Author:Curle, A; Moller, H; Govender, GDate:2013The history of semi-solid metal forming and in particular rheo-high pressure die casting at the Council for Scientific and Industrial Research in South Africa is discussed. Processing flexibility is demonstrated on the Al-Si-Mg, Al-Mg-Si, ...Read more
Author:Zhang, Y; Roux, FX; McLaren, M; Forbes, ADate:2014The radial degrees of freedom of the biphoton states that are produced in spontaneous parametric down-conversion (SPDC) in the Laguerre-Gaussian (LG) basis are investigated, theoretically and experimentally. We calculated the theoretical ...Read more
Author:Mathuthu, M; Raseleka, RM; Forbes, A; West, NADate:Dec 2006Laser-induced breakdown spectroscopy (LIBS) is a non-intrusive technique that needs no sample preparation and even recently, quantitative measurements were done without the need for calibration standards. Much research has been done on the ...Read more
Author:Makinta, MJ; Brinders, JM; Smith, KADate:Oct 2005Irradiation has adverse effects on reproductive aspects such as spermatogenic cell population and cell malformation, leading to reduced sperm count and non-viable spermatozoa. This has overshadowed possible effects of radiation exposure on ...Read more
Author:Ogbodo, EU; Dorrell, DG; Abu-Mahfouz, Adnan MIDate:Jan 2021Background: A cognitive radio sensor network (CRSN)-based Smart Grid (SG) is a new paradigm for a modern SG. It is totally different from the traditional power grid and conventional SG. Currently, an SG uses a static resource allocation ...Read more
Author:Simpson, BRSDate:Jan 2002South Africa's national radioactivity measurement standard is maintained at a satellite laboratory in Cape Town by the National Metrology Laboratory (NML) of the Council-for Scientific and Industrial Research. Standardizations are undertaken ...Read more
Author:Vogel, JC; Fuls, A; Visser, EDate:Mar 2001High-precision radiocarbon dating of a millennium-old yellowwood tree from the Midlands of Natal shows that the tree-rings do, in general, record annual growth, but that both missing and false rings occur. At two places along the transect of ...Read more
Author:Ryan, PG; Steele, WK; Siegfried, WR; Vogel, JCDate:Nov 1992There are several problems associated with determining radiocarbon dates, particularly for organic material from Antarctica. However, this study attempts to find accurate measure of the length of time these radiocarbon dates have been established ...Read more
Author:Oschadleus, HD; Vogel, JC; Scott, LDate:Jan 1996The age of the peat, or 'lignite', layer in the Port Durnford Formation on the Zululand coast has been established to be about 70 kyr by means of the Th-230/U-234 disequilibrium dating technique. This date places the pent temporally at the ...Read more
Author:Loveday, Philip W; Long, Craig SDate:Dec 2019Ultrasonic guided waves have been shown to propagate large distances in continuously welded rail track.Read more
Author:Shackleton, CMDate:Mar 1999Woody community phenology was studied in the central lowveld, South Africa, over a twelve month period at three sites along a rainfall gradient, with both toplands and bottomlands sampled at each site. Each month, individual plants, in ...Read more
Author:Zunckel, M; Saizar, C; Zarauz, JDate:Apr 2003The aim in this paper is threefold: firstly to gain an initial understanding of rainwater chemistry in the northeast of Uruguay; secondly to identify possible sources that contribute to its chemical composition; and thirdly to establish a ...Read more
Author:Mayers, J; Evans, J; Foy, TDate:Oct 2001This report is about the changes taking place in South African forestry, the pros and cons of these changes and the prospects for a forest sector that can contribute to sustainable national development and local empowerment. Across many sectors ...Read more
Author:Mguda, Z; Faltenbacher, A; Van der Heyden, K; Gottlöber, S; Cress, C; Vaisanen, P; Yepes, GDate:Jan 2015In this paper we use the MareNostrum Universe Simulation, a large scale, hydrodynamic, non-radiative simulation in combination with a simple abundance matching approach to determine the ram pressure statistics for bent radio sources (BRSs). ...Read more
Author:Machaka, Ronald; Mwakikunga, Bonex W; Manikandan, E; Derry, TE; Sigalas, IDate:2011Despite hot pressing being the most popular method of consolidating B6O powder, the Raman spectrum of polycrystalline hot-pressed B6O was until now poorly understood. Yet, recent reports have contributed to the understanding of only high-pressure ...Read more
Author:Andreev, GN; Barzev, ADate:16 Dec 2003The ability of Raman spectroscopy to investigate chemical substances in water media was applied for studying the surface products of the chalcopyrite-sodium isopropyl xanthate flotation system. Performing the reaction in model conditions, ...Read more
Author:Mwakikunga, Bonex W; Sideras-Haddad, E; Forbes, A; Arendse, CDate:2008Novel optical and electrical properties of newly synthesized nano-wires of monoclinic WO3 and nano-belts of rutile VO2 have been investigated by Raman spectroscopy and thermochromism studies respectively. Phonon confinement is observed in the ...Read more
Author:Thackeray, MM; Rossouw, MH; Gummow, RJ; Liles, DC; Pearce, K; De Kock, A; David, WIF; Hull, sDate:Jun 1993A pure and highly crystalline form of ramsdellite-MnO2 has been synthesized by acid treatment of the spinels LiMn2O4 and Li2Mn4O9 at 95°C. Although the ramsdellite-MnO2 framework remains intact on lithiation at 70°C, the hexagonally-close-packed ...Read more
Author:Du Preez, M; Conroy, RM; Ligondo, S; Hennessy, J; Elmore-Meegan, M; Soita, A; McGuigan, KGDate:Sep 2011The authors report the results of a randomized controlled intervention study (September 2007 to March 2009) investigating the effect of solar disinfection (SODIS) of drinking water on the incidence of dysentery, nondysentery diarrhea, and ...Read more