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

Now showing items 201-220 of 301

Laser-assisted synthesis in CueAleNi system and some of its properties

Sky, I. Shishkov; Yadroitsev, I.; Morozov, Yu. (Elsevier B.V: Journal of Alloys and Compounds, 2016)

Conditions of intermetallic phase synthesis during layerwise selective laser sintering/melting in CueAl eNi powdered system were explored. There to we used optical and scanning electron microscopy, EDX and XRD analysis ...
Deformation Behavior and Microstructure of Ti6Al4V Manufactured by SLM

Krakhmalev, P.; Fredriksson, G.; Yadroitsava, I.; Kazantseva, N.; du Plessis, A.; Yadroitsev, I. (Elsevier B.V: Physics Procedia, 2016)

Mechanical properties, porosity, and microstructure of Ti6Al4V (ELI) material produced by Selective Laser Melting (SLM) under controlled oxygen content were analyzed. Fully martensitic α’structure with high dislocation ...
VALIDATION OF MINIATURISED TENSILE TESTING ON DMLS TI6AL4V (ELI) SPECIMENS

van Zyl, Ian; Moletsane, M; Krakhmalev, Pavel (The South African Journal of Industrial Engineering, 2016)

Direct metal laser sintering (DMLS) is a relatively new technology that is developing rapidly. Since DMLS material is created by melting/solidifying tracks and layers from powder, even building geometry can influence the ...
RESIDUAL STRESS IN TI6AL4V OBJECTS PRODUCED BY DIRECT METAL LASER SINTERING

van Zyl, Ian; Yadroitsava, Ina; Yadroitsev, Igor (The South African Journal of Industrial Engineering, 2016)

Direct Metal Laser Sintering produces 3D objects using a layer-by-layer method in which powder is deposited in thin layers. Laser beam scans over the powder fusing powder particles as well as the previous layer. ...
Some happy, others sad: exploring environmental justice in solid waste management in Kinshasa, The Democratic Republic of Congo

Kubanza, Nzalalemba Serge; Das, Dillip Kumar; Simatele, Danny (Local Environment: The International Journal of Justice and Sustainability, 2017)

This paper explores the concept of environmental justice (EJ) in solid waste management (SWM) in Kinshasa, the Democratic Republic of Congo (DRC). It evaluates the extent to which EJ occurs in SWM and discusses the factors ...
Resolving contractor commitment challenges in project delivery by using conceptual system dynamics models

Aiyetan, Olatunji Ayodeji; Das, Dillip (Journal of Construction Project Management and Innovation, 2016)

Contractors play a vital role in construction projects. However, their lack of commitment is argued to be one of the major barriers against successful project delivery. This investigation was aimed at to explore how ...
Influence of infrastructure on the economic perspectives of regional tourism development in Odisha State in India

Das, Dillip Kumar (The Indian Journal of Economics, 2015)
Cluster analysis for exploring regional industrial scenario in Odisha state, India

Das, Dillip Kumar (Indian Journal of Regional Science, 2016)

This study assesses the current industrial scenario using cluster analysis, and explores plausible perspectives for location of apposite industries in the geographical region bounded by the river valleys and flood plains ...
An integrated approach for modeling the electricity value of a sugarcane production system

Mutanga, Shingirirai Savious; de Vries, Marne; Mbohwa, Charles; Kumar, Dillip Das (Elsevier: Applied Energy, 2016)

The spatial system dynamics model (SSDM) of sugarcane industrial ecosystem presented in this paper is towards an integrated approach to simulate a bio refinery system suggesting directions for bagasse and trash-derived ...
Shortcomings in the estimation of clay fraction by hydrometer

Stott, P; Theron, E (scielo: Journal of the South African Institution of Civil Engineering, 2016)

The estimation of clay fraction is important for predicting the engineering properties of a soil. SANS 3001 GR3 (SANS 2011) specifies a procedure for clay fraction determination using a hydrometer. It has long been suspected ...
multi-agent based distributed voltage control algorithm for Smart Grid Applications

Manditereza, Patrick; Bansal, Ramesh (Journal Electric Power Components and Systems, 2016)

The integration of renewable energy generators in distribution networks has increased the complexity of the voltage control problem rendering traditional control methods ineffective. This article proposes a voltage control ...
Renewable distributed generation: The hidden challenges – A review from the protection perspective

Manditereza, Patrick Tendayi; Bansal, Ramesh (Elsevier: Renewable and Sustainable Energy Reviews, 2016)

This review paper is focused on the impact of distributed generation (DG) on distribution system protection. The integration of DG is transforming the traditional radial distribution system into a multi-source system that ...
Derivation and verification of empirical catchment response time equations for medium to large catchments in South Africa

Gericke, O. J.; Smithers, J. C. (John Wiley & Sons: HYDROLOGICAL PROCESSES, 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 ...
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 parameter ...
TENSILE PROPERTIES AND MICROSTRUCTURE OF DIRECT METAL LASER-SINTERED TI6AL4V (ELI) ALLOY

Moletsane, M G; Krakhmalev, Pavel; Kazantseva, N; du Plessis, Anton; Yadroitsava, I; Yadroitsev, I (Stellenbosch University Library and Information Service : The South African Journal of Industrial Engineering, 2016)

Direct metal laser sintering (DMLS) is an additive manufacturing technology used to melt metal powder by high laser power to produce customised parts, light-weight structures, or other complex objects. During DMLS, powder ...
Coordination control of robot manipulators using flat outputs

Markusa, Elisha D.; Yskander, Hamam; Ageeb, John T.; Jimoh, Adisa A. (Robotics and Autonomous Systems, 2016)

This paper focuses on the synchronizing control of multiple interconnected flexible robotic manipulators using differential flatness theory. The flatness theory has the advantage of simplifying trajectory tracking tasks ...
Evaluation of single tracks of 17-4PH steel manufactured at different power densities and scanning speeds by selective laser melting

MakoanaI, N.W.; Moller, H.; Burger, H.; TlotlengI, M.; Yadroitsev, I. (South African Journal of Industrial Engineering, 2016)

In Selective Laser Melting, the initial units produced are single tracks that overlap to create a single layer; from the sequence of layers, a 3D object is manufactured. The properties of the parts produced by SLM depend ...
Using the Dual-Tree Complex Wavelet Transform for Improved Fabric Defect Detection

Vermaak, Hermanus; Nsengiyumva, Philibert; Luwes, Nicolaas (Journal of Sensors, 2016)

The dual-tree complex wavelet transform (DTCWT) solves the problems of shift variance and low directional selectivity in two and higher dimensions found with the commonly used discrete wavelet transform (DWT). It has been ...
Natural convection from a spinning cone in Casson fluid embedded in porous medium with injection, temperature dependent viscosity and thermal conductivity

MAKANDA, GILBERT; SIBANDA, PRECIOUS (WSEAS TRANSACTIONS on HEAT and MASS TRANSFER, 2017)

In the present study, a numerical analysis on natural convection Casson fluid flow from a spinning cone in porous medium with injection, temperature-dependent viscosity and thermal conductivity is considered. The surface ...
Reconstruction of an Extensive Midfacial Defect Using Additive Manufacturing Techniques

Fernandes, N; van den Heever, J; Hoogendijk, C; Botha, S; Booysen, G; Els, J (Journal Prosthodont., 2016)

Malignant peripheral nerve sheath tumors are extremely rare tumors arising in peripheral nerves. Only 17 cases involving the trigeminal nerve have ever been reported. These tumors have a very poor prognosis and very high ...

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