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Multimethod approach to modelling of complex sociotechnical systems

Author: Oosthuizen, Rudolph ; Pretorius, P Date: Oct 2018 Systems Engineering has to solve increasingly complex problems through the implementation of solution systems. Solving contemporary complex problems requires Systems Thinking to address the emergent and evolutionary behavior. System Dynamics, ... Read more
Network preservation through a topology control algorithm for wireless mesh networks

Author: Aron, FO ; Olwal, TO ; Kurien, A ; Hamam, Y Date: Sep 2008 Wireless mesh networks (WMNs) is becoming a promising new technology for extending coverage to farflung rural areas. This it achieves by linking the various wireless LANS (WLANs) in distant locations thus providing a vital mode complimentary ... Read more
Neural network modelling and prediction of the flotation deinking behaviour of industrial paper recycling processes

Author: Pauck, WJ ; Venditti, R ; Pocock, J ; Andrew, J Date: 2014 The removal of ink from recovered papers by flotation deinking is considered to be the “heart” of the paper recycling process. Attempts to model the deinking flotation process from first principles has resulted in complex and not readily ... Read more
A novel technology for neutralizing acidity and attenuating toxic chemical species from acid mine drainage using cryptocrystalline magnesite tailings

Author: Masindi, Vhahangwele Date: Apr 2016 The present study was developed with the aim of beneficiating two waste materials by converting them into a resource. Magnesite tailings, which is the by-product of magnesite mining, was used to remediate acid mine drainage (AMD) which is the ... Read more
Optimum heat storage design for heat integrated multipurpose batch plants

Author: Stamp, J ; Majozi, T Date: 2011 Heat integration to minimise energy usage in multipurpose batch plants has been in published literature for more than two decades. In most present methods, time is fixed a priori through a known schedule, which leads to suboptimal results. ... Read more
Phase effects in tap-hole flow – a computational modelling study

Author: Reynolds, QG ; Olsen, JE ; Erwee, MW ; Oxtoby, Oliver F Date: Jun 2019 The extraction of molten products and wastes through smelting furnace tap-holes during the tapping process is a complex procedure involving many coupled thermophysical effects. Insight into the fluid flow behaviour in such systems can be ... Read more
Provisional results from accelerated testing of ultra thin-layer reinforced concrete in South Africa

Author: Du Plessis, L ; Strauss, PJ ; Kilian, A Date: Aug 2009 The CSIR Built-Environment, in conjunction with the University of Pretoria and the Cement and Concrete Institute of South Africa, developed a low cost option for the upgrading of unsurfaced (gravel) roads. The proposed solution is the placing ... Read more
Quantifying and modelling the effects of environmental factors on wood properties of Eucalyptus grandis in South Africa

Author: Naidoo, Sasha Date: Mar 2011 This research aimed to quantify and model the effects of specific environmental variables on the wood quality of Eucalyptus grandis in the warm temperate (WT) and sub-tropical (ST) forestry regions in South Africa using nondestructive, rapid ... Read more
Quantifying the spatial implications of future land use policies in South Africa: Reshaping a city through land use modelling

Author: Le Roux, Alize Date: Aug 2012 Land use policies have a definite and lasting impact on the way that cities grow, however, the change in land use only gets observed many years later. As such, it is difficult for policy and decision makers to observe and quantify the ... Read more
Self-healing polymeric composite material design, failure analysis and future outlook: A review

Author: Mphahlele, Keletso ; Ray, Suprakas S ; Kolesnikov, A Date: Oct 2017 The formation of micro-cracks and crack propagation is still an acute problem in polymer and polymer composites. These micro-cracks usually occur while the materials are manufactured or serviced. The development and coalescence of these cracks ... Read more
Sensitivity analysis of a simple linear model of a savanna ecosystem at Nyslvley

Author: Getz, WA ; Starfield, AM Date: Dec 1975 The construction of a linear compartmental model of the savanna ecosystem at Nylsvley is discussed. Using crude estimates for the standing crop of the compartments and intercompartmental flow rates the sensitivity of the model to changes in ... Read more
The sensitivity of a water distribution system to regional state parameter variations

Author: Page, Philip R Date: May 2018 The sensitivity of a pressurised water distribution system (WDS) to state parameter variations is studied. A novel local regional sensitivity analysis (LRSA) approach is introduced which applies the same change to a collection of parameters, ... Read more
Solving management problems in water distribution networks: A survey of approaches and mathematical models

Author: Bello, O ; Abu-Mahfouz, Adnan MI ; Haman, Y ; Page, Philip R ; Adedeji, KB ; Piller, O Date: Mar 2019 Modern water distribution networks (WDNs) are complex and difficult to manage due to increased level of urbanization, varying consumer demands, ageing infrastructure, operational costs, and inadequate water resources. The management problems ... Read more
Understanding onsets of rainfall in Southern Africa using temporal probabilistic modelling

Author: Cheruiyot, D ; Osunmakinde, IO Date: Dec 2010 This research investigates an alternative approach to automatically evolve the hidden temporal distribution of onset of rainfall directly from multivariate time series (MTS) data in the absence of domain experts. Temporal probabilistic modelling ... Read more
Usability and Information access challenges in complex simulation models

Author: Naidoo, Shahen ; Dube, C Date: Jul 2008 There has been a paradigm shift in recent years from efficient techniques of accessing data to effective information access. The challenge facing researchers working in information access is how to help users easily locate the information ... Read more
Use of simulation in flare countermeasure development

Author: Delport, JP ; Willers, N ; Le Roux, FPJ Date: Nov 2008 The use of simulation in flare countermeasure development Read more
Verification of the CADRCS RCS tool for NCTR work

Author: Botha, L Date: Mar 2007 This paper looks at the suitability of using the CADRCS RCS prediction tool for research into a class of NCTR work where the radar will give a high resolution output of the target, either a High Range Resolution (HRR) plot or Inverse Synthetic ... Read more
Wind Atlas for South Africa (WASA): Project overview and status - Wind Power Africa Conference 2010

Author: Szewczuk, S ; Lennard, C Date: May 2010 The goal of the South African Wind Energy Programme (SAWEP) is to reduce greenhouse gas emissions generated by thermal power in the national inter-connected system. SAWEP has six main expected outcomes: increased public sector incremental ... Read more

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