Author:McLaren, M; Romero, J; Padgett, MJ; Roux, FS; Forbes, ADate:Sep 2013In this paper we consider geometrical two-photon optics of Bessel-Gaussian modes generated in spontaneous parametric down-conversion of a Gaussian pump beam. We provide a general theoretical expression for the orbital angular momentum (OAM) ...Read more
Author:Stewart, TJ; Ittmann, HWDate:1979A study of the economic distribution of maize throughout South Africa is reported. Although the problem of minimizing total transportation costs in such a situation is a classical one, and its solution is well known, there was in this case a ...Read more
Author:Fernandes, PJLDate:Mar 1998This article discusses the outcome of an investigation of the failure of copper tubes from cold water distribution system carrying potable water in a shopping centre. Samples of copper tubes from a cold water distribution system which had ...Read more
Author:De Beer, Morris; Sadzik, EM; Fisher, C; Coetzee, CHDate:Jul 2005This paper addresses the measurement (i.e. “fingerprinting”) of tyre loading and contact stress patterns associated with slow moving test tyres on the new Heavy Vehicle Simulator (HVS Mk IV+) of Gautrans. The two test tyres used on the HVS ...Read more
Author:De Beer, Morris; Fisher, C; Kannemeyer, LDate:Sep 2004The aim of this paper is to highlight the use of SIM (Stress-In-Motion) technology on typical heavy vehicles found at the N3-TCC (Traffic Control Centre), with illustrative examples on real world trucks on this highway. A summary of the ...Read more
Author:Mufhandu, Hazel T; Alexandre, Kabamba B; Gray, ES; Morris, L; Khati, MDate:Sep 2016We have previously shown that the aptamer, UCLA1, is able to inhibit HIV-1 replication in peripheral blood mononuclear cells (PBMCs) by binding to residues in gp120. In this study we examined whether UCLA1 was effective against HIV-1 subtype ...Read more
Author:Perrie, BD; Strauss, PJ; Du Plessis, LDate:Aug 2007Ultra thin continuously reinforced concrete pavements (UTCRCP), in literature also referred to as Ultra Thin Reinforced High Performance Concrete (UTHRHPC), have been used in Europe successfully as a rehabilitation measure on steel bridge ...Read more
Author:Du Plessis, L; Kilian, A; Mngaza, KDate:Jul 2014The design and use of ultra-thin reinforced concrete pavements (UTRCP) are well known and are implemented successfully in residential streets and low-volume roads. Various publications are available to assist engineers and contractors to ...Read more
Author:Shingange, Katekani; Swart, H; Mhlongo, Gugu HDate:Nov 2019Herein, we report on one-dimensional porous Au-modified LaFeO3 nanobelts (NBs) with high surface area, which were synthesized through the electrospinning method. The incorporation and coverage of Au nanoparticles (NPs) on the surface of the ...Read more
Author:Ombinda-Lemboumba, Saturnin; du Plessis, A; Botha, LR; Rohwer, EG; Steenkamp, CMDate:Oct 2010The ultrafast dynamics of Zinc Phthalocyanine was studied using trasient absorption pump probe spectroscopy. Zinc Phthalocyanine was excited (pumped) at 672nm and probed by a white light continuum. The pump-probe technique used in this study ...Read more
Author:Kekana, PT; Sithole, Bishop B; Ramjugemath, D; Pillay, LDate:Jul 2014The main aim of this project is to develop a method that can effectively extract lignin from Kraft black liquors from South African mills in the form that would be suitable for valorisation into high value products. In this study the effects ...Read more
Author:Kekana, Petrus T; Sithole, Bishop B; Ramjugernath, DDate:Feb 2019Ultrafiltration of black liquor was studied in three different modules, namely, radial cross flow, rectangular cross flow and stirred cell over a wide range of operating conditions. Effects of different cut-off membranes on the permeate flux ...Read more
Author:Loveday, Philip W; Wood, DDate:Jan 2006A non-destructive examination procedure based on a guided wave inspection approach is used for the acoustic examination of glass fibre reinforced composite rods. This paper contains an investigation into the characteristics of guided wave ...Read more