The main idea of the dissertation is the question, what happens to a person when leaving boundaries of his cultural background. The theoretical part of the thesis presents the previous views on the acculturation and the gradual development of the reflections on the process of acculturation. Considering the individual conditions that can contribute to successful acculturation, the use of personality characteristics seems to be limiting and inadequate. Thus, the concept of competencies is introduced as a more relevant approach for research and applied psychology of acculturation. At the same time, family acculturation is presented in its conditions, strategies and results. Only limited attention in psychological research has been dedicated to this domain so far. The empirical part of the thesis further elaborates on the theoretical overview and deals with the question what distinguishes the successful humanitarian workers at the mission abroad in the organization People in need from those who fail and what role in this specific context the family, close personal relationships and social networks play. As a part of the study, there is a demonstration of the individual steps that can be taken when working with competencies outside of the specific case study and the presentation of a specific competence...

Dans un contexte de réduction des émissions de CO2 dans les systèmes industriels et d’amélioration de leur efficacité énergétique, les chauffages par induction répondent à ces critères. Le procédé consiste à plonger un corps conducteur d’électricité dans un champ magnétique variable, induisant ainsi des courants au sein de la pièce qui se met alors à chauffer par effet Joule. Cette technologie présente l’avantage d’atteindre des températures élevées de manière précise et rapide, sans contact avec la source d’énergie. Si aujourd’hui le contrôle de tels procédés passe par la structure mécanique du chauffage, de nombreuses études ont montré que l’association de plusieurs bobines alimentées par des systèmes d’électronique de puissance fournit une souplesse dans le contrôle des profils de température et une flexibilité vis-à-vis des pièces traitées. Ce travail présente deux systèmes de chauffage par induction. Le premier est un prototype réalisé par EDF considérant trois inducteurs alimentés par trois onduleurs à résonance. Nous nous y intéresserons plus particulièrement par la suite. Le second, en cours de réalisation, met en jeu six inducteurs pour du chauffage au défilé. Leurs caractéristiques, leurs alimentations et leurs fonctionnements sont abordés pour ensuite mettre en place deux modélisations des phénomènes électriques, l’une sous forme de fonctions de transfert, la seconde dans l’espace d’état. L’objectif final est le développement d’une alimentation auto-adaptative capable de contrôler en temps réel le profil de puissance injecté dans les pièces à chauffer afin d’atteindre un profil de température requis avec le minimum d’énergie consommée. L’étude se poursuit avec un inventaire des solutions existantes en termes de commande en boucle ouverte et en boucle fermée des systèmes mono-inducteurs, ainsi que des travaux, plus rares, pour les chauffages multi-inducteurs. De plus, des études ont montré que le contrôle de la température à la surface d’une pièce à chauffer passait par le contrôle des courants dans les inducteurs, en amplitude mais également en phase. C’est pourquoi nous proposons des lois de commande pour asservir les courants dans les inducteurs. Une routine d’optimisation fournit les amplitudes et les phases des courants dans les trois inducteurs permettant d’obtenir le profil de température le plus proche d’un profil de référence. Nous l’avons modifiée de façon à tenir compte de solutions énergétiquement optimisées en intégrant les pertes dans les interrupteurs et les inducteurs. Deux lois de commande originales sont proposées. La première étudie une commande robuste dans l’espace d’état par placement de vecteurs propres. La seconde met en jeu des correcteurs résonants qui confèrent à la boucle du système un module de gain infiniment grand à la fréquence de résonance de sorte qu’ils effacent les effets des perturbations agissant à cette même fréquence. Les méthodes de synthèse de ces correcteurs sont échantillonnées avec un très faible rapport fréquence d’échantillonnage/fréquence de résonance ; les performances sont détaillées et analysées pour le prototype à trois inducteurs. Pour tester plus facilement et valider en partie les lois mises en place, un simulateur analogique a été conçu, sorte d’émulateur reproduisant le comportement des courants dans les inducteurs et des tensions à leurs bornes. Il se base sur la modélisation sous forme de fonctions de transfert et ne comprend donc pas d’onduleur. Par l’intermédiaire d’une carte dSPACE intégrant un DSP, nous avons implanté et validé les deux lois de commande robustes sur le simulateur analogique. Par la suite, pour se rapprocher du système réel, nous avons mis en place une commande rapprochée transformant les trois signaux de commande en sortie des correcteurs vers les rapports cycliques des douze interrupteurs des convertisseurs alimentant les inducteurs. Cette étape a été validée par des essais expérimentaux réalisés en parallèle de nos études. / In the context of reducing carbon dioxide emissions in industrial systems and improving their energy efficiency, induction heaters meet these criteria. The method consists in immersing an electrically conductive body in a variable magnetic field, inducing currents within the piece which then begins to heat by Joule effect. This technology has the advantage of reaching high temperatures accurately and quickly, without contact with the power source. Today the control of such works with mechanical structures. But many studies have shown that the combination of several coils supplied by electronic power systems provides flexibility in controlling temperature profiles and flexibility towards the treated parts. This paper presents two systems of induction heating. The first is a prototype made by EDF considering three inductors supplied by three resonant inverters. We will focus more specifically later on this prototype. The second one, in progress, involves six inductors for scrolling heating. Their characteristics, their power supplies and their functions are discussed and then set up two models of electric phenomena, one form of transfer functions and one form in the state space. The final objective is the development of a self-adaptive power able to control real-time power profile injected into parts of heating to achieve a temperature profile required with minimum energy consumption. The study goes on with a list of existing solutions in terms of open-loop control and closed-loop control for single inductor system, as well as few rarer works for multi-inductors heaters. In addition, studies have shown that control of the surface temperature of the piece to be heated passes by the control of currents in the inductors, in magnitude but also in phase. That is why we propose control laws for controlling inductor currents. An optimization routine provides the magnitudes and phases of the currents in the three inductors to obtain the temperature profile closer to a reference profile. We modified it to take into account energy optimized solutions by integrating the losses in the switches and inductors. Two original control laws are proposed. The first one studies a robust control in the state space by placing eigenvalues and eigenvectors. The second one involves resonant markers that give the system loop gain module infinitely large at the resonant frequency so that they erase the effects of disturbances acting at the same frequency. The methods of synthesis of these markers are sampled with a very low sampling frequency / resonant frequency ratio; performance are detailed and analyzed for the prototype with three inductors. So as to test and validate easily some of the studied laws, an analog simulator was designed, a kind of an emulator, which reproduces the behaviour of the currents in the coils and the voltages at their terminals. It is based on the transfer function model and therefore does not include inverters. Through a dSPACE card integrating a DSP, we have implemented and validated the two robust control laws on the analog simulator. Thereafter, in order to be closer to the real system, we have established a close control which turns the three control signals toward the duty cycles of the twelve switches of the converters supplying the inductors. This step was validated by experimental tests carried out in parallel with our studies.

La découverte de nombreuses planètes extrasolaires depuis 1995 est une source d’inspiration pour les modèles de formation et évolution des systèmes solaires. Une fraction de ces planètes ont un demi-grand axe inférieur à 0.1 UA; une planète qui migre à proximité de son étoile subit donc d’abord un fort vent solaire et, après son entrée dans la magnétosphère stellaire, un fort champ magnétique. Nous étudions séparemment l’interaction entre ces planètes et la composante périodique et indépendente du temps du champ magnétique dipolaire stellaire. L’interaction périodique est associée à des courants induits confinés dans la planète. Nous étudions deux effets qui pourraient augmenter le moment angulaire d’une planète gaseuse géante qui migre vers son étoile: un torque de Lorentz qui transferre du moment angulaire de la rotation de l’étoile vers l’orbite de la planète et une perte de masse induite par la dissipation ohmique dans la planète qui peut donner du moment angulaire à la planète lorsque cette masse est accrétée sur l’étoile. Nous modellisons l’interaction indépendente du temps comme un modèle d’inducteur unipolaire, dans lequel le courant induit circule dans une boucle fermée formée par la planète, le flux de tube, et le pied du flux de tube dans l’atmosphère stellaire. Nous calculons de fa con cohérente la dissipation ohmique dans la planète et le pied du flux de tube ainsi que le couple de Lorentz. Nous utilisons alors ce modèle pour expliquer l’aspect enflé de certaines planètes géantes. Finalement, nous suggérons que ce modèle permettrait également d’estimer la conductivité électrique des super-Terres qui interagissent magnétiquement avec leur étoile. / The numerous and diverse extrasolar planets detected since 1995 provide much inspiration for planetary astrophysics. A fraction of these extrasolar planets orbit their host stars at semi-major axes less than 0.1 AU; a planet which has migrated toward its host star would thus first encounter a strong magnetized wind and, as it enters the stellar magnetosphere, strong magnetic fields. We model the interaction of such a close-in extrasolar planet with the dipolar magnetic field of its host star and study separately the time-dependent and independent components. The time-dependent interaction gives rise to Eddy currents confined in the planet. We investigate two effects that may transfer angular momentum to a planet approaching its host TTauri star through type II migration: a Lorentz torque that transfers angular momentum from the stellar spin to the planetary orbit and a mass loss induced by the ohmic dissipation in the planet, which may transfer angular momentum to the planet as the gas is accreted onto the star. We model the time-independent interaction with the unipolar inductor model, which allows the current induced in the planet to flow along a closed loop constituted by the planet, the flux tube, and its footprint on the stellar atmosphere. We self-consistently calculate the ohmic dissipation in the planet and the star and the associated Lorentz torque. We then suggest that the ohmic dissipation may provide the extra energy needed to explain some planets with inflated radii. Finally, we propose that the model may also be used to remotely infer the electric conductivity of the outer layers of super-Earths interacting magnetically with their host stars.

Made available in DSpace on 2015-05-08T14:53:38Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 7900350 bytes, checksum: fbca2db827307d8c3ed2a1c15067d0da (MD5) Previous issue date: 2014-02-13 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / This research deals with the Close-Enough Traveling Salesman Problem, a variant of the Traveling Salesman Problem wich has several applicatios in logistics. In the Close-Enough Traveling Salesman Problem, rather than visiting the vertex (customer) itself, the salesman must visit a specific region containing such vertex. To solve this problem, we propose a simple yet effective exact algorithm, based on Branch-and-Bound and Second Order Cone Programming. The proposed algorithm was tested in 824 instances suggested in the literature. Optimal solutions are obtained for open problems with up to a thousand vertices. We consider both instances in the two- and three-dimensional space. / Esta pesquisa trata do Problema do Caixeiro Viajante Suficientemente Próximo, uma variante do Problema do Caixeiro Viajante que possui diversas aplicações em logística. No Problema do Caixeiro Viajante Suficientemente Próximo, ao invés de visitar o próprio vértice (cliente), o caixeiro deve visitar uma região especifica contendo este vértice. Para resolver este problema, é proposto um algoritmo exato, simples e efetivo, baseado em branch-and-bound e Programação Cônica de Segunda Ordem. O algoritmo proposto foi testado em 824 instâncias sugeridas na literatura. Soluções ótimas foram obtidas para instâncias com até mil vértices. Foram consideradas instâncias nos espaços bi e tridimensional.

Orientador: Ronaldo Aloise Pilli / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Química / Made available in DSpace on 2018-08-08T12:16:22Z (GMT). No. of bitstreams: 1 Riston_JoseRoberto_M.pdf: 1975890 bytes, checksum: 83dd322a0b88c53adac5195340f43a5f (MD5) Previous issue date: 2006 / Resumo: Este trabalho trata de estudos visando à síntese estereosseletiva do alcalóide 275A (18, Figura 1). Esse alcalóide foi isolado por Daly e colaboradores da pele de pequenas rãs venenosas neotropicais da família Dendrobatidae em 1986. Sua estrutura possui um núcleo 1-azabiciclo[5.3.0]decano de grande importância sintética. Para construção desse núcleo utilizamos, principalmente, as reações de a-amidoalquilação e de metátese de olefinas de fechamento de anel (RCM), tendo como reagente inicial a (S) prolina (57) Esquema1 / Abstract: This work consists in studies toward the stereoselective synthesis of alkaloid 275A (18, Figure 1). This alkaloid was isolated by Daly and co-workers from the skin of neotropical poison little frogs of Dendrobatidae family in 1986. His structure has an 1-azabicyclo[5.3.0]decane nucleus of great synthetic importance. To construct this nucleus we used, mainly, a-amidoalkylation reactions and ring close metathesis (RCM), starting with (S) proline (57, Scheme 1) / Mestrado / Quimica Organica / Mestre em Química

Submitted by Josimara Dias Brumatti (bcgdigital@ndc.uff.br) on 2017-04-03T17:27:31Z No. of bitstreams: 1 TESE_com_ficha_catalografica (1).doc.pdf: 1147180 bytes, checksum: e666ba9c6f99df77bc47cae176d7d32a (MD5) / Approved for entry into archive by Josimara Dias Brumatti (bcgdigital@ndc.uff.br) on 2017-04-03T17:35:17Z (GMT) No. of bitstreams: 1 TESE_com_ficha_catalografica (1).doc.pdf: 1147180 bytes, checksum: e666ba9c6f99df77bc47cae176d7d32a (MD5) / Made available in DSpace on 2017-04-03T17:35:17Z (GMT). No. of bitstreams: 1 TESE_com_ficha_catalografica (1).doc.pdf: 1147180 bytes, checksum: e666ba9c6f99df77bc47cae176d7d32a (MD5) / Esta pesquisa tem como foco a construção do humor na interação em encontros sociais de um grupo de amigos. O objetivo deste trabalho é o de explorar a complexidade e ambivalência do humor em relações marcadas pela proximidade e afeto. Partindo-se do pressuposto de que o humor conversacional é um fenômeno relacional e colaborativo que depende do conhecimento de normas do grupo e é gerado pela possível quebra de expectativa com relação a esquemas de conhecimento, buscou-se descrever como são organizadas as sequências humorísticas e identificar que tipos de humor emergem na conversa e que funções esse humor exerce no contexto em estudo. Através de uma abordagem interacional da comunicação humorística e das contribuições da Análise da Conversa, verificamos que as sequências humorísticas se constituem de outras sequências envolvendo quem caça ou deixa um gatilho para o humor e, em alguns casos, outros participantes que alimentam o que disparou o humor. Em termos de tipos de humor, foram identificados a ironia, o humor fantasioso (Hay, 2001), a zombaria jocosa (Haugh, 2010; Haugh e Bousfield, 2012) e o abuso jocoso (Hay, 1994; Haugh, 2010; Haugh e Bousfield, 2012). Com relação ao humor fantasioso, propusemos duas categorias: o humor fantasioso exagerado e o humor fantasioso absurdo. Ambos envolvem o estabelecimento conjunto de um mundo imaginário com sua própria lógica, com regras irracionais e absurdas que não se aplicam ao mundo real (Hay, 2001), mas o primeiro categoriza-se pela construção conjunta de um mundo conhecido pelos participantes, e o segundo de um mundo nonsense. Evidenciamos que as zombarias jocosas podem ser direcionadas ao self de um dos participantes do grupo ou podem ser híbridas, tendo como alvo o self, uma terceira pessoa, ou um objeto. Quanto às funções, destacamos o entretenimento como função principal do humor no grupo. Como funções secundárias, estão: i) a de guardião das relações interpessoais em momentos de potencial conflito, e ii) a função de ameaça às relações quando algum aspecto do self é considerado sagrado, isto é, inegociável como objeto de humor. Como conclusão, salientamos o papel do humor no reforço das relações pessoais, dos valores do grupo e na sacralização da amizade. / This research focuses on the construction of humor in interaction, in social meetings of a group of friends. The aim of this study is to explore the complexity and ambivalence of humor in relationships marked by proximity and affection. Assuming that conversational humor is a relational and collaborative phenomenon that depends on knowledge of group norms and is generated by a possible breach of expectation with respect to knowledge schemes, we sought to describe how humorous sequences are organized, identify what types of humor emerge in conversation and what functions humor plays in the context under study. Through an interactional approach to humorous communication and with contributions from Conversation Analysis, we find that humorous sequences are constituted by other sequences involving participants who ‘hunt’ or who leave triggers for humor and, in some cases, other participants who feed the one who started the humorous sequence. In terms of types of humor, we identified irony, fantasy humor (Hay, 2001), jocular mockery (Haugh, 2010; Haugh and Bousfield, 2012) and jocular abuse (Hay, 1994; Haugh, 2010; and Haugh Bousfield, 2012). Regarding fantasy humor, we proposed two categories: an exaggerated fantasy humor and an absurd fantasy humor. Both involve the joint construction of an imaginary world with its own logic, with irrational and absurd rules that do not apply to the real world (Hay, 2001), but the first one is categorized by the joint construction of a world known by the participants, and the second one, a nonsense world. We show that jocular mockery may be directed at the self of one of the group members or may be hybrid, targeting the self, a third person or an object. As for the functions of humor, we highlight entertainment as the main function of humor in the group. As secondary functions are: i) humor as the guardian of interpersonal relationships in moments of potential conflict, and ii) humor as threat to relations when some aspect of the self is considered sacred, that is, non-negotiable as an object of humor. In conclusion, we emphasize the role of humor in strengthening personal relationships, the values of the group and sanctity of friendship.

“The Wanderings of Oisin” was published in 1889 and is one of W.B Yeats’ earliest poems and is the main focus for this essay. The poem depicts the duality of Irish identity and the transition from one system of belief to another. This essay will demonstrate that W.B Yeats uses Celtic and Catholic mythology in “The Wanderings of Oisin” in order to reflect his contemporary Ireland. The essay begins with a deifintion and a discussion about the words 'myth' and 'mythical method'. The second part of the essay describes the depiction of Celtic and Catholic mythology in “The Wanderings of Oisin” and the connection to late nineteenth century Ireland. The first section presents information on Irish nineteenth-century history and the second section focuses on five parallels to Yeats' contemporary society: The vitality of Celtic mythological beings, the depiction of Oisin as mediator, the sense of loss regarding Irish culture, the juxtaposition of Celtic and Catholic and the ambivalence that follows in a society where two conflicting mythologies coexist and compete. The main body of arguments discusses these parallels between Yeats’ portrayal of Celtic mythology and nineteenth century Ireland and shows that "The Wanderings of Oisin" reflects Yeats' contemporary Irish society.

No description available.

L'observation et l'étude des milieux moléculaires tel que le milieu interstellaire requièrent une connaissance détaillée des vitesses des processus de peuplement radiatifs et collisionnels afin d'accéder aux caractéristiques physiques (températures, densités, abondances des molécules, ...) de ces milieux. Les hydrures d'azote sont très présents dans les milieux interstellaires où ils s'avèrent être des intermédiaires de réaction important dans la chimie de l'azote. L'interprétation des observations des hydrures d'azote réalisées grâce au satellite HERSCHEL et l'interféromètre millimétrique ALMA, nécessite de connaître avec suffisamment de précision les taux de collision de ces molécules. Nous nous sommes donc intéressés dans cette thèse à la détermination des taux de collisions inélastiques des hydrures NH, NH2 et NH3 avec Ne, H2 et H, respectivement. A partir de surfaces d’énergie potentielle, les sections efficaces ont été obtenues pour les trois systèmes par la méthode exacte des équations couplées en utilisant les codes de dynamique moléculaire MOLSCAT et HIBRIDON. Les taux de collision sont ensuite obtenus pour des températures allant de 5 à 200 K. Enfin, les nouveaux taux de collisions de NH2 avec H2 ont été utilisés dans un code de transfert radiatif afin de reproduire les observations de NH2 en direction d'un nuage de formation d’étoile massive W31C. Nous montrons que les nouveau taux de collisions calculés apportent des contraintes sur les conditions physiques du nuage moléculaire. / Observation and study of interstellar molecular clouds require the knowledge of molecular data to derive the physical conditions (temperature, gas density, molecular abundance) of these media. Nitrogen hydrides are highly abundant species in the interstellar medium and they are found to be important reaction intermediates in the nitrogen chemistry. The interpretation of nitrogen hydrides observations from the HERSCHEL spatial observatory and the ALMA interferometer, requires accurate collisional rate coefficients of these molecules. The present thesis focuses on the determination of new rate coefficients for NH, NH2 and NH3 molecules in collision with Ne, H2 et H, respectively. Inelastic cross sections for the rotational excitation of all the studied systems have been computed with a close coupling method using the molecular dynamic codes MOLSCAT and HIBRIDON. The cross sections are then used to calculate the collisional rate coefficients for temperatures ranging from 5 to 200 K. The new rate coefficients were included in radiative transfer calculations in order to model the observed transitions of NH2 towards high-mass star-forming region W31C. We show that using the previously published rate coefficients instead of these new ones have a significant impact on the modeling, leading to important differences on the density, abundance and on the OPR of NH2. The new data will allow to put interesting constraints on the physical condition of the molecular cloud.

L’intervention du pouvoir judiciaire, pour arbitrer un scrutin en dernier recours, pose certains problèmes de déroulement dans la démocratie représentative, voire un paradoxe : le principe de la représentation démocratique par vote direct des citoyens peut être mis en cause par l’interprétation judiciaire de l’expression des voix. En même temps, l’intervention du judiciaire comme pouvoir indépendant constitue une garantie d’impartialité sur les résolutions politiques cherchant à renforcer la confiance des principaux acteurs sociaux et politiques sur l’administration électorale. D’autre part, le problème de la rationalité du politique versus la rationalité juridique reste confronté en permanence en cas de processus électoraux conflictuels. Celles-ci s’avèrent des approches indispensables bien que pratiquement antagoniques, du fait qu’elles poursuivent des intérêts proches, mais en soit très distincts. / The intervention of the judiciary power to solve a ballot in last resort, arise several problems concerning the progress of the representative democracy, and even a paradox: the principle of the democratic representation by an indirect vote of the citizens can be put forward by the judiciary interpretation on the meaning of the ballot's votes. At the same time, the intervention of the judiciary as an independent power constitutes a guarantee of impartiality for the political resolutions, seeking to reinforce the trust of the main social and political protagonists about the electoral administration. We are also faced with the problem of the political rationality versus the legal rationality, constantly put forward during electoral conflict contemporary processes as essential protagonists but nearly antagonistic ones, by the fact that they pursue close but distinct interests.