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Browsing by Author "Koen, Renée"

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Ad hoc statistical consulting within a large research organization

Author: Elphinstone, CD ; Koen, Renée ; Das, Sonali Date: Aug 2009 The paper discusses the ad hoc statistical consulting service initiated within the CSIR that has proved successful; however, resourcing remains a major challenge. Even limited advertising of the service within the CSIR resulted in many requests ... Read more
The changing face of waste management – considerations when conducting a waste characterisation study

Author: Oelofse, Suzanna HH ; Muswema, Aubrey P ; Koen, Renée Date: Oct 2016 Changing the face of waste management in South Africa, includes waste diversion from landfill to alternative management options. There are a number of interventions to consider which may vary from very low tech, labour intensive solutions to ... Read more
Clustering of housing and household patterns using 2011 population census

Author: Dudeni-Tlhone, N ; Holloway, Jennifer P ; Khuluse, S ; Koen, Renée Date: Nov 2013 This study looked at a specific application of cluster analysis using the recently released population census 2011 data for the Ekurhuleni Metro in the Gauteng Province of South Africa. The main focus of the clustering was to distinguish ... Read more
Comparison of various modelling approaches applied to cholera case data

Author: Van Den Bergh, F ; Holloway, Jennifer P ; Pienaar, M ; Koen, Renée ; Elphinstone, CD ; Woodborne, S Date: Jun 2008 The application of a methodology that proposes the use of spectral methods to inform the development of statistical forecasting models for cholera case data is explored in this paper. The seasonal behaviour of the target variable (cholera ... Read more
Could the outcome of the 2016 US elections have been predicted from past voting patterns?

Author: Schmitz, P ; Holloway, Jennifer P ; Dudeni-Tlhone, Nontembeko ; Ntlangu, Mbulelo B ; Koen, Renée Date: Jul 2017 In South Africa, a team of analysts has for some years been using statistical techniques to predict election outcomes during election nights in South Africa. The prediction method involves using statistical clusters based on past voting ... Read more
Density forecasting for long-term electricity demand in South Africa using quantile regression

Author: Mokilane, Paul M ; Galpin, J ; Sarma Yadavalli, VS ; Debba, Pravesh ; Koen, Renée ; Sibiya, Siphamandla Date: Mar 2018 This study involves forecasting electricity demand for long-term planning purposes. Long-term forecasts for hourly electricity demands from 2006 to 2023 are done with in-sample forecasts from 2006 to 2012 and out of sample forecasts from 2013 ... Read more
Developing long-term scenario forecasts to support electricity generation investment decisions

Author: Koen, Renée ; Magadla, T ; Mokilane, P Date: Sep 2014 Many decisions regarding capital investment in electricity generation technologies need to be made well in advance, usually when there is still a large amount of uncertainty regarding the favourability of future conditions. There may be ... Read more
First state of logistics survey for South Africa 2004: The case for measurement and revitalisation of basic logistics infrastructure in our dual economy

Author: Van Dyk, FE ; Marais, Mario A ; Naude, AH ; Meyer, IA ; Koen, Renée ; Ralehoko, EN ; Ramokgopa, L ; Ittmann, HW ; Pienaar, WJ ; Havenga, JH ; Hobbs, IE ; Botes, FJ ; Jacobs, CG Date: Feb 2005 This survey highlights that South Africa's core structural problems are far worse than expected: Logistics cost represents a considerable percentage of the GDP (14.7% or R180bn). We spend more on transport than generally expected and much ... Read more
Measurement of shape property distributions of quartzite aggregate from different crushers using 3D laser scanning system

Author: Mgangira, Martin B ; Anochie-Boateng, Joseph ; Koen, Renée ; Komba, Julius J ; Tutumluer, E Date: Jan 2016 Aggregate shape properties are used to characterize aggregate product from quarry operations. However, aggregate shape depends on rock type and crushing process. A meta-quartzite, a relatively low grade thermal metamorphic rock was crushed ... Read more
Positioning technology development in the South African construction industry: a technology foresight study

Author: Rust, FC ; Koen, Renée Date: Apr 2011 Internationally infrastructure is ageing rapidly and there is increased utilisation of infrastructure due to urbanisation and globalisation. Significant amounts are invested globally to address this issue, although funding fluctuates from ... Read more

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Browsing by Author "Koen, Renée"

Browsing by Author "Koen, Renée"

Browse

All of ResearchSpace

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Legislation and compliance

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