Author:Nickless, A; Scholes, B; Brunke, EDate:Oct 2012Calculating the greenhouse gas emissions from an area is usually done by adding up all the known sources. Some can be missed, and others under-reported. But there is now a way to conduct an independent check. By measuring the concentration ...Read more
Author:Krygsman, S; de Jong, T; Schmitz, PDate:Jul 2007Daily activities and travel often follow a natural rhythm or flow that is structured by the fixed spatial and temporal constraints. The work and home location act as pegs that define individual’s activity space and it is within these spaces ...Read more
Author:Pienaar, H; Van Deventer, Martha JDate:Aug 2007Giraffes do not play leap frog, these animals however symbolise the giants whose shoulders one can stand. Leapfrogging requires action, get moving, and get playing. A digital repository is a database or catalogue where digital content and ...Read more
Author:Butgereit, L; Nickless, ADate:Aug 2013Carbon Dioxide levels in South Africa's Cape area have shown a steady increase from 355.6 ppm in 1983 to approximately 383 ppm in 2008 with current values being approximately 387. These values, however, are not necessarily communicated to the ...Read more
Author:Roro, Kittessa T; Mwakikunga, Bonex W; Forbes, A; Tile, N; Yalisi, BDate:Sep 2010Multi-walled carbon nanotube (MWCNT)/Nickel oxide nanocomposites were prepared on aluminum substrates for selective solar absorber applications. MWCNTs are functionalized in order to disperse in water and ethanol. Results from the characterization ...Read more
Author:Modibedi, Remegia M; Mathe, Mahlanyane K; Ozoemena, KIDate:Sep 2011Ethanol powered direct alcohol fuel cells (DAFCs) have attracted enormous attention as potential power sources for portable electronic devices and transportation due to the much higher energy density than gaseous fuels such as hydrogen and ...Read more
Author:Mathe, Mahlanyane K; Modibedi, Remegia MDate:Aug 2011Carbon supported Pd-Ni and Pd-Ru-Ni nanocatalysts were prepared by the chemical reduction method, using sodium borohydride and ethylene glycol mixture as the reducing agent. The catalytic activity towards ethanol electro-oxidation in alkaline ...Read more
Author:Katumba, G; Baisitse, T; Forbes, A; Olumekor, L; Wackelgard, EDate:Jul 2006The Bruggeman and Maxwell-Garnett effective medium approximations (EMAs) have been used to investigate optical properties of composite materials. The EMA assumptions are based on random unit cell models in which metal particles are embedded ...Read more
Author:Katumba, G; Forbes, ADate:Aug 2009The Bruggeman and Maxwell-Garnett effective medium approximations have been used widely to investigate optical properties of many different composite materials. In most cases, the effective medium approximation assumptions are based on random ...Read more
Author:Tile, N; Roro, Kittessa T; Forbes, ADate:Jul 2011Nanocomposite materials have wide range of applications in solar energy conversion. In this work, C-NiO nanocomposite coatings are prepared using sol-gel synthesis and deposited on aluminium substrates using a spin coater. The coatings are ...Read more
Author:Kruger, Daniel MDate:Aug 2005This paper discusses various mechanisms that could assist in the promotion of CPTED as an essential and useful crime prevention approach and support its effective implementation at the macro as well as micro level. Mechanisms that could be ...Read more
Author:Szewczuk, S; Ayanna, MBDate:Aug 2016The Time-of-Use tariff is designed to discourage the use of electricity by commercial customers during peak demand periods with the morning peak tariff operating from 7:00am to 10:00am during weekdays. The evening peak demand period with the ...Read more
Author:Khalala, G; Makitla, I; Botha, Adèle; Alberts, RDate:May 2013For centuries, rural communities have relied on their indigenous knowledge for survival and sustenance. Indigenous Knowledge (IK) is understood as local knowledge, which is unique and traditional to a specific community. Due to the fact that ...Read more
Author:Marais, ELDate:2006The importance of traceability for every measurement that is made cannot be over-emphasised. For calibration and testing laboratories, traceability is normally imported through calibration of the standards and equipment used in the laboratory. ...Read more
Author:Van Reenen, Coralie ADate:Nov 2015This multiple case study was designed to investigate acoustics in multi-bed general wards in four urban South African hospitals. Evidence-based research shows that a quiet indoor environment has positive outcomes for hospital patients and ...Read more
Author:Mphahlele, C; Van Wyk, Llewellyn VDate:Aug 2017Purpose of this paper: The purpose of the paper is to provide an overview of the current state of tenders submitted by Occupational Health and Safety (OHS) professionals in terms of functionality criteria. Design/methodology/approach: The ...Read more
Author:Smith, CJ; Venter, JPDate:Nov 2011In the scope of Tactical Data Links (TDL), the South African National Defence Force (SANDF) started the journey to establish a national TDL capability with the commencement of their national Strategic Defence Procurement Packages (SDPP) in ...Read more
Author:Thomson, P; Almutery, BDate:Apr 2011This paper describes the process that was followed in the development of a real-time, embedded Tracking and Control Application (TCA) to be incorporated into a pulse-Doppler radar signal processing test and evaluation facility. The complete ...Read more
Author:Coetzer, W; Moodley, D; Gerber, ADate:May 2013The domain complexity and structural- and semantic heterogeneity of biodiversity data, as well as idiosyncratic legacy data-creation processes, present significant integration and interoperability challenges. In this paper we describe a ...Read more