The thesis comprises two parts. In the first part, we investigate various cohomological aspects of hypercomplex manifolds and analyse the existence of special metrics. In the second part, we define Seiberg-Witten equations on the leaf space of manifolds which admit a Riemannian foliation of codimension four. / Doctorat en Sciences / info:eu-repo/semantics/nonPublished

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<p dir="ltr">Process monitoring of additive manufacturing (AM) allows users to ensure part quality while reducing costs associated with non-conformances. A wide range of issues can occur during an AM process, but several which are most critical are thermal and geometric errors. While various strategies exist to detect and correct these errors, most rely on a single type of sensor. In contrast, multimodal sensing can provide a more comprehensive monitoring method for AM by detecting a broader range of errors. To fuse three dimensional (3D) and thermal data, an infrared (IR) camera and 3D scanning system must be calibrated. Structured light (SL) 3D imaging offers a fast and accurate solution for collecting 3D data, and these systems are typically calibrated using a printed checkerboard or circular pattern. This approach works well for visible light cameras, but without external heating the calibration target has a uniform temperature and its features cannot be detected by an IR camera. Existing calibration solutions create thermal features by using external heating sources, arrays of small heated points, or temperature masks to cover a heated background, but each has its own limitations. This thesis presents a novel method which uses a fused filament fabrication (FFF) 3D printer to create an array of short cylinders, imitating the circles on a traditional calibration board and heating the print bed to create a thermal gradient. This target is used to estimate the intrinsic parameters of the IR camera along and perform an extrinsic calibration with a SL 3D scanner. Thermal and 3D data are then fused together using a Gaussian weighting algorithm, and an occlusion method filters any 3D points not visible to the IR camera. Additionally, a method for assigning thermal data to ideal G-code points using only an IR camera is presented. Experimental results show that these methods can accurately register temperature data to corresponding 3D data points, providing process monitoring for AM. Additionally, the mapping process occludes points where no temperature data is available, and the system is capable of detecting a subsurface void using thermal data. This process achieves multimodal data fusion for AM process monitoring while offering an integrated solution for calibrated an IR camera. </p>

Cette thèse a pour but d'étudier une nouvelle décharge nanoseconde pulsée à barrière diélectrique basée sur 3 électrodes (SL-DBD pour « SLiding DBD » en anglais), de la comparer à la décharge nanoseconde conventionnelle utilisant 2 électrodes (NS-DBD), et d'évaluer sa capacité à être utilisée soit comme capteur de vitesse pariétale, soit comme actionneur électromécanique pour le contrôle d'écoulement. Dans la première partie, les propriétés électriques des deux décharges sont caractérisées, permettant ainsi d'identifier le paramètre électrique clé qui permet de passer d'un régime de décharge à un autre. Des visualisations par caméra intensifiée ont confirmé cette transition lorsque le champ électrique moyen devient supérieur à 6.5 kV/cm. Des diagnostiques mécaniques (Schlieren et mesures de pression) ont permis de caractériser précisément l'onde de pression générée par les deux décharges.Ensuite, l'influence d'un écoulement sur le comportement électrique de la SL-DBD a été étudiée, mettant en évidence que le courant « collecté » par l'électrode (3) était à peu près proportionnel à la vitesse de l'écoulement en proche paroi. Même s'il reste encore de nombreux points à vérifier, ce résultat encourageant permet d'envisager l'utilisation de la SL-DBD comme capteur de vitesse et/ou de frottement pariétal.Enfin, la troisième partie est consacrée à l'effet de la SL-DBD sur des écoulements aérodynamiques, dans le but de les manipuler. Plusieurs configurations ont été étudiées (profil d'aile, marche descendante, plaque plane) et les résultats ont permis de montrer la complexité des phénomènes physiques à l'origine du contrôle, sans pour autant pouvoir totalement les expliquer. / This thesis aims to study new design of nanosecond pulsed dielectric barrier discharge in 3 electrodes configuration: the sliding discharge (SL-DBD), to compare it to the conventional nanosecond DBD in 2 electrodes geometry (NS-DBD) and to show also its capacity to be used as a friction velocity or wall shear stress sensor and to be used as electromechanical actuator for flow control.In its first part, the electrical properties of these two discharges are characterized and point out the key parameter governing the transition of one regime to another. The visualizations with an intensified camera confirm this transition when the mean electric field increases over 6.5 kV/cm. Therefore they extend further and cover the inter-electrode gap. Mechanical diagnostics (Schlieren and pressure measurements) characterize the pressure wave generated by these discharges. In the second part, the electrical characterization of the SL-DBD under flow conditions shows that the courant « collected » by the third electrode is almost proportional to the wall flow velocity. However, even if other studies needed to be performed, these encouraging results reveal the ability of the SL-DBD to be used as a friction velocity or a wall shear stress sensor. Finally, the third part is addressed to the effect of the SL-DBD on aerodynamics flows in order to manipulate them. Several configurations are studied (airfoil, backward facing step, flat plate) and the results have shown the complexity of the physicals phenomena governing the control authority, without being able to fully explain them.

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Background Recently, Taiwan has been faced with the migration of numbers of women from Southeast Asian (SEA) countries. It was estimated that the aggregate number of SEA wives in Taiwan was more than 131,000 in 2007 (Ministry of Foreign Affairs, 2006).These women are often colloquially called, “foreign brides” or “alien brides”; most of them are seen as commodities of the marriage trade, whose marriages are arranged by marriage brokers. Some women can be regarded as being sold for profit by their families. These young Vietnamese immigrant women come to Taiwan alone, often with a single suitcase, and are culturally and geographically distinct from Taiwanese peoples; the changes in culture, interpersonal relationships, personal roles, language, value systems and attitudes exert many negative impacts on their health, so greater levels of acculturation stress can be expected. This particular group of immigrant women are highly susceptible and vulnerable to health problems, due to language barriers, cultural conflicts, social and interpersonal isolation, and lack of support systems. The aims of this study were to examine the relationships between acculturation and immigrantspecific distress and health outcomes among Vietnamese transnational married women in Taiwan. This study focuses on Vietnamese intermarriage immigrants, the largest immigrant group in the period from1994 through to 2007. Methodology The quantitative study was divided into two phases: the first was a pilot study and the second the main study. This study was conducted in a communitybased health centre in the south of Taiwan, targeting Taiwanese households with Vietnamese wives, including the Tanam, Kaohsiung, and Pentong areas. This involved convenience sampling with participants drawn from registration records at the Public Health Centre of Kaohsiung and used the snowball technique to recruit 213 participants. The instruments included the following measures: (1) Socio-demographic information (2) Acculturation Scale (3) Acculturative Distress Scale, and (4) HRQOL. Questions related to immigrant women’s acculturation level and health status were modified. Quantitative data was coded and entered into the SPSS and SAS program for statistical analysis. The data analysis process involved descriptive, bivariate, multivariate multiple regression, and classification and regression trees (CART). Results Six hypotheses of this study were validated. Demographic data was presented and it revealed that there are statically significant differences between levels of acculturation and years of residency in Taiwan, number of children, marital status, education, religion of spouse, employment status of spouse and Chinese ethnic background by Pearson correlation and Kendall’s Tau-b or Spearman test. The correlations of daily activity, language usage, social interaction, ethnic identity, and total of acculturation score with DI tend to be negatively significant. In addition, the result of the one-way ANOVA supported the hypothesis that the different types of acculturation had a differential effect on immigrant distress. The marginalized group showed a greater immigrant distresses in comparison with the integrated group. Furthermore, the comparison t-test revealed that the Vietnamese immigrant women showed a lower score than Taiwanese women in HRQOL. The result showed higher acculturative stress associated with lower score of HRQOL on bodily pain, vitality, social functioning, mental health, and mental component summary. The CART procedure to the conclusion that the predictive variables for the physical component of the SF-36 (PCS) were: alienation, occupation, loss, language, and discrimination (predicted 28.8% of the total variance explained). The predictive variables for the mental component of the SF-36 (MCS) were: alienation, occupation, loss, language, and novelty (predicted 28.4% of the total variance explained). Conclusion As these Vietnamese immigrant women become part of Taiwanese communities and society, the need becomes apparent to understand how they acculturate to Taiwan and to the health status they acquire. The findings have implications for nursing practice, research, and will assist the Taiwanese government to formulate appropriate immigrant health policies for these SEA immigrant women. Finally, the application of this research will positively contribute to the health and well being of thousands of immigrant women and their families.

Made available in DSpace on 2016-08-03T12:19:56Z (GMT). No. of bitstreams: 1 Silas Cardoso2.pdf: 1303036 bytes, checksum: 6bfbab99f1aee463f9c257e694559274 (MD5) Previous issue date: 2015-05-25 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / The research aims the Torah as an aniconic cultic object in the postexilic, revealing its ritualistic face in the Ancient Israel worship. It is proposed that the centralization of Torah in the Second Temple Period will be an ideological and macrostructural construction i.e., an invented tradition of the post-exilic priesthood that aims to unify the nation that rebuild itself. For that analysis, three cuts related to the question are persecuted: (1) the cult materiality in its continuities and ruptures with the pre-exilic Israelite religion, from the material culture and biblical analysis of four central cultic objects presented in the Deuteronomistic History, bamah, massebah, Asherah and Ark; (2) the redactional practices that defend the Torah centralization that inspires in the other cults of Ancient Israel, especially observed in the exegetical analysis of Ps 19, one of the major Torah Psalms of the Hebrew salter; (3) the canonical texts editing that was legitimator retroprojected visions of the posterior and centralized vision of Torah, from the creation of a text materiality typology, from the exegetical analysis of the texts. With that environment we propose a model of four instances of construction of post-exilic aniconism, centralized on Torah and reaching the different layers from judahite religion. / A pesquisa trabalha a Torá como objeto de culto anicônico no pósexílio, apresentando sua face ritualística no culto do Israel Antigo. É proposto que a centralização da Torá no período do Segundo Templo seria uma construção ideológica macroestrutural i.e., uma tradição inventada do grupo sacerdotal pós-exílico em vista de unificar a nação que se reconstruía e reconfigurava. Para tal análise, observam- se três recortes distintos ligados à questão: (1) a materialidade do culto em suas continuidades e rupturas com a religião israelita pré-exílica, a partir da análise da cultura material e da análise da literatura bíblica de quatro objetos cúlticos centrais da OHD, bamah, massebah, Asherá e arca; (2) as práticas redacionais que advogavam a centralização da Torá com inspiração nos demais cultos e concepções do divino no Antigo Israel, especialmente observada na análise exegética do Sl 19, como um dos principais Salmos da Torá que teriam sido produzidos no período para promulgar a nova prática; e (3) a editoração dos diversos textos canônicos que teriam sido retroprojeções legitimadores da visão posterior centralizadora da Torá, através da criação de uma tipologia da materialidade dos textos e da Torá advinda da análise exegética de diversos textos. Com tal panorama, sob pesquisa exegética de orientação histórico-crítica, é proposto um modelo de quatro instâncias de construção do aniconismo pós-exílico, centralizado na Torá e atingindo as diferentes camadas da religião judaíta.