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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

A real-time high performance universal colour transformation hardware system

Swenson, Rick L. January 2000 (has links)
No description available.
2

A machine’s idea of sight: the technico-sensory divide in the human use of imaging devices

Dean, Adam 12 April 2013 (has links)
This study explores the human and technical limitations of looking and seeing. It proposes a model for design that expands technical sight toward harmony with our human notion. It proposes a model for design that expands technical sight toward harmony with our human notion. This study is guided by the phenomenological experience of being expressed primarily by Heidegger as well as neuro-physiological research on the mind and body relationship by Ramachandran, Sacks Nicolelis and Damasio. It examines, in two paths, the technical developments that seek to alter or enhance our ways of looking and seeing. The first path is an assessment of ways of looking with optics-based cameras that includes how cameras might be set to look, how they behave in looking and how they translate that look into an image on display. The second path is an assessment of the image in varying states of readiness which include the capture state, state of rendering (for view) and state of display. The study uncovers the various ways that images are translated to be seen, and how sight and ocular vision might be detached in the process of imprinting what is seen in the imagination. It includes key examples of modern image device capabilities, makes suggestions about how the framework of this study can be applied in specific cases and predicts the state of image devices in the future.
3

Contribution à l'étude des propriétés optiques des métamatériaux hyperboliques / Contribution to the study of the optical properties of hyperbolic metamaterials

Benedicto, Jessica 04 December 2013 (has links)
A la fin des années 80, ont été introduits les cristaux photoniques et les métamatériaux, permettant de concevoir des dispositifs avec des propriétés optiques très intéressantes. La découverte de ces propriétés artificielles est considérée comme l’une des avancées les plus spectaculaires de la photonique moderne, avec des applications importantes telles que la création de matériaux à réfraction négative, ou la conception de lentilles plates parfaites. Ces structures présentent néanmoins des pertes optiques dues aux métaux qui rendent plus difficile l’obtention de lentilles super-résolues. Une nouvelle approche, basée sur l’anisotropie du métamatériau, a alors été proposée comme une alternative très intéressante pour la conception de lentilles plates à super-résolution. Parallèlement les limites du modèle de Drude pour la description de la réponse optique des métaux ont été mises en évidence expérimentalement. Ce manuscrit de thèse présente une étude théorique et numérique d’empilements de couches minces métallo-diélectriques se comportant dans certains domaines de fonctionnement comme des milieux hyperboliques. Après avoir étudié le lien existant entre la réfraction négative et les décalages géants, le manuscrit se concentre sur la conception de lentilles plates permettant d’obtenir de la super-résolution : des images offrant une meilleure résolution que celle permise par les lois de la diffraction classique. Pour répondre à ces objectifs, nous avons développé une théorie basée sur l’approximation du milieu hyperbolique (obtenue avec un empilement métallo-diélectrique) par un milieu isotrope effectif à l’aide d’un développement parabolique du vecteur d’onde de Bloch. Les outils nécessaires pour toute étude de l’influence de la non-localité intrinsèque des métaux sur les propriétés optiques des structures sont ensuite développés et appliqués aux métallo-diélectriques. / In the early 80’s, planar or periodic photonics crystals have been introduced in order to control light and to obtain entirely new optical properties. The unrivalled properties of these metamaterials are of tremendous interest for advanced photonic systems, with some important applications such as materials with negative refraction or flat lenses. However, these structures present optical losses induced by metals defects and experimental fabrication at nanometric scales that prevent them to reach the expected performances. A new approach based on describing metallo-dielectric as anisotropic materials has then been proposed as an alternative description. In parallel, the limits of the Drude model have been experimentally highligthed. In this context this manuscript presents a theoretical and numerical study of metallo-dielectric multilayers that can be considered as homogeneous media with a hyperbolic dispersion relation. We first present the link between negative refraction and large negative lateral shifts, and then focus on the design of flat lenses with subwavelength resolution : structures allowing a better resolution than the classical diffraction limit. We thus developed a theory based on the approximation of the hyperbolic medium, by a homogeneous and isotropic medium with a parabolic development of the vector of wave of Bloch. Finally, the tools required to study the influence of the intrinsic nonlocality of metals on the optical properties of multilayers are developped and the formalism is applied to metallo-dielectric lenses.
4

Biomechanická studie ruky / Biomechanical study of hand

Krpalek, David Unknown Date (has links)
This work deals with issue of human wrist and appropriate total wrist implant allowing a restoration of hand mobility approaching physiological condition after traumatic and degenerative diseases. Treating these diseases are very complex. These issues including a biological and medical issues. To determine the appropriate treatment method and select right total wrist implant is important to know the behavior the human wrist at all stages in terms of medical and biomechanical. For this reason, it was developed a biomechanical study including computation model of human wrist allowing solution of strain and stress of hand in physiological and pathological conditions and condition after total wrist implant. The frost remodeling of bone tissue was used for analysis of human wrist bone tissues and bone tissues after application of total wrist implant RE-MOTION™ Total Wrist.
5

Biomechanická studie ruky / Biomechanical Study of Hand

Krpalek, David January 2016 (has links)
This work deals with issue of human wrist and appropriate total wrist implant allowing a restoration of hand mobility approaching physiological condition after traumatic and degenerative diseases. Treating these diseases are very complex. These issues including a biological and medical issues. To determine the appropriate treatment method and select right total wrist implant is important to know the behavior the human wrist at all stages in terms of medical and biomechanical. For this reason, it was developed a biomechanical study including computation model of human wrist allowing solution of strain and stress of hand in physiological and pathological conditions and condition after total wrist implant. The frost remodeling of bone tissue was used for analysis of human wrist bone tissues and bone tissues after application of total wrist implant RE-MOTION™ Total Wrist.

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