Author:Jafta, CJ; Roos, WD; Terblans, JJ; Asante, JKO; Ozoemena, KIDate:Jul 2011Previous experimental investigations have only shown, without explanation, that the pre-exponential factor (D0), in the diffusion coefficient of Sb segregating in Cu, is dependent on the surface orientation of a crystal. In this study, the ...Read more
Author:Tshwane, David M; Modiba, RosinahDate:Nov 2022Ti2AlV alloys are commonly employed as structural materials in electronics, metallurgy, and other industries because of their outstanding properties. Knowledge about their surface properties is lacking and limited at the atomic level. In this ...Read more
Author:Masina, Bathusile N; Forbes, A; Ndwandwe, MDate:Jul 2006Diamond has the highest thermal conductivity among known materials, and as such finds uses as an industrial tool in areas where dissipation of excess heat is a requirement. In this investigation we set up a laser system to heat a diamond ...Read more
Author:Tshabalala, Lerato C; Pityana, Sisa LDate:Mar 2016Traditional abrasive techniques such as grinding and lapping have long been used in the surface conditioning of engineering materials. However, in the processing of hard and brittle materials like silicon nitride (Si(sub3)N(sub4)), machining ...Read more
Author:Tshabalala, Lerato C; Pityana, Sisa LDate:Mar 2016Traditional abrasive techniques such as grinding and lapping have long been used in the surface conditioning of engineering materials. However, in the processing of hard and brittle materials like silicon nitride (Si(sub3)N(sub4)), machining ...Read more
Author:Tshabalala, Lerato C; Ntuli, CP; Fwamba, JC; Popoola, P; Pityana, Sisa LDate:Jan 2017Femtosecond laser surface micromachining is a technique in which an ultrashort pulse laser beam is focused to dimensions of a few microns inside or on the surface of the substrate. In this paper, surface texture transformation behaviour of ...Read more
Author:Tagliabue, A; Sallée, J-P; Bowie, AR; Lévy, M; Swart, S; Boyd, PWDate:Apr 2014Low levels of iron limit primary productivity across much of the Southern Ocean. At the basin scale, most dissolved iron is supplied to surfacewaters from subsurface reservoirs, because land inputs are spatially limited. Deep mixing in winter ...Read more
Author:Rorke, DCS; Lekha, Prabashni S; Kana, GEB; Sithole, Bishop BDate:Jun 2021This study optimizes a novel surfactant-assisted green liquor dregs (GLD) pretreatment of paper mill sludge (PMS), both of which are wastes from the kraft pulping industry, using a combined Response Surface Methodology (RSM) design. Optimized ...Read more
Author:Osifeko, MO; Hancke, GP; Abu-Mahfouz, Adnan MIDate:Nov 2021The boring and repetitive task of monitoring video feeds makes real-time anomaly detection tasks difficult for humans. Hence, crimes are usually detected hours or days after the occurrence. To mitigate this, the research community proposes ...Read more
Author:Leach, AR; Naidoo, Kavendra; Balt, KD; Rangasamy, T; Spencer, DDate:Dec 2002A primary output of this project has been the development of an accompanying guidebook, which summarises methodologies for recognising and categorising
the occurrence of non-standard or anomalous conditions, and provides guidelines ...Read more
Author:Brink, AVZ; Hagan, TO; Spottiswoode, SM; Malan, DF; Glazer, SN; Lasocki, SDate:Mar 2000The development of techniques to quantify the potential for rockmass instability that may result in rockbursts, has been a priority for researchers in the South African gold mining industry for some decades. These techniques include numeric ...Read more
Author:Manqele, Lindelweyizizwe S; Dlodlo, M; Coetzee, Louis; Sibiya, Mhlupheki GDate:Sep 2017The usage of the service selection approaches across different dynamic service provisioning environments has increased the challenges associated with an effective method that can be used to select a relevant service. The use of service selection ...Read more
Author:Ramotsoela, D; Abu-Mahfouz, Adnan MI; Hancke, GPDate:Aug 2018The increased use of IndustrialWireless Sensor Networks (IWSN) in a variety of different applications, including those that involve critical infrastructure, has meant that adequately protecting these systems has become a necessity. These ...Read more
Author:Pretorius, Morne; Mthethwa, Sthembile NDate:Sep 2019There are challenges and trade-offs associated with building secure decentralised systems that incorporate resource constrained devices into the Internet ecosystem, particularly the Internet of things. Introducing distributed ledgers solves ...Read more
Author:Frith, RDate:Sep 2002This report describes the findings and outcomes relating to SIMRAC Project COL802
entitled “Survey of Horizontal Stresses in Coal Mines from Available Measurements
and Mapping”. And also contains detailed review of the role of horizontal ...Read more
Author:Thothela, NP; Markus, ED; Masinde, M; Abu-Mahfouz, Adnan MIDate:Dec 2020Food security in Africa and the rest of the globe has come under tremendous threat, meaning that agriculture which is the driving force behind many economies is under threat. Seventy per cent of the food produced in sub-Saharan Africa is ...Read more
Author:Lehong, C; Isong, B; Lugayizi, F; Abu-Mahfouz, Adnan MIDate:Nov 2020The Adaptive Data Rate (ADR) is used in LoRaWAN to ensure optimized data rates and transmission powers for static end devices. However, its implementation is still new, and therefore, its functionalities are limited. Multiple proposals have ...Read more