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Browsing Research Publications/Outputs by Publication Type "Article"

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130000-year-old fossil elephant found near Durban, South-Africa: preliminary-report

Author: Ramsay, PJ ; Smith, AM ; Lee-Thorp, JC ; Vogel, JC ; Tyldsley, M ; Kidwell, W Date: Apr 1993 A modern African elephant tusk was discovered within a late Pleistocene aeolianite at Reunion Rocks, south of Durban. Ionium dating indicates that the tusk is older than 112 kyr BP with stratigraphic control suggesting a date at ca. 130 kyr ... Read more
1910–2010: How infrastructure grew our nation

Author: Wall, K Date: Oct 2010 One hundred years ago this year, South Africa was established by an Act of Union. That Act gave us the shape and the texture that defined us as a nation. And it is wonderful that, despite all the exclusions and discriminations since May 1910, ... Read more
20-year LiDAR observations of stratospheric sudden warming over a mid-latitude site, Observatoire de Haute Provence (44°N, 6°E): Case study and statistical characteristics

Author: Charyulu, DV ; Sivakumar, V ; Bencherif, H ; Kirgis, G ; Hauchecorne, A ; Rao, DN Date: Nov 2007 The present study delineates the characteristics of Stratospheric Sudden Warming (SSW) events observed over the Observatoire de Haute Provence (OHP: 44°N, 6°E). The study uses 20 years of Rayleigh LiDAR temperature measurements for the 1982-2001 ... Read more
2014 Election forecast - a post-election analysis

Author: Ittmann, HW ; Holloway, Jennifer P ; Dudeni-Tlhone, Nontembeko Date: Jun 2017 General elections are held every five years in South Africa. During the 12 to 24 hour period after the close of the voting booths, the expected final results are of huge interest to the electorate and politicians. In the past, the Council for ... Read more
The 2020 WMO symposium on climatological, meteorological and environmental factors in the COVID-19 pandemic: A special issue from symposium presentations

Author: Sweijd, Neville ; Zaitchik, BF Date: Jun 2021 The COVID-19 pandemic has become one of the great historical events of the modern era, presenting a generational challenge to the world. Questions about the role of weather on SARS-CoV-2 transmission led to the gathering of scientists at an ... Read more
2D numerical model for heat transfer on a laser deposited high entropy alloy baseplate using Comsol Multiphysics

Author: Dada, A ; Popoola, P ; Mathe, Ntombizodwa R ; Adeosun, S ; Aramide, O Date: Dec 2021 In an optimization study, cracks were observed in the microstructures of laser-deposited HEAs on a steel baseplate from residual stresses, thus, the optimization of crack-free microstructures was achieved by the optimization of the laser ... Read more
3-D breast anthropometry of plus-sized women in South Africa

Author: Pandarum, R ; Winnie, Y ; Hunter, Lawrance Date: Sep 2011 Exploratory retail studies in South Africa indicate that plus-sized women experience problems and dissatisfaction with poorly fitting bras. The lack of 3-D anthropometric studies for the plus-size women's bra market initiated this research. ... Read more
3-substituted anilines as scaffolds for the construction of glutamine synthetase and DXP-reductoisomerase inhibitors

Author: Mutorwa, M ; Salisu, S ; Blatch, GL ; Kenyon, C ; Kaye, PT Date: Jan 2009 Access to a series of truncated ATP analogs, as potential anti-tuberculosis agents, has been explored via alkylation and acylation of 3-aminophenol, whereas chloroacetylation, using chloroacetyl chloride, and subsequent Arbuzov phosphonation ... Read more
330 mJ single-frequency Ho:YLF slab amplifier

Author: Strauss, Hencharl J ; Preussler, D ; Esser, MJD ; Koen, W ; Jacobs, Cobus ; Collett, OJP ; Bollig, C Date: Apr 2013 We report on a double-pass Ho:YLF slab amplifier which delivered 350 ns long single-frequency pulses of up to 330 mJ at 2064 nm, with a maximum M(sup2) of 1.5 at 50 Hz. It was end pumped with a diode-pumped Tm:YLF slab laser and seeded with ... Read more
3D edge detection seismic attributes used to map potential conduits for water and methane in deep gold mines in the Witwatersrand basin, South Africa

Author: Manzi, MSD ; Durrheim, RJ ; Hein, KAA ; King, N Date: Sep 2012 Inrushes of ground water and the ignition of flammable gases pose risks to workers in deep South African gold mines. Large volumes of water may be stored in solution cavities in dolomitic rocks that overlie the Black Reef (BLR) Formation, ... Read more
3D evaluation of fine-scale normalised DSMs in urban settings

Author: Breytenbach, Andre Date: Sep 2020 Humankind often needs to accurately model, identify and spatially quantify aboveground phenomena on the Earth’s surface for informed decision-making. Height data derived from digital elevation models (DEMs) is often used to achieve this. This ... 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
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
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

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