Author:Obiro, WC; Ray, Suprakas S; Emmambux, MNDate:Feb 2012The amylose component of starch can form complexes known as V-amylose with amphiphilic or hydrophobic ligands. The V-amylose complexes are single, left-handed helices that are arranged as crystalline and amorphous lamellae, which may form ...Read more
Author:Mashapa, MG; Chetty, N; Ray, Suprakas SDate:Oct 2012The effect of divacancies on the stability, structural and electronic properties of carbon and boron nitride nanotubes is studied using the ab initio density functional method. VBBN is more stable in the boron-rich and less stable in the ...Read more
Author:Mathabathe, Maria N; Bolokang, Amogelang S; Govender, Gonasagren; Mostert, RJ; Siyasiya, CWDate:Aug 2018The y-TiAl intermetallic alloy doped with Nb, Cr, and Si metals has been developed. It has emerged that the ternary Ti-48Al-2Nb and quinary Ti-48Al-2Nb-0.7Cr-0.3Si alloys yielded the best mechanical and cyclic oxidation properties. In particular, ...Read more
Author:Rust, FC; Van Dijk, G; Fourie, HS; Smit, Michelle ADate:Dec 2021Investment in Research and Development (R&D) is scrutinised where funding is limited such as in developing counties. There is therefore an increased emphasis on benefit and impact assessment tools and systems for such R&D programmes. In sectors ...Read more
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:Moller, J; Jovanovic, Nebojsa; Garcia, CL; Bugan, Richard DH; Mazvimavi, DDate:Sep 2017Satellite-based remote sensing of soil water content (SWC) is a promising technology for hydrological applications to overcome large spatiotemporal variabilities of SWC. This study investigated the performance of the Advanced Scatterometer ...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:Jovanovic, Nebojsa; Garcia, CL; Bugan, Richard DH; Teich, I; Garcia Rodriguez, CMDate:Mar 2014Quantification of the water cycle components is key to managing water resources. Remote sensing techniques and products have recently been developed for the estimation of water balance variables. The objective of this study was to test the ...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:Nsibande, SA; Dabrowski, James M; van der Walt, E; Venter, A; Forbes, PBCDate:Jun 2015Air dispersion software models for evaluating pesticide spray drift during application have been developed that can potentially serve as a cheaper convenient alternative to field monitoring campaigns. Such models require validation against ...Read more