Author:Steenkamp, Anton J; De Saxe, CC; Kienhöfer, F; Kemp, LanaDate:Jul 2021The paved road network is a critical asset to any country and its economy. South Africa's paved road network has an estimated value in excess of R2 trillion. This asset is threatened by a backlog in maintenance of more than R416.6 billion, ...Read more
Author:Basson, WD; Davel, MHDate:Nov 2012This paper compares the recognition accuracy of a phoneme-based automatic speech recognition system with that of a grapheme-based system, using Afrikaans as case study. The first system is developed using a conventional pronunciation dictionary, ...Read more
Author:Simpson, LA; Botai, J; De Koning, E; Sivakumar, VDate:Sep 2011This study aims to find a correlation between lightning polarity and microphysical properties of a storm cloud, for events where large amounts of lightning damage have occured and/or there has been a reported lightning-related fatality.Read more
Author:Loots, L; Davel, M; Barnard, E; Niesler, TDate:Nov 2009Phoneme-to-phoneme (P2P) learning provides a mechanism for predicting the pronunciation of a word based on its pronunciation in a different accent, dialect or language. The authors evaluate the effectiveness of manually-developed as well as ...Read more
Author:Grant, T; Burke, Ivan D; Van Heerden, Renier PDate:Mar 2012The purpose of this paper is to find, formalise, and compare models of the offensive cyber operations process available in the open scientific literature. Seven models were sufficiently well described for formalisation using Structured Analysis ...Read more
Author:Grant, T; Burke, Ivan D; Van Heerden, Renier PDate:Oct 2015Based on the idea that offensive cyber operations should be studied and merge from the darkness in which they typically hide, Grant and his colleagues embarked on a research program to explore the potential answers to the question, " What ...Read more
Author:Mashaba, Nikiwe P; Griffith, DJDate:Nov 2020Turbulence is regarded as one of the most deleterious effects on imaging systems. The CSIR have an optical test facility, used to test image quality of surveillance systems, however, the temporal distribution of the near field turbulence is ...Read more
Author:Cho, Moses A; Naidoo, Laven; Mathieu, Renaud SA; Asner, GP; Ramoelo, AbelDate:Nov 2012Several classification techniques have been used to map vegetation communities or land cover types using remote sensing data including maximum likelihood (ML), discriminant analysis and spectral angle mapper classifiers. ML classifier is a ...Read more
Author:Van Zyl, P; Kourie, DG; Boake, ADate:Oct 2006The currently popular distributed, n-tiered, object-oriented application architecture provokes many design debates. Designs of such applications are often divided into logical ‘tiers’ – usually user interface, business logic and domain object, ...Read more
Author:Le Roux, B; Van der Laan, M; Gush, Mark B; Bristow, KLDate:Sep 2018The lack of sustainability of our water resources threatens food security in many places worldwide. Different water footprint (WF) methodologies were investigated for their ability to improve water management at various scales. Methodologies ...Read more
Author:Breytenbach, Andre; Eloff, C; Pretorius, EDate:Aug 2013Accessibility to higher resolution earth observation satellites suggests an improvement in the potential for fine scale image classification. In this comparative study, imagery from three optical satellites (WorldView-2, Pléiades and RapidEye) ...Read more
Author:Sharma Grover, A; Barnard, EDate:May 2011Over the past decade applications of speech technologies for development (ST4D) have shown much potential for enabling information access and service delivery. In this paper the authors review two deployed ST4D services and posit a set of ...Read more
Author:Lacante, SC; De Beer, Morris; Horak, EDate:1991Many years of experience exist in South Africa on the use and interpretation of Benkelman beam type of road surface deflection measurements with the Road Surface Deflectometer (RSD), as well as depth deflection measurements with the use of ...Read more
Author:Long, Craig S; Ramatlo, Dineo AM; Loveday, Philip WDate:Sep 2018In this paper, we present a comparison between two different methods for modelling the response of an elastic waveguide to a point force excitation.Read more
Author:Main, Russell S; Cho, Moses A; Van Aardt, J; Majeke, BDate:Oct 2008The majority of earth observation studies have for years made use of data from multispectral spaceborne sensors. More recently though, both airborne and spaceborne narrowband hyperspectral sensors have come to the fore and are able to provide ...Read more
Author:Debba, Pravesh; Maina, J; Willemse, EDate:Nov 2010This paper reports on the results from ordinary least squares and ridge regression as statistical methods, and is compared to numerical optimization methods such as the stochastic method for global optimization, simulated annealing, particle ...Read more
Author:Greben, HA; Maree, JP; Mnqanqeni, SDate:2000Sulphate was reduced via sulphide to sulphur when operating a single-stage completely mixed reactor configuration feeding synthetic feed. The aim of this study was to determine the volumetric and specific sulphate reduction rates using sugar, ...Read more
Author:Steyn, WJvdM; Denneman, E; Mahlangu, SDate:Jul 2008In this paper the focus is on the comparison between the permanent deformation behaviour of the standard HMA mix and one rut resistant HMA mix of which the grading differs from that of the standard HMA mix. The permanent deformation has been ...Read more
Author:Van Schoor, Michael; Mare, LP; Fourie, CJSDate:Sep 2009Physical properties of rock samples from exploration or mining sites are often needed to assist in the planning of geophysical surveys or in the interpretation of geophysical results. For example, the output from a physical property study may ...Read more