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Marks, Kimm Marie. "Nakedness in Contemporary Performance: The Naked Body in Three Works by Bill T. Jones, Ann Carlson, and Ron Athey." The Ohio State University, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=osu1392820358.
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Carlson, John Scott. "Hard red spring and hard red winter wheat protein premiums and price differences in the Pacific Northwest market." Thesis, Montana State University, 1993. http://etd.lib.montana.edu/etd/1993/carlson/CarlsonJ1993.pdf.
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The purpose of this study was to forecast protein premiums and price differences for hard red spring and hard red winter wheat in the Pacific Northwest market. Models were estimated using the ordinary least squares and Cochrane-Orcutt procedures. Forecast results were evaluated using Theil's U statistic. The cumulative effect of three supply factors; hard red spring wheat supply, hard red winter wheat supply and Canadian wheat supply; provided the best forecast model of spring wheat protein premiums. Another model using different combinations of these factors provided a similar forecast. No model provided an adequate forecast of winter wheat protein premiums. Price differences were forecasted primarily by wheat supply. The addition of export demand to this model improved the forecast. The addition of average crop protein content to this model improved the forecast for some price differences. Another model using wheat supply and the Canadian-United States exchange rate provided an adequate forecast model.
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Larsson, Leo. "Carlson type inequalities and their applications." Doctoral thesis, Uppsala : Univ. : Matematiska institutionen, Univ. [distributör], 2003. http://publications.uu.se/theses/91-506-1654-4/.
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Patterson, David Josh. "A Tale of Two Carlos: An Examination of the Ongoing Battle Between the Marginalized and the Privileged as Exemplified by Carlo Goldoni and Carlo Gozzi During the 18th Century." DigitalCommons@USU, 2011. https://digitalcommons.usu.edu/etd/1006.
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This thesis explores the lives and works of Carlo Gozzi and Carlo Goldoni. Specific emphasis is placed on their feud, positions in society, the motivations behind their theatrical styles, and the ways they used theatre to either attempt to maintain the status quo (Gozzi) or strive for social change (Goldoni). Contrary to previous studies, this study suggests that Goldoni tried to influence the world around him, rather than merely reflect it. This study examines the above through the lens of several twentieth century theories including semiotics, structuralism, and the avante-garde. The contents of this work are essential to anyone seeking biographical information, doing dramaturgical research or producing one of their plays, and those investigating the ways theatre has been used to incite change and create an atmosphere of social equity. This work demonstrates that theatre can, has been, and should be actively used to influence that change.
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Carlson, Kelsey [Verfasser], and Agnieszka [Akademischer Betreuer] Wykowska. "Linking action and perception : theory and application / Kelsey Carlson ; Betreuer: Agnieszka Wykowska." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2016. http://d-nb.info/1120302471/34.
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Waseen, Amber. "Carlos Chávez and the corrido." Connect to this title online, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=bgsu1131048508.
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Waseen, Amber Donna. "Carlos Chávez and the Corrido." Bowling Green State University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1131048508.
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Oliveira, Filho Itamar Sales de. "Time-frequency analysis : The bilinear Hilbert transform and the Carleson theorem." reponame:Repositório Institucional da UFC, 2016. http://www.repositorio.ufc.br/handle/riufc/18888.
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OLIVEIRA FILHO, Itamar Sales de. Time-frequency analysis : the bilinear Hilbert transform and the Carleson theorem. 2016. 109 f. Dissertação (Mestrado em Matemática em Rede Nacional) – Centro de Ciências, Universidade Federal do Ceará, Fortaleza, 2016.Submitted by Rocilda Sales (rocilda@ufc.br) on 2016-08-03T13:04:26Z No. of bitstreams: 1 2016_dis_isoliveirafilho.pdf: 1052932 bytes, checksum: 65cea71bb69c14d263414a81de75c8d8 (MD5)
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In 1966, Lennart Carleson proved that the Fourier series of a periodic function, square integrable over a fundamental domain of the real line converges to the same function almost everywhere. This result was revisited years later by Charles Fe erman (1973) and by Lacey and Thiele (2000). It is studied here Lacey and Thiele's work, where they approached the problem through time-frequency analysis. This proof was inspired in a previous work of theirs, where they establish boundedness for the bilinear Hilbert transform in Lebesgue spaces. The study of boundedness for this operator started with the attempts to establish boundedness for the first Calderon's commutator. Also through time-frequency analysis, it will be studied one of the works of Lacey and Thiele about the bilinear Hilbert transform.
Em 1966, Lennart Carleson provou que a série de Fourier de uma função periódica, quadrado-integrável em um domínio fundamental na reta converge para a prápria função em quase todo ponto. Esse resultado foi revisitado alguns anos depois por Charles Fefferman (1973) e por Lacey e Thiele (2000). É estudado aqui o trabalho desses ultimos, onde o problema é abordado através de análise de tempo e frequência. Essa demonstração foi inspirada em um trabalho anterior dos mesmos autores em que estabelecem limitação para a transformada de Hilbert bilinear em espaços de Lebesgue. O estudo da limitação desse operador começou com as tentativas de estabelecer limitação para o primeiro comutador de Calderón. Também sob o ponto de vista da análise de tempo e frequência, será estudado um dos trabalhos de Lacey e Thiele sobre a transformada de Hilbert bilinear.
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Ryan, Colleen. "Youth "at risk" in Ottawa-Carleton: A needs assessment." Thesis, University of Ottawa (Canada), 1992. http://hdl.handle.net/10393/7598.
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The purpose of this thesis is to assess the service needs of area youth "at risk". The main findings of this research indicate that persistent and serious adolescent offenders were more likely to have more negative composite profiles. In particular, they were more likely to come from families with: a single parent; another member with a criminal history; a lower class background; alcoholism; and poor relationships within the family. Similarly, persistent and serious adolescent offenders were significantly more likely to: be unemployed and not in school; be truant; and have dropped out of school. It was also discovered that area persistent and serious adolescent offenders were more likely to: have negative motivation/response to present intervention; have rejected or expelled from another program/service; be more aggressive; abuse alcohol and drugs; and have negative attitudes toward both their delinquency and the criminal justice system. Area social service agencies must begin to make more creative and effective use of existing resources. The educational system must recognize and capitalize upon its role in identifying youth "at risk". Finally, agents of the criminal justice system, particularly the police, must begin to become more involved in community-based interagency initiatives which focus on the preventative or proactive role of their activities. (Abstract shortened by UMI.)
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Turton, Jackie. "The fiction and fictionalising of William Carleton." Thesis, University of Liverpool, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.490910.
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William Carleton, widely acknowledged to be the most important Irish writer of the nineteenth century, has, nevertheless, been subject to little rigorous examination. This neglect stems, firstly, from the notoriety he gained early in his career. An Ulster peasant by birth, and a convert to Protestantism in early adulthood, he commenced his career as a writer by attacking the Catholic Church into which he had been baptised. Consequently, despite his later skilful and sympathetic depictions of the Catholic peasant classes he knew so well, Irish attitudes towards him long remained ambivalent, and neither his work, nor his life, received the critical attention they deserved. Secondly, the fact that there is relatively little authoritative information on Carleton has further discouraged any proper investigation of what evidence is available, a fact which has reinforced a tendency for erroneous suppositions about Carleton to remain, not only uncorrected, but repeatedly cited as fact. This thesis, the aim of which is to present a corrective analysis of the author and his writings, is the first study to properly redress that failure. It pursues those lines of inquiry which, in the judgement of the writer, are most productive for the purpose of explicating the complexities of Carleton's work and character. The fundamental issues with which this thesis engages are ones of identity and identification; those imposed upon Carleton and those he sought for himself. The opening chapter gives a critical overview of the way in which scholars have presented Carleton, from the nineteenth century until the present day. A dearth of primary source material has made him an easy subject for appropriation; once vilified as an apostate, his more recent fate has been to be defined by the Famine. The second chapter examines how Carleton's personal identity was connected to the matter of his religious affiliation. The misinterpretation of circumstances connected to Carleton's shift of religious identity - an error corrected in this chapter of the study - provides the most obvious example of widespread critical neglect which he has suffered. Chapter three assesses the way in which Carleton's changing religious attitudes are reflected in his fictional writing. The final three chapters together constitute an examination of Carleton's literary identity. Chapter four proposes that Carleton can be understood as standing in the tradition of the senachie, as one who found his voice, and gained his reputation, by identifying with the peasant classes with which he was familiar. The penultimate chapter addresses Carleton's self-image as a young man, and the way in which both his empathy and identification with particular human types is expressed through his fiction. The final chapter examines Carleton's decline, as, confronted by the limits of his own imaginative capabilities, he wrestled with a form to which his talents were ill-adapted, and with subjects with which he could not properly identify.
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Janzon, Krister. "Monte Carlo Path Simulation and the Multilevel Monte Carlo Method." Thesis, Umeå universitet, Institutionen för fysik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-151975.
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A standard problem in the field of computational finance is that of pricing derivative securities. This is often accomplished by estimating an expected value of a functional of a stochastic process, defined by a stochastic differential equation (SDE). In such a setting the random sampling algorithm Monte Carlo (MC) is useful, where paths of the process are sampled. However, MC in its standard form (SMC) is inherently slow. Additionally, if the analytical solution to the underlying SDE is not available, a numerical approximation of the process is necessary, adding another layer of computational complexity to the SMC algorithm. Thus, the computational cost of achieving a certain level of accuracy of the estimation using SMC may be relatively high. In this thesis we introduce and review the theory of the SMC method, with and without the need of numerical approximation for path simulation. Two numerical methods for path approximation are introduced: the Euler–Maruyama method and Milstein's method. Moreover, we also introduce and review the theory of a relatively new (2008) MC method – the multilevel Monte Carlo (MLMC) method – which is only applicable when paths are approximated. This method boldly claims that it can – under certain conditions – eradicate the additional complexity stemming from the approximation of paths. With this in mind, we wish to see whether this claim holds when pricing a European call option, where the underlying stock process is modelled by geometric Brownian motion. We also want to compare the performance of MLMC in this scenario to that of SMC, with and without path approximation. Two numerical experiments are performed. The first to determine the optimal implementation of MLMC, a static or adaptive approach. The second to illustrate the difference in performance of adaptive MLMC and SMC – depending on the used numerical method and whether the analytical solution is available. The results show that SMC is inferior to adaptive MLMC if numerical approximation of paths is needed, and that adaptive MLMC seems to meet the complexity of SMC with an analytical solution. However, while the complexity of adaptive MLMC is impressive, it cannot quite compensate for the additional cost of approximating paths, ending up roughly ten times slower than SMC with an analytical solution.
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Dickinson, Andrew Samuel. "On the analysis of Monte Carlo and quasi-Monte Carlo methods." Thesis, University of Oxford, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409715.
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Göncü, Ahmet. "Monte Carlo and quasi-Monte Carlo methods in pricing financial derivatives." Tallahassee, Florida : Florida State University, 2009. http://etd.lib.fsu.edu/theses/available/etd-06232009-140439/.
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Thesis (Ph. D.)--Florida State University, 2009.Advisor: Giray Ökten, Florida State University, College of Arts and Sciences, Dept. of Mathematics. Title and description from dissertation home page (viewed on Oct. 5, 2009). Document formatted into pages; contains x, 105 pages. Includes bibliographical references.
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Ekwegh, Ijeoma W. "Newsvendor Models With Monte Carlo Sampling." Digital Commons @ East Tennessee State University, 2016. https://dc.etsu.edu/etd/3125.
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Newsvendor Models with Monte Carlo Sampling by Ijeoma Winifred Ekwegh The newsvendor model is used in solving inventory problems in which demand is random. In this thesis, we will focus on a method of using Monte Carlo sampling to estimate the order quantity that will either maximizes revenue or minimizes cost given that demand is uncertain. Given data, the Monte Carlo approach will be used in sampling data over scenarios and also estimating the probability density function. A bootstrapping process yields an empirical distribution for the order quantity that will maximize the expected profit. Finally, this method will be used on a newsvendor example to show that it works in maximizing profit.
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Crosby, Richard S. "Monte Carlo methods for lattice fields." Thesis, Massachusetts Institute of Technology, 1989. http://hdl.handle.net/1721.1/77699.
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Good, James Alexander. "William Carlos Williams and the pastoral tradition." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ27785.pdf.
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Penn, Sheldon. "Carlos Fuentes's Terra nostra and the Kabbalah." Thesis, University of Birmingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368992.
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Frenk, Susan F. "Carlos Fuentes and the Latin American 'Boom'." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306404.
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Qiu, James Zhijan. "Polynomial approximation and Carleson measures on a general domain and equivalence classes of subnormal operators." Diss., This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-06062008-171825/.
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Moschetta, Massimiliano. "Carlo Michelstaedter Persuasion and rhetoric /." unrestricted, 2007. http://etd.gsu.edu/theses/available/etd-12132007-082309/.
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Thesis (M.A.)--Georgia State University, 2007.Title from file title page. Louis A. Ruprecht, Jr., committee chair; Angelo Restivo, Melissa Merritt, Christopher White, committee members. Electronic text (56 p.) : digital, PDF file. Description based on contents viewed Feb. 6, 2008. Includes bibliographical references (p. 54-56).
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Lin, Xichen. "Monte Carlo Simulation and Integration." Scholarship @ Claremont, 2018. https://scholarship.claremont.edu/cmc_theses/2009.
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In this paper, we introduce the Tootsie Pop Algorithm and explore its use in different contexts. It can be used to estimate more general problems where a measure is defined, or in the context of statistics application, integration involving high dimensions. The Tootsie Pop Algorithm was introduced by Huber and Schott[2] The general process of Tootsie Pop Algorithm, just like what its name suggests, is a process of peeling down the outer shell, which is the larger enclosing set, to the center, which is the smaller enclosed. We obtain the average number of peels, which gives us an understanding of the ratio between the size of the shell and the size of the center. Each peel is generated by a random draw within the outer shell: if the drawn point is located in the center, we are done, else we update the outer shell such that the drawn point is right on its edge.
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Chen, Xi. "Sequential Monte Carlo radio-frequency tomographic tracking." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=104844.
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Target tracking in over a small-scale area using wireless sensor networks (WSNs) is a technique that can be used in applications ranging from emergency rescue after an earthquake to security protection in a building. Many target tracking systems rely on the presence of an electric device which must be carried by the target in order to reports back its location and status. This makes these systems unsuitable for many emergency applications; in such applications device-free tracking systems that where no devices are attached to the targets are needed. Radio-Frequency (RF) tomographic tracking is one such device-free tracking technique. This system tracks moving targets by analyzing changes in attenuation in wireless transmissions. The target can be tracked within the sensor network area without being required to carry an electric device.Some previously-proposed device-free tracking approaches require a time-consuming training phase before tracking can be carried out, which is time-consuming. Others perform tracking by sacrificing part of the estimation accuracy. In this thesis, we propose a novel sequential Monte Carlo (SMC) algorithm for RF tomographic tracking. It can track a single target moving in a wireless sensor network without the system needing to be trained. The algorithm adopts a particle filtering method to estimate the target position and incorporates on-line Expectation Maximization (EM) to estimate model parameters. Based on experimental measurements, the work also introduces a novel measurement model for the attenuation caused by a target with the goal of improving estimation accuracy. The performance of the algorithm is assessed through numerical simulations and field experiments carried out with a wireless sensor network testbed. Both simulated and experimental results demonstrate that our work outperforms previous RF tomographic tracking approaches for single target tracking.Suivi de cible dans la zone à petite échelle en utilisant les réseaux de capteurs sans fil est une technique qui peut être largement utilisé dans des applications telles que le sauvetage d'urgence après un tremblement de terre, ou la protection de la sécurité dans un bâtiment. Beaucoup de systèmes de poursuite de cibles nécessitent un dispositif électrique réalisée par l'objectif de faire rapport de ses localisation instantanée et le statut. L'inconvénient rend ces systèmes ne conviennent pas pour des applications nombreuses interventions d'urgence, dispositif sans systèmes de suivi qui ne les périphériques connectés sur les objectifs sont nécessaires. Radio-Fréquence (RF) suivi tomographique est l'une des techniques dispositif de suivi-libres. Il s'agit d'un processus de suivi des cibles mobiles en analysant l'évolution de l'atténuation dans les transmissions sans fil. La cible peut être suivi dans la zone de réseau de capteurs, tandis que les appareils électriques ne doivent être effectués. Cependant, certaines approches précédentes dispositif de suivi-libre nécessite une phase d'entraînement avant de suivi, ce qui prend beaucoup de temps. Autres effectuer un suivi par scarification partie de précision de l'estimation.Dans cette thèse, nous proposons une nouvelle Monte Carlo séquentielles (SMC) algorithme de suivi RF tomographique. Il peut suivre une cible unique sans formation du système dans un réseau de capteurs sans fil. L'algorithme de filtrage particulaire adopte la méthode pour estimer la position cible et intègre en ligne Expectation Maximization (EM) pour estimer les paramètres du modèle. Sur la base de mesures expérimentales, le travail introduit également un modèle de mesure de roman pour l'atténuation provoquée par une cible pour améliorer la précision d'estimation. La performance de l'algorithme est évaluée par des simulations numériques et expériences sur le terrain avec un réseau de capteurs sans fil banc d'essai. Les deux résultats simulés et expérimentaux démontrent que notre travail surpasse précédente approche RF suivi tomographique pour le suivi de cible unique.
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Allardyce, Robin. "Institutionalization and innovation of instructional television at Carleton University." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0002/MQ44798.pdf.
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Lloyd, Jennifer A. "Numerical methods for Monte Carlo device simulation." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/12766.
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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1992.Includes bibliographical references (leaves 51-53).
by Jennifer Anne Lloyd.
M.S.
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Carlson, Cirsten [Verfasser], Kristin [Gutachter] Kersten, and Nivedita [Gutachter] Mani. "Elementary School L2 English Teachers’ Language Performance and Children’s Second Language Acquisition / Cirsten Carlson ; Gutachter: Kristin Kersten, Nivedita Mani." Hildesheim : Universitätsverlag Hildesheim, 2020. http://nbn-resolving.de/urn:nbn:de:gbv:hil2-opus4-10249.
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SILVA, VALTER RODRIGUES DA. "SÃO CARLOS AND ESTÁCIO: SAMBA, TRADITION, MEMORY AND TRANSIENCE." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2017. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=30838@1.
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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIROCOORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE SUPORTE À PÓS-GRADUAÇÃO DE INSTS. DE ENSINO
Este trabalho se propõe a discutir e analisar narrativas que constroem parte da história do Rio de Janeiro e, em particular, a constituição da comunidade que se divide entre as memórias do Morro de São Carlos e a tradição criada em torno do bairro do Estácio. Historicamente sem fronteiras significativas, o Estácio e o Morro de São Carlos parecem constituir um só corpo, em que pese o próprio relevo como um possível indicador de fronteira. A tradição de berço do samba, a criação da Deixa Falar, as escolas de samba do alto do Morro e o samba como síntese de tudo produzem uma memória coletiva que não se faz absoluta, mediante reivindicação de parcela da comunidade, pelo reconhecimento de uma suposta memória subterrânea. Da observação de um caráter transitório inerente ao lugar, das relações envolvendo gente, política, geografia, arte e cultura, e tendo a oralidade como fio condutor desta narrativa, o que propõe esta tese é tão somente contribuir com o acervo literário referente ao Morro de São Carlos, ao Estácio, à comunidade desses um só lugar e ao samba, como produto final que os imanta a todos.
This work proposes to discuss and analyze narratives that build part of the history of Rio de Janeiro and, in particular, the constitution of the community that divides between the memories of the São Carlos Hill and the tradition created around the Estácio neighborhood. Historically without significant frontiers, Estácio and São Carlos Hill seem to constitute a single body, in spite of its own relief as a possible frontier indicator. The tradition of cradle of the samba, the creation of the Deixa Falar, the samba schools from top of the hill and the samba as synthesis of everything produce a collective memory, which is not made absolute because a part of the community claims the recognition of a supposed underground memory. From the observation of a transitional character inherent to the place, of the relations involving people, politics, geography, art and culture, and having orality as the guiding thread of this narrative, what proposes this thesis is only to contribute with the literary collection referring to the São Carlos Hill, Estácio, the community of these one place and samba, as a final product that keep them attracted to each other.
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Souza, Valquíria Cordeiro de. "Carlos Zílio: entre instâncias política/utopia/estética." Universidade do Estado do Rio de Janeiro, 2014. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=7578.
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Esta pesquisa discorre, através das obras do artista Carlos Zílio, sobre pontos ora divergentes, ora complementares, tais como utopias, heterotopias, estética e política, pensamento utópico e pós-modernidade. Este artista foi selecionado levando em consideração o período de elaboração de suas obras, no qual havia uma profunda modificação na estrutura política do Brasil. As décadas de 1960/70, período de análise das obras, foram marcadas pelo Regime Militar brasileiro, que dentre das muitas ações, perseguiu aqueles que eram contrários às novas imposições governamentais. Tendo em vista essa datação das obras, as análises partem do engajamento político para o engajamento estético, fazendo uma comparação entre esses dois campos, discutindo as relações da arte com a política. Outro ponto de discussão das obras de Zílio é sua função utópica, após uma reavaliação deste conceito, que perde sua força onírica para se tornar um conceito relacionado a impulsos transformadores e políticos. Ao analisar obras deste período faz-se necessário a análise do conceito de pós-modernidade e o entrelaçamento com as utopias, considerados pensamentos antagônicos. Após as comparações entre todos os conceitos podemos intitular as obras e ações de Zílio como vida artista, conceito foucaultniano, que relaciona arte e vida dos artistas como uma ação inseparável. Zílio faz de sua vida uma ação estéticaThis research, through the work of artist Carlos Zílio, discusses on, at times complementary, at times divergent points such as utopias, heterotopias, aesthetics and politics, utopian thinking and postmodernity. This artist was selected taking into account the period of preparation of his pieces, when there was a profound change in the Brazilian political structure. The 1960s/70s, period of the pieces analyzed, were marked by the Brazilian military regime that, among many other actions, chased those who were opposed to the new government impositions. Given the time when the works were made, the analyzes goes from the political engagement to the aesthetic engagement, making a comparison between these two fields, discussing the relationship between art and politics. Another point of discussion of Zílios pieces is their utopian function, following a reassessment of the concept, which loses its dreamlike force to become a concept related to transforming and political impulses. By analyzing the pieces of this period, it is necessary to analyze the concept of postmodernity and the intertwining with utopias, considered antagonistic thoughts. After the comparisons between all the concepts, we title the works and actions of Zílio as artistic life, foucauldian perspective, which relates art and life of artists as an inseparable action. Zílio makes of his life an aesthetic action
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Jensen, Mattias, and Mikael Westlund. "Monte Carlo-simulation of whole-body absorbed." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-276422.
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Radiation protection is important when working in lab environments where radioactive sources are frequently used. Simplified geometrical models are sometimes used in literature or in education to analytically estimate the absorbed dose a human receives. This study investigates the accuracy of these models by comparing them to more advanced models and how the results differ if the dose is simulated in Geant4. Three cuboids with different shapes, and two more human-like models were used as the bodies that would receive the absorbed dose. It turned out, for such simplified cases, that the result seemed to be a factor of 1.6 - 3 times larger than the results achieved in the Geant4 simulation. This result is a consequence of the Compton scattering that occurs when the photons enter the bodies, a process which the analytical method does not account for. It also turned out that besides using a more human-like model, the closest result was given when the cuboids surface area was reduced to get a more human-like weight instead of its thickness.Strålskydd är viktigt inom jobbmiljöer där radioaktiva preparat förekommer ofta. Enkla geometriska modeller används ofta inom litteratur för att analytiskt uppskatta hur stor dos en person upptar. Den här rapporten diskuterar hur dessa modeller förhåller sig till mer avancerade modeller och hur annorlunda resultatet blir om dosen simuleras i Geant4. Tre rätblock med olika dimensioner och två mer människoliknande modeller har använts för att uppskatta den absorberande dosen. Det visade sig att resultatet var mellan 1.6 och 3 gånger större än resultatet som fås i Geant4simulationen. Detta är en konsekvens av Comptonspridningen som händer när en foton kommer in i kroppen och som inte tas hänsyn till i analytiska metoden. Det visade också sig att förutom de mer människoliknande modellerna så ges det bästa resultatet av att minska på rätblockets area istället för tjocklek för att rätblocket ska väga lika mycket som en människa.
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Perez, Ricardo Perez. "TRAJETÓRIA INTELECTUAL DE CARLOS MARIGHELLA: DO PCB À ALN." Pontifícia Universidade Católica de Goiás, 2017. http://tede2.pucgoias.edu.br:8080/handle/tede/3635.
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The present study is based on an analysis of the intellectual trajectory of Carlos Marighella. Consequently, the construction and ideological line adopted by the ALN, one of the most important guerrilla organizations formed in Brazil after the 1964 civilmilitary coup. Therefore, the established sieve essentially included the writings of Carlos Marighella, founder and leader of the aforementioned revolutionary organization. The incendiary combined the dynamism of practical revolutionary with an intense literary production. Marighella's writings merge with the nature of the leftist guerrilla organization - the ALN - in which the whole ideological and doctrinal structure is initiated, including "organizational principles," "tactical principles," and "strategic principles." Then, it is possible to highlight, in the process of maturity of its texts, the theoretical, ideological and practical construction proposed by Marighella for the ALN that will converge in the action as guiding principle of the organization, bringing to the surface the sui generis contribution of its ideas to the Revolutionary left. The period comprised by the research began in 1948 when party teaching debates initiated due illegality that the Brazilian Communist Party had initiated and ended in 1969 with the assassination of Carlos Marighella for military repression.
O presente trabalho debruça-se numa análise sobre a trajetória intelectual de Carlos Marighella. Ilumina-se, consequentemente, a construção e linha ideológica adotada pela ALN, uma das mais importantes organizações guerrilheiras formadas no Brasil após o golpe civil-militar de 1964. Para tanto, o crivo estabelecido, essencialmente, abarcou os escritos de Carlos Marighella, fundador e líder da organização revolucionária citada. O guerrilheiro conjugou o dinamismo de revolucionário prático a uma produção literária intensa. Os escritos de Marighella fundem-se à natureza da organização guerrilheira de esquerda – a ALN –, neles, toda a estrutura ideológica e doutrinária é lançada, incluindo os ―princípios organizativos‖, os ―princípios táticos‖ e os ―princípios estratégicos‖. Com isso, é possível evidenciar, no processo de maturidade de seus textos, a construção teórica, ideológica e prática proposta por Marighella para a ALN que convergirá na ação como princípio norteador da organização, trazendo à superfície a contribuição sui generis de suas ideias para a esquerda revolucionária brasileira. O período abrangido pela pesquisa inicia-se em 1948 quando dos debates de direcionamento partidário inaugurados devido à ilegalidade que o Partido Comunista Brasileiro fora lançado e finaliza-se em 1969 com o assassinato de Carlos Marighella pela repressão militar.
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Forte, Graziela Naclério 1969. "Carlos Prado : trajetória de um modernista aristocrata." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/281198.
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Orientador: Marcelo Siqueira RidentiTese (doutorado) - Universidade Estadual de Campinas, Instituto de Filosofia e Ciências Humanas
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Resumo: Esse trabalho de doutoramento tem o objetivo de analisar sob o ponto de vista histórico-social, o conjunto da obra de Carlos da Silva Prado (1908-1992), mais conhecido como Carlos Prado, atuante no modernismo como artista plástico, arquiteto e teórico da arquitetura funcional, no período 1930-1990. Com uma produção diversificada em termos de técnicas empregadas, estilos e temas, os trabalhos da fase popular ou folclórica, assim como os sociais, inclusive aqueles realizados sob o ponto de vista do urbanista, onde criou um panorama da urbe ao mesmo tempo moderna e com sérios problemas de infraestrutura, como a falta de transportes e moradias para as classes econômicas menos privilegiadas, relacionam-se entre si e evidenciam as diferenças entre progresso e atraso, ricos e pobres. Como hipótese de base, é possível dizer que Carlos Prado foi um pintor do modernismo paulista, que adotou a temática popular e social, imprimindo em seus trabalhos uma visão idealizada do passado sob o ponto de vista de um aristocrata, que absorveu a ideia de "brasilidade" defendida pelos críticos Mário de Andrade e Sérgio Milliet. O afastamento do sistema das artes plásticas na década de 1960 deve-se à atitude que assumiu de evitar a convivência com as pessoas uma vez que não se adaptou ao mundo capitalista, quando as artes plásticas também ficaram sujeitas às leis da oferta e demanda. Portanto temos como hipótese complementar que ele via no passado as bases para a construção de um futuro utópico, enquanto a modernidade parecia ignorar os valores humanos, incentivando o consumismo, o império do fetichismo da mercadoria e do dinheiro
Abstract: This PhD thesis analyzes from a social-historical point of view, the whole work by Carlos da Silva Prado (1908-1992), better known as Carlos Prado, an active painter of the modernism's scenario, architect and functional architecture theorist between 1930 to 1990. Presenting a wide variety of techniques, styles and themes, the popular or folk art, as well as the social art period, including the social art of urban point of view creating a metropolis panorama: at the same time modern and with serious infrastructure problems, such as transportation and housing for lower economic classes, showing the differences between progress and opposite situations, rich and poor. In our hypothesis, Carlos Prado was a São Paulo modernist painter, when adopted the popular and social themes, printing in his works an idealized view of the past from an aristocrat point of view, which absorbed the "brazilianness" idea by Mário de Andrade and Sérgio Milliet. He stood back the "arts system" in the 1960s due to the attitude he took to avoid interaction with people since he did not agree with the capitalism world rules, the period of time was incredibly under the rules of supply and demand. We have a complementary hypothesis. Prado was idealized the past, created an utopian way, while modernity seemed to ignore human values, encouraging consumerism, the empire of commodity fetishism and money
Doutorado
Sociologia
Doutora em Sociologia
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Tuttle, Sabrina. "The San Carlos Apache Reservation and Extension Programs." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2008. http://hdl.handle.net/10150/144739.
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4 pp.This fact sheet describes the socioeconomic and cultural aspects of the San Carlos Apache reservation, as well as the history of extension and effective extension programs and collaborations conducted on this reservation.
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Delgado, Maria Milagros. "Theatrical alienation and the films of Carlos Saura." Thesis, University of Newcastle Upon Tyne, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335885.
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Bohlin, Lars. "Inferens på rangordningar - En Monte Carlo-analys." Thesis, Örebro universitet, Handelshögskolan vid Örebro Universitet, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-46322.
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Li, Lulu Ph D. Massachusetts Institute of Technology. "Acceleration methods for Monte Carlo particle transport simulations." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/112521.
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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Nuclear Science and Engineering, 2017.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 166-175).
Performing nuclear reactor core physics analysis is a crucial step in the process of both designing and understanding nuclear power reactors. Advancements in the nuclear industry demand more accurate and detailed results from reactor analysis. Monte Carlo (MC) eigenvalue neutron transport methods are uniquely qualified to provide these results, due to their accurate treatment of space, angle, and energy dependencies of neutron distributions. Monte Carlo eigenvalue simulations are, however, challenging, because they must resolve the fission source distribution and accumulate sufficient tally statistics, resulting in prohibitive run times. This thesis proposes the Low Order Operator (LOO) acceleration method to reduce the run time challenge, and provides analyses to support its use for full-scale reactor simulations. LOO is implemented in the continuous energy Monte Carlo code, OpenMC, and tested in 2D PWR benchmarks. The Low Order Operator (LOO) acceleration method is a deterministic transport method based on the Method of Characteristics. Similar to Coarse Mesh Finite Difference (CMFD), the other acceleration method evaluated in this thesis, LOO parameters are constructed from Monte Carlo tallies. The solutions to the LOO equations are then used to update Monte Carlo fission sources. This thesis deploys independent simulations to rigorously assess LOO, CMFD, and unaccelerated Monte Carlo, simulating up to a quarter of a trillion neutron histories for each simulation. Analysis and performance models are developed to address two aspects of the Monte Carlo run time challenge. First, this thesis demonstrates that acceleration methods can reduce the vast number of neutron histories required to converge the fission source distribution before tallies can be accumulated. Second, the slow convergence of tally statistics is improved with the acceleration methods for the earlier active cycles. A theoretical model is developed to explain the observed behaviors and predict convergence rates. Finally, numerical results and theoretical models shed light on the selection of optimal simulation parameters such that a desired statistical uncertainty can be achieved with minimum neutron histories. This thesis demonstrates that the conventional wisdom (e.g., maximizing the number of cycles rather than the number of neutrons per cycle) in performing unaccelerated MC simulations can be improved simply by using more optimal parameters. LOO acceleration provides reduction of a factor of at least 2.2 in neutron histories, compared to the unaccelerated Monte Carlo scheme, and the CPU time and memory overhead associated with LOO are small.
by Lulu Li.
Ph. D.
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Xia, Yuan. "Multilevel Monte Carlo for jump processes." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:7bc8e98a-0216-4551-a1f3-1b318e514ee8.
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This thesis consists of two parts. The first part (Chapters 2-4) considers multilevel Monte Carlo for option pricing in finite activity jump-diffusion models. We use a jump-adapted Milstein discretisation for constant rate cases and with the thinning method for bounded state-dependent rate cases. Multilevel Monte Carlo estimators are constructed for Asian, lookback, barrier and digital options. The computational efficiency is numerically demonstrated and analytically justified. The second part (Chapter 5) deals with option pricing problems in exponential Lévy models where the increments of the underlying process can be directly simulated. We discuss several examples: Variance Gamma, Normal Inverse Gaussian and alpha-stable processes and present numerical experiments of multilevel Monte Carlo for Asian, lookback, barrier options, where the running maximum of the Lévy process involved in lookback and barrier payoffs is approximated using discretely monitored maximum. To analytically verify the computational complexity of multilevel method, we also prove some upper bounds on Lp convergence rate of discretely monitored error for a broad class of Lévy processes.
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Bakra, Eleni. "Aspects of population Markov chain Monte Carlo and reversible jump Markov chain Monte Carlo." Thesis, University of Glasgow, 2009. http://theses.gla.ac.uk/1247/.
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Bagherian, Fatemeh. "An evaluation of Carleton Hotline for Administration and Teaching CHAT." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0019/NQ48324.pdf.
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Roncon, Vera M. D. (Vera Maria Dias) Carleton University Dissertation Psychology. "Honesty instructions and compliance in the Carleton skills training package." Ottawa, 1993.
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Carlson, Cirsten [Verfasser], Kristin [Gutachter] Kersten, and Nivedita [Gutachter] Mani. "Elementary School L2 English Teachers’ Language Performance and Children’s Second Language Acquisition - Appendices / Cirsten Carlson ; Gutachter: Kristin Kersten, Nivedita Mani." Hildesheim : Universitätsverlag Hildesheim, 2020. http://d-nb.info/1207074470/34.
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Paschall, Stephen C. (Stephen Charles) 1978. "Mars entry navigation performance analysis using Monte Carlo techniques." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/16661.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2004.Includes bibliographical references (p. 169-170).
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
An atmospheric entry and descent full-state navigation filter is developed and presented. Using this filter a navigation performance analysis is performed to examine the effects of various instrument packages and differing sensor scenarios for the entry and descent phase of the Mars Aerial Regional-scale Environmental Survey (ARES) mission. Deterministic simulation in conjunction with Monte Carlo techniques is used to verify navigation performance of an extended Kalman filter. This analysis specifically compares the performance of four feasible instrument packages. examines navigation performance as it varies with changes to initial sensor activation altitude, and examines error sources and covariance trends for this entry and descent scenario. The results from the analysis show that large attitude uncertainty resulting from the LN200 IMU bias causes a breakdown of the filter algorithm dlue to nonlinearities. The addition of a surface relative velocity measurement, to the altimeter measurement provides only marginal position uncertainty improvement and significant velocity and attitude uncertainty improvement. Increasing the initial altitude for sensor activation provides slight improvements in position uncertainty. but large velocity and attitude uncertainty improvements. Finally, it is shown that initial state uncertainty dominates over all other error sources in this navigation analysis. Error growth within the principal states (position, velocity, and attitude) is predominantly a product of the near-constant attitude uncertainty as it transfers from the innocuous roll attitude channel into the more consequential pitch and yaw attitude channels.
by Stephen C. Paschall, II.
S.M.
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Jonasson, Fredrik, and Björn Sparresäter. "Monte Carlo-simuleringar av germaniumdetektor för gammaspektroskopi." Thesis, Uppsala universitet, Tillämpad kärnfysik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-360049.
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Syftet med projektet är att undersöka en HPGe-detektors egenskaper med hjälp av Monte Carlo-simuleringar i simuleringskoden FLUKA. Resultaten från detta projekt ska sedan användas som underlag för en kartläggning där halten av den radioaktiva isotopen cesium-137 ska mätas på svampprover insamlade från hela landet. En rad simuleringar har gjorts med olika typer av strålningskällor och med variationer på detektorns geometri. Den detektor som ska användas för dessa mätningar är över 30 år gammal vilket kan medföra att vissa egenskaper kan ha förändrats med tiden. Resultaten från simuleringarna visar dock att eventuella förändringar är försumbara. En annan del av detektorns geometri, ett kylningshål i botten av germaniumkristallen, specificeras inte tydligt i produktspecifikationerna från tillverkaren. Även här visar dock simuleringarna att hålets storlek inte har någon större betydelse. Däremot visar simuleringarna, som förväntat, att detektorns effektivitet varierar beroende på strålningens energi och avståndet från strålningskällan.
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Lee, Li-Chyn 1965. "Comparison of Monte Carlo and analytic critical area calculation." Thesis, The University of Arizona, 1992. http://hdl.handle.net/10150/278175.
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Since the profitability of VLSI industries is related to yield, the IC manufacturer finds it highly desirable to be able to predict the yield by computer-aided methods. A key part in the procedure to obtain yield by computer simulation is to find the critical area of a layout. This thesis is primarily devoted to the calculations of critical area. There are two techniques to find the critical area. In the first technique, an analytic method was used to analyze the circuit geometry in order to find the critical area. In the second technique a Monte Carlo Method is used. A program using this Monte Carlo yield simulation (the main method used in this thesis) has been developed for determining critical area of the metal layer of a 4K random access memory. The analytic method is used in a supporting way. The thesis also proposes an easy method to process the vast amount of layout database. This method reduces the time consumed by Monte Carlo simulation.
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Saritas, Kayahan. "Quantum Monte Carlo for accurate energies and materials design." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/111252.
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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2017.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 107-119).
Quantum Monte Carlo (QMC) is an electronic structure calculation method that is capable of calculating incredibly accurate solutions of Schrödinger equation of quantum mechanics for real systems. However, QMC is computationally very expensive compared to density functional theory (DFT) method, such that its application has been limited. In addition, QMC is a stochastic (Monte Carlo) method, meaning that the way calculations are initialized, where a lot of user effort is invested, is crucial for getting accurate results. Computational expense can be justified if the data would be used repeatedly, however the lack of automatization is a severe problem, if QMC would be used in materials discovery. In Chapter 4, we show our automated calculation strategy for formation energy of periodic materials using QMC. We show that our method performs almost by an order of a magnitude more accurate, compared to high throughput DFT strategies having empirical corrections. Nevertheless, it would be beneficial to understand when DFT methods fail such that QMC is used only when the computational expense is justified. A single DFT functional rarely performs uniformly accurate accross different materials and properties due to nonsystematic errors. In Chapter 5, we investigate one specific example: dihydroazulene ring opening photoisomerization, where different substitutions on the ring opening moiety introduce isomerization enthalpy errors up to 0.8 eV. We show that GGA exchange is the main reason for failure in B3LYP, PBE and TPSSH functionals. However, performing a test, similar to the Chapter 5, on each chemical reaction can be an intimidating task where the benchmark set must be carefully devised by an expert in the field. In the absence of experiments, the DFT functional choice is still often done in heuristic way. In Chapter 6, we demonstrate how we can systematically analyze benchmark sets using machine learning to provide highly accurate reaction energies and provide DFT functional selection for different classes of materials when high accuracy calculations or experiments are not available. Our approach provides probabilities of getting accurate results for a reaction that is investigated using each DFT functional.
by Kayahan Saritas.
Ph. D.
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Vafadari, Cyrus. "Monte Carlo methods for parallel processing of diffusion equations." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/82451.
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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2013."June 2013." Cataloged from PDF version of thesis.
Includes bibliographical references (page 14).
A Monte Carlo algorithm for solving simple linear systems using a random walk is demonstrated and analyzed. The described algorithm solves for each element in the solution vector independently. Furthermore, it is demonstrated that this algorithm is easily parallelized. To reduce error, each processor can compute data for an independent element of the solution, or part of the data for a given element for the solution, allowing for larger samples to decrease stochastic error. In addition to parallelization, it is also shown that a probabilistic chain termination can decrease the runtime of the algorithm while maintaining accuracy. Thirdly, a tighter lower bound for the required number of chains given a desired error is determined.
by Cyrus Vafadari.
S.B.
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Harper, Sterling (Sterling M. ). "Calculating reaction rate derivatives in Monte Carlo neutron transport/." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/106690.
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Thesis: S.M. and S.B., Massachusetts Institute of Technology, Department of Nuclear Science and Engineering, 2016.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 63-64).
An operating nuclear power reactor is a complex system that is sensitive to many material parameters including densities, temperatures, and compositions. There is great interest in solving the neutron transport with Monte Carlo methods due to their extremely high fidelity, but Monte Carlo methods are too slow to run in an iterative brute-force search of the reactor parameter space. This thesis discusses the derivation, implementation, and applications of differential tallying -- a method which can be used to mitigate the computational cost of mapping out a reactor parameter space with Monte Carlo. With differential tallies, each calculation provides derivatives of tallied quantities like reactivity and fission reaction rates with respect to material density, temperature, etc. These derivatives directly provide reactivity coefficients and they can also be used to extrapolate and predict small changes in reactor parameters. Notably, a novel method is presented which uses the windowed multipole cross section representation to compute temperature derivatives due to the resolved resonance Doppler broadening effect. To demonstrate the utility of differential tallies, this thesis presents example computations of moderator density and fuel Doppler feedback coefficients in pressurized water reactor pincells. With differential tallies, the moderator and fuel Doppler coefficients can be computed 40% and 50x faster, respectively, than by brute-force methods. A calculation of pin-by-pin Doppler coefficients in an assembly is also presented in order to demonstrate that differential tallies are even more efficient for assembly calculations.
by Sterling Harper.
S.M. and S.B.
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Stefancik, John. "Demand forecasting using Monte Carlo Multi-Attribute Utility Theory." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/104825.
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Thesis: S.M. in Technology and Policy, Massachusetts Institute of Technology, School of Engineering, Institute for Data, Systems, and Society, Technology and Policy Program, 2016.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 173-176).
Volatile commodity prices over the past decade, environmentally-focused policy initiatives and new technology developments have forced manufacturers to consider the idea of substituting towards alternative materials in order meet both consumer and societal needs. The threat of substitution has created the need for manufacturing firms and other members of the supply chain to have the ability to understand the implications of substitution on future product market shares and overall raw material demand. This thesis demonstrates how Multi-Attribute Utility Theory (MAUT) can be extended to the group level to forecast future market shares by applying a distribution to the attribute weights and using a Monte Carlo simulation to capture the choices made by a heterogeneous set of decision makers. Unlike established demand forecasting techniques, such as discrete choice models, this methodology requires only a few data points from a handful of expert interviews and allows for systematic changes of preferences over time. Furthermore, the Monte Carlo MAUT methodology utilizes both revealed preference and stated preference data by integrating the two data types through a response surface methodology. Two case studies on underground distribution and overhead distribution power cables are explored in order to illustrate how the Monte Carlo MAUT methodology can be successfully applied in cases where there are diverse product types, limited numbers of decisions makers and historical market share data is sparse. Each case study illustrates how Monte Carlo MAUT can, on a regional basis, provide key insights into the impacts of changing commodity prices, changing product attribute levels, varying new technology learning rates and changing consumer preferences over time. Furthermore, an example of how Monte Carlo MAUT can be utilized to help policymakers evaluate the advantages, disadvantages and overall impact of different policy schemes within an environmental context is provided. Private firms and public governments alike can utilize Monte Carlo MAUT to improve their understanding of how market shares are likely to change over time, and more importantly, the key decisions needed on each party's behalf in order to maximize societal well-being.
by John Stefancik.
S.M. in Technology and Policy
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Leyva-Perez, Irina. "Alchemy and Symbolism in the Work of Carlos Estevez." FIU Digital Commons, 2012. http://digitalcommons.fiu.edu/etd/740.
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The purpose of this thesis was to explore how alchemy has influenced Carlos Estevez’s work through a study of the symbolic repertoire and the philosophical concepts associated with it in his art, particularly how these are expressed in his artworks and how alchemy has evolved thematically in his oeuvre. The study of alchemy influenced this artist so deeply that even pieces that were not primarily inspired by this philosophical system show traces of it, essentially by representing the concept of transformation, crucial to understanding the alchemical process. This thesis is based on Carl Gustav Jung’s idea of metaphysical transformation as one of the main aspects of alchemy, and on his theory of active imagination as a tool to represent thoughts through artworks. Alchemy transformed Estevez’s art, and by extension the way he approaches life, making him conscious of the importance of transmutation and alchemical concepts.
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Beck, John. "William Carlos Williams, John Dewey, and American cultural politics." Thesis, University of Cambridge, 1995. https://www.repository.cam.ac.uk/handle/1810/271998.
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[Verfasser], Thanh Tung Vo, David J. [Akademischer Betreuer] Green, and Jon [Akademischer Betreuer] Carlson. "The computation of transfer maps, evens norm maps and Steenrod operations / Thanh Tung Vo. Gutachter: David J. Green ; Jon F. Carlson." Jena : Thüringer Universitäts- und Landesbibliothek Jena, 2011. http://d-nb.info/1016683405/34.
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Chatterjee, Subhasri. "Monte Carlo investigation of light-tissue interaction in photoplethysmography." Thesis, City, University of London, 2018. http://openaccess.city.ac.uk/21266/.
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Photoplethysmography (PPG) is a non-invasive photometric technique which measures changes in the volume of blood in the biological tissue. PPG is well-known for its application in pulse oximetry used for the continuous monitoring of arterial blood oxygen saturation (SpO2). Over the past decade, there has been a plethora of research in the field of PPG, with potential applications beyond pulse oximetry and heart rate monitoring. Such applications explore the utilisation of PPG for the assessment of various bio-markers relating to vascular mechanics, haemodynamics and many others. With the growing research interest in the field of PPG, a comprehensive understanding of the light-tissue interaction-based working principle underlying the technique is essential. This thesis is focussed on the investigation of the fundamental light-tissue interactions in PPG using the Monte Carlo method. Tissue models have been developed in this thesis which were characterised by the optical properties (e.g., wavelength- dependent coefficients of scattering and absorption etc.), the anatomical features (e.g., stratification and dimension of tissue layers and sublayers etc.), and the physiological parameters (water and blood content in tissue layers etc.). The Monte Carlo strategy was verified, and was initially implemented to model the light propagation through a monolayer perfused dermal tissue volume in a reflective mode PPG at the red and near-infrared wavelengths, usually used in pulse oximetry. Results illustrated the distribution of the scattering-absorption interaction events, and quantified the optical pathlength, penetration depth and detected reflectance with the variable sensor geometry (i.e., source-detector separation) and physiological states (i.e., the volume of blood and oxygen saturation) of the tissue. The monolayer model was also employed to produce the plot resembling the 'calibration curve' used in pulse oximetry. With the knowledge gained from the monolayer-model study, a similar investigation was performed on a heterogeneous tissue structure of a human finger which was executed in both reflective and transmissive geometrical settings. The calibration curves produced from the detected reflectance and transmittance exhibited a high correlation. The absorbances of red and near-infrared light by individual layers of the finger were quantified at systole and diastole. To the relative absorbance, the contributions of dermis and bone were the maximum and the minimum, respectively. The dependence of the optical pathlength on the source-detector separation and the operating wavelength was quantified by the Differential Pathlength Factor (DPF), which was assessed for the reflective mode PPG by simulating light propagation through a human forearm tissue volume. The DPF values were used in experimentally obtained PPG signal in order to determine the time-change in the concentration of oxyhaemoglobin and deoxyhaemoglobin. Cross-talk and absolute errors were calculated between the simulated and approximated DPFs. The results presented in the thesis contribute greatly to the understanding on PPG light-tissue interaction. Such knowledge could also greatly contribute to the development of the new generation PPG sensors for various applications.