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Aït, Oukaci Kosseila. "Domaines magnétiques périodiques pour la propagation guidée d’ondes de spin". Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0100.
Pełny tekst źródłaThe International Technology Roadmap for Semiconductors has identified spin wave devices as an alternative to CMOS technology for logic devices. The interest of these emerging devices lies in the scalability needed to process the ever-increasing amount of data generated by our information and communication society while maintaining low power consumption. However, standard devices suffer from drawbacks related to miniaturization and do not offer the possibility to enter the field of fully reprogrammable logic devices. The objective of my thesis is to establish a new path towards scalable and reprogrammable logic devices. This path is based on the stabilization of rectilinear periodic magnetic domains whose orientation can be configured to open or close the transmission channel. This channel will be formed in a low-damping material for spin wave propagation over micron distances. On one hand, magnetic domains of the Weak Stripes type have been obtained in the Co₄₀Fe₄₀B₂₀ alloy. We have shown that these domains are easily orientable, which will allow to easily open or close the transmission channel of spin waves. We show that a damping lower than 7×10⁻³ can be obtained. Magnetic microscopy allowed us to determine the angle of magnetization in the stripes, its spatial distribution as well as its variation under magnetic field. In addition, we show for the first time the surface configuration of these Weak Stripes, a configuration in accordance with the micromagnetic simulations. On the other hand, Strong Stripes magnetic domains are obtained in the [Co/Ni]n multilayers. Their properties are close to those observed in other materials such as Co epitaxial films. A damping coefficient lower than 8.8 ×10⁻³ is obtained, among the smallest for perpendicular magnetization systems. The study of their microscopic magnetic properties shows that the orientation of straight domains is more difficult to obtain because of a stripe/bubble transformation which has not yet been documented in the literature
Khatun, Zohora. "On string and W-strings". Thesis, Queen Mary, University of London, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297181.
Pełny tekst źródłaStiffler, Kory M. "A walk through superstring theory with an application to Yang-Mills theory: k-strings and D-branes as gauge/gravity dual objects". Diss., University of Iowa, 2010. https://ir.uiowa.edu/etd/744.
Pełny tekst źródłaForini, Valentina. "Non trivial string backgrounds: Tachyons in String Field Theory and Plane-waves in DLCQ Strings". Doctoral thesis, Università degli studi di Trento, 2006. https://hdl.handle.net/11572/368486.
Pełny tekst źródłaForini, Valentina. "Non trivial string backgrounds: Tachyons in String Field Theory and Plane-waves in DLCQ Strings". Doctoral thesis, University of Trento, 2006. http://eprints-phd.biblio.unitn.it/1059/1/ForiniDocTh.pdf.
Pełny tekst źródłaSandoval, Leonidas. "String scattering amplitudes". Thesis, King's College London (University of London), 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261874.
Pełny tekst źródłaWulff, Linus. "Strings, boundary fermions and coincident D-branes". Doctoral thesis, Stockholm : Department of Physics, Stockholm University, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-6576.
Pełny tekst źródłaMorris, Willie J. "Strings /". View online, 2010. http://repository.eiu.edu/theses/docs/32211131524721.pdf.
Pełny tekst źródłaGrieser, Diane R. "string specialists' and non-string specialists' content knowledge and pedagogical knowledge of string-specific techniques in the intermediate strings class". Thesis, Boston University, 2014. https://hdl.handle.net/2144/11004.
Pełny tekst źródłaThis study examines the pedagogical content knowledge of music teachers who teach in or out of their field of expertise. The primary goal of this study was to observe string specialists' and non-string specialists' content knowledge, pedagogical knowledge, and the instructional strategies used to teach vibrato, shifting, and spiccato bowing technique in an intermediate string class. The study provided an in-depth understanding of string specialists' and non-string specialists' (a) content knowledge of vibrato, shifting, and spiccato bowing; (b) content and pedagogical knowledge to teach vibrato, shifting, and spiccato bowing technique; and (c) how pedagogical content knowledge is used to teach vibrato, shifting, and spiccato bowing technique. A multiple case study design was used to examine how pedagogical content knowledge was used by string specialists and non-string specialists to teach string-specific technique. A purposeful sample of 6 cases was selected for the study. String specialists and non-string specialists were purposefully chosen to understand how pedagogical knowledge is used to teach string-specific technique. In order to perform a cross-case analysis, similar cases (e.g., location, level, program size) were chosen. Data were collected through observations of rehearsals and interviews with string specialists and non-string specialists. Each participant was observed teaching three rehearsals, and three interviews were conducted with each participant. Through the coding process, emergent themes were explored to provide detailed insight into the pedagogical and content knowledge of string specialists and non-string specialists. Interview transcripts were coded using WEFT QDA 1.01 software (Fenton, 2006). The findings suggest that non-string specialists in this study have a limited understanding of the fundamental general principles for vibrato, shifting, and spiccato bowing technique. The non-string specialists' content knowledge of vibrato, shifting, and spiccato bowing had more misconceptions, more misunderstandings, and a less organized understanding of the content when compared to string specialists. Additionally, non-string specialists with limited content knowledge chose less challenging instructional strategies than string specialists. This research will help to inform the string profession regarding the importance of string-specific content knowledge and pedagogical strategies, and assist non-string specialists who teach string classes in better understanding the knowledge and approaches they might presently be lacking.
Harnish, Robert George. "The statistical properties of random surfaces". Thesis, University of Oxford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.257940.
Pełny tekst źródłaMitchell, D. G. "Strings in cosmology". Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/47184.
Pełny tekst źródłaVicedo, Benoît. "Finite-g strings". Thesis, University of Cambridge, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.612467.
Pełny tekst źródłaWentworth, Hillary B. "Something like strings". View electronic thesis, 2008. http://dl.uncw.edu/etd/2008-1/rp/wentworthh/hillarywentworth.pdf.
Pełny tekst źródłaGörlich, Lars. "N = 1 and non-supersymmetric open string theories in six and four space-time dimensions". Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2003. http://dx.doi.org/10.18452/14978.
Pełny tekst źródłaThis thesis contains an introductory chapter on orbifolds. Besides rudimentary basics we discuss more advanced topics like discrete torsion and asymmetric orbifold groups. As examples we investigate torus compactifications and an asymmetric T^4/Z(3)^L x Z(3)^R orbifold. The following chapter explains the foundations of orientifolds, including open strings with Chan-Paton degrees of freedom. Chapters 4-7 present own research. In chapter 4 we quantize open strings with linear boundary conditions, as they show up in electro-magnetic fields. We quantize the zero- and momentum-modes for toroidal compactifications, too. As an application we calculate the commutator of the coordinate fields in the case of general constant Neveu-Schwarz U(1)-field strengths. Thereby we confirm previous results on non-commutativity of open string theories in Neveu-Schwarz backgrounds. Chapter 5 reviews the results of a former publication [1] on asymmetric orientifolds, supplemented by some recent insights in connection with the preceeding chapter. Chapter 6 is a summary of [2]. In this publication we investigated to what extend one can build phenomenologically interesting models from toroidal orientifolds. By turning on magnetic fluxes on D9-branes we induce chiral fermions. Most calculations are performed in an (equivalent) T-dual picture. Here the number of chiral fermions is given by the topological intersection number of D-branes. In orientifolds of toroidal compactifications one obtains either non-chiral or non-supersymmetric orientifold solutions. However both properties can be reconciled in orientifolds that are obtained from specific supersymmetric orbifold compactifications. In chapter 7 we present the "sigma Omega"-Orientifold on a T^6/Z(4) orbifold. As a very attractive example we investigate a supersymmetric U(4) x U(2)^3_L x U(2)^3_R model that is broken to an MSSM-like model by switching on suitable background fields in the low energy effective action. This chapter is based on our publication [3]. The thesis is supplemented by an appendix with formulas applied in the text, as well as proofs to two theorems that were used as well.
Vanchurin, Vitaly. "Evolution of cosmic strings /". Thesis, Connect to Dissertations & Theses @ Tufts University, 2005.
Znajdź pełny tekst źródłaAdviser: Alexander Vilenkin. Submitted to the Dept. of Physics and Astronomy. Includes bibliographical references (leaf 99). Access restricted to members of the Tufts University community. Also available via the World Wide Web;
Earnshaw, Michael Andrew. "Cosmic strings and baryogenesis". Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321324.
Pełny tekst źródłaJames, Margaret Elizabeth Rose. "Electroweak strings and sphalerons". Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320060.
Pełny tekst źródłaHindmarsh, Mark Bernard. "Cosmic strings and beads". Thesis, Imperial College London, 1986. http://hdl.handle.net/10044/1/38034.
Pełny tekst źródłaRiveros, Jaeger Cristian. "Repairing strings and trees". Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:012d384f-d1d0-471b-ae6e-bbf337892680.
Pełny tekst źródłaClifford, Raphael. "Indexed strings for large scale genomic analysis". Thesis, Imperial College London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268368.
Pełny tekst źródłaHollowood, Timothy James. "Twisted strings, vertex operators and algebras". Thesis, Durham University, 1988. http://etheses.dur.ac.uk/6424/.
Pełny tekst źródłaPankiewicz, Ari. "Strings in plane wave backgrounds". Doctoral thesis, [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=968799981.
Pełny tekst źródłaJünemann, Klaus. "Symmetrien des N=2 Strings". [S.l. : s.n.], 1999. http://deposit.ddb.de/cgi-bin/dokserv?idn=956853765.
Pełny tekst źródłaHecht, Michael. "Effective actions and topological strings". Diss., lmu, 2011. http://nbn-resolving.de/urn:nbn:de:bvb:19-135759.
Pełny tekst źródłaOrloff, Jean. "Hot fundamental strings and cosmology". Doctoral thesis, Universite Libre de Bruxelles, 1991. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/213025.
Pełny tekst źródłaSiemens, Xavier. "Gravitational waves and cosmic strings /". Thesis, Connect to Dissertations & Theses @ Tufts University, 2002.
Znajdź pełny tekst źródłaAdviser: Alexander Vilenkin. Submitted to the Dept. of Physics. Includes bibliographical references (leaves 95-98). Access restricted to members of the Tufts University community. Also available via the World Wide Web;
Ilyenko, Kostyantyn. "Twistor description of null strings". Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301181.
Pełny tekst źródłaSkliros, Dimitri P. "Vertex operators for cosmic strings". Thesis, University of Sussex, 2011. http://sro.sussex.ac.uk/id/eprint/48134/.
Pełny tekst źródłaHANSSON, PER. "Braided Body, Strings That Move". Thesis, Högskolan i Borås, Institutionen Textilhögskolan, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-18104.
Pełny tekst źródłaProgram: Modedesignutbildningen
Wu, Jiun-Huei Proty. "Cosmological perturbations from cosmic strings". Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624542.
Pełny tekst źródłaKapitaniak, Marcin. "Nonlinear dynamics of drill-strings". Thesis, University of Aberdeen, 2015. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=227960.
Pełny tekst źródłaSetterqvist, Eric. "Taut Strings and Real Interpolation". Doctoral thesis, Linköpings universitet, Matematik och tillämpad matematik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-132421.
Pełny tekst źródłaLize, Matheus Loss. "Scattering amplitudes using twistor strings". São Paulo, 2017. http://hdl.handle.net/11449/154417.
Pełny tekst źródłaBanca: Andrey Yuryevich Mikhaylov
Banca: Diego Trancanelli
Resumo: Neste trabalho revisamos as amplitudes de MHV no contexto da teoria de super-Yang-Mills. Nós estudamos as simetrias das amplitudes de MHV no espaço de twistors como uma motivação para introduzir a teoria de cordas com twistors . A teoria de cordas com twistors feita por Nathan Berkovits [3] é revisada e uma fórmula geral é dada para calcular amplitudes de espalhamento com n gluons. No final, a partir desta fórmula deduzimos a amplitude de MHV
Abstract In this work we review the maximal helicity violating (MHV) scattering amplitude in the context of super-Yang-Mills theory. We study the symmetries of the MHV amplitude in the twistor space as a motivation to introduce the twistor string theory. The twistor string action introduced by Nathan Berkovits [3] is reviewed and also a general formula is given for the scattering amplitude with n gluons. In the end, the MHV amplitude is derived from this formula
Mestre
Sjödin, Robert. "Cosmic strings in general relativity". Thesis, University of Southampton, 2001. https://eprints.soton.ac.uk/50619/.
Pełny tekst źródłaKlotz, Anthony. "Spontaneous Knotting of Agitated Strings". VCU Scholars Compass, 2009. http://scholarscompass.vcu.edu/etd/1823.
Pełny tekst źródłaDuplessis, Francis. "Structure formation from cosmic strings". Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=119586.
Pełny tekst źródłaL'intérêt pour la recherche de cordes cosmiques c'est récemment renouvelé avec l'arrivée de nouvelles technologies permettant d'étudier la cosmologie avec grande précision. Dans cette thèse, nous discutons de la possibilité d'observer ces cordes cosmiques par leur effet sur les structures à grande échelle de l'univers. Nous présentons le savoir standard associé à la formation de structure causée par des fluctuations primordiales dans la densité de matière. Par la suite, nous expliquons la notion de cordes cosmiques et leur effet catalyseur sur la croissance de structure. Nous discutons également des travaux antérieurs qui ont été effectués sur les structures former par les cordes cosmiques bouclées. Ces travaux démontrent que ces structures peuvent potentiellement générer des étoiles très tôt dans l'histoire de l'univers, cela causerait des effets observables. Finalement, nous donnons une description quantitative des fluctuations de densité non-linéaire causée dans le sillage de longues cordes cosmiques. Spécifiquement, nous calculons la distribution des halos de matière noire. Ces halos posséderaient de fortes corrélations spatial qui devrait avoir survécues jusqu'à aujourd'hui. Nous discutons aussi des obstacles, dûs à leurs petites masses et aux dynamiques complexes de leur formation, auxquels nous devrons surmonter en essayant de détecter les signaux de ces halos.
Prudenziati, Andrea. "Topics in Open Topological Strings". Doctoral thesis, SISSA, 2010. http://hdl.handle.net/20.500.11767/4136.
Pełny tekst źródłaVazquez-Cruz, Alfredo. "Gravitational properties of quantum bosonic strings". Thesis, University of Sussex, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361405.
Pełny tekst źródłaPlayle, Samuel Rhys. "Gauge theory effective actions from open strings". Thesis, Queen Mary, University of London, 2014. http://qmro.qmul.ac.uk/xmlui/handle/123456789/8847.
Pełny tekst źródłaMcBride, Michael A. (Michael Anthony). "The Warp and Weft of Fabric: A Composition for Strings". Thesis, University of North Texas, 1999. https://digital.library.unt.edu/ark:/67531/metadc278386/.
Pełny tekst źródłaHedlund, Anna Maria. "Stripped Says to Stand Strong : Christina Aguilera's Voice and Feminist Narratology". Thesis, Halmstad University, School of Humanities (HUM), 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-125.
Pełny tekst źródłaThroughout history women have been subject to oppression by patriarchal society.
However, there have always been those who have tried to rise against it. This study will shed light upon one example: a female artist who personally defies the patriarchal norms at the same time as her music encourages others to do the same. The musician in question is Christina Aguilera, and the album studied is Stripped.
What this study shows is that Stripped can be read as a feminist statement. The lyrics deal with two main themes: patriarchal society’s objectification and oppression of women, and the struggles of love and relationships. What these two themes have in common is that they both encourage women to stand their ground and believe in themselves.
However, the lyrics on the album also suggest that Aguilera is aware of the fact that her message will not suit everyone. She knows that she works within an industry whose goal is to make money out of its artists, and therefore she has to keep repeating like a mantra to herself and to others that she, and her music, is not just a product of this industry. The message her music brings actually matters.
To come to this conclusion I have examined Aguilera’s lyrics in terms of what messages they bring and who their narratees might be, all in accordance with feminist narratology. Secondary sources from the fields of popular music studies, media studies and gender studies as well as interviews with and about Aguilera and biographies have been consulted.
Losi, Manuel. "Spiky strings and the AdS/CFT correspondence". Thesis, University of Cambridge, 2011. https://www.repository.cam.ac.uk/handle/1810/240629.
Pełny tekst źródłaYang, Benjamin H. (Benjamin Hoh). "A Study of the Relationship Between Motive and Structure in Brahms's op. 51 String Quartets". Thesis, University of North Texas, 1989. https://digital.library.unt.edu/ark:/67531/metadc332309/.
Pełny tekst źródłaGoodband, Michael James. "Perturbations about topological defects". Thesis, University of Sussex, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336276.
Pełny tekst źródłaNiemeyer, Bernd. "N=2 strings und selbstduale Feldtheorien". [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=962822698.
Pełny tekst źródłaKörs, Boris. "Open strings in magnetic background fields". [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=962714895.
Pełny tekst źródłaHendy, Shaun. "Cosmic strings in black hole spacetimes". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0007/NQ29046.pdf.
Pełny tekst źródłaOliveira, Luiz Eduardo Soares. "Automatic recognition of handwritten numerical strings". Mémoire, Montréal : École de technologie supérieure, 2003. http://wwwlib.umi.com/cr/etsmtl/fullcit?pNQ85289.
Pełny tekst źródła"Thesis presented to the École de technologie supérieure in partial fulfillment of the thesis requirement for the degree of philosophiae doctor in engineering". La numérotation de cet ouvrage est erronée. Bibliogr.: f. [149]-163. Également disponible en version électronique.
Bougourzi, M. Abdelhamid. "Heterotic strings compactified on asymmetric orbifolds". Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61979.
Pełny tekst źródłaMistry, Bina. "Braneworld black holes and black strings". Thesis, Durham University, 2008. http://etheses.dur.ac.uk/2242/.
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