular networks is a major indicator of performance for end-to-end quality of service standards. Many approaches have been proposed in the previous studies, but the results ...
Interconnection scheme for NOW (Network of Workstations)

Odhiambo, Marcel O. (AFRICON,IEEE, 1999-09-28)

Interconnection Scheme for NOW aims to provide a network of hosts (distributed computer system) in which distributed computing can be performed. The distributed system akin to the Internet, consists of a few or several ...
Message routing algorithm for computer networks

Odhiambo, Marcel O. (ISAS SCI 2001, 2001-07-22)
HYDRA : parallel and distributed swarm computer architecture

Odhiambo, Marcel O. (ROVPIA, 1999-07-16)

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