Bibliografías temáticas / Anisotropic liquids

Literatura académica sobre el tema "Anisotropic liquids"

Autor: Grafiati
Publicado: 6 de septiembre de 2023

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Artículos de revistas sobre el tema "Anisotropic liquids"

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Hashimoto, Akihiro, Yuta Murakami y Akihisa Koga. "Majorana excitations in the anisotropic Kitaev model with an ordered-flux structure". Journal of Physics: Conference Series 2164, n.º 1 (1 de marzo de 2022): 012028. http://dx.doi.org/10.1088/1742-6596/2164/1/012028.

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Abstract We investigate the anisotropic S = 1/2 Kitaev model on the honeycomb lattice with the ordered-flux structure. By diagonalizing the Majorana Hamiltonian for the flux configuration, we find two distinct gapped quantum spin liquids. One of them is the gapped state realized in the large anisotropic case, where low energy properties are described by the toric code. On the other hand, when the system has small anisotropy, the other gapped quantum spin liquid is stabilized by the ordered-flux configuration. Since these two gapped quantum spin liquids are separated by the gapless region, these are not adiabatically connected to each other.
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Liszka, Karol, Andrzej Grzybowski, Kajetan Koperwas y Marian Paluch. "Density Scaling of Translational and Rotational Molecular Dynamics in a Simple Ellipsoidal Model near the Glass Transition". International Journal of Molecular Sciences 23, n.º 9 (20 de abril de 2022): 4546. http://dx.doi.org/10.3390/ijms23094546.

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In this paper, we show that a simple anisotropic model of supercooled liquid properly reflects some density scaling properties observed for experimental data, contrary to many previous results obtained from isotropic models. We employ a well-known Gay–Berne model earlier parametrized to achieve a supercooling and glass transition at zero pressure to find the point of glass transition and explore volumetric and dynamic properties in the supercooled liquid state at elevated pressure. We focus on dynamic scaling properties of the anisotropic model of supercooled liquid to gain a better insight into the grounds for the density scaling idea that bears hallmarks of universality, as follows from plenty of experimental data collected near the glass transition for different dynamic quantities. As a result, the most appropriate values of the scaling exponent γ are established as invariants for a given anisotropy aspect ratio to successfully scale both the translational and rotational relaxation times considered as single variable functions of densityγ/temperature. These scaling exponent values are determined based on the density scaling criterion and differ from those obtained in other ways, such as the virial–potential energy correlation and the equation of state derived from the effective short-range intermolecular potential, which is qualitatively in accordance with the results yielded from experimental data analyses. Our findings strongly suggest that there is a deep need to employ anisotropic models in the study of glass transition and supercooled liquids instead of the isotropic ones very commonly exploited in molecular dynamics simulations of supercooled liquids over the last decades.
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Jiang, Hong, Leo Svenningsson y Daniel Topgaard. "Multidimensional encoding of restricted and anisotropic diffusion by double rotation of the q vector". Magnetic Resonance 4, n.º 1 (15 de marzo de 2023): 73–85. http://dx.doi.org/10.5194/mr-4-73-2023.

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Abstract. Diffusion NMR and MRI methods building on the classic pulsed gradient spin-echo sequence are sensitive to many aspects of translational motion, including time and frequency dependence (“restriction”), anisotropy, and flow, leading to ambiguities when interpreting experimental data from complex heterogeneous materials such as living biological tissues. While the oscillating gradient technique specifically targets frequency dependence and permits control of the sensitivity to flow, tensor-valued encoding enables investigations of anisotropy in orientationally disordered materials. Here, we propose a simple scheme derived from the “double-rotation” technique in solid-state NMR to generate a family of modulated gradient waveforms allowing for comprehensive exploration of the 2D frequency–anisotropy space and convenient investigation of both restricted and anisotropic diffusion with a single multidimensional acquisition protocol, thereby combining the desirable characteristics of the oscillating gradient and tensor-valued encoding techniques. The method is demonstrated by measuring multicomponent isotropic Gaussian diffusion in simple liquids, anisotropic Gaussian diffusion in a polydomain lyotropic liquid crystal, and restricted diffusion in a yeast cell sediment.
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Yu, Miao, Wenjie Wu, Yayun Ding, Qian Liu, Feng Ren, Zhenyu Zhang y Xiang Zhou. "A Monte Carlo method for Rayleigh scattering in liquid detectors". Review of Scientific Instruments 93, n.º 11 (1 de noviembre de 2022): 113102. http://dx.doi.org/10.1063/5.0119224.

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A new Monte Carlo method has been implemented to describe the angular and polarization distributions of anisotropic liquids, such as water and linear alkylbenzene (LAB), by considering orientational fluctuations of polarizability tensors. The scattered light of anisotropic liquids is depolarized with an angular distribution of 1 + (1 − ρ v)/(1 + 3 ρ v) cos2 θ, which is modified by the depolarization ratio ρ v. A standalone experiment has validated the simulation results of LAB. The new method can provide more accurate knowledge on light propagation in large liquid detectors, which is beneficial to the development of reconstruction for detectors.
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Sakai, Tôru, Hiroki Nakano, Rito Furuchi y Kiyomi Okamoto. "Spin nematic liquid of the S = 1/2 distorted diamond spin chain in magnetic field". AIP Advances 13, n.º 1 (1 de enero de 2023): 015313. http://dx.doi.org/10.1063/9.0000401.

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The magnetization process of the S = 1/2 distorted diamond spin chain with anisotropic ferromagnetic interaction is investigated using numerical diagonalization of finite-size clusters. It is found that the spin nematic and SDW Tomonaga-Luttinger liquids can appear for sufficiently large easy axis anisotropy.
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Shtifanyuk, P. P., A. N. Shramkov, S. Ye Yakovenko y A. Geiger. "Additive anisotropic interactions in molecular liquids and liquid crystals". Physica A: Statistical Mechanics and its Applications 195, n.º 3-4 (mayo de 1993): 398–416. http://dx.doi.org/10.1016/0378-4371(93)90166-2.

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Khudozhitkov, Alexander E., Peter Stange, Anne-Marie Bonsa, Viviane Overbeck, Andreas Appelhagen, Alexander G. Stepanov, Daniil I. Kolokolov, Dietmar Paschek y Ralf Ludwig. "Dynamical heterogeneities in ionic liquids as revealed from deuteron NMR". Chemical Communications 54, n.º 25 (2018): 3098–101. http://dx.doi.org/10.1039/c7cc09440j.

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Deuteron NMR spectroscopy is a suitable method to study dynamical heterogeneities in protic ionic liquids. In the 2H spectra of the protic ionic liquid [TEA][OTf] we observe anisotropic and isotropic signals at the same time.
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Kröger, Martin. "Models for Polymeric and Anisotropic Liquids". Applied Rheology 16, n.º 1 (1 de febrero de 2006): 12–13. http://dx.doi.org/10.1515/arh-2006-0025.

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Volkov, V. S. y V. G. Kulichikhin. "Macromolecular dynamics in anisotropic viscoelastic liquids". Macromolecular Symposia 81, n.º 1 (abril de 1994): 45–53. http://dx.doi.org/10.1002/masy.19940810106.

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Aoki, Keiko M., Makoto Yoneya y Hiroshi Yokoyama. "Molecular dynamic simulation methods for anisotropic liquids". Journal of Chemical Physics 120, n.º 12 (22 de marzo de 2004): 5576–84. http://dx.doi.org/10.1063/1.1648633.

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Tesis sobre el tema "Anisotropic liquids"

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Loussert, Charles. "Mise en forme topologique : lumière et cristaux liquides". Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0325/document.

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Ce travail de thèse consiste en l’étude de la mise en forme topologique de la lumière et de la matière et s’articule autour de deux axes de recherche. Le premier concerne la mise en forme topologique de la lumière à partir d’interfaces spin-orbite à base de cristaux liquides. En l’occurrence, nous montrons dans ce manuscrit que différents systèmes de défauts topologiques naturels permettent de générer des vortex optiques par interaction spin-orbite de la lumière, de manière efficace, accordable en longueur d’onde et reconfigurable en temps réel et donnant accès à des charges topologiques diverses. Tout ceci nous a permis de travailler à des échelles microscopiques et de manière spatialement contrôlée. Ces avancées ouvrent la voie au contrôle de l’état orbital de la lumière sur une large bande spectrale.Le second axe concerne la mise en forme topologique d’un film de cristal liquide cholestérique dans le cadre du stockage de l’information de nature topologique. Nous avons démontré la possibilité de générer une grande diversité de défauts topologiques métastables, de manière contrôlée et reconfigurable, à la fois dans le temps et dans l’espace. Nous avons développé une approche permettant de réduire drastiquement le coût énergétique d’écriture de ces défauts. Nous avons également montré qu’il était possible d’obtenir un nouveau type de mémoire réinscriptible contrôlé par le degré de liberté «spin» du photon
The enclosed work deals with the study of the topological shaping of light and matter and will bedivided into two categories of research. The first focuses on the topological shaping of light from liquid-crystal based spin-orbit interfaces. In particular, we show in this manuscript, that different systems based on the use of natural topological defects behave as highly efficient natural optical spin-orbit encoders, for distinct topological charges, at the micron scale and with spatial control.The operating wave length and operation mode of such interfaces can be tuned in real-time using low voltage electric fields. This breakthrough opens the path to the ultra-broadband control of the light’sorbital state. The second category concerns the topological shaping of a cholesteric liquid crystal film in context of mass data storage. We show the potential to generate metastable topological mi-crostructures in a controlled and reconfigurable way, both in time and space and with a low energy cost. We also demonstrated a new, unique type of rewritable memory, controlled by the«spin»ofthe laser-generated incident photon
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Simmonds, Paul Stuart John. "Theoretical studies of anisotropic fluids". Thesis, University of Southampton, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314781.

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Nicholson, Timothy Michael. "Anisotropic structure in liquid crystalline polymers". Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293821.

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Leite, Rubim Rafael. "Graphene oxide sheets confined within anisotropic fluid matrices". Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0209/document.

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Dès sa découverte, le graphène oxydé (GO), le plus accessible des précurseurs du graphène, a été largement utilisé pour des applications en science et technologie. La motivation de ce travail est d'étudier, d'un point de vue fondamental, le couplage entre des bicouches amphiphiles auto-associées (lesquelles peuvent être vues comme une matrice anisotrope formée d'objets bidimensionnels) et un objet lui-même bidimensionnel, en l'occurrence le feuillet de graphène oxydé, quand ils sont dispersés dans un solvant commun. La compétition entre les élasticités intrinsèques des bicouches et des feuillets de GO, ainsi que les interactions directes bicouche-bicouche, bicouche-GO et GO-GO, permet d'envisager un riche polymorphisme en fonction de la composition du système. Après avoir développé une procédure destinée à contrôler, dans une gamme étendue de teneur en GO, le système binaire GO-eau, le domaine confiné des dispersions aqueuses de GO a été exploré et, par la suite, le diagramme de phases ternaire a été construit. Les systèmes obtenus ont été caractérisés par des techniques comme la microscopie optique et la diffusion du rayonnement (diffusion dynamique de la lumière et diffusion des rayons-X aux petits angles). Les propriétés élastiques et thermodynamiques ont été décrites par l'application de modèles initialement conçus pour les phases lamellaires à deux constituants et adaptés dans le cadre de cette étude
Since the discovery of graphene oxide (GO), the most accessible of the precursors of graphene, this material has been widely studied for applications in science and technology. The motivation of this work is to study with a fundamental perspective the coupling between amphiphilic bilayers, which can be seen as an anisotropic matrix formed of two-dimensional objects, and another two-dimensional object, namely the graphene oxide sheet when they are dispersed in a common solvent. The competition between the intrinsic elasticities of the bilayers and GO sheets, as well as between direct bilayer-bilayer, bilayer-GO and GO-GO interactions allows us to envisage a rich polymorphism, depending on the composition of the system. Following the development of a dedicated procedure for controlling in an extended range of GO content the binary GO-water system, the confined domain of aqueous GO dispersions was first investigated, and the ternary phase diagram then constructed. The obtained systems have been characterised, using techniques such as optical microscopy, light and x-ray scattering. Elastic and thermodynamic properties have been described by applying, and adapting to the scope of this study, models for two-component lamellar stacks
Desde sua descoberta, o grafeno oxidado (GO), o mais acessível dos precursores do grafeno,tem sido amplamente utilizado para aplicações na ciéncia e tecnologia. A motivação destetrabalho é de estudar, de um ponto de vista fundamental, o acoplamento entre bicamadas anfifílicas auto-organizadas (que podem ser vistas como uma matriz anisotrópica formada por objetos bidimensionais) e um objeto ele mesmo bidimensional, neste caso a folha de óxido de grafeno, quando estão dispersados em um solvente comum.A competição entre as elasticidades intrínsecas das bicamas e das folhas de GO, assimcomo as interaçãoes diretas bicamada-bicamada, bicamada-GO e GO-GO, permitem esperar um rico polimorfismo em função da composição do sistema. Seguindo o desenvolvimento de um procedimento destinado ao controle, em um intervalo extendido da quantidade de GO, o sistema binário GO-água, o domínio confinado de dispersões aquosas de GO foi explorado e, em seguida, o diagrama de fases ternário contruído.Os sistemas obtidos foram caracterizados por t_ecnicas como microscopia ótica, espalhamento dinâmico de luz e espalhamento de raios-x à baixos ângulos. As propriedadeselásticas e termodinâmicas foram descritas pela aplicação de modelos inicialmente concebidos para fases lamelares à dois constituintes e adaptados ao escopo deste estudo
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Mondiot, Frédéric. "Comportement de particules colloïdales dans des solvants nématiques : influence de la forme et de la taille". Phd thesis, Bordeaux 1, 2011. http://tel.archives-ouvertes.fr/tel-00657747.

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Ces travaux de thèse ont pour but d'étudier l'état de dispersion de particules colloïdales dans des cristaux liquides nématiques lyotropes. Ces solvants organisés sont constitués de micelles nanométriques anisotropes. Dans un premier temps, nous montrons qu'il est possible de réaliser des suspensions cinétiquement stables en jouant notamment sur la forme des inclusions micrométriques. Un modèle, développé dans le cadre de cette étude, permet de rendre compte de nos observations. Dans un second temps, nous nous intéressons à l'influence de la diminution de taille de particules sur l'état de dispersion du système. A l'échelle nanométrique, le mouvement brownien, anisotrope dans ce type de milieu, semble gouverner les phénomènes observés.
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Petit, Mohamed. "Etudes des propriétés électro-optiques, diélectriques et structurales d'un cristal liquide ferroélectrique stabilisé par un réseau polymère". Littoral, 2007. http://www.theses.fr/2007DUNK0186.

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Dans ce travail, nous avons entrepris l’étude de cellules ferroélectriques stabilisées par un réseau polymère, dont la structure en hélice a été préservée en choisissant un cristal liquide à faible pas hélicoïdale. La formation du réseau polymère est basée sur un processus d’auto-assemblage photo-induit et d’alignement d’entités monomères mésogènes photoréactives dispersées dans le solvant anisotrope qu’est le milieu cristal liquide, considéré comme élément de structuration du réseau. L’auto-structuration du réseau polymère, conjointement à des effets d’ancrage aux interfaces polymère/cristal liquide, sont en retour des éléments déterminants pour le comportement du cristal liquide stabilisé lorsqu’un champ électrique est appliqué. L’étude des propriétés électro-optiques et diélectriques des gels nous a permis de mettre en évidence que le réseau polymère anisotrope formé en phase SmC* joue un rôle stabilisateur non seulement de la structure en hélice de la phase héliélectrique, mais aussi de l’ordre orthogonal an phase SmA. Ce réseau anisotrope dispersé dans le volume de la cellule permet le contrôle de la réorientation sous champ électrique du cristal liquide. Nous avons montré que cet effet du réseau est intimement lié à sa structure fibrillaire et anisotrope interagissant fortement avec le cristal liquide grâce à des forces d’ancrage et élastique. Des approches théoriques qui tiennent compte de la structure et de la morphologie du réseau ont été développées et ont permis d’estimer l’ampleur du couplage réseau/cristal liquide , que l’on peut qualifier de « fort ». Ce couplage fort se traduit par l’augmentation de l’élasticité effective des gels
We report in this work the effect of an anisotropic polymer network formed from an achiral photo-reactive monomer in a short pitch chiral SmC* phase, on the coupling of liquid crystal molecules to applied electric field. The formation of the polymer network is based on a photo-induced self-structuring process and alignment of photo-reactive mesogenic monomers, initially dispersed in a SmC* liquid crystal matrix. This allows to a gel composite material. The self-structured network plays in turn a crucial role on the behaviour of the liquid crystal under external electric field. Experimental data, obtained from electro-optic and dielectric measurements, showed that the anisotropic polymer network stabilizes not only the helical structure of the ferroelectric SmC* phase, but also the orthogonal order of the paraelectric SmA phase. We have demonstrated this effect to be related to network morphology. AFM experiments have shown a fibrillar and anisotropic structure of the network. The experimental results were discussed in the framework of a simple phenomenological model, extended from the Landau model, including the bulk free energy arising from the liquid crystal/polymer anisotropic interaction, and the elastic free energy resulting from the anchoring of liquid crystal molecules at the polymer boundaries. The coupling parameter characterizing the liquid crystal/polymer interaction was evaluated as a function of polymer network density. This interaction can be qualified as “strong”, and results on the increase of the effective elasticity of the gels
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Geronimo, Luiz Alceu. "Medidas da anisotropia dielétrica de cristais líquidos nemáticos". Florianópolis, SC, 1985. https://repositorio.ufsc.br/handle/123456789/106255.

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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Florianópolis, 1985.
Made available in DSpace on 2013-12-05T19:53:23Z (GMT). No. of bitstreams: 1 239977.pdf: 1967977 bytes, checksum: 569c42ef2a8e7c0fa8e218ea3843e3f7 (MD5) Previous issue date: 1985
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Cruceanu, Florentin I. "AC-calorimetry and dielectric spectroscopy on anisotropic liquid crystal and aerosil dispersions". Worcester, Mass. : Worcester Polytechnic Institute, 2008. http://www.wpi.edu/Pubs/ETD/Available/etd-040908-143149/.

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Dissertation (Ph.D.)--Worcester Polytechnic Institute.
Keywords: phase transitions; quenched random disorder; liquid crystals; dielectric spectroscopy; calorimetry. Includes bibliographical references (leaves 78-83).
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Forrest, Richard. "Preparation of anisotropic microparticles and their behaviour at liquid interfaces". Thesis, University of Hull, 2012. http://hydra.hull.ac.uk/resources/hull:8606.

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Monolayers of solid particles at the liquid- fluid interface are of considerable interest in both academia and industry. Their behaviour during compression and expansion experiments in a Langmuir trough has important implications on particle stabilisation of foams and emulsions. This has been known for some time with regards to spherical particles. In this investigation, we have studied the role of non- spherical particles at the liquid- fluid interface. Particles have been fabricated using the technique of photolithography. The technique was modified in order to be able to apply it under normal laboratory conditions, thus making it more accessible for the fabrication of non- spherical particles of any size or shape. Flat plate- like particles with well controlled shape and size with disc, oval and rectangular geometry have been fabricated. Monolayers composed of such particles at both the air- water and oil- water interfaces exhibit important differences between each other and spherical particles. The geometry of the monolayers at the interface has been characterised, and preferential ordering of rectangular particles in domains consisting of side to side contacts has been discovered. A strong capillary attraction has been observed between the particles owing to the roughness and shape of the particles. It was found that during compression at the liquid- fluid interface, the surface pressure increases more slowly than that observed for spherical particles and this has been attributed to the tendency of the particles to undergo reorientation, tilting and flipping, the latter always occurred around the long axes of the particles. The thickness of the particles has significant implications on the stability of the monolayer; in addition the tendency for the particles to flip increases as the thickness of the particles is reduced. The non- spherical particles investigated here have been demonstrated to offer great potential as stabilisers of emulsion drops. The technique of photolithography has been utilised for the fabrication of Janus particles consisting of one face coated with metals, polyelectrolytes, silanes and colloidal particles.
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Timperley, Christine Ann. "Reflectance anisotropy spectroscopy of thermotropic liquid crystals". Thesis, University of Liverpool, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.428215.

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Libros sobre el tema "Anisotropic liquids"

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J, Wu Julian, Ting, T. C.-t. 1933-, Barnett David M y United States. Army Research Office. Mathematical Sciences Division., eds. Modern theory of anisotropic elasticity and applications. Philadelphia: Society for Industrial and Applied Mathematics, 1991.

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Elliott, Burnell E. y De Lange Cornelis A, eds. NMR of ordered liquids. Dordrecht: Kluwer Academic Publishers, 2003.

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Burnell, E. Elliott. NMR of Ordered Liquids. Dordrecht: Springer Netherlands, 2003.

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Kröger, Martin. Models for Polymeric and Anisotropic Liquids. Springer, 2010.

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Models for Polymeric and Anisotropic Liquids. Springer, 2005.

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Wu, Julian J. y T. C. Ting. Modern Theory of Anisotropic Elasticity and Applications (Proceedings in Applied Mathematics). Soc for Industrial & Applied Math, 1992.

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Capítulos de libros sobre el tema "Anisotropic liquids"

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de Lange, C. A. y E. E. Burnell. "Basics of NMR of Molecules in Uniaxial Anisotropic Environments". En NMR of Ordered Liquids, 5–26. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-0221-8_1.

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Marjanska, Malgorzata, Robert H. Havlin y Dimitris Sakellariou. "Coherent Averaging and Correlation of Anisotropic Spin Interactions in Oriented Molecules". En NMR of Ordered Liquids, 45–65. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-0221-8_3.

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Mathews, Manoj, Ammathnadu S. Achalkumar y Quan Li. "Self-assembled 1D Semiconductors: Liquid Crystalline Columnar Phase". En Anisotropic Nanomaterials, 241–87. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-18293-3_7.

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Lin, Tsung-Hsien, Chun-Wei Chen y Quan Li. "Self-Organized 3D Photonic Superstructure: Blue Phase Liquid Crystal". En Anisotropic Nanomaterials, 337–78. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-18293-3_9.

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Givargizov, E. I. "Growth of Whiskers from the Liquid Phase". En Highly Anisotropic Crystals, 230–51. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3709-3_3.

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Bisoyi, Hari Krishna y Quan Li. "Liquid Crystalline Anisotropic Nanoparticles: From Metallic and Semiconducting Nanoparticles to Carbon Nanomaterials". En Anisotropic Nanomaterials, 209–40. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-18293-3_6.

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Hess, Siegfried. "Flow Properties and Structure of Anisotropic Fluids Studied by Non-Equilibrium Molecular Dynamics, and Flow Properties of other Complex Fluids: Polymeric Liquids, Ferro-Fluids and Magneto-Rheological Fluids". En Advances in the Computer Simulatons of Liquid Crystals, 189–233. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4225-0_8.

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Hess, Siegfried. "Liquid Crystals and Other Anisotropic Fluids". En Tensors for Physics, 273–98. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-12787-3_15.

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Collings, Peter J. y John W. Goodby. "Nature’s Anisotropic Fluids – It’s All about Direction". En Introduction to Liquid Crystals, 59–94. [Second edition]. | [Boca Raton, Florida] : [CRC Press], [2019] | Revised edition of: Introduction to liquid crystals chemistry and physics / by Peter J. Collings and Michael Hird. [1997]: CRC Press, 2019. http://dx.doi.org/10.1201/9781315098340-3.

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Kim, Dae-Yoon, Namil Kim y Kwang-Un Jeong. "Anisotropic Liquid Crystal Networks from Reactive Mesogens". En Polymers and Polymeric Composites: A Reference Series, 1–22. Berlin, Heidelberg: Springer Berlin Heidelberg, 2019. http://dx.doi.org/10.1007/978-3-642-37179-0_57-1.

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Actas de conferencias sobre el tema "Anisotropic liquids"

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Arakelian, Sergei M., V. E. Drnoyan, M. N. Gerke y Tigran V. Galstian. "Laser-induced instabilities in anisotropic liquids". En Nonresonant Laser-Matter Interaction, editado por Vitali I. Konov y Mikhail N. Libenson. SPIE, 1997. http://dx.doi.org/10.1117/12.271694.

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Shmat'ko, Alexandr A., Eugene N. Odarenko y Alexey A. Vertiy. "Sensor-Polarimeter Based on Anisotropic Photonic Crystal for Solids and Liquids". En 2020 IEEE Ukrainian Microwave Week (UkrMW). IEEE, 2020. http://dx.doi.org/10.1109/ukrmw49653.2020.9252631.

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Kohles, N. y A. Laubereau. "Polarization Dependence of Picosecond CARS in Liquids". En International Conference on Ultrafast Phenomena. Washington, D.C.: Optica Publishing Group, 1986. http://dx.doi.org/10.1364/up.1986.wb4.

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We have performed a theoretical and experimental study of time resolved coherent Raman scattering under various polarization conditions. Three mechanisms are shown to contribute to the scattering signal in the general case: (i) scattering off the isotropic part of the resonant material excitation with vibrational dephasing time T2. (ii) scattering from a second, oriented component of the resonant material excitation with "anisotropic" time constant τan (iii) four wave mixing via the non-resonant part χNRof the third order susceptibility.
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Zhou, Jianying, He Z. Wang, Zhigang Cai, Xu G. Huang y Zhenxin Yu. "Optical pulse shaping by spectrally slicing stimulated light scattering generated in anisotropic molecular liquids". En OE/LASE'93: Optics, Electro-Optics, & Laser Applications in Science& Engineering, editado por Timothy R. Gosnell, Antoinette J. Taylor, Keith A. Nelson y Michael C. Downer. SPIE, 1993. http://dx.doi.org/10.1117/12.147052.

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Ehrich, Fredric F. "Observed Rotordynamic Phenomena in Aircraft Gas Turbine Development". En ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-48108.

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Observations, analysis and understanding of out-of-the-ordinary rotordynamic phenomena (including several instabilities and nonlinear responses) observed in aircraft gas turbine engines and other high-speed rotating machinery over the course of the author’s career in the design and development of aircraft gas turbine engines are described. Some observed phenomena were already widely recognized in the rotordynamic community such as: • Hysteretic whirl • The tip clearance effect on stability of turbomachinery rotors • Instability due to trapped liquids in the rotor • Hysteresis in the resonant peak amplitude • Effective suppression of rotor instability by anisotropy in the engine support structure Other observations were fairly new to the field of rotordynamics at that time they were observed but were identified as being new manifestations of vibration phenomena already familiar to vibration technologists in fields other than high-speed rotordynamics such as: • Sum-and-difference frequency response • Relaxation oscillations • Nonlinear effects of anisotropic clearance in roller and gas bearings At that time these phenomena were observed, the pressure for remediation of the problems they represented in the context of ongoing aircraft engine development resulted in intense attention and analysis which, in turn, often resulted in new insights, useful diagnoses, and effective remedial actions.
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Kiselev, Alexei D., Victor Y. Reshetnyak y Timothy J. Sluckin. "Generalized Mie theory of light scattering by annular anisotropic layer: anisotropy effects". En Eighth International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals, editado por Gertruda V. Klimusheva y Andrey G. Iljin. SPIE, 2001. http://dx.doi.org/10.1117/12.428315.

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Morel, Mauricio J., Marcel G. Clerc, Paulina Hidalgo y Jorge Vergara. "Anisotropic fronts close to the transition SmA-N*". En Liquid Crystals XXIV, editado por Iam Choon Khoo. SPIE, 2020. http://dx.doi.org/10.1117/12.2568989.

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Hashim, R., N. Halim, H. Hussain, Z. Jafaar, G. R. Luckhurst, Salvatore Romano y S. M. Zain. "Computer simulation studies of anisotropic systems XXVII: phase diagram for a nematic binary mixture". En Liquid Crystals, editado por Jolanta Rutkowska, Stanislaw J. Klosowicz, Jerzy Zielinski y Jozef Zmija. SPIE, 1998. http://dx.doi.org/10.1117/12.299968.

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Kolbina, G. F., I. N. Shtennikova y Natalia N. Makarova. "Optical anisotropy of linear and cyclolinear polyphenylsiloxanes in solution". En Liquid Crystals, editado por Marzena Tykarska, Roman S. Dabrowski y Jerzy Zielinski. SPIE, 1998. http://dx.doi.org/10.1117/12.301289.

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Kandlikar, Satish G. y William J. Grande. "Evolution of Microchannel Flow Passages: Thermohydraulic Performance and Fabrication Technology". En ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-32043.

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This paper provides a roadmap of development in the thermal and fabrication aspects of microchannels as applied in the microelectronics and other high heat-flux cooling applications. Microchannels are defined as flow passages that have hydraulic diameters in the range of 10 to 200 micrometers. The impetus for microchannel research was provided by the pioneering work of Tuckerman and Pease [1] at Stanford University in the early eighties. Since that time, this technology has received considerable attention in microelectronics and other major application areas, such as fuel cell systems and advanced heat sink designs. After reviewing the advancement in heat transfer technology from a historical perspective, advantages of using microchannels in high heat flux cooling applications is discussed, and research done on various aspects of microchannel heat exchanger performance is reviewed. Single-phase performance for liquids is expected to be still describable by the conventional equations; however the gas flow may be influenced by the rarefaction effects. Two-phase flow is another topic that is still under active research. The evolution of research into microchannel heat sinks has paralleled the advancements made in microfabrication technology. The earliest microchannels were built using anisotropic wet chemical etching techniques based on alkali solutions. While this method has been exploited successfully, it does impose certain restrictions on silicon wafer type and geometry. Recently, anisotropic dry etching processes have been developed that circumvent these restrictions. In addition, dry etching methods can be significantly faster and, from a manufacturing standpoint, create fewer contamination and waste treatment problems. Advances in fabrication technology will continue to fuel improvements in microchannel heat sink performance and cost for the foreseeable future. Some fabrication areas that may spur advances include new materials, high aspect ratio patterning techniques other than dry etching, active fluid flow elements, and micromolding.
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Informes sobre el tema "Anisotropic liquids"

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Lee, Mal Soon, Jinhui Tao, Katherine Koh y Kee Sung Han. The role of defects and solid/liquid interfacial interactions on controlling anisotropic growth of novel two-dimensional materials. Office of Scientific and Technical Information (OSTI), septiembre de 2021. http://dx.doi.org/10.2172/1983664.

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Gaffney, K. J., A. M. Lindenberg, J. Larsson, K. Sokolowski-Tinten, C. Blome, O. Synnergren, J. Sheppard et al. Observation of Structural Anisotropy and the Onset of Liquid-like Motion during the Non-thermal Melting of InSb. Office of Scientific and Technical Information (OSTI), septiembre de 2005. http://dx.doi.org/10.2172/878359.

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Allen, Jeffrey, Robert Moser, Zackery McClelland, Md Mohaiminul Islam y Ling Liu. Phase-field modeling of nonequilibrium solidification processes in additive manufacturing. Engineer Research and Development Center (U.S.), diciembre de 2021. http://dx.doi.org/10.21079/11681/42605.

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This project models dendrite growth during nonequilibrium solidification of binary alloys using the phase-field method (PFM). Understanding the dendrite formation processes is important because the microstructural features directly influence mechanical properties of the produced parts. An improved understanding of dendrite formation may inform design protocols to achieve optimized process parameters for controlled microstructures and enhanced properties of materials. To this end, this work implements a phase-field model to simulate directional solidification of binary alloys. For applications involving strong nonequilibrium effects, a modified antitrapping current model is incorporated to help eject solute into the liquid phase based on experimentally calibrated, velocity-dependent partitioning coefficient. Investigated allow systems include SCN, Si-As, and Ni-Nb. The SCN alloy is chosen to verify the computational method, and the other two are selected for a parametric study due to their different diffusion properties. The modified antitrapping current model is compared with the classical model in terms of predicted dendrite profiles, tip undercooling, and tip velocity. Solidification parameters—the cooling rate and the strength of anisotropy—are studied to reveal their influences on dendrite growth. Computational results demonstrate effectiveness of the PFM and the modified antitrapping current model in simulating rapid solidification with strong nonequilibrium at the interface.
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