Author:Khomenko, MD; Makoana, Nkutwane W; Pityana, Sisa L; Mirzade, FKHDate:Jul 2021A new coupled heat transfer and solidification kinetics model is developed for the optimization of microstructure during laser additive manufacturing applications. The Johnson–Mehl–Avrami–Kolmogorov equation is applied in a self-consistent ...Read more
Author:Awuor, F; Djouani, K; Noel, G; Olwal, TDate:Sep 2011Link adaptation provides an efficient and flexible strategy to adapt transmission rates based on channel conditions. To attain distributed optimal local and global utility, network interference need to be mitigated therein allowing the users ...Read more
Author:Burd, CC; Du Toit, PJW; Uys, HDate:Oct 2014We have demonstrated simultaneous laser frequency stabilization of a UV and IR laser, to coupled transitions of ions in the same spectroscopic sample, by detecting only the absorption of the UV laser. Separate signals for locking the different ...Read more
Author:Haelterman, R; Bogaers, Alfred EJ; Degroote, J; Cracana, SDate:Mar 2017Many physics problems can only be studied by coupling various numerical codes, each modeling a subaspect of the physics problem that is addressed. Often, each of these codes needs to be considered as a black box, either because the codes were ...Read more
Author:Van der Walt, PG; Naude, J; Lubbe, SW; Hutcheson, PJ; Meyer, JP; Spencer, KCDate:Nov 2000One of the findings of SIMRAC Project GAP 520 dated March 1999 ('Investigate safety of rail vehicles and systems operating in South African gold mines') was that about 20% of accidents involving locomotives and rolling stock were during ...Read more
Author:Padayachee, I; Kotzé, Paula; Van der Merwe, ADate:2011The advent of the Internet and the World Wide Web has revolutionised practices in business, government, health, and education amongst others. In education, the Internet and World Wide Web opened new doors for teaching and learning, thereby ...Read more
Author:Tumba, NL; Naicker, Previn; Stoychev, Stoyan H; Killick, MA; Owen, GR; Papathanasopoulos, MADate:Jul 2022The human immunodeficiency virus type 1 (HIV-1) envelope glycoprotein (Env) mediates host cell infection by binding to the cellular receptor CD4. Recombinant Env bound to CD4 has been explored for its potential as an HIV vaccine immunogen as ...Read more
Author:Luo, H; Vaivars, G; Mathe, Mahlanyane KDate:Aug 2010In this paper, the proton exchange membrane prepared by covalent-ionically crosslinking water soluble sulfonated-sulfinated poly(oxa-p-phenylene-3,3-phthalido-pphenylene- oxa-p-phenylene-oxy-phenylene) (SsPEEK-WC) is reported. Compared with ...Read more
Author:Luo, H; Vaivars, G; Modibedi, Remegia M; Mathe, Mahlanyane KDate:May 2009The proton exchange membrane was prepared by covalent cross-linking sulfonated-sulfinated polyetheretherketone. The cross-linked membrane showed high proton conductivity (0.04 S/cm) with suitable water uptake, low methanol permeability (2.21 ...Read more
Author:Ntshabele, K; Isong, B; Abu-Mahfouz, Adnan MIDate:May 2021Low Power Wide Area Network (LPWAN) is a network technology that emanated from the swift advancement of the Internet of Things (IoT) market. It is characterized by low cost, long-range communications, low power consumptions, and better area ...Read more
Author:Phelp, D; Tulsi, K; Abdulla Al Masaood, HE; Eissa, MDate:Feb 2012During cyclone Gonu, a category 5 storm, which impacted the east coast of Oman in June 2007, a number of small craft harbours were severly damaged. Most of the breakwater structures were armoured with various sizes of rock protection. The Al ...Read more
Author:Napier, JALDate:Sep 2002The numerical solution of problems relating to crack fracture and failure can be accomplished using the displacement discontinuity boundary element method. This paper presents an extension to the normal formulation of this method to enable ...Read more
Author:Molobi, E; Sacks, N; Theron, MarithaDate:Apr 2022Laser engineered net shaping of a WC-10wt%FeCr cemented carbide showed cracking during deposition despite using a full factorial design of experiments matrix along with single and multiple objective optimization models to establish an optimal ...Read more
Author:Dumani, Nozonke; Mapiravana, JosephDate:Jan 2024The manufacturing of cement contributes to approximately 5-7% of global anthropogenic carbon dioxide emissions, necessitating the need for reducing the environmental impact. Limestone Calcined Clay Cement (LC3) has emerged as a promising ...Read more
Author:Maasdorp, FDV; Nadjiasngar, R; Inggs, MRDate:Oct 2014This paper investigates the theoretical placement of receivers in an Commensal Radar (CR), Doppler only tracking system with a single transmitter multiple receiver configuration. Theory, based on the Fisher Information matrix (FIM), is developed ...Read more
Author:Jermy, R; De Villiers, JDate:Nov 2015be
This paper presents two datasets for the purpose of calibrating, evaluating the calibration accuracy, and evaluating stereo vision accuracy of a pair of cameras. The authors provide a baseline that can be used as an initial comparison. ...Read more
Author:Le Roux, Alize; Khuluse, S; Naude, AJSDate:Aug 2015The core objective of this study was to create a social vulnerability map based on generally accepted variables that are indicative of drivers of social vulnerability, capturing the unique attributes of South African communities. The paper ...Read more
Author:Pandarum, Aradhna; Mbam, VuyoDate:Sep 2023South Africa (SA) is the 12th largest greenhouse gas (GHG) emitter in the world. Furthermore, the country has pledged to transition away from a carbon insensitive economy within the Conference of Parties (COP) thus highlighting the need to ...Read more
Author:Le Roux, Alize; Cooper, Antony K; Ludick, Chantel J; Arnold, Kathryn A; Mans, Gerbrand GDate:Jun 2021This chapter presents the "COVID-19 Vulnerability Dashboard" for South Africa, developed by the CSIR for the National Disaster Management Centre (NDMC). It maps vulnerability to COVID-19 for the whole of South Africa, down to the level of the ...Read more