Author:Dalton, A; Landman, WADate:Oct 2014Computing costs increase with an increase in global model resolution and ensemble size. This paper strives to determine the extent to which resolution and ensemble size affect seasonal forecast skill when simulating mid-summer rainfall totals ...Read more
Author:De Waal, A; Barnard, EDate:Nov 2010Topic models explain a collection of documents with a small set of distributions over terms. These distributions over terms define the topics. Topic models ignore the structure of documents and use a bag-of-words approach which relies solely ...Read more
Author:Van Zwieten, ACTM; Bulloch, JHDate:Feb 1993The present report describes a study aimed at assessing the influence of interstitial solute concentrations, in the form of carbon, nitrogen and oxygen, on the mechanical properties of a 40% Cr-Fe stainless steel. It’s observed that carbon ...Read more
Author:Mthunzi-Kufa, Patience; Forbes, A; Hawkins, D; Abrahamse, H; Karsten, AEDate:Jul 2006A variety of strategies have been utilised for prevention and treatment of chronic wounds such as leg ulcers, diabetic foot ulcers and pressure sores. Low Level Laser Therapy (LLLT) has been reported to be an invaluable tool in the enhancement ...Read more
Author:Forbes, A; Botha, L; Du Preez, N; Drake, TDate:2007Laser ultrasonics is currently the optimal method for non-destructive testing of composite materials in the aerospace industry. The process is based on a laser-generated ultrasound wave which propagates inside the composite. The response at ...Read more
Author:Adeyemi, AA; Akinlabi, ET; Mahamood, RM; Sanusi, KO; Pityana, Sisa L; Tlotleng, MonnammeDate:Sep 2017The influence of laser power on the microstructure of 17-4 PH stainless steel produced by laser metal deposition was investigated. Multiple-trackof 17-4 stainless steel powder was deposited on 316 stainless steel substrate using laser metal ...Read more
Author:Ndou, N; Akinlabi, ET; Pityana, Sisa LDate:Oct 2016The influence of laser power on the deposited of Ti64l4V/W composites was investigated. The energy flow rates were varied while every single other parameter were kept at a steady. The evolving microstructure and the hardness of the composites ...Read more
Author:Turner, PA; Reinartz, RDate:Feb 1989Stopes on three reef horizons and at various depths were examined in the vicinity of inter-panel leads. The general geometry of fractures in the vicinity of inter-panels leads is outlined. The extend of fracturing parallel to the siding between ...Read more
Author:Moller, H; Masuku, EPDate:2009Semi-solid metal processing results in liquid segregation at the surface of the components. The pitting behaviour of this surface layer of semi-solid metal processed alloy F357 was compared with the centre (or bulk) of cast plates in 3.5% ...Read more
Author:Shatalov, MY; Joubert, SV; Coetzee, CEDate:Jan 2011Standing waves can exist as stable vibrating patterns in perfect structures such as spherical bodies, and inertial rotation of the body causes precession (Bryan’seffect). However, an imperfection such as light mass anisotropy destroys the ...Read more
Author:Makgabutlane, M; Wright, CYDate:Sep 2013Pretoria receives a fair amount of solar ultraviolet radiation (UVR). Certain meteorological factors affect the amount of solar UVR that reaches the ground. The most dominant influencing meteorological factors are stratospheric ozone, cloud ...Read more
Author:Nkosi, Funeka; Palaniyandy, Nithyadharseni; Raju, Kumar; Ozoemena, KDate:Oct 2020Commercialization of lithium-manganese rich oxides (LMR-NMC) cathodes for lithium-ion batteries is hindered by shortcomings such as severe capacity fade and poor rate capability. This work reveals the synergetic effect of the structure and ...Read more
Author:Müller, H; Masuku, EP; Curle, UA; Pistorius, PC; Knutsen, RD; Govender, GDate:Mar 2011A201 aluminium alloy is a high strength casting alloy with a nominal composition of Al-4.6Cu-0.3Mg-0.6Ag. It is strengthened by the O(Al2Cu) phase and the ’(Al2Cu) phase during heat treatment. Further strengthening of this alloy system can ...Read more
Author:Raji, SA; Pityana, Sisa L; Popoola, API; Popoola, OM; Arthur, Nana KK; Tlotleng, MonnammeDate:Oct 2021In this work, the microstructure and nanoindentation hardness properties of Ti-Al-Si-xMo alloys produced through laser in-situ alloying using laser engineered net shaping (LENS) technology were investigated. The microstructures and phases ...Read more
Author:Omarjee, Aadila; Taljaard, Susan; Weerts, Steven P; Adams, JBDate:Nov 2020Land-based nutrient enrichment of estuarine waters is emerging as a major factor influencing pH and has been referred to as “the other eutrophication problem”. Small temporarily closed estuaries with high residence times are likely to be ...Read more
Author:Soclo, WP; Igue, AM; Mwenge Kahinda, Jean-Marc; Boukari, M; Agbossou, KEDate:Oct 2015The derivative function f of the cumulative particle-size distribution curve of certain soils has two (02) local maxima (two modes) in weight percentage for the particle-size ranges of sand and clay (one in the range of clays and the other ...Read more
Author:Salehiyan, Reza; Ray, Suprakas SDate:May 2018This article highlights the recent research achievements regarding the development of nanoclay-containing biodegradable composites of polylactide (PLA)-based immiscible blends. The structure–property relationships of particular blends, namely, ...Read more