Ce travail met en œuvre un processus d'effacement de la figuration par la lumière, mais également par l'utilisation du blanc en tant que matière. La forme devient fantomatique, apparaît en filigrane, et disparaît aux confins de la représentation. Cette recherche se déploie à travers une installation plastique qui invite le spectateur à une lecture visuelle en épaisseur. Il s'agit de mettre en lumière par diffraction quelques figures prélevées dans l'Apocalypse de Saint Jean. J'ai ainsi imaginé de prendre appui sur ce texte fondateur. Tel le parergon Derridien, il lui a servi de cadre et de cartouche pour définir à la fois un lieu et proposer le chemin qui mène au dévoilement. C'est au dessin effacé par le geste peint et qui retourne à la blancheur, que j'ai confié cette mission, pour traduire la fragilité de la condition humaine. La représentation qui se retire laisse l'incertain de la vision d'imprimer dans un point par point. A l'horizon de cette quête, née de la lecture du texte et de son écriture plastique, se révèle enfin un visage. Un visage d'humanité alternant entre les dualités multiples de l'existence. Ce travail est un chemin vers l'effacement, vers le retrait. Il se veut un en deçà qui rencontre un au-delà. / This work sets up a fading process in figuration with the use of light but also white as matter. Form becomes phantasmal appears as filigree and disappears in the confines of representation. This research is deployed via a plastic art installation which invites the spectator to experience an in-depth interpretation. Figures taken from the Apocalypse of Saint John are illuminated by diffraction. I thus used this mythical text as a support for the project like Jacques Derrida's parergon, where he used it as a framework and cartouche to define both a place and a pathway which leads to a revelation. It is the blotted out painted drawing reverting to whiteness, which serves this purpose in order to interpret the fragility of human condition. The representation which fades reveals an uncertain vision expressed in a point by point. The end result of this quest born from a reading of the scripture and the artist's gesture is ultimately, a face -a face expressing humanity, alternating between the multiple dualities of existence. This work is a pathway towards the fading withdrawal of an image. It aims to be this side which encounters the beyond.

Submitted by Fernanda Puga Santos null (ferpuga@gmail.com) on 2016-04-05T19:55:10Z No. of bitstreams: 1 Tese_FINAL.pdf: 3778155 bytes, checksum: 12218385281bca2455fe3172e45e514c (MD5) / Approved for entry into archive by Felipe Augusto Arakaki (arakaki@reitoria.unesp.br) on 2016-04-07T16:09:03Z (GMT) No. of bitstreams: 1 carvalho_fps_dr_prud.pdf: 3778155 bytes, checksum: 12218385281bca2455fe3172e45e514c (MD5) / Made available in DSpace on 2016-04-07T16:09:03Z (GMT). No. of bitstreams: 1 carvalho_fps_dr_prud.pdf: 3778155 bytes, checksum: 12218385281bca2455fe3172e45e514c (MD5) Previous issue date: 2016-03-31 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Slope streaks são rastros escuros que se estendem por declives íngremes na superfície de Marte. Estes rastros representam um dos poucos processos geológicos ativos na superfície deste planeta. Atualmente, muitos pesquisadores os têm estudado com a finalidade de descobrir sua natureza, a qual permanece controversa. Além disso, os slope streaks clareiam com o tempo, fornecendo pistas sobre a deposição de poeira e também sobre a natureza do material da superfície. Embora exista um número considerável de pesquisadores que estudam esses rastros, a identificação destes ainda é realizada por especialistas manualmente, através de amostras de pequena dimensão. A existência de um número elevado destas estruturas na superfície de Marte, a necessidade de caracterizá-las e também de quantificar a sua evolução temporal, não pode continuar a ser efetuada simplesmente por amostragem e de uma forma manual. É neste contexto que esta pesquisa se enquadra. A proposta consiste em contribuir para a automação do processo de extração de informações em imagens da superfície de Marte, especificamente, extração de informações sobre slope streaks. Através do desenvolvimento de um método de detecção automática de slope streaks em imagens orbitais e, também, de um método automático para análise temporal da taxa de esmaecimento, este objetivo foi alcançado neste trabalho. O método de detecção desenvolvido baseia-se principalmente em Morfologia Matemática e faz uso de operadores morfológicos conectados para o pré-processamento das imagens, transformada top-hat, binarização pelo método de Otsu, afinamento e reconstrução geodésica, seguido por um filtro de fator de forma. O método para a análise temporal desenvolvido consiste em um algoritmo que calcula a taxa de contraste entre o interior e a área de vizinhança de um mesmo rastro, em imagens multi-temporais registradas. Os resultados obtidos com ambos os métodos foram bastante satisfatórios e possibilitaram extrair informações inovadoras a respeito do comportamento destes rastros na superfície de Marte. As duas ferramentas desenvolvidas mostraram-se robustas para serem aplicadas a grande escala e a um grande conjunto de imagens. / Slope streaks are typically dark, narrow and fan-shaped features that extend down slope on Mars surface. They are one of the most active and dynamic process observed on the planet’s surface. Dry and wet processes have been suggested for causing their formation but their origin is still unclear. Moreover, the streaks tend to fade with time, providing clues about dust settling and material properties. Studies that quantify some characteristics of these streaks are based on manual interactive procedures to delineate only a small portion of the available slope streaks and to measure their morphometric characteristics. The availability of a methodology to segment the streaks and to extract meaningful information would naturally increase the regional knowledge and the statistical significance, as a much larger amount of images from different locations could be analyzed, together with a more complete monitoring of the fading/appearance of the dark streaks. Thus, the purpose of this research is to contribute to the information extraction process from surface images of Mars. Hence, a method to automatically detect slope streaks and an algorithm to quantify the temporal fading of each streak over the years were developed. The detection method was based on morphological operators and it was used in a part of the methodology to quantify the fading of the streaks. The results of the detection method and the temporal fading algorithm were very satisfactory. Both methods are able to extract information about the behaviour of the slope streaks on the Martian surface. Finally, the two tools are robust enough to be applied on a large scale and a large set of images. / CAPES: 12791-13-0

abstract: Distributed inference has applications in fields as varied as source localization, evaluation of network quality, and remote monitoring of wildlife habitats. In this dissertation, distributed inference algorithms over multiple-access channels are considered. The performance of these algorithms and the effects of wireless communication channels on the performance are studied. In a first class of problems, distributed inference over fading Gaussian multiple-access channels with amplify-and-forward is considered. Sensors observe a phenomenon and transmit their observations using the amplify-and-forward scheme to a fusion center (FC). Distributed estimation is considered with a single antenna at the FC, where the performance is evaluated using the asymptotic variance of the estimator. The loss in performance due to varying assumptions on the limited amounts of channel information at the sensors is quantified. With multiple antennas at the FC, a distributed detection problem is also considered, where the error exponent is used to evaluate performance. It is shown that for zero-mean channels between the sensors and the FC when there is no channel information at the sensors, arbitrarily large gains in the error exponent can be obtained with sufficient increase in the number of antennas at the FC. In stark contrast, when there is channel information at the sensors, the gain in error exponent due to having multiple antennas at the FC is shown to be no more than a factor of 8/π for Rayleigh fading channels between the sensors and the FC, independent of the number of antennas at the FC, or correlation among noise samples across sensors. In a second class of problems, sensor observations are transmitted to the FC using constant-modulus phase modulation over Gaussian multiple-access-channels. The phase modulation scheme allows for constant transmit power and estimation of moments other than the mean with a single transmission from the sensors. Estimators are developed for the mean, variance and signal-to-noise ratio (SNR) of the sensor observations. The performance of these estimators is studied for different distributions of the observations. It is proved that the estimator of the mean is asymptotically efficient if and only if the distribution of the sensor observations is Gaussian. / Dissertation/Thesis / Ph.D. Electrical Engineering 2010

abstract: This study compared a stimulus fading (SF) procedure with a constant time delay (CTD) procedure for identification of consonant-vowel-consonant (CVC) nonsense words for a participant with autism. An alternating treatments design was utilized through a computer-based format. Receptive identification of target words was evaluated using a computer format and the researcher conducted a generalization probe for expressive identification evaluation. Neither treatment condition resulted in consistent gains on the receptive identification measure. Both treatment conditions resulted in gains on the expressive identification assessment. The SF treatment condition was more efficient due to 1) accuracy in identifying all of the SF target words in fewer sessions than the CTD target words and 2) incidental learning that occurred as a result of exposure to additional SF words as distracter choices and in receptive identification assessments. Implications are discussed. / Dissertation/Thesis / Ph.D. Special Education 2011

[pt] Neste trabalho foi desenvolvido um estudo experimental do uso de técnicas de diversidade para combater o efeito de desvanecimento em sistemas de comunicação móveis celulares. Uma revisão da teoria mostrou os principais métodos de diversidade existentes e as técnicas usadas para combinar os diferentes sinais dos braços da diversidade e assim produzir um ganho em relação ao sinal desvanecido. Um laboratório móvel foi montado e uma extensiva campanha de medidas foi realizada numa região urbana da cidade do Rio de Janeiro. Devido às perspectivas de implementação dos sistemas de comunicação pessoal e da terceira geração dos sistemas celulares, neste trabalho usou-se freqüências na faixa de 900 e de 1800 MHz. Deste modo pode se estabelecer uma comparação entre os ganhos de diversidade nestas duas freqüências. Resultados de medidas de diversidade em espaço e em polarização na estação rádio base mostraram que estas técnicas são comparáveis em termos dos ganhos proporcionados. Uma contribuição importante deste trabalho foi na determinação dos efeitos do uso de diversidade combinada entre espaço e polarização. Neste caso, duas portas em polarização cruzada de duas antenas separadas espacialmente foram utilizadas. / [en] This work presentes an experimental study of diversity techniques used to combat the effect of channel fading on mobile cellular systems. A comlete theoretical review have shown the main existent diversity methods and the techniques used to combine the different branches of diversity used. A mobile laboratory was assembled and an extensive measurement campaign was carried out on an urban region of the Rio de Janeiro city. Due to the perspectives of personal communication and third generation cellular systems to be deployed, frequecies on the 900 MHz and 1800 MHz band were used on this work. Hence, a comparision between diversity gain on these frequencies was obtained. Results of space and polarization diversity have shown similar behavior in terms of gain. An important contribution of this work was on the effects of a combined space polarization diversity where the crosspolar ports of two spatially spaced antennae were considered.

xi, 111 p. ; ill. (some col.) A print copy of this title is available through the UO Libraries. Search the library catalog for the location and call number. / To address the growing academic and social needs of students, schools must utilize efficient and effective methods of behavior support. Targeted interventions support students who are at-risk for developing more severe problem behaviors. These interventions are implemented similarly across a group of students, and thus serve as an efficient and cost effective method of behavior support. Check in Check out (CICO) is a targeted group intervention that has a growing research base supporting its efficacy (Crone & Horner, 2003; Todd, Campbell, Meyer, & Horner, 2008). Although there is a growing research base, no studies have examined maintenance of reductions in problem behavior upon fading. The present study examines (1) if a functional relation exists between CICO and reductions in problem behavior, and (2) which components of CICO can be successfully faded with reductions in problem behavior maintaining. In addition, this study examines if teacher attention varies across phases of the study, and predicts successful fading procedures. A reversal design was used to evaluate the efficacy of CICO and subsequent fading phases in four elementary school aged boys. Results indicated that CICO was functionally related to reductions in classroom problem behavior in all four participants. In addition, a functional relation was established with CICO and increases in academic achievement in three participants. Fading procedures were mildly successful, with only some intervention components being removed with reductions in problem behavior maintaining. The amount of adult attention did not vary across study phases, however adult attention became less dependent on problem behavior during the CICO and first fading phase. Clinical and conceptual implications, as well as future research will be discussed. / Adviser: Cynthia Anderson

Made available in DSpace on 2014-06-11T19:29:01Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-02-23Bitstream added on 2014-06-13T18:35:24Z : No. of bitstreams: 1 luciano_es_me_bauru.pdf: 769426 bytes, checksum: ab8e48b2e61526d706765a3263da5d66 (MD5) / Vários estudos publicados (IWATTA et al., 2000; MYERS e HOLLAND, 2009; ALMEIDA, 2009; CERQUEIRA, 2009; TAVARES, 2009) demonstram a importância e a possibilidade do ensino de repertórios de análise de contingências para professores, a saber, de repertórios definidos pela execução de interpretações funcionais de interações em sala de aula. Este estudo teve por objetivo o ensino de tais repertórios compreendendo a identificação de respostas que definem queixas escolares, das condições antecedentes e de eventos subsequentes a tais respostas. Participaram deste estudo duas licenciadas em Pedagogia que atuavam como estagiárias no Ensino Fundamental e contratadas por uma Diretoria Municipal de Educação. Foram utilizados protocolos preenchidos por professores da rede municipal. Primeiramente, tais protocolos de alunos dos anos iniciais são encaminhados para o Serviço de Psicologia da referida Diretoria de Educação. O preenchimento foi efetuado antes da realização desta pesquisa, por professoras efetivas da rede municipal dos anos iniciais do Ensino Fundamental. A coleta de dados foi realizada em uma única sessão, na escola em quie as graduandas cumpriam período do estágio. Foram selecionados nove protocolos de encaminhamento para os quais foram construídos modelos de interpretação funcional mediante identificação da resposta (queixa) e dos possíveis eventos antecedentes e subsequentes a tais respostas para cada protocolo. Também foram elaborados dois questionários que indagavam sobre dimensões dos protocolos já preenchidos. o procedimento foi composto por quatro fases. Na fase 1 ocorreu a caracterização inicial de repertórios verbais das participantes na descrição dos Protocolos 1 e 2. Na fase 2, as participantes foram expostas aos modelos de interpretação funcional para os dois protocolos da fase anterior. na Fase 3 foi utilizado um procemento... / Many published essays IWATTA et al., 2000; MYERS e HOLLAND, 2009; ALMEIDA, 2009; CERQUEIRA, 2009; TAVARES, 2009) show the importance and possibilities on teaching contingency analyses repertoires to teachers, which is definite by doing functional interaction interpretations on classroom. This essays aimed to teach those repertoires with proposal identification on school complains about early conditions and subsequent responsible events. Two Education trainnes attended to it, they worked on Elementary school of an educational discrict Directory. It was used formularies, which was fulfilled by the teachers, about their students. First, those formularies were sent to Psychology center and their fulfilling was done by elementary school oficial teachers, before this research was made. This information was taken in one section at school in which trainees work. Nine formularies were selected, which were made functional interpretations, by identifying complain responses and their possible early and late events. Two questionnaires about the questions reach were also made. The procedures were formed by fours sections. The first one, was the initial identifying of participants' vocabulary repertoires to describe formularies 1 and 2. On the second stage, it was given the previous formularies to the participations. on the third stage, it was made a fading out procedure, in order to set grade describing patterns to formularies 3,4, 5 and 6. On fourth stage, a functional emergency words evaluation was made, about possible functional relationship with formularies 7,8 and 9. on the first stage, it was realized that participant analyzed teachers' answers on formularies in ana unexpected way from functional interpretation. The results of fourth stage, in which participants hit 81,26 and 78% in same order, suggest some relevant possible, instructions on procedures adopted on 2 and 3 stages... (Complete abstract click electronic access below)

abstract: This dissertation introduces stochastic ordering of instantaneous channel powers of fading channels as a general method to compare the performance of a communication system over two different channels, even when a closed-form expression for the metric may not be available. Such a comparison is with respect to a variety of performance metrics such as error rates, outage probability and ergodic capacity, which share common mathematical properties such as monotonicity, convexity or complete monotonicity. Complete monotonicity of a metric, such as the symbol error rate, in conjunction with the stochastic Laplace transform order between two fading channels implies the ordering of the two channels with respect to the metric. While it has been established previously that certain modulation schemes have convex symbol error rates, there is no study of the complete monotonicity of the same, which helps in establishing stronger channel ordering results. Toward this goal, the current research proves for the first time, that all 1-dimensional and 2-dimensional modulations have completely monotone symbol error rates. Furthermore, it is shown that the frequently used parametric fading distributions for modeling line of sight exhibit a monotonicity in the line of sight parameter with respect to the Laplace transform order. While the Laplace transform order can also be used to order fading distributions based on the ergodic capacity, there exist several distributions which are not Laplace transform ordered, although they have ordered ergodic capacities. To address this gap, a new stochastic order called the ergodic capacity order has been proposed herein, which can be used to compare channels based on the ergodic capacity. Using stochastic orders, average performance of systems involving multiple random variables are compared over two different channels. These systems include diversity combining schemes, relay networks, and signal detection over fading channels with non-Gaussian additive noise. This research also addresses the problem of unifying fading distributions. This unification is based on infinite divisibility, which subsumes almost all known fading distributions, and provides simplified expressions for performance metrics, in addition to enabling stochastic ordering. / Dissertation/Thesis / Ph.D. Electrical Engineering 2014

Submitted by Franciele Moreira (francielemoreyra@gmail.com) on 2018-01-31T13:43:51Z No. of bitstreams: 2 Dissertação - Juliana Damazio Carvalho - 2017.pdf: 10125141 bytes, checksum: ef6f7f1b5cc03bfa6d64f5c3ffca80ef (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2018-01-31T14:29:57Z (GMT) No. of bitstreams: 2 Dissertação - Juliana Damazio Carvalho - 2017.pdf: 10125141 bytes, checksum: ef6f7f1b5cc03bfa6d64f5c3ffca80ef (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2018-01-31T14:29:57Z (GMT). No. of bitstreams: 2 Dissertação - Juliana Damazio Carvalho - 2017.pdf: 10125141 bytes, checksum: ef6f7f1b5cc03bfa6d64f5c3ffca80ef (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2017-12-05 / The aim of this dissertation is based on the relation between the theme "death of man" and the emergence of Literature as a unique means of language in modernity. This relation is questioned by Michel Foucault in the book The Order of Things, in the terms of an incompatibility, in which the reappearance of the "self" of language that shines in our landscape from the emergence of literature is understood to threaten the sovereign status granted by the modern thoughts to the man-form. From this clipping, we intend to explain the terms of this incompatibility considering that, facing this new space of language, a heterotopic space that provokes the fading of the figure that until then was central to the ordering of modern knowledge, it provokes the fading of the main figure to the ordination of modern knowledge, opening up species of gaps in our thoughts that makes it possible to think differently. / O objetivo desta dissertação caminha em torno da relação entre o tema da ―morte do homem‖ e o aparecimento da literatura como modo singular da linguagem na modernidade, questão considerada por Michel Foucault em As palavras e as coisas sob os termos de uma incompatibilidade na qual o reaparecimento do ―ser‖ da linguagem, que cintila em nossa paisagem a partir do surgimento da literatura, é compreendido como uma ameaça ao estatuto soberano concedido pelo pensamento moderno à forma-homem. A partir deste recorte pretendemos explicitar os termos dessa incompatibilidade, considerando que face a esse novo espaço de linguagem, espaço heterotópico que suscita o desvanecimento da figura até então central à ordenação do saber moderno, abrem-se ao pensamento espécies de brechas, de espaços de abertura que nos possibilitam pensares outros.

Orientador: José Cândido Silveira Santos Filho / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação / Made available in DSpace on 2018-08-22T14:30:38Z (GMT). No. of bitstreams: 1 Nunes_AdailtonAntonioGaliza_M.pdf: 941738 bytes, checksum: 0240eca4ba132d2f778db9941bcfaeee (MD5) Previous issue date: 2013 / Resumo: O resumo poderá ser visualizado no texto completo da tese digital / Abstract: The abstract is available with the full electronic document / Mestrado / Telecomunicações e Telemática / Mestre em Engenharia Elétrica