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  • 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.
1

Virtual Reality som visualiseringsverktyg för ljusdesign / Virtual Reality as a visualization tool for lighting design

Kläboe, Niklas, Schreiber, Natalie January 2019 (has links)
The purpose of the study was to investigate Virtual Reality as a visualization tool for communicating light and lighting design in projects. In the study, we sought to answer whether there are differences in light and spatial experience between a VR model and a physical environment. The VR model was created on the basis of visual evaluations of a physical environment and was therefore not based on light technical parameters (illuminance, luminance etc.). The data was collected by conducting an experiment where 35 subjects were put in two groups, an experiment group (n=30) and a control group (n=5). The subjects gave numerical input through a leader-led questionnaire about their experience of light and spatial dimensions in the VR model and the physical environment. The results showed that there was no significant statistical difference between how the experiment group experienced the light in the VR model compared to the physical environment. The experiment group also considered that the spatial dimensions in the two environments were equal except for a minor deviation concerning how high/low they experienced the room. In the results, a difference can be seen in how test subject with and without knowledge of light evaluated the environments which suggests that there may be a deficiency in how design is communicated between people with knowledge of light and people without knowledge of light. Following these findings, the presenting method of visualizing light in VR seems very promising and should be seen as a basis for further practical use of the tool.
2

Vers des systèmes et outils de notation et de composition pour la musique électroacoustique / Towards notation and composition tools and systems for electroacoustic music

Meyssonnier, Thomas 02 November 2018 (has links)
Ce travail se situe dans le cadre de la recherche de systèmes de notation permettant de transcrire de façon symbolique l’aspect concret et sensoriel, et non seulement abstrait et structurel, des artefacts de la musique par ordinateur. Dans ce but, nous exposons tout d’abord un modèle formel complet et minimal des objets et structures audionumériques, en référence aux critères de la perception ; ce modèle est implémenté sous la forme d’un langage fonctionnel Turing-potent qui permet d’effectuer l’équivalence entre l’expression mathématique d’un signal et sa réalisation informatique. Puis, nous employons ce formalisme afin d’exprimer un ensemble de critères de synthèse sonore, ce qui donne lieu à un logiciel de synthèse dont l’expressivité est considérable. Ces outils sont organisés suivant le schéma des théories Schaefferiennes, par une décomposition catégorielle dans laquelle les paramètres correspondent à des notions morphologiques. Finalement, nous rendons compte d’une série d’expériences visant à évaluer la pertinence de ces critères dans l’audition humaine, avec le concours d’un musicologue, puis sur un ensemble de sujets, et enfin vis-à-vis d’un public aussi large que possible. Ceci nous conduit à remettre en question la méthodologie la plus adéquate pour traiter ce type de problème, qui nous rapproche des sciences humaines et sociales, et suggère une démarche de science participative. / This piece of work is situated in the context of research on notation systems enabled to transcribe symbolically the concrete and sensorial aspect, and not only the abstract and structural aspect, of computer music artefacts. In this perspective, we first expose a complete and minimal formal model for digital audio objects and structures, relatively to the criteria of perception ; this model is implemented as a Turing-potent functional language, that draws the correspondance between the mathematical expression of a signal and its computational realisation. Then, we apply this formal construction to the expression of a number of schemes for sound synthesis, producing a software synthetiser whose expressivity is consequent. These tools are organised following the lines of Schaefferian theories, through a decomposition into categories whose parameters correspond with morphological notions. Finally, we draw the conclusions of a series of experiments aiming to evaluate the relevance of those schemes in human hearing, with the assistance of a musicologist, then with a number of subjects, and eventually by associating a public that is as wide as possible. This leads us to question the methodology most appropriate to tackle this kind of problem, which brings us closer to social science, and suggests a participative science approach.
3

Modelování protokolů pro redundanci brány / Modelling Gateway Redundancy Protocols

Vítek, Petr January 2013 (has links)
This master's thesis report deals with the theoretical analysis of FHRP. First Hop Redundancy Protocols are network protocols which are designed to protect the default gateway and also to ensure high availability in the network by using redundancy. The reader becomes familiar with protocols VRRP, HSRP and GLBP and also learn the way how to configure them to on real Cisco devices. It also describes how implement VRRP int the simulated enviroment of OMNeT++. The result of the implementation is verified in the test topologies.

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