Author:Sroor, H; Naidoo, Darryl; Courtial, J; Forbes, ADate:Feb 2018Mathematical self-similar fractals manifest identical replicated patterns at every scale. Recently, fractals have found their way into a myriad of applications. In optics, it has been shown that manipulation of unstable resonator parameters ...Read more
Author:Kakonke, Grace; Tesfaye, Tamrat; Sithole, Bishop B; Ntunka, MDate:Feb 2021South Africa is the biggest chicken meat producer in Southern Africa and generates about 258 million kg of waste feathers. Although some of this waste is beneficiated into animal feed and fertiliser there are problems in adequate digestion ...Read more
Author:Horn, REDate:Oct 1976A method is described by which cotton fabric is treated with phenolicformaldehyde resins and then dyed by immersion in solutions of stabilized salts which couple to the resins.Read more
Author:Edwards, ALDate:31 Aug 2010Noise-induced hearing loss (NIHL) negatively affects the quality of life of mine employees and costs mining companies large amounts in compensation claims. The prevention of NIHL requires early identification and recent evidence about the ...Read more
Author:Shatalov, M; Fedotov, I; Joubert, SVDate:Sep 2008A novel method of function approximation using an initial value, linear, ordinary differential equation (ODE) is presented. The main advantage of this method is to obtain the approximation expressions in a closed form. This technique can be ...Read more
Author:Land, KJ; Mbanjwa, MM; Korvink, JGDate:Oct 2013Microfluidic devices are commonly utilised for the manufacture of particles. In certain applications, cross linkers are required to manufacture these particles, and when introduced in continuous form will foul the microfluidic channels. We ...Read more
Author:Wepener, I; Richter, W; Joubert, ADate:Jan 2010This presentation addresses the replacement and repair of bone. There are four types of biomaterials; namely biotoxic, bioinert, bioactive and ioresorbable. The most abundant inorganic mineral in bone is hydroxyapatite, which is a good candidate ...Read more
Author:Land, K; Schneider, F; Potgieter, S; Korvink, JGDate:Sep 2009Microfluidic systems require numerous control valves in order to function properly. These valves form the basic unit of fluid handling within the microfluidic system. Many different valves have been designed and manufactured, both active and ...Read more
Author:Chikwamba, Rachel K; Lotter, T; Ramesaar, KDate:28 Feb 2006The demand for health products such as protein therapeutics and sub-unit vaccines to control infectious diseases far outweighs the current global production capacity of these molecules. These products are currently being produced in conventional ...Read more
Author:Kotzé-Jacobs, LDate:10 Oct 2012In this presentation the author provides insights into how novel polymer nanocomposites can be utilised in the extraction of heavy metals like Cr(VI) from polluted waters in order to provide purified water up to potable standards.Read more
Author:Rashamuse, KJ; Burton, SG; Cowan, DADate:Nov 2007Isolation and identification of bacterial isolates with specific ferulic acid (FA) esterase activity and cloning of a gene encoding activity. A micro-organism with ethyl ferulate hydrolysing (EFH) activity was isolated by culture enrichment ...Read more
Author:Hussien, HM; Katzis, K; Mfupe, Luzango P; Bekele, ETDate:Sep 2021Cognitive radio-based TV White Space (TVWS) is a promising idea which seeks to increase spectrum utilization by opportunistically accessing spectrum initially licensed to TV transmitters or incumbents. Orthogonal frequency multiple access ...Read more
Author:Green, JJ; Coetzee, SDate:Aug 2012The end state of an autonomous system in South Africa’s deep mines is a “fait accompli”. The current unacceptable safety records, and the increasing dangers as the mines get deeper, necessitate the removal of miners from the dangerous stope ...Read more
Author:Kleynhans, W; Salmon, BP; Wessels, Konrad JDate:Jul 2014The use of hyper-temporal MODIS time-series data for the detection of land cover change in South Africa has been an active research area the last few year. This paper expands on previous studies that show that this type of data can be effectively ...Read more
Author:Wen, L; Wang, X; Liu, GQ; Luo, H; Liang, J; Dou, SXDate:Mar 2018With the advancement of electrode materials for lithium-ion batteries (LIBs), it has been recognized that their surface/interface structures are essential to their electrochemical performance. Therefore, the engineering of their surface by ...Read more
Author:Seid, R; Majozi, TDate:Jan 2012This paper presents a mathematical technique for prediction of the optimal number of time points in short-term scheduling of multipurpose batch plants. The mathematical formulation is based on state sequence network (SSN) representation. The ...Read more