Author:McLaren, MG; Forbes, A; Sideras-Haddad, EDate:Jul 2009Measuring microscopic forces and torques using optical tweezers, presented at the 54th Annual Conference of the South African Institute of Physics in 2009Read more
Author:Mtsweni, Jabu S; Ndlovu, Lungisani; Mthethwa, Sthembile N; Mkuzangwe, Nenekazi NPDate:Nov 2023Misinformation, disinformation, malinformation, and/or fake news have gained attention for good and bad in South Africa, especially since the COVID-19 pandemic. The research-based and non-research-based interventions to tackle misinformation ...Read more
Author:Rouault, Marjolaine J; Mouche, A; Collard, F; Johannessen, JA; Chapron, BDate:Jan 2010Surface current information collected over the Agulhas Current region and derived from the Doppler centroid anomalies of the Advanced Synthetic Aperture Radar (ASAR) are examined. The sources of errors and potential use of the radar surface ...Read more
Author:Dudley, Angela L; Litvin, I; Forbes, ADate:Jan 2012To measure the Orbital Angular Momentum (OAM) density of superposition fields two steps are needed: generation and measurement. An azimuthally-varying phase (bounded by a ring-slit) placed in the spatial frequency domain produces a higher-order ...Read more
Author:Milione, G; Dudley, Angela L; Nguyen, TA; Chakraborty, O; Karimi, E; Forbes, A; Alfano, RDate:Feb 2015We experimentally measured the self-healing of the spatially inhomogeneous states of polarization of vector Bessel beams. Radially and azimuthally polarized vector Bessel beams were experimentally generated via a digital version of Durnin's ...Read more
Author:Ebrahim-Trollope, R; Durrheim, RJ; Smith, GDate:Oct 2013The Richter or local magnitude scale (M(subL)) has been used, with some modifications, to measure the size of earthquakes since 1935. It has long been recognised that this single-number representation of a multi-dimensional phenomenon is ...Read more
Author:Sebopetse, Nakampe S; Burger, Chris R; Mofolo, Raarone OM; Lysko, Albert ADate:Apr 2021This work discusses how the TCP window size affects the throughput and its measurements and estimated packet delivery delay on two experimental setups using freely available tools JPerf and PsPing. The first setup is a direct connection between ...Read more
Author:Machio, Christopher N; Nyabadza, D; Chikwanda, HK; Phasha, M; Sibanda, VMDate:Jun 2009A Ti-10wt.%Mg powder alloy has been produced by mechanical alloying. Elemental powders of Ti and Mg were ball milled in a Zoz-Simoloyer CM01 for 16 and 20 hours under argon. Mechanical alloying was followed by XRD, SEM and particle size ...Read more
Author:Tlotleng, Monnamme; Akinlabi, E; Shukla, M; Pityana, Sisa LDate:Feb 2014Coatings of commercial pure titanium (CP)-Ti and HAP bio-ceramic were synthesised on Ti-6Al-4V substrate using laser assisted cold spray (LACS) deposition technique. The LACS system comprised of 4.4 kW Nd:YAG laser system, AT-12000HPHV 5000PSI ...Read more
Author:Pedrazzoli, D; Tuba, F; Khumalo, VM; Pegoretti, A; Karger-Kocsis, JDate:2014In this work the influence of synthetic boehmite alumina (BA) nanoparticles with various surface treatments on the morphology, crystallization behavior and mechanical properties of polypropylene copolymer (PP) nanocomposites was studied. In ...Read more
Author:Agbakoba, Victor C; Hlangothi, P; Andrew, Jerome E; Mathew, Maya JDate:Sep 2022There is a growing need for diversified material feedstock for 3D printing technologies such as fused deposition modelling (FDM) techniques. This has resulted in an increased drive in the research and development of eco-friendly biopolymer-based ...Read more
Author:Machaka, Ronald; Mwakikunga, Bonex W; Manikandan, E; Derry, TE; Sigalas, I; Herrmann, MDate:Sep 2011Results on a systematic study on the effects of ion implantation on the near-surface mechanical and structural properties of boron suboxide (B6O) prepared by uniaxial hot pressing are reviewed. 150 keV fluorine ions at fluences of up to 5.0 ...Read more
Author:Phiri, G; Sadiku, ER; Khoathane, MCDate:Oct 2012In recent years, considerable attention has been given by aircraft manufacturers to the development and utilisation of natural fibres
instead of synthetics. This is because natural fibres are a renewable raw material
and their availability ...Read more
Author:Pennefather, RC; Boone, DHDate:1996Cyclic oxidation tests were performed on a large variety of commercially available overlay coatings. The results confirmed that the composition of the coating as well as the processing method of the coating can affect the life of the system. ...Read more
Author:Pennefather, RC; Boone, DHDate:1995Cyclic oxidation tests were performed on a large variety of commercially available overlay coatings. The results confirmed that the composition of the coating as well as the processing method of the coating can affect the life of the system. ...Read more
Author:Du Plessis, JJL; Belle, BK; Vassard, PSDate:Jan 1999The primary objective of this report was to control the environment to ensure that dust and methane levels were within the regulating requirements. The mining industry, through the SIMRAC process, assigned the CSIR-Miningtek to test and ...Read more
Author:Hamdan, MHM; Siregar, JP; Thomas, S; John, Maya J; Jaafar, J; Tezera, CDate:May 2019Natural fibre acts as a significant replacement for the known synthetic fibre that tends to cause critical environmental issues. Hence, the hybridization of natural fibre reinforcement has been considered as one of the strategies in reducing ...Read more
Author:Mutombo, K; Du Toit, MDate:2010Semi-automatic and automatic pulsed gas metal arc welding (GMAW) of aluminium alloy 5083 with ER5356 filler wire causes considerable softening in the weld. The tensile strength of dressed automatic welds approaches that of the base metal, but ...Read more