Ce travail de recherche s’inscrit dans le champ de la communication engageante. Un certain nombre de travaux antérieurs se sont intéressés à la pratique de la communication engageante dans un contexte de face à face. La contribution de ce travail porte sur l’étude de la communication engageante dans un contexte de communication médiatisée par ordinateur. Véritable travail interdisciplinaire, il se situe au creuset de la psychologie sociale, des sciences de l’information et de la communication et de l’informatique. La question de recherche consiste à s’interroger sur la transposition des conditions et techniques de l’engagement dans des environnements numériques. Pour répondre à cette question, un travail de terrain a été réalisé sur le thème de l’humanitaire sur le web. Les stratégies de communications en ligne des organisations humanitaires ont été étudiées de façon approfondie. Par la suite un travail de terrain a été articulé autour de plusieurs expérimentations conduites en face à face puis en ligne dans un contexte humanitaire. Le choix a été fait de privilégier la production expérimentale dans des conditions naturelles. Si l’efficacité de la communication engageante est incontestable dans le cadre de la communication en face à face, les résultats sont moins probants dans le cadre des expérimentations conduites dans les environnements numériques. S’amorce alors une analyse critique permettant de mieux comprendre les raisons de ces résultats. / This research is in the field of binding communications. A number of previous studies have focused on the practice of binding communications in the face-to-face setting. This research provides a contribution to the field with novel experiments of binding communication in the context of computer mediated communications. It is a true interdisciplinary research with foundations in social psychology, information communication sciences and information communication technology. The research question is to examine the implementation of binding communication techniques in the computer mediated setting. To answer this question, fieldwork was carried out on the theme of humanitarianism on the Web. The online communication strategies of popular humanitarian organizations have been extensively studied. Subsequently, fieldwork was structured around several experiments conducted in the face-to-face and online settings in a humanitarian context. The choice was made to focus our experimental studies in real world conditions as opposed to developing laboratory setting tests. If the effectiveness of binding communication strategies is undeniable in the face-to-face setting, the results are less convincing in our experiments conducted in the computer mediated environment. This research paves the way for future critical analyses needed in order to better understand the results obtained from our experimentations.

Univ., Diss.--Heidelberg, 2000.

Mémoire (M.P.M.O)-- Université du Québec à Chicoutimi, 1992. / Bibliogr.: f. [80]-84. Document électronique également accessible en format PDF. CaQCU

Thèse (Ph. D.)--Université Laval, 2004. / Bibliogr.: f. [95]-101. Publié aussi en version électronique.

A guarda responsável dos animais domésticos é relevante por duas questões principais: a Ética e a Saúde Pública. Os cuidados adequados com os animais são uma questão ética cada vez mais discutida em nossa sociedade, devido às interações homem-animal cada vez mais estreitas. Apesar disso, a guarda responsável é um tema interessante não apenas para aqueles que se importam com uma vida digna aos animais, mas também essencial para evitar problemas de saúde pública como agressões e zoonoses. Esse trabalho visou verificar se a disponibilidade de cuidados veterinários e castrações gratuitas, bem como ações educativas durante dois anos em uma comunidade do município de São Paulo tornaram ou não a guarda de animais mais responsável. Como principais resultados, houve mudança significativa na quantidade de destinos positivos que foram dados aos cães após a presença de serviços de saúde no bairro, concomitantemente houve aumento do número cães com guardiões, o que requer um programa contínuo de manejo populacional de animais domésticos. / The pets responsible ownership is important for two main issues: Ethics and Public Health. Proper care of the animals is an ethical issue increasingly discussed in our society due to stronger human-animal relationship. Nevertheless, responsible ownership is an interesting topic not only for those who care for a dignified life to animals, but also essential to prevent public health problems such as aggression and zoonosis. This study aimed to verify if the availability of veterinary care, free castrations, and educational activities for two years in a community of São Paulo city made it more responsible towards domestic animals. As main results, significant change in the amount of positive destinations that were given to dogs after the presence of health services in the community was observed. Furthermore, concomitant increase in dogs with guardians was observed, requiring a continuous pet management program.

The problem of classifying the Anosov systems is of great interest in the theory of dynamical systems. The most important known examples are of algebraic nature and it has been conjectured on 1960s by S. Smale (SMALE, 1967) that these are in fact the only examples. This conjecture has been proved false for Anosov flows, where counter examples had been constructed for odd dimensional manifolds ((HANDEL; THURSTON, 1980) and (BARTHELMé et al., )). This non algebraic examples however are very pathological, and with some stronger hypothesis, for example, smoothness of the invariant bundles, the conjecture remains open. In 1992, it was published a paper (BENOIST; FOULON; LABOURIE, 1992) which proved that contact Anosov flows with smooth invariant bundles are in fact algebraic. In this monograph we seek to generalize the result obtained in (BENOIST; FOULON; LABOURIE, 1992). For this end, we create an adequate definition for contact Anosov Rk-actions, and following the proof strategy used in (BENOIST; FOULON; LABOURIE, 1992) we obtained a partial generalization of this result. / O problema da classificação dos sistemas Anosov são de grande interesse dentro da teoria dos sistemas dinâmicos. Os principais exemplos conhecidos são de natureza algébrica e foi levantada na década de 1960 a conjectura de que estes são os únicos exemplos (SMALE, 1967). Esta conjectura se mostrou falsa para fluxos Anosov (ações de R), onde foram construídos contraexemplos em variedades de dimensões impares ((HANDEL; THURSTON, 1980) e (BARTHELMé et al., )). Estes contra exemplos no entanto são de natureza patológica, e sob hipóteses um pouco mais fortes, por exemplo, suavidade dos fibrados invariantes, a conjectura permanece em aberto. Em 1992, foi publicado um artigo (BENOIST; FOULON; LABOURIE, 1992) provando que fluxos de contato Anosov com fibrados invariantes suaves são de fato algébricos . Neste trabalho procuramos generalizar o resultado obtido em (BENOIST; FOULON; LABOURIE, 1992). Para isso criamos uma definição adequada para ações de Rk contato Anosov, que generalizam a noção de fluxo de contato Anosov, e seguindo a estratégia de prova utilizada em (BENOIST; FOULON; LABOURIE, 1992), obtivemos uma generalização parcial deste resultado.

Cette thèse a pour but de proposer de nouvelles méthodes d'indexation des bases de données vidéo de type archive culturelle à partir des actions humaines qu'elles contiennent. Les actions humaines, représentent un aspect important des contenus multimédia, à côté des sons, images ou de la parole. L'interrogation technique principale à laquelle nous répondons est ``Comment détecter et localiser précisément et rapidement dans une vidéo une action humaine, à partir de quelques exemples de cette même action?''. Le défi relevé par cette interrogation se trouve dans la satisfaction de ces deux critères: qualité de détection et rapidité.Nous avons traité, dans une première partie, l'adaptation des mesures de similarité aux contraintes de temps de calcul et mémoire nécessaires pour avoir un système rapide de détection d'actions. Nous avons montré qu'une approche de type "alignement de séquences" couplée avec une sélection de variables permet de répondre rapidement à des requêtes et obtient une bonne qualité des résultats. L'ajout d'un filtrage préliminaire permet d'améliorer encore les performances.Dans une seconde partie de la thèse nous avons crée une méthode d'accélération de l'étage de filtrage pour obtenir une complexité de recherche sous-linéaire dans la taille de la base. Nous nous sommes basés sur le hachage sensible à la similarité et sur une nouvelle approche à l'exploration dans l'espace de hachage, adaptée à la << requête-par-détecteur >>.Nous avons testé les méthodes proposées sur une nouvelle base annotée de vidéos de grande taille destinée à la détection et localisation d'actions humaines. Nous avons montré que nos approches donnent des résultats de bonne qualité et qu'elles peuvent passer à l'échelle. / This thesis proposes new methods for indexing video collections with varied content, such as cultural archives. We focus on human actions, which represent an important cultural aspect, together with sound, images and speech. Our main technical challenge is 'How to quickly detect and precisely localize human actions in a large video collection, when these actions are given as a query through example video clips?'. Thus, the difficulty of the task is due to criteria: quality of detection and search response time.

京都大学 / 0048 / 新制・課程博士 / 博士(理学) / 甲第18044号 / 理博第3922号 / 新制||理||1566(附属図書館) / 30902 / 京都大学大学院理学研究科数学・数理解析専攻 / (主査)准教授 浅岡 正幸, 教授 加藤 毅, 教授 藤原 耕二 / 学位規則第4条第1項該当 / Doctor of Science / Kyoto University / DFAM

The nature of this paper is expository. The purpose is to present the fundamental material concerning actions of infinite discrete groups on the n-sphere and pseudo-Riemannian space forms based on the works of Gehring, Martin and Kulkarni and provide appropriate examples. Actions on the n-sphere split it into ordinary and limit sets. Assuming, additionally, that a group acting on the n-sphere has a certain convergence property, this thesis includes conditions for the existence of a homeomorphism between the limit set and the set of Freudenthal ends, as well as topological and quasiconformal conjugacy between convergence and Mobius groups. Since the certain pseudo-Riemannian space forms are diffeomorphic to non-compact spaces, the work of Hambleton and Pedersen gives conditions for the extension of discrete co-compact group actions on pseudo-Riemannian space forms to actions on the sphere. An example of such an extension is described. / Thesis / Master of Science (MSc)

Researchers have failed to specify when crime and counter-normative actions, as opposed to other responses may occur as a consequence of relative deprivation. To clarify this issue, a mediational model was developed that specified the causal processes leading from the recognition of deprivation to crime and counter-normative actions. This model hypothesizes that the recognition of deprivation (cognitive relative deprivation) leads to feelings associated with this recognition (affective relative deprivation) which in turn leads to crime and counter-normative actions. This model applies to both personal and group deprivation. In both cases, the feelings associated with deprivation include anger, resentment, dissatisfaction, and discontent. Data from a sample of 950 males between the ages of 16 to 30 supported the mediational model. Moderator variables were hypothesized to influence the causal processes in the mediational model, and were thus employed to specify the conditions under which the recognition of deprivation became more likely to lead to intense emotional reactions, and the conditions under which these emotional reactions became more likely to lead to crime and counter-normative actions. Personal deprivation was found to lead to stronger emotional responses if persons were pessimistic about their deprivation being relieved in the future, while at the group level, higher levels of optimism were related to stronger emotional responses. Both types of deprivation also lead to stronger emotional responses when persons believe that financial success and wealth are important. The emotive responses for both personal and group deprivation, in turn, were more likely to lead to crime and counter-normative actions if deprived persons had criminal peers. It was also found that the recognition of personal deprivation was more likely to lead to depression and lower self-esteem if people blamed themselves for their deprivation than if they did not. Persons who were not optimistic that their deprivation would be relieved in the future were more depressed than persons who were optimistic. Persons whose in-group was deprived were more likely to have lower self-esteem if they blamed the in-group for its deprivation than if they did not.