Nous nous intéressons, dans cette étude, à la caractérisation d'un défaut en développe une méthode ultrasonore basée sur la diffusion multiple des ondes. Pour cela, nous avons utilisé un béton base polymère endommagé par un essai de flexion en trois points. La technique d’'Interférométrie par Onde de Coda (CWI) prend en compte les ondes issues de la diffusion multiple et qui parcourent de ce fait une distance très grande devant celle séparant la source et du récepteur. Cette technique montre la sensibilité de la coda quand le matériau est soumis en résonance non linéaire où l’ influence des conditions de l’ environnement est considéré comme limité par l’ utilisation d’ un signal différent de référence. Les résultats expérimentaux ont montré que l’ efficacité de la méthode dépend du plan de vibrations considérées. Dans le but d'étudier l’ anisotropie d’ un défaut créé dans un béton base polymère nous avons utilisé les données de l’'Emission Acoustique (EA) récoltées au cours d’ essais acoustiques en Résonance Non Linéaire pour les deux plans. L’ existence d'une différence entre les signaux enregistrés au cours de mesures de l’ EA montrent que nous produisons différents micro-mécanismes dont la présence et / ou l'absence ont un impact important important sur l'interaction entre l'onde ultrasonore et le défaut. / Nonlinear Resonance (NR) and Coda Wave Interferometry (CWI) have proved to be efficient to detect and follow the evolution of micro-cracks within a strongly scattering media (concrete, rocks, etc.). Nevertheless, the localization of the cracks using the same techniques is not straight forward. In order to avoid the conditioning and its subsequent relaxation effect related to NR, CWI is simultaneously applied when concrete samples are vibrating in the linear regime. Based on a comparative study of the coda signals contents (non ballistic part) in the absence and under the weak linear vibration, the localization of the mechanically induced scatterers was possible depending on the scatterers' main direction with respect to the vibration plane. The latter point raises the issue of the generated types of vibration at the scatterers. Therefore, investigations were performed using the Acoustic Emission (AE) technique, which has served to verify that the acoustic activity during the linear vibrations does change depending on the considered experimental configuration. The latter, has also a direct effect on the frequency content of the recorded AE hits showing the potential link existing between the quantitative analysis of AE hits and the generated vibration mechanisms of the existing micro-cracks.

Une estimation précise de la magnitude est primordiale pour établir des catalogues de sismicité fiables. L’objectif de cette thèse est de développer une méthode d’estimation de la magnitude de moment à partir de la coda des ondes crustales applicable sur les sismogrammes numériques et analogiques. Afin d’étudier les propriétés de la coda en France, nous avons réalisé une analyse fréquentielle et régionale des enveloppes de coda. Nous avons pu estimer le moment sismique M0 et la magnitude de moment Mw pour des sismogrammes numériques, mais pas pour des enregistrements sur papier pour lesquels le filtrage n’est pas possible. Nous avons donc observé les propriétés de la coda dans le domaine temporel. Nous avons déterminé un modèle empirique afin de représenter les enveloppes de coda du signal brut et obtenir une magnitude de coda Mcoda. A partir de la relation linéaire Mcoda/Mw, nous avons déterminé la magnitude de moment directement sur les enregistrements analogiques en France. / Accurate magnitude determination is necessary to establish reliable seismicity catalogs in order to assess seismic hazard. The main goal of this PhD is to develop a method for estimating moment magnitude Mw from coda waves applicable to new digital seismograms as well as to old paper records in France. In order to analyze coda waves properties in France, a study of the regional and frequency properties of coda-wave envelopes has been performed. From this spectral analysis of coda waves, we can estimate seismic moment M0 and moment magnitude Mw from digital seismograms but not from paper records for which no frequency filtering is possible. Therefore, in a second step, we have analyzed the coda-waves properties directly in the time domain. We develop an empirical model which fits the coda envelopes of the raw signal and permits to obtain a coda magnitude Mcoda. From the Mcoda/Mw relationship, we determined the moment magnitude directly from the old paper records in France.

Com base teórico-metodológica da Dialetologia Pluridimensional (RADTKE e THUN, 1996; THUN, 2000, 2005 etc.), esta tese de doutorado apresenta sobretudo um atlas linguístico pluridimensional do português paulista (conhecido como \"dialeto caipira\") nos níveis semântico-lexical e fonético-fonológico e faz contribuições metodológicas de diferentes naturezas. Trata-se de contribuições à metodologia de coleta de dados empíricos, à metodologia de organização de corpora, e à metodologia de elaboração de atlas linguísticos pluridimensionais. No campo analítico, uma das contribuições deste estudo refere-se às contrapartes (a)fonéticas do arquifonema /R/ em quatro situações de coda silábica: (i) externa de desinência infinitiva (DI) seguida por pausa; (ii) externa em sílaba tônica (que não de DI) seguida por pausa; (iii) interna em sílaba tônica; e (iv) interna em sílaba átona. Quanto à situação (i), a seguinte hipótese em específico foi testada: os jovens entre 18 e 36 anos de idade do Médio Tietê (esp. aqueles com alta escolaridade, AE) estão produzindo a variante [ ɻ ] (a aproximante retroflexa, conhecida como \"erre caipira\") para o /R/ na situação (i) sob uma frequência relativa inferior àquela a ser observada entre os mais velhos a partir de 55 anos de idade (esp. aqueles com baixa escolaridade, BE). Como resultado, a fala dos jovens revelou-se na verdade mais albergadora da variante [ ɻ ] do que a fala dos mais velhos. A frequência relativa do fone referido em perspectiva com suas covariantes foi de 57% entre os jovens com AE e 62% entre os jovens com BE (contra 45% entre os mais velhos com AE e 30% entre os mais velhos com BE). Os dados são de 80 voluntários moradores em alguns dos municípios mais antigos do interior paulista: Santana de Parnaíba, Pirapora do Bom Jesus, Araçariguama, São Roque, Sorocaba, Itu, Porto Feliz, Tietê, Capivari e Piracicaba. A coleta dos dados realizou-se com a aplicação dos instrumentos metodológicos do Atlas Linguístico do Brasil (ALiB, 2014) com modificações, gerando um conjunto de corpora, constituído por corpora semântico-lexicais, corpora fonético-fonológicos, um corpus metalinguístico-etnográfico e corpora extralinguísticos. Como base de dados, esse conjunto de corpora permitiu a elaboração do atlas linguístico de maneira a contemplar, além da dimensão diatópica inerente a esse empreendimento cartográfico e geolinguístico, ainda as dimensões diastrática, diagenérica e diageracional. No campo teórico-metodológico, uma das contribuições mais importantes deste trabalho reside no desenvolvimento de uma série de procedimentos ao inquérito semântico-lexical a qual denominamos \'técnica de entrevista orientada à contundência responsiva/anuente\', diretamente baseada na \'técnica de entrevista de três tempos\', por sua vez concebida pelo Dr. Thun (ADDU, 2000). Esta pesquisa só foi possível graças ao apoio da Fundação de Amparo à Pesquisa do Estado de São Paulo FAPESP (procs. 2015/14038-5 e 2011/51787-5), do Serviço Alemão de Intercâmbio Acadêmico DAAD (prog. 57214225) e da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior CAPES (proc. 0128-16-3 / 99999.000128/2016-03). / Following the theoretical and methodological background of the Pluridimensional Dialectology (RADTKE & THUN, 1996; THUN, 2000, 2005, among others), this doctoral thesis presents mainly a pluridimensional linguistic atlas of the Portuguese spoken in the Brazilian state of São Paulo, also known as \"Caipira\" dialect. The linguistic levels approached are both semantic-lexical and phonetic-phonological. This study also makes methodological contributions to data collection process, to corpora structuring, and to development of pluridimensional atlases. Regarding the analyses, the archiphoneme /R/\'s phonetic counterparts were investigated in four different syllable codas: (i) final of infinitive ending (IE) followed by a break; (ii) final in stressed syllable (but not of IE) followed by a break; (iii) medial in stressed syllable; and (iv) medial in unstressed syllable. Concerning case (i), a specific hypothesis was tested out, namely: young individuals aged 18 to 36 from the Médio Tietê region (esp. those with high education, HE) articulate the variant [ ɻ ] (voiced retroflex approximant, also known as \"Caipira-R\") for the /R/ in case (i) under a relative frequency that is lower than the one to be observed among elders from 55 years of age (esp. those with low education, LE). Surprisingly, it turned out that younger ones speak [ ɻ ] more than older ones do. The relative frequency of [ ɻ ] put in perspective with its covariants was 57% among HE young individuals and 62% among LE ones (against 45% among HE elders and 30% among LE ones). Data from 80 local speakers were collected in some of the São Paulo State\'s oldest inland cities: Santana de Parnaíba, Pirapora do Bom Jesus, Araçariguama, São Roque, Sorocaba, Itu, Porto Feliz, Tietê, Capivari, and Piracicaba. For the data collection, methodological instruments made by \"Atlas Linguístico do Brasil\" (ALiB, 2014) were applied after modifications. Thus, a set of corpora was produced: semanticlexical ones, phonetic-phonological ones, a metalinguistic-ethnographic one, and extralinguistic ones. They constitute the database for the elaboration of the atlas, which encompasses in addition to the diatopic dimension inherent in this cartographic and geolinguistic undertaking diastratic, diagender-specific, and diagenerational dimensions. From a both theoretical and methodological perspective, another contribution of this work lies in the development of a series of procedures whose main goal is to obtain the informants\' certitude about answers in the semantic-lexical interview that is derived from the three-step technique created by Dr. Thun (ADDU, 2000). This research was only possible thanks to \"Fundação de Amparo à Pesquisa do Estado de São Paulo\" FAPESP (process numbers 2015/14038-5 and 2011/51787-5), German Academic Exchange Service DAAD (funding program number 57214225), and \"Coordenação de Aperfeiçoamento de Pessoal de Nível Superior\" CAPES (process number 0128-16-3 / 99999.000128/2016- 03).

Submitted by Verena Pereira (verenagoncalves@uefs.br) on 2018-07-20T22:29:00Z No. of bitstreams: 1 Disserta??o Robevaldo.pdf: 2121176 bytes, checksum: 98bf6ed19ea1c2a81242cec6e79c221a (MD5) / Made available in DSpace on 2018-07-20T22:29:00Z (GMT). No. of bitstreams: 1 Disserta??o Robevaldo.pdf: 2121176 bytes, checksum: 98bf6ed19ea1c2a81242cec6e79c221a (MD5) Previous issue date: 2017-12-19 / Based on the theoretical and methodological assumptions of labovian sociolinguistics and the multidimensional geolinguistics, this research aims to investigate the variable realization of the post-vocalic lateral / l / in the position of syllabic coda in Bahia communities of the Linguistic Atlas of Brazil Project (ALiB Project). For this purpose, we analyze a corpus with 24 interviews with natural informants from the following locations, members of the ALiB Project network: Euclides da Cunha, Barra, Jacobina, Seabra, Santo Amaro and Santa Cruz Cabr?lia. According to the methodology of the ALiB Project, the informants are stratified by both sexes, with four informants in each city, divided into two age groups (range 1 ? 18 to 30 years old and range 2 ? 50 to 65 years old), graduated, at most, until High School. To carry out the research, the following hypotheses were raised: the / l / in the final position of the syllable is variable in the speech of the investigated communities, with the vocalized variant [w] already widely disseminated in the speech from Bahia cities, but not in a categorical way; the interaction between linguistic and social factors in the variation of / l / is the vector of this phenomenon; the variation of / l / points to a change in progress. The results point to a tendency to change, in which the erasing of the dependent variable has been abandoned by the younger informants in favor of the vocalized variant, so that the implementation of the vocalization presents different stages in each of the selected localities / Pautada nos pressupostos te?rico-metodol?gicos da sociolingu?stica laboviana e da geolingu?stica pluridimensional, esta pesquisa tem por objetivo investigar a realiza??o vari?vel da lateral p?s-voc?lica /l/ em posi??o de coda sil?bica em comunidades baianas do Projeto Atlas Lingu?stico do Brasil (Projeto ALiB). Para tanto, foram utilizadas na composi??o do corpus analisado 24 entrevistas com informantes naturais das seguintes localidades, integrantes da rede de pontos do Projeto ALiB: Euclides da Cunha, Barra, Jacobina, Seabra, Santo Amaro e Santa Cruz Cabr?lia. Em conformidade com a metodologia do Projeto ALiB, os informantes s?o estratificados pelos dois sexos, sendo quatro informantes em cada munic?pio, distribu?dos por duas faixas et?rias (faixa 1 ? 18 a 30 anos e faixa 2 ? 50 a 65 anos), com escolaridade, no m?ximo, at? o Ensino M?dio. Para proceder ? pesquisa, foram levantadas as seguintes hip?teses: o /l/ em posi??o final de s?laba ? vari?vel na fala das comunidades investigadas, com a variante vocalizada [w] j? bastante disseminada na fala do interior baiano, mas n?o de maneira categ?rica; a intera??o entre fatores lingu?sticos e sociais na varia??o de /l/ ? o vetor desse fen?meno; a varia??o de /l/ aponta para uma mudan?a em progresso. Os resultados apontam uma tend?ncia ? mudan?a, em que o apagamento da vari?vel dependente tem sido abandonado pelos informantes mais jovens em favor da variante vocalizada, de modo que a implementa??o da vocaliza??o apresenta est?gios diferentes em cada uma das localidades selecionadas

Ce travail de thèse est une contribution au développement des méthodes d’acoustique non linéaire pour le contrôle non destructif et l’imagerie de défauts de type contact dans les solides.Dans ce travail, des modifications sont proposées pour deux méthodes récentes de contrôle non destructif par acoustique non linéaire : l’interférométrie de coda couplée au retournement temporel, et l’imagerie non linéaire par ultrasons aériens. Le principal avantage de la première méthode est sa sensibilité extrême liée à l’accumulation des effets induits par des changements, même faibles, des propriétés de l’échantillon durant la formation de la coda. La deuxième méthode apporte une approche complémentaire en permettant de réaliser un contrôle sans contact. Les techniques développées ont été testées sur des échantillons présentant des défauts artificiels à des emplacements connus. Les performances de chacune des méthodes ont été étudiées.La deuxième partie de ce travail porte sur la description théorique des non-linéarités acoustiques de contact et leur utilisation pour le développement d’une boite à outils numériques permettant la simulation d’ondes acoustiques dans des structures complexes contenant des contacts internes. Un model physique décrivant le décalage tangentiel de deux corps en contact en présence de friction est proposé. Il aboutit à une solution analytique pour la relation présentant une hystérésis entre les déplacements de contact normal et tangentiel et les chargements. Ce modèle est utilisé comme condition aux frontières pour les surfaces de contact internes (défauts) dans un modèle de propagation d’ondes acoustiques utilisant un logiciel d’éléments finis commercial / This PhD thesis work contributes to the development of nonlinear elastic methods for non-destructive testing and imaging of contact-type defects in solids.In this work, two modifications of recent nonlinear nondestructive testing methods are suggested: the coda wave interferometry combined with the nonlinear time reversal principle and air-coupled nonlinear ultrasonic imaging. The principal advantage of former technique is in its extremely high sensitivity owing to the fact that weak changes in sample's parameters are accumulated and finally greatly amplified during the formation of the coda wave. The other technique has a complimentary strength and offers a possibility of a remote detection. The developed techniques are tested on samples with artificially fabricated defects at known locations. The performance of each method is accessed and the potential for obtaining robust nonlinear images is demonstrated.The second part of the work is concerned with a theoretical description of contact acoustical nonlinearity and its use for creating of a numerical toolbox capable of simulating wave propagation in complex structures containing internal contacts. A physical model describing the tangential shift of two contacting bodies in the presence of friction has been proposed. Its result is an analytical computer-assisted solution for hysteretic relationships between normal and tangential contact displacements and loads. The contact model and derived load-displacement relationships are used as boundary conditions posed at the internal boundaries (contact surfaces) in a finite element wave propagation model programmed via commercial software

Comment parle-t-on de quelque chose lorsque l'on n'est pas sûr de savoir de quoi il s'agit? Comment construit-on du sens au beau milieu d'une crise sémantique? Et Pourquoi? Cette thèse envisage la production linguistique dans un corpus choisi pour sa haute spécificité: le direct de CNN le 11 septembre 2001. La première partie décrit et justifie le choix de la situation de l'événement en cours et la constitution du corpus, qui bénéficiera d'une double approche, inductive et déductive. La seconde partie analyse les cadres du discours contraints par la situation et contraignant les productions: le direct télévisé et l'interaction y sont caractérisés et analysés. La typologie des profils sociodiscursifs conduit à une analyse en termes de modes de discours. La troisième partie envisage les contraintes cognitives, en intégrant les apports de la psycholinguistique. Négociation de la référence, construction du common ground, structuration de l'information y sont considérés dans le corpus, qui présents bien souvent une déviation par rapport à la situation en langue générale. Une conclusion revient sur le parcours théorique et méthodologique qui aura été nécessaire ainsi que sur certaines conclusions d'analyses. / How do we talk about something when we do not know what it is we are talking about? How do you construct meaning when it escapes? And why do we dot that? The dissertation explores linguistic production in a corpus chosen because it is highly specific: CNN's live broadcast on 9/11. The first describes and justifies this choice in terms of the situation of an ongoing event and in terms of corpus methodology; since its analysis blends inductive and deductive approaches. The second part considers frames of discourse as constrained by the situation and constraining linguistic productions: the TV live broadcast and the interaction are characterized and analyzed. Sociodiscursive profiles emerge that correlate modes of discourse. The third part considers cognitive constraints on verbalizations from the point of view of theories of common ground, bridging linguistics and psycholinguistics. Reference construction, information structuring, the notion of key-words confirm the specific quality of the corpus, deviating from general norms. A conclusion retraces the complex theoretical and methodological considerations and sums up analytical contributions.

Made available in DSpace on 2016-08-03T16:15:39Z (GMT). No. of bitstreams: 1 Osmar Roberto pereira.pdf: 1469522 bytes, checksum: 2c1ebd66d22e29d50cb2d00bf8278dd2 (MD5) Previous issue date: 2012-12-13 / This paper seeks to present the experiences of three listeners, besides the author, childrens of deaf parents, discussing family relationships between parents and children, showing the differences in relation to families who have no deaf people at its core, demystifying prejudices and pre -concepts. Due to communication barriers and prejudice, many deaf people ended up being deprived of the right to be parents. In the reports presented in this thesis, there were times when it almost happened in the lives of the subjects interviewed for this research, but with strength and awareness of rights they had, these deaf parents would not allow such a thing to happen. The text begins with the history and formation of the author to then bring the authors covering topics such as deafness (Wrigley, 1996; Lacerda, 1998; Perlin, 1998; Moura, 2000; Sá, 2002; Quadros, 2004; Sacks, 2007), anthropology (Hall, 1992; Gomes, 2008), family relationships (Lacan, 1987) and autobiography (Ferraroti, 1991; Pineau, 2006; Demartini, 2008). The sign language of the deaf and educational history are also discussed in this paper. At the end are presented reports of life history made in the research field of literary form, with analyzes of testimonies collected by interviewees (deaf parents and hearing children) which showed to be son of deaf parents can be as normal as being the child of hearing parents. / Este trabalho busca apresentar as vivências de três pessoas ouvintes, além do próprio autor, filhas de pais surdos, discutindo as relações familiares entre pais e filhos, mostrando as diferenças em relação às famílias que não possuem pessoas surdas no seu âmago, desmistificando preconceitos e pré-conceitos. Devido as barreiras comunicacionais e pelo preconceito, muitos surdos acabavam sendo privados do direto de serem pais. Nos relatos apresentados nesta dissertação, houve momentos em que isso quase aconteceu na vida dos sujeitos entrevistados para esta pesquisa. Porém, com força e consciência dos direitos adquiridos, esses pais surdos não permitiram que tal coisa acontecesse. O texto inicia com a trajetória formativa e profissional do autor para, em seguida, trazer os autores que abordam temas como surdez (Wrigley, 1996; Lacerda, 1998; Perlin, 1998; Moura, 2000; Sá, 2002; Quadros, 2004; Sacks, 2007), antropologia (Hall, 1992; Gomes, 2008), relações familiares (Lacan, 1987) e autobiografia (Ferraroti, 1991; Pineau, 2006; demartini, 2008). A língua de sinais e a história educacional dos surdos também são discutidas neste trabalho. Por último, são apresentados os relatos de história de vida feitos na pesquisa de campo de forma literária, com as análises dos depoimentos colhidos pelos sujeitos entrevistados (filhos ouvintes e pais surdos) os quais evidenciam que ser filho de pais surdos pode ser tão normal quanto ser filho de pais ouvintes.

Submitted by Maike Costa (maiksebas@gmail.com) on 2017-03-27T11:21:28Z No. of bitstreams: 1 arquivototal.pdf: 6148244 bytes, checksum: b1d70d0906560dc7125c9a4bf1e59f6b (MD5) / Made available in DSpace on 2017-03-27T11:21:28Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 6148244 bytes, checksum: b1d70d0906560dc7125c9a4bf1e59f6b (MD5) Previous issue date: 2016-11-14 / The primary objective of the present study is to analyze how listeners perceive the alveolar and palatal variants of /S/ in medial coda in their speech community (i) observing if the palatal/alveolar contrast is perceived in a different way, in a numerical scale, in different following phonetic-phonological contexts; (ii) verifying if listeners from João Pessoa are aware of the behavior of the variant in their own dialect; in other words, if they perceive what variant they use in relation to several following contexts; and (iii) verifying if the listeners from João Pessoa have a dialectal identity in relation to the behavior of the fricative in coda in João Pessoa, that is, if they believe that their pronunciation corresponds to the preferred one of their speech community in relation to the analyzed process. For that, three experiments of perception were developed and applied to listeners from João Pessoa: the first one consists of a task of identifying how different would be two productions of a same word in relation to /S/ in medial coda; the second one was to choose which of the two productions sounded more similar to the way people from João Pessoa speak; and the third one was to answer which of the two productions sounded more similar to the way the speaker himself/herself speaks. The stimuli were recorded by a speaker from João Pessoa. She is an undergraduate student in the 15-25 years age group. After recording the words in isolation, the files were matched to the pairs of stimuli that were presented to listeners through the website. The statistical analyses to test the hypotheses were carried out using the software R (R Core Team, 2013) from the subjects’ answers. The most relevant results were: (a) listeners attribute the same degree of difference to the pair of fricatives independently of the following context; (b) they are aware of the fricative’s behavior of João Pessoa’s dialect; and (c) there is identification between these speakers and the dialect of their speech community regarding the palatalization of coronal fricative. In order to develop the tests and to formulate hypotheses it was took into account studies concerning acoustic characteristics of fricatives in data of production and perception (KENT & READ, 1992; JONGMAN et al., 2000; JESUS, 1999; HAUPT, 2007; FERREIRA-SILVA et al., 2015; HENRIQUE et al., 2015), data of studies that analyzed the behavior of /S/ in coda in dialects of Brazil (CALLOU; LEITE; MORAES, 2002; BRESCANCINI, 2002, 2003; HORA, 2003, 2011; RIBEIRO, 2006; LIMA, 2013; LOPES, 2012) and the framework of the theory of linguistic variation and change (WEINREICH, LABOV & HERZOG, 1968; LABOV, 1972; ECKERT, 2008, 2012). / O objetivo geral deste trabalho é analisar como os ouvintes percebem as variantes alveolar e palatal do /S/ na posição de coda medial em sua comunidade de fala (i) observando se a distinção alveolar/palatal é percebida de forma diferente, numa escala numérica, em diferentes contextos fonético-fonológicos seguintes; (ii) verificando se os ouvintes pessoenses têm consciência do comportamento da variante no seu próprio dialeto, ou seja, se percebem qual variante utilizam com relação aos diversos contextos seguintes; e (iii) verificando se os ouvintes pessoenses possuem identidade dialetal com relação ao comportamento da fricativa em coda em João Pessoa, ou seja, se acreditam que sua pronúncia corresponde à pronúncia preferencial de sua comunidade de fala no que diz respeito ao processo analisado. Para tal, três experimentos de percepção foram elaborados e aplicados a ouvintes pessoenses: o primeiro consistia em uma tarefa de identificar o quão diferente soavam as duas pronúncias de uma mesma palavra com relação ao /S/ em coda medial; o segundo, em escolher qual das duas pronúncias se parecia mais com o modo como os pessoenses falam; e o terceiro, em responder qual das duas pronúncias se parecia mais com o modo como o próprio participante falava. Os estímulos foram gravados por uma falante pessoense, universitária e que se enquadra na faixa etária de 15 a 25 anos. Após a gravação das palavras em isolado, foram montados os arquivos com os pares de estímulos que seriam apresentados aos ouvintes através da plataforma. Os testes estatísticos para a avaliação das hipóteses foram realizados com o programa R (R Core Team, 2013) a partir das respostas dos participantes. Como principais resultados, constatou-se: (a) que os ouvintes atribuem o mesmo grau de diferença ao par de fricativas independentemente do contexto seguinte; (b) que eles têm consciência do comportamento da fricativa do dialeto pessoense; e (c) que há uma grande identificação entre esses falantes e o dialeto de sua comunidade de fala em relação à palatalização da fricativa coronal. Para a elaboração dos testes e proposição das hipóteses foram levadas em consideração pesquisas envolvendo as características acústicas das fricativas em dados de produção e percepção (KENT & READ, 1992; JONGMAN et al., 2000; JESUS, 1999; HAUPT, 2007; FERREIRA-SILVA et al., 2015; HENRIQUE et al., 2015), dados de pesquisas que avaliaram o comportamento do /S/ em coda em dialetos do Brasil (CALLOU; LEITE; MORAES, 2002; BRESCANCINI, 2002, 2003; HORA, 2003, 2011; RIBEIRO, 2006; LIMA, 2013; LOPES, 2012) e o arcabouço da teoria da variação e mudança (WEINREICH, LABOV & HERZOG, 1968; LABOV, 1972; ECKERT, 2008, 2012).

In this study, seismic interferometry is used to analyze dynamic processes in the Earth’s shallow subsurface caused by environmental processes and ground shaking. In the first part of the thesis, the feasibility of a passive monitoring with ambient seismic noise at the pilot site for CO2 injection in Ketzin is investigated. Monitoring the expansion of the CO2 plume is essential for the characterization of the reservoir as well as the detection of potential leakage. From June 2008 until August 2013, more than 67000 tons of CO2 were injected into a saline aquifer at a depth of about 650 m. Passive seismic data recorded at a seismic network around the injection site was cross-correlated in a frequency range of 0.5-4.5 Hz over a period of 4 years. The frequency band of 0.5-0.9 Hz, in which surface waves exhibit a high sensitivity at the depth of the reservoir, is not suitable for monitoring purposes as it is only weakly excited. In a frequency range of 1.5-3 Hz, periodic velocity variations with a period of approximately one year are found that cannot be caused by the CO2 injection. The prominent propagation direction of the noise wave field indicates a wind farm as the dominant source providing the temporally stable noise field. This spacial stability excludes variations of the noise source distribution as a spurious cause of velocity variations. Based on an amplitude decrease associated with time windows towards later parts of the coda, the variations must be generated in the shallow subsurface. A comparison to groundwater level data reveals a direct correlation between depth of the groundwater level and the seismic velocity. The influence of ground frost on the seismic velocities is documented by a sharp increase of velocity when the maximum daily temperature stays below 0 C. Although the observed periodic changes and the changes due to ground frost affect only the shallow subsurface, they mask potential signals of material changes from the reservoir depths. To investigate temporal seismic velocity changes due to earthquake-related processes and environmental forcing in northern Chile, 8 years of ambient seismic noise recorded by the Integrated Plate Boundary Observatory Chile (IPOC) are analyzed. By autocorrelating the ambient seismic noise field, approximations of the Green’s functions are retrieved and velocity changes are measured with Coda Wave Interferometry. At station PATCX, seasonal changes of seismic velocity caused by thermal stress as well as transient velocity reductions are observed in the frequency range of 4-6 Hz. Sudden velocity drops occur at times of mostly earthquake-induced ground describing the seismic velocity variations based on continuous observations of the local ground acceleration. The model assumes that not only the shaking of large earthquakes causes velocity drops, but any small vibrations continuously induce minor velocity variations that are immediately compensated by healing in the steady state. The shaking effect is accumulated over time and best described by the integrated envelope of the ground acceleration over one day, which is the temporal resolution of the velocity measurements. In the model, the amplitude of the velocity reduction as well as the recovery time are proportional to the strength of the excitation. The increase of coseismic velocity change and recovery time with increasing excitation is confirmed by laboratory tests with ultrasound. Despite having only two free scaling parameters, the model fits the data of the shaking-induced velocity variation in remarkable detail. Additionally, a linear trend is observed that might be related to a recovery process from one or more earthquakes before the measurement period. A clear relationship between ground shaking and induced velocity reductions is not visible at other stations. The outstanding sensitivity of PATCX to ground shaking and thermal stress can be attributed to the special geological setting of the station, where the subsurface material consists of a relatively loose conglomerate with high pore volume leading to stronger nonlinearity compared to the other IPOC stations. / In dieser Studie werden mit Hilfe von seismischer Interferometrie kleinste dynamische Prozesse in der Erdkruste beobachtet, welche beispielsweise durch umweltbedingte oder anthropogene Einflüsse sowie Bodenerschütterungen hervorgerufen werden können. Im ersten Teil der Arbeit werden Änderungen in der seismischen Geschwindigkeit am Pilotstandort für CO2-Speicherung in Ketzin untersucht. In einer Tiefe von 650m wurden dort zwischen Juni 2008 und August 2013 über 67000 Tonnen CO2 eingelagert. In einem Frequenzbereich vom 0,05-4,5 Hz wurden Kreuzkorrelationen des seismischen Hintergrundrauschens an einem kleinräumigen Netzwerk über einen Zeitraum von 4 Jahren berechnet. Der Frequenzbereich zwischen 0,5 und 0,9 Hz weist eine hohe Sensitivität von Oberflächenwellen in der Tiefe des Reservoirs auf, ist aber nur sehr schwach angeregt und eignet sich deswegen nicht für die Analyse. In einem Frequenzbereich von 1,5-3 Hz zeigen sich periodische Geschwindigkeitsänderungen mit einer Periode von einem Jahr, welche nicht durch die Einlagerung von CO2 erzeugt werden können. Eine Analyse des seismischen Hintergrundrauschens zeigt, dass dieses über den gesamten Zeitraum hinweg hauptsächlich aus der Richtung eines Windparks kommt. Durch die Stabilität des Wellenfeldes können Änderungen in den Quellpositionen, welche sich in scheinbaren Geschwindigkeitsänderungen zeigen können, ausgeschlossen werden. Eine Amplitudenabnahme der Geschwindigkeitsänderungen hin zu späteren Zeitfenstern in der Coda lässt auf oberflächennahe Prozesse als Ursache schließen. Ein Vergleich zwischen den jährlichen Geschwindigkeitsänderungen mit Schwankungen im Grundwasserspiegel zeigt eine direkte Korrelation. Ein sprunghafter Anstieg in der Geschwindigkeit zeigt sich im Winter, wenn die Tageshöchsttemperaturen unter den Gefrierpunkt sinken und der Boden zufriert. Obwohl Bodenfrost und Änderungen im Grundwasserspiegel nur einen sehr oberflächennahen Bereich betreffen, so überdecken sie dennoch mögliche Signale durch die Einlagerung von CO2. Im zweiten Teil der Arbeit werden Geschwindigkeitsänderungen in Nordchile untersucht, welche durch erdbebeninduzierte Prozesse und umweltbedingte Einflüsse hervorgerufen werden. Dazu wurden über einen Zeitraum von 8 Jahren Autokorrelationen des seismischen Hintergrundrauschens des IPOC Netzwerkes (Integrated Plate Boundary Observatory Chile) berechnet und mit seismischer Interferometrie ausgewertet. An der Station PATCX können in einem Frequenzbereich von 4-6 Hz periodische Geschwindigkeitsänderungen beobachet werden, welche durch thermisch induzierte Dehnung hervorgerufen werden. Außerdem treten transiente Geschwindigkeitsabnamen nach Bodenerschütterungen auf, welche hauptsächlich von Erdbeben verursacht werden. Die seismische Geschwindigkeit kehrt daraufhin langsam wieder auf ihr vorheriges Niveau zurück. Für die Geschwindigkeitsänderungen wurde ein empirisches Modell entwickelt, welches auf Messungen der lokalen Bodenerschütterung basiert. Dabei wird angenommen, dass nicht nur große erdbebeninduzierte, sondern auch kleinste Bodenerschütterungen einen Abfall der Geschwindigkeit erzeugen, welche wiederum innerhalb kürzester Zeit durch Heilung in den Gleichgewichtszustand zurückkehrt. Dabei summieren sich die Effekte durch die Bodenerschütterungen mit der Zeit auf und werden am besten mit dem Integral der lokalen Bodenbeschleunigung über die Messwerte eines Tages beschrieben. Die Diskretisierung von einem Tag entspricht der zeitlichen Auflösung in der Messung der Geschwindigkeitsänderungen. Sowohl die Amplitude der Geschwindigkeitsabnahme als auch die Zeit bis der Gleichgewichtszustand wieder erreicht ist (Heilungszeit) werden im Modell als proportinal zur Größe der Anregung angenommen. Eine Korrelation der Heilungszeit und der Amplitude der koseismischen Geschwindigkeitsabnahme mit der Größe der Anregung konnte mit Hilfe von Laboruntersuchungen mit Ultraschall bestätigt werden. Mit nur zwei Parametern beschreibt das Modell die transienten Geschwindigkeitsänderungen in bemerkenswerter Genauigkeit. Desweiteren beinhaltet das Modell einen linearen Verlauf in den Geschwindigkeitsänderungen, welcher vermutlich durch einen Heilungsprozess hervorgerufen wird, der auf ein oder mehrere Erdbeben vor dem Messzeitraum folgte. Eine Beziehung zwischen Bodenerschütterung und Geschwindigkeitsänderung ist an anderen Stationen des IPOC Netzwerkes nicht erkennbar. Die herausragende Sensitivität von PATCX im Hinblick auf Bodenerschütterung und thermische Dehnung kann den speziellen geologischen Gegebenheiten an der Station zugeschrieben werden. Bei dem dort vorliegenden Material handelt es sich um ein relativ loses Konglomerat mit großem Porenvolumen, welches ein starkes nichtlineares Verhalten aufweist, was an anderen IPOC Stationen nicht zu erwarten ist.

Hörande barn till döva kallas med en förkortning CODA. Det är en grupp andraspråkstalare med en unik andraspråkssituation som sällan uppmärksammas. CODA har teckenspråk som förstaspråk och talat språk som andraspråk. Min undersökning avser att genom semistrukturerade intervjuer med fyra lärare undersöka huruvida CODA:s speciella språkliga situation uppmärksammas i undervisning och om de erbjuds särskild stöttning i det svenska språket. Jag undersöker också ett läromedel med lärarhandledning som används av flera av informanterna för att se om det understödjer språkutvecklande undervisning. Undersökningen analyseras genom ett sociokulturellt perspektiv och Cummins klassrumsmodell för undervisning och lärande. Resultatet visar att medvetenheten om CODA är godtycklig och att undervisningen inte är uniform men att det läromedel jag har un-dersökt understödjer språkutvecklande undervisning och i och med detta gynnas även CODA.