Academic literature on the topic 'Tensor of elasticity'

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Dissertations / Theses on the topic "Tensor of elasticity"

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Deymier, P. A., and K. Runge. "Non-separable states in a bipartite elastic system." AMER INST PHYSICS, 2017. http://hdl.handle.net/10150/624037.

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We consider two one-dimensional harmonic chains coupled along their length via linear springs. Casting the elastic wave equation for this system in a Dirac-like form reveals a directional representation. The elastic band structure, in a spectral representation, is constituted of two branches corresponding to symmetric and antisymmetric modes. In the directional representation, the antisymmetric states of the elastic waves possess a plane wave orbital part and a 4x1 spinor part. Two of the components of the spinor part of the wave function relate to the amplitude of the forward component of wav
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2

Song, Min Jae. "Direct tensor expression by Eulerian approach for constitutive relations based on strain invariants in transversely isotropic green elasticity - finite extension and torsion." [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1667.

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Blanc, Katy. "Description de contenu vidéo : mouvements et élasticité temporelle." Thesis, Université Côte d'Azur (ComUE), 2018. http://www.theses.fr/2018AZUR4212/document.

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La reconnaissance en vidéo atteint de meilleures performances ces dernières années, notamment grâce à l'amélioration des réseaux de neurones profonds sur les images. Pourtant l'explosion des taux de reconnaissance en images ne s'est pas directement répercuté sur les taux en reconnaissance vidéo. Cela est dû à cette dimension supplémentaire qu'est le temps et dont il est encore difficile d'extraire une description robuste. Les réseaux de neurones récurrents introduisent une temporalité mais ils ont une mémoire limitée dans le temps. Les méthodes de description vidéo de l'état de l'art gèrent gé
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Chemello, Emiliano. "Avaliação de diferentes potenciais interatômicos no cálculo do tensor de elasticidade do tungstato de zircônio." reponame:Repositório Institucional da UCS, 2009. https://repositorio.ucs.br/handle/11338/413.

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O Tungstato de Zircônio (ZrW2O8) é um material que exibe Expansão Térmica Negativa (ETN), isotrópica em um amplo intervalo de temperatura (0,3 a 1050 K). Apesar de amplamente estudado, existem controvérsias acerca dos mecanismos microscópicos responsáveis por este comportamento. A fase cúbica deste composto, denominada a-ZrW2O8, já foi motivo de estudo através de simulações computacionais utilizando Potenciais Interatômicos (PI) e Dinâmica de Rede na Aproximação Quasi-Harmônica (DRQH). Nos dois PI distintos propostos na literatura conseguiu-se reproduzir a ETN da a-ZrW2O8, mas não a dependênci
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5

Gao, Liang. "Ultrasound Elasticity Imaging of Human Posterior Tibial Tendon." Diss., The University of Arizona, 2014. http://hdl.handle.net/10150/338897.

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Posterior tibial tendon dysfunction (PTTD) is a common degenerative condition leading to a severe impairment of gait. There is currently no effective method to determine whether a patient with advanced PTTD would benefit from several months of bracing and physical therapy or ultimately require surgery. Tendon degeneration is closely associated with irreversible degradation of its collagen structure, leading to changes to its mechanical properties. If these properties could be monitored in vivo, it could be used to quantify the severity of tendonosis and help determine the appropriate treatment
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Lichtwark, Glen Anthony. "The role of muscle tendon unit elasticity in real life activities." Thesis, University College London (University of London), 2005. http://discovery.ucl.ac.uk/1444942/.

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The interaction of a muscle and associated tendon during dynamic activities such as locomotion is critical for both force production and economical movement. It is generally assumed that, under sub-maximal conditions, muscle activation patterns are optimised to achieve maximum efficiency of work. Here, I explore the interaction between the contractile component (CC) and the elastic tendinous tissue to understand the relationship between a muscle's power output and efficiency. In this thesis, I examine the interaction of the CE and the elastic tendinous tissue and its effect on power output and
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VALLEJOS, CASTRO GABRIELA. "A Tension Please." Thesis, Högskolan i Borås, Institutionen Textilhögskolan, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-18107.

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This degree work is about the exploration of the stretch in textile materials by using cartridge pleats as a method to create weight and thereby create tension. Through research in materials and stretch fabrics versus heavier woven textiles the work strives for expressions in movement as well as new ways of combining lightness and weight.<br>Program: Modedesignutbildningen
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Günnel, Andreas, and Roland Herzog. "Optimal Control Problems in Finite-Strain Elasticity by Inner Pressure and Fiber Tension." Universitätsbibliothek Chemnitz, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-209295.

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Optimal control problems for finite-strain elasticity are considered. An inner pressure or an inner fiber tension is acting as a driving force. Such internal forces are typical, for instance, for the motion of heliotropic plants, and for muscle tissue. Non-standard objective functions relevant for elasticity problems are introduced. Optimality conditions are derived on a formal basis, and a limited-memory quasi-Newton algorithm for their solution is formulated in function space. Numerical experiments confirm the expected mesh-independent performance.
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9

Romani, Marcelo. "A influência do controle da tensão do elastano durante o processo produtivo nas propriedades elásticas dos tecidos com elastano para fitness." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/100/100133/tde-27092016-104157/.

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O objetivo deste estudo é verificar qual é a efetiva contribuição prática que o monitoramento da tensão do elastano durante o processo produtivo de tecidos destinados à moda esportiva, terá sobre as características de gramatura e elasticidade, esta última traduzida como força de recuperação do tecido, na tentativa de tornar o processo mais eficiente no atendimento dos anseios dos clientes em ter o \"handle\" ou \"mão\" do tecido apresentando elevado \"power\" ou resistência ao alongamento, avaliação subjetiva muito utilizada nas confecções de artigos para fitness e moda esportiva em geral e qu
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10

Du, Wenwen. "Material Tensors and Pseudotensors of Weakly-Textured Polycrystals with Orientation Measure Defined on the Orthogonal Group." UKnowledge, 2014. http://uknowledge.uky.edu/math_etds/22.

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Material properties of polycrystalline aggregates should manifest the influence of crystallographic texture as defined by the orientation distribution function (ODF). A representation theorem on material tensors of weakly-textured polycrystals was established by Man and Huang (2012), by which a given material tensor can be expressed as a linear combination of an orthonormal set of irreducible basis tensors, with the components given explicitly in terms of texture coefficients and a number of undetermined material parameters. Man and Huang's theorem is based on the classical assumption in textu
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