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  • 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.
161

An Investigation of Lithium Distribution in Certain Precambrian Iron Formations

Goodale, Douglas H. 05 1900 (has links)
<p> Precambrian iron formations from N.W. Ontario and Melville Peninsula, District of Franklin, were analyzed for Li and major elements. The N.W. Ontario samples contain little Li (0.46 to 5.88 ppm) but high percentages of mafic silicates (20 to 50%). The Melville Peninsula samples show the opposite, having higher Li (1.65 to 58.2 ppm) and lower silicate material (0.6 to 25.0%).</p> <p> Results from acetic acid leaching experiments show that part of the Li in the Melville irons may be removed, indicating Li to be present both by absorption and substitution.</p> <p> The higher Li abundances in the Melville Peninsula rocks may be attributed to the effect of later intrusive granites.</p> / Thesis / Bachelor of Science (BSc)
162

Summative Evaluation of Educational Television Material

Stupard, J D C 26 September 2023 (has links) (PDF)
The following dissertation " Summative Evaluation of Educational Television Material " consists of the following sections: Section I: Chapter 1: Introduction to the problem/task. A brief introduction to the problems of evaluation and research into educational television, with particular reference to the situation in South Africa. A background to the actual evaluation performed is included. Chapter 2: A detailed account of the planning, design, and implementation of a summative evaluation of ETV material. This section is based largely on extracts and recommendations from the available literature, as well as including recommendations and observations by the author. Section II: Chapter 3: A summary of the summative evaluation of Episode 1 and Episode 4 of the SABC ETV series "Statistics". The two episodes are compared under various criteria, particularly the degree to which the goals of the series were attained. This chapter may be taken as an example of a typical summative evaluation. Section III: Chapter 4: A detailed summative evaluation of Episode 1. Chapter 5: A detailed summative evaluation of Episode 4. j Chapter 6: A comparison, summary and recommendations arising out of the evaluations above. Appendix 1: The test instruments used in the evaluation. Appendix 2: A comprehensive abstracts. (A result ERIC databank). Not in the dissertation. list of references and of a literature search on the all the references were used Bibliography: A list of source material used by the author in the dissertation.
163

Stiffness Factors in Material Efficiency for Automotive Application

Ng, Wei Loong 04 August 2001 (has links)
The automotive industry is moving towards a new generation of lightweight vehicles for improved fuel economy and reduced pollution. However, the industry wants to keep the vehicle size without sacrificing performance, affordability, and safety. Hence, every component which makes up an automobile, from body structure to engine and interior, are scrutinized in pursue of weight savings. Efficient geometrical design and careful material utilization are ways to bring about a significant weight reduction in the auto body. This research will show techniques to predict areas in auto body that potentially have weight savings possibility. A formula is developed to determine the relevancy of substituting steel, the material used primarily in auto body, with aluminum for the equivalent structural stiffness from weight savings standpoint. Also, the same formula can provide geometrical guideline for an efficient body structure. Finite Element Modeling software ALGOR is employed in this research to determine the maximum deflection of an auto floor pan, before and after geometrical and material alteration.
164

Staged Evolution

Borowiec, Gabriela Anna 19 May 2022 (has links)
Architecture has the power to reveal the complexities of man in nature through the degree of control in the process of form making. This process offers the opportunity to create different physical and psychological experiences dependent on its articulation. This is a study that explores the introduction of chance into the making process. Through a series of model studies, I explored how basic platonic solids, more specifically cube define spatial boundaries and how asymmetrical space could challenge its regularity and symmetry. Through chemical reactions randomized organic cavities were achieved that exposed contrast between regular exterior form and irregular interior form. This visual accent is embedded in irregular forms and is unrepeatable. The act of making exposes the intricate patterns created that replicate nature and the manifestation of material decay. With this in mind, as part of my thesis, I would like to apply the above discoveries into an observation tower. The orthogonal prisms, once deconstructed, draw attention to newly generated cavities and decay, revealing different conditions throughout from where visitors can enjoy views of Mallacoota's landscape. / Master of Architecture / Nature offers diverse design elements that architects can tap into to enhance human habitation. Building materials play a vital role in shaping visual and structural design in the built environment. Through the act of making, the process revealed the question of aesthetics in architecture through intricate forms and how architectural principles of spatial qualities interplay in creating inhabitable environments. As a part of the climate change investigation, I explored different production methodologies for visualizing the climatic crisis. This research investigates the nature of irregularity resulting from the subtraction of a platonic form. The deterioration process questions whether existing climatic changes are caused by nature or result from man-made actions. Intricate openings captured within defined geometrical boundaries trace the absence of the dissolved material, revealing that components introduced and their chemical reactions can build forms for people to inhabit. By leveraging the site and model studies, the proposed program addresses the local context, climate predictions, and scale and explores architecture performance in varying global warming conditions in the form of the observation tower.
165

Nietzsche's Notes, Nietzsche's Philosophy

Rogers, Zane Paul 12 November 2001 (has links)
Disagreement on what kind of philosopher Nietzsche was (e.g., the first postmodern or a traditional) stems, in part, from what weight his unpublished writings are given in various interpretations of his philosophy. I argue that the unpublished material can sometimes assist in interpreting passages from Nietzsche's published work, but that it should not be given equal interpretive status as books Nietzsche himself authorized for publication. Since this issue alone is not decisive for understanding what kind of philosopher Nietzsche was (contra current debates which reduce the ambiguity to this issue), I characterize three genres of Nietzsche scholarship, and argue that contemporary analytical accounts are best understood as appropriations of things Nietzsche said for solving current philosophical problems, rather than accurate representations of what Nietzsche himself was up to. This leads me to conclude that, probably, Nietzsche was the father of a whole new kind of philosophizing that finds later expression in such thinkers as Heidegger, Foucault, Derrida, Rorty, and recent literary theory. / Master of Arts
166

Toward Liquid Emerald: A Cultural Center for the Japanese Tea

Hall, Desmond Levon 24 March 2003 (has links)
What are the layers of interaction between building and user? Weight? Time? Material? Space? How do these four elements affect the perception of an architectural figure? / Master of Architecture
167

Rose Windows: A Bridge Between Heaven And Earth

Gaiko, Jennifer Lynn 23 June 2017 (has links)
The rose window is a bridge between heaven and earth, a spiritual encounter, and an expression from within to allow the love of joy. Ornament and beauty are the adoration of light. Layers of composition and layers of light allow form to follow feeling through the structural repetition and thought of light as a material itself. / Master of Architecture
168

The Theoretical Usefulness of Pluralistic Constitution Theory

Davies, Morgan Edward 31 May 2017 (has links)
In this paper, I argue that pluralism about material constitution (i.e., holding that the relata of constitution can be non-identical) is a theoretically useful notion. First, I propose a principle whose denial is sufficient and, to my knowledge, necessary for pluralism to be true. Then I formulate three metaphysical antinomies (the problem of material constitution, the problem of change, and the problem of many) in such a way as to reveal that the previous principle is involved in all three. Then I show that the denial of the principle resolves all three of these problems. Finally, I conclude that pluralism is indeed theoretically useful on the basis of the following three points: 1) denying the mentioned principle is sufficient for pluralism to be correct, 2) denying the principle resolves three problems, and 3) by a theoretically useful notion I mean that if it were true it would solve multiple problems. / Master of Arts
169

Watson's Hotel: Celebrating the cast iron frame

Shah, Nishant Mayur 04 March 2008 (has links)
It is in human nature to preserve things and objects from the past, study, enjoy and cherish our history. This need to learn from and cherish the objects from the past has resulted in the development and evolution of spaces such as museums where people can come and see these objects, either to know or learn something or out of personal interest and curiosity. Somewhere in all this, is architecture from the past taken for granted? A lot of the prominent historic buildings have been well preserved and are known to people. But at the same time there are numerous historic structures, story tellers from the past, being ignored and even trampled upon. Should we not look at these also as valuable objects that have to say so much about our social, cultural and technological past? Do they need a museum space as well? Can architecture be housed and preserved in a museum? Or maybe become a museum, displaying itself, allowing people to experience it from outside and within. Watson's Hotel is one such historical building that lies today unnoticed, uncared for, decaying and falling apart. My thesis is an intervention into this urban situation. The goal of the design has not been just preservation but rather an elevation or celebration of the structure, bringing forth its true nature that lies in its structural framework, a cast iron grid of columns and beams. It aims to highlight this essential core of the building by revealing the grid in different spatial conditions. There is also a constant wish to tie the structure back to its surroundings, to bring back the dialogue that the building shared with its surroundings in the past. The structural framework is revealed and experienced in different spatial conditions achieved with the help of geometry, light and material, surfaces added in and around it, and the grid runs through all these elements bold, undisturbed and uninterrupted. / Master of Architecture
170

Cirkulär materialhantering för minskad klimatpåverkan inom byggbranschen / Circular material handling for reduced climate impact in the construction sector

Erlandsson, Lisa, Landström, Inez January 2019 (has links)
Återvinning av olika varor i dagens samhälle är viktigt för att uppnå minskad miljöpåverkan. Genom att minska uttaget av jungfruligt material och istället använda återvunnet material kan en positiv klimatpåverkan erhållas. Att eliminera linjära materialflöden till fördel för cirkulära flöden kan ekonomisk vinning uppfyllas via affärsmodeller inom cirkulär ekonomi. Byggsektorn står för en betydande del av miljöpåverkan och resursanvändningen, samt genererat avfall i samhället. Därmed finns stora möjligheter att öka cirkularitet genom bättre system för återvinning och därmed främja en mer hållbar framtid. Från NCC gavs ett uppdrag med syfte att undersöka hur stor andel återvunnet material som byggdes in i deras bostadsprojekt. Genom intervjuer med deras leverantörer undersökte denna studie hur stor andel återvunnet material som deras mest använda byggvaror bestod av. Dessa byggvaror var betong, armering, mineralull, cellplast, gips och kök. Vidare undersöktes vilka möjligheter till återvinning som fanns för respektive vara. Syftet var också att, utöver detta, finna mer miljövänliga alternativ för byggbranschen i allmänhet och i synnerhet för de produkter som i dagsläget har störst förbättringspotential. Resultatet visar att andelen återvunnet material för respektive byggvara var varierande, från 0 % till 96 %. Tillsammans bidrar dessa värden till en total andel för NCC’s bostadsprojekt på 8,5 %. Kunskapen och möjligheten till att öka andelen återvunna material som byggvarorna innehåller finns hos leverantörerna. En faktor till detta var att andrahandsvärdet varierade stort samt att det saknas ekonomiska incitament för att sortera byggavfallet. Slutsatsen är därför att det krävs en ökad kostnad för att ta ut jungfruligt material i kombination med att det måste kosta mer att deponera. Med andra ord, förbrukat material ska inte ses som avfall utan som en resurs för att cirkulär ekonomi ska kunna förverkligas i samhället och därmed bidra till positiv miljöpåverkan och förbättrad resurshushållning. Utbildning, samarbete och personligt engagemang är faktorer som krävs för att denna samhällsomställning ska kunna ske. / Recycling of waste is important for the environment in today ́s society. Through less use of new raw material and increased use of recycled material, the climate change can be battled. To eliminate linear flow of material in favour of circular is a part of circular economy. The construction industry contributes to a significant part of both the energy consumption and the amount of waste, and therefore has great opportunities to recycle NCC wants to know how much recycled material they used in their housing projects. Through interviews with their suppliers, this study investigates how much recycled material some of their most used building goods (for example concrete, reinforcement and isolation) contained. Further, the opportunities for recycling of the different types of building goods were analysed. The purpose was also to find more eco-friendly alternatives to the construction industry in general and in particular to the goods which had the largest potential of improvement. The result showed that the proportion of recycled material varied and the total proportion for NCC’s housing projects was low. The knowledge and the opportunities to increase the proportion is known by the suppliers but the majority of the building goods consists a general low proportion. One factor was that the second hand value was varied. Another was that there were no incentive for recycling, which leads to a lack of motivation at the worksite. The conclusion is therefore that waste should be seen as a resource in order to implement circular economy to a greater extent and to contribute to the climate in a positive way. Education, collaboration and personal engagement is factors which is needed to fulfil this adaptation of the society.

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