Author:McLaren, M; Sidderas-Haddad, E; Forbes, ADate:Sep 2011It is now well known that matter may be trapped by optical fields with high intensity gradients. Once trapped, it is then possible to manipulate microscopic particles using such optical fields, in so-called optical tweezers. Such optical ...Read more
Author:Mosangi, Damodar; Moyo, Lumbidzani; Kesavan Pillai, Sreejarani; Ray, Suprakas SDate:Oct 2016In this study, a pharmaceutically active ingredient, acetyl salicylic acid (ASA), was intercalated into ZnAl layered double hydroxide (LDH). The LDH–ASA nanohybrid material was characterized by XRD, FTIR, SEM, ICP-MS, TEM and TGA. Successful ...Read morecb
Author:Olwal, TO; Masonta, Moshe TDate:Nov 2012This study has presented the End to End (E2E) upper bound capacity limits for high performance mesh nodes that can be deployed
in rural and remote areas. The achievable capacity limits for both irregular and clustered placements of nodes ...Read more
Author:Olwal, T; Masonta, Moshe T; Mekuria, Fisseha; Roux, KDate:Aug 2012Next generation fixed wireless broadband networks have immensely been deployed as mesh networks in order to provide and extend access to the internet. These networks are characterised by the use of multiple orthogonal channels. Nodes in the ...Read more
Author:Kumar, Neeraj; Fosso-Kankeu, E; Ray, Suprakas SDate:May 2019The development of new synthesis approaches for MoS2 is necessary to achieve controlled morphologies and unique physicochemical properties that can improve its efficiency in particular applications. Herein, a facile one-step hydrothermal route ...Read more
Author:Meiklejohn, C; Goss, H; Whisken, JDate:Nov 2008This paper presents the CSIR’s contribution to technical advances in the approach to provincial spatial planning in South Africa. It demonstrates the CSIR’s involvement in conducting the national Provincial Growth and Development Strategy ...Read more
Author:Wright, CDate:Oct 2012Schools have a unique advantage to help curb the negative human health effects of excess personal sun exposure by providing a sun safe environment and promoting sun protection behaviour among children and adolescents.Read more
Author:Chunilall, Viren; Wesley-Smith, J; Bush, TDate:Dec 2009Wood fibres are the raw material used in the production of dissolving pulp for the manufacture of cellulose derivatives such as viscose and cellulose acetate. At the microscopic level, the wood cell wall is organised in layers with different ...Read more
Author:Garland, Rebecca MDate:Feb 2012This article discusses the effects of acid mine drainage on human health. Skin irritation, kidney damage, neurological diseases are some of the human health effects.Read more
Author:Garland, Rebecca MDate:2011Acid Mine Drainage (AMD) has recently attracted lots of attention in South Africa, both in parliament and in the media. AMD is formed in the mine itself through a variety of chemical reaction pathways, before it enters the environment as ...Read more
Author:Vadapalli, VRK; Zvimba, JN; Mathye, M; Fischer, H; Bologo, LDate:Oct 2015This study investigated the implications of using two grades of limestone from a paper and pulp industry for neutralization of acid mine drainage (AMD) in a pilot sequencing batch reactor (SBR). In this regard, two grades of calcium carbonate ...Read more
Author:De Beer, Morris; Maree, JP; Wilsenach, J; Motaung, S; Bologo, L; Radebe, VDate:Sep 2010The gold mines on which much of South Africa’s wealth was founded are closed or closing. Mining concerns therefore have stopped pumping underground water from the mines which are filling with water (AMD) that is acidic, saline and vitiated ...Read more
Author:Martirosian, O; Davel, MDate:Nov 2008Diphthongs typically form an integral part of the phone sets used in English ASR systems. Because diphthongs can be represented using smaller units (that are already part of the vowel system) this representation may be inefficient. We evaluate ...Read more
Author:Van Niekerk, DR; Barnard, EDate:Nov 2008The quality of corpus-based text-to-speech (TTS) systems depends strongly on the consistency of boundary placements during phonetic alignments. Expert human transcribers use visually represented acoustic cues in order to consistently place ...Read more
Author:Kleynhans, N; Molapo, R; De Wet, FebeDate:Nov 2012The paper presents work aimed at optimising acoustic models for the AutoSecretary call routing system. To develop the optimised acoustic models: (1) an appropriate phone set was selected and used to create a pronunciation dictionary, (2) ...Read more
Author:Kleynhans, N; Molapo, R; De Wet, FebeDate:Nov 2012The paper presents work aimed at optimising acoustic models for the AutoSecretary call routing system. To develop the optimised acoustic models: (1) an appropriate phone set was selected and used to create a pronunciation dictionary, (2) ...Read more
Author:Modipa, T; Davel, M; De Wet, FebeDate:Oct 2010Automatic speech recognition (ASR) systems are increasingly being developed for under-resourced languages, especially for use in multilingual spoken dialogue systems. We investigate different approaches to the acoustic modelling of Sepedi ...Read more
Author:Brink, S; Dorfling, C; Aldrich, CDate:May 2016Relatively small rocks that detach from stope hanging walls during periods when miners are working in the vicinity pose a lethal risk, and contribute significantly to underground fatalities in the South African mining industry, totalling 89 ...Read more
Author:von Bergmann, HM; Forbes, A; Roberts, T; Botha, LRDate:Aug 2008Results are presented on the influence of acoustic waves on the performance of high-repetition-rate TEA CO2 lasers. It is shown that acoustic waves generated inside the laser cavity lead to nonuniform discharges, resulting in a deterioration ...Read more
Author:Van Reenen, Coralie A; Du Plessis, ChrisnaDate:Aug 2021This research set out to broaden the pool of evidence regarding the acoustic conditions at schools in South Africa. A review of local and international literature, standards and design guidelines shows that the ideal classroom acoustic ...Read more