Author:Komba, Julius J; Maina, JW; Anochie-Boateng, Joseph; O'Connell, Johannes SDate:Jul 2012As part of the revision of the South African Pavement Design Method (SAPDM), laboratory testing was conducted to obtain the dynamic (Complex) modulus |E*| of hot-mix asphalt (HMA) samples. Dynamic modulus gives an indication of linear ...Read more
Author:Singh, GK; Claassens, JDate:Oct 2010This work addresses the inverse kinematics problem for the 7 Degrees of Freedom Barrett Whole Arm Manipulator with link offsets. The presence of link offsets gives rise to the possibility of the in-elbow & out-elbow poses for a given end-effector ...Read more
Author:Hunter, LDate:Feb 1973The breaking strength and extension of a range of wool worsted hosiery and weaving yarns were related to the average linear density of the yarn segment and that of the yarn at the point of rupture.Read more
Author:Makhari, A; Hawes, Nomashaka BN; Mturi, George AJ; Ojijo, Vincent ODate:Jul 2021Modifying bitumen is currently a common practice in South Africa. The asphalt pavement industry has seen an increase in use of different types of modifiers in an attempt to improve or extend the properties of bitumen. Common modifiers used ...Read more
Author:Sastrawan, J; Jones, C; Akhalwaya, I; Uys, H; Biercuk, MJDate:Aug 2016We introduce concepts from optimal estimation to the stabilization of precision frequency standards limited by noisy local oscillators. We develop a theoretical framework casting various measures for frequency standard variance in terms of ...Read more
Author:Goolab, Shivani; Roth, Robyn L; Crampton, Michael C; Van Heerden, HDate:Oct 2015Bacterial lipoproteins possess diverse structure and functionality, ranging from bacterial physiology to pathogenic processes. As such many lipoproteins, originating from Brucella are exploited as potential vaccines to countermeasure brucellosis ...Read more
Author:Mtsweni, Jabu SDate:12 Aug 2015oday, public-facing websites are virtually used across all different sectors by different types of organizations for information sharing and conducting core business activities. At the same time, the increasing use of mobile devices in Africa ...Read more
Author:Dudley, Angela L; Vette, C; Szameit, A; Forbes, ADate:Aug 2015Significant interest has been devoted to tailoring optical fields that transversely accelerate during propagation in the form of Airy, Weber and Mathieu beams. In this work, the authors introduce a new type of optical field that exhibits ...Read more
Author:Litvin, IA; Burger, L; Forbes, ADate:Sep 2013The self-reconstruction of superpositions of Laguerre–Gaussian (LG) beams has been observed experimentally, but the results appear anomalous and without a means to predict under what conditions this take place. In this Letter, we offer a ...Read more
Author:Luo, H; Vaivars, G; Nonjola, S; Rohwer, Mark B; Mathe, Mahlanyane KDate:Mar 2010Alkaline membrane fuel cell (AMFC) has been received increasing attention among the different types of fuel cells. Ammonium quaternized polymers such as poly (arylene ether sulfones) are being developed and studied as candidates of ionomeric ...Read more
Author:Luo, H; Vaivars, G; Agboola, B; Mu, s; Mathe, Mahlanyane KDate:Feb 2012The properties of alkali doped poly(2,5-benzimidazole) membrane with different alkali doping level for fuel cell application is reported in this work. The alkali doping level played an important role for the ion conductivity of the membrane. ...Read more
Author:Nonjola, SDate:Sep 2010Ammonium quaternized polymers such as poly (arylene ether sulfones) are being developed and studied as candidates of ionomeric materials for application in alkaline fuel cells, due to their low cost and promising electrochemical properties. ...Read more
Author:Motsi, GT; Shongwe, MB; Sono, Tleyane J; Olubambi, PADate:Feb 2016The plastic anisotropic characteristics of aluminum alloy 5083-H0 at varying strain rates were investigated using uniaxial tensile testing inside an ultra-high resolution FEG-SEM. The stress strain graphs obtained show that for the rolling ...Read more
Author:Motaung, DE; Malgas, GF; Ray, SS; Arendse, CJDate:Jun 2013The structural growth and optical and photovoltaic properties of the organic–inorganic hybrid structures of zinc oxide (ZnO)-nanorods/poly-3-hexylthiophene (P3HT) and two variations of organic polymer blends of ZnO/P3HT:C(sub60) fullerene and ...Read more
Author:Khamlich, S; McCrindle, R; Nuru, ZY; Cingo, N; Maaza, MDate:Jan 2013A cost-effective and environmentally friendly green chemical method, the so-called aqueous chemical growth (ACG) method, was used to deposit chromium/alpha-chromium(III) oxide, Cr/a-Cr2O3, monodispersed particles, for solar absorbers applications. ...Read more
Author:Khamlich, S; McCrindle, R; Nuru, ZY; Cingo, N; Maaza, MDate:Jan 2013A cost-effective and environmentally friendly green chemical method, the so-called aqueous chemical growth (ACG) method, was used to deposit chromium/alpha-chromium(III) oxide, Cr/a-Cr2O3, monodispersed particles, for solar absorbers applications. ...Read more
Author:Geldenhuys, CJDate:1985Annotated references to 519 publications are presented, together with keyword listings and keyword, regional, place name and taxonomic indices. This bibliography forms part of the first phase of the activities of the Forest Biome Task Group.Read more
Author:Endrody-Younga, SDate:Sep 1982A study of the composition, biology and impact of the arthropod fauna associated with dung and other decaying matter was carried out on the Nylsvley Nature Reserve and on a neighbouring farm from June 1975 to July 1976. A total of 100 638 ...Read more
Author:Jacobsen, NHGDate:Dec 1977A survey of the distribution, status and general ecology of amphibians, reptiles and mammals was undertaken on the Nylsvley Nature Reserve, Transvaal from mid-1974 to mid-1977 as part of the South African Savanna Ecosystem Project. A total ...Read more
Author:Bischof-Niemz, TDate:Dec 2016Annual new-build limits for solar PV and wind are constant in absolute terms but decrease relative to the size of the power system. Today: Both leading and follower countries install much more new solar PV capacity per year than what South ...Read more