Author:Siyakatshana, Njabulo; Ubbink, O; Kekana, J; Wessels, GDate:Jan 2011The Kyoto Protocol and its related instruments have increased awareness of the phenomenon of global warming. The two main so-called greenhouse gases deemed to cause this effect have been identified as CO2 and CH4. Other greenhouse gases include ...Read more
Author:Veerasamy, Namosha; Cheyne, CJDate:Nov 2007Users of computer systems may often require the private transfer of messages/communications between parties across a network. However, unwanted interception/sniffing of such communications is also a possibility. An elementary stealthy transfer ...Read more
Author:Jansen van Rensburg, Gerhardus J; Kok, S; Wilke, DNDate:Oct 2017Different roll pass reduction schedules have different effects on the through-thickness properties of hot-rolled metal slabs. In order to assess or improve a reduction schedule using the finite element method, a material model is required ...Read more
Author:Ausmeier, Natalie J; Celik, TDate:Feb 2017Virtual Reality (VR) is widely used in training simulators of dangerous or expensive vehicles such as aircraft or heavy mining machinery. The vehicles often have very complicated controls that users need to master before attempting to operate ...Read more
Author:Vleggaar, R; Horak, RM; Maharaj, VJDate:Feb 1993Incorporation studies of [2-(2)H(3),2-(13)C].acetate and different [2H, 13C]-labelled mevalonolactones into verruculogen established the stereochemical course of ring C formation in fumitremorgin B, which results in the loss of stereochemical ...Read more
Author:Andrew, J; Hanuman, A; Sithole, Bishop BDate:2011The objective of this study was to demonstrate the applicability of the new methods by undertaking stickies audits in a newsprint and a packaging mill to test the sensitivity of the methods to detect changes in the concentration of stickies ...Read more
Author:Mtsweni, Jabu S; Abdullah, HDate:Oct 2015Computer Science (CS) enrolments at higher education institutions across the globe remain low in comparison to other disciplines. The low interest in CS is often attributed to students’ misconceptions about the discipline, such as CS being ...Read more
Author:Mtsweni, Jabu S; Abdullah, HDate:Oct 2015Computer Science (CS) enrolments at higher education institutions across the globe remain low in comparison to other disciplines. The low interest in CS is often attributed to students’ misconceptions about the discipline, such as CS being ...Read more
Author:Ncube, EN; Steenkamp, Paul A; Madala, NE; Dubery, IADate:Sep 2016Centella asiatica is a perrenial herb that grows in tropical regions with numerous medicinal properties mostly attributed to the presence of pentacyclic triterpenoids. Interestingly, this plant also possess a significant amount of ...Read more
Author:Kekana, Paul; Sithole, Bishop B; Ramjugernath, DDate:Dec 2016Ultrafiltration of lignin from black liquor was carried out in a stirred batch cell using polyethersulfone membranes. Parameters such as operating pressure, feed concentration, stirring rate and membrane cut-off size were varied and their ...Read morecb
Author:Giddy, Isabelle; Swart, S; Du Plessis, Marcel; Thompson, AF; Nicholson, Sarah-AnneDate:Mar 2021In the sea-ice-impacted Southern Ocean, the spring sea-ice melt and its impact on physical processes set the rate of surface water mass modification. These modified waters will eventually subduct near the polar front and enter the global ...Read more
Author:Roux, FSDate:Sep 2013This presentation introduces the field and subfield of Stochastic Singular Optics. Statistical optics calculations provide expressions for various quantities and the complexity of these expressions and their derivatives present challenges in ...Read more
Author:Roux, FSDate:Sep 2014The study of optical vortices in stochastic optical fields involves various quantities, including the vortex density and topological charge density, that are defined in terms of local expectation values of distributions of optical vortices. ...Read more
Author:Butgereit, L; Botha, RADate:May 2011“Dr Math” is a facility where primary and secondary school pupils can use MXit on their cell phones to get help with their mathematics homework. Pupils use an abbreviated “MXit lingo” leaving out most vowels and substituting various numerals ...Read more
Author:Roberts, MKCDate:Dec 1995This project had two objectives namely: Develop a rationale for the design of stope support systems. Determine support resistance criteria for the support of stope gullies for both static and dynamic loading and develop improved support systems ...Read more
Author:Naidoo, Kavendra; Leach, AR; Spencer, DDate:Aug 2002The report indicates that best practices for gully layouts have been well recognized, but often poorly applied for many years. Recommendations provided in this report do not attempt to develop any new techniques for gully protection. The ...Read more
Author:La Grange, CCDate:1951This paper investigates the storage of coal with regards to specifically coal deterioration and combustion properties.Read more
Author:La Grange, CCDate:1951Although the storage of coal is probably almost as old as its use and is practiced on a smaller or larger scale by all coal consumers, there are certain aspects and problems associated with coal storage, which require very careful consideration ...Read more
Author:Akroyd, G; Cenko, A; Piranian, A; Jamison, Kevin A; Malcolm, TDate:Jun 2017The Australian Maritime Safety Authority (AMSA) plans to replace Dornier 328 turboprops with Bombardier Challenger 604 special mission jets modified for search and rescue (SAR). Similarly configured CL-604 Multi-Mission Aircraft are in service ...Read more