Sökning: "digital geometry"

Visar resultat 21 - 25 av 162 avhandlingar innehållade orden digital geometry.

  1. 21. Distance Functions and Image Processing on Point-Lattices : with focus on the 3D face- and body-centered cubic grids

    Författare :Robin Strand; Gunilla Borgefors; Stina Svensson; Christer Kiselman; David Coeurjolly; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Computerized image analysis; digital geometry; distance functions; non-standard grids; point-lattices; Image analysis; Bildanalys;

    Sammanfattning : There are many imaging techniques that generate three-dimensional volume images today. With higher precision in the image acquisition equipment, storing and processing these images require increasing amount of data processing capacity. Traditionally, three-dimensional images are represented by cubic (or cuboid) picture elements on a cubic grid. LÄS MER

  3. 22. A teacher-centred design system to integrate digital technologies in secondary mathematics classrooms

    Författare :Miguel Perez; Marianna Bosch; John Monaghan; Linnéuniversitetet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Design; digital technologies; praxeology; teachers; professional development; inquiry systems; agile educational design; Mathematical Education; Matematikdidaktik;

    Sammanfattning : Despite efforts made by teachers and researchers, studies show that digital technologies have not improved conditions for teaching and learning mathematics to the degree expected by stakeholders inside as well as outside the school system.In this research, the problem of the integration of digital technologies is addressed through the perspective of design. LÄS MER

  4. 23. Field Theories and Vortices with Nontrivial Geometry

    Författare :Kristel Torokoff; Antti Niemi; Masud Chaichian; Uppsala universitet; []
    Nyckelord :Theoretical physics; theoretical physics; gauge field theory; knot theory; spontaneously broken symmetry; effective model; numerical calculation; soliton; vortex; electromagnetic plasma; Teoretisk fysik;

    Sammanfattning : This thesis investigates aspects of field theories and soliton solutions with nontrivial topology. In particular we explore the following effective models: a limited sector of the scalar Electroweak theory called extended Abelian Higgs model, and a classical mechanics model derived from the low energy SU(2) Yang-Mills theory. LÄS MER

  5. 24. Ice Formwork : The Rationale and Potential of Ice-Based Moulding Systems  for the Production of Complex-Geometry  Precast Concrete

    Författare :Vasily Sitnikov; Oliver Tessmann; Tim Ainsworth Anstey; Harald Kloft; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ice Formwork; High-Performance Concrete; Digital Fabrication; Refrigeration; Embodied Energy; Grey energy; Carbon Footprint.; Architectural Technology; Arkitekturteknik;

    Sammanfattning : This doctoral thesis analyses and makes proposals about adapting the poten-tial of digital means of production to the needs of the concrete industry. More precisely, it aims at fostering the development of sustainable material cycles and the innovation in manufacturing methods in the field of architectural and structural design of ultra-high performance fibre-reinforced concrete (UHPFRC). LÄS MER

  7. 25. The Complex World of Superstrings : On Semichiral Sigma Models and N=(4,4) Supersymmetry

    Författare :Malin Göteman; Ulf Lindström; Daniel Waldram; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Non-linear sigma models; extended supersymmetry; semichiral superfields; neutral hyperkähler geometry; generalized Kähler geometry; T-duality; vector multiplets; Theoretical Physics; Teoretisk fysik;

    Sammanfattning : Non-linear sigma models with extended supersymmetry have constrained target space geometries, and can serve as effective tools for investigating and constructing new geometries. Analyzing the geometrical and topological properties of sigma models is necessary to understand the underlying structures of string theory. LÄS MER