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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
51

[en] TWO CLASSES OF PRACTICAL ARGUMENTS: THE PRACTICAL ARGUMENT STRUCTURE FROM THE VISION OF STEPHEN TOULMIN AND JOSEPH RAZ / [pt] DUAS CLASSES DE ARGUMENTOS PRÁTICOS: A ESTRUTURA DO ARGUMENTO PRÁTICO A PARTIR DA VISÃO DE STEPHEN TOULMIN E DE JOSEPH RAZ

RONALDO SOUZA DIAS 29 May 2013 (has links)
[pt] A distinção entre argumentar a partir de regra, e argumentar quando não há regra, é retomada para elucidar alguns aspectos da atividade justificatória no âmbito legal. A referida distinção encontrou em Rawls um porta-voz que realçou de modo incisivo sua importância para a prática legal. Antes dele, porém, Hume, Mill, Ryle e Toulmin, entre outros, já haviam tecido considerações relevantes ao tema. A distinção serve de motivação para dividir o campo da argumentação prática, particularmente da argumentação jurídica, em duas classes, a saber, argumentos de primeira e de segunda ordem. Nos argumentos de segunda ordem, uma regra atua na forma descrita no modelo de Toulmin. Nos argumentos de primeira ordem, caracterizados pela ausência de regra, procede-se mediante ponderação de razões, substanciadas em princípios gerais, valores morais, interesses políticos, programas econômicos, considerações religiosas e pretensões corporativas. Alguns exemplos ilustram a distinção. Argumenta-se que a base lógica dessa distinção assenta-se no conceito de regra como razão excludente, no sentido estabelecido por Joseph Raz. / [en] The distinction between justify a conclusion from rule and justify it when no rule is resumed to elucidate some aspects of legal activity. This distinction found in Rawls a spokesman that incisively pointed out its importance for the legal practice. Before him, however, Hume (A Treatise of Human Nature), Mill (A System of Logic), Ryle (The Concept of Mind) and Toulmin (The Uses of Argument), among others, had already made relevant considerations to the topic. The distinction serves as motivation to split the field of argumentation practice, particularly of the legal argument, into two classes, namely, arguments of first and second order. In the arguments of second order, a rule operates in the manner described in the Toulmin model, in the arguments of the first order, characterized by the absence of rule, by weighting of reasons, substantiated on general principles, moral values, political interests, religious considerations and corporate claims. Some examples illustrate the distinction. It is argued that the logical basis of this distinction is based on the concept of rule as exclusionary reason, within the meaning established by Joseph Raz.
52

Public reason, political behavior, and the determinants of informal political deliberation in Brazil

Tomkowski, Felipe Goulart 30 March 2017 (has links)
Submitted by Caroline Xavier (caroline.xavier@pucrs.br) on 2017-07-03T13:27:49Z No. of bitstreams: 1 DIS_FELIPE_GOULART_TOMKOWSKI_COMPLETO.pdf: 661319 bytes, checksum: 652d7011baedb676606b1b58f3f86c31 (MD5) / Made available in DSpace on 2017-07-03T13:27:49Z (GMT). No. of bitstreams: 1 DIS_FELIPE_GOULART_TOMKOWSKI_COMPLETO.pdf: 661319 bytes, checksum: 652d7011baedb676606b1b58f3f86c31 (MD5) Previous issue date: 2017-03-30 / A presente disserta??o tem por objetivo investigar o valor instrumental do comportamento humano para o funcionamento da democracia atrav?s da ideia de raz?o p?blica. A intera??o que existe entre governo e cidad?os ? determinante para que as pol?ticas p?blicas de um pa?s sejam condizentes com as prefer?ncias da popula??o e n?o de grupos de poder. Sendo assim, torna-se importante analisar a ideia subjacente ? democracia de "governo pela discuss?o" ? luz de teorias que nos iluminem tanto no que diz respeito ? ideia de decis?o coletiva justa, quanto, ao real comportamento humano. Para tal, primeiramente ? apresentada a ideia de raz?o p?blica a contraponto, em particular, as vis?es de Rawls e Sen, dando ?nfase para ao conceito de imparcialidade nas decis?es pol?ticas. Em seguida, na terceira se??o, trabalham-se as ideais de racionalidade, razoabilidade, introduzindo-se os conceitos de heur?sticas, vieses, e valores sociais. Assim, constr?i-se uma associa??o para se pensar sobre os resultados de diferentes tipos de comportamento humano para a democracia e como ? poss?vel refletir a partir dele sobre as ideias de objetividade posicional e transcendental. Finalmente, na se??o IV, realiza-se uma investiga??o emp?rica atrav?s da base de sobre a rela??o entre percep??es sobre informa??es e disposi??es pol?ticas e a frequ?ncia de conversa sobre pol?tica com os amigos. Utiliza-se um modelo de regress?o log?stica ordenada, com dados do Latino Bar?metro de 2015 para o Brasil, aliado ao m?todo de componentes principais para capturar dimens?es explicativas relevantes. Os seguintes resultados obtidos contradizem as hip?teses pr?vias: a falta de confian?a no governo e a percep??o de garantias faltantes n?o significativos, o ativismo dissociado a causas espec?ficas reduz, ao passo que, um senso de cidadania ao reverso aumenta as chances de se conversar sobre pol?tica com mais frequ?ncia com amigos. / The present dissertation aims to investigate the instrumental role of human behaviour for democracy through the idea of public reason. The interaction between government and citizens is decisive for a country's public policies to be in line with population preferences rather than power groups. Thus, it becomes important to analyse the idea underlying democracy of "government by discussion" in the light of theories that enlighten us both with regard to the idea of just collective decision and real human behaviour. To this end, we first counterpoint the idea of public reason, in particular, of Rawls and Sen, with an emphasis on the concept of impartiality in political decisions. Then, in the third section, we work on the notions of rationality, reasonableness, introducing the concepts of heuristics, biases, and social values. Thus, an association is constructed for thinking about the results of different types of human behavior for democracy and how the ideas of positional and transcendental objectivity fit this purpose well. Finally, in section IV, we conduct an empirical investigation based on the relationship between perceptions of relevant political information and dispositions and the frequency of political talk with friends. We use a logistic regression model, with data from the 2015 Latin Barometer for Brazil, combined with principal components method to capture relevant explanatory dimensions. The following results contradict previous hypotheses: lack of trust in the government and the perception of absent guarantees are not significant, while activism dissociated of specific causes reduces and a reverse sense of citizenship increases the chances of talking about politics more frequently with friends.
53

Hidrocarbonetos polic?clicos arom?ticos em sedimentos de fundo do estu?rio do rio Potengi, regi?o da grande Natal (RN): implica??es ambientais

Queiroz, Maria Sara Maia de 07 February 2011 (has links)
Made available in DSpace on 2014-12-17T14:08:43Z (GMT). No. of bitstreams: 1 MariaSMQ_DISSERT_1-36.pdf: 5283210 bytes, checksum: e75f1aa1d6f8e40607338226667f1b0d (MD5) Previous issue date: 2011-02-07 / Estuaries are environments prone to the input of chemical pollutants of various kinds and origins, including polycyclic aromatic hydrocarbons (PAHs). Anthropogenic PAHs may have two possible sources: pyrolytic (with four or more aromatic rings and low degree of alkylation) and petrogenic (with two and three aromatic rings and high degree of alkylation). This study aimed to evaluate the levels, distribution and possible sources of polycyclic aromatic hydrocarbons in the estuary of the Potengi river, Natal, Brazil. Samples of bottom sediments were collected in the final 12 km of the estuary until its mouth to the sea, where the urbanization of the Great Natal is more concentrated. Sampling was performed on 12 cross sections, with three stations each, totaling 36 samples, identified as T1 to T36. The non alkylated and alkylated PAHs were analyzed by gas chromatography coupled to mass spectrometry (GC / MS). PAHs were detected in all 36 stations with total concentration on each varying 174-109407 ng g-1. These values are comparable to those of several estuarine regions worldwide with high anthropogenic influence, suggesting the record of diffuse contamination installed in the estuary. PAHs profiles were similar for most stations. In 32 of the 36 stations, low molecular weight PAHs (with 2 and 3 ring: naphthalene, phenanthrene and their alkylated homologues) prevailed, which ranged from 54% to 100% of the total PAH, indicating that leaks, spills and combustion fuels are the dominant source of PAH pollution in the estuary. The level of contamination by PAHs in most stations suggests that there is potential risk of occasional adverse biological effects, but in some stations adverse impacts on the biota may occur frequently. The diagnostic ratios could differentiate sources of PAHs in sediments of the estuary, which were divided into three groups: petrogenic, pyrolytic and mixing of sources. The urban concentration of the Great Natal and the various industrial activities associated with it can be blamed as potential sources of PAHs in bottom sediments of the estuary studied. The data presented highlight the need to control the causes of existing pollution in the estuary / Os estu?rios s?o ambientes prop?cios ao aporte de poluentes qu?micos de diversas naturezas e origens, incluindo Hidrocarbonetos Polic?clicos Arom?ticos (HPA). Os HPA antr?picos s?o de duas fontes poss?veis: pirol?tica (com quatro ou mais an?is arom?ticos e baixo grau de alquila??o) e petrog?nica (com dois e tr?s an?is arom?ticos e alto grau de alquila??o). O presente trabalho teve como objetivo avaliar os n?veis, distribui??o e poss?veis fontes de Hidrocarbonetos Polic?clicos Arom?ticos no estu?rio do rio Potengi, Natal-RN. Amostras de sedimentos de fundo foram coletadas nos 12 km finais do estu?rio at? a sua foz, onde a urbaniza??o da Grande Natal ? mais concentrada. A amostragem foi realizada em 12 se??es transversais, com tr?s esta??es em cada uma, totalizando 36 amostras, identificadas de T1 a T36. Os HPA alquilados e n?o alquilados foram analisados por cromatografia gasosa acoplada a um detector seletivo de massas (CG/EM). Foram detectados HPA em todas as 36 esta??es, com concentra??o total em cada uma variando de 174 a 109407 ng g-1. Esses valores s?o compar?veis aos de v?rias regi?es estuarinas mundiais com grande influ?ncia antr?pica, o que sugere o registro de contamina??es difusas instaladas no estu?rio. O perfil de HPA foi similar para a maioria das esta??es. Em 32 das 36 esta??es predominaram HPA de baixo peso molecular (com 2 e 3 an?is: naftaleno, fenantreno e seus hom?logos alquilados), que variaram de 54% a 100% em rela??o ao total de HPA, indicando que vazamentos, derramamentos e queima de combust?veis s?o a fonte dominante de polui??o por HPA no estu?rio. O n?vel de contamina??o por HPA na maioria das esta??es sugere que h? risco potencial de ocasionais efeitos biol?gicos adversos serem observados, por?m em algumas esta??es se confirmam que impactos adversos sobre a biota ocorrem com freq??ncia. As raz?es diagn?sticas permitiram diferenciar as fontes de HPA nos sedimentos do estu?rio, que foram divididos em tr?s grupos: sedimentos com padr?es de introdu??o de hidrocarbonetos petrog?nicos, pirol?ticos e de mistura de fontes. A concentra??o urbana da Grande Natal e as atividades industriais diversas a ela associadas podem ser responsabilizadas como fontes potenciais dos HPA nos sedimentos de fundo do estu?rio estudado. Os dados apresentados evidenciam a necessidade de se controlar as causas da polui??o existente no estu?rio
54

Testes em modelos weibull na forma estendida de Marshall-Olkin

Magalh?es, Felipe Henrique Alves 28 December 2011 (has links)
Made available in DSpace on 2015-03-03T15:28:32Z (GMT). No. of bitstreams: 1 FelipeHAM_DISSERT.pdf: 2307848 bytes, checksum: c94e3d62e5fe54424d6cbe1491c8d85d (MD5) Previous issue date: 2011-12-28 / Universidade Federal do Rio Grande do Norte / In survival analysis, the response is usually the time until the occurrence of an event of interest, called failure time. The main characteristic of survival data is the presence of censoring which is a partial observation of response. Associated with this information, some models occupy an important position by properly fit several practical situations, among which we can mention the Weibull model. Marshall-Olkin extended form distributions other a basic generalization that enables greater exibility in adjusting lifetime data. This paper presents a simulation study that compares the gradient test and the likelihood ratio test using the Marshall-Olkin extended form Weibull distribution. As a result, there is only a small advantage for the likelihood ratio test / Em an?lise de sobreviv?ncia, a vari?vel resposta e, geralmente, o tempo at? a ocorr?ncia de um evento de interesse, denominado tempo de falha, e a principal caracter?stica de dados de sobreviv?ncia e a presen?a de censura, que ? a observa??o parcial da resposta. Associados a essas informa??es, alguns modelos ocupam uma posi??o de destaque por sua comprovada adequa??o a v?rias situa??es pr?ticas, entre os quais ? poss?vel citar o modelo Weibull. Distribui??es na forma estendida de Marshall-Olkin oferecem uma generaliza??o de distribui??es b?sicas que permitem uma flexibilidade maior no ajuste de dados de tempo de vida. Este trabalho apresenta um estudo de simula??o que compara duas estat?sticas de teste, a da Raz?o de Verossimilhan?as e a Gradiente, utilizando a distribui??o Weibull em sua forma estendida de Marshall-Olkin. Como resultado, verifica-se apenas uma pequena vantagem para estat?stica da Raz?o de Verossimilhancas
55

A est?tica transcendental kantiana ? luz de Strawson

Nobre, Jos? Mariano 19 November 2008 (has links)
Made available in DSpace on 2014-12-17T15:12:09Z (GMT). No. of bitstreams: 1 JoseMN.pdf: 393628 bytes, checksum: 681edfa16c6d45e95595bec0b691cfc6 (MD5) Previous issue date: 2008-11-19 / This work s objective is to make a literal interpretation of Kant s Aesthetic transcendental, the first pilaster of sustentation of the epistemology of Kant and to interpret it at Strawson s light. It contains the doctrine of sensitivity responsible for the intuitions, which rests on the concepts of space and time, and, with this, the tematiza??o of two important questions. For Kant s philosophy in its epistemologic source what s the importance of the concepts of and time? How these concepts of space and time inscribe themselves with such statute as an investigatory task of metaphysics? The specification of the concepts of space and time as ingredients of the theories treated and enrolled in this work are segmented of the Aesthetic transcendental of Kant, and interpreted under Strawson s light. The research is divided in two chapter; first, constituted of two parts, the first part presents an introduction to the Aesthetic transcendental of Kant, to show the doctrine of the sensitivity which is part of with its forms space and time, authentic forms of the intuition. The second chapter, is constituted of four parts, that deal with the interpretation of the austere model of Strawson and related with Kant s transcendental Aesthetic. The conclusion of our work, about the declared objection of Strawson in its austere interpretation that refuses the idea of space and time, even keeping its a priori character, cannot be accepted. The apriority, the intuitivity and the ideality are theories non-separable in a coherent boarding of space and time of Kant s model of epistemology / Este trabalho tem por objetivo fazer uma interpreta??o textual da est?tica transcendental kantiana, a primeira pilastra de sustenta??o da epistemologia de Kant e interpret?-la ? luz de Strawson. Ela cont?m a doutrina da sensibilidade respons?vel pelas intui??es, que repousam sobre os conceitos de espa?o e tempo e, com isso, a tematiza??o de duas importantes quest?es. Para a filosofia kantiana em sua vertente epistemol?gica, qual a import?ncia dos conceitos de espa?o e tempo? Como esses conceitos de espa?o e tempo se inscrevem com tal estatuto como uma tarefa investigat?ria da metaf?sica? Os conceitos de espa?o e tempo, especificados como ingredientes das teses tratadas e arroladas nesta disserta??o, s?o no??es relevantes da est?tica transcendental de Kant, aqui interpretados ? luz de Strawson. A pesquisa est? dividida em dois cap?tulo. O primeiro cap?tulo, que consta de duas partes, ap?s fazer uma introdu??o ? est?tica transcendental de Kant, exp?e a doutrina da sensibilidade de que fazem parte espa?o e tempo, formas aut?nticas da intui??o. O segundo cap?tulo, constitu?do de cinco partes, trata da interpreta??o do modelo austero de Strawson relacionado com a est?tica transcendental de Kant. A conclus?o do nosso trabalho ? a de que, no que pese a declarada obje??o de Strawson em sua interpreta??o austera, que recusa a idealidade do espa?o e do tempo, mesmo mantendo o seu car?ter a priori, n?o pode ser aceita A aprioridade, a intuitividade e a idealidade s?o teses insepar?veis numa abordagem coerente do espa?o e do tempo do modelo de epistemologia kantiana
56

An?lise em conjunta de testes cosmol?gicos

Gimenes, Humberto Scalco 01 April 2013 (has links)
Made available in DSpace on 2014-12-17T15:15:02Z (GMT). No. of bitstreams: 1 HumbertoSG_DISSERT.pdf: 1623099 bytes, checksum: 9db2624a800c722b68b561bc7a9bc747 (MD5) Previous issue date: 2013-04-01 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / Nesta disserta??o, uma revis?o sobre tr?s modelos cosmol?gicos n?o-padr?o do tipo Friedmann-Robertson-Walker s?o apresentados. O modelo !CDM, o g?s de Chaplygin generalizado e o modelo de brana de Dvali-Gabadadze-Porrati (DGP). Apresentamos tamb?m, tr?s testes estat?sticos utilizados em Cosmologia, cada um envolvendo uma vela padr?o diferente. Estes testes t?m como objetivo, vincular os diferentes par?metros de cada modelo e assim compar?-los com os dados observacionais mais atuais. Efetuamos o teste do m?dulo de dist?ncia de Supernovas do tipo Ia, atrav?s de 580 Supernovas do Union Compilation 2.1 (2011) [1]. A Fra??o de massa de aglomerados de gal?xias, onde utilizamos um conjunto de 52 aglomerados observados pelo CHANDRA (2009) [2] e a raz?o CMB/BAO, onde foram utilizados um conjunto de 6 picos de BAO do WiggleZ Dark Energy Survey (2011) [3]. Esses testes foram aplicados para cada um dos modelos apresentados. Verificamos que individualmente, os testes cosmol?gicos n?o s?o bons o suficiente para vincular modelos, criando espa?os param?tricos degenerados, necessitando de uma an?lise em conjunta dos testes para vincular os par?metros. OBS: N?o foi poss?vel efetuar a descri??o integral do resumo, devido o fato do sistema utilizado n?o aceitar os s?mbolos existentes. Desse modo, solicitamos que a visualiza??o desse elemento seja efetuada no arquivo da disserta??o.
57

Hidrocarbonetos polic?clicos arom?ticos no meio ambiente: diferencia??o de fontes em sedimentos e metab?litos em bile de peixes

Meniconi, Maria de F?tima Guadalupe 30 March 2007 (has links)
Made available in DSpace on 2014-12-17T15:42:31Z (GMT). No. of bitstreams: 1 MariaFGM.pdf: 2684798 bytes, checksum: 4d672e17bab00bdd5d88eb70b9c57edf (MD5) Previous issue date: 2007-03-30 / Petr?leo Brasileiro SA - PETROBRAS / Many studies on environmental ecosystems quality related to polycyclic aromatic hydrocarbons (PAH) have been carried out routinely due to their ubiquotus presence worldwide and to their potential toxicity after its biotransformation. PAH may be introduced into the environmet by natural and anthropogenic processes from direct runoff and discharges and indirect atmospheric deposition. Sources of naturally occurring PAHs include natural fires, natural oil seepage and recent biological or diagenetic processes. Anthropogenic sources of PAHs, acute or chronic, are combustion of organic matter (petroleum, coal, wood), waste and releases/spills of petroleum and derivatives (river runoff, sewage outfalls, maritime transport, pipelines). Besides the co-existence of multiples sources of PAH in the environmental samples, these compounds are subject to many processes that lead to geochemical fates (physical-chemical transformation, biodegradation and photo-oxidation), which leads to an alteration of their composition. All these facts make the identification of the hydrocarbons sources, if petrogenic, pyrolytic or natural, a challenge. One of the objectives of this study is to establish tools to identify the origin of hydrocarbons in environmental samples. PAH diagnostic ratios and PAH principal component analysis were tested on a critical area: Guanabara Bay sediments. Guanabara Bay is located in a complex urban area of Rio de Janeiro with a high anthropogenic influence, being an endpoint of chronic pollution from the Greater Rio and it was the scenario of an acute event of oil release in January 2000. It were quantified 38 compounds, parental and alkylated PAH, in 21 sediment samples collected in two surveys: 2000 and 2003. The PAH levels varied from 400 to 58439 ng g-1. Both tested techniques for origin identification of hydrocarbons have shown their applicability, being able to discriminate the PAH sources for the majority of the samples analysed. The bay sediments were separated into two big clusters: sediments with a clear pattern of petrogenic introduction of hydrocarbons (from intertidal area) and sediments with combustion characteristics (from subtidal region). Only a minority of the samples could not display a clear contribution of petrogenic or pyrolytic input. The diagnostic ratios that have exhibited high ability to distinguish combustion- and petroleum-derived PAH inputs for Guanabara Bay sediments were Phenanthrene+Anthracene/(Phenanthrene+Anthracene+C1Phenanthrene); Fluorantene/(Fluorantene+Pyrene); Σ (other 3-6 ring PAHs)/ Σ (5 alkylated PAH series). The PCA results prooved to be a useful tool for PAH source identification in the environment, corroborating the diagnostic indexes. In relation to the temporal evaluation carried out in this study, it was not verified significant changes on the class of predominant source of the samples. This result indicates that the hydrocarbons present in the Guanabara Bay sediments are mainly related to the long-term anthropogenic input and not directly related to acute events such as the oil spill of January 2000. This findings were similar to various international estuarine sites. Finally, this work had a complementary objective of evaluating the level of hydrocarbons exposure of the aquatic organisms of Guanabara Bay. It was a preliminary study in which a quantification of 12 individual biliar metabolites of PAH was performed in four demersal fish representing three different families. The analysed metabolites were 1-hydroxynaphtalene, 2-hidroxinaphtalene, 1hydroxyphenanthrene, 9-hydroxyphenanthrene, 2-hydroxyphenanthrene, 1hydroxypyrene, 3-hidroxibiphenil, 3- hydroxyphenanthrene, 1-hydroxychrysene, 9hydroxyfluorene, 4-hydroxyphenanthrene, 3-hydroxybenz(a)pyrene. The metabolites concentrations were found to be high, ranging from 13 to 177 ?g g-1, however they were similar to worldwide regions under high anthropogenic input. Besides the metabolites established by the used protocol, it was possible to verified high concentrations of three other compounds not yet reported in the literature. They were related to pyrolytic PAH contribution to Guanabara Bay aquatic biota: 1-hydroxypyrine and 3-hydroxybenz(a)pyrine isomers / In?meros estudos da qualidade de ecossistemas naturais em rela??o a contamina??o de hidrocarbonetos polic?ciclos arom?ticos (HPA) t?m sido desenvolvidos continuadamente face a sua presen?a ub?quoa em todo o planeta e ao seu potencial t?xico ap?s a biotransforma??o. A introdu??o dos HPA no meio ambiente pode ocorrer atrav?s de processos naturais e antropog?nicos, atrav?s de despejos e/ou drenagens e deposi??o atmosf?rica indireta. Fontes naturais de HPA incluem queimadas naturais, exsuda??es de ?leo e processos biog?nicos recentes. Fontes antropog?nicas de HPA, advindas de eventos cr?nicos ou agudos, s?o a combust?o incompleta de ?leo combust?vel automotivo e industrial, a queima intencional de madeira e planta??es, os despejos dom?sticos e industriais, as drenagens pluviais urbanas, os efluentes da ind?stria petrol?fera, os derrames acidentais de ?leo e derivados. Al?m da coexist?ncia de m?ltiplas fontes destes hidrocarbonetos nas amostras ambientais, os HPA est?o sujeitos a v?rios processos geoqu?micos que conduzem ? altera??o de sua composi??o qu?mica ao longo do tempo, tornando a identifica??o das fontes contaminantes, se petrog?nica, pirol?tica ou natural, um verdadeiro desafio. Desta forma, um dos objetivos deste estudo foi estabelecer ferramentas que possibilitem a determina??o das fontes de hidrocarbonetos no meio ambiente. Foram utilizadas raz?es diagn?sticas e an?lise de componentes principais de HPA, tendo sido quantificados 38 compostos, incluindo os HPA parentais e alquilados, em 21 amostras de sedimento da Ba?a de Guanabara, coletadas nos anos de 2000 e 2003. A Ba?a de Guanabara ? um ecossistema estuarino com elevada influ?ncia antropog?nica, que recebe polui??o cr?nica da regi?o metropolitana do Rio de Janeiro e que foi cen?rio de um derrame de ?leo em janeiro de 2000. As concentra??es de HPA nos sedimentos estudados apresentaram-se na faixa de 400 a 58439 ng g-1. Ambas as t?cnicas de diferencia??o de fontes de HPA testadas, raz?es diagn?sticas e an?lise de componentes principais, demonstraram sua aplicabilidade, permitindo a diferencia??o das fontes de HPA para a maioria dos sedimentos da ba?a, que foram divididos em dois grandes grupos: sedimentos com padr?es de introdu??o de hidrocarbonetos predominantemente petrog?nicos e sedimentos com caracter?sticas de combust?o. Apenas uma minoria de amostras n?o apresentou com nitidez a natureza de sua contamina??o. As raz?es que apresentaram maior capacidade em diferenciar as fontes de HPA foram Fluoranteno / (Fluoranteno + Pireno), (Fenantreno + Antraceno) / (Fenantreno + Antraceno + C1Fenantreno) e o ?ndice pirol?tico, Σ (HPA parentais de 3-6 an?is) /Σ (5 s?ries de HPA alquilados). Na avalia??o temporal realizada neste estudo n?o foram verificadas varia??es significativas na natureza das fontes contaminantes predominantes na ba?a, revelando que os hidrocarbonetos presentes est?o correlacionados principalmente com os aportes cr?nicos e n?o diretamente com eventos agudos como o derrame de ?leo ocorrido em janeiro de 2000. Este estudo teve como segundo objetivo a avalia??o preliminar do n?vel de exposi??o a que os organismos aqu?ticos da Ba?a de Guanabara est?o submetidos, atrav?s da quantifica??o de 12 metab?litos individuais de HPA presentes em bile de peixe de quatro esp?cies demersais representativas de tr?s fam?lias diferentes. Os metab?litos analisados foram 1-hidroxinaftaleno, 1-hidroxifenantreno, 9hidroxifenantreno, 2-hidroxinaftaleno, 2-hidroxifenantreno, 1-hidroxipireno, 3hidroxibifenila, 3-hidroxifenantreno, 1-hidroxicriseno, 9-hidroxifluoreno, 4hidroxifenantreno, 3-hidroxibenzo(a)pireno. As concentra??es encontradas nas esp?cies de peixes analisadas mostraram-se elevadas, na faixa de 13 a 177 ?g g1, por?m similares ?s encontradas em algumas regi?es de grande influ?ncia antropog?nica, tanto no Brasil quanto no exterior. Al?m dos metab?litos estabelecidos pela metodologia utilizada, foi poss?vel quantificar tr?s compostos, ainda n?o reportados na literatura, em concentra??es relevantes. Estes metab?litos, relacionados a contribui??o pirol?tica de HPA aos organismos aqu?ticos da Ba?a de Guanabara, s?o is?meros de 1-hidroxipireno e de 3-hidroxibenzo(a)pireno
58

Tramas da (ir)racionalidade contempor?nea para a composi??o do mito-tecno-l?gico

Pires, Jo?o Maria 06 August 2004 (has links)
Made available in DSpace on 2014-12-17T14:35:45Z (GMT). No. of bitstreams: 1 JoaoMP.pdf: 572426 bytes, checksum: 3eb2abb81c860d59d686cd34cb63726a (MD5) Previous issue date: 2004-08-06 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The plot myth-techno-logic, contemporary, was developed starting from the dualism myth-reason. In this study, we deepened the alluded dualism taking as reference the historical contexts of the Renaissance and of the Enlightenment, emphasizing the discussion of the economical rationalization as conductive thread of the western development, in which we identified the game of the rational and of the irrational, for assure the superiority of the reason. In the context of that game, we analyzed the implications of the modernization, for the education, in function of the instrumental rationality, responsible for the environment of adaptation of the technological instruments to the scenery of the contemporary modernization. The new context is constituted by points of union and of ruptures among the technique, the science and the myth. Through our analysis, we noticed that the basic needs for the contemporary society were linked to the changes in the production means, for which the machine determine the rhythm of the work and the quality of the product. However, the changes in the productive processes promoted the appearance of the commercial marks that, as we see it, they represented the synthesis of the perfect harmony of the myth, of the technique, of the science and of the technology, in the conduction of the economical rationalization to the contemporary modernization. Thus, the contemporary modernization it arrives us for the economical rationalization, developed with the support of the technician-scientific knowledge and communicated by the articulations of the myth-techno-logical / A trama mito-tecno-l?gica, contempor?nea, foi desenvolvida a partir da dicotomia mito-raz?o. Neste estudo, aprofundamos a referida dicotomia tomando como refer?ncia os contextos hist?ricos do Renascimento e do Iluminismo, ressaltando a discuss?o da racionaliza??o econ?mica como fio condutor do desenvolvimento ocidental, no qual identificamos o jogo do racional e do irracional, para assegurar a superioridade da raz?o. No contexto desse jogo, analisamos as implica??es da moderniza??o, para a educa??o, em fun??o da racionalidade instrumental, respons?vel pelo ambiente de adequa??o dos instrumentos tecnol?gicos ao cen?rio da moderniza??o contempor?nea. O novo contexto ? constitu?do por pontos de intersec??o e ruptura entre a t?cnica, a ci?ncia e o mito. Atrav?s da nossa an?lise, percebemos que as necessidades b?sicas para o conjunto da contemporaneidade encontravam-se vinculadas ?s mudan?as nas formas de produ??o, para o qual a m?quina passou a determinar o ritmo do trabalho e a qualidade do produto. Por sua vez, as mudan?as nos processos produtivos promoveram o surgimento das marcas comerciais que, no nosso modo de ver, representaram a s?ntese da perfeita harmonia do mito, da t?cnica, da ci?ncia e da tecnologia, na condu??o da racionaliza??o econ?mica at? ? moderniza??o contempor?nea. Desse modo, a moderniza??o contempor?nea nos chega pela racionaliza??o econ?mica, desenvolvida com o respaldo dos conhecimentos t?cnico-cient?ficos, e comunicada pelas articula??es do mito-tecno-l?gico
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Automatická detekce infarktu myokardu v signálu EKG / Automatic detection of myocardial infarction in ECG

Nejedlý, Lukáš January 2018 (has links)
This master’s thesis deals with the automatic detection of myocardial infarction in ECG. Semester work consists of two parts. The theoretical part provides a description of the electrical conduction system of the heart, spreading of electrical activity through the heart muscle, the methods of ECG scanning and the ECG curve. There are also mentioned the causes of myocardial ischemia and various methods of its detection. Another part is devoted to high-frequency ECG, analysis of HFQRS and clinical studies which describe the use of high-frequency ECG in diagnosis of myocardial infarction. In the practical part is proposed an algorithm using low-frequency components ECG and an algorithm using high-frequency components ECG for automatic detection of myocardial infarction. The proposed algorithms are implemented in programming environment MATLAB and tested on signals from the PTB database. The final part of the master‘s thesis is devoted to the comparison of the success of myocardial infarction by means of low frequency and high frequency components of ECG and comparison of achieved results with results from clinical studies.
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Identidad del orden jurídico y régimen político

Vilajosana Rubio, Josep M. (Josep Maria) 20 December 1993 (has links)
A la primera part, l'autor tracta de demostrar que certs criteris formals d'identitat d'un ordre jurídic (com els defensats per Austin, Kelsen y Hart) no resulten satisfactoris, perquè ignoren la repercussió que sobre aquesta qüestió té la connexió entre el dret i la política. La solució passa, aleshores, per trobar un criteri material d'identitat dels ordres jurídics. A la segona part es proposa que aquesta identitat es defineixi en termes d'identitat dels règims polítics. Això permet emprar l'instrumental analític de la teoria política (des de Easton a Morlino). La conclusió: dins d'un cert ordre estatal, un ordre jurídic manté la seva identitat fins que el règim polític segueixi sent el mateix. Al seu torn, un règim polític manté la seva identitat fins que els seus elements són modificats de tal manera que ens porten a haver de incloure'l en una categoria diferent, dins d'una determinada classificació. / En la primera parte, el autor pretende demostrar que ciertos criterios formales de identidad de un orden jurídico (como los defendidos por Austin, Kelsen y Hart) no resultan satisfactorios, dado que ignoran la repercusión que sobre esta cuestión tiene la conexión entre el derecho y la política. La solución pasa por delinear un criterio material de identidad de los órdenes jurídicos en términos de identidad de los regímenes políticos, como se hace en la segunda parte. Ello permite usar el instrumental analítico de la teoría política (desde Easton hasta Morlino). La conclusión: dentro de cierto orden estatal, un orden jurídico mantiene su identidad hasta que el régimen político sigue siendo el mismo. A su vez, un régimen político mantiene su identidad hasta que sus elementos se modifican de tal manera que nos llevan a clasificarlo en otra categoría en el seno de una clasificación dada. / In the first part, the author attempts to demonstrate that certain formal criteria of identity of a legal order (the Austin's, Kelsen's and Hart's criteria) are not satisfactory, because they ignore the repercussions of the link between law and politics. The solution can only be found in trying to delineate a material criterion for the identity of legal orders. In the second part, the author defines the identity of legal orders in terms of the identity of political regimes. In this way, he can make use of the analytical tools devised of political theory (from Easton to Morlino). The conclusion: within a certain State order, a legal order maintains its identity as long as the political regime stays the same. The political regime, in turn, maintains its identity until its elements are modified in a way that forces us to attribute it to another category, within a given classification.

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