Author:Ampofo-Anti, NDate:Dec 2015This paper highlights the need for a non-chemical approach to the cultivation of fibre crops intended for building applications in South Africa. A case study considered four fibre crops – flax, industrial hemp, kenaf and sisal – that are ...Read more
Author:Van der Watt, R; Erasmus, Louwrence DDate:Jul 2016A public multi-disciplinary primary-level hospital delivers clinical services to both in and out patients within its catchment area. A multi-disciplinary hospital is a healthcare facility of which the commissioning or transition into operations ...Read more
Author:Arhete, LE; Erasmus, Louwrence DDate:May 2016Despite the end of apartheid decades ago, the South African healthcare system continues to face significant challenges. Although efforts were made in the past to address the crisis, the system is said to be performing below standard. The South ...Read more
Author:Edwards, ADate:Sep 2010This paper deals with noise-induced hearing loss protection in the South African mining industry. I deals with several issues, including standards and regulations, medical issues and compensationRead more
Author:Schutte, PDate:Sep 2009Occupational heat stress is a recognized health and safety hazard in South African mines. The consequences of high occupational heat loads can be expressed in terms of impaired work capacity, errors of judgment with obvious implications for ...Read more
Author:Schutte, PC; Kielblock, AJ; Marx, HEDate:Nov 1994The present report presents the findings of SIMRAC project GAP 045 entitled ‘Heat stress protection in abnormally hot environments’. It is intended as a reference to develop guidelines which, in turn would assist mine management in establishing ...Read more
Author:Steenkamp, Anton J; Kienhofer, F; De Saxe, CCDate:Sep 2021Previous research investigating the dynamic road wear produced by heavy vehicles has not included the effect of road crossfall. This study shows that road crossfall, even at values as low as 1%, has a significant effect on the predicted dynamic ...Read more
Author:Du Plessis, L; Strauss, PJ; Perrie, BD; Rossmann, DDate:Jul 2006The paper addresses two different heavy Vehicle Simulator (HVS) studies conducted on concrete: Load transfer through aggregate interlock and the use of dowels and the evaluation of the performance of an in-service continuously reinforced ...Read more
Author:Viljoen, AW; Freeme, CR; Servas, VP; Rust, FCDate:Jul 1987Conventional overlay life estimates are often invalidated by the reflection of existing cracks in a pavement through an overlay. This is attributable to a lack of understanding of the factors influencing relative crack movements and their ...Read more
Author:Theyse, HL; Steyn, WJVDM; Sadzik, E; Henderson, MDate:Jun 2006Developing countries such as South Africa have an urgent need to create road infrastructure for rural access and urban mobility. Many of these roads will operate under low traffic volumes and only require a sealed, light pavement structure. ...Read more
Author:Du Plessis, L; Coetzee, NF; Burmas, N; Harvey, JT; Monismith, CLDate:Oct 2008The purpose of this paper is twofold. Firstly, it will provide a brief description of the technological developments involved in the Heavy Vehicle Simulator (HVS) accelerated pavement testing equipment. This covers the period from its conception ...Read more
Author:Rust, FC; Du Plessis, L; Verhaeghe, Benoit MJA; Grobler, JEDate:Oct 1993Internationally, interest in accelerated pavement testing (APT) is increasing, in particular testing with mobile machines which allow the performance of in-service roads to be assessed. The Californian Department of Transportation (CALTRANS) ...Read more
Author:Du Plessis, L; Kohler, EDate:Jul 2007This paper focuses on results obtained from recent accelerated loading testing in California with a Heavy Vehicle Simulator (HVS) on a particular system of pre-cast slabs, referred to as SuperSlab. For heavily trafficked highways, such as ...Read more
Author:Cilliers, A; Nel, Willem AJDate:Sep 2008A technique based on time-frequency and tomographic analysis to extract helicopter blade parameters for the purposes of radar non-cooperative target recognition (NCTR) is investigated. The proposed algorithm shows that (under certain conditions) ...Read more
Author:Wright, C; Diab, RD; Binedell, MLDate:Oct 2008Air quality management plans identify prioritised strategies and actions independent of any consideration of population exposure and vulnerability. This is seen as a major shortcoming, particularly in a country such as South Africa where ...Read more
Author:Dudeni-Tlhone, N; Ramoelo, Abel; Debba, Pravesh; Cho, Moses A; Mathieu, Renaud SADate:Nov 2012Feeding patterns and distribution of herbivores animals are known to be influenced by quality and quantity of forage such as grass. Modelling indicators of grass quality and biomass are critical in understanding such patterns and for decision ...Read more
Author:Peach, S; Vorster, J; Van Heerden, Renier PDate:May 2010In this paper the authors explore heuristic attacks against graphical password generators. A new trend is emerging to use user clickable pictures to generate passwords. This technique of authentication can be successfully used for - for example ...Read more
Author:Grobler, J; Engelbrecht, AP; Kendall, G; Yadavalli, VSSDate:Jul 2014This paper introduces the concept of heuristic space diversity and investigates various strategies for the management of heuristic space diversity within the context of a meta-hyper-heuristic algorithm. Evaluation on a diverse set of ...Read more