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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.
351

Simulation methods for the mechanical nonlinearity in MEMS gyroscopes

Putnik, Martin 16 September 2019 (has links)
Im Zuge der Miniaturisierung werden mechanische Nichtlinearitäten immer wichtiger für die Auslegung und Optimierung von mikromechanischen Drehratensensoren. Die vorliegende Arbeit beschäftigt sich mit neuen Simulationsmethoden zur Beschreibung dieser mechanischen Nichtlinearitäten. Die Methoden werden mit Benchmark-Simulationen und Messergebnissen validiert. Die Genauigkeit der neuen Simulationsmethoden erlaubt den Einsatz in der Designoptimierung von kommerziellen MEMS Drehratensensoren. / In this thesis, new simulation methods for the mechanical nonlinearities in microelectromechanical gyroscopes are developed and validated with benchmark simulations and experimental results. The benchmark simulations use transient finite element analysis that consider geometric nonlinear effects. Experimental results are from Laser Doppler Vibrometry and electrical measurements on wafer level. Two different simulation methods, the energy- and stiffness-based approach, are compared with respect to numerical performance and accuracy. In order to evaluate these methods, four different mechanical structures are taken into account: a doubly-clamped beam, a gyroscope test structure and two state-of-the-art gyroscopes with 1 and 2 axes. For the accuracy measurement, the simulated frequency shifts of modes are compared to the true frequency shifts that are developed from either benchmark simulation, Laser Doppler Vibrometry or electrical measurement. The presented methods allow to predict the frequency shift of modes accurately and with a minimum of computational cost. Furthermore, the methodologies allow to generate modal reduced order models which are compatible with common model order reduction in the field. This makes it possible to incorporate mechanical nonlinearity in already established reduced order models of gyroscopes. The simulation and modeling strategies are applicable for generic actuated structures that can be also in different fields of study such as the aerospace and earthquake engineering.
352

Respektfull design: För ökad förståelse och vilja att förändra : FUCK ME, en utställning om den svåra sjukdomen ME/CFS / Respectful design: For increased understanding and willingness to change : FUCK ME, an exhibition on the severe disease ME/CFS

Sandberg, Emma January 2020 (has links)
In this essay, I go through the different parts that compile my degree project. I have explored the power of graphic design for educational purposes. During my process, I have found a new area of graphic design, respectful design. Something that can be briefly described as design created with the greatest reverence for conveying a difficult subject without diminishing the affected person behind. An approach where one works closely with the involved and frequently checks in, so that nothing is portrayed incorrectly. This along with the constant search for information makes up the basics of respectful design. The disease ME has finally begun to be talked about in society. But the way the disease is portrayed can be argued as incorrect in relation to the bigger picture. As a graphic designer I have analyzed the problem and worked out a possible solution. My conclusion is that strong colors mixed with melancholy and straightforward information can make the subject less heavy and easier to handle. This can open the senses to problem solving and understanding instead of stopping at pity. The aim of the project has been to get away from these dark quilts that the media has placed on us. The goal was to create something that does not hide the awfulness of the disease but informs in a more fun and more inviting way. I strongly believe that graphic design can reduce the social stigma around a topic if done properly. When life is the toughest it has helped me and (after the response of the exhibition) others to learn more about our disease. Above all, if more people know more about the disease, ME- patients will get help. Hopefully society will open it’s arms so that no more people are forced to choose suicide. / I denna uppsats går jag igenom de olika delarna som sammanställer mitt examensprojekt. Jag har i grunden utforskat kraften av grafisk design i utbildningssyfte. Under min process har jag kommit fram till ett nytt område inom grafisk design, respektfull design. Detta går kort att beskriva som design utformat med största vördnad inför att förmedla ett svårt ämne utan att förminska den drabbade människan bakom. Respektfull design innebär att man jobbar nära med inblandade, kollar av hela tiden så att inget porträtteras felaktigt och läser på om ämnet så långt det går. Sjukdomen ME har äntligen börjat talas om i samhället. Men sättet sjukdomen porträtteras kan argumenteras som svartvitt och felaktigt gentemot helhetsbilden. Som grafisk designer har jag analyserat problemet och jobbat fram en möjlig lösning. Min slutsats är att starka färger blandat med melankolisk och rak information kan göra ämnet mindre tungt och mer lätthanterligt. Detta kan öppna sinnena för problemlösning och förståelse istället för att stanna vid medlidande. Syftet med projektet har varit att komma ifrån detta mörk täcke som media lagt över oss. Målet var att skapa något som inte döljer det hemska med sjukdomen men informerar på ett roligare och mer inbjudande sätt. Jag tror stark på att grafisk design kan minska det sociala stigmat runt ett ämne om det görs på rätt sätt. När livet är som tuffast har det hjälpt mig och (efter respons av utställningen) också andra med att utbilda och läsa på. Framför allt om fler vet mer om sjukdomen kommer det att gå att få bättre hjälp. Förhoppningvis öppnar samhället sina armar så att inte fler tvingas till att välja självmord.
353

Way of the Butterfly: A Journey towards Transformation through Self-portraits In-Between

Koshikawa, Masami 01 January 2015 (has links)
It has not been easy for me to talk about myself or describe my feelings or thoughts. Coming from Japan, a collective society, we typically are not raised to do so. Throughout the MFA program at UCF, I have shared my feelings and thoughts through my work. It is important to discuss and inform others of our cultural similarities and differences so that we may gain a better understanding of each other. This process has helped me grow not only on an artistic level, but also on a personal level. My journey towards integration has led me to a meaningful studio practice, which has allowed my work to bridge the gap between Western and Eastern artistic sensibilities. At the beginning of the MFA program, my mother sent many boxes of origami from Japan. As I started incorporating my mother’s origami into my work, I found myself identifying with the origami butterfly. My realization is that the person I am now is not the person I was when I began this journey. My wish for you, the reader, is to go along with me as I tell you the story of my transformation.
354

Through the Eyes of Shamans: Childhood and the Construction of Identity in Rosario Castellanos' "Balun-Canan" and Rudolfo Anaya's "Bless Me, Ultima"

Nava, Tomas Hidalgo 09 July 2004 (has links) (PDF)
This study offers a comparative analysis of Rosario Castellanos' Balún-Canán and Rudolfo Anaya's Bless Me, Ultima, novels that provide examples on how children construct their identity in hybrid communities in southeastern Mexico and the U.S. southwest. The protagonists grow and develop in a context where they need to build bridges between their European and Amerindian roots in the middle of external influences that complicate the construction of a new mestizo consciousness. In order to attain that consciousness and free themselves from their divided selves, these children receive the aid of an indigenous mentor who teaches them how to establish a dialogue with their past, nature, and their social reality. The protagonists undertake that negotiation by transgressing the rituals of a society immersed in colonial dual thinking. They also create mechanisms to re-interpret their past and tradition in order to create an image of themselves that is not imposed by the status quo. In both novels, the protagonists have to undergo similar processes to overcome their identity crises, including transculturation, the creation of sites of memory, and a transition from orality to writing. Each of them resorts to creative writing and becomes a sort of shaman who pulls together the "spirits" from the past, selects them, and organizes them in a narration of childhood that is undertaken from adulthood. The results of this enterprise are completely different in the cases of both protagonists because the historical and social contexts vary. The boy in Bless Me, Ultima can harmoniously gather the elements to construct his identity, while the girl in Balún-Canán fails because of the pressures of a male-centered and highly racist society.
355

Paul Verhoeven, media manipulation, and hyper-reality

Malchiodi, Emmanuel William 01 May 2011 (has links)
Does the individual really matter in the post-modern world, brimming with countless signs and signifiers? My main objective in this writing is to demonstrate how this happens in Verhoeven's films, exploring his central themes and subtext and doing what science fiction does: hold a mirror up to the contemporary world and critique it, asking whether our species' current trajectory is beneficial or hazardous.; Dutch director Paul Verhoeven is a polarizing figure. Although many of his American made films have received considerable praise and financial success, he has been lambasted on countless occasions for his gratuitous use of sex, violence, and contentious symbolism--1995s Showgirls was overwhelmingly dubbed the worst film of all time and 1997s Starship Troopers earned him a reputation as a fascist. Regardless of the controversy surrounding him, his science fiction films are a move beyond the conventions of the big blockbuster science fiction films of the 1980s (E.T. and the Star Wars trilogy are prime examples), revealing a deeper exploration of both sociopolitical issues and the human condition. Much like the novels of Philip K. Dick (and Verhoeven's 1990 film Total Recall--an adaptation of a Dick short story), Verhoeven's science fiction work explores worlds where paranoia is a constant and determining whether an individual maintains any liberty is regularly questionable. In this thesis I am basically exploring issues regarding power. Although I barely bring up the term power in it, I feel it is central. Power is an ambiguous term; are we discussing physical power, state power, objective power, subjective power, or any of the other possible manifestations of the word? The original Anglo-French version of power means "to be able," asking whether it is possible for one to do something. In relation to Verhoeven's science fiction work each demonstrates the limitations placed upon an individual's autonomy, asking are the protagonists capable of independent agency or rather just environmental constructs reflecting the myriad influences surrounding them.
356

Vztahy mezi staroseverskými adjektivními výpůjčkami a jejich staroanglickými protějšky ve střední angličtině / Relationships between Old Norse adjectival borrowings and their Old English counterparts in Middle English

Müllerová, Světlana January 2020 (has links)
CHARLES UNIVERSITY - FACULTY OF ARTS DEPARTMENT OF ENGLISH LANGUAGE AND ELT METHODOLOGY Relationships between the borrowed Old Norse adjectives in English and their Old English counterparts MA THESIS Supervisor: prof. PhDr. Jan Čermák, CSc. Author: Světlana Müllerová Abstract: The aim of this MA thesis is to examine the relationship between six word pairs, each comprising an Old Norse adjectival borrowing in Middle English and its Old English counterpart along with its Middle English reflex for further reference. The inquiry into their relationship involves an analysis of: their (i) formal aspects, (ii) syntactic properties, (iii) semantic fields and (iv) external factors possibly contributing to their obsolescence or survival, such as the restriction to certain text types or geographic localization, as suggested by the individual linguistic profiles in the Linguistic Atlas of Early Middle English and Linguistic Atlas of Late Mediaeval English. The description of individual semantic fields of the given words is based on their semantic classification within the Historical Thesaurus of English. This analysis is based on the occurrences of the individual words as taken from the dictionaries Middle English Dictionary and Dictionary of Old English, and related corpora Dictionary of Old English Corpus and...
357

UTILIZATION OF WIND POWER IN RWANDA : Design and Production Option

Eric, MANIRAGUHA January 2013 (has links)
This Master Thesis is the research done in the country of Rwanda. The project leads to study the climate of this country in order to establish whether this climate could be used to produce energy from air and to implement the first wind turbine for serving the nation.   After an introduction about the historical background of wind power, the thesis work deals with assessment of wind energy potential of Rwanda in focusing of the most suitable place for wind power plants. The best location with annual mean wind speed, the rate of use of turbine with hub height for an annual production per year, the mean wind speeds for 6 sites of Rwanda based on ECMWF for climatic data for one year at relief of altitude of 100m and coordinates are reported too.   The result of energy produced and calculations were done based on power hitting wind turbine generator in order to calculate Kinetic energy and power available at the best location to the measurement over the period of 12 months, that could be hoped for long term.   With help of logarithmic law, where wind speed usually increases with increasing in elevation and the desired wind speeds at all 6 sites were used. The annual energy production was taken into account at the best site with desired wind speed at the initial cost of turbine as well as the cost of energy (COE).However, with comparison of the tariff of EWSA, the price of Wind designed in this Research per kWh is cheaper and suitable for people of Rwanda. / <p><em>Rwanda has considerable opportunities development energy from hydro sources, methane gas, solar and peat deposits. Most of these energy sources have not been fully exploited, such as solar, wind and geothermal. As such wood is still being the major source of energy for 94 per cent of the population and imported petroleum products consume more than 40 per cent of foreign exchange. Energy is a key component of the Rwandan economy. It is thus recognized that the current inadequate and expensive energy supply constitutes a limiting factor to sustainable development. Rwanda’s Vision 2020 emphasizes the need for economic growth, private investment and economic transformation supported by a reliable and affordable energy supply as a key factor for the development process. To achieve this transformation, the country will need to increase energy production and diversify into alternative energy sources. Rwandan nations don’t have small-scale solar, wind, and geothermal devices in operation providing energy to urban and rural areas. These types of energy production are especially useful in remote locations because of the excessive cost of transporting electricity from large-scale power plants. The application of renewable energy technology has the potential to alleviate many of the problems that face the people of Rwanda every day, especially if done so in a sustainable manner that prioritizes human rights.</em></p>
358

Implementación de un controlador difuso de temperatura prototipo usando la inferencia difusa de Takagi Sugeno

Huamán Bustamante, Jesús Omar January 2007 (has links)
No description available.
359

Automatic classification of cardiovascular age of healthy people by dynamical patterns of the heart rhythm

kurian pullolickal, priya January 2022 (has links)
No description available.

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