• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 7
  • 4
  • Tagged with
  • 12
  • 12
  • 5
  • 4
  • 3
  • 3
  • 3
  • 3
  • 3
  • 3
  • 3
  • 2
  • 2
  • 2
  • 2
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Analysis of seepage, contaminant transport, compaction and safety of the Zhaoli ditch dam, a tailing reservoir : A modeling study of a tailing reservoir with GeoStudio / Att analysera föroreningstransport, vattenläckage samt stabilitet och säkerhet baserade påZhaoli ditch dammen

Wang, Veronika Wei January 2021 (has links)
Inthe mining industry people remove rock from the ground to obtain a metal ore. Afterprocessing , the uneconomic fraction called tailings is deposited as a slurry in large reservoirs .The processing adds water and chemical agents to the tailings so that the original structure ofthe material therefore changes, which make storage of tailings complicated. If a tailingreservoir c ollapse s , it can damage p roperties and life downstream . In addition, tailings maycontain contaminants that disturb living organism s and contaminated groundwater in the localarea even under normal operation s . Therefore, tracing the contaminants and study ing thestability of the tailing reservoir s are important. The aim of the thesis is to investigate seepage,contaminant transport, tailings compaction and slope stability of the Zhaoli ditch tailingsreservoir (China) during its construction and afterwards. Simulations are performed with thecomputer program GeoStudio . According to the simulations and the conditions , contaminanttransport was highly related with total head. Total head boundary conditi ons have also a largeeffect on slope stability. The area that has most vertical displacement is at the middle of thetailing s reservoir , and the greatest change of vertical displacement is located near the slope,w here the vertical displacement can increa se 0.5 meter over a 1 0 30 meter distance. Theslope stability can be different from case to case, but the original designed tailing reservoirhave a good safety factor, indicating that the slope is not going to collapse easily. / Vi människor villutnyttja malm erna i marken för att skapa ett mer effektiv t industrisamhälleF ör att utvinna så myck et användbara metaller som möjligt tillsätts kemika lier och vattenunder anriknings processen, vilket gör att deponering av de vattenmättade restprodukt erna isandmagasin blir en utmaning med avseende på dammstabilitet och föroreningstransport.Eftersomdet är svårt att ändra på en färdig byggd damm för anrikningssand e n använder dettaexamensarbete av Geostudio för att simulera hur olika parameter påverkaföroreningstransport i dammen, vattenläckage från dammen samt da mmens stabilitet ochsäkerhet. Projektet har simulerat förhållanden i Zhaoli ditch damm i Kina .Simulering i GeoStudio visar att förorening sspridning är stark kopplad till den totalahydrauliska potentialen och materialets hydrauliska konduktivitet. Rand villkoren medavseende på den hydrauliska potentialen utanför dammen även har en stor inverkan pådammvallens stabilitet. De största vertikala sättningar sker i mitten av dammen, och denstörste sättningsgradient finns i dammvallens sluttning, där en vertikal sättning på 0.5 meteröver ett avstånd på 10 3 0 meter beräknas. Deformation är störst på första lagret överberggrunden. Simuleringarna visar att dammvallens sluttning är stab il med en tillräcklig högsäkerhetsfaktor.
12

[pt] A PERSONALIDADE JURÍDICA CORPORATIVA E O FETICHISMO DO CAPITAL: UMA ANÁLISE TEÓRICA BASEADA NO DESASTRE DE MARIANA / [en] CORPORATE LEGAL PERSONHOOD AND THE CAPITAL FETISHISM: A THEORETICAL ANALYSIS TRIGGERED BY THE MARIANA MINING DISASTER / [de] RECHTSPERSONLICHKEIT DES UNTERNEHMENS UND KAPITALFETISCHISMUS: EINE THEORETISCHE ANALYSE AUSGEHEND VON DER TRAGODIE VON MARIANA

GABRIEL VICENTE RIVA 15 August 2022 (has links)
[pt] Este trabalho utiliza o caso do desastre de Mariana (2015) como casogatilho para analisar a abordagem jurídica das corporações no contexto de produção econômica de falhas em barragens de rejeito. A personalidade jurídica de corporações carrega o mistério de ser similar a uma pessoa física, juridicamente, ao mesmo tempo em que completamente diferente de uma pessoa humana quando vista por fora da dimensão jurídica. Assim sendo, é analisado o conceito de personalidade jurídica corporativa conforme as teorias hegemônicas do direito, revelando suas insuficiências para abordar o caso do desastre de Mariana. Em seguida, são a avaliadas alternativas teóricas nos estudos de Evguieni Pachukanis e alguns autores que fazem referência aos seus conceitos. Os limites e potencialidades identificados na construção teórica pachukaniana conduzem à elaboração preliminar do conceito de personalidade jurídica corporativa e suas dinâmicas internas em dois passos. Primeiro, revisitando as teorias do fetichismo do capital e da forma-valor, que levam à uma melhor compreensão de formas mais desenvolvidas e fetichizadas como no caso do capital portador de juros, bem como o papel das transações jurídicas no circuito do capital. Segundo, revisitando a construção histórica da forma corporativa e dos seus atributos legais nos Estados Unidos da América e Reino Unido. Finalmente, são propostas algumas características e dinâmicas para interpretação da personalidade jurídica corporativa, considerando as variáveis descritas na análise prévia do desastre de Mariana. / [en] This work uses the Mariana mining disaster (2015) as a trigger case to analyze how corporations are legally perceived in the context of disasters, specifically, tailings dam failures. The legal personality of corporations carries the mystery of being similar to a natural person judicially at the same time that are completely different from a human person when analyzed outside of the legal realm. Under that puzzle, the corporate legal personality nature was analyzed before the hegemonic theories of Brazilian legal scholars, revealing their insufficiencies to approach the Mariana Mining Disaster. Subsequently, an alternative approach is assessed through the studies of Evguieni Pashukanis and some recent authors that endorse his main ideas. Pashukanis reveals potentialities and limits that led to a proper elaboration of the corporate legal personhood concept and its internal dynamics in two steps. Firstly, revisiting the capital fetishism and the value-form theories, which led to a better understanding of the most developed and fetishized forms of capital, the interest bearing capital, as well as the contradictory developments between the capital and productive circuits. Secondly, revisiting the historic construction of the corporate form and its legal features in both USA and United Kingdom, in order to perceive the ascension of the corporate legal personality concept. Finally, some the corporate legal personhood concept characteristics and dynamics are proposed. / [de] Diese Dissertation nimmt den Fall der Tragodie von Mariana (2015) als Ausgangspunkt, um zu analysieren, wie Unternehmen im Zusammenhang von Naturkatastrophen – insbesondere von Dammbrüchen – rechtlich wahrgenommen werden. Unternehmen als juristische Personen tragen ein Geheimnis in sich: Einerseits sind sie rechtlich gesehen den natürlichen Personen ahnlich, andererseits sind sie aber auberhalb des rechtlichen Raums ganz anders als menschliche Personen. Zunachst wird der von den vorherrschenden Rechtstheorien vertretene Begriff der Rechtspersonlichkeit des Unternehmens herausgearbeitet und dessen Unzugänglichkeiten bei der Analyse der Tragodie von Mariana werden aufgezeigt. Anschliebend wird der alternative Ansatz von Evguieni Pashukanis und seinen Nachfolgern analysiert. Die bei Pashukanis identifizierten Grenzen und Potenziale fuhren zu der Formulierung eines neuen Begriffs der Rechtspersonlichkeit des Unternehmens und deren internen Dynamiken, und zwar in zwei Schritten. Erstens werden die Konzeption des Kapitalfetischismus und die der Wertform wieder aufgegriffen, was zu einem besseren Verstandnis der entwickeltesten und fetischisiertesten Auspragungen des Phänomens führt, namlich des Falles des verzinslichen Kapitals sowie der Rolle juristischer Transaktionen im Kapitalkreislauf. Zweitens wird die historische Konstruktion der Unternehmensform und deren rechtlichen Eigenschaften sowohl in den USA als auch in Grobbritannien rekonstruiert. Zum Schluss werden einige Merkmale und Dynamiken zur Deutung der Rechtspersonlichkeit des Unternehmens vorgeschlagen, wobei die Variablen berücksichtigt werden, die in der vorherigen Analyse der Tragodie von Mariana beschrieben wurden.

Page generated in 0.0682 seconds