http://hdl.handle.net/10204/3918 3rd CSIR Biennial Conference 31 August & 01 September 2010 CSIR International Convention Centre Pretoria 2013-05-22T15:56:19Z http://hdl.handle.net/10204/4768 Title: Lighter, greener and strong: developing light metals for application in the aerospace industry Authors: Du Preez, W Abstract: This presentation starts of by discussing the drivers of the international titanium industry, followed by drivers of the South African titanium industry. The Titanium Centre of Competence is then analysed. The conclusion is reached that the Titanium Centre of Competence has successfully aligned titanium related R&D across the country and focused these strongly on needs of the aerospace industry. The Investment Casting process for Titanium castings has also been successfully developed and packaged and the commercialisation effort has started. Adding to this, the patented CSIR Rheocasting technology for semi-solid metal casting of high strength aluminium alloys is also ready for commercialisation and offers interesting opportunities for aerospace application Description: CSIR 3rd Biennial Conference: Science Real and Relevant, CSIR International Convention Centre, Pretoria, 30 August-1 September 2010 2010-08-01T00:00:00Z http://hdl.handle.net/10204/4756 Title: Method for calculating the variance and prediction intervals for biomass estimates obtained from allometric equations Authors: Kirton, A; Scholes, B; Archibald, S Abstract: Often researchers are interested in obtaining estimates of variables which are quite difficult or expensive to measure. To obtain these estimates, relationships between those variables of interest and more easily measured variables are used. These relationships are referred to as allometric equations. In science it is important to quantify the error associated with an estimate in order to determine the reliability of the estimate. Therefore, prediction intervals or standard errors are usually quoted with estimated values. In the case of allometric equations, information about the original fitting of the allometric relationship is needed in order to put a prediction interval around an estimated value. However, often all the information required to calculate this prediction interval is not provided with published allometric equations, forcing the users of these equations to use alternative, less rigorous methods of obtaining error estimates. This paper will explain the method behind obtaining prediction intervals for allometric estimates, and what information is required from the original fitting of the allometric relationships. This information seeks to provide researchers with the necessary parameters which should be published with allometric relationships. In addition, a method is explained for how to deal with relationships which are in the power function form – a common form for allometric relations. Description: CSIR 3rd Biennial Conference: Science Real and Relevant, CSIR International Convention Centre, Pretoria, 30 August-1 September 2010 2010-08-01T00:00:00Z http://hdl.handle.net/10204/4666 Title: Rural community sustainable development portal - towards sustainable knowledge management and development Authors: Chakwizira, J; Nhemachena, C Abstract: Between the years 2008 and 2010 CSIR Built Environment embarked on a joint project with the Walter Sisulu University (WSU) to develop a rural community sustainable development portal. The portal provides a point for interaction, dialogue and exchange of experiences, practices and success stories in rural areas of developing countries. The vision of the rural development portal is to provide leadership in rural development matters through focusing on developing countries. The portal aims to be a prime rural and development knowledge and solutions resource site for Africa and the developing world. This should ultimately facilitate the development of projects and programmes that transform rural spaces, cultures and people from poverty to prosperity through championing and fostering inclusive rural development agendas. Description: CSIR 3rd Biennial Conference 2010. Science Real and Relevant, CSIR International Convention Centre, Pertoria, South Africa, 30 August – 01 September 2010, 2010-09-01T00:00:00Z http://hdl.handle.net/10204/4564 Title: Aquaculture and the utilisation of plant wastes in fish feeds Authors: Jacobs, A Abstract: The growing aquaculture industry uses fish diets containing fishmeal as the main protein source. As part of the global drive to replace fishmeal with a more reliable, sustainable and cost-effective protein source, CSIR Biosciences investigated the use of plant-derived proteins in fish feeds. Cereal waste products such as brewers' spent grain and sunflower press cake were evaluated, as well as soya oilcake, a biodiesel by-product. During feeding trials with these plant-based waste products, marine and freshwater fish performed well in terms of consumption, growth, feed conversion ratio and mortality rate. It was therefore concluded that soya oilcake or high protein brewers' spent grain has the potential to partially replace fishmeal in fish diets. Description: CSIR 3rd Biennial Conference 2010. Science Real and Relevant. CSIR International Convention Centre, Pretoria, South Africa, 30 August – 01 September 2010 2010-08-31T00:00:00Z