3 resultados para tungsten ore

em Dalarna University College Electronic Archive


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The purpose of this essay is to examine and explain how the Swedish mining court of Stora Kopparberget (the Great Copper Mountain) implemented its judicial legislation between 1641-1682. Questions are asked about which counts of indictments the court tried, which sentences they handed out, in what quantities and how these results looks in comparison with other contemporary courts. The index cards of the court judicial protocols are the primary source of information. The methods are those of quantity- and comparative analysis.The results show that theft of copper ore was the most common crime ransacked by the court. Other common crimes were (in order): sin of omission, transgression of work directions, fights, slander and disdain, trade of stolen ore, failing appearance in court etc.Fines were by far the most common sentence followed by shorter imprisonments, gauntlets, loss of right to mine possession, twig beating, loss of work, penal servitude, banishment, “wooden horse riding” and finally military transcription. Even though previous re-search, in the field of Swedish specialized courts, is almost non existent evidence confirms great similarities between the Stora Kopparberget mining court and Sala mining court. This essay will, hopefully, enrich our knowledge of specialized courts, of 17th century mining industry and society and let us reach a broader understanding of the working conditions of the mountain.

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The overall purpose of this thesis and the four independent studies it builds upon is to examine how categorizations and identity positions are constructed and negotiated in the educational program Swedish for immigrants (SFI) both historically and among participants in the program at the beginning of the 21th century. The analytical focus is on the discourses that frame the development of the SFI program with a specific interest in categorizations and identity in relation to gender, language and national belonging. The empirical material includes historical texts (curricula, commission reports, public inquiries, political propositions, laws) from 1965 to 2010, as well as approximately 95 hours of audio and video recorded data and ethnographic field notes from five SFI classrooms. The results are presented primarily in the four articles but partly also in the thesis itself. Our analysis in the first study, that takes a sociohistorical perspective as a point of departure, indicates shifts in discourses with regards to the categories and aims of the educational program, thus, making certain identity positions more accessible than others at specific times. Using the approach of nexus analysis, the theoretical framework employed in the second study approaches language policies n terms of a dialectical elationship between policy and the learning that takes lace in the language focused classroom. Feminist and postcolonial frameworks re employed ore pecifically in the third and fourth studies. The historical nalysis presented in article three shows how the categories of “immigrant” and Swedes” ave been produced and negotiated in discourses on gender and gender quality in the SFI program since the early 1970s. The fourth study highlights he omplex relationship between gender equality and integration policies, as well as he perception of gender equality as a central part of Swedishness”, negotiated in he everyday conversations in the SFI classroom. Overall, the results illuminate he circulation of discourses both cross ime and between policy and classrooms. oreover, it contributes to a critical discussion about the intersection of language, ender and national elonging in the negotiation of boundaries between insiders and outsiders in Swedish society.

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This dissertation is focused on theoretical and experimental studies of optical properties of materials and multilayer structures composing liquid crystal displays (LCDs) and electrochromic (EC) devices. By applying spectroscopic ellipsometry, we have determined the optical constants of thin films of electrochromic tungsten oxide (WOx) and nickel oxide (NiOy), the films’ thickness and roughness. These films, which were obtained at spattering conditions possess high transmittance that is important for achieving good visibility and high contrast in an EC device. Another application of the general spectroscopic ellipsometry relates to the study of a photo-alignment layer of a mixture of azo-dyes SD-1 and SDA-2. We have found the optical constants of this mixture before and after illuminating it by polarized UV light. The results obtained confirm the diffusion model to explain the formation of the photo-induced order in azo-dye films. We have developed new techniques for fast characterization of twisted nematic LC cells in transmissive and reflective modes. Our techniques are based on the characteristics functions that we have introduced for determination of parameters of non-uniform birefringent media. These characteristic functions are found by simple procedures and can be utilised for simultaneous determination of retardation, its wavelength dispersion, and twist angle, as well as for solving associated optimization problems. Cholesteric LCD that possesses some unique properties, such as bistability and good selective scattering, however, has a disadvantage – relatively high driving voltage (tens of volts). The way we propose to reduce the driving voltage consists of applying a stack of thin (~1µm) LC layers. We have studied the ability of a layer of a surface stabilized ferroelectric liquid crystal coupled with several retardation plates for birefringent color generation. We have demonstrated that in order to accomplish good color characteristics and high brightness of the display, one or two retardation plates are sufficient.