Browsing Conference Papers - Potchefstroom Campus by Issue Date
Now showing items 21-40 of 713
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Accounting for porous structure in effective thermal conductivity calculations in a pebble bed reactor
(Atomic Energy Society of Japan, 2009)A proper understanding of the mechanisms of heat transfer, flow and pressure drop through a packed bed of spheres is of utmost importance in the design of a high temperature pebble bed reactor. A thorough knowledge of the ... -
Analysis of the porous structure of an annular pebble bed reactor
(Atomic Energy Society of Japan, 2009)This paper discusses the numerical analysis of the porous structure of an annular packed bed. Numerical procedures are described to determine the variation in the porosity, the variation in the coordination number (measure ... -
Using an effective viscosity to account for the effect of the walls on the pressure drop through an annular packed bed
(ASME, 2009)The question arose whether the correlation for the pressure drop prescribed for cylindrical pebble bed reactors by the Nuclear Safety Commission (KTA) of Germany could still be applied to the proposed annular configuration ... -
Evaluating methods to binarize historic cosmic-ray recordings
(IEEE, 2009)Three adaptive image binarization approaches are evaluated to find the method best suited for the binarization of historic cosmic-ray data. The methods are optimized by fine tuning their parameters and they are then ... -
Unraveling the emission geometry of the Fermi millisecond pulsars
(Fermi, 2009)The nine millisecond pulsars (MSPs) that have now been detected by Fermi-LAT are providing an excellent opportunity to probe the emission geometry of these ancient compact objects. As they are radio-loud, one may use the ... -
Modeling of gamma-ray millisecond pulsar light curves revealed by Fermi-LAT
(Thê Giói Publishers, 2009)Fermi Large Area Telescope (LAT) has recently detected 8 gamma-ray millisecond pulsars (MSPs), providing an unprecedented opportunity to probe the magnetospheres of these lowspin-down pulsars. We performed 3D emission ... -
Issues in software development practices : A South African software practitioners’ viewpoint
(2009)Software development is a process tasked with the development of artefacts that are used to implement organizational information systems. Depending on the social, economical and environmental setting, different ... -
The application of modern technology in power quality management
(IEEE, 2009)Little business integration of power quality management (PQM) is forthcoming amongst electrical utilities all over Southern Africa. Restricted access to proper information is the main reason. A integration of tools, ... -
Export market selection methods and the identification of realistic export opportunities for South Africa using a decision support model
(2009)Market selection methods, of which a vast number exist, are a critical tool in firms’ and government’s policy, planning and budgeting processes. To this end, the primary aim of this paper is to determine the international ... -
The use of disruptive information technologies for competitive advantage in the banking sector of South Africa.
(Hempstead, NY : International Business Information Management Association (IBIMA), 2009)The main focus of this paper is to determine the impact of disruptive technology in the ICT environment and how new technologies can be managed in a secured architecture framework of organisations in the banking sector. ... -
Measurement and verification baseline development and service level adjustments for fridge plant systems
(2009)In this article the authors provide an overview of a fridge plant system and discuss the data requirements and data selection for baseline development. The baseline development is divided into two scenarios: 1) where ... -
Evaluating predictors of abnormal stock returns multivariate models
(ACTA Press, 2010)In recent years much research effort has been spent on the development of statistical and neural network techniques to predict abnormal stock returns. Much previous work focused on time series prediction of stock returns, ... -
Multivariable H∞ control for an active magnetic bearing flywheel system
(IET, 2010)A state-space model with uncertainties for an active magnetic bearing energy storage flywheel system (Fly-UPS) is developed. A multivariable robust H∞ controller for the Fly-UPS is then synthesised. Different weighting ... -
The validation of single point measurements for the localization of multiple harmonic sources
(IEEE, 2010)Power quality management requires inexpensive and simple methods for electric power quality monitoring. This paper investigates the validity of single point measurements for the localization of sources of waveform distortion ... -
A non-linear simulation model of an active magnetic bearings supported rotor system
(IEEE, 2010)Nowadays active magnetic bearings (AMBs) are utilized in a wide range of applications including high-speed flywheel energy storage devices. This paper aims at reporting on the modeling and simulation of a flywheel energy ... -
On the assessment of voltage unbalance
(IEEE, 2010)The management of voltage unbalance in a power system is supported by the knowledge on the contribution of a single unbalanced load/source to the total level of voltage unbalance observed at a Point of Common Coupling (PCC) ... -
The flow and heat transfer in a packed bed high temperature gas-cooled reactor
(ASME, 2010)Engineers are faced with two major challenges when carrying out the thermal-fluid design of a complex system consisting of many interacting components such as the PBMR power plant. The first challenge is to predict the ... -
A Preliminary Study for Post-Kyoto Period for Turkey by MARKAL Model
(2010)There are several mathematical models that have been developed for assessing specific energy systems and MARKAL, that has been developed by the Energy Technology Systems Analysis Program (ETSAP) of the International Energy ... -
Challenges faced by divergent ICT schools regarding branding and establishing research foci. Panel discussion held at SACLA 2010, Cullinan, 4-6 June 2010.
(2010)The audience will be informed about the process of establishing a new research niche area in a School of Information Technology situated on the Vaal Triangle Campus (VTC) of the North-West University (NWU). The School ... -
Developing multivariate models to predict abnormal stock returns - using cross-sectional differences to identify stocks with above average return expectations
(SCITEPRESS (Science and Technology Publications, Lda.), 2010)This paper describes the development of multivariate models used to identify stocks with above average return expectations. While most other research involving the development of stock return models involves time-series ...
