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Dissertations / Theses on the topic 'Thermal condensations'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Сіренко, Б. І. "Термодинамічний аналіз термотрансформації теплоти конденсації холодильної машини". Master's thesis, Сумський державний університет, 2019. http://essuir.sumdu.edu.ua/handle/123456789/76520.

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У дослідній частині поставлені задачі термотрансформації теплоти дослідження, визначено та порівняно значення ексергетичних ККД базової схеми (холодильна машина та теплогенератор) та розрахункової схеми (холодильна машина та тепловий насос), а також долю деструкції та втрати ексергії. У конструкторській частині роботи виконано тепловий та конструктивний розрахунок конденсатора для відвернення тепла конденсації холодильної машини. В розділі охорони праці проведено аналіз правил експлуатації холодильних установок та обладнання, проаналізовано загальні вимоги при роботі як знаходяться під стру

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2

Vrána, Tomáš. "Condensation and frost formation in fibrous thermal-insulation materials." Stockholm : Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11632.

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3

Rozé, Fabien. "Study of Thermal Oxidation of SiGe for Advanced CMOS FD-SOI Technologies." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAI018/document.

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La réduction continue des dimensions des transistors depuis les années 60 est à l’origine de l’explosion des usages de l’électronique. Toutefois, la réduction des dimensions à l’échelle nanométrique s’accompagne de nouvelles difficultés qui tendent à limiter les gains des transistors en termes de performances et de consommation.Afin de surmonter ces obstacles et maintenir cette dynamique, des canaux à base de nouveaux matériaux à forte mobilité et de nouvelles architectures de transistors sont désormais utilisées ou à l’étude. L’intérêt de films SiGe contraint en compression sur isolant (SGOI:

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4

Sun, Yongbao. "Exciton-polaritons in thermal equilibrium : from Bose-Einstein condensation to exciton-polaritonics." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/109679.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Chemistry, 2017.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 249-265).<br>Coherent control has been at the heart of the study of physical chemistry. Great advancement has been achieved in the past few decades in coherent control of classical systems by using spatially and temporally shaped electromagnetic waves. In this dissertation, we extend the concept of coherent control to a purely quantum mechanical collective system, namely, microcavity exciton-polariton Bose-Einstein condensa

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5

CINTOLESI, CARLO. "Large-eddy simulations of conjugate heat transfer with evaporation-condensation and thermal radiation." Doctoral thesis, Università degli Studi di Trieste, 2016. http://hdl.handle.net/11368/2908064.

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Heat transfer in fluids and between a fluid and a surrounding solid body is often encountered in practical applications. The numerical investigations of such phenomena is of great interest for a number of practical applications, both on industrial and environmental side. Among the others we mention optimization of home appliances (oven, dishwasher, refrigerators), building design (ventilation and heating systems), electronic equipment design (solar collectors, device cooling systems), environmental flow analysis (atmospheric thermal stratification, evaporation from lakes and channels, solar th

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6

Edwards, Jacob N. "Thermal energy storage for nuclear power applications." Thesis, Kansas State University, 2017. http://hdl.handle.net/2097/36238.

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Master of Science<br>Department of Mechanical and Nuclear Engineering<br>Hitesh Bindra<br>Storing excess thermal energy in a storage media that can later be extracted during peak-load times is one of the better economical options for nuclear power in future. Thermal energy storage integration with light water-cooled and advanced nuclear power plants is analyzed to assess technical feasibility of different storage media options. Various choices are considered in this study; molten salts, synthetic heat transfer fluids, and packed beds of solid rocks or ceramics. In-depth quantitative assessment

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7

Kuttarath, Veettil Deepak. "Thermal Design Optimization of a Miniature Condensate Particle Counter." University of Cincinnati / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1250651342.

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8

Desbuquois, Rémi. "Thermal and superfluid properties of the two-dimensional Bose gas." Paris 6, 2013. http://www.theses.fr/2013PA066068.

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The physical properties of a homogeneous system at the thermodynamic equilibrium are strongly constrained by its dimensionality. In this respect, the two dimensional Bose gas constitutes a particularly interesting system: while it is impossible to observe a long range order at non-zero temperatures, there exists nevertheless a phase transition to a superfluid state at low temperatures. Furthermore, owing to the reduced dimensionality, the equation of state of the weakly interacting two-dimensional Bose gas is scale invariant. In this thesis, we present an experimental study of the two-dimensio

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9

Romero, Hamers Adolfo. "STUDY OF THE THERMAL STRATIFICATION IN PWR REACTORS AND THE PTS (PRESSURIZED THERMAL SHOCK) PHENOMENON." Doctoral thesis, Editorial Universitat Politècnica de València, 2014. http://hdl.handle.net/10251/36536.

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In the event of hypothetical accident scenarios in PWR, emergency strategies have to be mapped out, in order to guarantee the reliable removal of decay heat from the reactor core, also in case of component breakdown. One essential passive heat removal mechanism is the reflux condensation cooling mode. This mode can appear for instance during a small break loss-of-coolant-accident (LOCA) or because of loss of residual heat removal (RHR) system during mid loop operation at plant outage after the reactor shutdown. In the scenario of a loss-of-coolant-accident (LOCA), which is caused by the leak

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10

Campbell, Robert Lorne Dugald. "Thermodynamic properties of a Bose gas with tuneable interactions." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610631.

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11

Kota, Krishna. "DESIGN AND EXPERIMENTAL STUDY OF AN INTEGRATED VAPOR CHAMBER – THERMAL ENERGY STORAGE SYSTEM." Doctoral diss., University of Central Florida, 2008. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2816.

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Future defense, aerospace and automotive technologies involve electronic systems that release high pulsed waste heat like during high power microwave and laser diode applications in tactical and combat aircraft, and electrical and electronic systems in hybrid electric vehicles, which will require the development of an efficient thermal management system. A key design issue is the need for fast charging so as not to overheat the key components. The goal of this work is to study the fabrication and technology implementation feasibility of a novel high energy storage, high heat flux passive heat

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12

Yang, Lei. "Flow Distribution Control and Thermal Homogenization with EHD Conduction Pumping and Experimental Studies in Pool Boiling and Internal Condensation." Digital WPI, 2017. https://digitalcommons.wpi.edu/etd-dissertations/377.

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"Electrohydrodynamic (EHD) pumping relies on the interaction between electrical and flow fields in a dielectric fluid medium. Advantages such as simple and robust design as well as negligible vibration and noise during operation make EHD conduction pumping suitable for various applications. This work investigates meso-scale EHD conduction pumping used as an active flow distribution control mechanism for thermal management systems. Two different scenarios are considered for this purpose: alteration of uniform flow distribution and flow maldistribution correction. Its capability of actively cont

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13

Fadhl, Bandar. "Modelling of the thermal behaviour of a two-phase closed thermosyphon." Thesis, Brunel University, 2016. http://bura.brunel.ac.uk/handle/2438/12871.

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Interest in the use of heat pipe technology for heat recovery and energy saving in a vast range of engineering applications has been on the rise in recent years. Heat pipes are playing a more important role in many industrial applications, especially in increasing energy savings in commercial applications and improving the thermal performance of heat exchangers. Computational techniques play an important role in solving complex flow problems for a large number of engineering applications due to their universality, flexibility, accuracy and efficiency. However, up to now, computational studies

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14

Laneryd, Carl-Johan Tor. "Studies on slow gas flows in the near-continuum regime." 京都大学 (Kyoto University), 2007. http://hdl.handle.net/2433/49141.

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学位授与大学：京都大学 ; 取得学位: 博士(工学) ; 学位授与年月日: 2007-09-25 ; 学位の種類: 新制・課程博士 ; 学位記番号: 工博第2860号 ; 請求記号: 新制/工/1420 ; 整理番号: 25545<br>Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(工学)<br>甲第13389号<br>工博第2860号<br>新制||工||1420(附属図書館)<br>25545<br>UT51-2007-Q790<br>京都大学大学院工学研究科航空宇宙工学専攻<br>(主査)教授青木一生, 教授稲室隆二, 教授斧髙一<br>学位規則第4条第1項該当

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15

Klittich, Mena R. "Surface Interactions with Hierarchical Nanostructures: From Gecko Adhesion to Thermal Behavior." University of Akron / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1499440265902425.

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16

Costa, Cristiana Resende. "Técnicas de obturação termoplástica." Master's thesis, [s.n.], 2014. http://hdl.handle.net/10284/4461.

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Projeto de Pós-Graduação/Dissertação apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Medicina Dentária<br>A obturação do sistema de canais radiculares, é uma das etapas mais importantes do tratamento endodôntico, tendo como objectivo o preenchimento tridimensional do sistema de canais radiculares, eliminando os espaços vazios ocupados anteriormente pelos tecidos pulpares. Para obter sucesso na obturação, é fundamental uma boa preparação químico-mecânica aliada a uma eficaz desinfecção. Esta tese tem como objectivo realizar uma revisão bib

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17

Bravenec, David. "Diagnostika a návrh eliminace tepelných mostů budov." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265536.

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This thesis presents a comparison of building materials for vertical bearing structures of buildings, thermal insulation materials and mutual combination of structural materials and insulators. Furthermore, there are possibilities for solving the most common insulation thermal bridges construction. The paper evaluated the pros and cons of different combinations of building materials. Teplo and Area programs were used for the calculations.

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18

Rao, Manoj. "Thermo-hydrodynamics of an extended meniscus as unit-cell approach of pulsating heat pipe." Thesis, Lyon, INSA, 2015. http://www.theses.fr/2015ISAL0080/document.

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Ce travail fait une tentative pour expliquer les oscillations induites thermiquement auto-entretenue d'un système à deux phases constitué d'un liquide-vapeur confinée ménisque isolé (un bouchon de liquide unique attenant à une bulle de vapeur) à l'intérieur d'un tube capillaire circulaire, la longueur du tube être exposé à un gradient de température net, créant ainsi un cycle continu de l'évaporation et la condensation. Ce système représente la simple « unité-cellule" version d'un caloduc oscillant (PHP). La compréhension fondamentale de son comportement de transport menant à oscillations auto

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19

Denman, Simon Paul. "Improved detection and tracking of objects in surveillance video." Queensland University of Technology, 2009. http://eprints.qut.edu.au/29328/.

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Surveillance networks are typically monitored by a few people, viewing several monitors displaying the camera feeds. It is then very dicult for a human op- erator to eectively detect events as they happen. Recently, computer vision research has begun to address ways to automatically process some of this data, to assist human operators. Object tracking, event recognition, crowd analysis and human identication at a distance are being pursued as a means to aid human operators and improve the security of areas such as transport hubs. The task of object tracking is key to the eective use of more ad

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20

Kareš, Martin. "Návrh ohříváku spalovacího vzduchu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443184.

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This diploma thesis is dedicated to the design of a combustion air heater for a biomass boiler with a water content of over 60%. The first part of the thesis describes biomass and its use in energetics. Furthermore, the stoichiometry of combustion, heat transfer in the exchanger, design of dimensions and air pressure losses are calculated. The last chapter describes the method of air heating regulation.

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21

Denman, Simon P. "Improved detection and tracking of objects in surveillance video." Thesis, Queensland University of Technology, 2009. https://eprints.qut.edu.au/29328/1/Simon_Denman_Thesis.pdf.

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Surveillance networks are typically monitored by a few people, viewing several monitors displaying the camera feeds. It is then very difficult for a human operator to effectively detect events as they happen. Recently, computer vision research has begun to address ways to automatically process some of this data, to assist human operators. Object tracking, event recognition, crowd analysis and human identification at a distance are being pursued as a means to aid human operators and improve the security of areas such as transport hubs. The task of object tracking is key to the effective use of

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22

Lucas, Franck. "Développement et validation de modèles thermo-hydriques dans les bâtiments : influence de la condensation et des systèmes de traitement d'air couplés aux bâtiments." La Réunion, 2001. http://elgebar.univ-reunion.fr/login?url=http://thesesenligne.univ.run/01_24_Lucas.pdf.

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Les usagers d'un bâtiment ont des exigences grandissantes en matière de performance et de confort. Pour répondre à leurs attentes, les concepteurs disposent d'outils précieux : les modèles de simulation de comportement de bâtiments. Leur objectif est de permettre d'améliorer les performances d'un bâtiment confronté à des sollicitations diverses. Développer de nouveaux modèles permet d'améliorer la précision des codes de simulation et d'étendre leur champ d'application. Nous proposons d'ínvestir le champs des transferts thermo-hydriques dans le bâtiment afin d'évaluer l'adéquation et la pertine

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23

Wiedmann, Volker. "In-vitro-Bewertung von Wurzelkanalfülltechniken mit 3-D-Röntgenmikrotomographie und Lichtmikroskopie." Doctoral thesis, Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-175152.

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Das Ziel der hier durchgeführten Studie war es, die Möglichkeiten der zerstörungsfreien Untersuchungsmethode, 3-D-Röntgenmikrotomographie, bei der Bewertung von Wurzelkanalfüllungen anhand der modifizierten lateralen Kondensation, der lateralen Kondensation und bei Thermafil zu untersuchen. Es sollte gezeigt werden, dass die einzelnen Bestandteile der Wurzelkanalfüllung zu differenzieren und im Anschluss auch zu quantifizieren sind. Die ersten 21 mit dieser zerstörungsfreien Methode untersuchten Proben wurden im Anschluss nochmals mit einer klassischen Untersuchungsmethode, der Lichtmikroskopi

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24

Prata, José Eduardo. "Estimativa e recuperação da água presente nos produtos de combustão de centrais termelétricas." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/106/106131/tde-27042018-115515/.

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Usinas Termelétricas (UTEs), compostas por ciclo simples a vapor e ciclo combinado, são instalações industriais que consomem elevadas quantidades de água, sobretudo por conta de suas operações de resfriamento e de geração de vapor. Paralelamente, tem-se observado a redução de oferta deste recurso em muitas regiões onde se encontram instaladas unidades termelétricas, fato que suscita a preocupação, o debate e a pesquisa acerca do desenvolvimento de tecnologias e estratégias direcionadas à mitigação do consumo e reaproveitamento de água em UTEs. Em contrapartida, do mesmo modo que UTEs são inten

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25

Hoang, Thai Minh. "Quantum control of a many-body system in a spin-1 Bose-Einstein condensate." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50358.

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Ultracold atoms provide a powerful tool for studying quantum control of interacting many-body systems with well-characterized and controllable Hamiltonians. In this thesis, we demonstrate quantum control of a many-body system consisting of a ferromagnetic spin-1 Bose-Einstein condensate (BEC). By tuning the Hamiltonian of the system, we can generate either a phase space with an unstable hyperbolic fixed point or a phase space with an elliptical fixed point. A classical pendulum with a stable oscillation about the "down" position and an inverted pendulum with unstable non-equilibrium dynamics

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26

Russeil, Serge. "Expérimentation et modélisation des transferts de chaleur et de masse dans un canal bidimensionnel : Application aux géométries complexes des échangeurs de chaleur." Valenciennes, 1997. https://ged.uphf.fr/nuxeo/site/esupversions/045d17fe-3635-42b9-82b0-d1f122d8226d.

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L'étude menée concerne la condensation d'air humide dans un canal bidimensionnel vertical. L'application directe de cette étude est la prédiction des performances thermiques des batteries de tubes à ailettes planes continues fonctionnant en régime de condensation. Une étude bibliographique présente les phénomènes physiques fondamentaux mis en jeu et les méthodes de calcul des échangeurs thermiques. Elle montre l'intérêt d'employer des codes de calcul pour traiter dans ces géométries complexes : - les transferts combines de chaleur et de masse en présence de gaz incondensables, - et le couplage

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27

Benros, Santos Lopes Silvania. "Integrated CFD Model for Nanoparticle Production in Inductively Coupled Plasma Reactor: Implementation and Application." Doctoral thesis, Universite Libre de Bruxelles, 2016. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/230486.

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Nanoparticles represent a very exciting new area of research. Their small size, ranging from several nanometers to tens of nanometers, is responsible for many changes in the structural, thermal, electromagnetic, optical and mechanical properties in comparison with the bulk solid of the same materials. However, promoting the use of such material requires well-controlled synthesis techniques to be developed. Inductively coupled thermal plasma (ICTP) reactors have been shown to offer unique advantages over other synthesis methods. The purpose of this thesis is to develop a numerical model to assi

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28

Čech, Josef. "Příspěvek k realizaci nákladově a energeticky úsporných rodinných domů." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-233805.

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Dissertation focuses on the verification of construction family houses made of concrete shell block with internal thermal insulation system. The construction technology is transferred to the Czech Republic from France. The work focuses on building envelope. The suitability of implementation is assessed on the basis of verification selected thermal technical requirements placed on building envelope. Requirements are specified by legislation in force in the ČR. The verification was performed by using software simulations and measurements on realized buildings. Critical areas of construction tech

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Hunter, Paige Holt. "Control of Volatile Organic Compound (VOC) Air Pollutants." Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/38614.

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A variety of methods exist to remove volatile organic compound (VOC) air pollutants from contaminated gas streams. As regulatory and public opinion pressures increase, companies are searching for more effective methods to control these emissions. This document is intended as a guide to help determine if existing systems are adequate and to provide additional information to improve the efficiency of the systems. It explores conventional methods of controlling VOC emissions, as well as innovative technologies including membrane separation, plasma destruction, and ozone catalytic ox

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30

Wickremasinghe, Niranjala D. "Optical Properties of Organic Films, Multilayers and Plasmonic Metal-organic Waveguides Fabricated by Organic Molecular Beam Deposition." University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1439307144.

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31

Li, Qiang. "Surface Chemistry of Hexacyclic Aromatic Hydrocarbons on (2x1) and Modified Surfaces of Si(100)." Thesis, University of Waterloo, 2004. http://hdl.handle.net/10012/1263.

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Room-temperature chemisorption of hexacyclic aromatic hydrocarbons on the 2x1, sputtered, oxidized and H-terminated Si(100) surfaces, as well as those upon post treatments of hydrogenation, oxidization and electron irradiation have been investigated by using thermal desorption spectrometry (TDS), Auger electron spectroscopy (AES) and low energy electron diffraction (LEED). This work focuses on the effects of the functional groups (phenyl, methyl, vinyl, heteroatom, and H atom) in the chemisorbed aromatic hydrocarbons (benzene, toluene, xylene isomers, styrene and pyridine) on organic functi

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Armijo, Julien. "Fluctuations de densité dans des gaz de bosons ultafroids quasi-unidimensionnels." Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00601066.

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Cette thèse présente la conception et l'implémentation d'une nouvelle génération de puces à atomes, ouvrant de nouvelles perspectives expérimentales dans des micropièges magnétiques très anisotropes. Les propriétés thermiques des puces en nitrure d'aluminium sont étudiées en détail. Le dispositif a été optimisé pour piéger de plus grands nombres d'atomes et améliorer la qualité de l'imagerie, notamment en fabriquant un miroir de planéité sub-λ/10 à la surface de la puce.Nous étudions des gaz quasi-1D grâce à des images in situ de profils fluctuants et des méthodes précises de calibration et d'

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33

Abada, Fella. "Transport d'humidité en matériaux poreux en présence d'un gradient de température : caractérisation expérimentale." Université Joseph Fourier (Grenoble), 1994. http://www.theses.fr/1994GRE10135.

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Ce travail de these porte sur des etudes experimentales relatives aux transferts monodimensionnels d'humidite sous differents gradients thermiques dans des materiaux poreux qui sont: le beton autoclave non expanse, la vermiculite, deux roches extraites de carrieres (rouffach et rorschach) servant a la restauration de monuments historiques. Un dispositif experimental est utilise pour le suivi continu des evolutions de teneurs en eau (methode gammametrique) et de temperatures (sondes thermiques) durant des essais de condensation et de sechage. L'objectif principal de ce travail est la determinat

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34

Janíček, Vít. "Studium vlhkostně-transportních vlastností polymer-cementových stěrek pro vnější kontaktní zateplovací systémy budov." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392337.

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This diploma thesis deals with study of the moisture-transport properties of polymer cementious ETICS mortars at different doses of redispersible polymer powder. The effect of aerate on these screeds is also investigated. The thesis also evaluates the effect of use various external surface treatments due to risk of cumulate moisture in the perimeter structure.

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Métayer, Julien. "Réduction des émissions de polluants automobiles par une approche thermique globale." Thesis, Vandoeuvre-les-Nancy, INPL, 2011. http://www.theses.fr/2011INPL057N.

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Les travaux de cette thèse s’inscrivent dans le cadre de la mise en place d’une méthodologie innovante de gestion thermique globale des véhicules automobiles. Ils portent plus particulièrement sur l’analyse de la réduction des émissions de polluants et l’amélioration des performances énergétiques d’un moteur à combustion, notamment dans les charges partielles ou en régime transitoire. Le premier objectif vise la mise en évidence de l’effet de la température d’admission sur le fonctionnement du moteur. Le deuxième objectif est relatif à la prédiction de l’apparition des phénomènes de condensati

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Guzej, Michal. "Metody prostorové a spektrální charakterizace světelných zdrojů používaných v automobilové technice." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-376779.

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Automotive headlamps work in very variable operating conditions during which the producer have to guarantee their primary function of seeing and being seen. During the development stage of the new headlamps the manufacturers want to eliminate defects which could led to malfunction in operation. The numerical simulations along with the test procedures are appropriate tools for detection of problematic areas. The most appropriate approach is designing of experiment with a view to the subsequent simple implementation of the measured data into numerical simulations software and carefully choosing

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Kandel, Hari P. "Land Use /Land Cover Driven Surface Energy Balance and Convective Rainfall Change in South Florida." FIU Digital Commons, 2015. http://digitalcommons.fiu.edu/etd/2198.

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Modification of land use/land cover in South Florida has posed a major challenge in the region’s eco-hydrology by shifting the surface-atmosphere water and energy balance. Although drainage and development in South Florida took place extensively between the mid- and late- 20th century, converting half of the original Everglades into agricultural and urban areas, urban expansion still accounts for a dominant mode of surface cover change in South Florida. Changes in surface cover directly affect the radiative, thermophysical and aerodynamic parameters which determine the absorption and partition

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Власенко, Олександр Володимирович, Александр Владимирович Власенко та Oleksandr Volodymyrovych Vlasenko. "Електрофізичні та магніторезистивні властивості плівкових сплавів на основі Fe і Ge". Thesis, Сумський державний університет, 2021. https://essuir.sumdu.edu.ua/handle/123456789/85451.

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Дисертаційна робота присвячена дослідженню електрофізичних, магніторезистивних, магнітооптичних властивостей та ефекту Холла в плівкових системах на основі металу (Fe) і напівпровідника (Ge) в умовах фазоутворення. У плівкових сплавах, сформованих на основі відпалених до 900−1070 К тришарових плівок Fe(5−10 нм)/Ge(2−25 нм)/Fe(15−50 нм), в залежності від співвідношення концентрацій атомів окремих компонент утворюються магнітні плівки германідів заліза Fe2Ge, FeGe і FeGe2 із середніми розмірами кристалітів 15–30 нм. Порівняння експериментальних величин питомого опору двошарових плівкових систем

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PUKHOVA, VALENTINA. "DYNAMIC ATOMIC FORCE MICROSCOPY RESOLVED BY WAVELET TRANSFORM." Doctoral thesis, Università degli Studi di Milano, 2015. http://hdl.handle.net/2434/259234.

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Atomic Force Microscopy (AFM) is perhaps the most significant member of the scanning probe microscopes family and, because of its capability of working in air and liquid environments with virtually no limitations on imaging conditions and types of samples, it is definitely one of the most widely used. It has become an indispensable tool to measure mechanical properties at the nanoscale in various research contexts. Scanning probes used in AFM are micromechanical oscillators (typically cantilevers) and the theory of AFM dynamics is based on the analysis of the oscillating modes of beam resonat

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Grossir, Guillaume. "Longshot hypersonic wind tunnel flow characterization and boundary layer stability investigations." Doctoral thesis, Universite Libre de Bruxelles, 2015. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209044.

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The hypersonic laminar to turbulent transition problem above Mach 10 is addressed experimentally in the short duration VKI Longshot gun tunnel. Reentry conditions are partially duplicated in terms of Mach and Reynolds numbers. Pure nitrogen is used as a test gas with flow enthalpies sufficiently low to avoid its dissociation, thus approaching a perfect gas behavior. The stabilizing effects of Mach number and nosetip bluntness on the development of natural boundary layer disturbances are evaluated over a 7 degrees half-angle conical geometry without angle of attack. <p><p>Emphasis is initially

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Corgier, Robin. "Engineered atomic states for precision interferometry." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS186/document.

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La physique moderne repose sur deux théories fondamentales distinctes, la relativité générale et la mécanique quantique. Toutes les deux décrivent d’une part les phénomènes macroscopiques et cosmologiques tels que les ondes gravitationnelles et les trous noirs et d’autre part les phénomènes microscopiques comme la superfluidité ou le spin des particules. L’unification de ces deux théories reste, jusqu’à présent, un problème non résolu. Il est intéressant de noter que les différentes théories de gravité quantique prédisent une violation des principes de la relativité générale à différents nivea

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Пилипенко, Олександр Валерійович, Александр Валериевич Пилипенко та Oleksandr Valeriiovych Pylypenko. "Електрофізичні та магніторезистивні властивості плівкових систем на основі Fe, Ni та Ag або Au". Thesis, Сумський державний університет, 2019. http://essuir.sumdu.edu.ua/handle/123456789/73162.

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Дисертаційна робота присвячена встановленню загальних закономірностей у електрофізичних, магніторезистивних та магнітооптичних властивостях плівкових систем на основі Fe, Ni та Ag або Au, одержаних методами одночасної та пошарової конденсації металів, в умовах розмірних і концентраційних ефектів. Дослідження структурно-фазового стану показало, що в плівкових системах на основі Fe і Ag або Au вже на стадії конденсації відбувається утворення невпорядкованих обмежених твердих розчинів. Уперше встановлено, що в системах (Fe + Ag)/П тверді розчини формуються на основі ГЦК-гратки Ag (параметр грат

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RIGHETTI, GIULIA. "Application of innovative refrigerants with low environmental impact for refrigeration and thermal control." Doctoral thesis, 2016. http://hdl.handle.net/11577/3239021.

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Il Capitolo 1 si apre con una breve introduzione riguardante la questione, purtroppo sempre attuale, dell’impatto ambientale dovuto all’attività umana e del surriscaldamento globale, facendo rifermento alle misure adottate negli anni per limitarlo. In seguito viene posta attenzione sul tema dei fluidi refrigeranti a basso impatto ambientale – e dunque a basso indice GWP – e in special modo sulle applicazioni in cui sussiste uno scambio termico bifase. Con l’interesse e lo scopo di coprire il maggior numero di casistiche adottate nella tecnica applicativa, la tesi approfondisce quattro tipi div

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鄭文漢. "Thermo-Hydraulic Characteristics of Dielectric Fluid FC-72 Condensation in a Small-Gap Annulus." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/53742166752538828544.

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碩士<br>國立交通大學<br>機械工程系<br>91<br>This thesis experimentally investigated the condensation transfer coefficient and pressure drop characteristics of dielectric liquid FC-72 in a horizontal annulus,as well as the flow patterns. The horizontal annulus has 22mm I.D. and 25 O.D.The heat transfer coefficients were shown to rise with the mass flux and mean vapor quality.Mass flux has a greater effect on heat transfer coefficient at mean and higher quality. Generally, heat transfer coefficients increased with higher heat flux,but the results showed that at mass flux G=75kg/㎡s the condensation heat trans

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Tewari, Mukul. "Some numerical experiments on thermally induced circulations with a mesoscale model and applications of various condensation schemes." Thesis, 1995. http://localhost:8080/xmlui/handle/12345678/2635.

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Bühring, Kristian. "Beschreibung des thermisch gesteuerten Kondensationsverhaltens von Dampfblasen in Fernwärmesystemen unter Berücksichtigung der Anlagensicherheit." 2019. https://tud.qucosa.de/id/qucosa%3A38710.

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Die Bildung von Dampfphasen in Fernwärmesystemen während des instationären Übergangs vom Umlaufbetrieb in den Ruhezustand wird zugelassen, sofern adiabate Randbedingungen im Hochpunkt und thermisch gesteuertes Kondensationsverhalten der Dampfblase sichergestellt sind. Zur physikalischen Beschreibung wird ein Modell entwickelt, welches von einer zusammenhängenden Dampfblase im Hochpunkt ausgeht und das thermisch gesteuerte Rückbildungsverhalten während des Füll- bzw. Nachspeisevorganges abbildet. Die Rohrgeometrie im Hochpunkt sowie Wärmetransportvorgänge werden dabei berücksichtigt. Der Gesamt

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Wiedmann, Volker. "In-vitro-Bewertung von Wurzelkanalfülltechniken mit 3-D-Röntgenmikrotomographie und Lichtmikroskopie." Doctoral thesis, 2014. https://ul.qucosa.de/id/qucosa%3A13406.

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Das Ziel der hier durchgeführten Studie war es, die Möglichkeiten der zerstörungsfreien Untersuchungsmethode, 3-D-Röntgenmikrotomographie, bei der Bewertung von Wurzelkanalfüllungen anhand der modifizierten lateralen Kondensation, der lateralen Kondensation und bei Thermafil zu untersuchen. Es sollte gezeigt werden, dass die einzelnen Bestandteile der Wurzelkanalfüllung zu differenzieren und im Anschluss auch zu quantifizieren sind. Die ersten 21 mit dieser zerstörungsfreien Methode untersuchten Proben wurden im Anschluss nochmals mit einer klassischen Untersuchungsmethode, der Lichtmikroskopi

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(9525965), Yashwant S. Yogi. "ENERGY EFFICIENCY AND FLUX ENHANCEMENT IN MEMBRANE DISTILLATION SYSTEM USING NOVEL CONDENSING SURFACES." Thesis, 2020.

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<p>The water crisis is increasing with every passing day due to climate change and increase in demand. Different desalination methods have been developed over the years to overcome this shortage of water. Reverse Osmosis is the most widely used desalination technology, but cannot treat many fouling-prone and high salinity water sources. A new desalination technology, Membrane distillation (MD), has the potential to purify wastewater as well as highly saline water up to a very high purity. It is a thermal energy-driven desalination method, which can operate on low temperature waste heat sources

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Alrowais, Raid. "Theoretical and experimental investigation of liquid droplets flashing for low cost seawater desalination." Diss., 2020. http://hdl.handle.net/10754/662705.

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The high specific energy consumption from all existing seawater desalination methods has heightened the motivation for having more efficient and greener desalination processes to meet the future goals of sustainable seawater desalination. One of the promising thermally-driven desalination methods is the direct-contact spray evaporation and condensation (DCSEC) where the excess enthalpy between feed and equilibrium states of evaporator chambers is exploited with reasonably high flashing efficiency. Further improvements in energy efficacy of DCSEC are boosted by firstly the incorporation of micr

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