Global ETD Search

441	Methods for face detection and adaptive face recognition Pavani, Sri-Kaushik 21 July 2010 (has links) The focus of this thesis is on facial biometrics; specifically in the problems of face detection and face recognition. Despite intensive research over the last 20 years, the technology is not foolproof, which is why we do not see use of face recognition systems in critical sectors such as banking. In this thesis, we focus on three sub-problems in these two areas of research. Firstly, we propose methods to improve the speed-accuracy trade-off of the state-of-the-art face detector. Secondly, we consider a problem that is often ignored in the literature: to decrease the training time of the detectors. We propose two techniques to this end. Thirdly, we present a detailed large-scale study on self-updating face recognition systems in an attempt to answer if continuously changing facial appearance can be learnt automatically. / L'objectiu d'aquesta tesi és sobre biometria facial, específicament en els problemes de detecció de rostres i reconeixement facial. Malgrat la intensa recerca durant els últims 20 anys, la tecnologia no és infalible, de manera que no veiem l'ús dels sistemes de reconeixement de rostres en sectors crítics com la banca. En aquesta tesi, ens centrem en tres sub-problemes en aquestes dues àrees de recerca. En primer lloc, es proposa mètodes per millorar l'equilibri entre la precisió i la velocitat del detector de cares d'última generació. En segon lloc, considerem un problema que sovint s'ignora en la literatura: disminuir el temps de formació dels detectors. Es proposen dues tècniques per a aquest fi. En tercer lloc, es presenta un estudi detallat a gran escala sobre l'auto-actualització dels sistemes de reconeixement facial en un intent de respondre si el canvi constant de l'aparença facial es pot aprendre de forma automàtica. Fisher's LDA Gaussian weak classifiers Weak classifier Variance normalization Transductive reasoning training complexity rejection cascade fusion of p-values OSTCM-kNN classifier integrated Performance Primitives impostor detection haar-like features fusion of shape and texture face recognition system delaunay triangulation MIT+CMU face database YT database GEFA database temporal confidence segmentation confidence face detector confidence classification confidence laplacian clutter model clutter models changes in facial appearance face segmentation face normalization face detection automatic face recognition system 62
442	Teaching street children in a school context: some psychological and educational implications Harper, Michael Leigh 30 September 2003 (has links) This study investigated the psychological approach and the classroom methodology needed by an educator to teach street children effectively in a special school created for them. Street children with their psychological trauma, their independent, self-sufficient outlook and educational deprivation make their adaption to the methods and educational environment of mainstream schooling difficult. To meet the special educational, psychological and emotional needs of street children, Masupatsela School was started. The study was carried out in this school. The qualitative research methodology used an action research design which consisted of a reconnaissance phase and three cycles. Each cycle made use of a planning, implementation and evaluation phase. A general plan was formulated after the reconnaissance phase and revised after each cycle. The teaching was done by the researcher using four grades of street children ranging form grade 7 to grade 10. Because of their specific psychological makeup, street children, who have lacked close, comforting and trusting relationships and role models, require a classroom environment, atmosphere and a relationship with the educator which is supportive, caring, warm and firm. To achieve this a client centred approach was used based predominantly on the therapeutic principles of congruence, empathetic understanding and unconditional positive regard. The interaction with the children was based on openness, tolerance, the affirmation of others and honest firmness. The teaching methodology was an eclectic one which made use primarily of a cognitive teaching style which was introduced incrementally over the three cycles. The main components of this style consisted of cognitive questioning, cooperative learning and strategic reading for information. The results of the study showed that both the psychological and educational approach in the classroom to be very appropriate and successful. However the wider negative contextual influences such as the school organization, staffing and curriculum made the classroom strategies difficult to sustain. It is recommended that a programme using these educational and psychological approaches and incorporating functional literacy and numeracy, vocational skills, recreation and a therapeutic programme be incorporated when designing a programme for street children in a formal setting. / Psychology / D. Litt. et Phil. (Psychology) Unconditional positive regard Triangulation Teacher/learner relationship Student Centred Approach Street children Self-concept Resilience Research cycles Reconnaissance Reading for information strategy Qualitative Research Psychological and emotional trauma 'Pack' behaviour Mutual trust Learner behaviour Language for understanding Empathetic Egocentric Disadvantage Deprivation Cooperative Learning Congruency Cognitive Questioning Cognitive Teaching Style Classroom environment and atmosphere Classroom methodology Action Research 374.826945 Street children -- Education Action research in education Classroom management Teaching Teacher-student relationships
443	DU COMING OUT RECENT DES FILLES ET DES FEMMES (LESBIENNES, BISEXUELLES, AUTRES), A L’HETEROSYSTEME Horincq, Rosine 06 June 2017 (has links) (PDF) Cette recherche qualitative souhaite contribuer à une meilleure compréhension du phénomène du coming out récent, à partir des situations de filles et de femmes, lesbiennes, bisexuelles, autres, sans étiquette. Nous avons utilisé la Méthodologie de la Théorisation Enracinée, selon la Grounded Theory. De manière inductive, deux analyses ont été réalisées à partir des mêmes données, des vécus de ces personnes. L’une est structurelle, il s’agit de l’analyse de genre et l’autre est relationnelle, il s’agit de l’analyse systémique. La première a offert des théorisations sur l’hétérosexisme et l’hétéronormativité, reliés en système de l’hétérosexualité, obligatoire et exclusive. La seconde apporte une modélisation précisée des processus de rejet/acceptation parentaux aporétiques. Par la triangulation de ces deux analyses et de leurs résultats, une théorisation des processus même d’hétérosexualisation, structurels et relationnels, a pu être développée. Enfin, les résultats de la triangulation nous ont permis de proposer une approche critique du concept de la fluidité sexuelle, qui est utilisé de manière contemporaine, comme modèle usuel de compréhension des vécus de ces filles et de ces femmes. Pour finir, nous avons approfondi et recadré le concept même de triangulation en recherche qualitative. Notre recherche a présenté une circularité récurrente, tout au long du processus et une démarche réflexive intense. Cette dissertation doctorale en témoigne et se clôture par les principales contributions de notre étude, dans le champ de la recherche, ainsi que des recommandations en termes d’interventions psychologiques et thérapeutiques. / Doctorat en Sciences psychologiques et de l'éducation / info:eu-repo/semantics/nonPublished Etudes-femmes Méthodes de recherche en psychologie Psychologie Systèmes sociaux Psychothérapies Psychologie clinique Psychologie de l'adolescence Psychologie du développement age adulte Psychologie :théories et systèmes Psychologie politique
444	Active Shooter Mitigation for Open-Air Venues Braiden M Frantz (8072417) 04 August 2021 (has links) <p>This dissertation examines the impact of active shooters upon patrons attending large outdoor events. There has been a spike in shooters targeting densely populated spaces in recent years, to include open-air venues. The 2019 Gilroy Garlic Festival was selected for modeling replication using AnyLogic software to test various experiments designed to reduce casualties in the event of an active shooter situation. Through achievement of validation to produce identical outcomes of the real-world Gilroy Garlic Festival shooting, the researcher established a reliable foundational model for experimental purposes. This active shooter research project identifies the need for rapid response efforts to neutralize the shooter(s) as quickly as possible to minimize casualties. Key findings include the importance of armed officers patrolling event grounds to reduce response time, the need for adequate exits during emergency evacuations, incorporation of modern technology to identify the shooter’s location, and applicability of a 1:548 police to patron ratio.</p> Computer Software Adaptive Agents and Intelligent Robotics Computer Graphics Simulation and Modelling Computer-Human Interaction active shooter AnyLogic casualty rate casualty mitigation Gilroy first responder police patrolling drones reinforcement learning machine learning Pathmind security armed guard mass evacuation exit throughput dynamic signage emergency response shooter discharge rate movement speed agent logic mitigation gunshot triangulation shotspotter unmanned aerial systems
445	Převod trojúhelníkových polygonálních 3D sítí na 3D spline plochy / 3D Triangles Polygonal Mesh Conversion on 3D Spline Surfaces Jahn, Zdeněk Unknown Date (has links) In computer graphics we can handle unstructured triangular 3D meshes which are not too usable for processing through their irregularity. In these situations it occurs need of conversion that 3D mesh to more suitable representation. Some kind of 3D spline surface can be proper alternative because it institutes regularity in the form of control points grid and that's why it is more suitable for next processing. During conversion, which is described in this thesis, quadrilateral 3D mesh is constructed at first. This mesh has regular structure but mainly the structure corresponds to structure of control points grid of resulting 3D spline surface. Created quadrilateral 3D mesh can be saved and consequently used in specific modeling applications for T-spline surface creation.
446	A critical investigation of deaf comprehension of signed tv news interpretation Wehrmeyer, Jennifer Ella January 2013 (has links) This study investigates factors hampering comprehension of sign language interpretations rendered on South African TV news bulletins in terms of Deaf viewers’ expectancy norms and corpus analysis of authentic interpretations. The research fills a gap in the emerging discipline of Sign Language Interpreting Studies, specifically with reference to corpus studies. The study presents a new model for translation/interpretation evaluation based on the introduction of Grounded Theory (GT) into a reception-oriented model. The research question is addressed holistically in terms of target audience competencies and expectations, aspects of the physical setting, interpreters’ use of language and interpreting choices. The South African Deaf community are incorporated as experts into the assessment process, thereby empirically grounding the research within the socio-dynamic context of the target audience. Triangulation in data collection and analysis was provided by applying multiple mixed data collection methods, namely questionnaires, interviews, eye-tracking and corpus tools. The primary variables identified by the study are the small picture size and use of dialect. Secondary variables identified include inconsistent or inadequate use of non-manual features, incoherent or non-simultaneous mouthing, careless or incorrect sign execution, too fast signing, loss of visibility against skin or clothing, omission of vital elements of sentence structure, adherence to source language structures, meaningless additions, incorrect referencing, oversimplification and violations of Deaf norms of restructuring, information transfer, gatekeeping and third person interpreting. The identification of these factors allows the construction of a series of testable hypotheses, thereby providing a broad platform for further research. Apart from pioneering corpus-driven sign language interpreting research, the study makes significant contributions to present knowledge of evaluative models, interpreting strategies and norms and systems of transcription and annotation. / Linguistics / Thesis (D. Litt.et Phil. (Linguistics) Interpreting studies Grounded theory Descriptive translation studies Tertium comparationis Qualitative analysis Sign language interpreting Comprehension of sign language South African Sign Language Sign language interpreting studies Language variation Mouthing Interpreter signing skills Interpreter visibility Corpus-driven research Interpreting strategies Corpus design Corpus annotation Sign language transcription Deaf studies Questionnaire research Triangulation Eye-tracking Norms 418.02 South African Sign Language
447	A critical investigation of deaf comprehension of signed tv news interpretation Wehrmeyer, Jennifer Ella January 2013 (has links) This study investigates factors hampering comprehension of sign language interpretations rendered on South African TV news bulletins in terms of Deaf viewers’ expectancy norms and corpus analysis of authentic interpretations. The research fills a gap in the emerging discipline of Sign Language Interpreting Studies, specifically with reference to corpus studies. The study presents a new model for translation/interpretation evaluation based on the introduction of Grounded Theory (GT) into a reception-oriented model. The research question is addressed holistically in terms of target audience competencies and expectations, aspects of the physical setting, interpreters’ use of language and interpreting choices. The South African Deaf community are incorporated as experts into the assessment process, thereby empirically grounding the research within the socio-dynamic context of the target audience. Triangulation in data collection and analysis was provided by applying multiple mixed data collection methods, namely questionnaires, interviews, eye-tracking and corpus tools. The primary variables identified by the study are the small picture size and use of dialect. Secondary variables identified include inconsistent or inadequate use of non-manual features, incoherent or non-simultaneous mouthing, careless or incorrect sign execution, too fast signing, loss of visibility against skin or clothing, omission of vital elements of sentence structure, adherence to source language structures, meaningless additions, incorrect referencing, oversimplification and violations of Deaf norms of restructuring, information transfer, gatekeeping and third person interpreting. The identification of these factors allows the construction of a series of testable hypotheses, thereby providing a broad platform for further research. Apart from pioneering corpus-driven sign language interpreting research, the study makes significant contributions to present knowledge of evaluative models, interpreting strategies and norms and systems of transcription and annotation. / Linguistics and Modern Languages / Thesis (D. Litt.et Phil. (Linguistics) Interpreting studies Grounded theory Descriptive translation studies Tertium comparationis Qualitative analysis Sign language interpreting Comprehension of sign language South African Sign Language Sign language interpreting studies Language variation Mouthing Interpreter signing skills Interpreter visibility Corpus-driven research Interpreting strategies Corpus design Corpus annotation Sign language transcription Deaf studies Questionnaire research Triangulation Eye-tracking Norms 418.02 South African Sign Language

Page generated in 0.1 seconds