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3D, parallel fluid-structure interaction code

Author: Oxtoby, Oliver F ; Malan, AG Date: Jan 2011 The authors describe the development of a 3D parallel Fluid–Structure–Interaction (FSI) solver and its application to benchmark problems. Fluid and solid domains are discretised using and edge-based finite-volume scheme for efficient parallel ... Read more
5G: the convergence of wireless communications

Author: Chavez-Santiago, R ; Szydelko, M ; Kliks, A ; Foukalas, F ; Haddad, Y ; Nolan, KE ; Kelly, MY ; Masonta, Moshe T ; Balasingham, I Date: Mar 2015 As the rollout of 4G mobile communication networks takes place, representatives of industry and academia have started to look into the technological developments toward the next generation (5G). Several research projects involving key ... Read more
A 6-bit, 500-MS/s current-steering DAC in SiGe BiCMOS technology and considerations for SFDR performance

Author: Reddy, Reeshen ; Sinha, S Date: Apr 2015 This paper presents a six-bit current-steering digital-to-analogue converter (DAC), which optimises the spurious free dynamic range (SFDR) performance of high-speed binary weighted architectures by lowering current switch distortion and ... Read more
6th Annual state of logistics survey for South Africa 2009

Author: Ittman, H ; Schoeman, C ; King, D ; Bean, W ; Viljoen, N Date: Mar 2010 The 2009 theme for the state of logistics’ survey is ‘Logistics Value and Costs – Driving Macro and Micro-economic Change towards Global Competitiveness and Sustainability’. For South Africa to become and stay competitive internationally the ... Read more
85 dBA: is it protective enough to prevent hearing loss in South African miners?

Author: Edwards, A Date: Sep 2009 The Occupational Exposure Limit (OEL) for noise is legislated to be 85 dBA. However, owing to the energy of different frequencies the effect on the ear by sounds of different frequencies is known to vary. Also, there is recent evidence of the ... Read more
8th Annual State of Logistics™ Survey for South Africa 2011

Author: Viljoen, N Date: May 2012 The global economic landscape is shifting with increased focus on emerging markets that have been more resilient than their counterparts in developed countries. Countries that never featured as consumer markets in the past are suddenly appearing ... Read more
99mTc-MDP as an imaging tool to evaluate the in vivo biodistribution of solid lipid nanoparticles

Author: Mandiwana, Vusani ; Kalombo, Lonji ; Grobler, A ; Zeevaart, JR Date: Nov 2018 The aim of this study was to establish the in vivo uptake and tissue distribution of (sup)99mTc-MDP-encapsulated Solid Lipid Nanoparticles (SLNs) post administration. Radioactive (sup)99mTc-MDP encapsulated into SLNs was administered to rats ... Read more
9th state of logistics survey for South Africa: connecting neighbours - engaging the world

Author: Viljoen, N ; Bean, W ; Havenga, J ; Simpson, Z ; Jankauskaite, Z ; Gounder, S ; Steyn, W ; de Jonge, G ; Sambandan, M ; Laubscher, C ; Ittmann, H ; Luke, R ; Heyns, G Date: Jun 2013 The 9th State of Logistics survey for South Africa 2012 delivers a message of action. South Africa must make great strides in addressing critical issues relating to the road freight sector, shifting freight from road to rail and addressing ... Read more
a-MnO2 nanorod/onion-like carbon composite cathode material for aqueous zinc-ion battery

Author: Palaniyandy, Nithyadharseni ; Kebede, Mesfin A ; Raju, Kumar ; Ozoemena, KI ; Le Roux, Lukas ; Mathe, Mahlanyane K ; Jayaprakasam, R Date: May 2019 Onion-like carbon (OLC) integrated a-MnO2 nanorods (a-MnO2/OLC) composite has been studied as a viable cathode material for potential development of high-performance zinc-ion batteries (ZIBs). XRD results revealed the tetragonal phase of the ... Read more
AAC services for multilingual populations: South African service provider perspectives

Author: Tönsing, KM ; Van Niekerk, K ; Schlunz, Georg I ; Wilken, Ilana Date: Jun 2018 BACKGROUND: In South Africa, many persons in need of augmentative and alternative communication (AAC) come from multilingual backgrounds. There is as yet a limited evidence base (locally and internationally) for the provision of AAC services ... Read more
Ab initio calculation of the voltage profile for LiC6

Author: Kganyago, KR ; Ngoepe, PE ; Catlow, CRA Date: Mar 2003 Energetics of the anode system LiC6 compared to metallic lithium is calculated within the framework of local-density functional theory (LDA-DFT) techniques. Our results suggest that the energy of anode intercalation results in a small change ... Read more
Ab initio studies of vacancies in (8,0) and (8,8) single-walled carbon and boron nitride nanotubes

Author: Mashapa, MG ; Chetty, N ; Ray, Suprakas S Date: Sep 2012 A systematic study of vacancies in single-walled carbon nanotubes and boron nitride nanotubes was carried out. First principles calculations within the framework of density functional theory using the CASTEP code are used to optimize fully ... Read more
Above ground perennial plant biomass across an altitudinal and land-use gradient in Namaqualand, South Africa

Author: Anderson, PML ; Hoffman, MT ; O'Farrell, Patrick J Date: Aug 2010 This study set out to generate estimates of the standing perennial biomass for six different vegetation types, and associated upland and lowland habitats, across the altitudinal gradient presented by the Kamiesberg mountain range in the ... Read more
An above-ground biomass map of African savannahs and woodlands at 25m resolution derived from ALOS PALSAR

Author: Bouvet, A ; Mermoz, S ; Le Toan, T ; Villard, L ; Mathieu, Renaud SA ; Naidoo, Laven ; Asner, GP Date: Mar 2018 Savannahs and woodlands are among the most important biomes in Africa: they cover half of sub-Saharan Africa, provide vital ecosystem services to the rural communities, and play a major part in the carbon budget. Despite their importance and ... Read more
Aboveground biomass subdivisions in woody species of the savanna ecosystem project study area, Nylsvley

Author: Rutherford, MC Date: Jan 1979 Aboveground peak season biomass is given for 11 woody species in each of five belt transects under study. Mean aerial biomass for all species was 16 273 kg ha, made up of 14 937 kg ha wood, 236 kg ha current season's twigs and 1 100 kg ha ... Read more
ABox abduction in ALC using a DL tableau

Author: Halland, K ; Britz, K Date: Oct 2012 The formal definition of abduction asks what needs to be added to a knowledge base to enable an observation to be entailed by the knowledge base. ABox abduction in description logics (DLs) asks what ABox statements need to be added to a DL ... Read more
Absolute activity measurement of the electron-capture-based radionuclides Ce-139, I-125, Ir-192 and Zn-65 by liquid scintillation coincidence counting

Author: Van Wyngaardt, WM ; Simpson, BRS Date: Oct 2006 Four radionuclides with electron-capture-based decay schemes have been directly measured by a liquid scintillation coincidence extrapolation technique. The advantage of using (LS) counting in the 4p channel is that self-absorption does not ... Read more
Absorptive capacity and ICT adoption strategies for SMEs: a Case study in Kenya

Author: Ndiege, JRA ; Herselman, Martha E ; Flowerday, SV Date: Oct 2014 Many small and medium enterprises (SMEs) in developing countries continue to be challenged by their information technology (IT) adoption process, which is often characterized by a number of deficiencies. The purpose of this study was to examine ... Read more
Absorptive capacity as a guiding concept for effective public sector management and conservation of freshwater ecosystems

Author: Murray, K ; Roux, DJ ; Nel, JL ; Driver, A ; Freimund, W Date: Mar 2011 The ability of an organisation to recognise the value of new external information, acquire it, assimilate it, transform, and exploit it, namely its absorptive capacity (AC), has been much researched in the context of commercial organisations ... Read more
Absorptive capacity: relevancy for large and small enterprises

Author: Ndiege, JR ; Herselman, Martha E ; Flowerday, SV Date: Jun 2012 The purpose of this article is thus to provide a review of the literature on this subject with the aim of finding out how both large and small enterprises stand to benefit from AC. We intend to affirm that, by successfully carrying out a ... Read more

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