• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 197
  • 121
  • 61
  • 27
  • 23
  • 12
  • 9
  • 4
  • 4
  • 4
  • 3
  • 3
  • 2
  • 2
  • 2
  • Tagged with
  • 533
  • 152
  • 97
  • 51
  • 50
  • 46
  • 42
  • 40
  • 35
  • 35
  • 35
  • 32
  • 29
  • 28
  • 28
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
281

Réflexions méthodologiques autour du Napping : vers une intégration du comportement du sujet dans l’analyse des données de Napping / Methodological reflection elements around the Napping® method : towards the integration of subject behaviour in the analysis of the Napping® data

Le, Minh Tam 21 September 2015 (has links)
L’objectif de ce travail de thèse est d’amener des éléments de réflexions méthodologiques autour du Napping®. Le premier chapitre de ce manuscrit rappelle aux lecteurs ce qu’est le Napping®, à travers une description de la tâche et des données qu’elle fournit, telles qu’elles ont été imaginées initialement par Jérôme Pagès (2005). C’est dans ce même chapitre que le lecteur peut réaliser à quel point il est important de prendre en compte le comportement du sujet lors de la tâche, tant pour la compréhension des données que pour leur traitement. Le deuxième chapitre de ce manuscrit propose un modèle du comportement du sujet dans le cas où le nombre de stimuli est relativement élevé, une situation couramment rencontrée en pratique.Ce modèle et ses limites amènent le lecteur au chapitre 3, dans lequel il est présenté une méthode originale de recueil de données de Napping® appelée digit-tracking. Cette méthode permet d’observer le comportement du sujet au cours du temps par l’enregistrement du positionnement relatif des stimuli tout au long de la tâche et non plus seulement lors de l’étape finale. Enfin le dernier chapitre du manuscrit présente l’outil qui a été développé au cours de cette thèse et qui permet de recueillir des données de Napping® au cours du temps. Cet outil est une plateforme collaborative, appelée Holos, couplée à un logiciel de recueil de données sur tablette tactile, qui permet aux chercheurs de partager une partie ou l’ensemble de leurs résultats. / The objective of this dissertation aims to bring the methodological reflection elements around the Napping® method. Chapter 1 provides the concept of Napping® via a description of its procedure and data format, as it was originally conceived by Jérôme Pagès (2005). This chapter also discussed the importance of taking into account the subject's behaviour during the task for a better understanding of the data collected and their analysis. Chapter 2 proposes a model of the subject's behaviour in which the number of stimuli is relatively high, a situation commonly encountered in practice. This model and its limitations lead to Chapter 3, where a new technique for collecting Napping® data, named digit-tracking, is presented.This new technique of data collection allows to observe the subject’s behaviour over time by recording the relative positioning of all stimuli throughout the task rather than solely her/his final configuration. Finally, Chapter 4 presents a tool devoted to collecting Napping® data over time. This tool is a collaborative platform that works together with an android application for collecting data on tactile tablet devices – Holos environment, which enables researchers to share totally or partially their study resources.
282

Pour un Test projectif tactile à partir des planches de Rorschach en relief : de la Perception tactile à la Représentation / Tactilo-kinaesthetic exploration procedures for apprehending the Rorschach test

Raguin, Odile 25 September 2015 (has links)
La plupart des méthodes projectives (Didier ANZIEU, Catherine CHABERT, 1961) ont comme support de travail la vue. Le processus haptique est-il suffisamment discriminatif pour valider la fiabilité de ce test sous ce mode ? Un étalonnage différencié respecte-t-il la valeur donnée à ce test par H. Rorschach ? Le sujet, en perdant la vue, va devoir mobiliser ou trouver des nouvelles ressources physiques et psychiques pour devenir autonome et poursuivre sa vie. Tout en lui est effracté : sa construction narcissique, sa représentation du monde et son altérité dans le regard de l’autre. Le Rorschach permet d’aborder la richesse psychique d’un sujet. Il nous donne à voir les potentialités psychiques du sujet dans sa relation à lui-même et aux autres. Or, il fait appel à une activité visuelle qui organise un matériel informel. C’est une activité imageante qui fait passer du perceptif au projectif, du perçu au vécu…Le toucher, dans certaines situations, peut être un relais de perception, de projection et donner à voir les représentations du sujet. Cette recherche peut permettre d’envisager une autre manière d’étalonner ce test afin de pouvoir le quantifier, le qualifier en changeant par exemple l’item « couleur » par l’item texture…Dans cette étude, il nous faut vérifier que cela n’enlève pas la valeur que donnait H. Rorschach à ce test, à cet item mais au contraire l’ouvre à une autre dimension clinique, celle d’une clinique spécifique du sujet mal ou non-voyant. En respectant un protocole spécifique, une telle passation permettrait une médiation pour le sujet en situation de handicap visuel vers une « meilleure » ré-élaboration de son projet de vie. Par ailleurs, cette étude pourrait ouvrir d’autres approches sur le dessin en relief et permettre notamment à toute une partie de la population vieillissante d’utiliser cette modalité dans la vie quotidienne, pour de nouveaux repères. / This research follows a study already begun in Master 1; it deals with the haptic process adapted to 3-dimensional Rorschach-plates. Is the haptic process sufficiently discriminating to validate the reliability of this test under this mode ? Does differentiated calibration respect the values given to this test by H. Rorschach ? After loss of sight, a subject is going to have to mobilize or find new physical and psychic resources to become autonomous and go on living. Everything in that person is broken: their narcissistic construction, their representation of the world and their differences in the eye of others. The Rorschach test allows us to approach a subject’s psychic wealth. It shows us the psychic potential of a subject in relation to himself and to others. Yet the Rorschach test calls on visual activity to organize an informal material. It is an activity based on images which leads one from the perceptive to the projective, from perceived to experienced. In certain situations, touch can be an intermediary for perception, for projection and can show how the subject is represented. Through this research, we can consider calibrating this test in another way in order to measure quantity and quality by changing “colour” for ‘texture’, for example. In this study, it is essential to verify that this does not remove the value given by H. Rorschach to this item in this test, but on the contrary opens it to other clinical dimensions, that specific of the blind or partially-sighted.Moreover, this study could open up new approaches to 3-dimensional drawings and allow a great part of the ageing population to use this method in daily life, to find new bearings. For instance, using certain textures to find one’s way around the flat by 3-dimensional pictograms.
283

Non-algebraic convergence proofs for continuous-time fictitious play

Berger, Ulrich January 2012 (has links) (PDF)
In this technical note we use insights from the theory of projective geometry to provide novel and non-algebraic proofs of convergence of continuous-time fictitious play for a class of games. As a corollary we obtain a kind of equilibrium selection result, whereby continuous-time fictitious play converges to a particular equilibrium contained in a continuum of equivalent equilibria for symmetric 4x4 zero-sum games.
284

The relationship between three anxiety related clusters in projective drawings and anxiety and ego-strength scales of the Minnesota multiphasic personality inventory-2

Brink, André January 2002 (has links)
Based on the shortcomings of past research, the need for understanding and investigation of the general relationship between self-report measures and human figure drawings required understanding and investigation (Riethmiller & Handler, 1997b; Waehler, 1997) while utilising a quantitative, configural scoring approach. Riethmiller and Handler (1997a; 1997b) hypothesised that subjects have one of two typical approach styles to anxiety/stress that influences their execution of the Human Figure Drawing (HFD) Test: “Avoidance” or “Coping” as measured by composite scoring index clusters. They argue that these two approach styles had to be taken into account when investigating anxiety on the HFD Test. According to Handler and Reyher (1965) those who experience more intense anxiety typically rely on an “Avoidant” approach, while those with lower anxiety typically rely on a “Coping” approach. The “Coping” response is hypothesised to suggest good ego-strength, and the “Avoidant” response poor ego-strength. Handler and Reyher (1964; 1965; 1966) also argued that there are two sources of anxiety on projective drawings: internal and external sources of anxiety. They hypothesised that the “External” anxiety cluster (measured by utilising the car drawing) and self-report measures both assess ‘external’ anxiety. Using Handler’s (1967) HFD index scoring manual, this research therefore inve stigated the level of correlation of the two MMPI-2 anxiety scale scores with (a) the hypothesised Stress Approach HFD cluster scores, as well as with (b) the “External” anxiety cluster score, while the hypothesised Stress Approach HFD cluster scores were compared with the (c) MMPI-2 ego strength scale score. The results of the investigated relationships yielded non-significant correlations overall. The differences in nature of the two measurement instruments, and the potential weaknesses of this study, as two likely explanations for these correlations, are discussed. In the consideration of the differences of the two measurement instruments, the weaknesses of SR measures and criterion-related validity are discussed while self- attributed and implicit motives are contrasted with each other. Potential extraneous variables and possible truncated range are discussed as potential weaknesses of this study.
285

Characteristic classes of modules

Kong, Maynard 25 September 2017 (has links)
In this paper we have developed a general theory of characteristic classes of modules. To a given invariant map defined on a Lie algebra, we associate a cohomology class by using the curvature form of a certain kind of connections. Here we present a very simple proof of the invariance theorem (Theorem 12), which states that equivalent connections give rise to the same characteristic class. We have used those invariant maps of {9} to define Chern classes of projective modules and we have derived their basic properties. It might be interesting to observe that this theory could be applied to define characteristic classes of bilinear maps. In particular, the Euler classes of {6} can be obtained in this way.
286

A contribution to the theory of (signed) graph homomorphism bound and Hamiltonicity / Une contribution à la théorie des graphes (signés) borne d’homomorphisme et hamiltonicité

Sun, Qiang 04 May 2016 (has links)
Dans cette thèse, nous etudions deux principaux problèmes de la théorie des graphes: problème d’homomorphisme des graphes planaires (signés) et problème de cycle hamiltonien.Comme une extension du théorème des quatre couleurs, il est conjecturé([80], [41]) que chaque graphe signé cohérent planaire de déséquilibré-maille d+1(d>1) admet un homomorphisme à cube projective signé SPC(d) de dimension d. La question suivant étalés naturelle:Est-ce que SPC(d) une borne optimale de déséquilibré-maille d+1 pour tous les graphes signés cohérente planaire de déséquilibré-maille d+1?Au Chapitre 2, nous prouvons que: si (B,Ω) est un graphe signé cohérente dedéséquilibré-maille d qui borne la classe des graphes signés cohérents planaires de déséquilibré-maille d+1, puis |B| ≥2^{d−1}. Notre résultat montre que si la conjecture ci-dessus est vérifiée, alors le SPC(d) est une borne optimale à la fois en terme du nombre des sommets et du nombre de arêtes.Lorsque d=2k, le problème est équivalent aux problème des graphes:est-ce que PC(2k) une borne optimale de impair-maille 2k+1 pour P_{2k+1} (tous les graphes planaires de impair-maille au moins 2k+1)? Notez que les graphes K_4-mineur libres sont les graphes planaires, est PC(2k) aussi une borne optimale de impair-maille 2k+1 pour tous les graphes K_4-mineur libres de impair-maille 2k+1? La réponse est négative, dans[6], est donné une famille de graphes d’ordre O(k^2) que borne les graphes K_4-mineur libres de impair-maille 2k+1. Est-ce que la borne optimale? Au Chapitre 3, nous prouvons que: si B est un graphe de impair-maille 2k+1 qui borne tous les graphes K_4-mineur libres de impair-maille 2k+1, alors |B|≥(k+1)(k+2)/2. La conjonction de nos résultat et le résultat dans [6] montre que l’ordre O(k^2) est optimal. En outre, si PC(2k) borne P_{2k+1}, PC(2k) borne également P_{2r+1}(r>k).Cependant, dans ce cas, nous croyons qu’un sous-graphe propre de P(2k) serait suffisant à borner P_{2r+1}, alors quel est le sous-graphe optimal de PC2k) qui borne P_{2r+1}? Le premier cas non résolu est k=3 et r= 5. Dans ce cas, Naserasr [81] a conjecturé que le graphe Coxeter borne P_{11}. Au Chapitre 4, nous vérifions cette conjecture pour P_{17}.Au Chapitres 5, 6, nous étudions les problèmes du cycle hamiltonien. Dirac amontré en 1952 que chaque graphe d’ordre n est hamiltonien si tout sommet a un degré au moins n/2. Depuis, de nombreux résultats généralisant le théorème de Dirac sur les degré ont été obtenus. Une approche consiste à construire un cycle hamiltonien à partir d'un ensemble de sommets en contrôlant leur position sur le cycle. Dans cette thèse, nous considérons deux conjectures connexes. La première est la conjecture d'Enomoto: si G est un graphe d’ordre n≥3 et δ(G)≥n/2+1, pour toute paire de sommets x,y dans G, il y a un cycle hamiltonien C de G tel que dist_C(x,y)=n/2.Notez que l’ ́etat de degre de la conjecture de Enomoto est forte. Motivé par cette conjecture, il a prouvé, dans [32], qu’une paire de sommets peut être posé des distances pas plus de n/6 sur un cycle hamiltonien. Dans [33], les cas δ(G)≥(n+k)/2 sont considérés, il a prouvé qu’une paire de sommets à une distance entre 2 à k peut être posé sur un cycle hamiltonien. En outre, Faudree et Li ont proposé une conjecture plus générale: si G est un graphe d’ordre n≥3 et δ(G)≥n/2+1, pour toute paire de sommets x,y dans G et tout entier 2≤k≤n/2, il existe un cycle hamiltonien C de G tel que dist_C(x,y)=k. Utilisant de Regularity Lemma et Blow-up Lemma, au chapitre 5, nous donnons une preuve de la conjeture d'Enomoto conjecture pour les graphes suffisamment grand, et dans le chapitre 6, nous donnons une preuve de la conjecture de Faudree et Li pour les graphe suffisamment grand. / In this thesis, we study two main problems in graph theory: homomorphism problem of planar (signed) graphs and Hamiltonian cycle problem.As an extension of the Four-Color Theorem, it is conjectured ([80],[41]) that every planar consistent signed graph of unbalanced-girth d+1(d>1) admits a homomorphism to signed projective cube SPC(d) of dimension d. It is naturally asked that:Is SPC(d) an optimal bound of unbalanced-girth d+1 for all planar consistent signed graphs of unbalanced-girth d+1?In Chapter 2, we prove that: if (B,Ω) is a consistent signed graph of unbalanced-girth d which bounds the class of consistent signed planar graphs of unbalanced-girth d, then |B|≥2^{d-1}. Furthermore,if no subgraph of (B,Ω) bounds the same class, δ(B)≥d, and therefore,|E(B)|≥d·2^{d-2}.Our result shows that if the conjecture above holds, then the SPC(d) is an optimal bound both in terms of number of vertices and number of edges.When d=2k, the problem is equivalent to the homomorphisms of graphs: isPC(2k) an optimal bound of odd-girth 2k+1 for P_{2k+1}(the class of all planar graphs of odd-girth at least 2k+1)? Note that K_4-minor free graphs are planar graphs, is PC(2k) also an optimal bound of odd-girth 2k+1 for all K_4-minor free graphs of odd-girth 2k+1 ? The answer is negative, in [6], a family of graphs of order O(k^2) bounding the K_4-minor free graphs of odd-girth 2k+1 were given. Is this an optimal bound? In Chapter 3, we prove that: if B is a graph of odd-girth 2k+1 which bounds all the K_4-minor free graphs of odd-girth 2k+1,then |B|≥(k+1)(k+2)/2. Our result together with the result in [6] shows that order O(k^2) is optimal.Furthermore, if PC(2k) bounds P_{2k+1},then PC(2k) also bounds P_{2r+1}(r>k). However, in this case we believe that a proper subgraph of PC(2k) would suffice to bound P_{2r+1}, then what’s the optimal subgraph of PC(2k) that bounds P_{2r+1}? The first case of this problem which is not studied is k=3 and r=5. For this case, Naserasr [81] conjectured that the Coxeter graph bounds P_{11} . Supporting this conjecture, in Chapter 4, we prove that the Coxeter graph bounds P_{17}.In Chapter 5,6, we study the Hamiltonian cycle problems. Dirac showed in 1952that every graph of order n is Hamiltonian if any vertex is of degree at least n/2. This result started a new approach to develop sufficient conditions on degrees for a graph to be Hamiltonian. Many results have been obtained in generalization of Dirac’s theorem. In the results to strengthen Dirac’s theorem, there is an interesting research area: to control the placement of a set of vertices on a Hamiltonian cycle such that thesevertices have some certain distances among them on the Hamiltonian cycle.In this thesis, we consider two related conjectures, one is given by Enomoto: if G is a graph of order n≥3, and δ(G)≥n/2+1, then for any pair of vertices x, y in G, there is a Hamiltonian cycle C of G such that dist_C(x, y)=n/2. Motivated by this conjecture, it is proved,in [32],that a pair of vertices are located at distances no more than n/6 on a Hamiltonian cycle. In [33], the cases δ(G) ≥(n+k)/2 are considered, it is proved that a pair of vertices can be located at any given distance from 2 to k on a Hamiltonian cycle. Moreover, Faudree and Li proposed a more general conjecture: if G is a graph of order n≥3, and δ(G)≥n/2+1, then for any pair of vertices x, y in G andany integer 2≤k≤n/2, there is a Hamiltonian cycle C of G such that dist_C(x, y) = k. Using Regularity Lemma and Blow-up Lemma, in Chapter 5, we give a proof ofEnomoto’s conjecture for graphs of sufficiently large order, and in Chapter 6, we give a proof of Faudree and Li’s conjecture for graphs of sufficiently large order.
287

Fotogrammetrická analýza obrazů / Photogrammetric Image Analysis

Velebová, Jana January 2011 (has links)
This thesis is dedicated photogrammetric image analysis that makes it possible from your photos with the help selected methods to determine the location and dimensions of objects recorded on them. There are explained the basics of photogrammetry and its current application. Chapters focused on digital imaging describing its characteristics, treatment options and key points findability for the scene calibration. For a comprehensive view are in this thesis introduced examples of existing software, its possibilities and use in practice.
288

Co pro ženy znamená stáří a stárnutí? / What does aging and old age mean for women?

Roedlová, Adéla January 2014 (has links)
This master thesis deals with the subjective view of middle aged and older Czech women on problematic of old age and aging. In connection of old age and aging they focus more on the aging of the whole society or relation between the generations, but not on a subjective perception and experience of this life stage and process. The aim of this work is to find out what women consider as the key elements of old age and aging and also to create a comprehensive view of aging from the women perspective. It is also essential to the thesis to determine the differences and similarities in the perception of aging in terms of age and life stage. In this thesis is used a method of qualitative research, which is grounded in the phenomenological approach and data collection is carried out using the ZMET research method. This projective technique of data collection, whose theory and practice is described in the work, is based on the idea that people do not think verbally but in images. Powered by TCPDF (www.tcpdf.org)
289

Orbit parametrizations of theta characteristics on hypersurfaces / 超曲面上のシータ・キャラクタリスティックの軌道によるパラメータ付け

Ishitsuka, Yasuhiro 23 March 2015 (has links)
京都大学 / 0048 / 新制・課程博士 / 博士(理学) / 甲第18766号 / 理博第4024号 / 新制||理||1580(附属図書館) / 31717 / 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 伊藤 哲史, 教授 上田 哲生, 教授 雪江 明彦 / 学位規則第4条第1項該当 / Doctor of Science / Kyoto University / DFAM
290

Limit Theorems for Random Fields

Zhang, Na 18 October 2019 (has links)
No description available.

Page generated in 0.0722 seconds