Author:Strauss, Hencharl J; Koen, W; Bollig, C; Esser, MJD; Jacobs, Cobus; Collett, OJP; Preussler, DRDate:Jul 2011A single-frequency single-pass amplifier based on Ho:YLF and Ho:LuLF in a scalable slab architecture delivering up to 210 mJ at 2064 nm is demonstrated. The amplifier was end-pumped by a 1890 nm Tm:YLF slab laser and was seeded with a 69 mJ ...Read more
Author:Botha, LR; Bollig, C; Esser, MJD; Campbell, RN; Jacobs, Cobus; Preussler, DRDate:Oct 2009A Ho:YLF laser pumped HBr molecular laser was developed that produced up to 2.5mJ of energy in the 4 micron wavelength region. The Ho:YLF laser was fiber pumped using a commercial Tm:fibre laser. The Ho:YLF laser was operated in a single ...Read more
Author:Estuarine and Coastal Research Unit, ECRUDate:Jun 1981The Holgat is not an estuary in the true sense, due to a combination of factors. Although the catchment has an area of 1500 km2, the Holgat last flowed in 1925. The main reason for this appears to be the low rainfall in the catchment and the ...Read more
Author:Van Zyl, Louwrens HDate:Sep 2006Flutter clearance is usually regarded as a two step process: flutter analysis (including ground vibration testing, aerodynamic analysis and equation of motion solution), and flutter flight testing. The problem with this approach is that there ...Read more
Author:Young, TN; Busgeeth, KDate:Jul 2009Home-based care (HBC), to promote quality-of-life and limit hospital care, is used in many countries, especially where public health services are overburdened. This systematic review assessed the effects of HBC on morbidity and mortality in ...Read more
Author:Matsebe, GDate:Sep 2009The housing plan known as “Breaking New Ground” (BNG) promotes the use of the house as an asset for wealth creation and empowerment (Dept of Housing, 2004). An assessment of social housing developments in South Africa indicated that some of ...Read more
Author:Naudé, BDate:Sep 2011Arguments for a Network Centric Approach are considered in view of threat characteristics and a multitude of role-players within an international arena. The challenges to attain effective Command and Control are discussed in the context of ...Read more
Author:Thiede, R; Fabris-Rotelli, I; Debba, Pravesh; Cleghorn, CWDate:Mar 2024Spatial linear networks exhibit a variety of patterns. Like spatial point patterns, they can be homogeneous or heterogeneous. Although there exist a wide variety of tests for the homogeneity of point patterns, no statistical tests currently ...Read more
Author:Maharaj, VJ; Senabe, JV; Horak, RMDate:Nov 2008An appetite suppressant agent from Hoodia developed by CSIR scientists, promises to become the first natural food ingredient for weight management based on a plant indigenous to the African continent. The research programme that led to this ...Read more
Author:Visagie, N; Smal, CADate:Oct 2013The influence of hopper geometry on the flow behaviour of typical metallic powders used in additive manufacturing processes is investigated. Bulk hopper theory provides a method of determining critical hopper parameters for bulk amounts of ...Read more
Author:Booth, R; Meyer, T; Varzinczak, I; Wassermann, RDate:Aug 2010The authors show that Booth et al.’s Horn contraction based on infra-remainder sets corresponds exactly to kernel contraction for belief sets. This result is obtained via a detour through Horn contraction for belief bases, which supports the ...Read more
Author:Parsons, SA; Hussey, R; Abbott, GR; De Jager, PetaDate:Oct 2008This paper provides an overview of hospital design solutions to accommodate M(X)DR-TB patients and methodologies adopted to fast track the provision of much needed beds in the various high burden provinces in South AfricaRead more
Author:Scriba, Manfred R; Britton, DT; Härting, MDate:Nov 2012Monocrystalline silicon nanoparticles with a mean diameter of between 30 and 40 nm have been synthesised by hot wire thermal catalytic and spark pyrolysis at a pressure of 40 and 80 mbar respectively. For the production a mixture of the ...Read more
Author:Anochie-Boateng, Joseph; Denneman, E; O'Connell, Johannes S; Mturi, George AJ; Ventura, DDate:Aug 2010As part of the revision of the South African Pavement Design Method (SAPDM), a large scale field and laboratory study into the material response of asphalt mixtures will be undertaken. A first step in this process is to review the state-of-the ...Read more
Author:Cummings, FR; Arendse, CJ; Malgas, GR; Scriba, Manfred R; Knoesen, D; Theron, CCDate:Jul 2006Owing entirely to their structure, carbon nanotubes (CNTs) possess some of the most remarkable chemical and physical properties. More specifically, they exhibit exceptional strength and toughness, chemical inertness, magnetism, and electrical ...Read more
Author:Scriba, Manfred R; Arendse, CJ; Harting, M; Britton, DTDate:Jan 2008The viability of producing silicon nanoparticles using the HWCVD process is investigated. A system is assembled and particles are produced from silane at pressures between 0.2 – 48 mbar, with hydrogen dilutions of 0-80%, at a total flow rate ...Read more
Author:Furnival-Adams, J; Olanga, EA; Napier, Mark; Garner, PDate:Jan 2021Despite being preventable, malaria remains an important public health problem. The World Health Organization (WHO) reports that overall progress in malaria control has plateaud for the first time since the turn of the century. Researchers and ...Read more
Author:Motsatsi, Lorato L; Gibberd, Jeremy TDate:May 2019Human settlements and housing are a part of people’s material living conditions and contribute directly to their life choices. Human settlements that are poorly located, constructed and serviced force households to spend a larger proportion ...Read more