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1
Lydiatt, Tracy, Patricia Mequita e Anne Nolan. "Sustainable Mining? Applying the Framework for Strategic Sustainable Development to Mining Projects". Thesis, Blekinge Tekniska Högskola, Avdelningen för maskinteknik, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3922.
Testo completoAbstract (sommario):
Precious and base metal mining projects can serve as a stepping-stone in moving the mining industry towards achieving compliance with a scientific-principled definition of global socio-ecological sustainability. Using the Framework for Strategic Sustainable Development to assess the current reality of mine project development has resulted in identifying gaps between current best practices and a desired vision of sustainability constrained by science based principles. These gaps provide opportunities for sustainability driven innovation. Evaluation of mining project phases and their impacts on ecological and social systems using the four Sustainability Principles highlight specific opportunities to create value for social, economic and ecologic systems. Companies choosing to develop mining projects using the Framework for Strategic Sustainable Development can expect to achieve many business benefits, including improved reputation, increased transparency and stakeholder trust. Strengthening these aspects will provide robust support to companies as they manoeuvre to define their role in a sustainable society. This thesis examines how current processes for mining projects can be developed to support a successful transition into a sustainable society.
2
Sun, Wenyi. "Data mining extension for economics". Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/5869.
Testo completoAbstract (sommario):
Thesis (M.S.)--University of Missouri-Columbia, 2006.The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on September ) Vita. Includes bibliographical references.
3
Gyogluu, Sarah. "Planning and development of mining towns in Ghana: an exploration of mining and urban development frameworks and practices". Thesis, Cape Peninsula University of Technology, 2013. http://hdl.handle.net/20.500.11838/1446.
Testo completoAbstract (sommario):
Thesis submitted in fulfillment of the requirements for the degree
Master of Technology: Town and Regional Planning
in the Faculty of Informatics and Design
at the Cape Peninsula University Of Technology
2013Ghana has had a long history of mining especially with respect to gold, dating back to the Trans-Saharan Trade where gold precipitated civilisations and was a main commodity of trade among Europeans, merchants and ancient kingdoms. In the 21st century, globalisation coupled with increasing urbanisation has been driving demand for mineral resources and thus the resurging commodity booms. This increases foreign direct investment (FDI) in mining countries like Ghana resulting in not only growth in gross domestic product (GDP) but impacts that transcend macro-level and have direct and indirect impacts on communities in mining regions. The result is often that livelihoods are altered, spin-offs on the local economy emerge and the attendant settlement functions impact on the efficacy of existing mining and development planning and regulatory frameworks. Tarkwa is one of Ghana’s traditional gold mining towns and is the substantive context of the research. The main objectives of the research were: To identify the existing key mining and development planning regulations, gaps present and how these have impacted on the efficacy of governments management practices in responding to consequences of mining-led development. To analyse the urban household’s perceptions of mining impacts on livelihoods, business enterprises and livelihood coping strategies and mechanisms. To assess the implications of these emerging planning and development frameworks and trends for the effective planning and development of mining towns in Ghana The highlights of the findings of the research in relation to the above objectives included: The research revealed that urban households’ perception of mining on their livelihoods was mixed. One of the perceived negative impacts of mining that stuck out from overall responses was scarcity of land for purposes of farming and building. With respect to coping with mining impacts, respondents largely employed a combination of assets to survive the mining environment. However, respondents’ dependence on human capital-that is, their ability to work and generate income underpinned all livelihoods capitals. Over 96 percent of business enterprises, perceived purchasing power of people and related available or potential market as the most positive spin-off from mining yet. The informal economy was dominant in terms of business enterprise ownership with informal trading as the most principal form of business enterprise in the informal economy. The research findings have significant meaning within the broad context of mining-led urban development and with implications for theory, the development and planning for resource-driven settlements (practice) and for further research. For example, with regard to development and planning practice, some glaring challenges include the lack of a proper land management system, “superiority” of some institutions (mine houses)in dealing with the Town and Planning Department and Municipal Assembly, lack of effective collaboration between related institutions, gaps in planning legislations make planning near impossible in Tarkwa. The effect being that Tarkwa is growing (spatially to accommodate businesses and people coming in) but without an effective and responsive development planning system to effectively channel and coordinate this growth so that long term development is sustained. The study concludes and recommends that, there is need for a rethink in the way mining towns are planned for and developed in Ghana and should include: a review of the Minerals and Mining law (Act 703) to engender more rights and protection to the communities, a constant review of concession and other agreements to reflect a constantly changing world order, institutional collaboration for planning and development, and long term planning which synchronises spatial and economic planning to capture advantages of agglomeration in and around the Tarkwa mining region.
4
Xongo, Nosipho. "The impact of mining on infrastructure development and poverty reduction in mining communities". Thesis, Nelson Mandela Metropolitan University, 2013. http://hdl.handle.net/10948/d1018576.
Testo completoAbstract (sommario):
There is a growing concern from government, communities, civil society and mining companies on the sustained development of the impact of mining on communities and the benefits of mineral development. Communities are more vocal in expressing their expectations for benefits and on the other hand mines are concerned about profits and maintaining a social licence to operate. This study critically evaluates the impact mining has on socio-economic development in mining communities. The focus area of the study is the West Rand District Municipality in Gauteng Province, South Africa. The ‘impact’ refers to the mine’s contribution to infrastructure development and poverty reduction projects in areas where the mine is operating and sourcing labour from. Forecasts for better performance in the future will be assessed. Issues such as community consultation, identification of projects, development forums, the Integrated Development Plan (IDP) and partnerships are addressed. The literature was reviewed from existing national and international research on the topic. The study starts from two assumptions. The first is that minerals are potentially a great resource of wealth for poor countries. The second assumption is that minerals have the potential to benefit the local population through the creation of indirect employment, skills transfer, enhancing the capacity of health and education services, improved infrastructure and small and medium business opportunities. Poverty levels are viewed on a national and international scale. The study reveals problems, with existing approaches, on mine community development. It concludes that the impact of mining on infrastructure development and poverty reduction projects can be huge, but only if a variety of demanding preconditions are met. The study concludes that the reality of mineral led development in mine communities has not lived up to a roaring promise.
5
Argust, Peter William. "Sustainable development and the global mining industry". Thesis, University of Surrey, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326529.
Testo completo
6
Schwartz, Priscilla. "Sustainable development and mining in Sierra Leone". Thesis, Queen Mary, University of London, 2005. http://qmro.qmul.ac.uk/xmlui/handle/123456789/1871.
Testo completoAbstract (sommario):
The conflicts between pursuing mining activities to foster economic development and protecting the environment in which such activities take place is a recurring dilemma for mineral reliant countries like Sierra Leone. The concept of sustainable development was designed on the international platform to ameliorate such dilemmas. The concept functions as an arbiter to reconcile biases between developmental goals and environmental objectives, by advocating an integration of one in the other. This study presents sustainable development as valuable recipe, by which mining ventures could be pursued as an economic imperative (to meet the needs of present and future generations), while protecting the environment and its components in the pursuit of such developments. The thesis begins with an introduction into mining in Sierra Leone. It illustrates the international breeding of sustainable development in environmental protection (as oppose to economic development), and emphasise the importance of sustainability principles for sound legal and policy guidance at the national level. It also establishes the applicability of the concept to mineral resourced evelopmentsg enerally. Mineral-specificla ws and other legal controls in Sierra Leone are then examined as a case study; their sustainability content is ascertained and their capacity as a legal regime to direct or achieve sustainable mining in that country is explored. Finally, aspects of implementation of sustainable development in Sierra Leone's mining and its domestic implications are examined. This study shows that despite the definitional questions, sustainable development has direct and primary relevance for environmental protection in the economic exploitation of natural resources. It identifies a legal character in the concept beyond legislative processes, and a flexibility in its principles that allows for their interpretation within legal rules to enhance environmental protection at the national level. It also illustrates the link between effective implementation and ensuring sustainable mining.
7
JUNIOR, JOAO RIBEIRO CARRILHO. "DEVELOPMENT OF A METHODOLOGY FOR TEXT MINING". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2007. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=11675@1.
Testo completoAbstract (sommario):
CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOA seguinte dissertação tem como objetivo explorar a Mineração de Textos através de um estudo amplo e completo do que atualmente é considerado estado da arte. Esta nova área, considerada por muitos como uma evolução natural da Mineração de Dados, é bastante interdisciplinar e vem obtendo importantes colaborações de estudiosos e pesquisadores de diversas naturezas, como Lingüística, Computação, Estatística e Inteligência Artificial. Entretanto, muito se discute sobre como deve ser um processo completo de investigação textual, de forma a tirar máximo proveito das técnicas adotadas nas mais variadas abordagens. Desta forma, através de um encadeamento sistemático de procedimentos, pode-se chegar a uma conclusão do que seria a metodologia ideal para a Mineração de Textos, conforme já se chegou para a de Dados. O presente trabalho explora um modelo de processo, do início ao fim, que sugere as seguintes etapas: coleta de dados, pré-processamento textual, indexação, mineração e análise. Este sequenciamento é uma tendência encontrada em trabalhos recentes, sendo minuciosamente discutido nos capítulos desta dissertação. Finalmente, a fim de se obter enriquecimento prático, foi desenvolvido um sistema de Mineração de Textos que possibilitou a apresentação de resultados reais, obtidos a partir da aplicação de algoritmos em documentos de natureza geral.
The following essay is intended to explore the area of Text Mining, through an extensive and comprehensive study of what is currently considered state of the art. This new area, considered by many as a natural evolution of the Data Mining, is quite interdisciplinary. Several scholars and researchers from fields like linguistics and computing, for instance, have contributed for its development. Nevertheless, much has been discussed on how complete dossier of textual investigation must be carried out, in order to take maximum advantage of the techniques adopted in various approaches. Thus, through a systematic sequence of procedures, one can come to a conclusion of what would be the ideal method for the Mining of documents, as one has come about Data. This work explores a model of process which suggests the following steps: collecting data, textual preprocessing, indexing, mining and analysis. This sequence is a tendency followed in some recent works and it is thoroughly discussed in the chapters to come. Finally, in order to obtain a practical enrichment, one developed a system of Mining of documents with which became possible the presentation of results, obtained from the application of algorithms in documents of a general nature.
8
Pietrzela, Mateusz. "Mining and Sustainability? Systems and Stakeholder Analyses of Uranium Mining in Namibia". Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-204172.
Testo completoAbstract (sommario):
Roughly 10% of the Namibian GDP and over 40% of total exports are dependent on themining sector. Namibia is one of the five leading uranium producing countries worldwide withperspectives to triple the production in the following years. This study aims to identify the implicationsto sustainable development of the country carried by such a strategy to stimulate the economic growth.The complexity of the issue is addressed by an interdisciplinary set of methods leading to a betterunderstanding of processes linking uranium mining in Namibia with the environment, society and theglobal economy. Regulatory, trade and production systems are outlined and assessed, after which astakeholder analysis is conducted in order to determine who are the most influential actors as well asparties affected by the uranium production in Namibia. The results reveal a great dependence of the Namibian uranium mining sector on external factors, with the government perceived as the most affected stakeholder.
9
MacNamara, Liam. "Development of short turn coal spirals". Thesis, University of Nottingham, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243434.
Testo completo
10
Mungu, Mwape. "The relationship between mining and local community development". Diss., University of Pretoria, 2009. http://hdl.handle.net/2263/67829.
Testo completoAbstract (sommario):
This dissertation investigates how mineral resource exploitation intersects with development in Zambia. The main objective is to understand mining contributions to local community development and how these vary according to gender. The study draws empirical insights from Munali nickel mine in the Mazabuka district of Southern Zambia. Findings suggest that the relationship between mineral resource exploitation and development in Zambia has been restructured mainly due to neoliberal political-economic policies of the 1990s. One key outcome is that mining-led development in rural communities was seriously undermined. The research finds that mining-led development benefits men more than women due to the gender relations in the mining sector. Mining is traditionally considered a macho activity, which puts men at an advantage. The dissertation carries the argument that the implementation of IMF and World Bank-sponsored neoliberal political-economic policies compromised mining-led development in Zambia. A focus on neoliberal policies and ensuing privatisation made the country lose the development contributions which mines were making, especially in local mining communities. The subsequent introduction of development agreements did little to improve the situation. In fact, they worsened policy directions, with the country oscillating between tight mining regimes to relaxed ones. One outcome has been uncertainty in mines’ role in the development process, leading to limited benefits to Zambia’s mining communities. Overall, countries such as Zambia, where there is high dependency on mineral resource exploitation for economic growth, prioritising optimal taxation benefits tends to undermine mineral resource-led development, particularly in mining communities.Dissertation (MSocSci)--University of Pretoria, 2017.
Sociology
MSocSci
Unrestricted
11
Breu, Silvia. "Mining and tracking in evolving software". Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.607860.
Testo completo
12
Carter, Assheton Stewart. "Mining companies as agents of development? : corporate social responsibility, participation and local community at mining projects". Thesis, University of Bath, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323581.
Testo completo
13
Allison, Jacqueline. "A computer-based mine development and production management game". Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=28658.
Testo completoAbstract (sommario):
A model of the sequence of decisions required for mine development and production has been formulated and is operated as a computer-based game. The Mine Manager is an operations research game in which the user assumes the role of mine management in the exploitation of a mineral deposit. Potential applications of the game lie in experimentation, policy formulation and education in mine economics. The Mine Manager is described using the terminology of games.The selection of parameters and of the level of detail in the model reflects a compromise between realism and simplicity. At the development stage, the selection of project specifications concerns the mining method and capacity installation. Decisions on cut-off grade and/or cut-off value, capacity utilization, the sequence of mining, stockpiling and expansion are made during the mine life. Decision making takes place within a framework provided by an abstraction of the operating environment of a mine, and must comply with a set of rules. These rules ensure that only feasible decisions are made. Within this constraint, the model offers a high degree of flexibility in setting the values of the decision variables.
The Mine Manager combines elements of geology, mining, management and gaming. Conditional simulation is used to generate grades of copper, zinc and gold in a massive sulphide deposit. Mining operations in both underground and open-pit mines are modelled, and hypothetical capital and operating cost functions are developed for the mine and mill. A pricing model generates new price series for each run of the game.
The Mine Manager is operated interactively on a microcomputer through the use of modular software. The user interface and a sample run of the game are described, and the information displays created by the game are presented.
14
Ahmed, Ayman Abdelfattah Mahmoud. "Development of an integrated mining and processing optimization system". Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2013. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-115401.
Testo completoAbstract (sommario):
Low-grade mineral deposits lead to a very high tonnage excavation with the adherent economical and environmental problems belong to gas emissions and minerals recovery costs, which, accompanied by the higher operational and equipment costs and the higher demand for the mineral resources, lead to increasing of mineral commodities prices, especially metals. These challenges can be overcome through mine planning optimization. Therefore, an approach for the global optimization of the integrated mining and processing operations is designed by a dynamic and simulation model construction. By applying a case study and through mining selectivity strategy, deeply investigation of the ore parameters (especially mineral liberation grain size and hardness), and proper arrangements for the plant facilities, mineral production is realized, with better quality, lower environmental impacts, lower costs, and higher economic benefits.
15
Arellano-Yanguas, Javier. "Local politics, conflict and development in Peruvian mining regions". Thesis, University of Sussex, 2011. http://sro.sussex.ac.uk/id/eprint/6315/.
Testo completoAbstract (sommario):
This thesis examines the effects of a collection of policies that determine the mandatory distribution of mining, gas and oil revenues between national and subnational governments, and the greater involvement of mining companies in local development. I have labelled this set of policies, which aims to reduce social conflict and promote local development, the New Extractive Industry Strategy (NEIS). Chapter 1 describes the implementation of these policies in Peru and highlights their significance to the mining industry worldwide. Chapter 2 describes the methodology of the thesis and introduces the three field research regions. Chapter 3 outlines the national socio-political context for the implementation of the NEIS. Chapters 4–6 deal with the effects of the NEIS on social conflict. I argue that the implementation of the NEIS has not only failed to reduce conflict but has actually exacerbated it. After reviewing the debates linking extraction and conflict (Chapter 4), Chapter 5 demonstrates that conflict is strongly associated with the volume of mining revenue received by sub-national governments. Chapter 6 presents a typology of conflicts that helps to explain the correlation between mining revenue and unrest. In addition to well-known conflicts that are related to the adverse impact of mining on livelihoods and the environment, the study identifies two other types. In the first, peasant communities employ social conflict to increase their bargaining power with the mining companies for material compensation. In the second, the large volume of mining revenue generates disputes over access to or use of these financial transfers. Chapters 7–8 show that the NEIS has not delivered its development promises. Chapter 7 illustrates how regional and municipal governments in receipt of high per capita volumes of mining revenue transfers did not improve their economic and welfare indicators any more than the rest of the country. Chapter 8 proposes that a combination of obstructive political factors trapped regional and municipal authorities and local populations in a myopic political game that prioritised quick short-term spending over any long-term benefits to be gained from better planned expenditure. Finally, Chapter 9 draws some conclusions and makes some suggestions.
16
Ofori-Atta, Kojo S. (Kojo Siaw) 1965. "Valuing project risk and flexibility in mining resource development". Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80186.
Testo completoAbstract (sommario):
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering; and, (S.M.)--Massachusetts Institute of Technology, Sloan School of Management, Technology and Policy Program, 1999.Includes bibliographical references (leaves 63-65).
by Kojo S. Ofori-Atta.
S.M.
17
Jacobs, Andreas [Verfasser]. "Responsible Mining and Local Development in Kenya / Andreas Jacobs". Baden-Baden : Nomos Verlagsgesellschaft mbH & Co. KG, 2016. http://d-nb.info/1110056125/34.
Testo completo
18
Mowerman, Illya. "Data mining in the health care industry /". View online ; access limited to URI, 2007. http://0-digitalcommons.uri.edu.helin.uri.edu/dissertations/AAI3284828.
Testo completo
19
Md, Azmi Ahmad Zharif. "CFD ANALYSIS OF AIRFLOW PATTERNS IN HIGH MINING AREAS OF ROOM-AND-PILLAR COAL MINING". OpenSIUC, 2014. https://opensiuc.lib.siu.edu/theses/1574.
Testo completoAbstract (sommario):
This thesis studies airflow patterns in the face area of a typical room-and-pillar mining area, using Computational Fluid Dynamics (CFD) modeling. This research is designed to develop a scientific understanding of airflow distribution in room-and-pillar mining areas that is fundamental to developing engineering controls. The overall goal of the study is to develop improved engineering controls to minimize dust exposure of mine workers in the face area. Dust exposure can be a health hazard in underground coal mining industry based on historical data of coal workers' pneumoconiosis among underground mine workers. Current regulatory dust exposure standards of 1.5 mg/m3, averaged over an 8-hour period, have been recently revised with approval of new MSHA standards in April of 2014. Mining companies are currently seeking new technologies in order to comply with the new dust standards. Since mining geometries are complex and do not lend themselves to closed-form analytical solutions, CFD numerical modeling approach was used to develop an understanding of airflow distribution in the face areas. Since previous studies had focused on some cuts in mining heights of less than 2.4 m (8-ft), this study was performed for high mining areas of 4.2 m (14-ft). Such mining heights are very common in longwall mine development areas, particularly in the State of Illinois. The primary goal was to identify major differences in airflow between the two mining heights and how they affect development of engineering controls for minimizing dust exposure. Simulations were done using ANSYS software such as DesignModeler for modeling and meshing and FLUENT for calculations. Recirculation (RC) and low air velocity (LAV) zones were located for straight deep cut, straight deepest cut, cross-cut right, cross-cut right mine through, left turn cross-cut, and left turn cross-cut mine through for low mining height (LMH) and high mining height (HMH) with varying air quantity at the end of the line curtain (ELC). Air at the ELC was adjusted to achieve a ratio of 0.85, 1.00 and 1.15 over the wet scrubber fan (WSF) discharge capacity. Results show that the air velocity in HMH case is much lower than for the LMH. In addition, the location of RC and LAV zones differ based on mining height and air quantity at the ELC. Furthermore, lower air quantity at the ELC causes the air exhausted by the WSF to recirculate back to the face area in order to satisfy the WSF requirement. Recommendations to deal with these differences are formulated.
20
Matheis, Michael Roy. "Mining Booms and Busts: New Evidence on the Consequences of Mining in the U.S". Diss., The University of Arizona, 2015. http://hdl.handle.net/10150/556593.
Testo completoAbstract (sommario):
The extraction of natural resources can lead to higher incomes and standards of living for local areas, but resource exploitation, a lack of broad economic development, and an excess amount of environmental pollution can come with this activity. This dissertation analyzes the short and long run economic, public health, and demographic consequences of economic development via natural resources. It expands upon the current non-renewable resource extraction, "resource curse," and local community health literatures by using county data for the entire U.S. spanning over a century, capturing both short and long run impacts over various time periods, on net-migration, mortality, natality, local economic activity, and environmental impacts. What drove coal production in the U.S. during the twentieth century? How effective were the operators at predicting and responding to changes in price? Did coal mining industries provide broad economic benefits to local communities in non-mining sectors? Did the impacts differ over time? Has natural resource extraction activity caused mortality in the area to increase? To answer these questions I collected, compiled, and digitized a long run panel database of county level mining activity, mortality, natality, and pollution spanning the entire U.S. The dissertation identifies the short and long run net effects of natural resource extraction activity with time-varying measures, and an IV approach that isolates changes in local mining activity independent of local conditions and outcomes. The dissertation shows that coal producers responded to variation in prices, and were aware and responded to past price behavior. Chapter 3 shows increased levels of coal production had positive net impacts on county population and manufacturing employment over an initial ten year span, then became negative over the subsequent decade. This provides evidence that the existence of a "resource curse" on local manufacturing is a long run phenomena. Chapter 4 shows that extraction activity increased infant and total mortality, had no impact on contemporaneous total cancer mortality, and may be driven by areas where coal mining was historically prevalent. Past and present mining activity is strongly related to local pollution, supporting the idea that increasing local environmental pollution increases mortality.
21
Forrest, W. "The development of new coal mines". Thesis, University of Nottingham, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378766.
Testo completo
22
Gilby, John L. (John Lawrence). "Study of deformation characteristics of the Donkin-Morien tunnel development". Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59241.
Testo completoAbstract (sommario):
The access tunnels for the Donkin-Morien Mine in Cape Breton, Nova Scotia comprise two parallel tunnels driven through a sedimentary sequence of sandstone, siltstone and mudstone to intersect the Harbour Coal Seam under the Atlantic Ocean, approximately 3.5 km offshore.During the period May 1983 to December 1984, a geotechnical research programme was carried out in the Donkin-Morien tunnels by Golder Associates Ltd. The research programme included the monitoring of the performance of the TBM and drill and blast drivages, and the study of the thrusting characteristics and rock-interaction of the TBM excavation. The main emphasis of the research programme was on the collection of field data, which was to be made available in the form of a comprehensive report. The information gained from the programme was also used during the tunnel drivages to monitor the performance of the installed support and enable changes in the support and advance methods.
Throughout the research programme the author was resident on site at the Donkin-Morien Mine and was responsible for all aspects of the research project.
23
Rösner, Ulrike. "Effects of Historic Mining on Groundwater and Surface Water". Arizona-Nevada Academy of Science, 1996. http://hdl.handle.net/10150/297004.
Testo completo
24
Niang, Aminata. "Mining as Development? Corporate/Community Relationships in the New Gold Mining Sector of West Africa: The Case of Sabodala, Senegal". Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/242396.
Testo completoAbstract (sommario):
This dissertation investigates overall the impacts of the modern extractive mining industry on the lives of local people in the region of Kedougou, and in particular in the villages of Sabodala and Faloumbo. It explores also, how the utilitarian narratives about corporate mining impacts shape both the understanding of the scope of mining- and of corporate-community relationships. Sabodala is one of the many communities all over the world that lack significance in the global economy simply because they are geographically isolated and were abruptly introduced to modern corporate mining. This dissertation investigates the impacts of modern extractive industry on the lives of rural communities in eastern Senegal. It investigates also how utilitarian discourses by the Senegalese state and corporations contradict the reality of corporate social (ir) responsibility in the mining region. Using the lenses of political economy, political ecology and livelihood sustainability, I investigate how governance plays out in the process of implementing corporate social responsibility as a vehicle for local community development. This case study has also shed the light on the fact that the state has neglected ethical issue. Doing an anthropology of place in Sabodala helped me to understand how this place is "wired" into the global market of gold and how this new "order" creates "disorders" at the local level. For example and interestingly, the realignment of power relations in the community was responsible for tensions, conflicts and de-structuring social cohesion and traditional stratification, as some members of the community have seen their economic status changed overnight while others were deprived. In reality, the expected grand benefits haven't "trickled down" to the wider society, and to paraphrase Ferguson, industrial mining in Senegal is not "socially thick". Meanwhile, as the pace of gold mining increases in Sabodala so too, do its rapacious demands on local natural resources (land, water, flora, and fauna), which simultaneously affect local livelihoods system.
25
Hudyma, Martin Raymond. "Development of empirical rib pillar design criterion for open stope mining". Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28386.
Testo completoAbstract (sommario):
The design of open stope rib pillars has been done using many empirical methods, but none of the methods has been verified with a design survey. This thesis uses data collected in the "Integrated Mine Design Study" to develop an empirical rib pillar design method for open, stope mining. The method is called the "pillar stability graph".
The design variables in the method are: the compressive strength of the intact pillar material, the average pillar load determined by numerical modelling, the pillar width and the pillar height. The graph has been refined with the use of more than 80 literature case histories of hard rock pillars in room and pillar mining.
The pillar stability graph and the pillar data base are used to examine the applicability of empirical methods commonly used in open stope rib pillar design. The investigation found the pillar strength curves developed by Hoek and Brown (1980) may be useful under some conditions for the design of open stope rib pillars but formulas by Hedley (1972), Obert and Duvall (1967) and Bieniawski (1983) are not applicable.
Guidelines, using the pillar stability graph method, are proposed for the design of permanent open stope rib pillars, stable temporary open stope rib pillars, and failing temporary open stope rib pillars.Applied Science, Faculty of
Mining Engineering, Keevil Institute of
Graduate
26
Park, Yearn Hong. "Economic optimization of mineral development and extraction". Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=39748.
Testo completoAbstract (sommario):
This study examines the issue of economic optimization associated with mine development and extraction decisions, focusing on the choice of an appropriate installed capacity as well as the control of the cutoff grade and capacity utilization variables. It shows how capacity and production strategies lead to an enhanced economic outcome of resource development and extraction.An important aspect of the study is the development of deterministic algorithms for cutoff grade and production rate optimization within existing mine facilities. These variables are determined by maximizing the present value of future benefits associated with mine production. Two opposing economic forces are at play in the optimizing process. A higher present value can be achieved by increasing operating profits through a higher cutoff grade and/or extraction rate. This strategy decreases the losses due to discounting. However, a higher cutoff grade generally leads to higher operating costs, and may also result in the loss of ore. A higher production rate within an existing mining system, likewise, increases unit operating costs. These reduce operating profits and act to lower the present value.
Both static and dynamic optimization methods are developed. Static optimization refers to determining the constant cutoff grade and production rate that maximize the total discounted operating profits. Dynamic optimization refers to the situation in which periodical adjustments are allowed for the production variables. In this case, declining cutoff grade and production rate schedules within an established mining system yield higher total discounted profits over the static solution. In general, the schedule is controlled by the discount rate, as well as by trade-offs between ore quality and reserves, and between production rate, cutoff grade and production costs.
The study subsequently focuses on the choice of installed capacity at the mine development stage. The objective here is to find the installed capacity level that maximizes the net present value of the project. The consideration of capital costs alone tends to limit the increase in installed capacity. The preproduction period has a similar effect. When both variables are combined, the increasing preproduction period and capital costs associated with higher levels of installed capacity impose a severe burden on the maximization process, causing limitations to the rising trend of optimum installed capacity at high discount rates.
27
Di, Boscio Nicolas. "Mining enterprises and regional economic development : an exploratory analysis of the sustainable development model". Thesis, London School of Economics and Political Science (University of London), 2010. http://etheses.lse.ac.uk/310/.
Testo completoAbstract (sommario):
Towards the end of the 1990s, and in response to increasing global condemnation, the mining industry adopted sustainable development (SD) principles and standards through corporate social responsibility (CSR) initiatives. This approach not only proposed a dramatic change in the operating practices of large mining houses, but also suggested a grand vision for the industry as a long term catalyser of local economic growth. This research now investigates the effect that mining enterprises which operate under these principles have on sub-national economic development. In doing so, it undertakes multiple case-study analysis, focussing on a single firm, Rio Tinto, and covers three of its subsidiary companies at various stages of development. Consistent with claims by mining advocates, this work confirms the frequently striking importance that large mines have for sub-national economies. However, this investigation disagrees with the emphasis typically attributed to each stream of benefits and brings attention back to the use that mining cash flows are put to. More generally, the study argues that the potential for large mining firms to trigger endogenous growth has been underestimated. On the one hand, these enterprises can contribute distinctly to local capital accumulation; on the other, under certain circumstances, they can also help sustain increases in local productivity endogenously. Indeed; while local preconditions will determine socioeconomic outcomes to a significant degree, mining companies can play a critical part in economic planning and the building of innovative institutions, which could, in turn, help increase the underlying local rate of technological absorption, human capital and overall capacity for economic governance. This entails a drastic (and controversial) change from the role previously assumed by companies. Yet, this study also concludes that, in some other cases, SD has promoted unattainable economic expectations. In these cases, minimising the local impact of mining would be a more advisable economic strategy.
28
Shnorhokian, Shahe. "Development of a quantitative accelerated sulphate attack test for mine back fill". Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=40712.
Testo completoAbstract (sommario):
Mining operations produce large amounts of tailings that are either disposed of in surface impoundments or used in the production of backfill to be placed underground. Their mineralogy is determined by the local geology, and it is not uncommon to come across tailings with a relatively high sulphide mineral content, including pyrite and pyrrhotite. Sulphides oxidize in the presence of oxygen and water to produce sulphate and acidity. In the concrete industry, sulphate is known to produce detrimental effects by reacting with the cement paste to produce the minerals ettringite and gypsum. Because mine backfill uses tailings and binders – including cement – it is therefore prone to sulphate attack where the required conditions are met. Currently, laboratory tests on mine backfill mostly measure mechanical properties such as strength parameters, and the study of the chemical aspects is restricted to the impact of tailings on the environment. The potential of sulphate attack in mine backfill has not been studied at length, and no tests are conducted on binders used in backfill for their resistance to attack. Current ASTM guidelines for sulphate attack tests have been deemed inadequate by several authors due to their measurement of only expansion as an indicator of attack. Furthermore, the tests take too long to perform or are restricted to cement mortars only, and not to mixed binders that include pozzolans. Based on these, an accelerated test for sulphate attack was developed in this work through modifying and compiling procedures that had been suggested by different authors. Small cubes of two different binders were fully immersed in daily-monitored sodium sulphate and sulphuric acid solutions for a total of 28 days, after 7 days of accelerated curing at 50ºC. In addition, four binders were partially immersed in the same solutions for 8 days for an accelerated attack process. The two procedures were conducted in tandem with leach tests using a mixed solution ofLes opérations minières produisent de grandes quantités de rejets miniers qui sont soit stockés en surface dans des haldes, soit réutilisés comme remblais sous terre. La minéralogie de ces déchets est dictée par la géologie des lieux, et il est commun de trouver des rejets qui ont une teneur élevée en minéraux sulfurés comme la pyrite et la pyrrhotite. Les sulfures sont oxydés en présence d’eau et d’oxygène et produisent une eau acide et riche en sulfates. Dans l’industrie du béton, un des grands problèmes provient de la réaction des sulfates de sources externes avec le ciment du béton pour former de l’ettringite et du gypse. Étant donné que les remblais dans les mines se servent des rejets et d’agents de liaison comme le ciment, ils sont sensibles aux attaques des sulfates si les conditions sont propices. En ce moment dans les laboratoires, on s’intéresse surtout aux paramètres mécaniques comme la résistance en compression et l’impact chimique que les rejets miniers ont sur l’environnement. Aucune recherche concrète n’a été faite sur les dangers de l’attaque des sulfates sur les remblais dans les mines et sur les différents agents de liaisons, afin de déterminer leurs résistances à de telles attaques.Les directives actuelles de l’ASTM pour tester l’attaque des sulfates se sont avérées inadéquates. En effet, ces tests sont seulement basés sur l’expansion, ce qui ne se produit pas forcément lors de l’attaque par des sulfates. De plus, ces tests sont trop longs et ne peuvent s’appliquer qu’à certains mélanges spécifiques de ciment et pas à d’autres comme la pouzzolane. Sur ces faits, un test accéléré a été mis en place par certains chercheurs. Après un séchage accéléré dans un four à 50ºC, des échantillons sont immergés dans des solutions de sulfate de sodium et d’acide sulfurique pendant 28 jours d’une part. D’autre part, d’autres échantillons sont immergés à moi
29
Walker, S. C. A. "Development of mining electrical technology with special reference to south Midlands area". Thesis, University of Nottingham, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372023.
Testo completo
30
Demirbilek, S. "The development of a spontaneous combustion risk classification system for coal seams". Thesis, University of Nottingham, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.481567.
Testo completo
31
Ruiz, Castell María de la Concepción 1981. "Environmental contamination and infant development in a Bolivian mining city". Doctoral thesis, Universitat Pompeu Fabra, 2012. http://hdl.handle.net/10803/109261.
Testo completoAbstract (sommario):
Background: Oruro is a mining city in the Bolivian highlands. Most of its citizens are exposed to polymetalic cocktails. This study aims to determine whether the neuropsychological development of one year-old children can be associated with 1) polymetalic exposures and/or 2) growth patterns.
Methods: The thesis builds from data collected by the ToxBol multidisciplinary project. The health task was centred on the follow-up of a birth-cohort that set to evaluate child development. Children were examined at 11 and 12 months of age using the Bayley Scale of Infant Development (BSID).
Results: 1) Analyses revealed no high concentrations of metals in the blood of pregnant women. 2) No neuropsychological anomalies were observed in association with metal concentrations or growth patterns. 3) A positive association was observed between low lead values in blood and the neuropsychological development of children. 4) During the first 6 months of life, growth rate was negatively associated with weight at birth and positively associated with the BMI at 12 months of age.
Conclusion: Although heavy metallic pollution was demonstrated by environmental studies, unexpected low levels of exposure were registered from pregnant women. Neither the level of exposure to metals nor the growth patterns appear to have an impact on child neuropsychological development. We argue that the positive effect that was observed in association to lead might be caused by factors such as diet.Antecedentes: Oruro es una ciudad minera del altiplano boliviano. Muchos de sus habitantes están expuestos a un cóctel polimetálico. El objetivo principal es el de determinar si existe una asociación entre desarrollo neuropsicológico de los niños de un año y 1) la exposición polimetálica y/o 2) los patrones de crecimiento. Métodos: Esta tesis está basada en los datos recogidos del Proyecto multidisciplinario ToxBol. Se realizó el seguimiento de una cohorte de niños para evaluar su desarrollo. Para evaluar el desarrollo neuropsicológico de los niños se utilizaron las escalas de Bayley de desarrollo infantil (BSID). Resultados: 1) No se observaron altas concentraciones de metales en sangre de las mujeres embarazadas. 2) No se observaron anormalidades neuropsicológicas en relación con concentraciones de metales o patrones de crecimiento. 3) Se observó una asociación positiva entre exposiciones bajas de plomo y el desarrollo neuropsicológico del niño al año de vida. 4) La velocidad de crecimiento, desde el nacimiento hasta los 6 meses, se asoció negativamente con el peso al nacer y positivamente con el BMI a los 12 meses. Conclusión: A diferencia de lo demostrado en otros estudios epidemiológicos, se observó una inesperada baja exposición. No se observó una relación entre el grado de exposición a metales- o los patrones de crecimiento -y el desarrollo neuropsicológico del niño. El efecto positivo del plomo creemos que se debe a otros factores como la dieta.
Antecedents: Oruro es una ciutat minera del altiplà Bolivià. La població es troba es contacte amb fonts de contaminación polimetàlica. L’objectiu principal es el de determinar si existeix una associació entre el desenvolupament neuropsicològic dels nens d’un any i 1) la exposició polimetálica i/o 2) patrons de creixement. Mètodes: Esta tesi està basada en dades del Projecte multidisciplinari ToxBol. La tasca de salut es va centrar en el seguiment del desenvolupament d’una cohort de nens. El desenvolupament neuropsicològic infantil es va avaluar amb les escales de Baley de Desenvolupament infantil (BSID). Resultats: 1) No es van observar concentracions altes de metalls en sang de les dones embarassades. 2) No es va observar anormalitats neuropsicològiques en realció amb les concentracions de metalls o patrons de creixement. 3) Es va observar una associació positiva entre concentracions baixes de plom en sang i el desenvolupament neuropsicològic dels nens d’un any. 4) La velocitat de creixement, des del naixement fins els 6 mesos, es va associar negativament amb el pes al néixer i positivament amb el BMI als 12 mesos. Conclusió: A diferencia del que esperàvem, es van registrar baixes concentracions de metalls a les dones embarassades. Tampoc s’observa una relació entre el grau d’exposició a metalls, o patrons de creixement, i el desenvolupament neuropsicològic del nens. El efecte positiu que observem del plom, pensem que es deu a altres factors com la dieta.
32
Berkani, Mahieddine. "Development of an encapsulated ice air cooler for mining use". Thesis, University of Leeds, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305841.
Testo completo
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Holman, Darren Wayne. "Development of an Underground Automated Thin-Seam Coal Mining Method". Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/32935.
Testo completoAbstract (sommario):
It is predicted that coal mining in Southwest Virginia, and the economic stability that it brings to the area, will continue to decline over the next decade unless an environmentally sound, and economically viable means can be found to extract seams of high quality coal in the thickness range of 14 to 28 inches. Research into autonomous machine guidance, coupled with developments of thin-seam mining equipment, offer new opportunities for devising mining layouts suitable for extracting these thin seams in a cost effective manner. These layouts must involve well-planned transportation and ventilation routes that will allow safe conditions for personnel. This implies that the mining face, where coal is extracted, will be completely automated, ensuring the safety of the workers.
This thesis presents a brief overview of current technologies utilized for underground coal mining in the United States. This is followed by a review of developments in highwall mining that are potentially applicable in underground mining of thin seams. Some past attempts at thin seam mining are discussed, and evaluated for their short comings. An overview of the more recent advances in the guidance systems for use in autonomous mining machines is also presented. The new advances that several manufacturers are developing to address the integration of mining and continuous haulage systems are also investigated. That background is employed in devising a conceptual mining system for the underground mining of coal seams in the 14 to 28 inch range of thickness. This thesis proves that adapting new technologies and concepts from existing ones can lead to meaningful advances in the field of natural resources recovery. This system utilizes a newly designed panel layout that takes into account haulage, supplying, ventilation, equipment, and machine guidance. This system is proposed to show that new ways can be developed to take advantage of the reserves in the 14 to 28 inch range of thickness. This shows that new technology and design innovation can turn currently uneconomic resources, into economic reserves. This kind of innovation is what is needed to keep this region of Southwest Virginia economically viable.
This system is a huge step in the direction that thin-seam research needs to take. Most of the equipment suggested for this proposed system is already available.Master of Science
34
Haynes, Michael J. "Mining, dependence, and post-independence urbanisation in Botswana : sustainable development?" Master's thesis, University of Cape Town, 1990. http://hdl.handle.net/11427/15422.
Testo completoAbstract (sommario):
Bibliography: leaves 187-197.Botswana has been considered as one of the few post-independence development successes in Africa. The country's recent status is attributable to the growth of the minerals sector, with diamonds and copper/nickel matte forming the basis of exports and government development revenues. Mining has not only been responsible for boosting export earnings, but has also stimulated most recent urbanisation, resulting in the some of the highest urban growth rates in sub-Saharan Africa. The problem of urban in-migration has been compounded by a bias in development expenditure, with the towns receiving a disproportionately large share of scarce resources. All new towns since independence have been established as service centres for the mines, with limited wider development occurring. Resultant vulnerability and instability in the urban sphere has been reflected in the case of Selebi-Phikwe, where a decline in the copper/nickel industry has threatened the future integrity of the town. That mining has not contributed towards development which is sustainable over the long terms calls into question, the resilience of Botswana's progress. A political-economic analysis of the development history of Botswana indicates a continuity between colonial neglect and the migrant labour system, and the current problems of dependence on the mining sector and external employment opportunities. The reasons for the dearth in diversified productive activity in mining towns in Botswana are related to an externally orientated development policy, with dependence on the world mineral markets. As the mining industry is based on the extraction of finite, non-renewable resources and is susceptible to fluctuations in mineral pricing, towns exclusively based on mining are latently unstable and have similarly finite lives. The problem is compounded by the lack of a local entrepreneurial class capable of stimulating the 'modern' sector which is related to the historical lack of an urban elite in the country. Given that there has been minimal associated development of productive opportunities outside of the primary sector in Selebi-Phikwe, the Government has instituted a crisis management strategy to deal with the situation. Proposals to diversify the economic base of Selebi-Phikwe are focused on attracting foreign investment, as a means of stimulating local, export-orientated industrialisation. As the incentives for locating in the town are primarily based on cheap, malleable, labour supplies, transnational investment is likely to be of a highly mobile nature and is unlikely to sustain employment and development in Selebi-Phikwe Certain conclusions are drawn from the experience of Selebi-Phikwe: Firstly, the problem of continuity in Selebi-Phikwe has historical roots indicating that short term panaceas are unlikely and that structural solutions are needed. Secondly, the town's fate holds important implications for the maintenance and support of the wider urban system in Botswana. Thirdly, expectations of indefinite economic prosperity have been generated in part, by continual Government emphasis on urban infrastructural development, something which is potentially problematic given the potential for urban discontinuity. A more rational evaluation of the urban sector in Botswana is required. With the precarious foundations of urbanisation in Botswana borne in mind, surplus revenues generated by mining should be channelled into rural employment creation rather than urban areas. An approach which treats the urban question in its entirety is required. There is thus a real need for a national development programme which integrates population and environmental policy with rural and urban sector planning, and which bases future development on the criteria of equity and sustainability.
35
Altamirano, Nelson. "Essays on mining countries : Dutch disease, development and copper markets /". Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC IP addresses, 2000. http://wwwlib.umi.com/cr/ucsd/fullcit?p9975891.
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36
Gaynor, Michelle. "African mining regime reform: Is the Western Australian experience of resource development aligned with the Africa mining vision?" Thesis, Gaynor, Michelle (2014) African mining regime reform: Is the Western Australian experience of resource development aligned with the Africa mining vision? Honours thesis, Murdoch University, 2014. https://researchrepository.murdoch.edu.au/id/eprint/25661/.
Testo completoAbstract (sommario):
The question posed by this paper is whether the development of mineral resource policies in Western Australia is aligned with the goals of inclusive growth and sustainable development expressed in the Africa Mining Vision which was drafted in 2009. In exploring Africa’s transition from an object of investment to an agent of investment, the history of mining in Africa and the dominant narratives that have often explained and constrained Africa’s development have been explored. Africa’s early resource development experience was shaped by colonial intervention and by the impact of World Bank Group interventions. An analysis of some of these reforms has been made. Overall, while World Bank Group interventions did increase investment into Africa’s extractive industries, there were also significant negative impacts to African governments and African people. African countries now seek to be the stewards of their own development. One avenue for African development is through the promotion of their mineral industries. Western Australia has recently signed a Memorandum of Understanding with COMESA Member States to assist these states in promoting their mineral industries. The development ideology of Western Australia’s mineral industry is explored and compared to statements contained in the Africa Mining Vision. It is argued that the experience and ideology of resources development in Western Australia is not aligned with the goals of expressed in the Africa Mining Vision.
37
Niestroj, Christian, Andreas Schulten, Fabian Uth, Sascha Schade, Tobias Hartmann, Thomas Bartnitzki e Danny Maat. "Development of an underground positioning system". Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2018. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-231152.
Testo completoAbstract (sommario):
For quite some time, there has been extensive research into different technologies for indoor positioning systems. Of these systems only a handful are suitable for employ in an underground mining environment. Especially as GPS is not available in underground environments, alternative systems need to be employed. Many of the currently available technologies lack the necessary precision and robustness needed to enable automation of mobile equipment. Modern approaches now look into combining different technologies to harness the best features of each candidate compensating for deficits of the other systems.
In the Horizon 2020 funded Real-Time Mining research project, the Institute for Advanced Mining Technologies of RWTH Aachen University together with the Netherlands Organisation for applied scientific research (in Dutch: TNO) are also conducting research in this field. The goal is to develop an underground positioning system based on the combination of inertial measurement units (IMU), ultra-wideband radio technology (UWB) and geometrical sensors. While the partner TNO is developing a new IMU system based on the TNO DriftLess technology, RWTH Aachen University is focussing on the UWB part and laser-scanners. In the end, through shrewd sensor fusion the different technologies will be combined to enable precise localisation of mobile equipment in underground environments.
Taking a closer look at the UWB technology, next to hardware and software developments, different measurement campaigns were undertaken during the time of this research project. It was found that the precision and accuracy as well as the robustness of the ultra-wideband radio technology is sufficient for the mining context. Hence, in this contribution, we will present our findings during the development of an underground localisation system for the ultra-wideband radio technology.
38
Kim, Tae-Goun. "Managing marine resource use conflicts : marine sand mining in Korea /". View online ; access limited to URI, 2007. http://0-digitalcommons.uri.edu.helin.uri.edu/dissertations/AAI3284825.
Testo completo
39
Manser, R. J. "The study and development of a mathematical model of a shaking table concentrator". Thesis, University of Exeter, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376470.
Testo completo
40
Mtshali, Sithembile Nokwazi. "Developing a South African services agenda : case study of the mining services sector". Master's thesis, University of Cape Town, 2015. http://hdl.handle.net/11427/20083.
Testo completoAbstract (sommario):
The services sector accounts for approximately 70% of South Africa's gross domestic product (GDP) and has emerged as one of South Africa's key exports with regional and global destinations. The sector is also a key provider of employment registering just above 8.5 million jobs in March 2014, according to Statistics South Africa. It is for this reason that the sector has been earmarked to give the required impetus to realise the export driven growth, which underpins the current government strategy for economic development and growth. Using the mining services sector, as a case study, this study highlights the importance of services, as an important input to operating costs in the production and manufacturing sectors. It further highlights the importance of services in determining the competitiveness of the manufacturing and production sectors, through effective sourcing and more importantly availability. This is done in the context of the growing African market, especially the mining sector and the opportunities presented by new mineral discoveries in Africa. This study is presented to support the development of a strategic and comprehensive trade strategy for services. Tracking the development of South Africa's trade policy, the rationale for the different positions that have been taken by government are presented to illustrate how government has used trade policy as a tool to advance its objectives at varying stages of South Africa's economic development. The study thereafter undertakes an analysis of the current trade policy to better understand how government view the role that is to be played by trade policy in supporting economic development. This analysis identifies gaps within the current trade policy in terms of the role that trade policy ought to play.
41
Jones, Alan Victor. "The introduction and development of electricity in the South Wales coal industry to 1926". Thesis, Cardiff University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268321.
Testo completo
42
Bezuidenhout, Hendrik Cornelius. "The development of a new non-metallic explosives initiator". Thesis, Cape Peninsula University of Technology, 2017. http://hdl.handle.net/20.500.11838/2576.
Testo completoAbstract (sommario):
Thesis (DTech (Chemical Engineering))--Cape Peninsula University of Technology, 2017.Explosives are used to achieve certain functions in diverse environments, including mining, civil construction, military operations, and demolition. Irrespective of the application, the basic principle of augmentation of energy applies. Energy in the form of heat and shock is released by an initiator. This energy is taken up by an intermediary charge, which in turn propagates to the main explosive charge. Ultimately the energy released from the main explosive charge performs the functions. Initiating systems make use of this exact principle within their own boundaries of confinement. The rate at which this energy transfer takes place as well as the magnitude of augmentation is to a great extent influenced by parameters such as the type of confinement, chemical composition and density of the explosives, as well as other environmental conditions. Traditionally lead azide has been used as the primary explosive component in an initiating system. Pressure from international environmental agencies has discouraged the use of heavy metals in commercial products. Nano-porous silicon has been used together with an oxidiser to form an explosive mixture. The literature has shown that nano-porous silicon-based explosive formulations are sensitive enough to pick up from the energy released by the pyrotechnic composition. The reaction of such nano-porous silicon explosive compositions changes from a deflagration to a detonation. However, their ability to initiate the base charge of an initiating system has not yet been demonstrated. A nano-porous silicon/nitriminotetrazole-based explosive system was developed and characterised. A relative reactivity concept was developed and successfully used to further characterise the new nano-porous silicon explosive. The lead azide primary explosive replacement has been shown to be sensitive enough to pick up from the heat output generated by the delay composition and strong enough to reliably initiate the base charge explosive. The performance of the base charge explosive is primarily a function of its density and the confinement it is used in. An explosive system was developed whereby the base explosive was coated with a polymer to give it compressible characteristics. A ballistic ball indentation evaluation method was developed and effectively applied to characterise explosive performance behaviour under various conditions, including density and confinement. Explosive pellets, pressed separately and at a higher density, have been shown to increase performance compared with explosives consolidated inside an aluminium casing.
43
Karul, Saban Ali 1951. "Turkey's asbestos: Trends and development". Thesis, The University of Arizona, 1987. http://hdl.handle.net/10150/291669.
Testo completoAbstract (sommario):
The asbestos resources in Turkey should be exploited in a carefully planned manner for two reasons: (1) to minimize the health hazards associated with the mining and processing of asbestos, and (2) to avoid wasteful exploitation for the sake of making profit. Its consumption should be optimized by using it for the critical applications only, where its unique properties are essential. Turkey's asbestos resources and alternative minerals to asbestos should be exploited to assist in its economic development. However Turkey must control the environmental and occupational hazards associated with the production of these commodities if it is to avoid the loss experience of other developed countries. The hazards associated with the use of asbestos in many noncritical applications have raised the demands for substitute materials which are less hazardous. Turkey is in a position of developing and marketing many of the substitute materials by exploiting some of its industrial minerals.
44
Gorman, Joe, Glenn Takata, Subhash Patel e Dan Grecu. "A Constraint-Based Approach to Predictive Maintenance Model Development". International Foundation for Telemetering, 2008. http://hdl.handle.net/10150/606187.
Testo completoAbstract (sommario):
ITC/USA 2008 Conference Proceedings / The Forty-Fourth Annual International Telemetering Conference and Technical Exhibition / October 27-30, 2008 / Town and Country Resort & Convention Center, San Diego, CaliforniaPredictive maintenance is the combination of inspection and data analysis to perform maintenance when the need is indicated by unit performance. Significant cost savings are possible while preserving a high level of system performance and readiness. Identifying predictors of maintenance conditions requires expert knowledge and the ability to process large data sets. This paper describes a novel use of constraint-based data-mining to model exceedence conditions. The approach extends the extract, transformation, and load process with domain aggregate approximation to encode expert knowledge. A data-mining workbench enables an expert to pose hypotheses that constrain a multivariate data-mining process.
45
Jones, Tristan H. "Development of a high-resolution target movement monitoring system for convergence monitoring in mines". Diss., Rolla, Mo. : Missouri University of Science and Technology, 2008. http://scholarsmine.mst.edu/thesis/pdf/Jones_09007dcc804d4863.pdf.
Testo completoAbstract (sommario):
Thesis (Ph. D.)--Missouri University of Science and Technology, 2008.Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed May 6, 2008) Includes bibliographical references (p. 229-235).
46
Amores, Diogo Alexandre Santos. "Mining GitLab repositories for software development activities". Master's thesis, 2021. http://hdl.handle.net/10316/97983.
Testo completoAbstract (sommario):
Dissertação de Mestrado em Engenharia Informática apresentada à Faculdade de Ciências e TecnologiaCom a crescente complexidade da sociedade moderna, as organizações tornam-se cada vez mais conscientes das melhorias potenciadas por Process Management para melhor fluxos de trabalho e otimizar recursos. Mining Software Repositories, inicialmente um tópico de pesquisa obscuro, cresceu para fornecer contribuições inestimáveis no campo de process management. Estas contribuições foram possibilitadas pelo aumento no uso de repositórios de software, dados de evento disponíveis e projetos open-source.Em particular, repositórios de software como GitLab e GitHub contêm uma quantidade vasta de dados que são considerados de particular interesse para cientistas neste campo. Mining Software Repositories visa alterar a função puramente de armazenação destes repositórios para ferramentas que possam ajudar a moldar e melhorar o processo de desenvolvimento de software. Os dados que estes repositórios contêm fornecem informação sobre os diferentes estados de um projeto durante o desenvolvimento, como o histórico de alterações feitas em cada ficheiro bem como os autores responsáveis. Devido a isto, estes repositórios apresentam um excelente ponto de partida para a análise de projetos e fornecem uma oportunidade para melhor entender como um projeto está a ser conduzido, se as metodologias estabelecidas, planos e distribuição de trabalho são comparáveis à execução prevista.O objetivo principal da presente tese é explorar estes repositórios de software de modo a extrair informação que pode ser útil para monitorizar projetos de software. Este tipo de informação pode ser extremamente valiosa de modo a melhorar a eficácia de equipas de desenvolvimento e identificar eventuais problemas com a devida antecedência, a fim de melhorar a qualidade do software produzido. Estes dados podem também fornecer informações relativas às práticas de desenvolvimento de membros individuais de uma equipa.Para atingir este objetivo, uma ferramente que usa repositórios git (como GitHub e GitLab) como fonte principal para extrair logs de evento foi desenvolvida pelo autor. O objetivo desta ferramenta é extrair estes dados e estabelecer um método para categorizar os diferentes conteúdos do repositório em atividades de desenvolvimento de software (como Code ou Test). Após esta categorização, vários aspetos dos logs serão analisados e exibidos ao usuário através de uma interface visual simples e acessível.
With the growing complexity of modern societies, organizations become increasingly conscious of the improvements made possible by Process Management to improve workflows and optimize resources. Mining Software Repositories, initially an obscure research topic, has grown to provide invaluable contributions to the field of process management, made only possible by the exponential increase in the usage of software repositories, available event data, and open-source projects.In particular, software repositories such as GitLab and GitHub contain vast data that is considered of particular interest to researchers in this field. Mining Software Repositories aims to shift these repositories from purely storage spaces to actual tools that help in shaping and improving the development process. The data these repositories contain provide information about the different states of the project during development such as the history of every change made to every file and the responsible contributors. Due to this, these repositories present an excellent starting point for project analysis and provide an opportunity to better understand how a project is being conducted, if established methodologies, schedules, and if work distribution is comparable to the envisioned execution.The primary goal of this thesis is to mine these software repositories and extract information that can be useful for monitoring software projects. This information can prove extremely valuable in order to improve the effectiveness of teams and identify issues early in order to improve the quality of the produced software. It can also provide insight into the development practices of individual team members.To achieve this goal, a tool that uses git-based repositories (such as GitHub and GitLab) as the main source to extract event logs was designed and built by the author. The aim of this tool is to extract this data and establish a method to categorize the different contents of these repositories into software development activities (such as Code or Test). After this categorization, multiple aspects of the log will be analyzed and displayed to the user via a user-friendly visual interface.
Universidade de Coimbra - Bolsa de Iniciação à Investigação no âmbito do projeto CISUC-SSE 717532
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Sinding, Sinding Knud Knud. "Mineral development and mining policy in Greenland". Thesis, 1994. http://hdl.handle.net/2429/6871.
Testo completoAbstract (sommario):
The present document analyzes the economy of Greenland, a Danish self-governing territory
and highlights the narrow resource base of the Greenlandic economy. To provide the founda
tion for an analysis of the mineral policies that have been followed in the past, and for the pro
posed reform of these policies, three areas of relevance are identified, economic impact and longterm
sustainability, taxation and economic regulation, and technical regulation. In each of these
areas, the literature is analyzed, and a range of practical solutions are surveyed.
A detailed analysis of past and present mineral policy in Greenland is conducted, which
concludes that investment is insufficient, and that the structure of the policy is unsuitable in a
number of areas. Based on these conclusions, and on the analysis carried out in the three areas
identified, a completely new policy is proposed. This proposal includes both a detailed part
dealing with the direct management issues relevant to the drafting of a new mining law, and a
more general discussion of the wider management issues, including management of mineral rent
under the special revenue sharing principle between Greenland and Denmark, as well as em
ployment and town-site development.
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Ram, Pankajkumar Kanchan. "Development of a Needle Penetrometer Device and Evaluation of its Performance". Thesis, 2016. http://ethesis.nitrkl.ac.in/9286/1/2016_MT_PKRam.pdf.
Testo completoAbstract (sommario):
Mining and excavation activities involve dealing with earth materials typically rock mass of varying properties. The mechanical properties of rocks play major in successful excavation process. However the determination of correct strength values is a challenge as rock properties vary widely. Obtaining the right sizes for strength test are very difficult due to structural variation. Innumerable attempts have been made to predict rock properties. Needle penetrometer is one such unit developed to predict compressive strength of rock from the surface testing. It measures the surface behavior and correleate the same with the compressive strength parameter. In this investigation a needle penetrometer using mild steel material has been developed as per the ISRM (2014) suggested guidelines. Different parts were fabricated and one unit was prepared. Five different coal samples collected from varying depth from 480 m to 580m and their behavior were measured. Both th unconfined compressive strength and needle penetration index values of these sample were determined. Six established approaches Ulusay and Erguler (2012), Aydan (2012), Uchida et al. (2004), Okada et al. (1985) and Takahashi et al. (1988) and Yamaguchi et al. (1997) were compared with the measured results. It was observed that the measured values compared favourably with that of Okada et al. (1985)
49
Asif, Mohammad. "Development of Cost Estimation Tool". Thesis, 2013. http://ethesis.nitrkl.ac.in/4781/1/109CS0630.pdf.
Testo completoAbstract (sommario):
Unified Modeling Language (UML) is a standardized general-purpose modeling language in the field of software engineering. The Unified Modeling Language includes a set of graphic notation techniques to create visual models of object-oriented software-intensive systems. In software engineering, a class diagram in the UML is a type of static structure diagram that describes the structure of a system by showing the system's classes, their attributes, operations (or methods), and the relationships among the classes. The aim of my project is to develop a tool to estimate the cost of a software using UML class diagram. This is achieved by converting UML class diagram to XML (Extensible Markup Language) representation. XML is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable. By using the concept of class point approach, it calculates the total number of adjusted class point by parsing the XML file. First step for development of cost estimation tool requires understanding the concept of UML and XMI (XML Metadata Interchange). XMI is an Object Management Group (OMG) standard for exchanging metadata information via Extensible Markup Language (XML). The most common use of XMI is as an interchange format for UML models, although it can also be used for serialization of models of other languages. Conversion of UML class Diagram to XML representation using Magic Draw for parsing. Creating a XMI parser to find the NEM (Number of External Methods), NSR (Number of Service Requested) and NOA (Number of Attributes) and the type of classes. Using class point object oriented approach, calculate the effort required to develop a software system by NEM, NSR and NOA. Information procession size estimation includes identification and classification of classes, evaluation of complexity level of each class using 24 different type of drivers, estimation of the Total Unadjusted Class Point.
50
Singh, Vikrant Dev. "Design of systematic support system for development and depillaring in underground coal mines". Thesis, 2013. http://ethesis.nitrkl.ac.in/4831/1/109MN0016.pdf.
Testo completoAbstract (sommario):
Bord and pillar method is the most widely practiced underground mining method in India. Nevertheless about 61% of underground coal mining accidents are due to roof and side fall of bord and pillar. Design of systematic support is essential to avoid strata control problem and to provide safe working condition. Three distinct methodologies; empirical approach, numerical modeling and field monitoring were followed and compared in the project to provide a comprehensive design of systematic support. A case study of 1AS2 panel of RK-6 Incline, SCCL is chosen for the design of systematic support. The empirical design of support is developed using RMR and Q-system and validated with numerical modeling and field monitoring. The systematic support developed by RMR with factor of safety greater than 2 for the gallery was 1.5 m spacing of 1.8 m full column grouted bolts with spacing of 1.4 m between rows. Junction support was 33% extra full column grouted bolts. Systematic support designed for slices and goaf edges with Q-System was skin to skin chocks with corner props and breaker line bolt with 1 m spacing. Maximum convergence measured with telescopic convergence rod in the field at the station 6F- 57LS was 48 mm. Maximum deformations observed by numerical modeling in the gallery was 58 mm. The numerical model was almost validated with the field monitoring data with 17% approximation, thus the numerical model can be used for prediction of strata behavior of future working.