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Aravind, Swapna. "Molecular and Biochemical Analysis of the Histidine Kinase CusS and its Role in Metal Resistance in Escherichia coli." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/232493.
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Transition metals such as copper, zinc and nickel are required in many enzymatic processes that require redox changes. When transition metal concentration exceeds a certain threshold, their redox and metal binding properties make these elements extremely toxic. Bacteria regulate the cellular concentration of these important, yet toxic, elements using elaborate homeostatic systems. One such mechanism is the chemiosmotic extrusion of copper by the Cus system in the Gram-negative bacterium Escherichia coli. This work studies the regulation of the Cus system in response to copper and silver ions. Copper is an essential cofactor required in many enzymatic processes. But its redox properties can lead to toxicity. Silver is chemically similar to copper, but is not bioactive and its presence in cells can lead to extreme cytotoxicity. Transcription from cusCFBA genes is controlled by the CusR/CusS TCS in response to elevated levels of copper or silver in the periplasmic space of E. coli. Extracellular signals are transduced into the cell through phosphotransfer reactions between the prototypical histidine kinase CusS and the response regulator CusR. Copper sensing by the periplasmic domain of CusS is proposed to initiate signal transduction in the Cus system. Despite the frequency with which bacteria employ histidine kinases to sense their environment, signal recognition and incorporation by the protein is not well understood. The goal of this research is to investigate the role of CusS in regulating metal homeostasis in E. coli and characterize the periplasmic domain of the protein to determine its metal binding properties. The experiments described in this work reveal that the CusS is essential for copper and silver resistance and regulates expression from the cusCFBA promoter region. Signal recognition occurs by direct metal binding by the periplasmic domain of CusS. Metal binding causes a change in the secondary structure of the domain and its tendency to dimerize is enhanced under these conditions. The possibility of signal attenuation by interaction with the metallochaperone CusF is also discussed. These data help construct a model for signal transduction in the Cus system and help characterize, for the first time, a metal-responsive sensor histidine kinase in E. coli.
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Böhm, Walter, and Peter Hackl. "CUSUM Chart for Correlated Control Variables." Department of Statistics and Mathematics, WU Vienna University of Economics and Business, 1991. http://epub.wu.ac.at/76/1/document.pdf.
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The cumulative sum (CUSUM) technique is well-established in theory and practice of process control. A comprehensive exposition of the method is given, e.g., by Wetherill and Brown (1991). A question that is seldom treated in the literature is that on the effect of serial correlation of the control variable. Johnson and Bagshaw (1974) investigate the effect of correlation on the run length distribution when the control variable follows a first order autoregressive or moving average process. They also give an approximate expression for the average run length of the CUSUM- technique for correlated control variables. In this paper we derive an exact expression for the average run length of a discretized CUSUM-technique, i.e., a technique that uses a scoring system for the observations of the control variable. The scoring system is that suggested by Munford (1980). Our results are derived for a control variable that is assumed to follow a first order autoregressive process and with normally distributed disturbances. After deriving in Section 2 the expression for the average run length we discuss its dependence on the process parameter and give a numerical illustration. In Section 3 we discuss corrections for the CUSUM-technique in order to keep the nominal risk for an out-of-control decision and compare our results with those given by Johnson and Bagshaw (1974). (author's abstract)Series: Forschungsberichte / Institut für Statistik
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Khare, Chandrashekhar B. Hida Takeyuki. "Congruences between cusp forms /." Diss., Pasadena, Calif. : California Institute of Technology, 1995. http://resolver.caltech.edu/CaltechETD:etd-10122007-073759.
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Alves, Custodio da Cunha. "Gráficos de Controle CUSUM." Florianópolis, SC, 2003. http://repositorio.ufsc.br/xmlui/handle/123456789/84565.
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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia de Produção.Made available in DSpace on 2012-10-20T10:29:37Z (GMT). No. of bitstreams: 1 192006.pdf: 1591812 bytes, checksum: 66300110b66ce2392ae056bfc7fade76 (MD5)
O monitoramento efetivo das características da qualidade de um processo de produção depende freqüentemente de ferramentas estatísticas para a detecção, identificação e análise das causas significantes responsáveis por variações que afetam o comportamento do processo de maneira imprevisível. Os gráficos de controle CUSUM, baseados em somas acumuladas, são ferramentas estatísticas utilizadas com sucesso no monitoramento do desempenho de diferentes processos industriais. Estes gráficos podem complementar ou substituir com vantagens os tradicionais gráficos de Shewhart, podendo permitir, em função do caso em análise, a obtenção de uma solução mais precisa, a um custo e prazos menores que os requeridos pelas metodologias tradicionais. Neste trabalho, um comparativo do desempenho dos gráficos de Shewhart e CUSUM é realizado a partir de um estudo de caso realizado em uma indústria de artefatos de borracha, no qual se utilizam dados reais de dois processos industriais: um processo com observações amostrais e o outro com observações individuais. O objetivo deste estudo é investigar a sensibilidade existente entre estes gráficos quanto a utilização de cada um deles para detectar pequenas e permanentes mudanças na média do processo na ordem de até 1,5 desvio padrão. Os resultados obtidos deste estudo de caso indicaram ser preferível o uso de gráficos CUSUM ao uso de gráficos Shewhart para monitorar as pequenas variações na média da característica da qualidade de ambos os processos estudados.
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Ding, Keyue. "Inference problems after CUSUM tests." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0030/NQ46830.pdf.
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Pruett, Bill H. "Conciliarism in Nicholas of Cusa." Theological Research Exchange Network (TREN), 1986. http://www.tren.com.
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Hongcheng, Li. "Multivariate Extensions of CUSUM Procedure." Kent State University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=kent1185558637.
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van, Soest Francien. "The development of a methodology for the identification of potential wet grassland restoration sites in south west England." Thesis, University of Plymouth, 2002. http://hdl.handle.net/10026.1/1748.
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Large scale drainage and pasture improvement in the past and present-day neglect of the floristically diverse wet grasslands in south west England have caused a significant decrease, approximately 92% since 1900. in the total area of this ecologically valuable semi-natural plant community. The plant community, which is locally called Culm grassland, consists of acid purple moor grassland, soft rush meadows and wet heaths. Conservation and restoration of these grasslands requires careful planning and efficient use of resources. This study was aimed at developing strategies for regional planning authorities and nature conservation agencies and developed a management tool for the selection of potential Culm grassland restoration locations and for the prediction of species composition based on the environmental characteristics of a site. Three separate sections of the research could be distinguished. The first section studied the relationships between the wet grassland location and the landscape topography, catchment hydrology and soil physical characteristics, with the use of Geographical Information Systems. Landscape topography was expressed as the ln(a/tan^) topographic index, in which 'a' is the upslope area draining through the point for which the index is calculated and 'fi' is the local slope angle. Culm grassland sites were generally found on positions with a topographic index larger than eight. A quantification of soil saturation periods was carried out by modelling the surface water dynamics with the hydrological model TOPMODEL, which was based mainly on the topographic index. Soil hydrological characteristics were described by applying the Hydrology Of Soil Types (HOST) classification to the soil map of the area. Results indicated that Culm grassland was mainly associated with poorly drained soils and topographic hollows on level or gently sloping grounds. The second section investigated the species composition In relation to environmental parameters and grazing regime. A field study involving collection of vegetation, soil and site data was carried out on existing Culm grassland sites. Multivariate statistical techniques were applied to relate vegetation gradients to the environmental parameters. Results showed that grazing pressure, soil pH and soil water were the factors most responsible for species composition within the Culm grassland communities. The third section integrated the results into a decision support system, which indicated where potentially suitable restoration sites were located and the species composition that could develop based given the environmental parameters. The procedure was tested by application of the decision rules to an independent area and comparison of the potentially suitable sites to historical data, field observations and land use information. From this study, given readily obtainable soil and topographic data a, good first selection of areas for further Culm grassland development could be made. However, relationships between vegetation and environmental parameters will need more detailed field investigation to obtain completely reliable results.
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Meier-Oeser, Stephan. "Die Präsenz des Vergessenen : zur Rezeption der Philosophie des Nicolaus Cusanus vom 15. bis zum 18. Jahrhundert /." Münster : Aschendorff, 1989. http://catalogue.bnf.fr/ark:/12148/cb35507132h.
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Albarracin, Orlando Yesid Esparza. "Monitoramento de séries de contagem por meio de gráficos de controle." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/45/45133/tde-20052014-202803/.
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Na área da saúde, várias abordagens nos últimos anos têm sido propostas baseadas nos gráficos de controle CUSUM para a detecção de epidemias infecciosas em que a caraterística a ser monitorada é uma série temporal de dados de contagem, como o número de internações. Neste trabalho foram implementados os modelos lineares generalizados (MLG) no monitoramento, por meio dos gráficos CUSUM e Shewhart, da série do número diário de internações por causas respiratórias para pessoas com 65 anos ou mais residentes no município de São Paulo. Por meio de simulações, avaliaram-se a eficiência de cinco estatísticas diferentes para detectar mudanças na média em séries de contagem. Uma das abordagens consistiu na implementação de três transformações normalizadoras simples que dependem unicamente dos parâmetros das distribuições Poisson e binomial negativa: a transformação Rossi para dados com distribuição Poisson, a transformação Jorgensen para dados com distribuição binomial negativa e os sesíduos de Anscombe para modelos lineares generalizados. As duas últimas estatísticas já foram propostas como gráficos CUSUM: o Método Rogerson e Yamada (2004) é apresentado para dados com distribuição Poisson e neste trabalho foi proposto um novo parâmetro kt para dados binomial negativa; já o método proposto por Hohle (2007) é baseado na função de verossimilhança da distribuição binomial negativa. Utilizando limites de controle para obter um valor ARL0 = 500 sob normalidade, monitorou-se via simulação a série de interesse, implementando as transformações normalizadoras. Entretanto, utilizando-se esses limiares observa-se um maior número de alarmes falsos para as três estatísticas. Modificando o parâmetro k do gráfico CUSUM permitindo que variasse ao longo do tempo a série foi monitorada e foram obtidos valores ARL0 próximos a 500. Os gráficos CUSUM baseados no método Rogerson e Yamada e na estatística da razão de verossimilhanças para dados com distribuição binomial negativa mostraram, via simulação, bons resultados para detectar mudanças na média. As suposições de normalidade e independência das estatísticas normalizadoras, em geral omitidas em trabalhos publicados na literatura, foram avaliadas e comprova-se que as transformações não normalizam os dados, porém são independentes e estacionárias. Analisando os dados reais, as estatísticas apresentaram autocorrelação significativa no lag 7. Devido à persistência desta autocorrelação, foi proposta uma abordagem baseada no ajuste do modelo GARMA.In public health several approaches have been proposed for the detection of outbreaks of infectious diseases where the characteristic being monitored is a time series of count data as the number of hospitalizations, where the population and the expected rate of admissions change over time. In this work we fitted generalized linear models (GLM) and implemented Shewhart and CUSUM control charts for monitoring the daily number of hospital admissions due to respiratory diseases for people aged 65 and older in the city of São Paulo. Through simulations, we evaluated the efficiency of implementing five different statistical for detecting changes in time series of count. One approach consisted of applying three transformations that only depend on the parameters of the negative binomial and Poisson distributions: The transformations of Rossi for data with Poisson distribution, the transformation proposed by Jorgensen for data with negative binomial distribution and residuals proposed by Anscombe for generalized linear models. The other statistics have been proposed as CUSUM charts: the method of Rogerson e Yamada (2004) was presented for data with Poisson distribution, in this work we proposed a new parameter kt for negative binomial distribution, the proposed method for Hohle (2007) uses the likelihood ratio statistic. Implementing limit control assuming normality for a value of ARL0 = 500 be monitored via simulation the serie of interest implementing the normalizing statistics. However, using these limits was observed a greater number of alarms for the three transformations. Modifying the parameter k of the CUSUM chart to this change over time the series was monitored and were obtained values of ARL0 close to 500. The CUSUM control charts for the methods of Rogerson and Yamada and Holhe for data with negative binomial distribution showed, by simulation, good results for detecting changes in the mean. For negative binomial distribution generalizing the method of Rogerson e Yamada (2004) and implemented the CUSUM charts using the likelihood ratio statistic. Both methods provided good results via simulation to detect small changes in average. The evaluation of assumptions of normality for the statistics proposed by Rossi, Jorgensen and Anscombe generally is omitted in published studies. In this work, we evaluated this assumptions indicating that the statistics are not normal using the real dataset but are independent and stationary. By analyzing real data, due to the persistence of correlation for the normalized statistics, an approach based on setting GARMA model was proposed. This method showed good results once the residuals of the fitted model were normal and independent. Due to the persistence of correlation for the normalized statistics, an approach based on setting GARMA model was proposed. This method showed good results once the residuals of the fitted model were normal and independent.
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Eger, Karl-Heinz, and Evgeni Borisovich Tsoy. "CUSUM tests based on grouped observations." Universitätsbibliothek Chemnitz, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200901820.
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This paper deals with CUSUM tests based on
grouped or classified observations. The computation of average
run length is reduced to that of solving of a system of simultaneous
linear equations. Moreover a corresponding approximation
based on the Wald approximations for characteristics of sequential
likelihood ratio tests is presented.
The effect of grouping is investigated with a CUSUM test
for the mean of a normal distribution based on F-optimal
grouping schemes. The considered example demonstrates that
hight efficient CUSUM tests can be obtained for F-optimal
grouping schemes already with a small number of groups.
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Lundell, David. "Detektion av vätgasläckor med CUSUM-algoritmen." Thesis, Linköping University, Department of Electrical Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-18634.
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Detektion av gasläckor används i en mängd olika applikationer som till exempel kvalitetskontroll av kylskåp, lokalisering av skador på kablar och lokalisering av bränsleläckor i bränsletankar.
Denna rapport undersöker förbättring av detektionsalgoritmen i en existerande vätgasdetektor.
CUSUM algoritmen är en enkel men kraftfull metod för att snabbt detektera små ändringar i nivån av en signal. Denna metod är anpassad till det dynamiska beteendet i sensorn som används för att spåra vätgasläckorna och även utvärderad på omfattande mätningar utförda på läckor med kända storlekar. Resultaten visar att användning av den föreslagna detektionsalgoritmen innebär en betydande ökning av detektorns prestanda. Särskilt bra blir resultatet på små läckor.
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Harlim, John. "Codimension three Hopf and cusp bifurcation." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ58343.pdf.
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Wei, Chengeng. "Cusp singularity in nonlinear dynamical systems /." Philadelphia, Pa. : Drexel University, 2004. http://dspace.library.drexel.edu/handle/1860/287.
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Spindler, Susan L. "Evaluation of some multivariate CUSUM schemes /." Online version of thesis, 1987. http://hdl.handle.net/1850/10330.
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Rochon, Frédéric 1978. "Bott periodicity for fibred cusp operators." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/30357.
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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 2005.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Includes bibliographical references (p. 81-82).
In the framework of fibred cusp operators on a manifold X associated to a boundary fibration ... , the homotopy groups of the space ... of invertible smoothing perturbations of the identity are computed in terms of the K-theory of T*Y . It is shown that there is a periodicity, namely the odd and the even homotopy groups are isomorphic among themselves. To obtain this result, one of the important steps is the description of the index of a Fredholm smoothing perturbation of the identity in terms of an associated K-class in K ...
by Frédéric Rochon.
Ph.D.
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Yao, Shangchen. "Multi-dimensional CUSUM and SPRT Procedures." Kent State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=kent1555001577068819.
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Jasinski, J. M. "Cassini observations of Saturn's magnetospheric cusp." Thesis, University College London (University of London), 2015. http://discovery.ucl.ac.uk/1470751/.
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The magnetospheric cusp is a funnel-shaped region where shocked solar wind plasma is able to enter the high latitude magnetosphere via the process of magnetic reconnection. The first in-situ analysis of the cusp region at Saturn is presented using data from the Cassini spacecraft, primarily from particle instruments and magnetic field observations. The analysis is presented in three sections. Firstly, two high-latitude spacecraft crossings are confirmed to be cusp observations by: (i) comparing the observed plasma with that of the magnetosheath and the adjacent magnetosphere, (ii) investigating the direction of the observed ions and (iii) analysing the composition of the plasma. The ion observations are shown to be a result of `bursty' reconnection occurring at the dayside magnetopause. The field-aligned distances to the reconnection site are calculated from the observed energy-pitch angle dispersions. Secondly, all the observations of the cusp are presented for the high latitude spacecraft orbits between 2007 and 2013. A comparison of the observations is made as well as classification into groups due to varying characteristics. The locations of the reconnection site are calculated and compared to the literature. The events are also compared to solar wind propagation models to investigate any correlations. Finally, the magnetic field observations of the cusps are analysed, focusing on the diamagnetic depressions. This characteristic is not observed in all of the cusps, and the possible explanations for this are discussed. The data are subtracted from a magnetic field model, and the calculated magnetic pressure deficits are compared to the particle pressures. A high plasma pressure layer in the magnetosphere adjacent to the cusp is discovered to also depress the magnetic field. A summary of the consequences of this work is discussed specifically regarding the ongoing debate of the role of reconnection at Saturn and its influence on magnetospheric dynamics.
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Fukuda, Tsuyoshi Valentim. "Controle estatístico de processo aplicado à produção de dispositivos eletrônicos." Universidade Federal do Amazonas, 2009. http://tede.ufam.edu.br/handle/tede/3546.
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Previous issue date: 2009-12-14Manufacturing electronic mobile communication products requires high quality control, achieved through measurements and tunings of each unit produced. The goal of this publication is the evaluation of statistical process control (SPC) to monitor the quality of products and the process capability index Cpk. In other words, this study compares the sensitivity of control charts to detect variations in process mean and standard deviation. In this sense, Shewhart control charts and cumulative sum (CUSUM) control charts were comparatively analyzed to select the best SPC in order to guarantee more accurate measurements and devices tuned with lower deviations. Shewhart, in this case, uses the mean and the standard deviation of samples measured during a defined period of time. CUSUM control charts, based on cumulative sums, are statistical tools successfully used to evaluate processes in different industries. The Shewhart control chart was optimized to monitor the capability index Cpk. According to results obtained under the conditions of this experience, CUSUM control chart has higher sensibility when the process has small shifts. It was not observed efficacy of optimized Shewhart control chart to monitor Cpk.
A manufatura de produtos eletrônicos de comunicação móvel demanda um controle de qualidade apurado que é atingido através de medições e de sintonias de cada unidade produzida. O objetivo deste trabalho é avaliar o uso de controle estatístico de processo (CEP) para monitorar a qualidade dos produtos e o índice Cpk de capacidade do processo. Em outras palavras, este estudo compara a sensibilidade do gráfico de controle para detectar variações na média e no desvio padrão do processo. Nesse sentido, foi usada a medição de um parâmetro crítico do dispositivo produzido, a potência irradiada. Neste estudo, gráficos de controle de Shewhart e de soma cumulativa (CUSUM) foram analisados comparativamente para encontrar o melhor CEP para garantir medições mais exatas e dispositivos sintonizados com menores desvios. Shewhart, neste caso, usa a média e o desvio padrão de amostras observadas num período de tempo definido. Os gráficos de controle CUSUM, baseado em somas cumulativas, são ferramentas estatísticas usadas com sucesso para avaliar processos de diferentes indústrias. O gráfico de Shewhart foi otimizado para monitorar o índice de capacidade Cpk. De acordo com os resultados obtidos nas condições do experimento, o gráfico de controle CUSUM mostrou maior sensibilidade para pequenos desvios no processo. Não foi obsevada a eficácia do gráfico de Shewhart otimizado para monitorar o índice de capacidade Cpk.
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Platzer, Katrin. "Symbolica venatio und scientia aenigmatica : eine Strukturanalyse der Symbolsprache bei Nikolaus von Kues /." Frankfurt am Main : P. Lang, 2001. http://catalogue.bnf.fr/ark:/12148/cb40150352r.
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Thiemel, Markus. "Coincidentia : Begriff, Ideengeschichte und Funktion bei Nikolaus von Kues /." Aachen : Shaker Verl, 2000. http://catalogue.bnf.fr/ark:/12148/cb401503622.
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Zeileis, Achim. "p values and alternative boundaries for CUSUM tests." SFB Adaptive Information Systems and Modelling in Economics and Management Science, WU Vienna University of Economics and Business, 2000. http://epub.wu.ac.at/1778/1/document.pdf.
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Firstly rather accurate approximations to the p value functions of the common Standard CUSUM test and the OLS-based CUSUM test for structural change are derived. Secondly alternative boundaries for both tests are suggested and their properties are examined by simulation of expected p values. It turns out that the power of the OLS-based CUSUM test for early and late structural changes can be improved, whereas this weakness of the Standard CUSUM test cannot be repaired by the new boundaries.Series: Working Papers SFB "Adaptive Information Systems and Modelling in Economics and Management Science"
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Martín, Avià Jordi. "Competencia en cirugía vitreorretiniana: evaluación de la curva de aprendizaje de la vitrectomía mediante el análisis CUSUM." Doctoral thesis, Universitat Rovira i Virgili, 2019. http://hdl.handle.net/10803/667652.
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Introducció: No existeix formació tutoritzada en retina a Espanya. No hi ha cap mètode d'avaluació de la corba d'aprenentatge en cirurgia de retina, sent el més habitual l'anàlisi de casos successius de complicacions quirúrgiques. És necessari el desenvolupament d'un sistema d'autoavaluació de la corba d'aprenentatge en vitrectomia per assegurar el seu correcte progrés amb seguretat fins la seva aquisició.
Objectiu: Avaluar la utilitat de les gràfiques de suma acumulada (CUSUM) per analitzar l'evolució de la corba d'aprenentatge en vitrectomia.
Mètodes: Es van revisar els primers pacients intervinguts de vitrectomia per un cirurgià principiant. Es van recollir les següents dades: el diagnòstic principal, el temps d'aprenentatge, la tècnica quirúrgica i les complicacions intraoperatòries i postoperatòries. Es va realitzar una anàlisi de casos successius de l'evolució de les complicacions quirúrgiques i es van crear gràfiques CUSUM per a 5 variables: retinotomía, hipertensió i hipotonia postoperatòries, cataracta secundària i redesprendimiento de retina.
Resultats: Es van incloure 237 vitrectomies. L'anàlisi de casos successius va determinar un canvi de tècnica a favor de la vitrectomia transconjuntival a partir de les 80 vitrectomies, amb un increment de les complicacions en el següent trimestre. Les gràfiques CUSUM mostren un bon rendiment, adquirint la competència en moments diferents per a cada variable; així com períodes de baix rendiment, coincident amb l'increment en les complicacions. La competència completa es va aconseguir en el cas 236.
Conclusions: L'anàlisi de la corba d'aprenentatge mostra que el temps d'aprenentatge és més gran que la percepció del cirurgià. L'anàlisi de casos successius es confirma subjectiu i tardà, mentre que l'anàlisi CUSUM es proposa com un mètode objectiu, prospectiu i precís, amb capacitat per preveure un pobre rendiment.Introducción: No existe ningún método de evaluación de la curva de aprendizaje en cirugía de retina, siendo el más habitual el análisis de casos sucesivos de complicaciones quirúrgicas. No existe formación tutorizada en retina en España, por lo que es necesario el desarrollo de un sistema de autoevaluación de la curva de aprendizaje en vitrectomía para asegurar su correcto progreso con seguridad hasta su adquisición. Objetivo: Evaluar la utilidad de las gráficas de suma acumulada (CUSUM) para analizar la evolución de la curva de aprendizaje en vitrectomía. Métodos: Se revisaron los primeros pacientes intervenidos de vitrectomía por un cirujano principiante. Se recogieron los siguientes datos: el diagnóstico principal, el tiempo de aprendizaje, la técnica quirúrgica y las complicaciones intraoperatorias y postoperatorias. Se realizó un análisis de casos sucesivos de la evolución de las complicaciones quirúrgicas y se crearon gráficas CUSUM para 5 variables: retinotomía, hipertensión e hipotonía postoperatorias, catarata secundaria y redesprendimiento de retina. Resultados: Se incluyeron 237 vitrectomías. El análisis de casos sucesivos determinó un cambio de técnica a favor de la vitrectomía transconjuntival a partir de las 80 vitrectomías, con un incremento de las complicaciones en el siguiente trimestre. Las gráficas CUSUM muestran un buen rendimiento, adquiriendo la competencia en momentos distintos para cada variable; así como períodos de bajo rendimiento, coincidente con el incremento en las complicaciones. La competencia completa se consiguió en el caso 236. Conclusiones: El análisis de la curva de aprendizaje muestra que el tiempo de aprendizaje es mayor que la percepción del cirujano. El análisis de casos sucesivos se confirma subjetivo y tardío, mientras que el análisis CUSUM se propone como un método objetivo, prospectivo y preciso, con capacidad para prever un pobre rendimiento.
Introduction: There is no method for learning curve assessment in vitrectomy, the most common being the sequential case analysis of surgical complications. There are no tutorized retina fellowships in Spain, so it is necessary to develop a self-assessment system of the vitrectomy learning curve, to ensure safe progress until it is achieved. Objective: To assess cumulative sum analysis (CUSUM) capability to analyze learning curve in vitrectomy. Methods: A single ophthalmologist trainee’s first vitrectomy cases were evaluated. Following data was collected: diagnosis, learning time, surgical technique, intraoperative and postoperative complications. Sequential case analysis was carried out to assess the evolution of surgical complications over time and CUSUM charts were created for 5 variables: retinotomy, ocular hypertension, hypotony, secondary cataract and retinal redetachment. Results: 237 vitrectomies were included. Sequential case analysis detected a change in surgical technique towards transconjunctival vitrectomy around the 80th case, with surgical complications increasing in the following trimester. CUSUM charts show good performances, achieving competence at a different learning time for each variable, as well as periods of an unsatisfactory performance, coincident with an increase in surgical complications. Full vitrectomy competence was achieved following 236 procedures. Conclusions: Learning curve analysis indicates that time to achieve competence takes longer than the surgical trainee thinks. Sequential case analysis is proved to be a subjective and late system for learning curve assessment, while CUSUM analysis is proposed as an objective, prospective and precise method, that also provides the ability to anticipate an unsatisfactory performance.
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Rafferty, Euan. "Cusp based electron beam production and experiments." Thesis, University of Strathclyde, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.443139.
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Zhao, Peng. "Quantum Variance of Maass-Hecke Cusp Forms." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1243916906.
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Ng, Ming-ho, and 吳銘豪. "The basis for space of cusp forms and Petersson trace formula." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B47176726.
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Let S2k(N) be the space of cusp forms of weight 2k and level N. Atkin-Lehner theory shows that S2k(N) can be decomposed into the oldspace and its orthogonal complement newspace. Again, from Atkin-Lehner theory, it follows that there exists a basis of newspace whose elements are simultaneous eigenforms of all the Hecke operators. Such eigenforms when normalized are called primitive forms.
In 1932, Petersson introduced a harmonic weighted sum of the Fourier coefficients of an orthogonal basis B2k(N) for S2k(N), denoted by _2k;N . Petersson connected _2k;N to Kloosterman sums and Bessel functions, which is now known as the Petersson trace formula. The Petersson trace formula shows that _2k;N is independent of the choice of orthogonal basis. It is known that the oldspace decomposes into the images of newspaces of different levels under the scaling operator Bd where d is a proper divisor of N. It is of interest to derive a Petersson-type trace formula for primitive forms.
In 2001, H. Iwaniec, W. Luo and P. Sarnak obtained an expression of Petersson-type trace formula for primitive forms in terms of _2k;N , when the level N is squarefree. Their method is to construct a special orthogonal basis for S2k(N). Using their approach, D. Rouymi has extended similar results to the case of prime power level in 2011.
In this thesis, the case of arbitrary levels is investigated. Analogously, a special orthogonal basis is constructed and a Petersson-type trace formula for primitive forms in terms of _2k;N is found. The result established in this thesis recovers the results of H. Iwaniec, W. Luo and P. Sarnak, and D. Rouymi respectively for the cases of squarefree and prime power levels.published_or_final_version
Mathematics
Master
Master of Philosophy
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Li, Zihao. "Power Study on Testing Epidemic Alternatives." FIU Digital Commons, 2013. http://digitalcommons.fiu.edu/etd/820.
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Detecting change points in epidemic models has been studied by many scholars. Yao (1993) summarized five existing test statistics in the literature. Out of those test statistics, it was observed that the likelihood ratio statistic showed its standout power. However, all of the existing test statistics are based on an assumption that population variance is known, which is an unrealistic assumption in practice. To avoid assuming known population variance, a new test statistic for detecting epidemic models is studied in this thesis. The new test statistic is a parameter-free test statistic which is more powerful compared to the existing test statistics. Different sample sizes and lengths of epidemic durations are used for the power comparison purpose. Monte Carlo simulation is used to find the critical values of the new test statistic and to perform the power comparison. Based on the Monte Carlo simulation result, it can be concluded that the sample size and the length of the duration have some effect on the power of the tests. It can also be observed that the new test statistic studied in this thesis has higher power than the existing test statistics do in all of cases.
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Potterfield, Eric. "Auspicious Generation: The Bamboo LIfe Cycle of a Chinese Cultural Center." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/49269.
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This is an architectural thesis exploring bamboo not just as a material, but asking what the temporal nature of the material could mean for design. While bamboo is often considered sustainable because of its considerable growth rate, few really embrace the nature of bamboo. To exhibit this concept this project follows the line from source to destination, and from germination to structure; not representing a fi nished object in single moment, but an idea that spans time. To do this, bamboo acts as a catalyst for a cultural center. It grows and matures and is harvested, it changes the space; and as it is used, degrades, and fi nally taken down, it changes the design. From seed to opera house and back again to the earth, the cycle breaths continuous life into the site.
The project, located near 7th and H Street, NW, in Washington, DC is a dual program - both cultural center and public garden. The "bookends" or exterior buildings on the site are a balancing force to the ephemeral nature of the bamboo. The terracotta bearing walls buffer the peaceful inside from the outside. Their roles serve as stage to the street, gatehouse to the garden, and armature for the bamboo structures to be built upon. Their solidity holds in and allows the movement of time to ebb and flow with that of the bamboo grove.Master of Architecture
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Albarracin, Orlando Yesid Esparza. "Generalized autoregressive and moving average models: control charts, multicollinearity, and a new modified model." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/45/45133/tde-21112017-184544/.
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Recently, in the health surveillance area, control charts have been proposed to decide if the morbidity or mortality of a specific disease reached an epidemic level. This thesis is composed by 3 papers. In the first two papers, CUSUM and EWMA control charts were proposed to monitor count time series with seasonal and trend effects using the Generalized Autoregressive and Moving Average models (GARMA), instead of the independent Generalized Linear Model (GLM) as it is usually used in practice. Different statistics based on transformations, for variables that follow a Negative Binomial distribution, were used in these control charts. In the second paper, two new statistics were proposed based on the ratio of log-likelihood function. Different scenarios describing disease profiles were considered to evaluate the effect of omission of serial correlation in EWMA and CUSUM control charts. The performance of CUSUM and EWMA charts when the serial correlation is neglected in the regression model was measure in terms of average run length (ARL). In summary, when the autocorrelation is neglected, fitting a pure GLM instead of a GARMA model will lead to an increase of false alarms. However, no statistics among the tested ones seem to be robust, in a sense to produce the smallest increase of false alarms in all scenarios. In general, all monitored statistics presented a smaller ARL_0 for higher values of autocorrelation. \\\\ In the last paper, the GARMA models (p, q) with p and q simultaneously different from zero were studied since that two features were observed in practice. One is the multicollinearity, which may lead to a non-convergence of the maximum likelihood, using iteratively reweighted least squares. The second is the inclusion of the same lagged observations into the autoregressive and moving average components confounding the interpretation of the parameters. In a general sense, simulation studies show that the modified model provide estimators closer to the parameters and offer confidence intervals with higher coverage percentage than obtained with the GARMA model, but some restrictions in the parametric space are imposed to guarantee the stationarity of the process. Also, a real data analysis illustrate the GARMA-M fit for daily hospilatization rates of elderly people due to respiratory diseases from October 2012 to April 2015 in São Paulo city, Brazil.Recentemente, no campo da saúde, gráficos de controle têm sido propostos para monitorar a morbidade ou a mortalidade decorrentes de doenças. Este trabalho está composto por três artigos. Nos dois primeiros artigos, gráficos de controle CUSUM e EWMA foram propostos para monitorar séries temporais de contagens com efeitos sazonais e de tendência usando os modelos Generalized autoregressive and moving average models (GARMA), em vez dos modelos lineares generalizados (GLM), como usualmente são utilizados na prática. Diferentes estatísticas baseadas em transformações, para variávies que seguem uma distribuição Binomial Negativa, foram usadas nestes gráficos de controle. No segundo artigo foram propostas duas novas estatísticas baseadas na razão da função de log-verossimilhança. Diferentes cenários que descrevem perfis de doenças foram considerados para avaliar o efeito da omissão da correlação serial nesses gráficos de controle. Este impacto foi medido em termos do Average Run Lenght (ARL). Notou-se que a negligência da correlação serial induz um aumento de falsos alarmes. Em geral, todas as estatísticas monitoradas apresentaram menores valores de ARL_0 para maiores valores de autocorrelação. No entanto, nenhuma estatística entre as consideradas mostrou ser mais robusta, no sentido de produzir o menor aumento de falsos alarmes nos cenários considerados. No último artigo, foram estudados os modelos GARMA (p, q) com p e q simultaneamente diferentes de zero, uma vez que duas características foram observadas na prática. A primeira é a presença de multicolinearidade, que induz à não-convergência do método de máxima verossimilhança usando mínimos quadrados ponderados reiterados. A segunda é a inclusão dos mesmos termos defasados nos componentes autorregressivos e de médias móveis. Um modelo modificado, GARMA-M, foi apresentado para lidar com a multicolinearidade e melhorar a interpretação dos parâmetros. Em sentido geral, estudos de simulação mostraram que o modelo modificado fornece estimativas mais próximas dos parâmetros e intervalos de confiança com uma cobertura percentual maior do que a obtida nos modelos GARMA. No entanto, algumas restrições no espaço paramétrico são impostas para garantir a estacionariedade do processo. Por último, uma análise de dados reais ilustra o ajuste do modelo GARMA-M para o número de internações diárias de idosos devido a doenças respiratórias de outubro de 2012 a abril de 2015 na cidade de São Paulo, Brasil.
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Theruvathu, Prasad Joseph Nellivilathekkathil. "Ineffabilis in the thought of Nicolas of Cusa." Münster Aschendorff, 2007. http://d-nb.info/993261892/04.
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Wirz, Richard Edward Culick F. "Discharge plasma processes of ring-cusp ion thrusters /." Diss., Pasadena, Calif. : California Institute of Technology, 2005. http://resolver.caltech.edu/CaltechETD:etd-05232005-162628.
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Krishnamurthy, Balasubramanya. "A comparison of the relative efficiency of tracking signals in forecast control." Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4942.
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Thesis (M.S.)--West Virginia University, 2006.Title from document title page. Document formatted into pages; contains ix, 94 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 91-94).
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McCulloh, Ian Pignatiello Joseph J. "Generalized cumulative sum control charts." Generalized cumulative sum control charts, 2004. http://etd.lib.fsu.edu/theses/available/etd-04122004-131857.
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Thesis (M.S.)--Florida State University, 2004.Advisor: Dr. Joseph J. Pignatiello, Jr., Florida State University, College of Engineering, Department of Industrial Engineering. Title and description from dissertation home page (viewed June 17, 2004). Includes bibliographical references.
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Backert, Rachel G. "A Nonlinear Approach to Gender bias in Leadership Emergence Perceptions." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/33851.
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The purpose of the present study was to examine the perceptual processes associated with gender differences in leadership emergence recognition. Prior research has indicated that females are less likely to be identified as an emerging leader, even when they display identical leadership behaviors as that of their male counterparts. Unlike most of the previous research performed in this area which has obtained only static snapshots of leadership recognition, the present study used a nonlinear dynamic modeling technique, called cusp catastrophe theory. It was predicted that a nonlinear model would account for more variance than a linear model. Furthermore, it was also predicted that participants would be more resistant to recognizing a female as an emerging leader, as compared to a male. This effect was expected to be greater for male participants than female participants. Participants included 19 organizational members, who watched videos of either a male or female emerging as the leader of a four-person group. Participants recorded their perceptions of leadership through a dynamic measure. In accordance with cusp catastrophe theory, results were analyzed using the program GEMCAT II (General Multivariate Methodology for Estimating Catastrophe Models). Contrary to expectations, none of the predictions were supported. It is suggested that this was primarily due to methodological issues, rather than the relevance of cusp catastrophe modeling for leadership perceptions. Recommendations for future work in this area are provided.Master of Science
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Larsen, Andrew. "Growth Studies of the Copper Sensing Histidine Kinase, Cuss." Thesis, The University of Arizona, 2011. http://hdl.handle.net/10150/144570.
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Nnamdi-Emetarom, Chioma Uzoamaka. "Role of CUSF In Copper Homeostasis in Escherichia Coli." Thesis, The University of Arizona, 2011. http://hdl.handle.net/10150/144915.
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Campbell-Platt, N. "Metaplectic cusp forms on the group SL2(Q(i))." Thesis, University College London (University of London), 2013. http://discovery.ucl.ac.uk/1396012/.
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The aim of this thesis is to contribute to the understanding of genuine cusp forms on the group SL2=Q(i), from a computational point of view. We show, via the generalised Eichler-Shimura-Harder isomorphism, that a genuine cusp form of cohomological type exists at level SL2(Z[i]; 4)SL2(Z). We show, by calculating cohomology groups, that such a form exists at weight (2; 2). Finally, we compute the genuine quotient of the Hecke algebra acting on representations of SL2(Q2(i)) containing non-zero SL2(Z2[i]; 4)SL2(Z2)- xed vectors. When such a representation $ corresponds to an unrami ed representation of SL2(Q2(i)), we show that the space of SL2(Z2[i]; 4)SL2(Z2)- xed vectors in $ is a sum of two 1-dimensional components. We determine which 1-dimensional representations arise in this way.
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Schafer, Wolfgang Erich. "Characterisation of sucrose synthase activity in the sugarcane culm." Thesis, Stellenbosch : University of Stellenbosch, 2004. http://hdl.handle.net/10019.1/16068.
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Dissertation (PhD)--University of Stellenbosch, 2004.ENGLISH ABSTRACT: This study had three main goals: 1. to investigate the occurrence on the protein level of sucrose synthase (SuSy) isoforms in sugarcane sink tissue, 2. to determine the kinetic properties of these isoforms, 3. to establish the tissue localisation of SuSy in the sugarcane culm The results are summarised below: Three SuSy isoforms were obtained from leaf roll tissue. The SuSyA and SuSyB isoforms differed in terms of charge characteristics, with SuSyA not binding to an anion exchange column that bound SuSyB and SuSyC under the same conditions. Both SuSyB and SuSyC isoforms were eluted at 180 mM KCl. The SuSyA and SuSyB isoforms were present during autumn, but during winter only the SuSyC isoform could be isolated. Even though they eluted at the same salt concentration, SuSyB and SuSyC were different isoforms, because they had different kinetic parameters, as well as different immunological properties. SuSyB and SuSyC could not have been mixtures of the same isoforms, since a polyclonal antiserum against SuSyB, which inactivates native SuSyB, did not inactivate SuSyC. All three isoforms had significantly different kinetic parameters, with the SuSyA isoform also having a much lower sucrose breakdown/synthesis ratio than the other two isoforms. Therefore, at least three SuSy isoforms occur in sugarcane leaf roll tissue on the protein level. The SuSyC isoform was subsequently kinetically characterised in detail. Data showed that the enzyme employs an ordered ternary complex mechanism, with UDP binding first and UDP-glucose dissociating last. These experimentally obtained kinetic parameters were then used to extend a kinetic model of sucrose accumulation. Data show that when the experimentally determined SuSy kineticparameters were entered into the model, a 40 % increase in sucrose concentration and 7 times reduction in fructose concentration resulted. These data illustrate the pronounced physiological effects that may result from the presence of different SuSy isoforms. SuSy protein localisation data, obtained by an immunohistochemical approach, indicated that SuSy protein was present in both storage parenchyma and vascular tissue of young, intermediate, and mature internodes. SuSy enzyme activity in different parts of the internodes was similar, except for internode 3, which had much higher activity in the bottom part of the internode, possibly because growth is faster here, hence a higher demand for sucrose cleavage exists here.
AFRIKAANSE OPSOMMING: Hierdie studie het ten doel gehad: 1. om die teenwoordigheid van sukrose sintase (SuSy) isovorme in suikkerriet swelgweefsel te ondersoek 2. om die kinetiese eienskappe van hierdie isovorme te ondersoek 3. om die weefsellokalisering van SuSy in die suikerrietstingel te bepaal Die resultate word hieronder opgesom: Drie SuSy isovorme is gevind in blaarrol weefsel. Die SuSyA en SuSyB isovorme het verskil in terme van ladingseienskappe, met SuSyA wat nie aan ‘n anioonuitruilkolom gebind het nie waaraan SuSyB en SuSyC wel onder dieselfde kondisies gebind het. Beide SuSyB en SuSyC isovorme is geëlueer van die kolom teen 180 mM KCl. Die SuSyA en SuSyB isovorme was teenwoordig gedurende herfs, maar in die winter was slegs SuSyC teenwoordig. Ten spyte van die feit dat SuSyB en SuSyC teen dieselfde soutkonsentrasie geëlueer is, het hulle verskillende isovorme verteenwoordig, aangesien hulle kinetiese en immunologiese eienskappe verskil het. SuSyB en SuSyC kon nie mengsels van dieselfde isovorme gewees het nie, want ‘n poliklonale antiserum teen SuSyB, wat SuSyB geïnaktiveer het, het nie SuSyC geïnaktiveer nie. Al drie isovorme het betekenisvol verskil wat kinetiese eienskappe betref, met die SuSyA isovorm wat ook ‘n baie laer sukrose afbraak/sintese verhouding gehad het as die ander twee isovorme. Daar is dus ten minste drie SuSy isovorme teenwoordig op die proteïen vlak in suikerriet blaarrol weefsel. Die in-detail kinetiese analise van die SuSyC isovorm het getoon dat die ensiem ‘n geordende drietallige kompleks meganisme het, met UDP wat eerste bind en UDP-glukose wat laaste dissosieer. Die eksperimenteel bepaalde kinetiese parameters is toe gebruik om ‘n kinetiese model van sukrose akkumulering uit tebrei. Data het getoon dat wanneer die generiese SuSy kinetiese parameters in die oorspronklike model vervang word met die eksperimenteel bepaalde waardes, die berekende sukrose konsentrasie met ongeveer 40 % toeneem, terwyl die fruktose konsentrasie ongeveer 7 keer afneem. Hierdie resultaat toon die groot fisiologiese effek wat die uitdrukking van verskillende SuSy isovorme op suikermetabolisme kan hê. Die SuSy proteïen lokaliseringsdata, wat met ‘n immunohistochemiese benadering verkry is, het aangedui dat SuSy in beide bergingsparenchiemselle sowel as vaatweefsel teenwoordig is in jong, intermediêre en volwasse internodes. SuSy ensiemaktiwiteit in verskillende dele van die internodes was soortgelyk, behalwe in internode 3, wat baie hoër aktiwiteit gehad het in die onderste deel van die internode as bo, moontlik weens vinniger groei in hierdie deel van die internode, wat afhanklik is van afbraakprodukte van sukrose.
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Topliss, Stephen Mark. "Particle features at the equatorward edge of the cusp." Thesis, University College London (University of London), 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342233.
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Dariva, Paulo. "A cadeia de cust?dia da prova gen?tica." Pontif?cia Universidade Cat?lica do Rio Grande do Sul, 2015. http://tede2.pucrs.br/tede2/handle/tede/6460.
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This work, presented as a requirement for obtaining the title of Master in Criminal Sciences in the postgraduate program in Criminal Sciences of the Pontifical Catholic University of Rio Grande do Sul, and in research of Contemporary Criminal Law Systems, seeks to analyze the contents and consequences of innovations brought by law n? 12.654, May 28, 2012, who introduced the genetics criminal identification in the brazilian legal system. To this end, the work, proceeded by the research of national and foreign doctrine literature, is divided into three distinct parts. In a first moment, will be examined the influence of science in criminal proceedings, especially in the formation of the belief of the judge, addressing, not only the concept of scientific evidence, as well as the criteria for admissibility and valuation. Secondly, will specifically address the genetics criminal identification in the Brazilian criminal law provided for analysis and their confrontation with the principle nemo tenetur se detegere. Finally, we must analyze the chain of custody of evidence, i.e., in addition to its significance, what procedures must be observed, so concatenated, in the collection and introduction of this kind of evidence in criminal proceedings, as well as the consequences of non-compliance with such procedures of caution.
O presente trabalho, apresentado como requisito para obten??o do t?tulo de Mestre em Ci?ncias Criminais no Programa de P?s-Gradua??o em Ci?ncias Criminais da Pontif?cia Universidade Cat?lica do Rio Grande do Sul, e que se insere na linha de pesquisa de Sistemas Jur?dico-Penais Contempor?neos, busca analisar o conte?do e as consequ?ncias das inova??es trazidas pela Lei n? 12.654, de 28 de maio de 2012, que introduziu a identifica??o criminal gen?tica no ordenamento jur?dico brasileiro. Para tanto, ? dividido em tr?s partes distintas, que analisar?o, mediante pesquisa eminentemente bibliogr?fica, seja pela doutrina nacional, seja estrangeira, as quest?es que, em nosso entender, s?o de maior relev?ncia na tem?tica abordada. Em um primeiro momento, analisar-se-? a influ?ncia da ci?ncia no processo penal, principalmente na forma??o da convic??o do julgador, abordando-se, ainda, n?o s? a conceitua??o da prova cient?fica, como tamb?m os crit?rios de admissibilidade e de valora??o a serem considerados quando de sua an?lise pelo julgador. Em segundo lugar, abordar-se-? especificamente a identifica??o criminal gen?tica no ordenamento jur?dico-penal brasileiro, com a an?lise da legisla??o referida e sua confronta??o com o princ?pio nemo tenetur se detegere. Por fim, cumpre analisar a cadeia de cust?dia da prova, ou seja, al?m de seu significado, quais os procedimentos devem ser observados, de modo concatenado, na coleta e introdu??o dessa esp?cie de prova no processo penal, bem como as consequ?ncias da n?o observ?ncia de tais procedimentos de cautela.
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Henning, Elisa. "Aperfeiçoamento e desenvolvimento dos gráficos combinados Shewhart-Cusum binomiais." reponame:Repositório Institucional da UFSC, 2012. http://repositorio.ufsc.br/xmlui/handle/123456789/94399.
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Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia de Produção, Florianópolis, 2010Made available in DSpace on 2012-10-25T09:28:47Z (GMT). No. of bitstreams: 1 287163.pdf: 2736363 bytes, checksum: 7825e6acd30e7b72ad98c014d015db37 (MD5)
Os tradicionais gráficos de controle Shewhart são considerados efetivos na detecção de grandes mudanças na média, variância ou na fração não conforme, enquanto que gráficos de controle de soma cumulativa (CUSUM) são recomendados para a sinalização de pequenas e moderadas alterações nestes parâmetros. Nenhum dos gráficos mencionados terá um bom desempenho em todas as situações. Uma solução possível para este problema é combinar múltiplos gráficos para abranger mudanças de diversas magnitudes. Assim, um gráfico combinado Shewhart-CUSUM tem como finalidade aumentar a sensibilidade do procedimento CUSUM para alterações maiores. Este trabalho traz várias contribuições para o desenvolvimento e aperfeiçoamento de gráficos combinados Shewhart-CUSUM para dados com distribuição binomial. Inicialmente, a partir do resultado de simulações, analisa-se o desempenho de um gráfico combinado e, se a adição de linhas Shewhart a um gráfico CUSUM binomial unilateral superior realmente aumenta a sensibilidade deste. O desempenho de um gráfico combinado Shewhart-CUSUM é também comparado com o gráfico tipo Shewhart e com procedimentos CUSUM delineados para detecção de mudanças maiores. Pensando em aplicações, foi elaborada uma metodologia para construção de um gráfico combinado incluindo a análise das suposições necessárias (aderência, autocorrelação e superdispersão). Para finalizar, esta metodologia foi aplicada a dados adaptados da literatura e também de processos reais. O trabalho ainda contempla algumas contribuições adicionais como o uso de limites exatos (ou probabilísticos) na parte Shewhart do gráfico combinado e uma proposta de aproximação para o limite superior do CUSUM binomial. Os resultados obtidos revelam que o gráfico combinado Shewhart-CUSUM aumenta a sensibilidade de um gráfico CUSUM binomial para magnitudes de mudança maiores que as de planejamento e identificou-se a existência de uma região onde o gráfico combinado tem desempenho superior aos dois gráficos individuais. Os resultados das aplicações foram satisfatórios, validando a metodologia elaborada. A partir das aplicações foram sinalizadas situações práticas onde o gráfico combinado é mais efetivo que os gráficos individuais.
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Boldrini, Pierre. "The cusp-core problem in dwarf galaxies : new solutions." Thesis, Sorbonne université, 2020. http://www.theses.fr/2020SORUS082.
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Cette thèse porte sur la nature de la matière noire (MN) et plus particulièrement sur le problème de la disparité des profils de densité interne de MN dans les galaxies naines, le problème « cusp-core". Nous avons commencé par réétudier ce problème pour la galaxie naine, Fornax, en utilisant la distribution spatiale et de masse des amas globulaires observée afin de contraindre le profil de MN. Ensuite, nous avons démontré avec des simulations N-corps que les minihalos de MN, en tant que nouvelle composante des amas globulaires, résolvent à la fois le "timing problem" et le problème "cusp-core" dans Fornax — dans le cas où les amas globulaires ont été récemment accrétés. Par ailleurs, nous avons examinés si les candidats de MN sous la forme de trous noirs primordiaux (TNP) peuvent résoudre ce problème dans les galaxies de faible masse. Ce mécanisme fonctionne pour les TNPs entre 25 et 100 Msol mais nécessite que la masse de la population de TNPs soit plus de 1% de la masse totale de MN dans les galaxies naines. Ensuite, nous avons démontré qu'en transférant de l’énergie par friction dynamique dans le centre des galaxies naines, le trou noir central est éjecté à des dizaines de parsecs. Enfin, nous démontrons que l'accrétion d'un satellite sur une orbite très excentrique provoque la formation d'un coeur de MN et explique également que le trou noir central soit décentré dans M31This doctoral research focuses on the nature of the dark matter (DM) and more particularly on the inconsistency of inner DM density profiles in dwarf galaxies, the cusp-core problem. We have found new resolutions of this cold DM challenge at small scales using high resolution fully GPU N-body simulations. First, we have re-investigated the Fornax cusp-core problem using observational results on the spatial and mass distributions of globular clusters in order to put constraints on the DM profile. Then, N-body simulations were designed to demonstrate that DM minihalos, as a new component of globular clusters, resolve both the timing and cusp-core problems in Fornax if the globular clusters were recently accreted. Secondly, we have examined whether DM candidates in the form of PBHs can solve the cusp-core problem in low-mass galaxies. This mechanism works for PBHs in the 25-100 Msol mass window but requires a lower limit on the PBH mass fraction of 1% of the total dwarf galaxy DM content. Then, we have demonstrated that subhalos sink and transfer energy via dynamical friction into the centres of dwarf galaxies. This dynamical heating kicks any central intermediate massive BH out to tens of parsecs. Finally, we demonstrate that accretion of a satellite on a highly eccentric orbit causes the formation a DM core and naturally explains a present BH offset by sub-parsecs in M31
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Savala, Paul. "Computing spectral data for Maass cusp forms using resonance." Diss., University of Iowa, 2016. https://ir.uiowa.edu/etd/3182.
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The primary arithmetic information attached to a Maass cusp form is its Laplace eigenvalue. However, in the case of cuspidal Maass forms, the range that these eigenvalues can take is not well-understood. In particular it is unknown if, given a real number r, one can prove that there exists a primitive Maass cusp form with Laplace eigenvalue 1/4 + r2. Conversely, given the Fourier coefficients of a primitive Maass cusp form f on Γ0(D), it is not clear whether or not one can determine its Laplace eigenvalue. In this paper we show that given only a finite number of Fourier coefficients one can first determine the level D, and then compute the Laplace eigenvalue to arbitrarily high precision. The key to our results will be understanding the resonance and rapid decay properties of Maass cusp forms. Let f be a primitive Maass cusp form with Fourier coefficients λf (n). The resonance sum for f is given by SX(f;α;β) = Εn≥1λf(n)‑Φ(n/X) e(αnβ) where φ ∈ Cc∞((1, 2)) is a Schwartz function and α ∈ R and β, X > 0 are real numbers. Sums of this form have been studied for many different classes of functions f, including holomorphic modular forms for SL(2, Z), and Maass cusp forms for SL(n,Z). In this paper we take f to be a primitive Maass cusp form for a congruence subgroup Γ0(D) ⊂ SL(2, Z). Thus our result extends the family of automorphic forms for which their resonance properties are understood. Similar analysis and algorithms can be easily implemented for holomorphic cusp forms for Γ0(D). Our techniques include Voronoi summation, weighted exponential sums, and asymptotics expansions of Bessel functions. We then use these estimates in a new application of resonance sums. In particular we show that given only limited information about a Maass cusp form f (in particular a finite list of high Fourier coefficients), one can determine its level and estimate its spectral parameter, and thus its Laplace eigenvalue. This is done using a large parallel computing cluster running MATLAB and Mathematica
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Nguyen, Trung Kien. "Conception et réalisation d’un système de gestion intelligente de la consommation électrique domestique." Thesis, Nice, 2015. http://www.theses.fr/2015NICE4127/document.
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NIALM (Non-Intrusive Load Monitoring) est une technologie innovante qui permet de suivre la consommation individuelle en énergie des différents appareils électriques dans un réseau électrique grâce à un seul point de mesure. Ainsi, l’installation et la maintenance du système est très simple. Cependant, le logiciel NIALM nécessite le développement d’algorithmes sophistiqués pour identifier la consommation de chaque appareil avec une bonne précision. Par conséquent, ces algorithmes complexes nécessitent une plate-forme d’exécution puissante et coûteuse. En réponse à ce problème, cette thèse propose un système NIALM innovant fonctionnant en temps réel et à faible coût. Ce système permet de dépasser certaines limites actuelles du NIALM grâce à une extraction d’informations supplémentaires sur les signatures électriques, une détection des transitions lentes et des appareils à multi-états grâce à deux nouvelles fonctions : un algorithme de détection d'événements CUSUM et une ventilation des sommes cumulées en se basant sur un algorithme génétique. La deuxième contribution importante est de proposer une méthodologie utilisant le modèle RPN (Reactive Process Network) pour développer le système NIALM dans un SoC (System on Chip) avec une accélération matérielle de type FPGA. Ce SoC permet ainsi l'exécution en parallèle dans le FPGA de processus de traitement de données avec des algorithmes complexes tout en satisfaisant les contraintes de temps. Les avantages de notre méthode sont : la capacité de développer une spécification exécutable, d’effectuer une exploration d'architecture, et d’obtenir rapidement un prototype du système NIALM à partir d’un même modèle applicatifIn comparison to conventional smart meters, NIALM (Non-Intrusive Load Monitoring) is an innovative technology because it can monitor power usage on individual appliances in an electrical network using only one sensing node. Thus, setting up and maintaining the system is very simple because of the few of hardware elements. In contrast, the software of NIALM is often very complex and there is still the need in developing more complex algorithms to classify appliances more accurately. These complex algorithms of NIALM require to run on a powerful and expensive hardware platform. In order to overcome this problem, the first contribution of this thesis is to propose a low cost real-time innovative NIALM system to solve some limits of NIALM design by extracting more electrical signatures, detecting slow transition and multi-state appliances, and energy disaggregation in real-time. This is possible by using two new algorithms: CUSUM event detection algorithm and disaggregation based on Genetic Algorithm. Similar to complex DSP systems, a NIALM system contains both event control processes and data streaming processes. The second important contribution of this research is to propose a methodology based on RPN model (Reactive Process Network) to develop a complex NIALM system in SoC with FPGA acceleration. Such SoC allows running data streaming processes with complex algorithms and hard timing constraints in parallel in FPGA while other processes can run in processors. The advantages of our methodology are the ability to develop an executable specification to proceed to architecture exploration, and prototype the NIALM system quickly using the same application model
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Cruickshank, John Louis. "Headingley-cum-Burley c1540 to c1784." Thesis, University of Leeds, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403053.
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Lalancette, Marc. "Gravitational waves from a string cusp in Einstein-aether theory." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/643.
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The motivation of this thesis is to look for a signature of Lorentz violation, hopefully observable, in the gravitational waves emitted by cosmic strings. Aspects of cosmic strings are reviewed, in particular how focused bursts of gravitational radiation are emitted when a cusp forms on the string. The same phenomenon is then studied in an effective field theory with Lorentz violation called Einstein-aether theory. This is a simple theory with a dynamic preferred frame, but it retains rotational and diffeomorphism invariance. The linearized version of the theory produces five wave modes. We study the usual transverse traceless modes which now have a wave speed that can be lower or greater than the speed of light. This altered speed produces distinctive features in the waves. They depend on two free parameters: roughly the wave speed and the acceleration of the string cusp. The profile of the wave is analyzed in detail for different values of the parameters and explained by close comparison with the string motion.
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Dunbar, Martin Xavier. "Analysis and design of one- and two-sided CUSUM charts with known and estimated parameters." Click here to access thesis, 2007. http://www.georgiasouthern.edu/etd/archive/spring2007/martin_x_dunbar/Dunbar_Martin_X_200701_MS.pdf.
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Thesis (M.S.)--Georgia Southern University, 2007."A thesis submitted to the Graduate Faculty of Georgia Southern University in partial fulfillment of the requirements for the degree Master of Science." Under the direction of Charles W. Champ. ETD. Electronic version approved: May 2007. Includes appendices.
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Ahmadi, Firouzabad Abdolhadi. "Introgression of resistance to powdery mildew (Erysiphe graminis f.sp. tritici) from alien species into bread wheat (Triticum aestivum)." Thesis, University of Newcastle Upon Tyne, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340688.
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VanBrackle, Lewis N. "EWMA and CUSUM control charts in the presence of correlation." Diss., This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-07282008-134346/.
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Rowlands, David Hywel. "A cusp gun and novel mircowave components for gyro-devices." Thesis, University of Strathclyde, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.510906.
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