Author:Javu, L; Winkler, H; Roro, Kittessa TDate:Nov 2020Global horizontal solar irradiance is the maximum solar radiation coming in all directions from a cloudless sky incident at a location and time. This paper eval uates and validates clear-sky models in different locations of South Africa from ...Read more
Author:Mokgalaka, H; Mans, Gerbrand G; Smit, J; McKelly, DDate:Jul 2014Geographical access is an important aspect of the health care planning process. GIS-based accessibility analysis is a logical method which can be applied to test the degree to which equitable access to services and facilities is obtained. The ...Read more
Author:Mokgalaka, HDate:Jul 2014Accessibility analysis models the access of residents to facilities - assuming people will go to their nearest facility for service. If an analysis is done for a large area, this will show whether provision is sufficient and equitable if both ...Read more
Author:Easton, H; Nakene, M; Naidoo, Soogandhree; Kafidi, PLDate:Nov 2003South Africa is a developing country with diverse multi-cultural communities, eleven official languages and various infrastructure challenges. Enabling e-government is herefore considered a unique problem. A critical approach in developing a ...Read more
Author:Schietekat, Sunelle; De Waal, Alta; Gopaul, Kevin GDate:Sep 2016This paper provides a methodology for Validation and Verification (V&V) of a Bayesian Network (BN) model for aircraft vulnerability against Infrared (IR) missile threats. The model considers that the aircraft vulnerability depends both on a ...Read more
Author:Hamadou Ibrahim, A; Roux, FS; Konrad, TDate:Jul 2011This study focusses on short distance free-space communication, long distance free-space communication, as well as the challenges for free-space communication. The phase screen method is discussed, and the question "how do we know that we are ...Read more
Author:De Waal, A; Willers, Cornelius J; Roodt, JHS; Mudau, AEDate:Aug 2013A commonly-used term in the simulation domain is ‘validation, verification and accreditation’ (VVA). When analysing simulation predictions for the purpose of system solution development and decision-making, one key question persist: “What ...Read more
Author:Willers, Cornelius J; Wheeler, MSDate:Oct 2007Simulation models must be validated to ensure that the simulation reflects reality. The approach taken here is based on a well accepted framework that considers reality, the conceptual model and the computer model. The paper shows how these ...Read more
Author:Badou, DF; Diekkruger, B; Kapangaziwiri, Evison; Afouda, AADate:Oct 2017Soil moisture is known to be important in hydrology, agronomy, floods and drought forecasting. Acquisition of in situ soil moisture data is time consuming, costly, and does not cover the scale required for basin analysis. The consideration ...Read more
Author:Paine, AP; Rossouw, P; Bruwer, R; Williams, MDate:Jul 2007he development of appropriate techniques for casting complex, thin walled, light weight structures and housings, to assist the aerospace sector in achieving the required reductions in component weight and concomitant increase in strength, has ...Read more
Author:Govender, Nicolin; Pizette, P; Wilke, DN; Abriak, NDate:Sep 2015Understanding the dynamical behavior of particulate materials is extremely important to many industrial processes, with typical applications that range from hopper flows in agriculture to tumbling mills in the mining industry. The discrete ...Read more
Author:Tsela, PL; Van Helden, P; Frost, P; Wessels, Konrad J; Archibald, SDate:Jul 2010The Moderate Resolution Imaging Spectroradiometer (MODIS) time-series data afford the remote sensing community a unique opportunity to investigate the frequency and distribution of fires. Previous research that validated the MODIS burned area ...Read more
Author:Naicker, K; Anderson, F; Le Roux, Alize; Alhuwaimel, SDate:Apr 2011Maritime border safeguarding is a vital component in the protection of a countries resources and interests against illegal activities. With the increasing asymmetric nature of today’s threats, a primary requirement of any coastal surveillance ...Read more
Author:Tesfaye, T; Sithole, Bishop B; Ramjugernath, DDate:Oct 2017The poultry industry generates large amount of feathers as a waste by-product. Small amounts are often processed into valuable products such as feather meal and fertilisers and the remaining waste is disposed of by incineration or by burial ...Read more
Author:Coetzee, S; Cooper, Antony KDate:Aug 2007The paper presents examples that illustrate the benefits of addresses in South Africa, such as: Connecting households to utilities such as water, sewage, telecommunications and electricity; Routing emergency services, and providing assistance ...Read more
Author:Herselman, Martha E; Botha, AdèleDate:Jun 2017The purpose of this paper is to indicate what value was co-created with various stakeholders when Design Science Research as a methodology was applied, to develop a Digital Health Innovation Ecosystem (DHIE) for South Africa. Design science ...Read more
Author:Vuorinen, E; Focke, W; Rigo, TDate:Feb 2006A vapour-phase corrosion inhibitor (VCI) needs to be a volatile compound or a mixture of compounds. It reaches the surfaces that need to be protected from corrosion via the vapour phase and forms a relatively stable bond at the interface of ...Read more
Author:Van der Walt, Christiaan M; Barnard, EDate:Feb 2017Estimating the joint probability density function of a dataset is a central task in many machine learning applications. In this work we address the fundamental problem of kernel bandwidth estimation for variable kernel density estimation in ...Read more