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Dissertations / Theses on the topic 'Insulation model'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Ramadan, Hamzeh Hussein. "A numerical simulation model for a building with transparent insulation." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://spectrum.library.concordia.ca/585/1/MQ39470.pdf.

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Utilization of a transparent insulation material (TIM) in a solar collector wall has been proven to have a significant potential to reduce heating load in passive solar buildings. Transparent insulation transmits a high proportion of incident solar radiation onto a layer of thermal mass which subsequently slowly releases heat, thus reduces the requirement for heating throughout the day. Due to the high transmittance and convective suppression properties of the transparent material, the thermal resistance of the wall will be improved extensively with minimum losses of transmitted radiation. Th

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2

Sonehag, Christian. "Modeling of Ion Injection in Oil-Pressboard Insulation Systems." Thesis, Uppsala universitet, Fasta tillståndets elektronik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-177600.

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To make a High Voltage Direct Current (HVDC) transmission more energy efficient, the voltage of the system has to be increased. To allow for that the components of the system must be constructed to handle the increases AC and DC stresses that this leads to. One key component in such a transmission is the HVDC converter transformer. The insulation system of the transformer usually consists of oil and oil-impregnated pressboard. Modeling of the electric DC field in the insulation system is currently done with the ion drift diffusion model, which takes into account the transport and generation of

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3

Hägerbrand, Jonathan. "Measurements of resistivity in transformer insulation liquids." Thesis, Uppsala universitet, Institutionen för elektroteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-413804.

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This thesis focuses on measuring techniques and results of resistivity in four commercially available insulating transformer oils: mineral oil, ester oil and two isoparaffin oils. Two measuring techniques, the industrially used diagnostic system for electrical insulation IDA and the Labview implemented Triangular Method, are used for resistivity measurements and the techniques are compared, a correction algorithm to the triangular method is suggested. Dielectric properties of mineral & ester and isoparaffin A&B mixtures are investigated, it is experimentally shown that the transformer

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4

Bejjavarapu, Sai Munesh. "An experimental model for guided microwave backscattering from wet insulation in pipelines." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1414750414.

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5

Gholami, Mohammad Sadegh. "Development of innovative passive polyurethane foam with higher absorption and/or insulation performance." Thèse, Université de Sherbrooke, 2017. http://hdl.handle.net/11143/10532.

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Les mousses de polyuréthane (PU) hautement poreuses sont largement utilisées dans différentes industries pour dissiper l’énergie des ondes sonores et vibratoires. La propagation des ondes acoustiques dans ces matériaux poroélastiques est décrite à partir d’un ensemble de paramètres physiques connus sous le nom de paramètres de Biot (pour les matériaux isotropes, ils sont composés de 5 paramètres non acoustiques et de 4 paramètres mécaniques). Il est bien connu que les propriétés macroscopiques dépendent intrinsèquement des propriétés de la microstructure de la mousse. Ainsi, une co

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6

Mugala, Gavita. "Influence of the semi-conducting screens on the wave propagation characteristics of medium voltage extruded cables." Licentiate thesis, KTH, Electrical Systems, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1537.

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7

Friege, Jonas [Verfasser]. "Increasing homeowners’ insulation activity in Germany - A theoretically and empirically grounded agent-based model analysis / Jonas Friege." Wuppertal : Universitätsbibliothek Wuppertal, 2017. http://d-nb.info/1141194333/34.

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8

Dostálová, Darina. "Částicové kompozity v konstrukčních detailech obvodových plášťů." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-390260.

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Due to a European energy concept for reducing energy consumption and also the concept of sustainable development, there is a growing demand for reduced energy consumption during the operation of the building and hence increasing demands on the thermal and mechanical properties of the building envelope. For this reason, it is necessary to look for materials that could meet both thermal and mechanical properties, as well as mechanical resistance and loadability, especially for the application for the foundations of the house, the base of the house and for application to structural details for el

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9

Bukvišová, Zuzana. "Modelování rychlých přechodných dějů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-316921.

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This thesis deals with the high speed transient modelling in the electrical networks. The introduction of this work discusses mathematical models of the individual devices used in the system and focuses on the line representation. It also contains a more detailed description of Bergeron and frequency dependent line model. The objective of this thesis is to design a network model using ATP-EMTP simulation program. In this model, the switching overvoltage caused by shunt reactor switching and lightning overvoltage are simulated. The thesis thoroughly describes the settings of the components used

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10

Mohamed, Ali Mohamed. "ANALYZING THE IMPACT OF PHOTOVOLTAIC AND BATTERIE SYSTEMS ON THE LIFE OF A DISTRIBUTION TRANSFORMER." Thesis, Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-54952.

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This degree project presents a study case in Eskilstuna-Sweden, regarding the effect of the photovoltaic (PV) systems with battery energy storage system (BESS) on a power distribution transformer, and how they could change the transformer lifespan. For that, an extensive literature review has been conducted, and two MATLAB models were used to simulate the system. One model simulates the PV generation profile, with the option of including battery in the system, and the other one simulates the transformer loss of life (LOL) based on the thermal characteristics. Simulations were using hourly time

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11

Heywood, Richard John. "The degradation models of cellulosic transformer insulation." Thesis, University of Surrey, 1997. http://epubs.surrey.ac.uk/2129/.

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12

Auñón, García Ángel. "Development and validation of a virtual engine model for simulating standard testing cycles." Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/168906.

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[ES] Las nuevas regulaciones en materia de emisiones de efecto invernadero y calidad del aire han conducido la evolución tecnológica de los motores de combustión interna durante los últimos años. Las mejoras en el proceso de la combustión, la sobrealimentación, la gestión térmica, los sistemas de post tratamiento y técnicas como la recirculación de gases de escape, han permitido que los motores de combustión interna de hoy en día sean cada vez más limpios. La adopción en Europa del nuevo ciclo de homologación WLTP, que considera un ciclo de conducción más realista que su predecesor el NEDC, as

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13

Sim, Alec. "Unified model of charge transport in insulating polymeric materials." Thesis, Utah State University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3606878.

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<p> Presented here is a detailed study of electron transport in highly disordered insulating materials (HDIM). Since HDIMs do not lend themselves to a lattice construct, the question arises: How can we describe their electron transport behavior in a consistent theoretical framework? In this work, a large group of experiments, theories, and physical models are coalesced into a single formalism to better address this difficult question. We find that a simple set of macroscopic transport equations--cast in a new formalism--provides an excellent framework in which to consider a wide array of exp

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14

Sim, Alec. "Unified Model of Charge Transport in Insulating Polymeric Materials." DigitalCommons@USU, 2013. https://digitalcommons.usu.edu/etd/2044.

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Charge transport, charging, and subsequent electrostatic discharge due to interactions with the space environment are primary concerns of spacecraft designers. Developing a physical understanding of the interactions of charge with the multitude of materials that spacecraft are composed of is a critical step in understanding and mitigating both short-term and long-term spacecraft degradation. In particular, the study of charge transport in highly insulating materials is critical as they store charge longer, with higher capacity, and with greater destructive capability than other materials.The U

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Konate, Lamine Boubacar. "Modélisation de la tenue diélectrique dans les grands intervalles d'air : application aux intervalles complexes." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEC040.

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Cette thèse est consacrée à l’étude de la décharge positive dans les grands intervalles d’air. L’objectif initial est de se doter d’un modèle capable de déterminer la tension U50 ainsi que le facteur d’intervalle k, deux facteurs importants entrant dans le dimensionnement des ouvrages hautes tensions, dans des géométries complexes. Pour ce faire un bilan des modèles de la décharge disponibles dans la littérature a été fait. Notre choix s’est porté sur le modèle de type circuit développé par le groupe du professeur Beroual et appliqué aussi bien à la décharge positive qu’à la décharge négative.

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Joshi, Anuvrat. "SPIN AND ORBITAL PHYSICS IN INSULATING VANADIUM OXIDE." University of Cincinnati / OhioLINK, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=ucin997463196.

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17

Ruiz, Margot. "Modélisation des transferts hygrothermiques à travers les parois dans un modèle de climat urbain : application aux centres-villes historiques à réhabiliter." Electronic Thesis or Diss., Toulouse, INSA, 2023. http://www.theses.fr/2023ISAT0045.

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Améliorer l'efficacité énergétique des bâtiments et limiter l'ilot de chaleur urbain est une priorité, en particulier dans les centres-villes historiques, composés de bâtiments peu isolés. Un des leviers d’action envisagés est l'isolation des parois. Cependant, la rénovation des parois anciennes rencontre de nombreux obstacles (technologiques, architecturaux, urbains). Ces parois ont notamment un comportement hygrothermique spécifique, qu’il convient de prendre en compte pour éviter l’apparition de pathologies et estimer correctement les déperditions énergétiques. Il est donc primordial d’inté

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18

Benson, James. "A surface-potential-based compact model for partially-depleted silicon-on-insulator MOSFETs." Thesis, University of Southampton, 2009. https://eprints.soton.ac.uk/69885/.

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With the continuous scaling of CMOS technologies, Silicon-on-Insulator (SOI) technologies have become more competitive compared to bulk, due to their lower parasitic capacitances and leakage currents. The shift towards high frequency, low power circuitry, coupled with the increased maturity of SOI process technologies, have made SOI a genuinely costeffective solution for leading edge applications. The original STAG2 model, developed at the University of Southampton, UK, was among the first compact circuit simulation models to specifically model the behaviour of Partially-Depleted (PD) SOI devi

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19

Miranda, Daniel Cesar Bosco de. "Efeitos de desordem e correlação eletrônica numa abordagem local." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/277686.

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Orientador: Eduardo Miranda<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin.<br>Made available in DSpace on 2018-08-13T03:42:46Z (GMT). No. of bitstreams: 1 Miranda_DanielCesarBoscode_M.pdf: 4501306 bytes, checksum: ea9cd3602fb6488ef97069a6df6ae49c (MD5) Previous issue date: 2009<br>Resumo: O objetivo deste trabalho é estudar os efeitos da desordem nas proximidades da transição metal-isolante de Mott. Para tanto, utilizamos o modelo de Hubbard desordenado em duas dimensões. A teoria que aplicamos para estudar esse modelo é a Teoria Estatística

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20

Nikolic, Aleksandar. "The physics of multilayer topological insulator heterostructures using low-energy models." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/283001.

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This thesis studies the physics of multilayer heterostructures grown from topological insulators (TIs), primarily bismuth selenide and antimony telluride, and other topologically trivial materials. This is done by extending a standard low-energy 3D TI Hamiltonian and varying its associated material parameters across the simulation domain. New results arising from the position-dependent TI interface model are found. For the first time, this method is incorporated into a density-functional theory (DFT) solver in order to study the self-consistent charge density in multilayer TI heterostructures

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21

Nájera, Ocampo Oscar. "Study of the dimer Hubbard Model within Dynamical Mean Field Theory and its application to VO₂." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS462/document.

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J'étudie en détail la solution d'un modèle simplifié d'électrons fortement corrélés, à savoir le modèle de Hubbard dimérisé. Ce modèle est la réalisation la plus simple d'un problème de cluster DMFT. Je fournis une description détaillée des solutions dans une région de coexistence où l'on trouve deux états (méta) stables des équations DMFT, l'un métallique et l'autre isolant. De plus, je décris en détail comment ces états disparaissent à leurs lignes critiques respectives. Je clarifie le rôle clé joué par la corrélation intra-dimère, qui agit ici en complément des corrélations de Coulomb.Je pa

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22

Hribernik, Wolfgang. "A model-based diagnosis system for the moisture content of power transformer insulations under varying loading conditions /." Zürich : ETH, 2007. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17417.

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23

Berková, Petra. "Predikce zvukoizolačních vlastností dělicích stavebních konstrukcí a zabezpečení akustické pohody v interiéru budov." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-233798.

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This thesis deals with the properties of soundproof partition structures in the low-frequency sound at impact sound insulation and security of acoustic comfort inside buildings. The prediction of impact sound is a simulation laboratory measurements of impact sound. The work is based on the occurrence of frequent complaints of inhabitants of residential homes for subjectively poor impact sound insulation of horizontal dividing structures, whose top layer is formed laminate. Although these structures conform in terms of impact sound insulation in accordance with the requirements of CSN 73 0532:

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24

Li, Chunhua. "Gutzwiller Approximation in Strongly Correlated Electron Systems." Thesis, Boston College, 2009. http://hdl.handle.net/2345/917.

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Thesis advisor: Ziqiang Wang<br>Gutzwiller wave function is an important theoretical technique for treating local electron-electron correlations nonperturbatively in condensed matter and materials physics. It is concerned with calculating variationally the ground state wave function by projecting out multi-occupation configurations that are energetically costly. The projection can be carried out analytically in the Gutzwiller approximation that offers an approximate way of calculating expectation values in the Gutzwiller projected wave function. This approach has proven to be very successful i

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25

Capone, Massimo. "The Mott Transition: Role of Frustration and Orbital Degeneracy." Doctoral thesis, SISSA, 2000. http://hdl.handle.net/20.500.11767/4230.

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Suárez, Villagrán Martha Yolima 1984. "Efeitos de desordem na transição metal-isolante de Mott." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/277647.

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Orientador: Eduardo Miranda<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin<br>Made available in DSpace on 2018-08-14T07:53:33Z (GMT). No. of bitstreams: 1 SuarezVillagran_MarthaYolima_M.pdf: 2373759 bytes, checksum: 6ea9dc2028d28176c8fe83514187958a (MD5) Previous issue date: 2009<br>Resumo: Determinamos o diagrama de fases do modelo de Hubbard desordenado como função da temperatura e interação por meio da Teoria Estatística Dinâmica de Campo Médio. As linhas espinoidais para o metal e isolante foram traçadas para desordem fraca e moderada, us

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Pflug, Thibault. "Development, characterization and evaluation of switchable façade elements." Thesis, Strasbourg, 2016. http://www.theses.fr/2016STRAD017/document.

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Un niveau important d’isolation des parois de bâtiments peut diminuer le refroidissement du bâtiment en été, quand les conditions extérieures sont favorables. Dans cette thèse, le concept d’isolations commutable, est développé : pendant les périodes de refroidissement, l’isolation commutable peut être désactivée pour refroidir la masse du bâtiment pendant la nuit. Pendant les périodes de chauffage, ce concept peut être utilisé pour utiliser les gains solaires. Dans cette thèse, le potentiel des isolations commutables est étudié pour des bureaux dans un climat continental européen. En outre, de

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Milde, Frank. "Disorder induced metal insulator transition in anisotropic systems." Doctoral thesis, [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=963658441.

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Šich, Pavel. "Motel." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226701.

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The project was prepared with complete documentation of a new Motel at the level of building construction documentation. Motel has a capacity of 25 double beds and one single bed for the disabled. Built-up area is 984,2 square meters. Enclosure is designed as a flat roof. The supporting structure of the building consists of prefabricated reinforced concrete frame. Building design emphasizes on static solution and layout, fire safety, energy saving and safety of use. Drawings were processed in software for design - AutoCad

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Veselský, Jaroslav. "Motel." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240101.

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The subject of this diploma thesis is designing a new building of Motel in Mikulov in Moravia. The object is located near a road in the suburbs. The land is in a sloped terrain. The object has three aboveground floors. In the first floor there is a restaurant including a kitchen and the background. There are two barier free rooms for accommodation as well. In the second floor there are eight double rooms. In the western part of the object there is a multipurpose hall including its own backgroud. In this floor there are recreation rooms to be found – a library and a children’s club. The third f

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Mahani, Mohammad Reza. "Magnetic solotronics near the surface of a semiconductor and a topological insulator." Doctoral thesis, Linnéuniversitetet, Institutionen för fysik och elektroteknik (IFE), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-40398.

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Technology where a solitary dopant acts as the active component of an opto-electronic device is an emerging field known as solotronics, and bears the promise to revolutionize the way in which information is stored, processed and transmitted. Magnetic doped semiconductors and in particular (Ga, Mn)As, the archetype of dilute magnetic semiconductors, and topological insulators (TIs), a new phase of quantum matter with unconventional characteristics, are two classes of quantum materials that have the potential to advance spin-electronics technology. The quest to understand and control, at the at

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Thomas, Ashwin Paul. "Simulated and laboratory models of aircraft sound transmission." Thesis, Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/52319.

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With increased exposure to transportation noise, there have been continued efforts to help insulate homes from aircraft noise. Current aircraft noise guidelines are based primarily on outdoor sound levels. As people spend the majority of their time indoors, however, human perception is evidently more related to indoor sound levels. Investigations are being made to provide further insight into how typical residential constructions affect indoor response. A pilot study has built a single-room "test house", according to typical construction for mixed-humid climate regions, and has directly measur

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Chaves, De Albuquerque Tulio. "Integration of Single Photon Avalanche Diodes in Fully Depleted Silicon-on-Insulator Technology." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEI091.

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Ce travail a pour objectif la conception, la simulation, la modélisation et la caractérisation électrique de diodes à avalanche à photon unique (Single Photon Avalanche Diodes - SPAD) intégrées dans une technologie CMOS Fully Depleted Silicon on Insulator - FDSOI. Les SPAD sont des diodes (jonctions PN) polarisées en inverse au-delà de la tension de claquage, fonctionnant dans le mode Geiger. Grace à leur haute sensibilité et rapidité, les SPAD sont utiles pour plusieurs applications, telles que les mesures de temps de vol (Time of Flight - ToF), l’imagerie médicale (Fluorescence Lifetime Imag

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Lin, Chien-I. "Characterization of the surface plasmon modes in planar metal-insulator-metal waveguides by an attenuated total reflection approach." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42791.

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Surface plasmons are of interest for various applications, including optical interconnects and devices, light sources, nanolithography, biosensors, solar cells, and negative-refraction prisms or superlenses. Some of the most important applications are SP-based optical interconnects and devices, which offer the potential of realizing integrated optical nanocircuitry due to the subwavelength confinement and the slow-wave nature of SPs. The fundamental building element of these applications is the plasmonic waveguide. Among the family of various plasmonic waveguides, the metal-insulator-metal wav

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Sinjukow, Peter. "A model study for Eu-rich EuO." Doctoral thesis, [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=97419137X.

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GUGLIELMINO, MARCO. "Exploring the phase diagram for two-component Bose-Hubbard model in 2D: Mott Insulator to Superfluid transitions and exotic magnetic-like phases." Doctoral thesis, Politecnico di Torino, 2012. http://hdl.handle.net/11583/2502272.

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In this dissertation I present results for Bose-Hubbard model in 2D obtained with quantum Monte Carlo simulations by the Worm algorithm and Mean Field techniques. First I study a uniform system and I describe how the Mottinsulator-to-superfluid transition for a majority component is affected by the presence of a minority superfluid one. Then I focus on magnetic-like ground states known as checkerboard phase which can be obtained in the strongly interacting regime. I am able to establish constraints on parameters relevant for experimental setups which allows the considered phase to manifest.

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Watanabe, T., H. Yokoyama, Y. Tanaka, and J. Inoue. "Predominant magnetic states in the Hubbard model on anisotropic triangular lattices." American Physical Society, 2008. http://hdl.handle.net/2237/11256.

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Salameh, Farah. "Méthodes de modélisation statistique de la durée de vie des composants en génie électrique." Phd thesis, Toulouse, INPT, 2016. http://oatao.univ-toulouse.fr/16622/1/Salameh_Farah.pdf.

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La fiabilité constitue aujourd’hui un enjeu important dans le contexte du passage aux systèmes plus électriques dans des secteurs critiques tels que l’aéronautique, l’espace ou le nucléaire. Il s’agit de comprendre, de modéliser et de prédire les mécanismes de vieillissement susceptibles de conduire les composants à la défaillance et le système à la panne. L’étude des effets des contraintes opérationnelles sur la dégradation des composants est indispensable pour la prédiction de leur durée de vie. De nombreux modèles de durée de vie ont été développés dans la littérature dans le contexte du gé

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Lazar, Václav. "Kalibrace experimentálního zařízení pro testování kosmických technologií." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401523.

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Diplomová práce se zabývá možnosti kalibrace experimentálního testovacího zařízení. Zejména se věnuje návrhu termálního matematického modelu popisujícího tepelné procesy uvnitř zařízení v průběhu měření tepelné vodivosti vzorku. První část práce je věnována seznámení se s testovacím zařízením, jeho limity a principem měření. Popisuje řešení třetí verze testovací komory, společně s nezbytnými úpravami, provedenými za účelem zajištění předepsaných simulačních podmínek. Zmiňuje také potřebu a důvody kalibrace. Druhá část je především zaměřená na návrh kalibračních vzorků a termálního modelu. Uvád

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Motruk, Johannes. "Characterization of topological phases in models of interacting fermions." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-206990.

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The concept of topology in condensed matter physics has led to the discovery of rich and exotic physics in recent years. Especially when strong correlations are included, phenomenons such as fractionalization and anyonic particle statistics can arise. In this thesis, we study several systems hosting topological phases of interacting fermions. In the first part, we consider one-dimensional systems of parafermions, which are generalizations of Majorana fermions, in the presence of a Z_N charge symmetry. We classify the symmetry-protected topological (SPT) phases that can occur in these systems

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Klockar, Zack. "Development of grey-box models for simulating heating consumption in buildings : A study applying system identification methodology to a physics-based framework." Thesis, Uppsala universitet, Avdelningen för systemteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-448097.

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This study models the energy used for heating in buildings by applying system identification methodology. The model development is grounded in physics to provide guidance and interpretability when evaluated. Time-series of heating demand, outdoor temperature, indoor temperature and solar irradiation are considered for the modelling purpose. Evaluation is done through simulation and relies on quantitative measures, residual analysis and visual inspection of model output. Through model development, the study seeks to extrapolate information of physical properties that drives heating demand in bu

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O'Brien, Aroon. "Charge degrees of freedom on the kagome lattice." Doctoral thesis, Universitätsbibliothek Chemnitz, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-71860.

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Within condensed matter physics, systems with strong electronic correlations give rise to fascinating phenomena which characteristically require a physical description beyond a one-electron theory, such as high temperature superconductivity, or Mott metal-insulator transitions. In this thesis, a class of strongly correlated electron systems is considered. These systems exhibit fractionally charged excitations with charge +e/2 or -e/2 in two dimensions (2D) and three dimensions (3D), a consequence of both strong correlations and the geometrical frustration of the interactions on the underlying

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Duchon, Eric Nicholas. "Quantum Phase Transitions in the Bose Hubbard Model and in a Bose-Fermi Mixture." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1386002245.

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Marçal, Nei. "Estudo da estrutura eletrônica e das propriedades ópticas de copolímeros formados por vinilenos e anéis de tiofeno." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/277368.

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Orientador: Bernardo Laks<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin<br>Made available in DSpace on 2018-08-12T11:04:39Z (GMT). No. of bitstreams: 1 Marcal_Nei_D.pdf: 86929566 bytes, checksum: 04c8aa7c4176175d973ff0990de45bad (MD5) Previous issue date: 2008<br>Resumo: Antes da década de 70, todos os materiais poliméricos eram considerados como isolantes e suas aplicações tecnológicas levavam em conta esta característica. De lá para cá, uma nova classe desses materiais, os polímeros conjugados, determinaram uma nova forma de aplicação de sistema

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Costa, Karine Piacentini Coelho da. "Estudo do modelo de Bose-Hubbard usando o algoritmo Worm." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-27022012-085711/.

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Nesta dissertação estudaremos sistemas de bósons ultrafrios armadilhados em uma rede ótica quadrada bidimensional sem levar em consideração o confinamento harmônico. A dinâmica desses sistemas é bem descrita pelo modelo de Bose-Hubbard, que prevê uma transição de fase quântica de um superfluido para um isolante de Mott a temperaturas baixas, e pode ser induzida variando a profundidade do potencial da rede ótica. Apresentaremos o diagrama de fases dessa transição construído a partir de uma aproximação de campo médio e também com um cálculo numérico usando um algoritmo de Monte Carlo Quântico, d

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Breitenstein, Jacques. "Etude par spectroscopie raman de conducteurs organiques unidimensionnels, (tmtsf) 2x." Paris 7, 1988. http://www.theses.fr/1988PA077179.

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Trois sels de bechgaard (tmtsf)::(2)x (ou x=pf::(6), clo::(4) et reo::(4)) sont etudies dans des conditions de double resonance raman. Determination des modes de vibration donnant des termes importants dans ces conditions de double resonance. Mise en evidence de l'existence des modes rendus actifs grace a un forty couplage avec des transferts dynamiques de charge intermoleculaires ou intramoleculaires. Les informations importantes concernant ce couplage de modes internes - transferts de charge sont obtenues lors de l'etude de la transition metal - isolant et de la mise en ordre a 2k::(f) des a

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Kimmerle, Sven-Joachim. "Macroscopic diffusion models for precipitation in crystalline gallium arsenide." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät II, 2009. http://dx.doi.org/10.18452/16060.

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Ausgehend von einem thermodynamisch konsistenten Modell von Dreyer und Duderstadt für Tropfenbildung in Galliumarsenid-Kristallen, das Oberflächenspannung und Spannungen im Kristall berücksichtigt, stellen wir zwei mathematische Modelle zur Evolution der Größe flüssiger Tropfen in Kristallen auf. Das erste Modell behandelt das Regime diffusionskontrollierter Interface-Bewegung, während das zweite Modell das Regime Interface-kontrollierter Bewegung des Interface behandelt. Unsere Modellierung berücksichtigt die Erhaltung von Masse und Substanz. Diese Modelle verallgemeinern das wohlbekannte Mul

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Aouachria, Zéroual. "L'Eolienne Savonius : comportements mécanique et aérodynamique." Aix-Marseille 1, 1987. http://www.theses.fr/1987AIX11062.

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Methode experimentale de mesure des pressions parietales d'un rotor, a axe vertical, de type savonius en rotation. Les resultats obtenus ont ete utilises dans un modele de calcul afin de determiner les parametres mecaniques c::(m)et c::(p) de la machine. Determination des coefficients de trainee et de portance ainsi que du comportement vibratoire du rotor sous l'effet des forces aerodynamiques. Correlation du champ des pressions d'aube avec le systeme des emissions tourbillonnaires engendrees par l'eolienne en rotation. Etude de dispositifs de suspension de type "pilotis" destines a isoler, en

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Мірчук, Ігор Анатолійович. "Підвищення експлуатаційних характеристик суднових кабелів за рахунок технологічних режимів охолодження та радіаційного опромінення електричної ізоляції". Thesis, Національний технічний університет "Харківський політехнічний інститут", 2020. http://repository.kpi.kharkov.ua/handle/KhPI-Press/49276.

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Дисертація на здобуття наукового ступеня кандидата технічних наук (доктора філософії) за спеціальністю 141 "Електроенергетика, електротехніка та електромеханіка" (14 – Електрична інженерія) – Національний технічний університет "Харківський політехнічний інститут", м. Харків, 2020 р. Дисертаційна робота присвячена підвищенню експлуатаційних характеристик суднових кабелів за рахунок технологічних режимів охолодження та радіаційного опромінення ізоляції і оболонки на основі сучасних, які не поширюють полум'я, безгалогенних полімерних композицій, що забезпечують необхідний комплекс електричних, фі

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Song, Kenan. "Theoretical study of disorder and proximity effects in three-dimensional models of topological insulators." Doctoral thesis, Universitat Autònoma de Barcelona, 2018. http://hdl.handle.net/10803/663940.

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Aquest doctorat. El projecte cobreix les investigacions sobre aïllants topològics (TI) de la família Bi2Se3 amb diferents defectes i l'estudi d'efectes de proximitat de TI a la heteroestructura de grafè amb TI. La primera part d'aquest projecte se centra principalment en l'efecte del desordre en les propietats electròniques de TI amb gruix ultrafí (<3 nm). S’ha trobat que la manca de coincidència de rotació entre capes quíntuples de TI pot augmentar el “gap” de volum dels TI però preservar la textura d'espín tipus Rashba en l'estat de la superfície; mentre que la hidrogenació en una superfície

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