Applied research project (D. Min.)--School of Theology and Missions, Oral Roberts University, 2006. / Includes abstract and vita. Translated from Korean. Includes bibliographical references (leaves 196-200).

Thesis (D. Miss.)--Trinity Evangelical Divinity School, 1994. / Abstract. Includes bibliographical references (leaves 190-198).

Thesis (D. Miss.)--Trinity Evangelical Divinity School, 1994. / Abstract. Includes bibliographical references (leaves 190-198).

Thesis (D. Miss.)--Trinity Evangelical Divinity School, 1994. / Abstract. Includes bibliographical references (leaves 190-198).

Applied research project (D. Min.)--School of Theology and Missions, Oral Roberts University, 2008. / Includes abstract and vita. Translated from Korean. Includes bibliographical references (leaves 199-205).

Applied research project (D. Min.)--School of Theology and Missions, Oral Roberts University, 2008. / Includes abstract and vita. Includes bibliographical references (leaves 186-193).

L'inversion de forme d'onde complète (FWI) est un processus non-linéaire et mal posé d’ajustement de données, dans notre cas, issues d’acquisitions simiques. Cette technique cherche à reconstruire, à partir d’un modèle initial obtenu à faible nombre d’onde (faible résolution), des paramètres constitutifs contrôlant la propagation des ondes à grands nombres d’ondes (forte résolution). Durant ce processus itératif, certains artéfacts peuvent altérer la qualité du modèle reconstruit. Afin de diminuer ces artéfacts et d’assurer une reconstruction des paramètres qui soit cohérente d’un point de vue géologique, différentes techniques de pré-conditionnement ou de régularisation peuvent être proposées.Cette thèse se focalise sur le potentiel de nouveaux filtres multi-dimensionnels construits dans l’espace des nombres d’ondes et orientés suivant les structures géologiques. Une stratégie de pré-conditionnement a été mise au point à l’aide de ces filtres et a été appliquée avec succès à la problématique FWI. La formulation analytique 1D de l’opérateur inverse de covariance laplacienne (Tarantola, 2005) constitue la base de la formulation d’opérateurs de dimension supérieure qui sont validés ici en les comparants avec l’opérateur analytique de covariance laplacienne 1D. Nous avons utilisé cette fonction analytique inverse 1D comme la base de filtrage de dimension supérieure, via l’addition de multiples fonctions inverses orientées orthogonalement. Ces fonctions laplaciennes inverses additionnelles (AIL) sont obtenues pour des configurations 2D et 3D après discrétisation par des techniques de différences finies. Nous montrons que l’on peut calculer un filtre en nombre d’onde de manière rapide et robuste en résolvant le système linéaire associé à ces opérateurs inverses. Lorsque des pentes sont inclues à l’étape de discrétisation par différences finies, il est alors possible d’utiliser ces opérateurs comme des filtres en nombre d’ondes orientés vers les structures géologiques, ceci avec une grande efficacité.Ce filtre (AIL) montre des propriétés rapides de convergence et des performances indépendantes du vecteur à filtrer. Nous montrons notamment comment ce filtre peut être utilisé comme un opérateur utile pour le gradient associé à la FWI. Le pré-conditionnement du gradient peut atténuer les effets du problème mal-posé qui vont s’étendre dans l’espace des modèles. Deux exemples synthétiques (Valhall et Marmousi) calculés dans l’espace des fréquences sont proposés dans cette thèse. Le pré-conditionnement AIL s’avère efficace pour atténuer d’une part la signature mal-posée provenant de la présence de bruit ambient dans les données observées et d’autre part d’artéfacts liés aux effets de repliement spatial liés aux conditions d’imagerie par FWI. La possibilité d’inclure des pentes permet de filtrer de manière préférentielle en considérant des pendages géologiques. Cette stratégie de filtrage permet l’atténuation d’artéfacts, tout en préservant le contenu en nombre d’ondes de la stratigraphie orthogonale au pendage.Un cas réel d’inversion 2D FWI est finalement abordé permettant tout d’abord d’illustrer la sensibilité des résultats d’inversion au modèle initial. Celui-ci est d’importance majeure, particulièrement dans les régions profondes dépassant la pénétration maximale des ondes transmises. L’application de la technique FWI à cette acquisition sismique a permis d’améliorer de manière significative la cohérence sur une image migrée par renversement du temps (RTM). Nous montrons également que le pré-conditionneur AIL permet une décroissance significative du nombre de tirs requis à modéliser dans la boucle d’inversion, sans pour autant dégrader le contenu en nombre d’onde des structures géologiques principales dans les résultats finaux obtenus après inversion. / Full waveform inversion (FWI) is a non-linear, ill-posed, local data fitting technique. FWI looks to moves from an initial, low-wavenumber representation of the earth parameters to a broadband representation. During this iterative process a number of undesirable artifacts can map into our model parameter reconstruction. To mitigate these artifacts and to ensure a geologically consistent model parameter reconstruction, various preconditioning and/or regularization strategies have been proposed.This thesis details the construction of new, efficient, multi-dimensional, structurally-orientated wavenumber filters. A preconditioning strategy has been devised using these filters that we have successfully applied to FWI. The 1D analytical inverse Laplacian covariance operator (Tarantola, 2005) forms the basis of higher dimensional operators and is initially validated by comparing to the 1D analytical Laplacian covariance operator. We use this analytical 1D inverse function as the basis for higher dimensional filtering via the addition of multiple, orthogonally orientated inverse functions. These additive inverse laplacian functions (AIL) are shown in 2D and 3D configurations and are discretized using finite-difference techniques. We show that one can calculate, a rapid and robust wavenumber filter, by solving the linear system associated with these inverse operators. When dip is included at the finite difference discretization stage, it is possible to use these operators as highly efficient, structurally orientated wavenumber filters.The AIL filter is shown to be rapid to converge and its performance is independent of the vector to be filtered. We show, that the filter can be a useful preconditioning operator for the FWI gradient. Preconditioning the gradient can mitigate against ill-posed effects mapping into the model-space. Two synthetic (Valhall and Marmousi) frequency domain FWI example are shown in this thesis. The AIL preconditioner has success at mitigating the ill-posed imprint coming from ambient noise in the observed data and also artifacts from spatial aliasing effects in the FWI imaging condition. The ability to include dip, allows one to preferentially filter along geological dip. This filtering strategy allows the mitigation of artifacts, while simultaneously preserving the stratigraphic based wavenumber content that is orthogonal to dip.A 2D, real data FWI case-study is also shown and we highlight the sensitivity of the inversion result to the initial model. The initial model is of key importance, this especially true in the areas deeper than the maximum penetration of transmitted waves. The application of FWI on this line is able to significantly improve gather alignment on a RTM, migrated image. We also see that the AIL preconditioner can allows us to significantly decrease the number of shot records we are required to model in our inversion workflow without degrading the key geological wavenumber content in the final inversion result.

Title: The source process of Greek earthquakes Author: Dana K ížová Department: Department of Geophysics Supervisor of the doctoral thesis: Prof. RNDr. Ji í Zahradník DrSc., Department of Geophysics Abstract: Investigations of moment tensor (MT) and its uncertainty are topical. This thesis is focused on isotropic component of three shallow earthquakes: Event A in Cretan Sea (Mw 5.3) and two events near Santorini island, B (Mw 4.9) and C (Mw 4.7). MT is inverted from full waveforms in an assumed 1D velocity model. The inverse problem is non-linear in centroid depth and time, and linear in six MT parameters, one is the MT-trace. Uncertainty of isotropic component is studied by a new approach (K ížová et al., 2013). The trace is systematically varied, and remaining parameters are optimized. The method reveals tradeoffs between the isotropic component, depth, time, and focal mechanism. From two existing velocity models, we prefer the one with lower condition number, in which a (positive) isotropic component is indicated for event B. To rapidly assess a likely existence of isotropic component, an empirical method is proposed (K ížová et al., 2016). It is based on comparison between depth- dependences of waveform correlation in full and deviatoric modes. Based on extensive synthetic tests, the method confirms a...

Submitted by Carlos Alberto Pereira (caalpereira@terra.com.br) on 2018-09-05T10:50:59Z No. of bitstreams: 1 Tese_Carlos Alberto Pereira_RA21416-2.pdf: 2930270 bytes, checksum: 48b2473ff976ecef214a015b8409fe34 (MD5) / Approved for entry into archive by Lucilene Cordeiro da Silva Messias null (lubiblio@bauru.unesp.br) on 2018-09-05T13:45:57Z (GMT) No. of bitstreams: 1 pereira_ca_dr_bauru.pdf: 2790378 bytes, checksum: 830d82e49c455dfd2b7e00b1f683ffe6 (MD5) / Made available in DSpace on 2018-09-05T13:45:57Z (GMT). No. of bitstreams: 1 pereira_ca_dr_bauru.pdf: 2790378 bytes, checksum: 830d82e49c455dfd2b7e00b1f683ffe6 (MD5) Previous issue date: 2018-05-30 / No Brasil, recentemente, iniciativas diversificadas foram propostas para a implantação de escolas públicas de tempo integral. Em 2012, o governo do estado de São Paulo criou o Programa Ensino Integral (PEI/SEE/SP), incialmente destinado às escolas de ensino médio. A formação continuada de professores é compreendida como premissa para a implantação desse novo modelo de escola, para que as inovações do modelo pedagógico sejam garantidas. Na literatura, são identificados diferentes modelos de formação continuada, dentre eles, o modelo de desenvolvimento profissional de inovação curricular e organizacional, que se baseia em pressupostos como um currículo que suscite, nos professores, a necessidade de aprendizagem de conteúdo, estratégia didática e avaliação, além da ideia de que os professores devem atuar em questões relativas ao seu trabalho e adquirir competência no aperfeiçoamento. Nesse sentido, este estudo teve como objetivo analisar as ações de formação continuada do Programa de Ensino Integral de São Paulo para professores de Biologia, buscando identificar a sua aproximação com o modelo de desenvolvimento profissional de inovação curricular. O processo investigativo constituiu-se numa pesquisa qualitativa, de caráter avaliativo, e a coleta de dados foi realizada por meio da análise de documentos, de questionários e de entrevistas com todos os professores da área de Biologia de todas as quatro escolas de ensino médio integral de uma cidade do interior paulista. Para a análise dos dados, foi utilizado o método de análise de conteúdo. Os resultados permitem afirmar que as ações de formação continuada oferecidas aos professores de Biologia das escolas em questão não se baseiam nos princípios de mudança curricular de desenvolvimento profissional, porém, possibilitam que esses docentes desenvolvam atividades pedagógicas de forma mais diversificada e elaborada. Em relação ao ensino de Biologia, não houve um trabalho com discussões que fossem além das propostas pelo Caderno do Professor do Ensino Médio de Pré-Iniciação Científica, nem uma adequação dos materiais didáticos ao jovem, ou uma adequação didática para desenvolvimento em grupo, com diferentes abordagens de conceitos biológicos, de forma crítica e interdisciplinar, para resoluções de problemas de contextos reais. / In Brazil, recently, diversified initiatives were proposed to the implantation of full time public schools. In 2012, the government of São Paulo created the Ensino Integral (full time teaching) (PEI/SEE/SP) program, initially designated to high schools. The teachers continued graduation is comprehended as a necessary premise to the implantation of this new school model, so that it guarantees the innovations of the pedagogical model. In literature, are identified different continued graduation models and among them, the model of professional development of curricular and organizational innovation, that is based on assumptions as a curriculum which generates necessities to the teachers of learning content, didactic strategy and evaluation and where the teachers act in issues related to their work and may acquire competence in furthering. This study aims to analyze the continued graduation of the full time teaching program of biology teachers, seeking to identify its relation to the professional development model of curricular innovation. The investigative process was constituted by a qualitative research, of evaluative nature and the collect of datas were performed by the analysis of the documents, questionnaires and of interviews with all the teachers of biology area and all four full high school institutions in the upstate of São Paulo city. To the analysis of data, a method of content analysis was used. The results allow to affirm that the actions of continued graduation offered to biology teachers of the state education network of full time high schools investigated don’t measure to the principles of curricular changing of professional development, however, they opened the possibility to develop pedagogical activities in a diversified and elaborated way. About the biology, there was not a thematic work so that it would include discussions that would go beyond the high school teacher's book of scientific pre-initiation, adequacy of teaching materials for development in group with different approaches of biological concepts in a critical form and interdisciplinary to resolutions of problems in a real context.

Shingled Magnetic Recording (SMR) technology is important in the immediate need for expansion of magnetic hard disk beyond the limit of current disk technology. SMR provides a solution with the least change from current technology among contending technologies. Robust easy to implement Digital Signal Processing (DSP) techniques are needed to achieve the potentials of SMR. Current DSP techniques proposed border on the usage of Two Dimensional Magnetic Recording (TDMR) techniques in equalisation and detection, coupled with iterative error correction codes such as Low Density Parity Check (LDPC). Currently, Maximum Likelihood (ML) algorithms are normally used in TDMR detection. The shortcomings of the ML detections used is the exponential complexities with respect to the number of bits. Because of that, reducing the complexity of the processes in SMR Media is very important in order to actualise the deployment of this technology to personal computers in the near future. This research investigated means of reducing the complexities of equalisation and detection techniques. Linear equalisers were found to be adequate for low density situations. Combining ML detector across-track with linear equaliser along-track was found to provide low complexity, better performing alternative as compared to use of linear equaliser across track with ML along track. This is achieved if density is relaxed along track and compressed more across track. A gain of up to 10dB was achieved. In a situation with high density in both dimensions, full two dimensional (2D) detectors provide better performance. Low complexity full 2D detector was formed by serially concatenating two ML detectors, one for each direction, instead of single 2D ML detector used in other literature. This reduces complexity with respect to side interference from exponential to linear. The use of a single bit parity as run length limited code at the same time error correction code is also presented with a small gain of about 1dB at BER of 10^-5 recorded for the situation of high density.