Author:Strauss, Hencharl J; Preussler, D; Esser, MJD; Koen, W; Jacobs, Cobus; Collett, OJP; Bollig, CDate:Apr 2013We 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
Author:Manzi, MSD; Durrheim, RJ; Hein, KAA; King, NDate:Sep 2012Inrushes 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
Author:Breytenbach, AndreDate:Sep 2020Humankind 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
Author:Purdon, Kyla; Van Niekerk, T; Phillips, R; Marais, Stephen TDate:Nov 2023Unmanned Aerial Vehicles (UAVs) have shown great potential for data collection and monitoring of areas. Sensors such as LiDARs and cameras can be used on UAVs for high-resolution data collection and used for various applications like Digital ...Read more
Author:Lee, SA; Webb, SJ; Jones, MQW; Durrheim, RJ; Ganerød, MDate:Oct 2013The Mesoproterozoic Pilanesberg Complex, South Africa, is the world’s largest alkaline intrusion. While surface field relationships suggest an inward dipping structure, it is unclear how these dips extend to depth. The 3D geometry of the ...Read more
Author:Curle, Ulyate ADate:Jul 2017The issue regarding globular grain shape and size has been a topic for semi-solid processing since the discovery of the technique. Semi-solid rheo-processing takes advantage of cooling a liquid metal alloy to the solid + liquid phase field, ...Read more
Author:De Beer, MorrisDate:Oct 2010The CSIR’s proprietary Stress-in-Motion (SIM) measurements provide rational descriptions of 1D, 2D and 3D tyre/road pavement stresses for: Road pavement design testing and evaluation, as well as tyre design, testing and evaluation.Read more
Author:Duvenhage, B; Delport, JP; Louis, ADate:Oct 2007A 3D visual analysis tool has been developed to add value to the SANDF's growing Ground Based Air Defence (GBAD) System of Systems simulation capability. A time based XML interface between the simulation and analysis tool, via a TCP connection ...Read more
Author:Oxtoby, Oliver F; Malan, AGDate:Jan 2011The 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
Author:Ramruthan, Kshir; Kuchwa-Dube, CDate:Nov 2023Disturbances experienced by an inspection robot can reduce the quality of its sensor measurements, which can in turn negatively affect the robot’s functionality. This research aimed to design a Parallel Kinematic Mechanism (PKM) for use as ...Read more
Author:Mamushiane, Lusani; Mwangama, J; Lysko, Albert A; Kobo, Hlabishi IDate:Aug 2022The global impact of COVID-19 has been unprecedented, with over-the-top (OTT) services consumption growing at a staggering rate. While OTT does consume revenue-generating data, OTT services are gradually substituting the traditional primary ...Read more
Author:Reddy, Reeshen; Sinha, SDate:Apr 2015This 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
Author:Ittman, H; Schoeman, C; King, D; Bean, W; Viljoen, NDate:Mar 2010The 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
Author:Steyn, Maronel; Walters, Chavon RDate:Nov 2021Water scarcity, increased pollution, unprecedented population growth and climate change are collectively driving the need to reuse water with the aim to enhance water security, sustainability, and resilience. It is clear that South Africa¿s ...Read more
Author:Edwards, ADate:Sep 2009The 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
Author:Viljoen, NDate:May 2012The 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
Author:Mandiwana, Vusani; Kalombo, Lonji; Grobler, A; Zeevaart, JRDate:Nov 2018The 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