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Adeyemi, Adesola Olusiji. "The dramaturgy of Femi Osofisan." Thesis, University of Leeds, 2009. http://etheses.whiterose.ac.uk/8935/.
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Okoh, Julie Omoifo. "Théâtre et société : Femi Osofisan et S.A. Zinsou : étude comparée." Bordeaux 3, 1992. http://www.theses.fr/1992BOR30042.
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Entre le theatre et la societe existent des rapports dialectiques. Et notre but dans ce travail consiste a faire un rapprochement synthetique des oeuvres de deux dramaturges africains contemporains : femi osofisan, nigerian et s. A. Zinsou, togalais. Rapprochement qui permet de deceler des analogies ou des dissemblances dans leur vision du monde a travers leur theatre. Deux visions principales semblent caracteriser leurs oeuvres : pessimisme et optimisme. Le pessimisme ressort de l' evolution des faits sociaux et de la peinture des moeurs contemporaines. D'ou une satire de moeurs et mentalite. En revanche, l'optimisme s'affiche dans leur vision de l'avenir. Face a l' etat d anomie qui domine actuellement leur societe, ils lancent un appel a leurs compatriotes afin qu' ils conjuguent leurs efforts pour la reconstruction du pays. Tandis qie osofisan propose a son public une nouvelle societe de modele socialiste, fondee sur le recours a la raison, a l' esprit scientifique et a la philosophe du travail, excluant les croyances traditionnelles, zinsou preconise le retour aux sources et la rehabilitation de la culture traditionnelle togolaiseBetween theatre and society eexist a dialectic relationship. The theatre gets its material from the society and sends back messages to the society. Our present aim is to make a comparative study of the image of the society in the plays of two african contemporary playwrights : femi osofisan, nigerian and s. A. Zinsou, togolese. Comparison that will enable us to point out the analogy and the dissimilarity in their visions and aldo in the way they try and use theatre to solve some current social issues. Their plays seem mainly caracterised by two antithetical visions : pessimim and optimism. Their evocation of social reality and their picture of contemporary norms ans conventions is couched in pesssimistic tones. On the other hand, optimism appears in their projection towards the future. They appeal to their compatriots to rally together to build their nation. Osofisan proposes a socialist system. Zinsou recommends the re-establishment of a traditional social set up
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DUARTE, C. N. B. "Processos Identitários e Saúde Reprodutiva: Estudos com Um Grupo de Doulas." Universidade Federal do Espírito Santo, 2016. http://repositorio.ufes.br/handle/10/3118.
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Previous issue date: 2016-02-22Tendo em vista a importância do apoio oferecido às mulheres pelas doulas, e sua crescente atuação no cenário mundial e brasileiro a pesquisa relatada nesta dissertação buscou investigar processos identitários de um grupo de doulas que atua em conjunto, tendo como base a Teoria da Identidade Social. Para isso foram realizados dois estudos com um grupo de cinco doulas, com nome fictício Bem Nascer, atuante em uma cidade do estado do Espírito Santo. Elas concordaram, voluntariamente, em participar desta pesquisa. Os dois estudos são apresentados em formato de artigo para apresentar os resultados e discussões de forma estruturada. O primeiro artigo apresenta os resultados obtidos através de observação participante, realizada em dez encontros mensais sobre gestação e parto, promovidos pelo grupo Bem Nascer junto a gestantes. Foi produzido um diário de campo, cujos dados são analisados a partir do método hermenêutico-dialético (Minayo, 1992). Foram identificadas três categorias: 1) Descrição dos encontros; 2) Cenas de interações com o endogrupo; 3) Cenas de interações com exogrupos. Observou-se que as doulas, nas interações com as gestantes, exerciam papeis tais como: amigas; instrutoras-esclarecedoras; profissionais; militantes feministas; e que valorizavam homens pró-parto e médicos humanizados em detrimento de homens tradicionais e médicos tecnocratas. Infere-se que essa valorização ocorre por categorização cruzada. Verificou-se que as contribuições das doulas para a saúde reprodutiva eram condizentes com diretrizes do sistema público de saúde brasileiro e que elas disseminavam ideais feministas para mulheres de classe média. O segundo artigo utiliza entrevistas individuais semiestruturadas, analisadas através da análise de conteúdo temática (Bardin, 1977), que permitiu identificar 134 temas e seis categorias. Os processos identitários das doulas estão ligados à militância feminista, ao movimento de humanização do parto, e ao pertencimento a um grupo de trabalho que constitui laços profissionais, de amizade e confiança. Há atitudes negativas quanto à maioria dos profissionais de medicina, com exceção daqueles percebidos como humanizados. Observa-se que doulas estão construindo processos identitários ligados ao feminismo; e que o ativismo, o grupo de trabalho das doulas e a promoção de encontros com mulheres grávidas constituem estratégias de mudança social, contribuindo para a transformação da assistência à saúde e das relações de gênero. Palavras-chave: cuidado pré-natal; doulas; saúde reprodutiva; atitudes; feminismo; identidade social.
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Türe, Ebru Tınaz Gülgün. "Metisiline dirençli Staphylococcus aureus (MRSA) suşlarında femA, femB ve femX genlerinin saptanması /." Isparta: SDÜ Fen Bilimleri Enstitüsü, 2007. http://tez.sdu.edu.tr/Tezler/TF01003.pdf.
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Chamberland, Alexander Alvina. ""You don't always like your sisters, but you always love them" : Trans feminine accounts of misogyny, sisterhood and difference in New York City." Thesis, Södertörns högskola, Institutionen för kultur och lärande, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-28093.
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This thesis examines six trans feminine informants in New York City's experiences of oppression, trans-misogyny, femi-negativity, racism, and classism, as well as their experiences of community support, conflicts and resistance practices through the lens of the term sisterhood and the practice of sisterhooding. Focus has also been placed on the informant's views on allyship and coalition, and their relationship to other communities, such as the trans masculine community. The research has been conducted through in-depth, semi-structured, qualitative interviews with six trans feminine activists in New York City. The informant group was heterogenous in regards to age, race/ethnicity, as well as in regards to where in the city they resided and which parts of the movement they were engaged in. My findings follow Jenny Gunnarsson Payne's (2006) theory on sisterhood as an empty signifier, as my informants had different definition's of the term and concept of sisterhood, and while all of them expressed ambivalences towards the term and concept, they also all used the term to varying degrees. Several saw advantages in using the term to describe kinship and solidarity between trans feminine people. The participating informants in the study listed several different conflicts within trans feminine movements. Many of them were generally skeptical to conflicts, especially to those related to cattiness, competition, language and terminology – sentiment's which I agree with, albeit with the addition, which some of my informant's also stressed, that certain conflict's regarding differences in oppressions related to intersectional hierarchies, may be necessary. In the concluding chapter I argue for an understanding of trans-sisterhood based both on an understanding of similarities and difference's in experience and an understanding of solidarity that prioritizes the voices, perspectives and leadership of the most marginalized. My informant's described grave street harassment, employment discrimination and experiences of desexualization from gay/queer men and hypersexualization from so-called tranny chasers. Because of the lack of previous research on trans femininities from the perspective of an understanding of the specific oppressions of trans-misogyny and femi-negativity, this thesis has had a broad, rather then detailed, perspective and following in the foot steps of Julia Serano (2007) argues for an analysis on the position of trans women and other trans femininities beyond the gender neutral category of transgender. A majority of my informants sharp statements on the subordination of trans femininity to trans masculinity supports my argument for the need of more research in the field of trans femininity studies with perspectives from both transgender studies and critical femininity studies.Genom djupintervjuer undersöker uppsatsen sex olika transfeminina informanter i New Yorks erfarenheter av förtryck, trans-misogyni, femi-negativitet, rasism och klassism, såväl som deras erfarenheter av stöd, konflikter och motståndspraktiker, vilket sker genom ett undersökande av deras inställning till termen systerskap och den systerskapande praktiken. Fokus har också legat på informanternas syn på allierade, koalitioner och deras relation till andra grupper, som till exempel transmaskulina personer. För att fånga in en intersektionell bredd av erfarenheter var informantgruppen heterogen i förhållande till ålder, “ras”/etnicitet, samt i förhållande till var de bodde i staden och vilka delar av rörelsen de var engagerade i. Informanterna beskrev grova erfarenheter av trakasserier på gatorna och diskriminering på arbetsmarknaden, samt erfarenheter av hypersexualisering från så kallade tranny chaser's och avsexualisering från homosexuella och queera män. I linje med Jenny Gunnarsson Payne's (2006) teori om systerskap som tom signifikant, hade mina informanter många olika definitioner av begreppet systerskap, och medan många av dem uttryckte ambivalenser i förhållande till termen, använde sig alla av begreppet i varierande grad. Flera av dem såg stora fördelar i att använda termen för att beskriva samhörighet och solidaritet mellan transfeminina. Mina informanter listade flera olika konflikter inom de transfeminina rörelsen och var allmänt skeptiska till konflikter, framförallt till de som handlade om elaka attityder, tävlande, språk och terminologi – vilket jag håller med dem om, med tillägget, som en del informanter också tydliggjorde, att visa konflikter gällande intersektionella hierarkier kan vara nödvändiga. Jag argumenterar för en förståelse av trans-systerskap som baseras både i en förståelse av likheter och skillnader i erfarenheter sam i en förståelse av solidaritet som prioriterar perspektiven och ledarskapet av de mest marginaliserade rösterna. Uppsatsen har ett brett perspektiv eftersom det tidigare gjorts väldigt lite forskning om transfemininiter utifrån den specifika förståelsen av trans-misogyni och femi-negativitet. I likhet med Julia Serano (2007) argumenterar jag för ett analyserande av transkvinnors och andra transfemininas situation bortanför trans som könsneutral kategori och får stöd i majoriteten av mina informanters skarpa uttalanden om den hierarkiska underordningen av transfemininitet gentemot transmaskulinitet. Slutligen menar jag att det behövs mer forskning inom fältet transfemininitetsstudier med perspektiv både från kritiska femininitetsstudier och transstudier.
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Assuming-Gyimah, Kofi Tutu Addo. "Time domain studies of training effects in Co/Cu/FeNi/FeMn spin valves." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for fysikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-13267.
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The recovery and the relaxation behaviors of the exchange bias (HE) in a Co/Cu/FeNi/FeMnspin valve has been studied via point contact technique with high field scan rates ranging from 1050 to 13500 Oe/s. The evolution of the exchange bias with the number of field cycles(n) shows a one over the square root of (n) dependence as against ln(n) in a previous study. A recovery of the exchange bias when the field cycling is stopped has been observed and the recovery ratio (R) is found to be a function of the logarithm of the recovery time (log(t)) in agreement with previous studies. The relaxation time of the exchange bias is estimated to be 6.62, 20.85, 43.10, 109.02, and 297.24 s for 13500, 5400, 2700, 1350, and 1050 Oe/s respectively. The one over the square root of (n) dependence of HE and the log (t) dependence of R have been discussed using thermal activation model.
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Kapelrud, André. "A Scanning Tunneling Microscope for Point Contact Investigations of Magnetodynamics in FeMn/FeNi Bilayers." Thesis, Norwegian University of Science and Technology, Department of Physics, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-6410.
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This thesis presents the development of a scanning tunneling microscope purpose built for point contact investigations of magnetodynamics. The contributed changes include new measurement electronics, with 40-60% improvement in noise characteristics over previous versions, as well as major changes to the microscope’s control software, increasing stability and functionality. The microscope is demonstrated with repeated measurements of giant magnetoresistance in a FeMn/FeNi/Cu/FeNi spin valve. These measurements are shown to induce a training effect of the exchange bias in the top FeMn/FeNi bilayer, and a logarithmic time dependence of the recovery of the exchange field is uncovered, resulting in a recovery time in the order of 50 s. Both effects are shown to be in agreement with past experimental results.
Denne avhandlingen presenterer utviklingen av et tunnelmikroskop bygd med det formål å gjøre punktkontaktbaserte undersøkelser av magnetodynamikk. De bidratte endringene inkluderer ny måleelektronikk, med 40-60% forbedring i støykarakteristikk sammenlignet med tidligere versjoner, sammen med større endringer i mikroskopets programvare som bidrar til å øke mikroskopets stabilitet og funksjonalitet. Mikroskopet demonstreres ved gjentatte målinger av gigantisk magnetresistans i en FeMn/FeNi/Cu/FeNi-spinnventil. Disse vises å indusere en treningseffekt i utvekslingsfeltet til det øverste FeMn/FeNi-bilaget. Videre avdekkes en logaritmisk tidsavhengigheten i rekonvalesenseffekten til utvekslingsfeltet, som resulterer i en rekonvalesenstid på ca. 50 s. De oppnådde resultatene vises å være i overensstemmelse med tidligere eksperimentelle resultater.
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Witkowski, Thomas. "Software concepts and algorithms for an efficient and scalable parallel finite element method." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-141651.
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Software packages for the numerical solution of partial differential equations (PDEs) using the finite element method are important in different fields of research. The basic data structures and algorithms change in time, as the user\'s requirements are growing and the software must efficiently use the newest highly parallel computing systems. This is the central point of this work. To make efficiently use of parallel computing systems with growing number of independent basic computing units, i.e.~CPUs, we have to combine data structures and algorithms from different areas of mathematics and computer science. Two crucial parts are a distributed mesh and parallel solver for linear systems of equations. For both there exists multiple independent approaches. In this work we argue that it is necessary to combine both of them to allow for an efficient and scalable implementation of the finite element method. First, we present concepts, data structures and algorithms for distributed meshes, which allow for local refinement. The central point of our presentation is to provide arbitrary geometrical information of the mesh and its distribution to the linear solver. A large part of the overall computing time of the finite element method is spend by the linear solver. Thus, its parallelization is of major importance. Based on the presented concept for distributed meshes, we preset several different linear solver methods. Hereby we concentrate on general purpose linear solver, which makes only little assumptions about the systems to be solver. For this, a new FETI-DP (Finite Element Tearing and Interconnect - Dual Primal) method is proposed. Those the standard FETI-DP method is quasi optimal from a mathematical point of view, its not possible to implement it efficiently for a large number of processors (> 10,000). The main reason is a relatively small but globally distributed coarse mesh problem. To circumvent this problem, we propose a new multilevel FETI-DP method which hierarchically decompose the coarse grid problem. This leads to a more local communication pattern for solver the coarse grid problem and makes it possible to scale for a large number of processors. Besides the parallelization of the finite element method, we discuss an approach to speed up serial computations of existing finite element packages. In many computations the PDE to be solved consists of more than one variable. This is especially the case in multi-physics modeling. Observation show that in many of these computation the solution structure of the variables is different. But in the standard finite element method, only one mesh is used for the discretization of all variables. We present a multi-mesh finite element method, which allows to discretize a system of PDEs with two independently refined meshesSoftwarepakete zur numerischen Lösung partieller Differentialgleichungen mit Hilfe der Finiten-Element-Methode sind in vielen Forschungsbereichen ein wichtiges Werkzeug. Die dahinter stehenden Datenstrukturen und Algorithmen unterliegen einer ständigen Neuentwicklung um den immer weiter steigenden Anforderungen der Nutzergemeinde gerecht zu werden und um neue, hochgradig parallel Rechnerarchitekturen effizient nutzen zu können. Dies ist auch der Kernpunkt dieser Arbeit. Um parallel Rechnerarchitekturen mit einer immer höher werdenden Anzahl an von einander unabhängigen Recheneinheiten, z.B.~Prozessoren, effizient Nutzen zu können, müssen Datenstrukturen und Algorithmen aus verschiedenen Teilgebieten der Mathematik und Informatik entwickelt und miteinander kombiniert werden. Im Kern sind dies zwei Bereiche: verteilte Gitter und parallele Löser für lineare Gleichungssysteme. Für jedes der beiden Teilgebiete existieren unabhängig voneinander zahlreiche Ansätze. In dieser Arbeit wird argumentiert, dass für hochskalierbare Anwendungen der Finiten-Elemente-Methode nur eine Kombination beider Teilgebiete und die Verknüpfung der darunter liegenden Datenstrukturen eine effiziente und skalierbare Implementierung ermöglicht. Zuerst stellen wir Konzepte vor, die parallele verteile Gitter mit entsprechenden Adaptionstrategien ermöglichen. Zentraler Punkt ist hier die Informationsaufbereitung für beliebige Löser linearer Gleichungssysteme. Beim Lösen partieller Differentialgleichung mit der Finiten Elemente Methode wird ein großer Teil der Rechenzeit für das Lösen der dabei anfallenden linearen Gleichungssysteme aufgebracht. Daher ist deren Parallelisierung von zentraler Bedeutung. Basierend auf dem vorgestelltem Konzept für verteilten Gitter, welches beliebige geometrische Informationen für die linearen Löser aufbereiten kann, präsentieren wir mehrere unterschiedliche Lösermethoden. Besonders Gewicht wird dabei auf allgemeine Löser gelegt, die möglichst wenig Annahmen über das zu lösende System machen. Hierfür wird die FETI-DP (Finite Element Tearing and Interconnect - Dual Primal) Methode weiterentwickelt. Obwohl die FETI-DP Methode vom mathematischen Standpunkt her als quasi-optimal bezüglich der parallelen Skalierbarkeit gilt, kann sie für große Anzahl an Prozessoren (> 10.000) nicht mehr effizient implementiert werden. Dies liegt hauptsächlich an einem verhältnismäßig kleinem aber global verteilten Grobgitterproblem. Wir stellen eine Multilevel FETI-DP Methode vor, die dieses Problem durch eine hierarchische Komposition des Grobgitterproblems löst. Dadurch wird die Kommunikation entlang des Grobgitterproblems lokalisiert und die Skalierbarkeit der FETI-DP Methode auch für große Anzahl an Prozessoren sichergestellt. Neben der Parallelisierung der Finiten-Elemente-Methode beschäftigen wir uns in dieser Arbeit mit der Ausnutzung von bestimmten Voraussetzung um auch die sequentielle Effizienz bestehender Implementierung der Finiten-Elemente-Methode zu steigern. In vielen Fällen müssen partielle Differentialgleichungen mit mehreren Variablen gelöst werden. Sehr häufig ist dabei zu beobachten, insbesondere bei der Modellierung mehrere miteinander gekoppelter physikalischer Phänomene, dass die Lösungsstruktur der unterschiedlichen Variablen entweder schwach oder vollständig voneinander entkoppelt ist. In den meisten Implementierungen wird dabei nur ein Gitter zur Diskretisierung aller Variablen des Systems genutzt. Wir stellen eine Finite-Elemente-Methode vor, bei der zwei unabhängig voneinander verfeinerte Gitter genutzt werden können um ein System partieller Differentialgleichungen zu lösen
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Liu, Fei. "Réactions de fluoration de dérivés azotés insaturés en milieu superacide." Poitiers, 2010. http://theses.edel.univ-poitiers.fr/theses/2010/Liu-Fei/2010-Liu-Fei-These.pdf.
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L'utilisation des milieux superacides modifiant la réactivité des substrats organiques permet d'effectuer de nouvelles réactions et d'accéder rapidement à des produits originaux difficilement accessibles par les méthodes classiques. Il est alors possible de réaliser de nombreuses transformations directes, notamment des réactions de fluoration originales. Ce travail est consacré à l'étude de la réactivité de dérivés azotés insaturés en milieu superacide HF/SbF5 et en particulier au développement de nouvelles méthodes de fluoration de ce type de composés. Basée sur la formation d'intermédiaires dicationiques superélectrophiles, une nouvelle réaction d'hydrofluoration a été développée. L'utilisation de l'activation superélectrophile en milieu superacide a également permis la synthèse originale de sulfonamides cycliques et/ou fluorés. Après identification d'intermédiaires réactionnels polycationiques par analyse RMN in situ, une nouvelle méthode de synthèse de dérivés azotés gem-chlorofluorés et gem-difluorés a finalement été élaboréeIn superacid the reactivity of organic substrates is strongly modified and new reactions can be performed, which allows a rapid access to original products. In these conditions, multiple direct transformations occur and especially original fluorination reactions. This work was devoted to the study of the reactivity of unsaturated nitrogen derivatives in superacid (HF/SbF5) and to the development of new methods of fluorination of these compounds. Based on the formation of superelectrophilic dicationic intermediates, a new reaction of hydrofluorination has been developed. The use of superelectrophilic activation in superacid also allowed the original synthesis of benzofused sultams and/or fluorinated sulfonamides. After identification of reaction polycationic intermediates by NMR in situ analysis, a new synthetic route to gem-chlorofluoro nitrogen derivatives or gem-difluoro nitrogen derivatives has finally been set up
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Mosher, Victoria. "BEYOND POSTMODERN MARGINS: THEORIZING POSTFEMINIST CONSEQUENCES THROUGH POPULAR FEMALE REPRESENTATION." Master's thesis, Orlando, Fla. : University of Central Florida, 2008. http://purl.fcla.edu/fcla/etd/CFE0002141.
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Voigt, Arne-Christian. "Heteronuclear Molecules from a Quantum Degenerate Fermi-Fermi Mixture." Diss., lmu, 2009. http://nbn-resolving.de/urn:nbn:de:bvb:19-106171.
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Taglieber, Matthias. "Quantum degeneracy in an atomic fermi-fermi-bose mixture." Diss., kostenfrei, 2008. http://edoc.ub.uni-muenchen.de/8452/.
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Günter, Kenneth John. "Interacting Fermi gases and Bose-Fermi mixtures in optical lattices." Zürich : ETH, 2007. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17446.
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Campbell, Sara L. S. B. Massachusetts Institute of Technology. "Building an apparatus for ultracold lithium-potassium Fermi-Fermi mixtures." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/61204.
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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2010.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 93-95).
In this thesis, I designed and built laser systems to cool, trap and image lithium-6 and potassium-40 atoms. I also constructed the vacuum system for the experiment and experimentally tested a new method to coat the chamber with a Titanium-Zirconium- Vanadium alloy that acts as a pump. The final apparatus will use a 2D Magneto- Optical Trap (MOT) as a source of cool potassium and a Zeeman slower as a source of cool lithium. The atoms will then be trapped and cooled together in a double-species 3D MOT. In the 3D MOT, we will perform photoassociation spectroscopy on the atoms to determine the Li-K molecular energies and collisional properties. Using this information, we can transfer weakly-bound Feshbach LiK molecules into their ground state. LiK has an electric dipole moment and will open the door to the study of novel materials with very long-range interactions. This new material might form a crystal, a superfluid with anisotropic order parameter or a supersolid.
by Sara L. Campbell.
S.B.
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Setiawan, Widagdo. "Fermi Gas Microscope." Thesis, Harvard University, 2012. http://dissertations.umi.com/gsas.harvard:10225.
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Recent advances in using microscopes in ultracold atom experiment have allowed experimenters for the first time to directly observe and manipulate individual atoms in individual lattice sites. This technique enhances our capability to simulate strongly correlated systems such as Mott insulator and high temperature superconductivity. Currently, all ultracold atom experiments with high resolution imaging capability use bosonic atoms. In this thesis, I present our progress towards creating the fermionic version of the microscope experiment which is more suitable for simulating real condensed matter systems. Lithium is ideal due to the existence of both fermionic and bosonic isotopes, its light mass, which means faster experiment time scales that suppresses many sources of technical noise, and also due to the existence of a broad Feshbach resonance, which can be used to tune the inter-particle interaction strength over a wide range from attractive, non-interacting, and repulsive interactions. A high numerical aperture objective will be used to image and manipulate the atoms with single lattice site resolution. This setup should allow us to implement the Hubbard hamiltonian which could describe interesting quantum phases such as antiferromagnetism, d-wave superfluidity, and high temperature superconductivity. I will also discuss the feasibility of the Raman sideband cooling method for cooling the atoms during the imaging process. We have also developed a new electronic control system to control the sequence of the experiment. This electronic system is very scalable in order to keep up with the increasing complexity of atomic physics experiments. Furthermore, the system is also designed to be more precise in order to keep up with the faster time scale of lithium experiment.Physics
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Whitehead, Thomas Michael. "Interacting Fermi gases." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/274548.
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Interacting Fermi gases are one of the chief paradigms of condensed matter physics. They have been studied since the beginning of the development of quantum mechanics, but continue to produce surprises today. Recent experimental developments in the field of ultracold atomic gases, as well as conventional solid state materials, have produced new and exotic forms of Fermi gases, the theoretical understanding of which is still in its infancy. This Thesis aims to provide updated tools and additional insights into some of these systems, through the application of both numerical and analytical techniques. The first Part of this Thesis is concerned with the development of improved numerical tools for the study of interacting Fermi gases. These tools take the form of accurate model potentials for the dipolar and contact interactions, as found in various ultracold atomic gas experiments, and a new form of Jastrow correlation factor that interpolates between the radial symmetry of the inter-electron Coulomb potential at short inter-particle distances, and the symmetry of the numerical simulation cell at large separation. These methods are designed primarily for use in quantum Monte Carlo numerical calculations, and provide high accuracy along with considerable acceleration of simulations. The second Part shifts focus to an analytical analysis of spin-imbalanced Fermi gases with an attractive contact interaction. The spin-imbalanced Fermi gas is shown to be unstable to the formation of multi-particle instabilities, generalisations of a Cooper pair containing more than two fermions, and then a theory of superconductivity is built from these instabilities. This multi-particle superconductivity is shown to be energetically favourable over conventional superconducting phases in spin-imbalanced Fermi gases, and its unusual experimental consequences are discussed.
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Nordström, Veronica. "Fem blivande officerare & fem blivande stridspiloter." Thesis, Malmö högskola, Lärarutbildningen (LUT), 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-32423.
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SAMMANFATTNINGDet sägs att vi lever i ett individualistiskt och flexibelt samhälle. För den starka individen innebär detta att karriär, utveckling och privata intressen värderas högre än lojalitet gentemot arbetsgivaren. Att byta arbetsgivare under sitt yrkesverksamma liv betraktas idag mer som regel än undantag. Hur resonerar då blivande officerare och stridspiloter som har valt att utbilda sig till ett yrke som endast går att utöva i en enda organisation? Kan studenter, som i princip bara har en arbetsgivare att välja på, verkligen ha behov av karriärvägledning? Syftet med studien är att få en förståelse för hur blivande officerare och stridspiloter ser på sig själva i organisationen, samt vilka upplevda behov de har av karriärvägledning. För att undersöka detta område närmare har jag genomfört gruppintervjuer med fem blivande officerare och fem blivande stridspiloter. Resultatet visar att en majoritet av deltagarna i studien har en marknadsmässig inställning. Karriär, utveckling och privata intressen är i hög grad styrande för deras val, men de visar också tecken på institutionalisering då de har tagit till sig organisationens värderingar som sina egna. Studenterna upplever ett behov av både taktisk och strategisk karriärvägledning.
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Di, Giulio Alessandro. "Modello di Thomas-Fermi." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/16947/.
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Drut, Joaquín E. "The unitary Fermi gas /." Thesis, Connect to this title online; UW restricted, 2008. http://hdl.handle.net/1773/9745.
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Sadeghzadeh, Kayvan. "Spin polarised Fermi gases." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610744.
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Molina-Sepulveda, Roberto. "Hybridization of FETI Methods." Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066455/document.
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Dans le présent travail, des nouvelles méthodes de décomposition de domaine et des nouvelles implémentations pour des méthodes existantes sont développées. Une nouvelle méthode basée sur les méthodes antérieures de décomposition du domaine est formulée. Les méthodes classiques FETI plus FETI-2LM sont utilisées pour construire le nouveau Hybrid-FETI. L'idée de base est de développer un nouvel algorithme qui peut utiliser les deux méthodes en même temps en choisissant dans chaque interface l'état le plus adapté en fonction des caractéristiques du problème. En faisant cela, nous recherchons un code plus rapide et plus robuste qui peut fonctionner avec des configurations selon lesquelles les méthodes de base ne le géreront pas de manière optimale par lui-même. La performance est testée sur un problème de contact. La partie suivante implique le développement d'une nouvelle implémentation pour la méthode S-FETI, l'idée est de réduire l'utilisation de la mémoire de cette méthode, afin de pouvoir fonctionner dans des problèmes de taille plus important. Différentes variantes pour cette méthode sont également proposées, tout en cherchant la réduction des directions stockées chaque itération de la méthode itérative. Finalement, une extension de la méthode FETI-2LM à sa version en bloc comme dans S-FETI, est développée. Les résultats numériques pour les différents algorithmes sont présentésIn this work new domain decomposition methods and new implementations for existing methods are developed. A new method based on previous domain decomposition methods is formulated. The classic FETI plus FETI-2LM methods are used to build the new Hybrid-FETI. The basic idea is to develop a new algorithm that can use both methods at the same time by choosing in each interface the most suited condition depending on the characteristics of the problem. By doing this we search to have a faster and more robust code that can work with configurations that the base methods will not handle it optimally by himself. The performance is tested on a contact problem. The following part involves the development of a new implementation for the S-FETI method, the idea is to reduce the memory usage of this method, to make it able to work in larger problem. Different variation for this method are also proposed, all searching the reduction of directions stored each iteration of the iterative method. Finally, an extension of the FETI-2LM method to his block version as in S-FETI, is developed. Numerical results for the different algorithms are presented
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Costa, Louis. "An interacting Fermi-Fermi mixture at the crossover of a narrow Feshbach resonance." Diss., lmu, 2011. http://nbn-resolving.de/urn:nbn:de:bvb:19-131291.
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Freeman, Eric J. "Heavy Fermi and non-Fermi liquid behavior, superconductivity and magnetism in f-electron metals /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC IP addresses, 2001. http://wwwlib.umi.com/cr/ucsd/fullcit?p3013710.
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Sousa, Danila Fernandes Tavares de. "DissipaÃÃo no Modelo Fermi-Ulam." Universidade Federal do CearÃ, 2012. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=7239.
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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgicoNeste trabalho, revisitamos o modelo do acelerador de Fermi, tambÃm conhecido como modelo Fermi-Ulam. Este modelo consiste de uma partÃcula clÃssica de massa unitÃria que està confinada e colidindo elasticamente entre duas paredes rÃgidas, uma delas sendo fixa e a outra dependente do tempo. A descriÃÃo da dinÃmica à feita todas as vezes que a partÃcula colide com a parede mÃvel, de modo que o conhecimento dos valores da velocidade da partÃcula e do tempo no instante da colisÃo descrevem toda a dinÃmica. Duas versÃes para este modelo sÃo estudadas: a versÃo completa e a versÃo simplificada. Na versÃo simplificada, as duas paredes do modelo sÃo assumidas como sendo fixas. O modelo Fermi-Ulam à um modelo conservativo, pois preserva medida do espaÃo de fases. Nossos resultados analÃticos e numÃricos para este modelo conservativo sÃo apresentados e discutidos. Algumas propriedades dinÃmicas para uma partÃcula sofrendo a aÃÃo de uma forÃa de arrasto sÃo obtidas para um modelo Fermi-Ulam dissipativo. A dissipaÃÃo à introduzida via uma forÃa de arrasto viscoso, como um gÃs, que à assumida como sendo proporcional `a velocidade elevada a um expoente γ, F = −ηV^{ γ}. As dinÃmicas dos modelos sÃo descritas por mapeamentos bidimensionais nÃo-lineares obtidos via solucÃes da segunda lei de Newton. NÃs provamos, analiticamente, que o decaimento para altas energias à dado por uma fraÃÃo continuada que recupera as seguintes expressÃes: (i) linear para γ = 1; (ii) exponencial para γ = 2 e (iii) um polinÃmio de segundo grau para γ = 1.5. Os resultados numÃricos mostram um comportamento polinomial para o decaimento da velocidade. Nossos resultados sÃo discutidos para as versÃes completa e simplificada dos modelos. Os espaÃos de fases e as bacias de atraÃÃo para alguns valores de γ sÃo obtidos. Complementando nossos estudos sobre esta versÃo dissipativa do modelo Fermi-Ulam, um modelo misto tambÃm à proposto. Neste modelo, a partÃcula viaja atravÃs de dois meios distintos. Sua dinÃmica à iniciada em um meio sem dissipaÃÃo, digamos, um vÃcuo e em algum ponto ela entra em uma regiÃo dissipativa. A dissipaÃÃo tambÃm à introduzida por uma forÃa de arrasto viscoso, tal que F = −ηV^{γ}. Em particular, para o estudo do modelo misto utilizamos γ = 1 e γ = 2. O sistema à caracterizado pela relaÃÃo de dois meios de comprimento λ. NÃs mostramos que existe uma transiÃÃo suave do regime de velocidade conforme λ à variado. ConstruÃmos os espaÃos de fases para as versÃes completa e simplificada dos modelos. Para os casos limites, λ=0 ou λ=1, o sistema comporta-se como um Ãnico meio.
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Sousa, Danila Fernandes Tavares de. "Dissipação no Modelo Fermi-Ulam." reponame:Repositório Institucional da UFC, 2012. http://www.repositorio.ufc.br/handle/riufc/13628.
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SOUSA, Danila Fernandes Tavares de. Dissipação no Modelo Fermi-Ulam. 2012. 131 f. Tese (Doutorado em Física) - Programa de Pós-Graduação em Física, Departamento de Física, Centro de Ciências, Universidade Federal do Ceará, Fortaleza, 2012.Submitted by Edvander Pires (edvanderpires@gmail.com) on 2015-10-20T18:36:54Z No. of bitstreams: 1 2012_tese_dftsousa.pdf: 14704159 bytes, checksum: bf2d7f19ae743de453cdf3921e42e4fb (MD5)
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Neste trabalho, revisitamos o modelo do acelerador de Fermi, também conhecido como modelo Fermi-Ulam. Este modelo consiste de uma partícula clássica de massa unitária que está confinada e colidindo elasticamente entre duas paredes rígidas, uma delas sendo fixa e a outra dependente do tempo. A descrição da dinâmica é feita todas as vezes que a partícula colide com a parede móvel, de modo que o conhecimento dos valores da velocidade da partícula e do tempo no instante da colisão descrevem toda a dinâmica. Duas versões para este modelo são estudadas: a versão completa e a versão simplificada. Na versão simplificada, as duas paredes do modelo são assumidas como sendo fixas. O modelo Fermi-Ulam é um modelo conservativo, pois preserva medida do espaço de fases. Nossos resultados analíticos e numéricos para este modelo conservativo são apresentados e discutidos. Algumas propriedades dinâmicas para uma partícula sofrendo a ação de uma força de arrasto são obtidas para um modelo Fermi-Ulam dissipativo. A dissipação é introduzida via uma força de arrasto viscoso, como um gás, que é assumida como sendo proporcional `a velocidade elevada a um expoente γ, F = −ηV^{ γ}. As dinâmicas dos modelos são descritas por mapeamentos bidimensionais não-lineares obtidos via solucões da segunda lei de Newton. Nós provamos, analiticamente, que o decaimento para altas energias é dado por uma fração continuada que recupera as seguintes expressões: (i) linear para γ = 1; (ii) exponencial para γ = 2 e (iii) um polinômio de segundo grau para γ = 1.5. Os resultados numéricos mostram um comportamento polinomial para o decaimento da velocidade. Nossos resultados são discutidos para as versões completa e simplificada dos modelos. Os espaços de fases e as bacias de atração para alguns valores de γ são obtidos. Complementando nossos estudos sobre esta versão dissipativa do modelo Fermi-Ulam, um modelo misto também é proposto. Neste modelo, a partícula viaja através de dois meios distintos. Sua dinâmica é iniciada em um meio sem dissipação, digamos, um vácuo e em algum ponto ela entra em uma região dissipativa. A dissipação também é introduzida por uma força de arrasto viscoso, tal que F = −ηV^{γ}. Em particular, para o estudo do modelo misto utilizamos γ = 1 e γ = 2. O sistema é caracterizado pela relação de dois meios de comprimento λ. Nós mostramos que existe uma transição suave do regime de velocidade conforme λ é variado. Construímos os espaços de fases para as versões completa e simplificada dos modelos. Para os casos limites, λ=0 ou λ=1, o sistema comporta-se como um único meio.
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Reidy, Kelly E. "Fermi liquids near Pomeranchuk instabilities." Kent State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=kent1406286277.
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Trione, Ingrid. "De fem sinnena." Thesis, Konstfack, Inredningsarkitektur & Möbeldesign, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:konstfack:diva-2694.
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Prüfer, Hans-Peter. "Quo vadis, FEM?" TUDpress - Verlag der Wissenschaften GmbH, 2012. https://tud.qucosa.de/id/qucosa%3A30501.
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Seitdem die Methode der Finiten Elemente dank der rapiden Fortschritte der Hard- und Softwareentwicklung ihr anfängliches Nischendasein aufgeben konnte, ist sie zu einem unverzichtbaren Werkzeug der Produktentwicklung geworden. Anwenderseitig wurde mit dieser Entwicklung jedoch nicht immer Schritt gehalten. Anstelle der wenigen Spezialisten früherer Jahre nutzt inzwischen beinahe jeder, der über die entsprechenden Programme verfügt, die FEM, mit zuweilen zweifelhaften Resultaten – »The stark reality is that probably the majority of users are blissfully unaware that their analyses are invalid.« (Horspool 2010). In diesem Beitrag wird die aktuelle Anwendungssituation untersucht, und es werden Ausbildungskonzepte vorgestellt, die zu besseren und sichereren Analysen führen sollen. In den folgenden drei kleinen Szenarien sind zur Einstimmung typische Fehlschlüsse – ein wenig überzogen – dargestellt.
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Santos, Krystin. "AUTO-FEM: ESSAYS." UKnowledge, 2018. https://uknowledge.uky.edu/english_etds/72.
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Auto Fem: Essays is a nonfiction essay collection revolving around one young woman’s family and their relationship to the motors that accelerate familial bonds. Each motor-related essay brings readers deeper into the admiration of speed and the environment that surrounds it. The essays span from the author's childhood into adulthood, revealing the different ways a woman is sexualized within these subcultures. This sexualization leads to internal battles for the female participant that result in sometimes toxic eating habits and a complicated body image.
The author provides a sometimes brutal, sometimes funny, but always honest view. The essays collected here explore one woman's experience of being a woman within male-dominated spaces-- from table gambling in casinos to Harley Davidson motorcycle rallies. These essays explore over twenty years of one nuclear family's love for motors and each other.
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Prüfer, Hans-Peter. "Quo vadis, FEM?" Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-228221.
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Seitdem die Methode der Finiten Elemente dank der rapiden Fortschritte der Hard- und Softwareentwicklung ihr anfängliches Nischendasein aufgeben konnte, ist sie zu einem unverzichtbaren Werkzeug der Produktentwicklung geworden. Anwenderseitig wurde mit dieser Entwicklung jedoch nicht immer Schritt gehalten. Anstelle der wenigen Spezialisten früherer Jahre nutzt inzwischen beinahe jeder, der über die entsprechenden Programme verfügt, die FEM, mit zuweilen zweifelhaften Resultaten – »The stark reality is that probably the majority of users are blissfully unaware that their analyses are invalid.« (Horspool 2010). In diesem Beitrag wird die aktuelle Anwendungssituation untersucht, und es werden Ausbildungskonzepte vorgestellt, die zu besseren und sichereren Analysen führen sollen. In den folgenden drei kleinen Szenarien sind zur Einstimmung typische Fehlschlüsse – ein wenig überzogen – dargestellt.
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Elgazzar, Saad. "Fermi Surface Calculations of Superconducting Compounds." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2006. http://nbn-resolving.de/urn:nbn:de:swb:14-1145602457209-76254.
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In dieser Doktorarbeit wurde die elektronische Struktur von konventionellen und unkonventionellen Supraleitern untersucht. Das Ziel dieser Arbeit war es, die dHvA Parameter zu berechnen und mit experimentellen Daten zu vergleichen. Mit Hilfe des Bandstrukturprogrammes FPLO, welches auf der DFT basiert, untersuchten wir Diboride (MgB$_2$ und TaB$_2$) und schwere Fermionenverbindungen (CeMIn$_5$ und PuMGa$_5$, M=Co, Rh, und Ir) innerhalb der LSD-NäherungIn this thesis theoretical study of the electronic structure of conventional and unconventional superconductor compounds was carried out. The goal was to calculate the dHvA parameters in comparison with available experimental data. By means of FPLO band structure code based on DFT within LSDA we investigated diborides (MgB$_2$ and TaB$_2$) and heavy fermion compounds (CeMIn$_5$ and PuMGa$_5$, M=Co, Rh, and Ir)
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Andrew, Caroline. "The Fermi surface of iron pnictides." Thesis, University of Bristol, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.528070.
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Pivovarov, Eugene Preskill John P. "Aspects of non-Fermi-liquid metals /." Diss., Pasadena, Calif. : California Institute of Technology, 2002. http://resolver.caltech.edu/CaltechETD:etd-05302002-130637.
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Lee, Ye-Ryoung. "Ultracold Fermi gas with repulsive interactions." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/79520.
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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2012.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 95-100).
This thesis presents results from experiments of ultracold atomic Fermi gases with repulsive interaction. Itinerant ferromagnetism was studied by simulating the Stoner model with a strongly interacting Fermi gas of ultracold atoms. We observed nonmonotonic behavior of lifetime, kinetic energy, and size for increasing repulsive interactions, which is in good agreement with a mean-field model for the ferromagnetic phase transition. However, later research showed the absence of enhanced spin fluctuation, which is definitive evidence against the ferromagnetic phase transition. Still, our work triggered a lot of research on repulsive interactions in ultracold Fermi gases. A quantitative approach is taken to study ultracold Fermi gases with repulsive interaction. This is done by careful measurements of density profiles in equilibrium. First, Pauli paramagnetism is observed in trapped atomic samples which have an inhomogeneous density due to the harmonic confinement potential. We experimentally measure the susceptibility of ideal Fermi gas. This research shows that ultracold atoms can serve as model systems to demonstrate well-known textbook physics in a more ideal way than other systems. Then, Fermi gases with repulsive interactions are characterized by measuring their compressibility as a function of interaction strength. The compressibility is obtained from in-trap density distributions monitored by phase contrast imaging. For interaction parameters kFa > 0.25 fast decay of the gas prevents the observation of equilibrium profiles. For smaller interaction parameters, the results are adequately described by first-order perturbation theory. A novel phase contrast imaging method compensates for dispersive distortions of the images.
by Ye-Ryoung Lee.
Ph.D.
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Setiawan, Widagdo. "A new degenerate Fermi gas apparatus." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/40912.
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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2007.Includes bibliographical references (leaf 79).
In the summer of 2004, the BEC 2 lab of Wolfgang Ketterle's group at MIT started a new research direction of studying degenerate fermionic Lithium atoms in optical lattices. The major contributions to the new experimental setup are the Lithium laser system, a new imaging technique, and an advanced experiment control system. First, a tapered amplifier laser diode system is discussed. The laser is locked using an error signal generated using frequency modulation of saturated absorption spectroscopy of Lithium Vapor. The laser is then locked using a PID controller. Second, a new imaging system is developed. The imaging system is designed to eliminate noise generated by the mechanical vibrations of the machine. The system relies on taking multiple images with time scale shorter than typical vibration periods. Third, a new experiment control system is developed. The new control system replaced the outdated 8 years old control system by providing us with more channels and speed, combined with an automation feature. The new system is designed to accommodate more complex experiments in the future.
by Widagdo Setiawan.
S.B.
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Elgazzar, Saad. "Fermi Surface Calculations of Superconducting Compounds." Doctoral thesis, Technische Universität Dresden, 2005. https://tud.qucosa.de/id/qucosa%3A24692.
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In dieser Doktorarbeit wurde die elektronische Struktur von konventionellen und unkonventionellen Supraleitern untersucht. Das Ziel dieser Arbeit war es, die dHvA Parameter zu berechnen und mit experimentellen Daten zu vergleichen. Mit Hilfe des Bandstrukturprogrammes FPLO, welches auf der DFT basiert, untersuchten wir Diboride (MgB$_2$ und TaB$_2$) und schwere Fermionenverbindungen (CeMIn$_5$ und PuMGa$_5$, M=Co, Rh, und Ir) innerhalb der LSD-Näherung.In this thesis theoretical study of the electronic structure of conventional and unconventional superconductor compounds was carried out. The goal was to calculate the dHvA parameters in comparison with available experimental data. By means of FPLO band structure code based on DFT within LSDA we investigated diborides (MgB$_2$ and TaB$_2$) and heavy fermion compounds (CeMIn$_5$ and PuMGa$_5$, M=Co, Rh, and Ir).
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Edge, Jonathan Martin. "Collective phenomena in ultracold Fermi gases." Thesis, University of Cambridge, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609264.
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Lu, Jianxu. "Investigation of the deformed fermi surfaces." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-2111.
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Oré, Casio R. "El nivel Fermi en semiconductores dopados." Pontificia Universidad Católica del Perú, 2014. http://repositorio.pucp.edu.pe/index/handle/123456789/95801.
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Kubo, Naotaka. "Brane dynamics in Fermi gas formalism." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263458.
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Gochan, Matthew. "Fermi Liquid Properties of Dirac Materials:." Thesis, Boston College, 2020. http://hdl.handle.net/2345/bc-ir:108726.
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Thesis advisor: Kevin S. BedellOne of the many achievements of renowned physicist L.D. Landau was the formulation of Fermi Liquid Theory (FLT). Originally debuted in the 1950s, FLT has seen abundant success in understanding degenerate Fermi systems and is still used today when trying to understand the physics of a new interacting Fermi system. Of its many advantages, FLT excels in explaining why interacting Fermi systems behave like their non-interacting counterparts, and understanding transport phenomena without cumbersome and confusing mathematics. In this work, FLT is applied to systems whose low energy excitations obey the massless Dirac equation; i.e. the energy dispersion is linear in momentum, ε α ρ, as opposed to the normal quadratic, ε α ρ². Such behavior is seen in numerous, seemingly unrelated, materials including graphene, high T[subscript]c superconductors, Weyl semimetals, etc. While each of these materials possesses its own unique properties, it is their low energy behavior that provides the justification for their grouping into one family of materials called Dirac materials (DM). As will be shown, the linear spectrum and massless behavior leads to profound differences from the normal Fermi liquid behavior in both equilibrium and transport phenomena. For example, with mass having no meaning, we see the usual effective mass relation from FLT being replaced by an effective velocity ratio. Additionally, as FLT in d=2 has been poorly studied in the past, and since the most famous DM in graphene is a d=2 system, a thorough analysis of FLT in d=2 is presented. This reduced dimensionality leads to substantial differences including undamped collective modes and altered quasiparticle lifetime. In chapter 3, we apply the Virial theorem to DM and obtain an expression for the total average ground state energy $E=\frac{B}{r_s}$ where $B$ is a constant independent of density and $r_s$ is a dimensionless parameter related to the density of the system: the interparticle spacing $r$ is related to $r_s$ through $r=ar_s$ where $a$ is a characterstic length of the system (for example, in graphene, $a=1.42$ \AA). The expression derived for $E$ is unusual in that it's typically impossible to obtain a closed form for the energy with all interactions included. Additionally, the result allows for easy calculation of various thermodynamic quantities such as the compressibility and chemical potential. From there, we use the Fermi liquid results from the previous chapter and obtain an expression for $B$ in terms of constants and Fermi liquid parameters $F_0^s$ and $F_1^s$. When combined with experimental results for the compressibility, we find that the Fermi liquid parameters are density independent implying a unitary like behavior for DM. In chapter 4, we discuss the alleged universal KSS lower bound in DM. The bound, $\frac{\eta}{s}\geq\frac{\hbar}{4\pi k_B}$, was derived from high energy/string theory considerations and was conjectured to be obeyed by all quantum liquids regardless of density. The bound provides information on the interactions in the quantum liquid being studied and equality indicates a nearly perfect quantum fluid. Since its birth, the bound has been highly studied in various systems, mathematically broken, and poorly experimented on due to the difficult nature of measuring viscosity. First, we provide the first physical example of violation by showing $\frac{\eta}{s}\rightarrow 0$ as $T\rightarrow T_c$ in a unitary Fermi gas. Next, we determine the bound in DM in d=2,3 and show unusual behavior that isn't seen when the bound is calculated for normal Fermi systems. Finally we conclude in chapter 5 and discuss the outlook and other avenues to explore in DM. Specifically, it must be pointed out that the physics of what happens near charge neutrality in DM is still poorly understood. Our work in understanding the Fermi liquid state in DM is necessary in understanding DM as a whole. Such a task is crucial when we consider the potential in DM, experimentally, technologically, and purely for our understanding
Thesis (PhD) — Boston College, 2020
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Physics
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Schneider, William. "Strong Correlations in Ultracold Fermi Gases." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1316447449.
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Ferrier-Barbut, Igor. "Mixtures of Bose and Fermi Superfluids." Thesis, Paris, Ecole normale supérieure, 2014. http://www.theses.fr/2014ENSU0012/document.
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On trouve des manifestations de la physique quantique au niveau thermodynamique dansde nombreux systèmes. Un exemple marquant est la superfluidité, découverte au début du20ème siècle, que l’on retrouve de l’hélium aux étoiles à neutrons. Les gaz dilués ultrafroidsoffrent une polyvalence unique pour étudier des systèmes quantiquesmacroscopiques, pouvant directement tester les théories grâce à un environnementcontrôlé. Dans cette thèse, nous présentons plusieurs études expérimentales de gaz froidsde lithium. Le lithium fournit la possibilité de réaliser des ensembles de bosons et defermions, avec des interactions contrôlables entre les constituants. Nous présentons lestechniques utilisées pour préparer et étudier des gaz dégénérés de lithium, et uneamélioration possible des méthodes existantes. Nous décrivons premièrement une étudede la recombinaison à trois bosons avec une interaction à deux corps résonante. Comparésquantitativement à la théorie, ces résultats fournissent une référence pour les étudesfutures du gaz de Bose unitaire. Pour finir, nous présentons la première observationexpérimentale d’un mélange de superfluides de Bose et de Fermi. Nous démontrons queles deux composants sont superfluides et que leur écoulement relatif vérifie les propriétésdes écoulement superfluides, avec une absence de viscosité en dessous d’une vitessecritique puis la présence de dissipation au-delà. En utilisant des excitations collectives dece mélange, nous mesurons l’interaction entre les deux superfluides, en accord avec unmodèle théoriqueManifestations of Quantum Physics at the thermodynamical level are found in a broadrange of physical systems. A famous example is superfluidity, discovered at the beginningof the 20th century and found in many different situations, from liquid helium to neutronstars. Dilute ultracold gases offer a unique versatility to engineer quantum many-bodysystems, which can be directly compared with theory thanks to the controllability of theirenvironment. In this thesis we present several experimental investigations led on ultracoldlithium gases. Lithium provides the possibility to study ensembles of bosons andfermions, with controllable interactions between the constituents. We present experimentaltechniques for preparation and studies of degenerate gases of lithium, with prospects forimprovement of the existing methods. We first report on an investigation of three-bodyrecombination of bosons under a resonant two-body interaction. This study, quantitativelycompared with theory constitutes a benchmark for further studies of the unitary Bose gas.Finally, we present the first experimental realization of a mixture of a Bose superfluid witha Fermi superfluid. We demon- strate that both components are in the superfluid regime,and that the counter-flow motion between them possesses the characteristics of superfluidflow, with the absence of viscosity below a critical velocity, and an onset of friction above.Using collective oscillations of the mixture, we measure the coupling between the twosuperfluids in close agreement with a theoretical model
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Larsson, Joakim, and Aarto Niskanen. "FEM i praktiken : En studie i FEM-Designs användningsområden inom konstruktionsprojektering." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-172552.
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This diploma work has been conducted for the consulting company Ramböll inUppsala, Sweden with the purpose to perform a study with the calculation programFEM Design 9.0 made by Strusoft. The aim has been to find out if it is possible to gainadvantage by utilizing more advanced 3D software for design calculations, instead ofthe traditional methods currently used in construction works.The method of approach has been to model an existing warehouse building with theprogram FEM Design, and then compare the results with those attained with FrameAnalysis and hand calculations. These results are then analyzed. An evaluation is maderegarding to what benefits can be achieved using a more advanced 3D-model.The results of the study show that the differences between the methods are not ofany significance with regard to the design of the steel frame. However in morecomplex materials such as reinforced concrete, the differences become more notable.The conclusions drawn by the authors of this study into FEM Design are that theeducation requirements of the program are higher than for simpler programs, whosepurpose are solving predetermined problems. More time is also needed to create themodels used in full 3D software compared to the traditional simpler methods.Despite this there is a great potential in using FEM Design for both small and largeconstruction projects.
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Maria, Tabib, and Azizi Shahin. "De fem förmågorna i matematikundervisningen. : Hur läromedlet kan främja de fem förmågorna." Thesis, Mälardalens högskola, Akademin för utbildning, kultur och kommunikation, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-54818.
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Syftet med denna studie var att få vetskap om hur lärare använder sig av Favoritmatematik i undervisningen för att främja elevernas kunskaper i de femförmågorna. Syftet var även att få en uppfattning om hur läraren förhåller sig tillundervisningen om läromedlet inte räcker till. Vi valde att utföra kvalitativaintervjuer via zoom med F-3 lärare. Urvalet består av sex erfarna lärare som hararbetet med matematikundervisning i lågstadiet i minst 4 år. I vårt resultatframkommer det att lärarna använder sig av läromedlet i stor utsträckning menatt de behöver komplettera detta med övningar och extra material.
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Azizi, Shahin, and Maria Tabib. "De fem förmågorna i matematik : Hur läromedlet kan främja de fem förmågorna." Thesis, Mälardalens högskola, Akademin för utbildning, kultur och kommunikation, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-55087.
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Syftet med denna studie var att få vetskap om hur lärare använder sig av Favorit matematik i undervisningen för att främja elevernas kunskaper i de fem förmågorna. Syftet var även att få en uppfattning om hur läraren förhåller sig till undervisningen om läromedlet inte räcker till. Vi valde att utföra kvalitativa intervjuer via zoom med F-3 lärare. Urvalet består av sex erfarna lärare som har arbetet med matematikundervisning i lågstadiet i minst 4 år. I vårt resultat framkommer det att lärarna använder sig av läromedlet i stor utsträckning men att de behöver komplettera detta med övningar och extra material.The purpose of this study was to gain knowledge about how teachers use Favorite Mathematics in teaching to promote students' knowledge of the five abilities. The purpose was also to get an idea of how the teacher relates to the teaching if the teaching aid is not enough. We chose to conduct qualitative interviews via zoom with F-3 teachers. The sample consists of six experienced teachers who have worked with mathematic teaching in primary school for at least 4 years. In our result, it appears that the teachers use the teaching aid to a large extent, but that they need to supplement this with exercises and extra material.
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von, Martens David. "Grundskolan Fem Gröna Floder." Thesis, KTH, Arkitektur, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-189044.
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Kandidatprojektet är ett gestalningsprojekt inom arkitektur av en grundskola för ca 700 elever i Fornuddsparken i Tyresö kommun söder om Stockholm i Sverige. Syftet med projektet har varit att utforska hur en grundskola kan utformas med fokus på relationen mellan arkitektur, pedagogik och fysisk rörelse inomhus och utomhus. Grundskolan sammanfattad med siffror: - Fem gröna floder för att dra in parken i skolan, skapa struktur för hinderbanor, dämpa ljudnivån, för en mer varierad inre miljö och för en friskare luft. - Sex omslutande skivor för formmässig stabilitet, struktur för orienterbarhet och för en tydligt sammankopplad inre och yttre gatumiljö. - Tio kvarter innehållande trygga basytor att utgå från med utblickar mot parken, de livfulla gatorna mellan kvarteren och mot lugnare miljöer. - Mer än hundra träpelare kombinerade med massivträ och träregelväggar. Skolans gestaltningsarbete vilar på tre konceptuella beslut: - Idén att elever och lärare ska inspireras till fysisk aktivitet både inomhus och utomhus. - Organiseringen av inre rum går före yttre form. Det flytande öppna rummet som skapas mellan de mer slutna funktioner har prioriterats före den yttre formen. - Arbeta för en stark integration mellan park/utemiljö och skolbyggnadens inre miljö. Arbetsmetodiken har bestått av en systematisk process med en dynamisk växelverkan mellan delprocesser som: Studiebesök på skolor, inläsning om pedagogik och skolarkitektur, lokalprogramstudier med sambandsdiagram, idé och konceptutveckling med collage, skisser och texter, gestaltningsprocess med hjälp av skisser, CAD-ritningar, fysiska modeller och digitala 3D-modeller, diskussioner och kritisk analys av gestaltade lösningar med handledare, kursdeltagare och stödpersoner.This bachelor project is an architecture design project of an elementary school for 700 students. The site location is in a park, Fornuddsparken, in Tyresö south of Stockholm in Sweden.The aim for the project was to explore how a school building of this size can be designed with a special focus on the relations between architecture, pedagogy and both indoor and outdoor physical movement. The elementary school with numbers: - Five green rivers to connect the park with the interior of the school, establish a structure that can be used for obstacle courses, improve the indoor acoustics, create a more diverse environment and for a more healthy air inside the building. - Six embracing, folded slabs to give stability to the form, a structure for easier orientation on the site and to structurally connect the inside street corridors with the outside schoolyard. - Ten blocks with more private and safe base rooms with views at the park, the more crowded street corridors between the blocks and views at more serene sceneries outside the school area. - More than one hundred pillars combined with bearing massive wood elements and wood stud walls. The design is based on three main concepts: - The idea that students and teachers should be inspired to more indoor and outdoor physical movements. - The priority in the design process should be the organization of the interior spaces not the form itself; an inside to outside approach in forming the building. - The aim to integrate the outside park and schoolyard with the inside of the building. The working method has been based on a systematic process with a reciprocal action and iteration of sub processes like: Study visits to schools, reading sessions about teaching and school architecture, studies of the program for the school with space organization diagrams, developing ideas and concepts with collages, sketches and writing, the main design process using tools like sketching, CAD-drawings, paper and wood models and digital 3D-models, discussions and critical analysis of the created drawings with the aid of tutors, students and other advisors.
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Ingvarsson, Sunniva. "Fem fragment om måleri." Thesis, Konstfack, Institutionen för Konst (K), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:konstfack:diva-7710.
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This bachelor essay presents some aspects of Sunniva Ingvarssons painting process. Comparing the painterly act with writing (about the field of her practice) the text aims to grasp some outlooks on the use of words or verbal contentmaking connected to a nearly nonverbal expression. The painted gestures and markmakings are being discussed as meaningless in a meaningful way, arguing whether the parameters of the established should be taken in consideration in the artistic research, or not. Based on subjective experiences and some readings including Susan Sontag, Judith Butler (and Friedrich Schlegel) there is an aim to make the reader understand the eventual importance of the un-validated thoughts art possibly can consist of, with permission of only the artist.
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Sandberg, Thomas. "FEM-beräkningar av bandsågständer." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-80344.
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Falkman, Jennica, and Mimmi Johansson. "Fem lärares litteraturdidaktiska övervägande." Thesis, Malmö högskola, Lärarutbildningen (LUT), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-35932.
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Syftet med denna uppsats var att undersöka vad några lärare säger om sina arbetssätt inom skönlitteratur och hur de använder sig av dessa för att motivera till läsning och utveckla olika elevgruppers läsförmåga. Vi har använt oss av kvalitativa intervjuer med fem lärare på fyra olika skolor och kommuner. Resultatet visar att alla lärare trots skillnader i bakgrunder och år i yrket använder sig av liknande arbetsätt för att motivera till och utveckla olika elevers läsförmåga inom skönlitteratur. Vår slutsats är att ett varierat arbetsätt inom litteraturundervisning gör det möjligt att motivera till och utveckla olika elever läsförmåga inom skönlitteratur eftersom olika elever lär på olika sätt och har olika behov och utgångspunkter för sin läsning.Five teacher’s literature didaactics consideration