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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.
201

Výpočet zatížení, analýza pevnosti a simulace nárazu ptáka pro kompozitní náběžné hrany křídla / Loads calculation, stress analysis and bird strike simulation of a composite wing leading edge

Zubrytski, Raman January 2015 (has links)
Tato diplomová práce se zaměřuje na stanovení geometrických a materiálových parametrů konstrukce slotu letadla B737-200. V této práci je vypracovaný návrh kompozitového slotu s ohledem na dané zatěžovací případy, včetně tzv. “bird strike”. Analytické výpočty jsou ověřené metodou konečných prvků (MKP) v programech MSC.Nastran/Patran, MSC.Dytran
202

The Industrial Workers of the World and the Oregon Packing Company Strike of July 1913

Hodges, Adam J. 09 July 1996 (has links)
This study builds upon the notion of a Wobbly 'sensibility' established by Salvatore Salemo and relates it to John Townsend's analysis of conflict between that group's adherents and western Progressives. The latter scholar, by concentrating on middle-class economic anxiety, failed to deal with the virtual unanimity of opposition to the IWW in western towns. Salerno's assertion that a 'sensibility' within the IWW was more binding than ideology raises the possibility that individuals and organizations of varying beliefs could be similarly united within a single cultural sphere with a directed purpose. Such an analysis can apply to factions of Progressivism and radical labor alike. The first chapter begins with a brief account of the historical context, origins, and organizational history of the IWW. This second section discusses the internal dynamic of the IWW, particularly the relationship between the leadership and rank-and-file. The third section briefly explicates the purpose of the thesis. The second chapter recounts important episodes of IWW activity that occurred on the West Coast concurrently with the strike in order to set the regional context of the conflict. The third chapter begins with a section discussing the development of Progressivism and urbanization in a national context and emphasizes cultural conflict. The second section is a brief survey of Progressive era Portland, Oregon. The third and fourth sections discuss the cultural repercussions of women entering industrial life on a mass scale. The chapter concludes with a brief demographic survey of cannery women. The fourth chapter is a chronological narrative of the strike, and is followed by a concluding fifth chapter of analysis. The first section suggests a Progressive 'sensibility' arrayed specifically against radical labor, while the next section discusses a radical 'sensibility' hostile to varying aspects of the cultural norms of Progressivism. The final section asserts the importance of analysis of cultural values, above even notions of class, in addition to economic analysis in order to obtain a more useful synthesis of Wobbly conflict than now exists.
203

Social interaktion inom e-sport : En kvalitativ studie av social interaktion inom e-sport / Social interaction in e-sports : A qualitative study of social interaction in e-sports

Söderström, Herman January 2020 (has links)
Syftet med studien var att belysa den sociala interaktionen inom e-sport. Detta gjordes genom att granska lagbaserad e-sport utifrån Goffmans dramaturgiska interaktionsperspektiv. En kvalitativ metod i form av intervjuer tillämpades då detta skapade förutsättningar för att få djupgående svar på syftet och de forskningsfrågor som formulerats för studien. Resultatet visar att e-sport är ett sätt för människor att uppvisa sina backstage beteenden vilket gör att e-sport fungerar som ett sätt för människor att lära känna varandra. Lagsammanhanget blir viktigt inom e-sport eftersom mötet med främmande människor över internet ofta kännetecknas av ett ovänligt klimat, i synnerhet för kvinnor. Avslutningsvis kan e-sport fungera som ett verktyg för människor att utveckla personliga egenskaper även utanför spelet, men det är upp till individen att själv skapa förutsättningar för detta.
204

Fenomén stávky: analýza dynamiky pracovních konfliktů v současné Francii / Phenomenon of Strik: Analysis of the Dynamics of Industrial Conflicts in Contemporary France

Sabová, Katarína January 2014 (has links)
This thesis aims to outline the different dynamics of strike activity and thus understand the basic principles of industrial conflicts in France in the 90s of the 20th century and the first decade of the 21st century. To study this problem we decided to use a dual approach. A quantitative one, which helped us to critically evaluate the statistical resources of the Ministry of Labour and to made first assumptions about decline of strike activity in France. We used as well qualitative approach in order to understand the use of strikes in various conflict situations. We tried, based on several practical examples of protests, to identify the factors and mechanisms explaining the constraints that may prevent representatives of trade unions use strikes as mobilization agents. Last but not least, our study is realized in the context of the ongoing debate in the French academic environment regarding the conversion of the repertoire of collective action. Unlike works that try to apprehend this transformation giving emphasis on the "new" forms of protest, our goal was to answer questions leading to an understanding of the conditions of continuation of the strike as a traditional way of collective struggle.
205

Důvody nuceného krmení vězňů na Guantánamu v kontextu Foucaultovy teorie moci / The reasons for force feeding prisoners at Guantanamo in the context of Foucault's theory of Power

Polák, Michal January 2014 (has links)
Aim of this paper is to explain used forced feeding of hunger strikers at the U.S. Prison at Guantanamo, when this technique is prohibited in international law. I used the sociology of Michel Foucault, who devoted himself to the topic of imprisonment. His work is often used in the interpretation of what is happening at Guantanamo. With the help of these interpretations were generated two hypotheses. I tested compiled hypotheses in study of literature including news articles, research papers, reports of human rights organizations, legislation, interviews with former camp detainees or camp staff etc. We conclude that the prisoners at Guantanamo are not fed to be kept alive, but rather to be punished for a hunger strike protest. The conclusions highlight a new form of relationship between state and its citizens, which calls for more comprehensive analysis of current form of government, which we are not able to cover in this work.
206

Localizing interseismic deformation around locked strike-slip faults

Zhu, Yijie 28 August 2020 (has links)
Localized geodetic deformation of an approximately arctangent shape around locked strike-slip faults is widely reported, but there are also important exceptions showing distributed interseismic deformation. Understanding the controlling mechanism is important to the interpretation of geodetic observations for hazard assessment and geodynamic analysis. In this thesis, I use simple finite element models to separately study the two major contributors to the deformation: far-field loading and previous earthquakes. The models feature a vertical strike-slip fault in an elastic layer overlying a viscoelastic substrate of Maxwell or Burgers rheology, with or without weaknesses representing extensions of the fault either along strike or to greater depth. If the locked fault is loaded only from the far field without the effects of previous earthquakes, localized deformation occurs only if local mechanical weaknesses below the fault and/or somewhere along strike are introduced. I first show that the effects of far-field loading are rather limited even in the presence of extreme weaknesses. Then I use idealized earthquake cycle models to investigate the effects of past seismic events in a viscoelastic Earth. I demonstrate that, after a phase of fast postseismic deformation just after the earthquake, the localization of interseismic deformation is controlled mainly by the recurrence interval of past earthquakes. Given viscosity, shorter recurrence leads to greater interseismic localization, regardless of the rheological model used. The presence of a low-viscosity deep fault zone does not change this conclusion, although it tends to lessen localization by promoting faster postseismic stress relaxation. Distributed interseismic deformation, although less reported in the literature, is a natural consequence of very long recurrence and in theory should be as common as localized deformation. The apparent propensity of the latter is likely associated with the much greater quantity and better quality of geodetic observations from higher-rate and shorter-recurrence faults. Using viscoelastic earthquake-cycle models, I also explore the role of nearby earthquakes and creeping segments along the same fault. For faults of relatively short recurrence, frequent ruptures of nearby segments, modelled using a migrating rupture sequence with or without temporal clustering, further enhance localization. For faults of very long recurrence, faster near-fault deformation induced by a recent earthquake may give a false impression of localized interseismic deformation. / Graduate
207

Development of protecting coatings for composites in an aero-engine

Mertz, Julien January 2021 (has links)
Carbon fibre reinforced polymer (CFRP) composite materials exhibit high specificstrength and stiffness therefore they can be a lightweight alternative to metalliccomponents for the front section of an aero-engine. Despite the benefit of CFRP composite materials for aero-engine applications, there arealso new challenges due to their inherent properties compared to conventionalaerospace metallic structures, such as a lower erosion resistance, poor thermalresistance, and poor electrical conductivity. In aero-engines, some components can be subjected to harsh erosive environmentsduring operation, therefore the erosion resistance of CFRP composite materials need tobe investigated. CFRP composites are not able to withstand as high temperatures astraditional metallic components and their ability to resist fire events need to beenhanced. On the other side, the poor electrical conductivity of CFRP composites canalso be critical when the aircraft is struck by lightning. Therefore, improving theconductivity of CFRP composite is of large interest. This thesis work is focusing on investigating innovative coating solutions to overcomethese three independent challenges in order to enhance CFRP composite applicationsinto the front section of an aero-engine. Coating systems for lightning strike protection have been investigated and developed.A fire protection has been identified and tested; the tests showed promising results forfire application. Furthermore, investigations on erosion resistant coatings indicated thepossible improvement of replacing the currently used erosion resistant coating by othercoatings presented in this thesis work.
208

Patterns of Mammal Incidents with U.S. Civil Aircraft

Biondi, Kristin Michele 15 December 2012 (has links)
Wildlife collisions with U.S. civil aircraft (hereafter incidents) pose safety and economic concerns. Terrestrial mammals represented only 2.3% of wildlife incidents, but 59% of these incidents caused damage to aircraft. I examined 2,558 incidents in the Federal Aviation Administration (FAA) National Wildlife Strike Database to characterize and analyze overall mammal incidents by airport type, emphasizing white-tailed deer (Odocoileus virginianus) and bat incidents with U.S. civil aircraft. Mammal incidents caused 5 times greater damage than other wildlife which varied by airport type and appeared associated with species’ behavior. I provided relative hazard scores to determine which species were most hazardous to aircraft. Relative hazard increased with increasing body mass with mule deer (O. hemionus), white-tailed deer and domestic dog (Canis lupus familiaris) most hazardous to aircraft. White-tailed deer caused 6 times greater damage than all other wildlife and are hazardous to aircraft. In contrast, bats posed a low hazard to aircraft.
209

Impacts of Mowing on Bird Abundance, Distribution, and Hazards to Aircraft at Westover Air Reserve Base, Massachusetts

Milroy, Andrew G. 01 January 2007 (has links) (PDF)
Few studies have measured the impacts of mowing on bird use of habitat and the risk of bird collisions with aircraft on North American airfields. The need for this research has increased as airfields become some of the only large contiguous grasslands available to rare migratory birds in some areas. I studied bird abundance, distribution and behaviors at Westover Air Reserve Base, Massachusetts, USA in June and July 2004. I compared my data with bird strike records to discern any patterns associated with mowing of airfield vegetation. There was no difference in total number of birds or species between mowed and unmowed plots adjacent to runways and taxiways. There were more Upland Sandpipers and Eastern Meadowlarks in mowed vegetation and more sparrows (Grasshopper and Savannah) in unmowed vegetation. From 1997 to 2005, swallows were the birds most often struck by aircraft in June and July at Westover, and were also the second most numerous birds in both mowed and unmowed plots. Bird species that pose high Bird/Wildlife Aircraft Strike Hazard (BASH) risk at Westover included Turkey Vulture, Red-tailed Hawk, Great Blue Heron, and Canada Goose. I did not observe those species in paired plots of mowed or unmowed airfield vegetation adjacent to runways and taxiways at Westover. I opportunistically observed 64 incidents where species that pose high BASH risk were in or adjacent to areas where aircraft operate. Birds struck most frequently at Westover between April 1997 and January 2005 were “swallows”, American Kestrel, Killdeer, Horned Lark, Eastern Meadowlark, and Mourning Dove. Current mowing practices at Westover may have adverse effects on Upland Sandpiper and Grasshopper Sparrow, both state-listed, rare, grassland birds, but may not measurably reduce overall risk to aircraft, given the continued presence of large, high BASH risk species. I recommend methods to reduce threats posed by high-risk species at Westover, and further research to seek ways to reduce adverse effects of mowing on state-listed, rare, migratory species of birds.
210

A Moral Reconstruction of Freedom of Association in Canada

Talarico, Andrea 26 July 2023 (has links)
In 1987, the Supreme Court of Canada rejected arguments that the freedom of association in section 2(d) of the Canadian Charter of Rights and Freedoms (hereafter, the Charter) protected a positive right to bargain collectively over working conditions. Between 1987 and 2007, the Supreme Court's jurisprudence on freedom of association was marked by certain tensions. In particular, the Court rejected arguments that freedom of association could have a collective dimension. In addition, the Court adopted a so-called negative approach to freedom of association, stating that section 2(d) of the Charter could not be used to create obligations for the state. The idea that freedom of association conferred negative (as opposed to positive) individual protection against state interference is typical of a liberal view of rights and freedoms. However, in 2007, in Health Services, the Supreme Court relied on underlying Charter values (specifically autonomy, liberty, equality, democracy and dignity) to extend constitutional protection to the right to collective bargaining. In 2015, this constitutional protection was extended to the right to strike. The use of moral values in constitutional adjudication is widespread. In Canada, Charter values are used both to interpret Charter provisions and to weigh competing rights, notably in the proportionality exercise under section 1 of the Charter. Using moral reconstruction as a methodological approach, this thesis examines the use of the values identified in Health Services throughout the Supreme Court's body of case law. From these values, the thesis develops a so-called republican reconstruction of freedom of association. While liberalism emphasises the freedom of the individual from the state, republicanism aims to ensure non-domination in both the private and public spheres. Equality, when considered from a republican perspective, becomes relational equality. Republicanism is particularly relevant to labour law, which is based on a relationship of subordination identified by republican theorists as a relationship of domination. The final chapter of the thesis explores alternative models for protecting republican freedom in the workplace.

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