O modelo semiparamétrico de Cox é frequentemente utilizado na modelagem de dados de sobrevivência, pois é um modelo muito flexível e permite avaliar o efeito das covariáveis sobre a taxa de falha. Uma das principais vantagens é a fácil interpretação, de modo que a razão de riscos de dois indivíduos não varia ao longo do tempo. No entanto, em algumas situações a proporcionalidade dos riscos para uma dada covariável pode não ser válida e, este caso, uma abordagem que não dependa de tal suposição é necessária. Nesta tese, propomos um modelo tipo Cox em que o efeito da covariável e a função de risco basal são representadas via bases de Fourier e ondaletas de Haar clássicas e deformadas. Propomos também um procedimento de predição da função de sobrevivência para um paciente específico. Estudos de simulações e aplicações a dados reais sugerem que nosso método pode ser uma ferramenta valiosa em situações práticas em que o efeito da covariável é dependente do tempo. Por meio destes estudos, fazemos comparações entre as duas abordagens propostas, e comparações com outra já conhecida na literatura, onde verificamos resultados satisfatórios. / The semiparametric Cox model is often considered when modeling survival data. It is very flexible, allowing for the evaluation of covariates effects. One of its main advantages is the easy of interpretation, as long as the rate of the hazards for two individuals does not vary over time. However, this proportionality of the hazards may not be true in some practical situations and, in this case, an approach not relying on such assumption is needed. In this thesis we propose a Cox-type model that allows for time-varying covariate effects, for which the baseline hazard is based on Fourier series and wavelets on a time-frequency representation. We derive a prediction method for the survival of future patients with any specific set of covariates. Simulations and an application to a real data set suggest that our method may be a valuable tool to model data in practical situations where covariate effects vary over time. Through these studies, we make comparisons between the two approaches proposed here and comparisons with other already known in the literature, where we verify satisfactory results.

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / This research aims to promote the construction of points of view (POV) among students of the 9th year of elementary school, enrolled in the ESWF School, located in the city of Estância - Sergipe, when they position themselves on themes related to social events. Because it is considered a category that is at the center of dialogism (RABATEL, 2005), the POV shows a cross-perspective, so it can be elaborated on the basis of different linguistic resources, among which are the strategies of constructing implicit and the direction of argumentative operators, which are linked to communicative purposes. Understanding as a linguistic and enunciative concept, the POV allows the expression of a subject's subjectivity through articulated positions in texts, which requires attention to the discursive and lexical choices, for the sentence structure, for the use of linguistic- arguments for the composition of paragraphs as well as for the mechanisms for progression of ideas that contribute to coherence. The intention to collaborate with the practices of other teachers directed the choice for the elaboration of a Pedagogical Notebook in which the sequence of activities directed to the production of POV by students of basic education will be found. This research is exploratory, since it brings together the teaching productions, made based on the theoretical basis and the needs of the classroom, whose results were obtained by the students after the analysis of the productions made in class. The set of pedagogical actions provided the students with writing practices whose productions allowed to observe that students have an ability to establish relationships between texts and social contexts, as well as to understand and use the linguistic elements that collaborate with the organization of a discursive positioning. We conclude, then, that student participation in language practices associated with social problems can be a satisfactory textual production strategy to the development of well elaborated points of view. In addition, we note that the teacher needs to assume the role of collaborator in this process through the articulation of activities and mediator at the moment of the exchange of views points. / Esta pesquisa tem por objetivo promover a construção de pontos de vista (PDV) entre estudantes do 9º ano do ensino fundamental, matriculados no colégio CESWF, localizado no município de Estância – Sergipe, quando se posicionam a partir de temas relacionados a acontecimentos sociais. Por ser considerada uma categoria que se situa no centro do dialogismo (RABATEL, 2005), o PDV evidencia o cruzamento de perspectivas, por isso pode ser elaborado com base em diferentes recursos, entre os quais se encontram as estratégias de construção de implícitos e o direcionamento de operadores argumentativos, que estão ligados a propósitos comunicativos. Compreendido como um conceito linguístico e enunciativo, o PDV possibilita a expressão da subjetividade de um sujeito por meio de posicionamentos articulados em textos, o que requer atentar para as escolhas discursivas e lexicais, para a estruturação de sentenças, para o uso de articuladores linguístico-argumentativos, para a composição de parágrafos, bem como para os mecanismos de progressão de ideias que colaboram com a coerência. A intenção de colaborar com as práticas de outros professores direcionou a escolha para a elaboração de um Caderno Pedagógico no qual será encontrada a sequência de atividades voltadas à produção de PDV por estudantes de educação básica. Esta pesquisa configura-se como exploratória, uma vez que reúne as produções docentes, confeccionadas com base na fundamentação teórica e nas necessidades de sala de aula, cujos resultados foram obtidos pelos estudantes após a análise das produções realizadas em classe. O conjunto de ações pedagógicas proporcionou aos discentes práticas de escrita cujas produções permitiram observar que os estudantes têm facilidade para estabelecer relações entre os textos e os contextos sociais, bem como para compreender e utilizar os elementos linguísticos que colaboram com a organização de um posicionamento discursivo. Concluímos, então, que a participação discente em práticas de linguagem, associadas a problemas sociais, pode ser uma estratégia de produção textual satisfatória ao desenvolvimento de pontos de vista bem elaborados. Além disso, notamos que o professor precisa assumir o papel de colaborador nesse processo por meio da articulação das atividades e de mediador no momento das trocas de pontos de vista. / São Cristóvão, SE

O modelo semiparamétrico de Cox é frequentemente utilizado na modelagem de dados de sobrevivência, pois é um modelo muito flexível e permite avaliar o efeito das covariáveis sobre a taxa de falha. Uma das principais vantagens é a fácil interpretação, de modo que a razão de riscos de dois indivíduos não varia ao longo do tempo. No entanto, em algumas situações a proporcionalidade dos riscos para uma dada covariável pode não ser válida e, este caso, uma abordagem que não dependa de tal suposição é necessária. Nesta tese, propomos um modelo tipo Cox em que o efeito da covariável e a função de risco basal são representadas via bases de Fourier e ondaletas de Haar clássicas e deformadas. Propomos também um procedimento de predição da função de sobrevivência para um paciente específico. Estudos de simulações e aplicações a dados reais sugerem que nosso método pode ser uma ferramenta valiosa em situações práticas em que o efeito da covariável é dependente do tempo. Por meio destes estudos, fazemos comparações entre as duas abordagens propostas, e comparações com outra já conhecida na literatura, onde verificamos resultados satisfatórios. / The semiparametric Cox model is often considered when modeling survival data. It is very flexible, allowing for the evaluation of covariates effects. One of its main advantages is the easy of interpretation, as long as the rate of the hazards for two individuals does not vary over time. However, this proportionality of the hazards may not be true in some practical situations and, in this case, an approach not relying on such assumption is needed. In this thesis we propose a Cox-type model that allows for time-varying covariate effects, for which the baseline hazard is based on Fourier series and wavelets on a time-frequency representation. We derive a prediction method for the survival of future patients with any specific set of covariates. Simulations and an application to a real data set suggest that our method may be a valuable tool to model data in practical situations where covariate effects vary over time. Through these studies, we make comparisons between the two approaches proposed here and comparisons with other already known in the literature, where we verify satisfactory results.

Social science researchers are increasingly using multi-group confirmatory factor analysis (MG-CFA) to compare different groups' latent variable means. To ensure that a MG-CFA model is identified, two approaches are commonly used to set the scale of the latent variable. The reference indicator (RI) strategy, which involves constraining one loading per factor to a value of one across groups, assumes that the RI has equal factor loadings across groups. The second approach involves constraining each factor's variance to a value of one across groups and, thus, assumes that the factor variances are equal across groups. Latent mean differences may be tested and described using Gonzalez and Griffin's (2001) likelihood ratio test (LRT[subscript k]) and Hancock's (2001) standardized latent mean difference effect size measure ([delta subscript k]), respectively. Applied researchers using the LRT[subscript k] and/or the [delta subscript k] when comparing groups' latent means may not explicitly test the assumptions underlying the two factor scaling methods. To date, no study has examined the impact of violating the assumptions associated with the two scaling methods on latent mean comparisons. The purpose of this study was to assess the performance of the LRT[subscript k] and the [delta subscript k] when violating the assumptions underlying the RI strategy and/or the factor variance scaling method. Type I error and power of the LRT[subscript k] as well as relative parameter bias and parameter bias of the [delta subscript k] were examined when varying loading difference magnitude, factor variance ratio, factor loading pattern and sample size ratio. Rejection rates of model fit indices, including the x² test, RMSEA, CFI, TLI and SRMR, under these varied conditions were also examined. The results indicated that violating the assumptions underlying the RI strategy did not affect the LRT[subscript k] or the [delta subscript k]. However, violating the assumption underlying the factorvariance scaling method influenced Type I error rates of the LRT[subscript k], particularly in unequal sample size conditions. Results also indicated that the four factors manipulated in this study had an impact on correct model rejection rates of the model fit indices. It is hoped that this study provides useful information to researchers concerning the use of the LRT[subscript k] and [delta subscript k] under factor scaling method assumption violations. / text

Veliuonos Švč. Mergelės Marijos Ėmimo į dangų bažnyčioje sukaupta didelė dalis miestelio meno paveldo. Tai vertingi dailės, skulptūrinės plastikos, medžio drožybos, smulkiosios architektūros, auksakalystės kūriniai. Nepaisant to, iki šiol nebuvo atliktas nė vienas išsamus tyrimas, apimantis Veliuonos bažnyčios meno paveldą kaip visumą. Šiuo darbu siekiama sistemingai išanalizuoti bažnyčioje esančias meno vertybes ir jų pažinimo, pasitelkiant kultūrinį turizmą ir piligrimystę, galimybes. Magistro diplominis darbas papildo senosios dailės istorijos mokslą nauja medžiaga apie bažnyčios meno kūrinių raidą ir kaitą, datavimą, autorystę. Jame: a) išaiškinta bažnyčios pastatymo data; b) nustatytas didžiojo altoriaus ir atskirų jo sudedamųjų dalių datavimas; c) išaiškinta didžiojo altoriaus paveikslų, o taip pat šv. Jono Nepomuko paveikslo bei Rožinio Švč. Mergelės Marijos paveikslo aptaisų autorystė; d) nustatyti ankstyviausių bažnyčios altorių titulai; e) rekonstruotas ankstyvesnio, 1644 m. konsekruoto titulinio altoriaus vaizdas, atkurti ankstesni visų altorių paveikslų siužetai; f) remiantis šaltinių analize pateikta naujų faktografinių žinių apie XVIII-XIX a. bažnyčioje buvusius iliuzinius altorius; g) pirmą kartą ištirta bažnyčios dailės ikonologija ir apibendrinta ikonografinė programa; h) pirmą kartą atlikta epitafijos J. K. Bžostovskiui teksto semiotinė analizė; i) aptartos stilistinės ir meninės bažnyčios ypatybės; j) pasiūlytos bažnyčios meno paveldo sklaidos visuomenėje... [toliau žr. visą tekstą] / St. Blessed Virgin Mary of the Assumption Church of Veliuona in the town gained a large part of artistic heritage. This is a valuable art, sculpture, wood carving, fine architecture, farrier works. Nevertheless, so far none has been carried out a detailed survey, covering the artistic heritage church as a whole. This work aims to systematically analyze the church's values in art and knowledge through cultural tourism and pilgrimage, the possibilities. Master's thesis complements the old art history education in the new material on church art and the evolution of change, dating, authorship. There are: a) Church of the anniversary of the date; b) the great altar, and its individual components dating; c) the altar of the great paintings, and also St. John Nepomuk and the image of the Blessed Pink. Virgin Mary's picture authorship arch; d) the altar of the church's earliest titles; e) reconstructed earlier, in 1644, consecrated the altar of a cover image, the former altar paintings of scenes; f) based on an analysis of the sources of new knowledge about faktografinių XVIII-XIX centuries shadowy former church altar; g) Performed for the first time in church art iconographic analysis and summary program; h) first performed epitaphs J. K. Bzostovskis semiotic text analysis; i) discussed in stylistic, iconographic and artistic properties; j) artistic heritage of the Church of the proposed public dissemination possibilities: there are types of excursions and pilgrimage route... [to full text]

This M.A. thesis consists of a close-textual reading of Sor Juana Inés de la Cruz’s four sets of villancicos dedicated to the Assumption of the Virgin Mary (1676, 1679, 1685 and 1690), with a special focus on Sor Juana’s marianism and a contrast with Juan Correa’s painting, La Asunción de la Virgen (1689). This thesis will cover Sor Juana’s innovation in her representation of Mary as a model of femininity, Mary’s creative abilities, the crowning of Mary, Mary as a dwelling for God, Sor Juana’s feminization of the divine, Mary’s Assumption itself, masculine aspects and professions attributed to Mary, and Sor Juana’s identification with the Virgen.

Thesis (Ph. D.)--Illinois State University, 1995. / Title from title page screen, viewed May 16, 2006. Dissertation Committee: John R. McCarthy (chair), Larry D. Kennedy, David L. Tucker, Lemuel W. Watson. Includes bibliographical references (leaves 81-88) and abstract. Also available in print.

Abstract Increasing information systems (IS) security breaches require investments in terms of IS security techniques/practices or personnel. Prior research on IS security investment has provided economic models based on neoclassical economics to assess how much to invest in IS security. These models assume that the goal of IS security investment is only benefit maximization, and that all of the actors involved are unbiased rational actors with complete information. It is argued in this thesis that these prior models for IS security investment are flawed for two reasons. First, benefit maximization is not an appropriate goal for IS security investment, because the benefits and costs of IS security investment cannot be reliably calculated. Second, decision makers are not unbiased rational actors, because they do not have enough information to make IS security investment decisions. To address these concerns, this thesis outlines a framework for IS security investment, which is based on behavioral economics. This framework makes new assumptions about IS security investment decision makers, and redefines the contextual nature of IS security investment. As an example of how to operationalize this framework in IS research, this thesis examines IS security investment decision-making by using a theoretical model drawn from reputational herding theory. A field study for empirical testing of the model was conducted, which involved surveying 88 information security experts in Finland. The results of the field study not only confirm the new framework, but also identify several motives that strongly predict IS security investment. In this thesis the assumptions proposed for the framework have also been also tested in a different research setting: the unauthorized uploading behavior of digital goods. This study involves 220 respondents, and the findings suggest that the proposed assumptions for the framework are also applicable in that new research setting. Overall, this doctoral thesis contributes to IS research by providing a framework to increase the overall understanding of how IS security managers make decisions with regard to IS security investment; moreover, this thesis presents empirically-grounded implications for how practitioners can improve the quality of their IS security investments. / Tiivistelmä Jatkuvasti lisääntyvät tietoturvaloukkaukset edellyttävät investointeja tietoturvatekniikoihin/käytänteisiin tai henkilöstöön. Aikaisempi tietoturvainvestointitutkimus on kehittänyt neoklassiseen taloustieteeseen perustuvia taloudellisia malleja tietoturvainvestointien määrän arvioimiseksi. Nämä mallit olettavat, että tietoturvainvestointien tavoitteena on ainoastaan hyötyjen maksimointi ja että kaikki toimijat ovat täydellisen tiedon pohjalta toimivia, puolueettomia ja rationaalisia. Tässä väitöskirjassa esitetään, että aikaisemmat tietoturvainvestointimallit ovat puutteellisia kahdesta syystä. Yhtäältä hyödyn maksimointi ei sovellu hyvin tietoturvainvestointien tavoitteeksi, koska sen hyötyjä ja kustannuksia ei voida luotettavasti laskea. Toisaalta päätöksentekijät eivät ole puolueettomia rationaalisia toimijoita, koska heillä ei ole käytettävissään tarpeeksi tietoa tietoturvainvestointipäätösten tekemiseksi. Nämä asiat huomioidaan tässä väitöskirjassa kehittämällä käyttäytymistaloustieteeseen perustuva tietoturvainvestointien viitekehys. Viitekehys esittää uusia olettamuksia tietoturvainvestointeja tekevistä päätöksentekijöistä ja tietoturvainvestointien kontekstuaalisesta luonteesta Väitöskirjassa havainnollistetaan kehitetyn viitekehyksen soveltamisesta tietojärjestelmätieteen tutkimuksessa tarkastelemalla tietoturvainvestointeihin liittyvää päätöksentekoa maineeseen perustuvan laumateorian (reputational herding theory) pohjalta laaditun teoreettisen mallin näkökulmasta. Kenttätutkimuksessa mallin testaamiseksi empiirisesti laadittiin kysely, johon vastasi 88 tietoturva-asiantuntijaa Suomessa. Kenttätutkimuksen tulokset sekä vastasivat uutta viitekehystä että toivat esiin useita tietoturvainvestointeja vahvasti ennustavia motiiveja. Väitöskirjassa kehitetyn viitekehyksen olettamuksia testattiin myös toisentyyppisessä tutkimusasetelmassa: digitaalisten hyödykkeiden luvaton lataaminen. Tähän tutkimukseen osallistui 220 vastaajaa, ja löydökset osoittavat esitettyjen olettamusten olevan hyödynnettävissä myös tässä uudessa tutkimusasetelmassa. Kaiken kaikkiaan tämän väitöskirjan kontribuutio tietojärjestelmätieteelle on sen tarjoama viitekehys, joka lisää ymmärrystä siitä, kuinka tietoturvapäälliköt tekevät tietoturvainvestointeihin liittyviä päätöksiä. Väitöskirja esittää myös empiiriseen tutkimukseen pohjautuvia käytännön implikaatioita tietoturvainvestointien laadun parantamiseksi.

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