Author:Nape, I; Mashaba, Nikiwe P; Mphuthi, N; Jayakumar, S; Bhattacharya, S; Forbes, AndrewDate:Mar 2021Vector beams are inhomogeneously polarized optical fields with nonseparable, quantum-like correlations between their polarization and spatial components, and hold tremendous promise for classical and quantum communication across various ...Read more
Author:Scott, L; Woodborne, SDate:2007Pollen analysis shed light on vegetation community structure over the last 23,000 year in the Western Cape. The pollen from dated hyrax faecal accumulations (hyraceum) relates to the evolution of climate and contributes to proxy records in ...Read more
Author:Lück-Vogel, Melanie; Rautenbach, K; Adams, J; Van Niekerk, Lara; Mbolambi, CikizwaDate:May 2016This paper examines the value of very high-resolution multispectral satellite imagery and LiDAR-derived digital elevation information for classifying estuarine vegetation types. Satellite images used are from the WorldView-2, RapidEye, and ...Read more
Author:Privette, JL; Tian, Y; Roberts, G; Scholes, RJ; Wang, Y; Caylor, KK; Frost, P; Mukelabai, MDate:Mar 2004The Kalahari Transect is one of several International Geosphere-Biosphere Programme (IGBP) transects designed to address global change questions at the regional scale, in particular by exploiting natural parameter gradients ( Koch et al., ...Read more
Author:Manzi, MSD; Hein, KAA; Durrheim, RJ; King, NDate:Feb 2014A model of the Ventersdorp Contact Reef (VCR) orebody at Kloof Gold Mine was derived by integrating 3D reflection seismic data with information derived from underground mine mapping and exploration drilling. The study incorporated the ...Read more
Author:Dye, PJ; Jacobs, SDate:17 May 2004The South African forestry industry perceives Process-based forestry models as important tools for improving predictions of growth and water use in forest plantations. The 3-PG process-based forest model was evaluated in South Africa using ...Read more
Author:Chetty, A; Kovács, J; Sulyok, Zs; Mészáros, A; Fekete, J; Domján, A; Szilágyi, A; Vargha, VDate:Jan 2013Poly(N-isopropylacrylamide-co-N,N"-methylene-bisacrylamide) (P(NIPAAm-co-MBA)) hydrogels were prepared in water using redox initiator. The copolymer composition at high conversion (> 95%) was determined indirectly by HPLC (high performance ...Read more
Author:Thackeray, MM; Rossouw, MH; De Kock, A; De la Harpe, AP; Gummow, RJ; Pearce, K; Liles, DCDate:15 Mar 1993Manganese dioxide has for many years found widespread use as a cathode material in aqueous Leclanche, zinc chloride and alkaline cells and, more recently, in nonaqueous lithium cells. However, despite the large number of polymorphic structures ...Read more
Author:Hakl, H; Le Roux, WHDate:Dec 2008Understanding airspace activity is essential for airspace control. Being able to detect vertical activity in aircraft allows prediction of aircraft intent, thereby allowing more accurate situation awareness and correspondingly more appropriate ...Read more
Author:Giddy, IS; Fer, I; Swart, S; Nicholson, Sarah-AnneDate:May 2023The seasonal warming of Antarctic Winter Water (WW) is a key process that occurs along the path of deep water transformation to intermediate waters. These intermediate waters then enter the upper branch of the circumpolar overturning circulation. ...Read more
Author:Govender, K; Alport, MJ; Mocke, G; Michallet, HDate:2002The cost-effective measurement of the velocity flow fields in breaking water waves, using particle and correlation image velocimetry, is described. The fluid velocities are estimated by tracking the motion of neutrally buoyant particles and ...Read more
Author:Durrheim, RJ; Haile, A; Roberts, MKC; Schweitzer, JK; Spottiswoode, SM; Klokow, JWDate:15 Apr 1998The violent failure of a peninsular remnant at a depth of 2300 m below surface occurred in a mine in the Carletonville Goldfield of South Africa, severely damaging a stope mining the Ventersdorp Contact Reef (VCR). At the rockburst site the ...Read more
Author:Padayachee, I; Van der Merwe, A; Kotzé, PaulaDate:Dec 2015In higher education institutions various VLSs have been formally adopted to support online teaching and learning. However, there has been little research on patterns of VLS use among educators. The purpose of the research was to provide a ...Read more
Author:Nupen, EMDate:Jun 1974This paper attempts to assess the present and future needs for such waters and the virus risk involved in their usage.Read more
Author:Bandyopadhyay, J; Al-Thabaiti, SA; Ray, SS; Bousmina, MDate:Mar 2014The carbon nanotubes (CNTs)-containing composites of poly(butylene succinate) (PBS) were prepared by melt-blending in a batch mixer with three concentrations by weight of CNTs: 1, 2 and 3 %. State of dispersion-distribution of the CNTs in the ...Read more
Author:John, Maya J; Jacob John, Maya; Jose, S; Varughese, KT; Thomas, SDate:2009This study explores the dynamic mechanical behavior of woven sisal fabric reinforced natural rubber composites. The influence of chemical modification on the viscoelastic properties has also been determined. Moreover, the effect of frequency ...Read more
Author:Al-Thabaiti, SA; Ray, SS; Basahel, SN; Mokhtar, MDate:Mar 2015This article reports the viscoelastic properties of poly[(butylene succinate)-co-adipate] (PBSA) nanocomposites. The nanocomposites of PBSA with various loadings of organically modified clay were prepared by melt-mixing in a batch-mixer. The ...Read more
Author:Napier, JAL; Malan, DFDate:Oct 1997A model is proposed for the direct mechanistic simulation of seismic activity and stress transfer effects in deep level mines. The model uses a discontinuum viscoplastic formulation to relate the rate of slip on a crack to the shear stress ...Read more
Author:Thabethe, S; Linganiso, E; Motaung, D; Mashapa, MG; Nkosi, S; Arendse, CJ; Mwakikunga, Bonex WDate:Nov 2013The procedures for the synthesis of amorphous e-FeSi/Si core–shell nanofibres by vapour transport in a CVD configuration are reported. Crystallite studies by the Williamson-Hall method show the sizes to be typically about 8.0 nm which agrees ...Read more