DSpace Home
→
Research and Innovation Unit
→
Research Articles: Faculty of Engineering and Information Technology
→
Recent submissions

Research Articles: Faculty of Engineering and Information Technology: Recent submissions

Now showing items 181-200 of 301

ATTRIBUTES CONTRIBUTING TO STUDENTS’ USE OF QUALITY SOFTWARE DEVELOPMENT PRACTICES

Nel, Guillaume; Nel, Liezel; Cronje, Johannes (The African Journal of Information and Communication (AJIC), 2015)

In 2001 the “McCracken group”, through a multi-institutional study, concluded that many students finishing their introductory programming courses could not program due to a lack of problem solving skills. In 2004 Lister ...
Optimization of the daily operation of a hydrokinetic–diesel hybrid system with pumped hydro storage

Kusakana, Kanzumba (Energy Conversion and Management, 2015)

The present paper develops a model to optimize the daily operation of a hybrid energy system consisting of a hydrokinetic, a pumped hydro storage system and diesel generator. The optimization approach is aimed at minimizing ...
Operation cost minimization of photovoltaicedieselebattery hybrid systems

Kusakana, Kanzumba (Energy, 2015)

In this paper, two control strategies involving “continuous” and “ON/OFF” operation of the diesel generator in the solar photovoltaicedieselebattery hybrid systems are modeled. The main purpose of these developed models ...
Feasibility analysis of river off-grid hydrokinetic systems with pumped hydro storage in rural applications

Kusakana, Kanzumba (Energy Conversion and Management, 2015)

Hydrokinetic power generation is currently gaining interest as a cost effective way of supplying isolated areas where reasonable water resource is available. However the seasonal characteristic of the water resource as ...
Derivation and verification of empirical catchment response time equations for medium to large catchments in South Africa

Gericke, O. J.; Smithers, J. C. (HYDROLOGICAL PROCESSES: Wiley Online Library, 2016)

Despite uncertainties and errors in measurement, observed peak discharges are the best estimate of the true peak discharge from a catchment. However, in ungauged catchments, the catchment response time is a fundamental ...
Direct estimation of catchment response time parameters in medium to large catchments using observed streamflow data

Gericke, O.J.; Smithers, J.C. (Hydrological Processes: WILEY, 2015)

In single‐event deterministic design flood estimation methods, estimates of the peak discharge are based on a single and representative catchment response time parameter. In small catchments, a simplified convolution process ...
Are estimates of catchment response time inconsistent as used in current flood hydrology practice in South Africa?

Gericke, O.J.; Smithers, J.C. (Journal of the south african institution of civil engineering, 2016)

Catchment response time parameters are one of the primary inputs required when design floods, especially in ungauged catchments, need to be estimated. The time of concentration (TC) is the most frequently used time ...
Optimal scheduled power flow for distributed photovoltaic/wind/diesel generators with battery storage system

Kusakana, Kanzumba (The Institution of Engineering and Technology Renewable Power Generation, 2015)

In this study, two control strategies involving ‘continuous’ and ‘ON/OFF’ operation of the diesel generator in the solar photovoltaic (PV)-wind-diesel-battery hybrid systems are modelled. The main purpose of these developed ...
Micro-hydrokinetic river system modelling and analysis as comparedto wind system for remote rural electrification

Koko, Sandile Phillip; Kusakana, Kanzumba; Vermaak, Herman Jacobus (Electric Power Systems Research, 2015)

Micro-hydrokinetic river (MHR) system is one of the promising technologies to be used for remote ruralelectrification. In rural areas with access to both wind and flowing water resources, wind generationis selected as a ...
Optimal energy management of a grid-connected micro-hydrokinetic with pumped hydro storage system

Kokoa, S.P.; Kusakanab, K; Vermaakb, H.J. (Journal of Energy Storage, 2017)

Renewable energy sources are the key alternatives to mitigate the issue of greenhouse gases (GHGs) and to meet the ever increasing electricity demand. In South Africa, most energy is consumed by the industrial sectors ...
The Use of an Innovative Jig to Stimulate Awareness of Sustainable Technologies among Freshman Engineering Students

Hertzog, Pierre; Swart, Arthur James (Sustainability, 2015)

Renewable energy systems, such as photovoltaic (PV) systems, still require a great deal of research and development in order to improve efficiency, reduce overall manufacturing costs, and to become more sustainable in ...
Review of methods used to estimate catchment response time for the purpose of peak discharge estimation

Gericke, Ockert J.; Smithers, Jeff C. (Hydrological Sciences Journal, 2014)

Large errors in peak discharge estimates at catchment scales can be ascribed to errors in the estimation of catchment response time. The time parameters most frequently used to express catchment response time are the ...
Development of a customised design flood estimation tool to estimate floods in gauged and ungauged catchments

Gericke, OJ; du Plessis, JA (Water SA, 2013-01-01)

The estimation of design flood events, i.e., floods characterised by a specific magnitude-frequency relationship, at a particular site in a specific region is necessary for the planning, design and operation of hydraulic ...
Catchment parameter analysis in fl ood hydrology using GIS applications

Gericke, O J; du Plessis, J A (JOURNAL OF THE SOUTH AFRICAN INSTITUTION OF CIVIL ENGINEERING, 2012-10)

The use of Geographical Information Systems (GIS) has permeated almost every field in the engineering, natural and social sciences, offering accurate, efficient, reproducible methods for collecting, viewing and analysing ...
Evaluation of the standard design flood method in selected basins in South Africa

Gericke, O J; du Plessis, J A (JOURNAL OF THE SOUTH AFRICAN INSTITUTION OF CIVIL ENGINEERING, 2012-10)

Design flood estimations display relatively wide confidence bands of uncertainty around all estimates of flood magnitude-frequency relationships. Taking cognisance of this, and the fact that most of the available design ...
Evaluation of critical storm duration rainfall estimates used in flood hydrology in South Africa

Gericke, OJ; du Plessis, JA (Water S.A., 2011-12-08)

Design rainfall comprises of a depth and duration associated with a given probability of exceedance or return period. The purpose of the study was to evaluate and compare the methods used in flood hydrology to estimate ...
Spatiotemporal analysis of droughts using self-calibrating Palmer’s Drought Severity Index in the central region of South Africa

Edossa, Desalegn C.; Woyessa, Yali E.; Welderufael, Worku A. (Springer International Publishing AG: Theoretical and Applied Climatology, 2016)

The loss of life and property from drought events has forced society to focus on the development of reliable early warning systems which may enable farmers and other stakeholders to correctly and timely adapt to the expected ...
Thermal stability of the cellular structure of an austenitic alloy after selective laser melting

Tsvetkova, E. V.; Bazaleeva, K. O; Balakirev, E. V.; Yadroitsev, I. A.; Smurov, I. Yu. (Springer International Publishing AG: Russian Metallurgy (Metally), 2016)

The thermal stability of the cellular structure of an austenitic Fe–17% Cr–12% Ni–2% Mo–1% Mn–0.7% Si–0.02% C alloy produced by selective laser melting in the temperature range 20–1200°C is investigated. Metallographic ...
ON THE IMPACT OF DIFFERENT SYSTEM STRATEGIES ON THE MATERIAL PERFORMANCE OF SELECTIVE LASER MELTING- MANUFACTURED TI6AL4V COMPONENTS

Dimitrov, Dimitri; Becker, Thorsten Hermann; Yadroitsev, Igor; Booysen, Gerry (Stellenbosch University Library and Information Service : The South African Journal of Industrial Engineering, 2016)

Selective Laser Melting (SLM) is a powder-based additive manufacturing process that has gained substantial interest in recent years due to its feasibility of producing geometrically- complex metallic components for end-use ...
Layer-by-layer laser synthesis of Cu–Al–Ni intermetallic compounds and shape memory effect

Volyanski, I.; Shishkovsky, I. V.; Yadroitsev, I.; Shcherbakov, V. I.; Morozov, Yu. G. (Springer International Publishing AG: Inorganic Materials, 2016)

We have studied conditions for the synthesis of intermetallic phases in the Cu–Al–Ni system by selective laser sintering/melting, in particular by heating a powder mixture to 300°C. The effects of laser synthesis and heating ...

Recently added

Research Articles: Faculty of Engineering and Information Technology: Recent submissions

Search DSpace

Browse

All of DSpace

This Collection

My Account