Author:Butgereit, LDate:May 2011People volunteer their time and energy to projects for many different reasons. For some people, the reason may be that family members are involved in the project such as parents volunteering at their children's schools or parents becoming ...Read more
Author:Greben, JMDate:Aug 2005The conference presented, several methods and trend analysis applied to the South African elections. The conference had discussions on trend mix; properties of the resulting trend mix; elimination of negative elements; it also gave examples ...Read more
Author:Alberts, R; Fogwill, T; Keet, CMDate:May 2012This paper describes the features required of OWL (Web Ontology Language) to realise and enhance Indigenous Knowledge (IK) digital repositories. Several needs for Indigenous Knowledge management systems (IKMSs) are articulated, based on ...Read more
Author:Goliger, Adam M; Retief, JVDate:Oct 2007This paper presents a review of the types and magnitude of strong and extreme wind events that develop over the southern portion of the African continent. The origin of such events is given, together with selected statistics and examples of ...Read more
Author:Motara, YM; Irwin, Barry VWDate:Sep 2017Finding a preimage for a SHA-1 hash is, at present, a computationally intractable problem. SAT-solvers have been useful tools for handling such problems and can often, through heuristics, generate acceptable solutions. This research examines ...Read more
Author:Scholes, B; Lochner, Paul A; Schreiner, G; Snyman-Van der Walt, L; De Jager, MDate:Nov 2016The potential economic and energy security benefits of a large shale gas resource in the Karoo Basin could be substantial; as are both the positive and negative social and environmental issues associated with a domestic gas industry. Shale ...Read more
Author:Samaai, T; Pillay, Ruwendren; Janson, LDate:Apr 201933 species of shallow-water Demospongiae (Phylum Porifera) are described from Sodwana Bay, iSimangaliso Wetland Park, on the east coast of South Africa. Of the 33 species collected, 18 are redescribed from fresh material and 15 are new to ...Read more
Author:Ismail, Y; Khilo, N; Belyi, V; Forbes, ADate:Sep 2012We present a method for generating higher-order Bessel beams with z-dependent cone angles. Such fields, if engineered correctly, are shape invariant during propagation and thus do not suffer from a transition from a Bessel-shaped intensity ...Read more
Author:Daswa, Pfarelo; Chikosha, Silethelwe; Siyasiya, CWDate:Jun 2021Improvement of functional properties of binary TiPt shape memory alloy by adding a third element to partially substitute for Ti, has to date resulted in a decreased martensitic transformation temperature. In this study, the effect of substituting ...Read more
Author:Curle, UA; Moller, H; Wilkins, JDDate:Mar 2011It is demonstrated experimentally that using the Council for Scientific and Industrial Research Rheo Casting System and high pressure die casting it is possible to semi-solid process and cast into a shape high purity aluminium without a ...Read more
Author:Curle, UA; Möller, H; Wilkins, JDDate:Feb 2011It is demonstrated experimentally that by using the Council for Scientific and Industrial Research Rheo Casting system and high pressure die casting it is possible to semi-solid process and cast into a shape unmodified Al–Si binary eutectic ...Read more
Author:Saunders, MDate:Oct 2017This presentation discusses how the transformation of production systems, from R&D to the consumer, can drive innovation, sustainability and employment.Read more
Author:Coetzee, S; Harvey, F; Iwaniak, A; Cooper, Antony KDate:Aug 2013Every spatial data infrastructure (SDI) reflects an evolving concept related to the facilitation and coordination of the exchange and sharing of spatial data and services. Today, SDIs are evolving in response to the mushrooming of cloud-based ...Read more
Author:Anochie-Boateng, Joseph; Tutumluer, EDate:Jun 2009Shear strength properties of three oil sand materials were determined in the laboratory by simulating field loading conditions of large capacity mining trucks and shovels. Both monotonic triaxial compression and direct shear tests were performed ...Read more
Author:Kgaswane, EM; Nyblade, AA; Julià, J; Dirks, PHGM; Webb, SJDate:Jul 2012The structure of the crust in the environs of the Bushveld Complex has been investigated by jointly inverting high-frequency teleseismic receiver functions and 2–60 s period Rayleigh wave group velocities for 16 broadband seismic stations ...Read more
Author:Kgaswane, EM; Nyblade, AA; Julia, J; Dirks, PHGM; Durrheim, RJ; Pasyanos, MEDate:Dec 2009The nature of the lower crust across the southern African shield has been investigated by jointly inverting receiver functions and Rayleigh wave group velocities for 89 broadband seismic stations located in Botswana, South Africa and Zimbabwe. ...Read more