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Dissertations / Theses on the topic 'DSC Analysis'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Pereira, Thereza Mylene de Moura. "Caracteriza??o t?rmica (TG/DTG, DTA, DSC, DSC-fotovisual) de Horm?nios bioid?nticos (estriol estradiol)." Universidade Federal do Rio Grande do Norte, 2013. http://repositorio.ufrn.br:8080/jspui/handle/123456789/13478.

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Made available in DSpace on 2014-12-17T14:16:30Z (GMT). No. of bitstreams: 1 TherezaMMP_DISSERT.pdf: 3247575 bytes, checksum: b56626eecb3cf571b5b30d6c0ab92d04 (MD5) Previous issue date: 2013-03-22<br>Bioidentical hormones are defined as compounds that have exactly the same chemical and molecular structure as hormones that are produced in the human body. It is believed that the use of hormones may be safer and more effective than the non-bioidentical hormones, because binding to receptors in the organism would be similar to the endogenous hormone. Bioidentical estrogens have been used in meno

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Yuan, Shuming. "Optical-DSC for analysis of energy processes in transparent microscopic systems." Access restricted to users with UT Austin EID, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3037031.

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Li, Hongbo. "FEM analysis with DSC modeling for materials in chip-substrate systems." Diss., The University of Arizona, 2003. http://hdl.handle.net/10150/280363.

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In electronic packaging, solder joints in surface mount technology are used for not only electrical connections, but mechanical connections as well. Due to the mismatch of the coefficients of thermal expansion of different components in chip-substrate systems, solder joints under thermal cycles could develop thermal stress inside and therefore experience fatigue failure after a certain number of load cycles. In this work, the disturbed state concept (DSC) model, a unified and hierarchical approach to model a variety of materials such as soils, rocks, ceramics, metals, and alloys, was appropria

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4

Shao, Changming 1959. "Implementation of DSC model for dynamic analysis of soil-structure interaction problems." Diss., The University of Arizona, 1998. http://hdl.handle.net/10150/282628.

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The Disturbed State Concepts (DSC) model, with simplified unloading/reloading formulation, is implemented in a nonlinear dynamic finite element program for porous media named DSC-DYN2D. It can perform static, two phase dynamic and consolidation analysis of soils and soil-structure interaction problems with the DSC model. The model and the computer procedure are verified by back predictions of laboratory tests of clay, steel-clay interfaces as well as a simulation of pile-soil interaction problem. The Disturbed State Concepts have been developed recently as a constitutive modeling approach. In

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Černý, Štěpán. "Využití multi-echo sekvencí pro DSC-MRI." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-242109.

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The task of this thesis is to study the subject of perfusion analysis based on dynamic imaging with T2/T2* contrast. The focus was on the acquisition commonly used for DSC-MRI and especially in the acquisition pulse sequences that use images with different echo time, so called Multi-echo sequence. Principles of dynamic measurement by magnetic resonance imaging, the role of contrast agents and their influence on the relaxation times are described. It also describes the problems perfusion analysis, measurement and mathematical modeling parameters entering to the convolution dependency for gettin

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Byakova, A. V., V. V. Cherednichenko, A. A. Scheretskiy, A. A. Vlasov, and A. I. Yurkova. "Structural Evolution and Phase Transformation in Nanoquasicrystalline Al-Fe-Cr Alloy: DSC Analysis." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/34854.

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Kinetic parameters for microstructural evolution and phase transformation in water atomized Al-Fe-Cr based alloy with nominal composition Al94Fe3Cr3 have been examined by means of developed precise method of DSC technique and confirmed by the results of XRD analysis. Two exothermic reactions including that with a maximum at 380 – 400 degrees Celsius has been ascribed to dislocation reorganisation and recrystallisation process within the Al matrix although the main exothermic reaction with a maximum around 540 degrees Celsius arose from decomposition of icosahedral quasicrystalline part

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Porto, Dayanne Lopes. "Contribui??es sobre estudos t?rmicos (TG/DTG, DTA, DSC e DSC-Fotovisual) da rifampicina e seus principais produtos de degrada??o." Universidade Federal do Rio Grande do Norte, 2014. http://repositorio.ufrn.br:8080/jspui/handle/123456789/13506.

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Made available in DSpace on 2014-12-17T14:16:37Z (GMT). No. of bitstreams: 1 DayanneLP_DISSERT.pdf: 9773593 bytes, checksum: c2be9b4f3b701218666100df5b460f30 (MD5) Previous issue date: 2014-03-24<br>Since its synthesis over 48 years rifampicin has been extensively studied. The literature reports the characterization of thermal events for rifampicin in nitrogen atmosphere, however, no characterization in synthetic air atmosphere. This paper aims to contribute to the thermal study of rifampicin through thermal (TG / DTG, DTA, DSC and DSC - FOTOVISUAL ) and non-thermal (HPLC, XRPD , IR - FTIR ,

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Fraga, Rivas Iria. "Study of thermal transitions in polymers by a multifrequency modulated DSC technique." Doctoral thesis, Universitat Politècnica de Catalunya, 2010. http://hdl.handle.net/10803/73029.

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Differential Scanning Calorimetry (DSC) is one of the most widely used thermal analysis techniques for the study of transitions and relaxation processes in polymers and also in other materials. It measures the heat flow as a function of time and/or temperature, and determines the energy released or absorbed by a sample when it is heated (cooled) or maintained at a constant temperature. Its advantages are that it is fast and sensitive, the amount of sample needed is small (~mg), it could be in the liquid or solid state and the sample preparation is easier than for some other techniques. Neve

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Gundogar, Sati Asli. "Thermal Characterization And Kinetics Of Crude Oils By Tga And Dsc Methods." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12611502/index.pdf.

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In recent years, the application of thermal analysis to study the combustion and pyrolysis behavior of fossil fuels has gained a wide acceptance because of its significance for industry and economy. In this thesis, the thermal and kinetic analysis of different origin crude oil samples are performed by two well-known thermal analysis techniques: Differential Scanning Calorimetry (DSC) and Thermogravimetry (TG/DTG). The investigation of combustion and pyrolysis behaviors, kinetic analysis of oil samples and the determination of heating rate effect are the main objectives of this study. Six diffe

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10

Laplante, Michelle. "An investigation of the interactions between organic contaminants and various humic acids by DSC analysis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0012/MQ35019.pdf.

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SANTOS, SAMANTHA FONSECA DOS. "DSC, DMA, XPS, CONTACT ANGLE E AFM ANALYSIS OF DE ACC/PHAMCL THICK FILMS SURFACES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2005. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=7887@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Neste trabalho, foram estudadas filmes poliméricos densos formadas por acetato de celulose (AcC) e polihidroxialkanoato de cadeia média PHAmcl, com diferentes concentrações relativas de cada polímero. Os filmes de PHAmcl/DAC foram preparadas a partir de soluções poliméricas, diluídas em dimetil cetona, na qual se realiza uma mistura com agitação contínua. Foram preparadas as amostras: AcC puro, PHAmcl puro e seis misturas com concentrações variando de 2 porcento a 12 porcento (m/v) de PHAmcl em AcC. Medidas de calorimetria

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Trindade, Nuno Miguel Passarinho. "Stochastic modeling of the thermal and catalytic degradation of polyethylene using simultaneous DSC/TG analysis." Master's thesis, Faculdade de Ciências e Tecnologia, 2012. http://hdl.handle.net/10362/8468.

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Dissertação para obtenção do Grau de Mestre em Engenharia Química e Bioquímica<br>In the present work a stochastic model to be used for analyzing and predicting experimental data from simultaneous thermogravimetric (TG) and differential scanning calorimetry (DSC) experiments on the thermal and catalytic degradation of high-density polyethylene (HDPE) was developed. Unlike the deterministic models, already developed, with this one it’s possible to compute the mass and energy curves measured by simultaneous TG/DSC assays, as well as to predict the product distribution resulting from primary cra

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13

Alves, Ricardo. "Estudo termoanalítico e de compatibilidade fármaco-excipiente de rifampicina e alguns medicamentos utilizados na terapêutica da tuberculose." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/9/9139/tde-31032008-162730/.

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Este trabalho teve por objetivo aplicar a análise térmica e outras técnicas físico-químicas e analíticas ao desenvolvimento e controle de qualidade de fármacos e medicamentos para tratamento de tuberculose, em especial a rifampicina. A calorimetria exploratória diferencial (DSC), termogravimetria/termogravimetria derivada (TG/DTG), análise elementar, espectrometria de absorção na região do infravermelho (IV) e difratometria de raios X (DRX) foram as principais ferramentas utilizadas. Estas técnicas permitiram: avaliar a estabilidade térmica e o processo de decomposição térmica da rifampicina e

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Gul, Kiymet Gizem. "Thermal Characterization And Kinetic Analyis Of Sara Fractions Of Crude Oils By Tga And Dsc Methods." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613614/index.pdf.

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In this thesis, four different crude oil samples and their saturate, aromatic and resin fractions were analyzed by two different thermoanalytical methods, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The experiments were performed at three different heating rates (5, 10 and 15 &deg<br>C/min) under air atmosphere. Same gas flow rate and same pressure were applied to all samples. The aim is to determine the kinetic analysis and combustion behavior of crude oils and their fractions and also determining the effect of heating rate on all samples. For all samples

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Nunes, Ronaldo Spezia. "Estudo do comportamento térmico de alguns aditivos alimentares por TG/DTG, DTA e DSC." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/75/75132/tde-25082009-161837/.

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Estudos termoanalíticos de alguns aditivos alimentares da classe dos realçadores de sabor foram desenvolvidos visando avaliar sua estabilidade e resistência durante o preparo de alimentos a quente assim como investigar os eventuais intermediários de decomposição que poderiam resultar destes processos. Os sais foram obtidos de fontes industriais ou sintetizados e submetidos à caracterização por análise elementar, espectrometria vibracional na região do infra-vermelho, termogravimetria/termogravimetria derivada, análise térmica diferencial e em alguns casos, calorimetria exploratória diferencial

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Topa, Ece Hatice. "Thermal Characterization And Kinetics Of Diesel, Methanol Route Biodiesel, Canola Oil And Diesel-biodiesel Blends At Different Blending Rates By Tga And Dsc." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612460/index.pdf.

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Application of thermogravimetric analysis to the renewable energy sources is a novel study and it has been becoming attractive by the researchers in recent years. In this thesis, thermal and kinetic properties of biodiesel as new energy source, diesel and canola oil have been analyzed by using very popular thermogravimetric analysis methods which are<br>Differential Scanning Calorimetry (DSC) and Thermogravimetry (TGA/DTG). The main aim of the study is to observe the combustion and pyrolysis behaviour of methanol route biodiesel and diesel blends at different blending rates. Additionally, comb

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Lv, Yating. "Application of resting-state fMRI methods to acute ischemic stroke." Doctoral thesis, Universitätsbibliothek Leipzig, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-126910.

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Diffusion weighted imaging (DWI) and dynamic susceptibility contrast-enhanced (DSC) perfusion-weighted imaging (PWI) are commonly employed in clinical practice and in research to give pathophysiological information for patients with acute ischemic stroke. DWI is thought to roughly reflect the severely damaged infarct core, while DSC-PWI reflects the area of hypoperfusion. The volumetric difference between DWI and DSC-PWI is termed the PWI/DWI-mismatch, and has been suggested as an MRI surrogate of the ischemic penumbra. However, due to the applicat

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Othman, Daryan Jalal. "The influence of adhesive curing temperature upon the performance of FRP strengthened steel structures at ambient and elevated temperatures." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/29646.

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The structural adhesives widely used in structural strengthening applications are thermoset ambient cure adhesive polymers. At ambient temperatures, these polymers are in a relatively hard and inflexible state. At higher temperatures, the material becomes soft and flexible. The region where the molecular mobility changes dramatically is known as the glass transition temperature Tg and often is presented as a single value. Epoxy polymers exhibit a significant reduction in mechanical properties near glass transition temperature Tg when they are exposed to elevated temperatures. Glass transition

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Goulart, Lenice Lins. "O canto das senhoras :An?lise do discurso do sujeito coletivo (DSC) de velhas mulheres da Ponta do Tubar?o, no Rio Grande do Norte." Universidade Federal do Rio Grande do Norte, 2007. http://repositorio.ufrn.br:8080/jspui/handle/123456789/13772.

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Made available in DSpace on 2014-12-17T14:20:22Z (GMT). No. of bitstreams: 1 LeniceLG.pdf: 1939280 bytes, checksum: 3a5f29cfde1417a1ef11514bfeeec6fe (MD5) Previous issue date: 2007-05-04<br>The participation of women of more than 60 years of age in the social ritual of the creation of the Reserva de Desenvolvimento Sustent?vel Estadual ( Sustainable Development State Reserve ) at Ponta do Tubar?o, in the state of Rio Grande do Norte, is the central object of this research. This work is an attempt to analyze the oral discourse of these women, to understand the historical participation in this

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Oliveira, Floripes Ferreira de. "Contribuição da análise térmica no desenvolvimento de formulações de batons." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/46/46133/tde-02122015-141614/.

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Este trabalho consiste na caracterização química, física e termoanalítica de algumas amostras de batons e dos componentes de suas formulações. O estudo termoanalítico foi desenvolvido a partir das técnicas TG/OTG sob atmosfera dinâmica de ar ou enriquecida com O2 e por DSC sob atmosfera dinâmica de N2, com razão de aquecimento de 10°C min-1 em ambos os casos. Os testes de estabilidade com exposição das amostras a 4, 25 e 43°C e à luz solar indireta permitiram avaliar as propriedades organolépticas, físicas e térmicas. Os resultados da análise de ponto de fusão obtidos pelo método convencional

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Ramos, Luiz Antonio. "Investigação do comportamento térmico e de polimorfismo do anti-histamínico loratadina." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/75/75132/tde-04082011-143805/.

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O comportamento térmico, a obtenção e caracterização de formas cristalinas do anti-histamínico loratadina foram investigado. A escolha do anti-histamínico loratadina como objeto de estudo resulta do seu interesse farmacológico. A loratadina é a Denominação Comum Internacional (DCI) dada ao etil 4-(8-cloro-5,6-dihidro-11H-benzo[5,6]cicloheptano[1,2-b]piridino-11-ilideno)-1-piperidinocarboxilato, que é um potente antialérgico e anti-histamínicos tricíclico, não-sedativo de ação prolongada. Formas cristalinas foram preparadas e estudadas com vista à identificação de formas polimórficas. Os solven

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22

Ali, H. R. H. "Vibrational spectroscopic techniques (Raman, FT-IR and FT-NIR spectroscopy) as a means for the solid-state structural analysis of pharmaceuticals." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/3343.

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The aim of this work was to assess the suitability of vibrational spectroscopic techniques (Raman, FT-IR and FT-NIR spectroscopy) as a means for the solid-state structural analysis of pharmaceuticals. Budesonide, fluticasone propionate, salbutamol hemisulfate, terbutaline hemisulfate, ipratropium bromide, polymorphic forms of salmeterol xinafoate and two polymorphic forms of sulfathiazole were selected since they are used in the management of certain respiratory disorders and from different chemical and pharmacological entities along with some pharmaceutical excipients. Conventional visual exa

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Neres, Renata Aparecida. "Caracterização térmica de amostras de esponja sintética dupla face e palha de aço." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/46/46136/tde-23012015-100142/.

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Este trabalho tem por objetivo a caracterização comparativa do comportamento de degradação e/ou decomposição térmica da esponja sintética dupla face, base poliuretana (parte amarela e parte verde), e da palha de aço, a partir das técnicas termoanalíticas. As esponjas sintéticas para limpeza doméstica, em substituição à palha de aço, apesar da vantagem econômica, podem apresentar restrições de descartes para o meio ambiente ou expor o usuário a riscos de contaminação. Amostras de esponja sintética dupla face (verde e amarela) e de palha de aço foram caracterizadas por análise térmica (TG/DTG, D

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24

Venumuddala, Hareesha Reddy. "Study of Drug Delivery Behavior Through Biomembranes Using Thermal And Bioanalytical Techniques." Cleveland State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=csu1295472144.

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Genty, Sébastien. "Physico-chimie d'adhésifs polymérisés par voie non conventionnelle et adhérence sur alliage base aluminium." Thesis, Toulouse, INPT, 2018. http://www.theses.fr/2018INPT0132/document.

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L’utilisation d’adhésifs polyépoxy et plus particulièrement de pâte de calage dans l’aéronautique est chose très courante. L’augmentation des cadences de production des aéronefs poussent les fournisseurs à adapter les temps technologiques de ces produits (temps d’application et de complète polymérisation) : ainsi, la cinétique de réticulation des adhésifs de demain devra être lente à température ambiante et pouvant être accélérée à tout moment. Pour cela, la piste envisagée pour ces tra-vaux est la polymérisation sous rayonnement infrarouge. La cinétique de ré-action a été évaluée par analyse

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Schumacher, Andrea Bordin. "Potencial de utilização de análises de imagens e análises térmicas na cristalização de açúcares em leite condensado." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/131038.

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O leite condensado é um produto amplamente estudado, sendo que os problemas de cristalização ao longo do processo constituem um dos aspectos de interesse quando se considera a produção em escala industrial. No entanto, não foram encontrados estudos que padronizassem técnicas de medida de tamanho de cristais e determinação da cristalinidade total em leite condensado. Este trabalho visa adaptar/desenvolver uma técnica especifica para análise de tamanho de cristais de lactose em leite condensado utilizando de microscopia juntamente com processamento e análise de imagem (software ImageJ). Além dis

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Campelo, Sandra Mara Wolff. "INCORPORAÇÃO DE POLIFENÓIS E ANTIOXIDANTES DE EXTRATOS DE ERVAMATE (Ilex paraguariensis) EM AMIDO DE CARÁ-MOELA (Dioscorea bulbifera Linn)." Universidade Estadual de Ponta Grossa, 2018. http://tede2.uepg.br/jspui/handle/prefix/2750.

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Isreb, Mohammad. "Thermal and rheological approaches for the systematic enhancement of pharmaceutical polymeric coating formulations : effects of additives on glass transition temperature, dynamic mechanical properties and coating performance in aqueous and solvent-free coating process using DSC, shear rheometry, dissolution, light profilometry and dynamic mechanical analysis." Thesis, University of Bradford, 2011. http://hdl.handle.net/10454/5527.

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Additives, incorporated in film coating formulations, and their process parameters are generally selected using a trial-and-error approach. However, coating problems and defects, especially those associated with aqueous coating systems, indicate the necessity of embracing a quality-by-design approach to identify the optimum coating parameters. In this study, the feasibility of using thermal and rheological measurements to help evaluate and design novel coating formulations has been investigated. Hydroxypropyl methylcellulose acetate succinate (HPMCAS), an enteric coating polymer, was used as t

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Macíček, Ondřej. "Pokročilé metody perfuzní analýzy v MRI." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-410312.

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This dissertation deals with quantitative perfusion analysis of MRI contrast-enhanced image time sequences. It focuses on two so far separately used methods -- Dynamic contrast-enhanced MRI (DCE-MRI) and Dynamic susceptibility contrast MRI (DSC-MRI). The common problem of such perfusion analyses is the unreliability of perfusion parameters estimation. This penalizes usage of these unique techniques on a regular basis. The presented methods are intended to improve these drawbacks, especially the problems with quantification in DSC in case of contrast agent extravasation and instability of the d

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Gustafsson, Joakim. "AUTOMATIC BRAKING DISC ANALYSIS SYSTEM." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-28217.

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Volvo Group Truck Technology has the ambition to automate parts of their routine service. Therefore a project was launched to investigate which parts of the routine that could be automated. The idea of this project is to lower the time spent on the service and also improve the working environment for the personnel. The purpose of this thesis is to develop and build a conceptional prototype for a low-cost crack detecting sensor. This thesis is a part of a larger proof of concept project which Volvo GTT runs in cooperation with Robotdalen and Robot Application Center (RAC). The work done in this

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Jadhav, Abhijit V. "Crosslinking of polyaniline with aryl azides and the photolysis of vinyl azides and azidopropanones." University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1204666531.

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Mikus, Nicholas A. "An analysis of disc carving techniques." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Mar%5FMikus.pdf.

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Hassan, Muhammad Zahir. "Thermal Deformation Analysis Disc Brake Squeal." Thesis, University of Leeds, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.505054.

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Modi, Sunny J. "Assessing the Feasibility of Poly-(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and Poly-(lactic acid) for Potential Food Packaging Applications." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1268921056.

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Benhadia, Abrehem M. A. "Evaluation of the critical parameters and polymeric coat performance in compressed multiparticulate systems." Thesis, University of Bradford, 2019. http://hdl.handle.net/10454/17459.

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Compression of coated pellets is a practical alternative to capsule filling. The current practice is to add cushioning agents to minimize the stress on the coated pellets. Cushioning agents however add bulkiness and reduce the overall drug loading capacity. In this study, we investigated the performance of compressed coated pellets with no cushioning agent to evaluate the feasibility of predicting the coat behaviour using thermo-mechanical and rheological analysis techniques. Different coating formulations were made of ethyl cellulose (EC) as a coating polymer and two different kinds of

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Lage, Laércio Gomes. "Poliuretanas: caracterização, avaliação estrutural e efeito induzido pela radiação gama." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/46/46132/tde-28032018-113201/.

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Poliuretana (PUR) é uma classe de polímeros que possui grupos uretânicos [-O-C(=O)-NH-] em sua estrutura e encontra diversas aplicações, inclusive na área biomédica. Esta versatilidade é devida ao uso de diferentes monômeros em sua síntese. O uso de isocianatos cicloalifáticos, um dos monômeros da PUR, é mais vantajoso em aplicações que requeiram uma maior estabilidade térmica e à radiação ultravioleta e maior resistência à hidrólise. Quando processadas inapropriadamente, as PUR baseadas em isocianatos aromáticos produzem compostos carcinogênicos, fato não observado para as PUR com isocianatos

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Pulugundla, Gautam. "CFD design analysis of ventilated disc brakes." Thesis, Cranfield University, 2008. http://dspace.lib.cranfield.ac.uk/handle/1826/6578.

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This thesis reports the numerical investigation of the automotive ventilated disc brake rotor. Disc brakes operate on the principle of friction by converting kinetic energy into heat energy. The main objective of a disc brake rotor is to store this heat energy and dissipate it as soon as possible. This work is carried out in a area where there is very limited understanding. Commercial CFD code FLUENT was used for carrying out the simulations with the rotor rotating in still air. Only one passage and blade were simulated as all the rotor passages were identical. Uniform temperatures were used o

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Koetniyon, Saiprasit. "Thermal stress analysis of automotive disc brakes." Thesis, University of Leeds, 2000. http://etheses.whiterose.ac.uk/2938/.

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A brake disc rotor forms pan of a foundation brake and rotates with the wheel hub assembly. The main function of a foundation brake is to generate a retarding torque by converting mechanical energy to thermal energy by virtue of the frictional work done in relative sliding at the rotor-pad interface. In practice, most brake discs arc made from cast iron and in use arc sometimes subjected to high thermal stresses which can lead to permanent plastic deformation and occasionally rotor cracking. The aim of the present work is to investigate the thermal response of such a cast iron brake disc using

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Penwill, Lynsey Ann. "Phenotype variability determination using Airy Disc analysis." Thesis, University of Exeter, 2013. http://hdl.handle.net/10871/15717.

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Rapid phenotype identification and screening is a relatively unexplored field compared with genotype screening probably owing to a lack of appropriate technology. The Lensless microscope has a large field of view and allows the capture of the diffraction pattern from a large number of cells simultaneously, its potential to screen growth phenotypes will be evaluated in this thesis. A simple algorithm has been developed to measure intensity changes in the Airy Disc First Fringe (ADFF) from which length and width dimensions can be derived from scattering objects with an accuracy of 5%, except for

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Sergent, Nicolas. "Analysis and optimisation of disc brake calipers." Thesis, Cranfield University, 2010. http://dspace.lib.cranfield.ac.uk/handle/1826/10196.

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Disc brake calipers are subjected to complex mechanical loading and interaction of individual components in a typical brake assembly makes design improvement very challenging. To analyse caliper behaviour, complex Finite Element models were created and successfully validated using a variety of experimental techniques, including exceptionally suitable Digital Image Correlation. A novel methodology to optimise caliper design was developed, using non-linear contact Finite Element Analysis and topology optimisation, to generate lightweight, high performance brake calipers. The method was used on a

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vautrin, claire. "Stabilité et Structure d'Agrégats Catanioniques." Phd thesis, Université de Versailles-Saint Quentin en Yvelines, 2004. http://tel.archives-ouvertes.fr/tel-00007523.

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Le système catanionique CTAOH - C13COOH - H2O étudié forme des colloïdes de charge contrôlée<br />lorsque les tensioactifs sont mis en solution. Le diagramme de phase établi ici présente des agrégats particuliers<br />(micelle, vésicule, disque, phase lamellaire). L'étude de la CMC a fait apparaître des interactions<br />fortes entre monomères : le coefficient d'interaction est de -10kT. Du point de vue microscopique, nous<br />avons montré par diffusion couplée WAXS et WANS que les chaînes alkyl s'organisent suivant un réseau<br />hexagonal et que les têtes ioniques conservent un ordre liquid

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Benarous, Maamar. "The analysis and design of brushless D.C. motors." Thesis, University of Bath, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267382.

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In modem computer systems electrical drives are used to rotate hard discs. These motors require special torque-speed characteristics. The speed of the hard disc must be constant in order for the unit to function correctly. One type of drive, which is used for hard discs is the brushless-DC-motor. This machine has permanent magnet excitation and a polyphase armature winding. It therefore takes the form of a synchronous machine, and in order to be brushless the armature winding is stationary and the excitation rotates. To run at adjustable speed a variable frequency supply is required. In the br

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Hoschouer, Clifford Jason. "Material Analysis of the Intervertebral Disc and the use of Flexible Bodies in Disc Modeling." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1321974899.

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Harrison, S. C. A. "Analysis and control of a brushless D.C. motor drive." Thesis, University of Southampton, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303095.

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Duranton, Coralie. "Fatigue analysis of two wheel‐ mounted brake disc designs." Thesis, KTH, Spårfordon, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-177313.

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Due to a need of more compact bogies, the brake discs can be mounted on the railway wheels, bolted through the wheel web. Thus, the wheels are drilled and have multiple areas of contact with the brake discs. To establish maintenance procedures that will be applied to the wheels, SNCF used the feedback from experience (as with the train AGC) which gives perfect performance in terms of safety. However, to optimize the maintenance process, numerical simulations may be preferred since they are less conservative. This report describes the numerical simulatio

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Fieldhouse, John David. "An analysis of disc brake noise using holographic interferometry." Thesis, University of Huddersfield, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358314.

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A predominantly experimental approach using the whole body visual technique of holographic interferometry is employed to investigate the mechanisms involved during a noisy brake application. Following the modal analysis of component parts, dynamic trials include the development of the holographic technique, making use of mirrors to permit three orthogonal views of the brake to be recorded simultaneously with smaller inset mirrors allowing for additional areas, such as the ends of the piston pad, to be observed at the same time. These dynamic experiments take the form of changing the operating

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Thuppal, Vedanta Srivatsan, and Naga Vamsi Krishna Kora. "HEAT TRANSIENT TRANSFER ANALYSIS OF BRAKE DISC /PAD SYSTEM." Thesis, Blekinge Tekniska Högskola, Institutionen för maskinteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-13461.

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Braking is mainly controlled by the engine. Friction between a pair of pads and a rotating disc converts the kinetic energy of the vehicle into heat. High temperatures can be reached in the system which can be detrimental for both, components and passenger safety. Numerical techniques help simulate load cases and compute the temperatures field in brake disc and brake pads. The present work implements a Finite Element (FE) toolbox in Matlab/Simulink able to simulate different braking manoeuvres used for brake dimensioning mainly in the early phase of car development process. The brake pad/disc

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Ellis, Robert A. (Robert Adams). "The computer industry--strategic analysis of DEC and IBM." Thesis, Massachusetts Institute of Technology, 1987. http://hdl.handle.net/1721.1/14831.

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Paz, Simone Patricia Aranha da. "Desenvolvimento e otimização de métodos de controle de qualidade e de processo de beneficiamento para bauxitas gibbsíticas tipo-Paragominas." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3134/tde-22092016-100712/.

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Desde a prospecção do minério bauxita, passando pelo seu beneficiamento até a sua entrada no processo Bayer, tem-se como principais índices de qualidade e de processo os parâmetros químicos: alumina aproveitável (Al2O3Ap) e sílica reativa (SiO2Re), determinados segundo um procedimento que simula a digestão Bayer em escala de laboratório. Uma grande inovação para a indústria da bauxita seria fazer o controle por parâmetros mineralógicos, % gibbsita e % caulinita, via difratometria de raios X, intenção buscada nesse trabalho pela proposta de um método combinado Rietveld-Le Bail-Padrão Interno, c

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John, Jo-Anne Louise. "An investigation into compliance and the rotating disc." Thesis, University of Birmingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369721.

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