Sökning: "occlusion"

Visar resultat 1 - 5 av 230 avhandlingar innehållade ordet occlusion.

  1. 1. 3D Occlusion Management and Causality Visualization

    Författare :Niklas Elmqvist; Chalmers University of Technology; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; causality; occlusion reduction; interaction techniques; visualization; occlusion management; information visualization; causal relations;

    Sammanfattning : This thesis is split into two parts: one part dealing with the management of occlusion in 3D environments, the other with the visualization of causal relations. Both of these parts fall within the general framework of visualization---the graphical representation of data (abstract or concrete) with the purpose of amplifying cognition---but they do so in different ways. LÄS MER

  2. 2. When, Where and What : The Development of Perceived Spatio-Temporal Continuity

    Författare :Olga Kochukhova; Claes Von Hofsten; Richard Aslin; Uppsala universitet; []
    Nyckelord :Psychology; infants; occlusion; incomplete visual information; saccadic gaze shifts; smooth pursuit; temporal; spatial; object representation; learning; extrapolation; Psykologi;

    Sammanfattning : This thesis explored the development of infants’ ability to preserve spatio-temporal continuity of moving objects in situations where they disappeared completely (Study I & II) or partially (Study III) behind other objects (occluders). We recorded infants gaze direction with the help of two different techniques: 1) infants’ gaze shifts in Study I were measured with electro-oculogram (EOG) in combination with a motion analyzing system (Qualisys) that recorded the reflected infrared light from markers placed on the infant’s head and the moving object; 2) in Studies II and III a cornea reflection eye tracker was used (Tobii 1750) . LÄS MER

  3. 3. Popliteal Artery Aneurysms : - epidemiology, treatment and results

    Författare :Anne Cervin; Martin Björck; Mårten Falkenberg; Hans Ravn; Michelle Antonello; Uppsala universitet; []
    Nyckelord :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Popliteal artery aneurysms; Endovascular; Open surgery; Outcome; Occlusion; Screening; Prevalence; Rupture; Surgery; Kirurgi;

    Sammanfattning : Popliteal aneurysms (PA) are limb threatening, since the aneurysm thrombose and emboli from the aneurysm sac occlude the distal vessels, resulting in chronic or acute limb ischaemia. Open surgical repair (OSR) has been challenged by endovascular repair (ER), a minimal invasive technique. LÄS MER

  4. 4. Ceramic Core–Shell Particles : Synthesis and Use within Dentistry

    Författare :Camilla Berg; Wei Xia; Håkan Engqvist; Nicola Döbelin; Uppsala universitet; []
    Nyckelord :Calcium phosphate; Core-shell particles; Substituting ions; Dentin hypersensitivity; Occlusion; Mineralization; Teknisk fysik med inriktning mot materialvetenskap; Engineering Science with specialization in Materials Science;

    Sammanfattning : Dentin hypersensitivity is one of the most prevalent conditions related to oral health, affecting a large share of the adult population. Shortcomings with the available treatment options are related to non-ideal particle sizes and degradation properties. LÄS MER

  5. 5. Infants’ Knowledge of Occluded Objects: Evidence of Early Spatiotemporal Representations

    Författare :Gustaf Gredebäck; Claes von Hofsten; Janette Atkinson; Uppsala universitet; []
    Nyckelord :SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; Psychology; infants; occlusion; gaze; object representations; temporal; spatial; associative rule; extrapolation; Psykologi; Psychology; Psykologi;

    Sammanfattning : This thesis demonstrates that infants represent temporarily non-visible, or occluded, objects. From 4 months of age, infants could accurately predict the reappearance of a moving object after 660 ms of non visibility; indicating accurate spatiotemporal representations. LÄS MER