Author:Scholes, RJ; Scholes, MCDate:Sep 1998Nitric oxide (NO) reacts with hydrocarbons and carbon monoxide (CO) in the presence of sunlight to form ozone in the lower atmosphere. Tropospheric ozone can be harmful to plants and animals, and is usually regarded as a symptom of industrial ...Read more
Author:Ayele, M; Tesfaye, T; Alemu, D; Limeneh, M; Sithole, Bishop BDate:Sep 2020Recently, there has been a great deal of interest to circumvent the environmental problems associated with manufactured colouring agents by using natural dyes. This study focuses on extracting natural dyes from mango leave and mango peel and ...Read more
Author:Taljaard, Susan; Slinger, JH; Arabi, Sumaiya; Weerts, Steven P; Vreugdenhil, HDate:Oct 2020Rapid urbanization of the coast, growing global trade, stakeholder emancipation and ongoing depletion of natural resources mean that ports can no longer operate and develop without acknowledging and incorporating societal and environmental ...Read more
Author:Guduri, BBRDate:Dec 2006The influence of Hildegardia populofolia fabric content, fabric orientation, sodium hydroxide (NaOH) and silane coupling agent treatment on the surface properties of the fabric, mechanical and fracture properties of Hildegardia populifolia- ...Read more
Author:Balakrishnan, P; John, Maya J; Pothen, L; Sreekala, MS; Thomas, SDate:2016Fiber-reinforced polymer composite materials are fast gaining ground as preferred materials for construction of aircrafts and space crafts. In particular, their use as primary structural materials in recent years in several technology- ...Read more
Author:Gilgen, D; Williams, BG; MacPhail, C; Van Dam, CJ; Campbell, C; Ballard, RC; Taljaard, DDate:Sep 2001This paper presents the results of a cross-sectional biomedical and social survey, conducted in a major gold mining centre with a high prevalence of HIV infection. It also provides the baseline data for a comprehensive intervention programme. ...Read more
Author:Sefara, Tshephisho J; Rangata, Mapitsi RDate:Oct 2023Exaggerated news titles are used to deceive news readers and spread misleading information. This paper presents a new natural language processing (NLP) technique that identifies exaggerated news titles. The technique uses Jaccard similarity ...Read more
Author:Maharaj, VDate:Oct 2012In this presentation the author outlines the steps taken in developing a South African indigenous plant-based microbicide to prevent HIV infection in women.Read more
Author:John, Maya J; Thomas, SDate:Aug 2012The scarcity of natural polymers during the world war years led to the development of synthetic polymers like nylon, acrylic, neoprene, styrene-butadiene rubber (SBR) and polyethylene. The increasing popularity of synthetic polymers is partly ...Read more
Author:De Wit, MP; Swilling, M; Musango, JKDate:11 Aug 2008Cities in developing countries often have to face a multiplicity of external shocks that impact on their operations. These changes include increased rates of migration from the rural poor, natural resource shocks such as droughts, decreased ...Read more
Author:Weinert, HHDate:1980Naturally occurring materials, such as rock and soil, constitute a significant portion of the materials content and cost of a road. Most textbooks dealing with road construction materials, however, are mainly concerned with the manufactured ...Read more
Author:Clauss, KADate:20 Feb 2009The book brings together the results of research spread over a number of reports and papers during the past 27 years and to create a guide for soil stabilization work. Its aim is to provide sufficient knowledge of soil/lime reactions to make ...Read more
Author:Muronga, Khangwelo; Ruxwana, NkqubelaDate:Jul 2017Naturalistic Driving Studies (NDS) is a research methodology that has the potential to improve existing approaches for collecting data about driver behaviour and performance in normal driving conditions. Analysis of naturalistic driving data ...Read more
Author:Rakitianskaia, AS; Olivier, MS; Cooper, Antony KDate:Aug 2011Online social spaces have become very popular in the past couple of decades. With the great numbers of users in the online environments it becomes obvious that the human factor plays an important role in the social structure of such environments. ...Read more
Author:De Vries, M; Gerber, A; Van der Merwe, ADate:May 2014Enterprise engineering originated as a practice with most publications focusing on the practical facets without the underlying scientific foundation. Foundational works emerged from different authors in recent years, including Dietz, Hoogervorst ...Read more
Author:Baumbach, JDate:Oct 2009During 1983 DSTO in Australia measured the reflectances of grass, trees and soil in northern Australia, using a custom-build spectroradiometer. During 2002 CSIR in South Africa performed similar measurements in northern South Africa, using a ...Read more