Author:Joubert, JW; Van Heerden, QuintinDate:Jul 2013Recent developments in agent-based transport simulation provide promising results. However, the agent-based approach is frequently criticized for its apparent dependence on vast amounts of, mostly unattainable, data. In this paper we show ...Read more
Author:Van Heerden, Quintin; Joubert, JWDate:Jul 2013Recent developments in agent-based transport simulation provide promising results. However, the agent-based approach is frequently criticized for its apparent dependence on vast amounts of, mostly unattainable, data. In this second paper of ...Read more
Author:Mabotja, M; Harris, S; Weerts, Steven P; Vivier, LDate:Jan 2022Presentation on the evaluation of plastic waste in the Durban Bay: concept design based on WILDOCEANS Blue Port project findings. Objectives of this study is to identify routes of entry of different plastic wastes into the port, their likely ...Read more
Author:Mabotja, Makolobe M; Harris, S; Weerts, Steven PDate:Jul 2019Aims of the study is to examine larval fish assemblages over reef and sand substrates of pre-identified biozones. Investigate possible physico-chemical variables responsible for the larval fish distributions. Test if the identified biozones ...Read more
Author:Mabotja, MM; Harris, S; Weerts, Steven PDate:Jul 2017Aims of the study is to understand spatial dynamics of larval fish assemblages in the KZN coastal marine environment (40-80m depths). Examine larval fish composition, abundance and distribution between different substrates (reef and sand) and ...Read more
Author:Pityana, Sisa L; Rossouw, RDate:Oct 2008The aim of this work was to produce crack-free thin surface layers consisting of binary (Al-Ni, Al-Fe) and ternary (Al-Ni-Fe) intermetallic phases by means of a high power laser beam. The laser surface alloying was carried out by melting Fe ...Read more
Author:Mabhali, Luyolo AB; Pityana, Sisa L; Sacks, NDate:Mar 2010Laser alloying of aluminium AA1200 was performed with a 4.4kW Rofin Sinar Nd:YAG laser to improve the surface hardness. Alloying was carried out by depositing Ni, Ti and SiC powders of different weight ratios on the aluminum substrate. The ...Read more
Author:Mabhali, Luyolo AB; Pityana, Sisa L; Rampedi, DLDate:Jul 2008Aluminium is used in industry for various applications due to its low cost, light weight and excellent workability, but lacks wear resistance and hardness. Laser alloying is used to improve surface properties such as hardness and wear resistance ...Read more
Author:Mabhali, Luyolo AB; Pityana, Sisa L; Rampedi, DLDate:Oct 2008The objective of this study was to improve the surface hardness and wear resistance of Al AA1200 by laser alloying with mixed Ni and Ti powders. This presentation reports on the experimental methods, the results and conclusionRead more
Author:Mabhali, Luyolo AB; Pityana, Sisa L; Sacks, NDate:Jul 2010Aluminium is vastly used in industry due to its low cost, light weight and excellent workability, but lacks in wear resistance and hardness. Laser alloying is used to improve the surface properties such as hardness by modifying the composition ...Read more
Author:Forbes, A; Schulze, C; Flamm, D; Dudley, Angela L; Duparre, MDate:Apr 2013We show how laser beam characterization may be done in real-time with digital holograms. We illustrate the power of the techniques by applying them to a variety of laser sources, from fibers to solid-state.Read more
Author:Forbes, ADate:Aug 2006Many analytical techniques exist to explore the propagation of certain laser beams in free space, or in a linearly absorbing medium. When the medium is nonlinearly absorbing the propagation must be described by an iterative process using the ...Read more
Author:Masina, Bathusile N; Bodkin, R; Mwakikunga, Bonex W; Forbes, ADate:Aug 2011This paper presents an implementation of a laser beam shaping system for both heating a diamond tool and measuring the resulting temperature optically. The influence the initial laser parameters have on the resultant temperature profiles is ...Read more
Author:Van Rooyen, Corney; Burger, H; Theron, MarithaDate:Jun 2009Laser cladding crack repair of austenitic stainless steel vessels subjected to internal water pressure was evaluated. The purpose of this investigation was to develop process parameters for in-situ repair of through-wall cracks in components ...Read more
Author:Kumar, S; Pityana, Sisa LDate:Mar 2010Modification of Aluminium surface by injecting, dispersing and melting TiB2 powder with the help of a laser beam promises to enhance tribological properties of Aluminium. The present work consists of making single lines and various overlapping ...Read more
Author:Lengopeng, T; Botes, A; Popoola, APIDate:Nov 2014This paper evaluates the effect of process parameters (laser power and scanning velocity) on clad layer height, heat affected zone (HAZ) width, metallurgical bonding to base metal and Vickers microhardness profiles of clad layers of various ...Read more
Author:Phume, L; Pityana, Sisa L; Meacock, C; Popoola, APIDate:Dec 2012The objectives of this study were to investigate laser surface coating of Ti6Al4V with preplaced Hafnium powder, and to determine the influence of the energy density on the characteristics of bonding and the microstructure.Read more
Author:Baloyi, N; Tlotleng, Monnamme; Meacock, Christopher; Pityana, Sisa L; Majumdar, JDDate:Nov 2012Laser coating is an advanced coating technology for improving the surface properties of various components. These coatings are extremely dense, crack-free and have non-porous microstructures. Coatings archived by laser based coating technology ...Read morecb
Author:Botha, L; Du Plessis, A; Uys, H; de Clercq, LDate:01 Sep 2010Coherent control of quantum dynamics in optical, molecular and biological systems is a rapidly advancing field with many possible applications. This field of study was originally motivated by the goal of steering photoreactions into specific ...Read more