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Dissertations / Theses on the topic 'Chemical expansion'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Ruschman, Chad. "Chemical tuning of thermal expansion in oxides." Thesis, Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/34778.

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This work focuses on the chemical substitution of cations and anions in the frameworks of materials that have been known to exhibit negative thermal expansion (NTE). Zr2(PO4)2(SO4) is a member of the A(2)M(3)O(12) family which has been known to exhibit NTE. We have shown that Zr2(PO4)2(SO4) exhibits anisotropic positive thermal expansion. We have also shown that this material has been characterized in the wrong space group. Hf2(PO4)2(SO4) behaves similarly to Zr2(PO4)2(SO4) and follows this trend. Under pressure, Hf2(PO4)2(SO4) appears to undergo a phase transition. We have still yet to determ

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2

Crumley, Winfred H. Jr. "Supersonic expansion from high-temperature sources." Diss., Georgia Institute of Technology, 1985. http://hdl.handle.net/1853/27447.

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3

Liu, Meimei. "Expansion and Osteogenic Differentiation of Human Amniotic Fluid Derived Stem Cells." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1370277490.

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4

Carey, Thomas. "Chemical control of thermal expansion in zeolites with the LTA topology." Thesis, University of Birmingham, 2013. http://etheses.bham.ac.uk//id/eprint/4258/.

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Zeolites are microporous materials that have been commonly shown to exhibit remarkable negative thermal expansion (NTE) behaviour in their purely siliceous forms, with reported thermal expansion coefficients ranging from −3 x 10–\(_6\) K–\(_1\) to −26.1 x 10–\(_6\) K–\(_1\). In contrast, very little research has been reported on the aluminium-containing structures which are widely used for various commercial applications. Compounds exhibiting this property, which has only been observed in a small number of solids, are of considerable technological interest as their inclusion in devices or comp

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5

Greenstein, David Michael, and Jennifer Ying Hsu. "Analysis of international expansion as a Tier 2 supplier to the auto industry." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/50303.

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Thesis (M.S.)--Massachusetts Institute of Technology, Sloan School of Management, 1997, and Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1997.<br>Includes bibliographical references (p. 130).<br>by David Greenstein, Jennifer Hsu.<br>M.S.

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Gibbons, Meghan (Meghan Leigh). "Valuing project financing using Monte Carlo simulation, with application to the expansion of a chemical company." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32896.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2005.<br>Includes bibliographical references (p. 54).<br>The purpose of this thesis is to analyze the specific project value of a chemical company that undertook a major expansion in the late 1990s. The actual details of the investment were unique and conditional on the level of cumulative internal rate of return for the project. This thesis evaluates the project value and the terms of the project financing using Monte Carlo simulation, which is able to take into account the path-dependent nature of the cash

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7

Cai, Andrew. "CHEMICAL EXPANSIVITY IN CERAMIC OXYGEN TRANSPORT MATERIALS." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case159439738367673.

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8

Pazat, Alice. "Chemical Modification of Graphite-based Derivates and Their Uses in Elastomer Nanocomposites." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSE1050/document.

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L'objectif de la thèse a été d'explorer différentes voies de dispersion de charges graphitiques dans des élastomères de type polyisoprène dans le but d'améliorer les propriétés mécaniques et barrière. Pour augmenter les interactions entre le graphite et l'élastomère et donc diminuer les interactions entre charges, les charges graphitiques ont été modifiées chimiquement. Le graphite a été préalablement oxydé pour obtenir du graphite oxydé (GO) contenant des groupements époxyde, hydroxyle et acide carboxylique, susceptibles de servir comme sites d'ancrage de molécules et de chaînes polymères. Af

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9

Motianlifu, Muzhapaer. "Expansion of Reaction Network Flux Analysis toward including Life Cycle Assessment and Ecosystem Services." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1492635223149177.

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10

Drews, Aaron M. "Control of Thermal Expansion Coefficient of a Metal Powder Composite via Ceramic Nanofiber Reinforcement." University of Akron / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=akron1248114951.

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11

Johnson, William J. "The Effect of Chemical Composition of Blast-Furnace Slag on Compressive Strength and Durability Properties of Mortar Specimens." Scholar Commons, 2017. https://scholarcommons.usf.edu/etd/7410.

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In an effort to make structures more sustainable and durable, supplementary cementitious materials are often used to replace cement. Ground granulated blast furnace slag, for instance, is an industrial by-product of iron refinement and is frequently used in concrete mixture design to not only reduce cost, but also increase later-age strength as well as durability. However, published literature indicates that slags with a high alumina content may have a detrimental effect when concrete is exposed to a sulfate environment. ASTM standard C989 does not suggest any information o

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12

Dalgic, Meric. "Solutions Of The Equations Of Change By The Averaging Technique." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609525/index.pdf.

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Area averaging is one of the techniques used to solve problems encountered in the transport of momentum, heat, and mass. The application of this technique simplifies the mathematical solution of the problem. However, it necessitates expressing the local value of the dependent variable and/or its derivative(s) on the system boundaries in terms of the averaged variable. In this study, these expressions are obtained by the two-point Hermite expansion and this approximate method is applied to some specific problems, such as, unsteady flow in a concentric annulus, unequal cooling of a long slab, un

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13

Li, Xin. "Development and Application of Chemical and Structural Biology Approaches to Probe Protein Function." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1306439016.

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14

Thomas, Philipp. "Systematic approximation methods for stochastic biochemical kinetics." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/16197.

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Experimental studies have shown that the protein abundance in living cells varies from few tens to several thousands molecules per species. Molecular fluctuations roughly scale as the inverse square root of the number of molecules due to the random timing of reactions. It is hence expected that intrinsic noise plays an important role in the dynamics of biochemical networks. The Chemical Master Equation is the accepted description of these systems under well-mixed conditions. Because analytical solutions to this equation are available only for simple systems, one often has to resort to approxim

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Mojica, Velazquez Jose Luis. "A Dynamic Optimization Framework with Model Predictive Control Elements for Long Term Planning of Capacity Investments in a District Energy System." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/3886.

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The capacity expansion of a district heating system is studied with the objective of evaluating the investment decision timing and type of capacity expansion. District energy is an energy generation system that provides energy, such as heat and electricity, generated at central locations and distributed to the surrounding area. The study develops an optimization framework to find the optimal investment schedule over a 30 year horizon with the options of investing in traditional heating sources (boilers) or a next-generation combined heat and power (CHP) plant that can provide heat and electric

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Suardin, Jaffee Arizon. "The application of expansion foam on liquefied natural gas (LNG) to suppress LNG vapor and LNG pool fire thermal radiation." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2906.

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Nacitas, Joselle. "Composition du fruit à pain récolté sur un territoire contrasté : Structure, propriétés et aptitudes technologiques de son amidon." Thesis, Antilles-Guyane, 2012. http://www.theses.fr/2012AGUY0517/document.

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Les résultats de cette étude de la composition du fruit à pain récolté sur un territoire contrasté du point de vue agropédoclimatique, et de son amidon, montrent que la teneur en amidon du fruit à pain apparaît comme étant influencée par la saison, mais pas par la zone de récolte. La teneur en amidon beaucoup plus élevée pour les fruits à pain développés durant la saison la plus sèche est un résultat très original. La connaissance du cycle de développement des fruits à pain à la Martinique a été décrite pour une première fois, permettant de déterminer une période de récolte optimisée par rappo

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Khazeni, Nasser. "Synthesis And Characterization Of Zirconium Tungstate-zirconia Core-shell Composite Particles." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615316/index.pdf.

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Thermal mismatch between different components of a system could cause of problems like residual stress induced cracking, thermal fatigue or even optical misalignment in certain high technology applications. Use of materials with customized thermal expansion coefficient is a counter-measure to resolve such problems. Zirconium tungstate (ZrW2O8) with negative thermal expansion coefficient is capable of being used in synthesis of composites with tailored coefficient of thermal expansion (CTE). In this work, the sol-gel method which had been already set up in our group was characterized and the so

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19

Zischang, Julia. "Strukturdynamik wasserhaltiger Aggregate in Überschallexpansionen." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2014. http://hdl.handle.net/11858/00-1735-0000-0022-5F0D-D.

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Isolierte Molekülcluster können durch Fourier-Transformations-Infrarotspektroskopie von Überschallexpansionen untersucht werden. Es wird gezeigt, wie Multischlitzdüsen verschiedener Geometrien sowohl zur Aufklärung des Strukturverhaltens von Wasseraggregaten bei thermischer Anregung als auch zur Erzeugung von Mischclustern bei gleichzeitiger Unterdrückung von Isotopenaustauschreaktionen eingesetzt werden können. Zusätzlich wurde ein Aufbau zur chemischen Bildgebung von Expansionen entwickelt und zur ortsaufgelösten Visualisierung von Aggregationsprozessen sowie Dichte- und Temperaturentwicklu

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20

Moundoungou, Idriss. "Une étude de faisabilité pour une meilleure utilisation dans le matériau béton de granulats " potentiellement réactifs " vis-à-vis de la réaction alcali-silice." Phd thesis, Lille 1, 2010. http://tel.archives-ouvertes.fr/tel-00587058.

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L'emploi des granulats classés " potentiellement réactifs " vis-à-vis de la réaction alcali-silice implique de prendre des précautions très contraignantes pour les producteurs comme pour les maîtres d'ouvrages suivant les recommandations actuelles. D'où la nécessité de trouver des voies de valorisation plus judicieuses. La piste suivie dans cette thèse est la mise au point des formulations de béton présentant un risque faible d'expansion avec des granulats calcaires siliceux dits " potentiellement réactifs " mais qui peuvent présenter un effet pessimum. Les travaux réalisés ont d'abord permis

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21

Valentin, Olivier. "Modélisation thermo-chimio-mécanique des conducteurs mixtes : application à la production de H2/CO." Thesis, Orléans, 2010. http://www.theses.fr/2010ORLE2069.

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La semi-perméation à haute température dans les matériaux conducteurs mixtes introduit des sollicitations chimiques. Ces matériaux sont donc sujets à des déformations d’origine thermique et d’origine chimique qui entraînent des contraintes thermo-chimio-mécaniques dont il convient de tenir compte pour anticiper leur tenue mécanique en service. Ce travail de modélisation en science pour l’ingénieur, intrinsèquement multiphysique, a pour but d’ouvrir la voie au calcul de structures de dimensions industrielles en adoptant une modélisation fonction des paramètres directement mesurables. Il s’artic

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Singamaneni, Srikanth. "Microstructures and multifunctional microsystems based on highly crosslinked polymers." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29746.

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Thesis (Ph.D)--Polymer, Textile and Fiber Engineering, Georgia Institute of Technology, 2010.<br>Committee Chair: Tsukruk, Vladimir; Committee Member: Gall, Ken; Committee Member: Griffin, Anselm; Committee Member: Jang, Seung Soon; Committee Member: Thio, Yonathan. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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23

Tu, Jie. "Thermal expansion of chemically modified mullite." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/43063.

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Solid-state reaction and sol-gel, processing techniques were used extensively to form chemically-modified mullite solid solutions in an effort to lower their thermal expansion coefficients. TiO2, B203, CrPO4, P205, Ga203, Cr203, and WO3 and the half-breed Si02 compounds AlPas, BPO4, GaPO4, BAsO4, AIAsO4, GaAsO4, and Ge02 were chosen as the modifiers. The results indicate that, apart from Ti02, none of the substitutions made in mullite significantly change the thermal expansion properties. The solubility of 3 wt% TiO2 in mullite reduces the coefficient of thermal expansion by about 10%; T

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24

Wyckoff, Peter S. (Peter Scott). "Numerical solution of differential equations through empirical eigenfunction expansions." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/29872.

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25

Gao, Xiao Xiao. "Contribution to the requalification of alkali silica reaction (ASR) damaged structures : assessment of the ASR advancement in aggregates by alkali silica reaction." Thesis, Toulouse, INSA, 2010. http://www.theses.fr/2010ISAT0034/document.

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Afin de répondre aux questions des propriétaires de structures atteintes de réaction alcali-silice (RAS), ce travail se concentre sur une partie d'une méthodologie globale, proposée initialement par le LMDC et EDF, et dont le but est l'étude du comportement mécanique des constructions endommagées par la RAS. Pour atteindre cet objectif, l'avancement chimique de la RAS des granulats récupérés dans les structures affectées doit être évalué. Ainsi, ce travail est consacré à la quantification de la silice potentiellement réactive des granulats, par l'utilisation de deux approches : une approche in

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26

López, Pintor Darío. "Theoretical and experimental study on the autoignition phenomena of homogeneous reactive mixtures." Doctoral thesis, Universitat Politècnica de València, 2017. http://hdl.handle.net/10251/90642.

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The main objective of this Thesis is the study of the autoignition phenomenon of reactive mixtures from a theoretical and experimental point of view. A wide parametric study has been carried out in a Rapid Compression-Expansion Machine (RCEM) for different initial temperatures, compression ratios, equivalence ratios and molar fractions of oxygen (by using synthetic EGR) for different fuels. The ignition delay referred to cool flames (if it can be identified), as well as the ignition delay referred to the high-temperature stage of the ignition, have been experimentally obtained and their trends

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Максимчук, Т. Ю., та T. Yu Maksimchuk. "Кристаллическая структура и физико-химические свойства сложнооксидных фаз Nd1.6Ca0.4Ni1-yCuyO4+δ : магистерская диссертация". Master's thesis, б. и, 2021. http://hdl.handle.net/10995/99984.

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Работа содержит 71 страницу, 52 рисунка, 8 таблиц, 73 наименования в списке литературы. Ключевые слова: ТВЕРДООКСИДНЫЙ ТОПЛИВНЫЙ ЭЛЕМЕНТ, КАТОДНЫЙ МАТЕРИАЛ, СТРУКТУРА РАДДЛЕСДЕНА-ПОППЕРА, ТЕРМИЧЕСКОЕ РАСШИРЕНИЕ, ЭЛЕКТРОПРОВОДНОСТЬ, ХИМИЧЕСКАЯ СОВМЕСТИМОСТЬ. Методом пиролиза глицерин-нитратных композиций проведен синтез сложных оксидов Nd1.6Ca0.4Ni1-yCuyO4+δ (y = 0.0-0.4). Методом рентгеновской дифракции определен фазовый состав порошков Nd1.6Ca0.4Ni1 yCuyO4+δ (y = 0.0-0.4) (ДРОН-6). Методом Ритвелда при использовании программного пакета FullProf Suite уточнены кристаллоструктурные параметры Nd

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Kolotygin, Vladislav. "Materiais à base de óxidos com estrutura do tipo perovskite e compósitos como ânodos de PCES." Doctoral thesis, Universidade de Aveiro, 2015. http://hdl.handle.net/10773/13968.

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Doutoramento em Ciência e Engenharia de Materiais<br>This work was focused on the analysis of transport, thermomechanical and electrochemical properties of a series of perovskite-like oxide materials and composites for potential applications as anodes of intermediate-temperature solid oxide fuel cells (SOFCs) with lanthanum gallate and silicate solid electrolytes. The primary attention was centered on A(Mn,Nb)O3-δ (A = Sr, Ca) and (La,Sr)(Mn,Ti)O3-based systems, lanthanum chromite substituted with acceptor-type and variable-valence cations, and various Ni-containing cermets. Emphasis was given

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Trupkovic, Alexandra. "Etude de verres borates de lithium utilisables dans les microbatteries : corrélation conductivité ionique / propriétés thermomécaniques." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2009. http://tel.archives-ouvertes.fr/tel-00659229.

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L'utilisation croissante de systèmes électroniques miniaturisés induit une forte demande en microsources d'énergie performantes, telles que les microbatteries au lithium. En vue d'améliorer les propriétés de l'électrolyte, nous avons étudié les propriétés électriques et thermomécaniques d'électrolytes solides de type borate de lithium. Une corrélation entre la conductivité ionique et le coefficient de dilatation thermique (CTE) a été mise en évidence pour différentes compositions de verres massifs. A partir des résultats de CTE obtenus, un modèle de prédiction basé sur les travaux de Appen per

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Lei, Xiaoqin. "Theoretical modelling of coupled chemo-hydro-mechanical behaviour of unsaturated expansive clays." Thesis, Lyon, INSA, 2015. http://www.theses.fr/2015ISAL0074.

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Expansive clays used in engineering practice are usually unsaturated and are sensitive to chemical composition of the in-pore solution. To analyse the complex coupled problems involved, an efficient mathematical model which can account for these chemo-hydro-mechanical behaviours has been developed. In this thesis, expansive clays are conceptualised into three-phase multi-species porous media. Based on the modified mixture theory and irreversible thermodynamics, a thermo-electro-chemo-hydro-mechanical framework has been developed. The Clausius-Duhem inequality, which governs the dissipations as

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Lalet, Grégory. "Composites aluminium/fibres de carbone pour l'électronique de puissance." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2010. http://tel.archives-ouvertes.fr/tel-00538480.

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L'étude a pour objectif l'amélioration de la fiabilité des assemblages électroniques à travers la mise en œuvre de drains composites aluminium/fibres de carbone. Le travail a consisté à 1) modéliser, par la méthode des éléments finis, l'influence des propriétés thermiques et mécaniques du matériau de semelle sur l'assemblage életronique ; 2) élaborer (par frittage sous charge uniaxiale, frittage flash et extrusion à chaud) des matériaux composites aluminium/fibres de carbone ; et 3) lier les microstructures observées aux paramètres des procédés d'élaboration ainsi qu'aux propriétés thermiques

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PUMA, SARA. "Chemico-mechanical improvement of bentonite barriers for pollutant containment." Doctoral thesis, Politecnico di Torino, 2013. http://hdl.handle.net/11583/2507922.

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Pollution control represents one of the main problems of public interest in all industrialised countries. Since the 1970s, when the engineering of waste containment began, the overall objective of Environmental Geotechnics was to limit contaminant discharge to groundwater and subsoil. Since the 1990s design engineers and environmental agencies have shown a growing interest in the use of geosynthetic clay liners (GCLs) as an alternative to compacted clays in cover systems or in bottom lining of waste containment facilities because they have very low hydraulic conductivity to water and relativ

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Gana, Inès. "Caractérisation physique et chimique des substances à activité thérapeutique : application aux études de profil de stabilité et de préformulation." Thesis, Sorbonne Paris Cité, 2015. http://www.theses.fr/2015USPCB164/document.

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Le développement d’un médicament pour une cible thérapeutique donnée passe par plusieurs étapes qui se résument en une étape de criblage, une phase préclinique et plusieurs phases cliniques. Ces étapes permettent de sélectionner une substance active et de démontrer son efficacité thérapeutique et sa sécurité toxicologique. Ces deux critères définissent la qualité du médicament qui, une fois démontrée, doit être garantie pendant toute sa durée de validité. La qualité est évaluée au moyen d’études de stabilité qui sont réalisées d’abord sur la matière première de la substance active au cours de

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Chen, Li-Hao, and 陳力豪. "Effects of Chemical Composition and Heat Treatment on Thermal Expansion Coefficient of Low Thermal Expansion Cast Irons." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/44325831381263932737.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>101<br>The primary purposes of this research are twofold: (1) to study the feasibility of alloying substitutions for Ni at different additions to achieve low α values, (2) to establish the optimal heat treatment conditions for attaining the lowest possible α values, and further to analyze the mechanisms related to the change in α values with microscopic features. The experimental results regarding the alloying substitutions of Mn, Ti, Cu, V, Al, Sn Cr, W or Zr for Ni indicate that, except for Zr, all other alloying elements cause an increase in α value, and also

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Huang-LiangLin and 林皇良. "A Study of Glass Expansion By Chemical Strengthening (Ion Exchanged Method)." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/q63xbf.

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HANG, THONG. "AN IMPROVED HARD SPHERE EXPANSION CONFORMAL SOLUTION THEORY TO PREDICT VAPOR LIQUID EQUILIBRIA." Thesis, 1986. http://hdl.handle.net/1911/15977.

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The HSE (Hard Sphere Expansion) theory calculates the thermodynamic properties of a mixture by separating its properties into contributions from molecular repulsion, which are calculated directly from a hard sphere mixture equation of state, and other contributions from various types of intermolecular attraction, which are obtained by corresponding states from known values of similar contributions in a pure reference fluid. Shape factors are used to establish conformality between individual constituents and the reference fluid. This theoretically based approach represents composition dependenc

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Mukherjee, Goutam Dev. "A thermal expansion study of chemical, magnetic and superconducting order-disorder transformations." Thesis, 1996. http://hdl.handle.net/2009/982.

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Tseng, Wu-chun, and 曾武俊. "Chemical expansion and physical pressure effects on the Kagome Cu3Bi(SeO3)2O2Cl." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/kps6gq.

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碩士<br>國立中山大學<br>物理學系研究所<br>105<br>In recent years, the frustrated spin system has been a popular research topic. In these systems, the magnetic ions have confined to peculiar lattice geometries that exhibits the exotic physical properties under external magnetic field and pressure, which are very much different from the general magnetic materials. The common frustrated-spin lattices have triangular lattice, Kagome lattice, spinel structure and pyrochlore lattice. 　　The Cu3Bi(SeO3)2O2Cl, belongs to type II multiferroic material, the spin 1/2 Cu2+ ions form the pseudo-Kagome lattice, is an inter

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KWON, YONG JUNG. "CONFORMAL SOLUTION METHOD WITH THE HARD CONVEX BODY EXPANSION THEORY FOR PREDICTING VAPOR-LIQUID EQUILIBRIA." Thesis, 1986. http://hdl.handle.net/1911/16079.

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Like the hard sphere expansion (HSE) theory, the hard convex body expansion (HCBE) theory separates any residual thermodynamic property into a contribution from molecular repulsion, which is calculated directly from a hard convex body (HCB) equation of state, and other contributions from molecular attraction, which are obtained by the corresponding states principle (CSP) using pure reference fluids. The HSE theory yields good agreement with the experimental thermodynamic data for light hydrocarbon mixture systems. However, there is a limit to molecular size and shape difference in mixtures whe

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Alfred, Simon. "The Identification and Characterization of New Small Molecule Probes of Cell Expansion and Cytokinesis." Thesis, 2006. http://hdl.handle.net/1807/29960.

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Plant form and structure is remarkably diverse encompassing a myriad of shapes and sizes, and is a result of coordinated instances of cell growth and division. This varied form and structure represents adaptive strategies enabling plants to exploit and endure their environment maximizing fitness. Common to both cell growth and division processes, is the requirement of growth material and effectors via the secretory system. The secretory system is a dynamic pathway of organelles connected via vesicular traffic, responsible for protein modification and delivery. Challenges in studying secretion

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Juo, Bing-shiun, and 卓炳勳. "Influence of Chemical Composition and Heat Treatment on Dimensional Stability of Low Thermal Expansion Cast Irons." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/19748529245282972840.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>101<br>In this study, three low thermal expansion ductile cast iron series, B1(1.8%C, 1.8%Si, 30%Ni, 5%Co), B2(2.0%C, 1.8%Si, 35%Ni) and B3(2.0%C, 2.0%Si, 30%Ni, 5%Co) with different chemical compositions and homogenization heat treatment conditions, together with a regular ductile cast iron and a 304 stainless steel, were selected for constrained thermal cyclic tests (30~200oC) to evaluate the dimensional stability of the alloys studied by comparing the changes in dimensions and shape of the test specimens. The experimental results indicate that the change rates al

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Mojahed, Hamed. "Sequence Development and Expansion of Zero J-Modulation Echo-Planar Chemical Shift Imaging in Three Dimensions (3D ZJ-EPSI)." Thesis, 2013. https://doi.org/10.7916/D83T9GK2.

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580,350 (35%) of 1,660,290 cancer patients are estimated to die in the US in 2013. Routine monitoring by X-Rays and CT scans are hazardous and evaluating this disease is time consuming. Magnetic Resonance Spectroscopy (MRS) has changed this mal-routine significantly in the past few years. MRS can help with better understanding of tumor pathology, study of tumor vascularization and progress, and having a predicting value for the treatment response and disease-free survival of the patients even before they start their treatment. Unfortunately, MRS is still not a common practice among the medical

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Jun-Hsian, Lao, and 羅俊祥. "Influence of Chemical Composition and Heat Treatment on Thermal Expansion Coefficient and Metallurgical Characteristics of High Ni (Co) Austenitic Irons." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/61768093123238185396.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>90<br>The objective of this research is to study the influence of chemical composition and heat treatment on thermal expansion coefficient of both flake and spheroidal graphite cast irons. In addition, recoveries of alloying elements on melting, solidification temperatures (liquidus and eutectic), and solidification shrinkages were evaluated in this study. The alloy design includes three different levels of C and Si (1.0%C+1.0%Si, 1.5%C+1.5%Si, and 2.0%C+2.0%Si), and three Ni-Co combinations (36%Ni, 33%Ni+3%Co, and 30%Ni+6%Co), with a constant NiE (Nickel Equivalent

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Negi, Avantika. "Developing a tunable, adaptive plasmid selection system to screen Aminoacyl-tRNA synthetase variants." Thesis, 2022. https://etd.iisc.ac.in/handle/2005/6005.

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The genetic code refers to a set of rules used by living organisms to translate information encoded within the genetic material (DNA/mRNA sequences) into proteins. All organisms generally encode 22 proteinogenic or canonical amino acids using the ribosomal machinery. By expanding the genetic code, it is possible to incorporate an unnatural amino acid (UAA) into proteins using the cellular translational apparatus. The incorporation of non-canonical amino acids having various functional properties into proteins has garnered significant interest in recent years. Over 200 non-canonical amino acids

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O'Donnell, Kane. "Field ionization detection for atom microscopy." Thesis, 2010. http://hdl.handle.net/1959.13/802939.

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Research Doctorate - Doctor of Philosophy (PhD)<br>Helium has the highest ionization energy of any species and is as a consequence difficult to detect by conventional means. On the other hand, it is the ideal surface probe, having no net charge or spin, a low mass and a short de Broglie wavelength. Therefore, there exists a strong incentive to develop a microscopy technique based on helium atom scattering. The purpose of this thesis is to investigate in detail how an efficient helium detector might be developed using the phenomenon of field ionization, an ionization method that relies on quant

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O'Donnell, Kane. "Field ionization detection for neutral atom microscopy." 2010. http://hdl.handle.net/1959.13/802939.

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Research Doctorate - Doctor of Philosophy (PhD)<br>Helium has the highest ionization energy of any species and is as a consequence difficult to detect by conventional means. On the other hand, it is the ideal surface probe, having no net charge or spin, a low mass and a short de Broglie wavelength. Therefore, there exists a strong incentive to develop a microscopy technique based on helium atom scattering. The purpose of this thesis is to investigate in detail how an efficient helium detector might be developed using the phenomenon of field ionization, an ionization method that relies on quant

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Chittoori, Bhaskar Chandra Srinivas. "Clay mineralogy effects on long-term performance of chemically treated expansive clays." 2008. http://hdl.handle.net/10106/1809.

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Mandur, Jasdeep Singh. "Robust Algorithms for Optimization of Chemical Processes in the Presence of Model-Plant Mismatch." Thesis, 2014. http://hdl.handle.net/10012/8526.

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Process models are always associated with uncertainty, due to either inaccurate model structure or inaccurate identification. If left unaccounted for, these uncertainties can significantly affect the model-based decision-making. This thesis addresses the problem of model-based optimization in the presence of uncertainties, especially due to model structure error. The optimal solution from standard optimization techniques is often associated with a certain degree of uncertainty and if the model-plant mismatch is very significant, this solution may have a significant bias with respect to the act

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Višňák, Jakub. "Kvantově chemické algoritmy pro kvantové počítače." Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-310395.

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Title: Quantum computing algorithms for quantum chemistry Author: Jakub Višňák Abstract: The topic of this study is the simulation of the quantum algorithm for the diagonalization of the matrix representation of the all-electron Dirac-Coulomb hamiltonian of the SbH molecule. Two different limited CI expansions were used to describe both the ground state (X 0+ ) and the first excited doublet (A 1) by simulating the Iterative Phase Estinamtion Algorith (IPEA). In the simulations numerically performed in this work, the "compact mapping" has been employed for the representation of the evolution op

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