Author:Modibedi, Remegia MDate:Dec 2011Alternative energy resources are needed to alleviate the energy crisis. Fuel cells are one of the examples to help solve the problem. The main goal of this research is to reduce the amount of Pt required in fuel cells. Thus the outcome of ...Read more
Author:Booth, R; Meyer, T; Varzinczak, IDate:Sep 2012We introduce Propositional Typicality Logic (PTL), a logic for reasoning about typicality. We do so by enriching classical propositional logic with a typicality operator of which the intuition is to capture the most typical (or normal) ...Read more
Author:Fourie, Nicolene MRDate:Aug 2023This paper discusses the policy environments of two acts in South Africa, the South African Spatial Data Infrastructure Act (Act 54 of 2003) (SDI Act) and the Promotion of Access to Information Act, 2000 (Act 2 of 2000), which promote ...Read more
Author:Steyn, MaronelDate:01 Sep 2010Sub-Sahara Africa continues to be the region most affected by the Human Immunodeficiency Virus/Acquired Immunodeficiency Syndrome (HIV/AIDS) (WHO, 2009). South Africa alone is home to 14 % of the world’s HIV positive population (UNAIDS, 2006). ...Read more
Author:Mokonyama, Mathetha T; Kistan, Kenny FDate:Apr 2008Based on the life cycle dynamics of the South African population, the paper investigates the implications of such dynamics on the design requirements of public transport services. The life cycle dynamics considered in this paper refer ...Read more
Author:Meissner, RichardDate:May 2015This study report on the presentation about the PULSE cube: Paradigms and theories for creating opportunities and solving problems.Read more
Author:Jacobs, Cobus; Kriel, S; Bollig, C; Jones, TDate:Jul 2006This presentation provides the overview of what laser pulse energy control is and why we need it. The simulation, experimental setup and results are shownRead more
Author:Botha, N; Botha, L; Du Plessis, A; Uys, H; Schoewer, HDate:Oct 2010The design of the pulse shaping setup as well as factors taken into account in choosing a specific setup will be discussed. We investigate the generation of simple shaped pulses to test our pulse shaper setup. Difference frequency mixing is ...Read more
Author:Botha, N; Botha, L; Du Plessis, ADate:Jul 2009Femtosecond pulse shaping can be done by different kinds of pulse shapers, such as liquid crystal spatial light modulators (LC SLM), acousto optic modulators (AOM) and deformable and movable mirrors. A few applications where pulse shaping is ...Read more
Author:Debelo, NG; Dejene, FB; Roro, Kittessa TDate:Apr 2017The influence of target to substrate distance (dts) on the structural, morphological and photoluminescence (PL) properties of commercially obtained KY3F10 : Ho3+ phosphor thin films prepared by pulsed laser deposition is investigated for dts ...Read more
Author:Yalisi, B; Roro, Kittessa T; Tile, N; Forbes, ADate:Jul 2011Due to their excellent properties CNTs is believed to be the best candidate to be an absorbing elements in the composite. “Stoichiometric transfer” makes PLD a suitable candidate for the composite growth. PLD experimental setup is discussed. ...Read more
Author:Van Bennekom, A; Berndt, F; Rassool, MNDate:Apr 2001This paper presents a collection of pump impeller failures that have been encountered during the consulting activities at the University of the Witwatersrand and the Plant Infrastructure and Pipelines Centre at the Council for Scientific and ...Read more
Author:Bernt, F; Van Bennekom, ADate:Apr 2001During operation, pump shafts usually suffer from degradation as a result of corrosion and/or mechanical degradation, usually in the form of fatigue failures. In many cases corrosion precedes fatigue failure and can actually accelerate the ...Read more
Author:Halland, YDate:30 Sep 2002With the rapid development of the Internet and Worldwide Web over the last 10 years, shopping online is no longer a novelty. Virtually (excuse the pun) anything can be bought online these days. From serious scientific information to ready ...Read more
Author:Serwale, Matsie R; Coetsee, T; Fazluddin, ShahedDate:May 2020The CSIR is developing a process to produce commercially pure (CP) Grade 4 titanium metal powder via direct metallothermic reduction of TiCl4. Crude titanium produced by this method is inevitably contaminated with unreacted reducing metal and ...Read more
Author:Serwale, MR; Coetsee, T; Sole, KC; Fazluddin, ShahedDate:Dec 2022The CSIR-Ti process employs lithiothermic reduction of titanium tetrachloride feedstock to produce titanium sponge. The product is therefore contaminated by a range of lithium and chloride species. In this study we examine the effects of ...Read more
Author:Sroor, H; Lisa, Nyameko; Naidoo, Darryl; Litvin, Ihar; Forbes, ADate:Apr 2018Creating high-quality vector vortex (VV) beams is possible with a myriad of techniques at low power, and while a few studies have produced such beams at high power, none have considered the impact of amplification on the vector purity. Here ...Read more
Author:Bidwell, NJ; Winschiers-Theophilus, H; Kapuire, GK; Rehm, MDate:Sep 2011Designing interactions with technologies that are compatible with rural wisdom and skills can help to digitally enfranchise rural people and, thus, contribute to community cohesion in the face of Africa’s urbanization. Oral information has ...Read more
Author:Van der Walt, M; Cooper, Antony K; Netterberg, I; Rubidge, BSDate:Nov 2015A geographical information system (GIS) database was compiled of Permo-Triassic tetrapod fossils from the Karoo Supergroup in South African museum collections. This database is the first of its kind and has great time applicability for ...Read more
Author:Dudley, Angela L; Rop, R; Litvin, IA; Lopez-Mariscal, C; Roux, FS; Forbes, ADate:Aug 2012We experimentally generated superpositions of higher-order Bessel beams that possess no global orbital angular momentum (OAM), yet exhibit an angular rotation in their intensity profile as the field propagates. The digital holograms encoded ...Read more