Made available in DSpace on 2015-04-14T13:22:26Z (GMT). No. of bitstreams: 1 389650.pdf: 177802 bytes, checksum: cbac0e15393045bfaa9a3ef3bb829817 (MD5) Previous issue date: 2007-03-08 / N?o possui resumo

Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2017-08-18T14:34:19Z No. of bitstreams: 1 2010 - Joana Farias dos Santos.pdf: 22299426 bytes, checksum: 81d0ca2bff111fd3e0327131ba752062 (MD5) / Made available in DSpace on 2017-08-18T14:34:19Z (GMT). No. of bitstreams: 1 2010 - Joana Farias dos Santos.pdf: 22299426 bytes, checksum: 81d0ca2bff111fd3e0327131ba752062 (MD5) Previous issue date: 2010-12-22 / Programa de Capacita??o da Universidade do Estado da Bahia, PAC - UNEB, Brasil. / Reclaimed areas constitute ecosystems where soil and part of subsoil were suppressed. They show minimal resilience levels and need antropogenic interference for rehabilitation in the regional context. In this study it was evaluated 5 reforestations with different species and functional properties (treatments) after a lapse of 13-years. In chapter 1 it was evaluated the development, horizontal structure and floristic composition of shrubby-arboreal stratum. In chapter 2 understory spontaneous regeneration and in chapter 3 similarity of floristic composition between rehabilitation and a spontaneous restored area (~ 40 years old) were determined. At reforestation sites with five different groups of species, floristic composition increased from 12 to 23 species, distributed on 12 families and 276 individuals, where Fabaceae was the major family. For spontaneous regeneration 3.554 individuals were surveyed (1.438 on winter and 2.116 at summer) and the most representative families were Asteraceae and Poaceae. At the restoration site, it was observed 967 individuals from spontaneous regeneration, and the most representative families were Asteraceae and Sapindaceae, showing that there is low similarity between rehabilitation and restoration environments. All treatments displayed advances in the environmental sustainability, but two combinations of species had different performances in the rehabilitation of the reclaimed areas. / ?reas de empr?stimo constituem ecossistemas onde o solo e partes do subsolo foram suprimidas. Elas apresentam n?veis m?nimos de resili?ncia, necessitando de interven??es antr?picas para sua reabilita??o ao contexto regional. Neste estudo se avaliaram 5 reflorestamentos com esp?cies e propriedades funcionais diferentes (tratamentos), seus desempenhos e sustentabilidade ambiental depois de transcorridos 13 anos. No Cap?tulo I foram avaliados o desenvolvimento, a estrutura horizontal e a composi??o flor?stica do estrato arb?reo-arbustivo. No Cap?tulo II, a regenera??o espont?nea nos sub-bosques e no Cap?tulo III, a similaridade entre composi??es flor?sticas de ?reas em reabilita??o e em restaura??o espont?nea, com aproximadamente 40 anos. Nos reflorestamentos com 5 diferentes conjuntos de esp?cies, a composi??o flor?stica aumentou de 12 para 23 esp?cies, distribu?das em 12 fam?lias e 276 indiv?duos, sendo a Fabaceae a principal fam?lia. Foram encontrados 3.554 indiv?duos regenerantes (1.438 no inverno e 2.116 no ver?o) e as fam?lias bot?nicas mais representativas foram Asteraceae e Poaceae. Na ?rea em restaura??o, foram observados 967 indiv?duos regenerantes e as fam?lias Asteraceae e Sapindaceae tiveram maior representa??o, evidenciando que h? pequena similaridade entre esp?cies de ambientes em reabilita??o e restaura??o. Todos os tratamentos demonstraram avan?os na sustentabilidade ambiental, por?m duas combina??es de esp?cies se diferenciaram no desempenho da reabilita??o de ?reas de empr?stimo.

Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2017-11-08T17:53:03Z No. of bitstreams: 1 2016 - Israel de S? Maciel.pdf: 3184590 bytes, checksum: 1d079e88bc7d2ff9256dc558436b7cd3 (MD5) / Made available in DSpace on 2017-11-08T17:53:03Z (GMT). No. of bitstreams: 1 2016 - Israel de S? Maciel.pdf: 3184590 bytes, checksum: 1d079e88bc7d2ff9256dc558436b7cd3 (MD5) Previous issue date: 2016-02-02 / CAPES / Pinnipeds produce a variety of underwater sounds that are often related to reproductive activities and social interactions. In addition, several species of seals provide evidence of vocalizations with geographical and individual variations. Most of bioacoustics researches with seals studied the terrestrial environment repertoire using linear analysis. However, some characteristics of vocalizations can not be explained with linear analysis only or taking into account only one part of the animal's life. The nonlinear phenomena (NLP) present in vocalizations (sideband, harmonic, sub-harmonic, biphonation, jump of frequency and deterministic chaos) are still poorly studied. Given the importance of this phenomena in vocalizations to individual recognition, especially in social mammals, was studied the underwater vocalizations of Antarctic seals in order to know their vocal repertoire and their NLP as well as discuss their possible function. In 2013, Brazilian Navy conducted acoustic recordings on Half Moon Island. In this collection were recorded 128GB of sound files between 12th and 30th of November. A total of 18 days of uninterrupted collections, producing 7,448 files of 3 minutes each. These recordings were taken at the presence of seals to Lobodontini Tribe. A total of 15 types of vocalizations were found in the period between days 12-16/November. A pattern in the vocalizations types L, K and E, arranged in sequence K, L and E, respectively, was observed in all seal recordings. All files presented biphonations, jumps of frequency, harmonics, sidebands and chaos in nine types of vocalizations (A, C, E, F, K, L, M, N and O). The nonlinearities were abundant on all files, being present in 75.56% (N = 1829) of vocalizations. Deterministic chaos was most common, present in 53.86% of non-linear features and 43.08% of vocalizations in general. Taking into account only the tonal vocalizations, 88.85% of vocalizations were nonlinear. The repetition of the KLE pattern also displays a recognition function. The NLP, mainly deterministic chaos, had high incidence in the studied vocalizations indicating that this type has an important role in communication. Furthermore, it seems to belong to the acoustic pattern of Antarctic?s Lobodontines. / Pin?pedes produzem uma variedade de sons subaqu?ticos que frequentemente s?o relacionados com atividades reprodutivas e intera??es sociais. Diversas esp?cies de focas apresentam evid?ncias de vocaliza??es com varia??es geogr?ficas e individuais. A maioria dos trabalhos com focas estudou o repert?rio em ambiente terrestre e com olhares para as an?lises lineares. Entretanto, algumas caracter?sticas das vocaliza??es n?o podem ser explicadas apenas com an?lises lineares ou levando em conta apenas uma parte da vida do animal. Os fen?menos n?o lineares (FNLs) presentes em vocaliza??es (banda lateral, harm?nico, sub-harm?nico, bifona??o, pulos de frequ?ncia e caos determin?stico) ainda s?o pouco estudados. Dada a import?ncia deste fen?meno nas vocaliza??es para o reconhecimento individual, principalmente em mam?feros sociais, este trabalho buscou estudar as vocaliza??es subaqu?ticas de focas ant?rticas, visando conhecer seu repert?rio vocal e seus FNLs, bem como discutir a poss?vel fun??o dos mesmos. Em 2013, a Marinha do Brasil realizou grava??es ac?sticas na Ilha Meia Lua na Ant?rtica. Nesta coleta foram registrados 128GB de arquivos de som nos dias entre 12 e 30 de novembro, totalizando 7.448 arquivos de 3 minutos cada. Nestas grava??es foi constatada a presen?a de focas pertencentes ? Tribo Lobodontini. Contatou-se tamb?m a presen?a de 15 tipos de vocaliza??es no per?odo entre os dias 12 a 16/novembro. Em todos os dias que houve grava??es de focas foi observado um padr?o nos tipos L, K e E, organizados na sequ?ncia K, L e E, respectivamente. Ap?s a inspe??o visual de todos os arquivos, foram encontrados pulos de frequ?ncia, bifona??es, harm?nicos, bandas laterais e caos determin?stico em nove tipos de vocaliza??es (A, C, E, F, K, L, M, N e O). As n?o linearidades foram abundantes em todos os arquivos, estando presentes em 75,56% (N=1829) das vocaliza??es. O caos determin?stico foi o mais comumente observado, estando presente em 53,86% das fei??es n?o lineares e 43,08% das vocaliza??es em geral. Levando em conta apenas as vocaliza??es tonais, 88,85% das vocaliza??es foram n?o lineares. A repeti??o do padr?o KLE parece apresentar uma fun??o de reconhecimento. Os FNLs, principalmente os do tipo caos determin?stico, estiveram muito presentes nas vocaliza??es estudadas, indicando que este tipo de emiss?o possui uma fun??o importante na comunica??o. Al?m disso, estes parecem pertencer ao repert?rio ac?stico padr?o de Lobodontines ant?rticos.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-11-06T21:11:35Z No. of bitstreams: 1 MaraliceMagalhaesDeFreitas_DISSERT.pdf: 2146532 bytes, checksum: 13c7fc80b9d038f9108e5d14a1b8147a (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-11-20T23:24:32Z (GMT) No. of bitstreams: 1 MaraliceMagalhaesDeFreitas_DISSERT.pdf: 2146532 bytes, checksum: 13c7fc80b9d038f9108e5d14a1b8147a (MD5) / Made available in DSpace on 2017-11-20T23:24:32Z (GMT). No. of bitstreams: 1 MaraliceMagalhaesDeFreitas_DISSERT.pdf: 2146532 bytes, checksum: 13c7fc80b9d038f9108e5d14a1b8147a (MD5) Previous issue date: 2017-09-01 / Esta disserta??o analisa a Comunica??o P?blica enquanto instrumento de constru??o da cidadania, de emancipa??o popular e de compromisso com as quest?es sociais, diferenciando a express?o de outras formas de comunica??o custeadas com recursos p?blicos. A investiga??o se d? em di?logo com autores brasileiros, como Brand?o (2012), Duarte (2012), Matos (2012), Haswani (2013) e Bucci (2014), tendo, ainda, como base te?rica os estudos de Habermas (2003) e Z?mor (1995), refer?ncias mundiais no assunto. A partir dessa sustenta??o intelectual, o trabalho exp?e as especificidades que caracterizam e separam os sistemas de radiodifus?o privado, p?blico e estatal, sobretudo no aspecto ?programa??o?. Nesse cen?rio, apresenta-se o Estudo de Caso que analisa um programa jornal?stico da R?dio Universit?ria FM de Natal, da Universidade Federal do Rio Grande do Norte. Para atingir os objetivos, o estudo qualitativo de car?ter descritivo utiliza as pesquisas bibliogr?fica e documental; aplica??o de question?rio e de entrevista estruturada com quest?es abertas junto aos sujeitos respons?veis pelo programa no per?odo compreendido entre agosto de 2015 e fevereiro de 2017; al?m da audi??o de cinco edi??es do programa por meio de grava??es. A an?lise de conte?do tem como fundamenta??o os princ?pios universalidade, diversidade, independ?ncia e diferencia??o, propostos pela Organiza??o das Na??es Unidas para Educa??o, Ci?ncia e Cultura (UNESCO, 2001) como caracterizadores de um ve?culo de radiodifus?o p?blica. Os quatro crit?rios foram reunidos e interpretados de forma a dar corpo a uma metodologia de avalia??o do car?ter p?blico da radiodifus?o jornal?stica no Brasil. Os dados coletados apontam para uma programa??o que preza pela veracidade dos fatos e pela pluralidade de vozes, apesar da falta de intera??o da equipe com o ouvinte; confere visibilidade ?s manifesta??es culturais, mas de forma discreta e pouco efetiva; apresenta uma car?ncia no aprofundamento de assuntos pol?micos e na promo??o do debate de ideias; repete temas e abordagens encontrados em emissoras privadas sem conferir experimenta??o e originalidade ao conte?do. A pesquisa inferiu ainda que a participa??o da comunidade acad?mica como fonte de informa??o qualificada ? expressiva, mas a equipe age com autonomia em rela??o ?s autoridades p?blicas e ao mercado. Por fim, pretende-se contribuir com uma reflex?o sobre o papel de uma emissora custeada com recursos p?blicos inserida em um contexto universit?rio e com sugest?es para aperfei?oar e fortalecer o trabalho jornal?stico em um canal p?blico. / This thesis analyzes Public Communication as an instrument for building citizenship, popular emancipation and commitment to social issues, differentiating the expression of other forms of communication funded with public resources. The research is done in dialogue with Brazilian authors, such as Brand?o (2012), Duarte (2012), Matos (2012), Haswani (2013) and Bucci (2014). It also has, as a theoretical basis, the studies of Habermas (2003) and Z?mor (1995), world references on the subject. Based on this intellectual support, the work presents the specificities that characterize and separate the private, public and state broadcasting systems, especially in the "programming" aspect. In this scenario, we present the Case Study that analyzes a journalistic program of R?dio Universit?ria FM de Natal, of the Federal University of Rio Grande do Norte. To reach the objectives, the qualitative study of a descriptive character uses bibliographical and documentary research; application of questionnaire and structured interview with open questions with the subjects responsible for the program in the period between August 2015 and February 2017; In addition to the auditioning of five program editions through recordings. The content analysis is based on the principles of universality, diversity, independence and differentiation, as proposed by the United Nations Organization for Education, Science and Culture (UNESCO, 2001) as the characterization of a public broadcasting vehicle. The four criteria were gathered and interpreted to form a methodology for evaluating the public character of journalistic broadcasting in Brazil. The collected data point to a programming that values the truthfulness of the facts and the plurality of voices, despite the lack of interaction of the team with the listener; gives visibility to cultural manifestations, but in a discreet and not very effective way; presents a lack of deepening of controversial issues and of the promotion of the debate of ideas; repeats themes and approaches found in private broadcasters without giving experimentation and originality to content. The research also inferred that the participation of the academic community as a source of qualified information is expressive, but the team of the newspaper acts with autonomy in relation to the public authorities and to the market. Finally, it intends to contribute with a reflection on the role of a broadcaster funded with public resources inserted into a university context and with suggestions to improve and strengthen the journalistic work in a public channel.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-11-22T19:37:02Z No. of bitstreams: 1 MariaAparecidaDaSilvaAndrade_TESE.pdf: 1006466 bytes, checksum: 427477fb09de3e3d616d6bea87cc97a6 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-11-22T23:17:33Z (GMT) No. of bitstreams: 1 MariaAparecidaDaSilvaAndrade_TESE.pdf: 1006466 bytes, checksum: 427477fb09de3e3d616d6bea87cc97a6 (MD5) / Made available in DSpace on 2017-11-22T23:17:33Z (GMT). No. of bitstreams: 1 MariaAparecidaDaSilvaAndrade_TESE.pdf: 1006466 bytes, checksum: 427477fb09de3e3d616d6bea87cc97a6 (MD5) Previous issue date: 2017-08-29 / Esta tese examina constru??es gramaticais com o verbo ir no portugu?s brasileiro contempor?neo. A hip?tese ? que esse verbo, acompanhado de outros elementos lingu?sticos (como ver, que, l? e ainda) mais outra ora??o, forma constru??es gramaticais, nos termos de Goldberg (1995, 2003). Assim, interessa investigar fun??es sem?ntico-cognitivas e discursivo-pragm?ticas dessas constru??es, examinando-se: 1) os elementos constitutivos da constru??o em seus aspectos morfossint?ticos e sem?nticos; 2) contextos de uso dessas constru??es e suas instancia??es; 3) processos cognitivos envolvidos para a diferencia??o categorial e sem?ntica; e 4) motiva??es discursivo-pragm?ticas implicadas nos usos dessas constru??es. A pesquisa fundamenta-se teoricamente nos pressupostos da Lingu?stica Funcional Centrada no Uso articulada ao modelo te?rico da Gram?tica de Constru??es. A metodologia ? de base qualitativo-interpretativista, na qual se analisam exemplares encontrados em alguns padr?es discursivos constantes em jornais e revistas, provenientes do Buscador Google, produzidos em situa??es reais de comunica??o. Os resultados apontam que as constru??es gramaticais com ir podem ser consideradas, em certa medida, parcialmente especificadas, de produtividade limitada e gradientes quanto ? composicionalidade. Ademais, indicam que essas constru??es resultam de extens?es de sentido (meton?micas e metaf?ricas), estando fortemente vinculadas ? (inter)subjetividade. / This thesis examines grammatical constructions with the verb to go in Brazilian Portuguese. The hypothesis is that this verb, accompanied by other linguistic elements (like ver, que, l? and ainda) plus another sentence, forms grammatical constructions, as proposed in Goldberg (1995). Thus, it is important to investigate the semantic-cognitive and discursive-pragmatic functions of these constructions, examining: 1) the constitutive elements of the construction in its morphosyntactic and semantic aspects; 2) the contexts of use of these constructions and their instantiations; 3) cognitive processes involved for the categorical and semantic differentiation; and 4) discursive-pragmatic motivations implicated in the uses of these constructions. The research is theoretically based on the assumptions of Usage-Based Linguistics associated with the theoretical model of the Construction Grammar. The methodology is composed of a qualitative-interpretative basis, in which exemplars found in some discursive patterns in newspapers and magazines produced in real communication situations are analyzed, coming from the Google search engine. The results indicate that the constructions with ir can be considered, to some extent, partially filled, with limited types and gradient in compositionality. Moreover, they point out that these constructions emerged based on semantic extensions (metonymy and metaphorical) and that they are strongly linked to (inter)subjectivity.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-12-04T22:01:03Z No. of bitstreams: 1 FranciscoRicardoAvelinoDantasFilho_DISSERT.pdf: 27214084 bytes, checksum: 85a56b1dbab70a79159a0a944cbc10ce (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-12-11T20:01:44Z (GMT) No. of bitstreams: 1 FranciscoRicardoAvelinoDantasFilho_DISSERT.pdf: 27214084 bytes, checksum: 85a56b1dbab70a79159a0a944cbc10ce (MD5) / Made available in DSpace on 2017-12-11T20:01:44Z (GMT). No. of bitstreams: 1 FranciscoRicardoAvelinoDantasFilho_DISSERT.pdf: 27214084 bytes, checksum: 85a56b1dbab70a79159a0a944cbc10ce (MD5) Previous issue date: 2017-07-28 / Este trabalho relata as etapas de pesquisa e concep??o de um anteprojeto de arquitetura de um edif?cio com locais de ensaios de m?sica e dan?a, contendo sala de apresenta??o multiuso desenvolvida a partir de par?metros ac?sticos e visuais. Justifica-se na medida em que a utiliza??o de diretrizes ac?sticas e visuais em uma sala de apresenta??es proporciona n?vel de conforto satisfat?rio, tanto para os artistas quanto para o p?blico. Com base em estudos de condicionamento ac?stico desses espa?os, se defende que a inser??o de diretrizes projetuais ac?sticas e visuais no in?cio do processo de projeto dessas salas venha minimizar problemas futuros durante o desenvolvimento do projeto espec?fico feito por profissional especialista em ac?stica. Para embasar o desenvolvimento da proposta, foi realizada revis?o bibliogr?fica para identifica??o de diretrizes projetuais que favore?a o condicionamento ac?stico e visibilidade em salas de apresenta??es sendo aplicados na concep??o do projeto. Durante a pesquisa foram realizadas simula??es em softwares de ac?stica para valida??o das solu??es propostas. / This work reports the research and conception stages of an architectural design for a building with music and dance venues containing a multipurpose presentation room developed with acoustic and visual parameters. It is justified because the use of acoustic and visual guidelines in a Concert Hall provides a satisfactory comfort level for both artists and the public. Based on acoustic conditioning studies of those spaces, it is argued that the insertion of acoustic and visual design guidelines at the beginning of the design process for these rooms will minimize future problems during the development of the specific project done by a professional expert in acoustics. To support the development of the proposal, a bibliographical review was made to identify design guidelines that favor acoustic conditioning and visibility in presentation rooms being applied during the conception of the project. During the research, simulations were performed in acoustic software to validate the proposed solutions.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2018-01-16T19:53:10Z No. of bitstreams: 1 FranclinRobiasDaSilvaJunior_DISSERT.pdf: 3799612 bytes, checksum: 8e5d6dad107e19556eae1c9b7b165776 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2018-01-22T14:55:41Z (GMT) No. of bitstreams: 1 FranclinRobiasDaSilvaJunior_DISSERT.pdf: 3799612 bytes, checksum: 8e5d6dad107e19556eae1c9b7b165776 (MD5) / Made available in DSpace on 2018-01-22T14:55:41Z (GMT). No. of bitstreams: 1 FranclinRobiasDaSilvaJunior_DISSERT.pdf: 3799612 bytes, checksum: 8e5d6dad107e19556eae1c9b7b165776 (MD5) Previous issue date: 2017-09-15 / Este trabalho prop?e uma alternativa para efetuar o balanceamento de cargas em uma instala??o el?trica, aplicando t?cnica de otimiza??o baseada em uma heur?stica evolutiva. O c?digo desenvolvido ser? usado para planejar a redistribui??o das cargas el?tricas no pr?dio da Reitoria do Instituto Federal de Educa??o, Ci?ncia e Tecnologia do Rio Grande do Norte (IFRN). O objetivo principal ? desenvolver um projeto t?cnico para melhorar o equil?brio das cargas el?tricas da edifica??o, reduzindo perdas e aumentando a efici?ncia, favorecendo, ao mesmo tempo, a qualidade da energia na instala??o. / This work proposes an alternative to load balancing in an electrical installation, applying optimization technique based evolutionary heuristic. The developed code will be used to plan the redistribution of electric charges in the Rectory of the Federal Institute of Education, Science and Technology of Rio Grande do Norte (IFRN). The main objective is to develop a technical project to improve the balance of electrical loads of the building, reducing losses and increasing efficiency, at the same time favoring the quality of the energy in the installation.

Made available in DSpace on 2014-12-17T14:06:59Z (GMT). No. of bitstreams: 1 SergioBS_DISSERT.pdf: 2441407 bytes, checksum: dc40986905dcf52b4a6c2c3e2499b479 (MD5) Previous issue date: 2010-03-30 / In this paper we developed a prototype for dynamic and quantitative analysis of the hardness of metal surfaces by penetration tests. It consists of a micro-indenter which is driven by a gear system driven by three-rectified. The sample to be tested is placed on a table that contains a load cell that measures the deformation in the sample during the penetration of micro-indenter. With this prototype it is possible to measure the elastic deformation of the material obtained by calculating the depth of penetration in the sample from the difference of turns between the start of load application to the application of the load test and return the indenter until the complete termination of load application. To determine the hardness was used to measure the depth of plastic deformation. We used 7 types of steel trade to test the apparatus. There was a dispersion of less than 10% for five measurements made on each sample and a good agreement with the values of firmness provided by the manufacturers. / Nesse trabalho ? desenvolvido um prot?tipo para an?lise din?mica e quantitativa da dureza de superf?cies met?licas atrav?s de ensaios de penetra??o. Ele consiste de um micro-penetrador que ? movimentado por um sistema de engrenagens guiado por tr?s pinos retificados. A amostra a ser ensaiada ? colocada sobre uma mesa que cont?m uma c?lula de carga que mede a deforma??o na amostra durante a penetra??o do micro-penetrador. Com esse prot?tipo ? poss?vel medir a deforma??o el?stica do material obtida pelo c?lculo, atrav?s de software, da profundidade da penetra??o na amostra a partir da diferen?a de voltas entre o in?cio de aplica??o de carga at? a aplica??o total da carga de teste e o retorno do indentador at? a completa finaliza??o da aplica??o de carga. Para determina??o da dureza foi utilizada a medida da profundidade de deforma??o pl?stica. Foram utilizados 07 tipos de a?os comerciais para teste do aparato. Verificou-se uma dispers?o inferior a 10% para cinco medi??es efetuadas em cada amostra e uma boa concord?ncia com os valores de dureza fornecidos pelos fabricantes.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-08-16T20:26:44Z No. of bitstreams: 1 RamonVictorAlvesRamalho_DISSERT.pdf: 3544431 bytes, checksum: 87ec396d0fd97098e89f51fc29eb2b56 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-08-18T22:27:19Z (GMT) No. of bitstreams: 1 RamonVictorAlvesRamalho_DISSERT.pdf: 3544431 bytes, checksum: 87ec396d0fd97098e89f51fc29eb2b56 (MD5) / Made available in DSpace on 2016-08-18T22:27:19Z (GMT). No. of bitstreams: 1 RamonVictorAlvesRamalho_DISSERT.pdf: 3544431 bytes, checksum: 87ec396d0fd97098e89f51fc29eb2b56 (MD5) Previous issue date: 2016-02-12 / A inje??o de vapor ? um m?todo de recupera??o de petr?leo realizado injetando vapor diretamente no po?o at? o reservat?rio. O vapor provoca a dilata??o do revestimento, que ap?s a redu??o na temperatura tende a voltar ?s dimens?es iniciais, provocando a forma??o de trincas no cimento e perda de isolamento hidr?ulico. Neste contexto, o L?tex do tipo SBR ? utilizado para melhorar a flexibilidade da matriz do cimento reduzindo as falhas por fadiga. Para evitar estas falhas, os par?metros de resist?ncia mec?nica devem ser rigorosamente ajustados ?s condi??es do po?o. Para o estado fresco, as pastas de cimento devem permanecer fluidas e homog?neas, durante o bombeio, para que seu deslocamento n?o comprometa a janela operacional do po?o. Este trabalho tem como objetivo estudar o comportamento mec?nico de sistemas de pasta de cimento Portland, aditivadas com L?tex SBR, para cimenta??o de po?os de petr?leo sujeitos ? inje??o de vapor. Atrav?s do planejamento fatorial composto central foi estudado o comportamento da resist?ncia ? compress?o API variando a densidade da pasta entre 1,75g/cm? (14,6 lb/Gal) e 1,89 g/cm? (15,8lb/Gal), o tempo de cura entre 4 dias e 28 dias e concentra??o de L?tex SBR entre 0 L/m? e 534,722 L/m? (0 gpc e 4 gpc). Os resultados apontam que o com o aumento da concentra??o do l?tex SBR, dentro os intervalos determinados, ocorreu uma diminui??o significativa da resist?ncia ? compress?o pelo aumento da capacidade de deforma??o el?stica da pasta. A partir dos resultados obtidos ? poss?vel determinar melhores condi??es de formula??o de pastas aplic?veis em opera??es de cimenta??o de po?o de petr?leo sujeito ? inje??o de vapor. / Steam injection is an oil recovery method accomplished by introducing steam directly into the oil well to the reservoir. The steam causes dilation of the casing, which, after reduction in temperature, tends to return to the initial dimensions: causing the formation of cracks in the cement and loss of hydraulic isolation.. In this context, the type of the SBR latex is used to improve the flexibility of the cement matrix by reducing the amount of fatigue failure. To prevent these failures, the mechanical resistance parameters should be carefully adjusted to well conditions. This work aims to study the mechanical behavior of cement slurry systems additivated with SBR latex for cementing oil wells subject to steam injection. Through the central composite factorial design was studied the behavior of the compressive strength by varying the density of the paste between 1.75 g /cm? (14.6 lb/ Gal) and 1.89 g/cm? (15,8lb / Gal), curing time between 4 days and 28 days and concentration of SBR Latex between 0 L / m? and 534.722 L / m? (0 gpc and 4 gpc). The results showed that increasing the concentration of SBR latex, within the given ranges, there was a decreased compression resistance and elastic modulus by increasing the elastic deformability of the slurry. From the results it can determine best slurries formulation conditions in oil well cementing operations subject to steam injection.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-08-26T23:00:34Z No. of bitstreams: 1 BeatrizDeLucenaMoreira_DISSERT.pdf: 880222 bytes, checksum: be8a2954e28c370a8f48778914a66dc4 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-08-30T20:28:08Z (GMT) No. of bitstreams: 1 BeatrizDeLucenaMoreira_DISSERT.pdf: 880222 bytes, checksum: be8a2954e28c370a8f48778914a66dc4 (MD5) / Made available in DSpace on 2016-08-30T20:28:08Z (GMT). No. of bitstreams: 1 BeatrizDeLucenaMoreira_DISSERT.pdf: 880222 bytes, checksum: be8a2954e28c370a8f48778914a66dc4 (MD5) Previous issue date: 2016-05-16 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Neste trabalho, focalizo a constru??o temporal [XTEMP + (EM) + QUE + O], em seus aspectos formais e funcionais. Objetivo analisar aspectos estruturais, sem?ntico-cognitivos e pragm?ticos envolvidos em seu uso. Em termos metodol?gicos, esta pesquisa envolve tanto o vi?s quantitativo - relacionado ? verifica??o da frequ?ncia de uso da constru??o em foco e sua descri??o - como o qualitativo, que diz respeito ao estabelecimento das motiva??es implicadas no uso dessa constru??o. O banco de dados utilizado para an?lise consiste de exemplares escritos do corpus m?nimo do Projeto Para a Hist?ria do Portugu?s Brasileiro (PHPB) e de textos escritos e falados do portugu?s contempor?neo, coletados no Corpus Discurso & Gram?tica. O trabalho fundamenta-se no aporte te?rico da Lingu?stica Funcional Centrada no Uso (LFCU), conforme caracterizada por Furtado da Cunhas, Bispo e Silva (2013). Ademais, agrego contribui??es da Gram?tica de Constru??es, conforme Croft (2001), Goldberg (2006) e Traugott e Trousdale (2013). Os resultados mostram, dentre outros aspectos, que a constru??o temporal investigada licencia dois padr?es subesquem?ticos (distintos pela presen?a ou n?o de preposi??o em antes de que), os quais apresentam especificidades sem?ntico-cognitivas e pragm?ticas, estando seu uso correlacionado ao g?nero textual e ? modalidade de l?ngua em que foram produzidos. Esses dois subesquemas convivem, pelo menos, desde o s?culo XIX, e parecem representar formas em competi??o, revelando um caso de mudan?a construcional. Tamb?m parece haver um processo de construcionaliza??o no interior da constru??o em estudo, envolvendo estruturas menores, no caso [XTEMP] e [EM QUE], que passam a constituir um novo pareamento forma-fun??o [XTEMP + QUE], o qual funciona como conector oracional. / In this work, I investigate the temporal construction [XTEMP + (EM) + QUE + O], by considering its formal and functional aspects. I aim to analyze structural, semantic-cognitive and pragmatic aspects in its use. In terms of methodology, this paper is quantitative - being related to the construction description and its frequency, as well as qualitative - being related to its use motivation. In terms of corpus, this research uses historical written data from Projeto Para a Hist?ria do Portugu?s Brasileiro (PHPB), and modern written and spoken texts from Corpus Discurso & Gram?tica. This work is based on Lingu?stica Funcional Centrada no Uso (LFCU) theory, according to Bispo, Silva e Furtado da Cunha (2013). Furthermore, there are also Grammar Construction contributions, according to Goldberg (2006) and Traugott and Trousdale (2013). The results show, among other things, that the temporal construction license two subschematic patterns (different between each other due to preposition em presence or absence), which have semantic-syntactic and discursive-pragmatic specificities Also, the use of subschematic structures is related to the gender and linguistic modality in which they were produced and to invited inference. These subschemas occur together at least since 19th century and seem to be in competition, revealing constructional change. Besides, it looks like there is a constructionalization process inside the temporal construction investigated, involving smaller structures (in this case, [XTEMP], [(EM) QUE] and [O]), which become two new form-meaning pairings.