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Item 120 years of excellence in service to Mining.(The Southern African Institute of Mining and Metallurgy., 2017-04) Musingwini, C.The Wits School of Mining Engineering, which is celebrating 120 years of service to the mining industry, is the seed from which the University of the Witwatersrand grew, and is now the largest mining school in the English-speaking world.Item Acid mine drainage and its governance in the Gauteng City-Region(2015-05) Bobbins, KerryAcid mine drainage (AMD) in the Gauteng City-Region (GCR) has been described in the media as a ticking time bomb after it was officially reported to have begun surfacing from old mining works on the West Rand in 2002 (Masondo et al., 2011; TAU SA, 2011; Slack, 2013). Acid mine drainage occurs when ‘fool’s gold’ (FeS2) or iron pyrite found in mined rock oxidises. This occurs when either underground mine shafts, or crushed conglomerate in Mine Residue Areas (MRAs) on the surface, become exposed to oxygen and water creating run-off that is very high in sulphates – effectively sulphuric acid – and is hazardous to both humans and the environment (McCarthy 2010). Over the last decade, a flurry of news articles have highlighted the threat of acid water decant and its likely effects on human health, the environment, water quality, municipal infrastructure and building foundations in the Johannesburg Central Business District (CBD). These reports have fuelled anxieties around when and where decant will take place and who will be affected by AMD. In response to these concerns, government, through the National Department of Water Affairs (DWA), has introduced a set of immediate and short-term interventions to overcome decant in the West Rand. These have allowed AMD to be framed as an environmental emergency. DWA has also set in motion a process to develop a long-term solution that, through a broader and more inclusive approach, will solve various AMD issues over time including its impact on the Gauteng water supply. In relation to both these two government interventions – the immediate/short and long-term solutions – very few stakeholders or members of the public know enough about AMD and its governance to understand what the real challenges are and how they should respond. Even fewer are able to piece together the series of events that led up to the current and proposed set of actions taken by DWA to tackle AMD. This paper argues that the current trajectory of government-led responses has suspended meaningful public engagement and debate, and the result is a grey cloud of misinterpreted facts and presumed motives that has cast a shadow of misunderstanding, which in turn exacerbates the anxieties of affected communities and interested stakeholder groupsItem Advancing international collaboration through the Global Mineral Professionals Alliance (GMPA).(The Southern African Institute of Mining and Metallurgy., 2017-03) Musingwini, C.Extract from Editorial: The GMPA is currently composed of six sister institutes: the Australasian Institute of Mining and Metallurgy (AusIMM), the Canadian Institute of Mining, Metallurgy and Petroleum (CIM), the Institute of Materials, Mining and Metallurgy (IOM3), the SAIMM, the Society for Mining, Metallurgy and Exploration Inc. (SME), and the Instituto de Ingenieros de Minas del Peru (IIMP).Item African Architect; a Journal devoted to the interests of the Architectural Profession in South Africa(Institutes of South African Architects and the Chapter of South African Quantity Surveyors, 1914)African Architect; a Journal devoted to the interests of the Architectural Profession in South AfricaItem African Architect; the Journal of the Association of Transvaal Architects(Institutes of South African Architects and the Chapter of South African Quantity Surveyors, 1911)African Architect; the Journal of the Association of Transvaal ArchitectsItem African Architect; the Journal of the Association of Transvaal Architects(Institutes of South African Architects and the Chapter of South African Quantity Surveyors, 1912)African Architect; the Journal of the Association of Transvaal ArchitectsItem African Architect; the Journal of the Association of Transvaal Architects(Institutes of South African Architects and the Chapter of South African Quantity Surveyors, 1913)African Architect; the Journal of the Association of Transvaal ArchitectsItem An evaluation of the applicability of the extended situational leadership model to lower level management in the South African construction industry(University of the Witwatersrand, 1990-08-10) Cocotos, GeorgeThe vast majority of theories and models that have been developed around the concept of leadership have been conceptualized, and tested in the USA and other countries outside South Africa as discussed in the literature survey, Chapter 2 of this dissertation). Furthermore, the models developed have largely been theoretical models aimed to help leaders only to identify the most appropriate leadership style to use. None have however attempted to develop a model that leaders can use to implement the most appropriate leadership style once it has been chosen. Consequently, A D Jaff, using the most integrated and recently developed Situational Leadership Theory and Mode 1 of Hersey and Blanchard as a data base, developed the first leadership implementation model - The Extended Situational Leadership Model. Since AD Jaff's implementation model is a combination of various other leadership mode ls and theories, in order to fully understand the development of the Extended SL Model, all the relevant models are researched in this dissertation (see Chapter 2). This dissertation attempts to test the applicability of the Extended SL Model in a practical construction environment in South Africa. It further attempts to make adaptations to the model where relevant, after testing its performance value through the administration of 3 questionnaires to a sample of potential/practising black leaders (on-site construction managers). (This lS surveyed in Chapters 3 to 6 of this dissertation). The objective of this dissertation is therefore to attempt to test, and where necessary, to adapt AD Jaff's Extended SL Model so that : 1) this theoretical model may be implemented practically in a South African construction working environment (i.e. to prove that the mode 1 does work in practice) ( see Chapter 4). and to test whether 2) the adapted mode 1 is applicable for the training of future black Low-Level leaders in the South African construction environment. The adapted form of the model will, I believe, prove to be a useful tool for the training of black leaders within the South African construction organisations, where the volatile industry and changing economic and political environment of South Africa with ensure the emergence of black South African Low Level leaders in the construction industry in the near future.Item Assessment of two cone penetration test based methods for evaluating the liquefaction potential of tailings dams.(2013-06-12) Torres Cruz, Luis AlbertoThe stability of tailings dams is of great importance to the mining industry. It is well known that soil liquefaction is one of the mechanisms that can compromise the stability of such structures. Given the difficulty of extracting undisturbed samples of any cohesionless material, the use of in situ tests to assess liquefaction potential has been intensely researched. The purpose of this work was to assess the applicability to tailings dams of two CPT-based liquefaction assessment methodologies, namely, the Robertsonbased and the Olson and Stark methodologies. Ten case histories were evaluated. When considering triggering of liquefaction, the Robertson-based and Olson and Stark methodologies correctly predicted the behaviour of four out of five and seven out of ten case histories, respectively. When considering the onset of flow failure, the Olson and Stark methodology correctly predicted the behaviour in four of seven case histories for which a post-triggering analysis was made. The results are useful in understanding the shortcomings of implementing these methodologies on TSFs and the limits of their predictive power.Item Back to the Streets; Exploratory research on pedestrian life and walking spaces in the Greater Johannesburg area(South African Research Chair in Development Planning and Modelling, School of Architecture and Planning, University of the Witwatersrand., 2012) Cabaret, AliceThe aim of this exploratory research is to identify the different aspects and trends of the pedestrian practices in the Greater Johannesburg area. This has been achieved by the use of “street models” encapsulating the different socio-demographic profiles of pedestrians as well as their uses of space, based on site visits and social surveys....... This research aims at being exploratory and at providing a first understanding of pedestrian life and walking spaces in Johannesburg. It also looks at the challenges to their development, based on the comparative analysis of street models. The research provided provisional answers to questions posed, but also raised additional complex questions to be interrogated. The research method itself assumes that the findings cannot be perfectly representative: rather they serve as a base for preliminary conclusions and further research.Item Benchmarking the way cities and regions around the world are responding to the global recession(2009-09) Everatt, David; Gotz, Graeme; Phakathi, Sizwe; Makgetla, NevaThe Gauteng Provincial Government Department of Economic Department (GPGDED) approached the Gauteng City-Region Observatory (GCRO) to provide them with a fast turn-around report that benchmarks sub-national responses to the economic crisis globally. The brief was to provide a review of what cities and regions are doing in response to the crisis in other parts of the world, and to emphasise the action side of the story – what is being done, rather than analysing the differing nature and impact of the crisis in different places.The report is filled not so much with specific recommendations as a suite of possible interventions that the Gauteng Provincial Government may wish to choose from and implement.Item Brazil: innovation and development(2012-10) Arbix, Glauco; de Toledo, Demétrio G. C.; Felizardo, Rafael G.This essay discusses recent developments in Brazil´s innovation policies. These policies are part of a long-term developmental process and the current search for a new national configuration of policies and instruments capable of steering Brazil in the midst of globalisation and economic systems that have knowledge as their backbone. Industrialisation became the main source of inspiration as a means of attaining social evolution in countries like Brazil, South Africa, India, Mexico, Argentina and South Korea, to name a few; and in a sense this remains true today. These roots have marked state institutions and underscore the modus operandi of government planners. Brazil´s prospects for overcoming poverty, inequality and the burden of late development can be described as a process of attaining a better balance between earlier achievements and the current process of institution-building aimed at providing Brazil with the policies and instruments to support innovation as a means of achieving social and economic development.Item The brighter side of career cyclically in the mining professions in South Africa.(The Southern African Institute of Mining and Metallurgy., 2017-02) Musingwini, C.Extract from Editorial: Mining professionals are generally in the fields of mining engineering, mineral processing, metallurgy, geology, and surveying. In order to enter a profession in the mining industry and follow an engineering career, a good mathematics and science education is required when exiting the high school system.Item CHANGING LAND USE ON THE PERIPHERY; a case study of urban agriculture and food gardening in Orange Farm.(South African Research Chair in Development Planning and Modelling, School of Architecture and Planning, University of the Witwatersrand., 2012-08) RICHARDS, ROBIN; TAYLOR, SUEThis study was undertaken after funding was received under a call for short-term consultancies to investigate a range of topics related to urban spatial transformation. The call was issued by the School of Architecture and Planning of the University of Witwatersrand under the NRF SARCHi initiative. This study investigates peri-urban food gardens and the role that food gardening plays in Orange Farm in addressing poverty and in improving food security. The study specifically looks at the effects of available open space on urban agriculture and food gardening in Orange Farm. It was hypothesised at the outset of the study that, being located on the peri-urban periphery of the city, Orange Farm is not yet densely populated or short of land for food gardening to be excluded as a livelihood option. This abundance of open land could, therefore, become an asset in an agriculturally-based strategy to target poverty in this priority region of the city.1.......... This study was undertaken after funding was received under a call for short-term consultancies to investigate a range of topics related to urban spatial transformation. The call was issued by the School of Architecture and Planning of the University of Witwatersrand under the NRF SARCHi initiative. This study investigates peri-urban food gardens and the role that food gardening plays in Orange Farm in addressing poverty and in improving food security. The study specifically looks at the effects of available open space on urban agriculture and food gardening in Orange Farm. It was hypothesised at the outset of the study that, being located on the peri-urban periphery of the city, Orange Farm is not yet densely populated or short of land for food gardening to be excluded as a livelihood option. This abundance of open land could, therefore, become an asset in an agriculturally-based strategy to target poverty in this priority region of the city.1...... The study was guided by two key research questions, namely: 1. What interest do Orange Farm residents have in urban agriculture and food gardening; and can this interest be used as a spatial planning element as the settlement undergoes increased formal development? 2. Are there spatial, land ownership, socio-economic and attitudinal constraints that currently affect the implementation of food gardening projects and urban agriculture in Orange Farm and, if so, which of these is the greatest obstacle to current and future urban agriculture and food gardening?Item A composite index of quality of life for the Gauteng city-region: a principal component analysis approach(2015-03-30) Greyling, TalitaGCRO's 'Quality of Life' survey and outputs are increasingly part of the research landscape, with both policy and academic uptake. However, to ensure that the results are as accurate as possible, we commission external reviews using alternative analytic methods, to see if they generate similar or very different findings, in addition to the in-house quality control measures in place. In this way, all spheres of government - and GCRO ourselves - can be reassured that rigorous peer review and critique is an integral part of our work. In this paper, UJ economist Talita Dalton-Greyling uses PCA (Principal Component Analysis) to re-run the 2011 Quality of life data and see if her outcomes are similar to ours - which they were. The paper also provides an interesting overview of the global move away from GDP and other economistic measurements of growth to more quality of life and/or well-being measures, and locates her and our work in a broader global context.Item Country Life in South Africa with which is incorporated "The African Architect"(Institutes of South African Architects and the Chapter of South African Quantity Surveyors, 1915)Country Life in South Africa with which is incorporated "The African Architect"Item The decanting of acid mine water in the Gauteng City-Region: analysis, prognosis and solutions(2010-09) McCarthy, TerenceThe large void beneath the Witwatersrand created by gold mining over the last 120 years is filling with water, which is rising at about 15m per month. The void will fill and water will begin to leak out (decant) on surface in about three years from now. It is likely that multiple decant points will develop in municipal areas across the Witwatersrand from Roodepoort to Boksburg. experience on the West Rand has shown that the quality of the water is likely to be poor and toxic. The prime risk area where decant points are likely to develop is in a zone about 500m wide straddling Main Reef Road and the M2 motorway, plus a secondary zone some two kilometres to the south. deep basements of buildings and other sub-surface infrastructure in the risk zones could experience flooding and the underground facility at Gold Reef City, a national treasure, will be lost. The problem can be solved by establishing pump stations at shallow depth in the mining belt to keep the water at a safe depth below surface. a depth of 300m is recommended in order to protect the Gold Reef City facility. The technological capability to do this is readily available, and the necessary water treatment processes are well established. although initially expensive, the pumping operation may ultimately generate a profit. Moreover, the cost of not pumping may ultimately vastly exceed the cost of timely intervention. establishing the necessary pumping and water treatment infrastructure will take considerable time, and therefore immediate action is required.Item Distribution of population vs economic activity(Gauteng City-Region Obervatory, 2021-08-31) Mosiane, Ngaka; Murray, JenniferThe location of population in relation to economic activity in the Gauteng City-Region (GCR) has been a subject of considerable interest from a number of researchers and institutions. This Map of the Month contributes to that body of work, highlighting a misalignment between where people live and where Gross Value Add (GVA) typically associated with urban development occurs. The map shows every ‘mesozone’ – equally sized polygons drawn by the Centre for Scientific and Industrial Research (CSIR) – across the extended Gauteng City Region, using a radius of 175km from the centre of Johannesburg. The value of each mesozone is calculated by subtracting its share of the whole region’s population from its share of selected urban economic sectors. In green mesozones, the share of urban economic activity exceeds the share of population, while in red or orange mesozones, the share of population exceeds the share of the urban economy. The map draws attention to the edges of Gauteng’s metropolitan areas as sites with larger population shares than that of the economy (e.g. the red and orange shaded ‘mesozones’ in Soweto, Soshanguve, and KwaMhlanga). The opposite is true for the core of the GCR, which is characterised by high urban economic agglomeration compared to the people living there (e.g. the green shaded mesozones around Johannesburg and Pretoria).Item Does density drive development?(South African Research Chair in Development Planning and and Planning, University of the Witwatersrand., 2012-08) Msulwa, Rehemahere is growing interest among governments and researchers around the world in the contribution of cities to economic development. Several influential international organisations have argued that the spatial concentration of economic activity is necessary for faster economic growth. This paper examines whether the density of population and economic activity influences the rate of local economic growth in South Africa. Municipalities are the basic units of analysis and the time frame is 1996-2010. Contrary to expectations, no statistically significant relationship is found between density and growth across the full range of 237 local municipalities. However, searching hard for a relationship among particular kinds of municipality, some evidence does emerge. The influence of human skills on local growth is also examined and is found to be more robust than density. Several reasons are given for why the relationship between density and growth is generally weak or non-existent.Item Economic and commuting connections in the northern GCR(Gauteng City-Region Obervatory, 2022-02-28) Mosiane, Ngaka; Murray, JenniferThis Map of the Month illustrates some of the ways through which the core areas of the Gauteng City-Region (GCR) are interconnected with their peripheries, including those that are outside the Gauteng Province, but are within commuting distance. The connections are drawn as straight lines from the start to end points, representing some of the regional flows of goods, services, and people (particularly workers). These flows signify disparate types of relationships between the city region peripheries and core areas, involving the transporting of mining supplies from Gauteng to Rustenburg mining operations. They also indicate relationships of interdependence, including daily commutes from northern Tshwane and former KwaNdebele to the City of Tshwane. It suggests that railway lines, highways, and roads are among the government's most important development interventions. Ordinary people themselves turn those facilities into resources to cope with, rework, or even overcome their marginality. The resultant large-scale practices and spaces of mobility overcome the divide between the core and periphery.