Author:Von Bergmann, H; Forbes, A; Roberts, T; Botha, LDate:2007In this paper the author’s present results on the influence of acoustic waves on the output laser beam from high repetition rate TEA CO2 lasers. The authors show that acoustic waves generated inside the cavity lead to deterioration in beam ...Read more
Author:Ameh, AE; Fatoba, OO; Musyoka, Nicholas M; Petrik, LFDate:Jan 2017In this study zeolite NaA with different crystal sizes and % crystallinity was prepared from a clear solution extract of fused fly ash. Sodium aluminate or aluminium hydroxide was used to adjust the aluminium content in the fused fly ash ...Read more
Author:Du Plessis, A; Botha, GN; Botha, LRDate:Jul 2011Results from experiments aimed at bimolecular chemical reaction control of CO and H2 at room temperature and pressure, without any catalyst, using shaped femtosecond laser pulses are presented. A stable reaction product (CO2) was measured ...Read more
Author:Hemp, DA; Goldbach, ODDate:Sep 1990In this report the seismicity at three different sites was investigated during mining with backfilled and mining without backfill. In order to evaluate the effectiveness of backfill as regional support in reducing seismicity. The seismic ...Read more
Author:Rampersad, Ashiel; George, Theresa B; Mokoena, Refiloe; Mgangira, Martin B; Gräbe, PJDate:Jul 2018The contamination of railway ballast (referred to as ballast fouling) is commonly caused by ballast particle degradation, external debris fouling due to surface spillage and clay fouling due to subgrade pumping. Intrusion of these fines in ...Read more
Author:Sikhwivhilu, LM; Ray, SS; Coville, NJDate:Mar 2009A hydrothermal treatment of titanium dioxide (TiO2) with various bases (i.e., LiOH, NaOH, KOH, and NH4OH) was used to prepare materials with unique morphologies, relatively small crystallite sizes, and large specific surface areas. The ...Read more
Author:Mthunzi-Kufa, Patience; Forbes, A; Hawkins, D; Abrahamse, H; Karsten, AEDate:2005A variety of strategies have been utilised for prevention and treatment of chronic wounds such as leg ulcers, diabetic foot ulcers and pressure sores1. Low Level Laser Therapy (LLLT) has been reported to be an invaluable tool in the enhancement ...Read more
Author:Mofokeng, Tladi G; Ojijo, Vincent O; Ray, Suprakas SDate:Oct 2016This paper reports on how the blend ratio and morphology influence the mechanical, thermal, thermomechanical, and rheological properties of poly(propylene) (PP)/low density polyethylene (LDPE) blends. The blend morphology is composed of the ...Read more
Author:Agwuncha, SC; Ray, SS; Jayaramudu, J; Khoathan, C; Sadiku, RDate:Jan 2015Blends of polylactide (PLA) and poly(e-caprolactone) (PCL) were melt-processed with boehmite (BAI) nanoparticles to produce ternary biocomposites with the intent of broadening the potential applications of PLA. The mechanical properties of ...Read more
Author:Sikhwivhilu, LM; Kesavan Pillai, Sreejarani; Hillie TKDate:Oct 2010Tin oxide (SnO2) nanoparticles with size range of 19 to 100 nm were successfully synthesized using wet chemical process (i.e. chemical precipitation and sol-gel processes). The results showed that variation of citric acid concentration directly ...Read more
Author:Matseke, Mphoma, S; Zheng, Haitao; Mathe, Mkhulu K; Carleschi, E; Doyle, BDate:Dec 2021Recently, several researchers have found that the manganese ferrite (MnFe2O4) nanoparticle can be a promising candidate for the oxygen reduction reaction (ORR). However, the MnFe2O4 nanoparticles still face challenges on their ORR activity ...Read more
Author:Wessels, Konrad J; Bachoo, AK; Archibald, SDate:May 2009Deriving date-specific phenometrics from different multi-day MODIS composite data can potentially yield very different results. The objectives of this study were therefore to quantify the differences between (i) using 8-day vs. 16-day MODIS ...Read more
Author:Maina, JW; Ozawa, Y; Matsui, KDate:Jul 2008Each layer in a pavement structure is compacted during construction. Moreover, since the compaction process is carried along the same direction, it is well known that horizontal and vertical mechanical properties in each layer differ. But ...Read more
Author:Jansen van Vuuren, J; Grobler, M; Zaaiman, JDate:Mar 2012In South Africa, cyber security has been identified as a critical component contributing towards National Security. More rural communities are becoming integrated into the global village due to increased hardware and software corporate ...Read more
Author:Jacobs, V; Anandjiwala, RD; Maaza, MDate:Nov 2009Electrospinning is a simple method of producing nanofibers by introducing electric field into the polymer solutions. We report an experimental investigation on the influence of processing parameters and solution properties on the structural ...Read more
Author:Mason, S; Ballot, P; Cottrell, J; Currie, J; Heap, ADate:Jul 1998The project has produced information and methodologies for use by designers, mine managers and engineers to improve the health and safety associated with the use of trackless vehicles in mines. The project deliverables focus on assisting; ...Read more
Author:Mofolo, MRO; Lysko, Albert A; Clarke, WADate:Sep 2012The dimensions of an antenna system defines its performance. This implies proper calibration and fabrication process are vital. Thus, there is a need to investigate the influence of the variations in the dimensions of the antenna on its ...Read more
Author:Aramide, B; Popoola, P; Sadiku, R; Jamiru, T; Pityana, Sisa LDate:Nov 2021Laser cladding is an additive manufacturing technology utilised in surface strengthening, modification, and repair of components subjected to adverse working conditions, such as tillage tools, which is accomplished by adding functionally ...Read more
Author:Mthunzi-Kufa, PatienceDate:Aug 2012Stem cells are rich in proteins, carbohydrates, deoxyribonucleic acid (DNA), ribonucleic acid (RNA) and various other cellular components which are responsible for a diversity of functions. Mostly the building blocks of these intracellular ...Read more
Author:Moyo, Lumbidzani; Ray, Suprakas S; Sebati, Ngwanamohuba W; Ojijo, Vincent ODate:Mar 2017The processing and properties of layered double hydroxides (LDHs)-containing polypropylene (PP) composites have been studied extensively. However, no detailed studies have reported on how stearic acid (SA)-intercalated and SA-coated LDHs ...Read more