Sökning: "General topology"

Visar resultat 1 - 5 av 101 avhandlingar innehållade orden General topology.

  1. 1. Contributions to Pointfree Topology and Apartness Spaces

    Författare :Anton Hedin; Erik Palmgren; Viggo Stoltenberg-Hansen; Peter Schuster; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Constructive mathematics; General topology; Pointfree topology; Domain theory; Interval analysis; Apartness spaces; Mathematical logic; Matematisk logik; Mathematical Logic; Matematisk logik;

    Sammanfattning : The work in this thesis contains some contributions to constructive point-free topology and the theory of apartness spaces. The first two papers deal with constructive domain theory using formal topology. LÄS MER

  2. 2. Extensions of general relativity : scalar tensor theory, topology of space-time and supergravity

    Författare :Ulf Lindström; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : .... LÄS MER

  3. 3. Dual-topology membrane proteins in Escherichia coli

    Författare :Susanna Seppälä; Gunnar von Heijne; Dirk Jan Slotboom; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; membrane protein topology; dual-topology; evolution; Escherichia coli; biokemi; Biochemistry;

    Sammanfattning : Cellular life, as we know it, is absolutely dependent on biological membranes; remarkable superstructures made of lipids and proteins. For example, all living cells are surrounded by at least one membrane that protects the cell and holds it together. LÄS MER

  4. 4. Topology optimization of vehicle structures

    Författare :Torbjörn Johansen; Linköpings universitet; []
    Nyckelord :topology optimization; frame structure; vehicle structure; flexible joint; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : This thesis concerns topology optimization of vehicle structures. Vehicle structures are considered to be composed of beams joined together and the work has been focused on a method for beam topology optimization including joints. LÄS MER

  5. 5. Topology optimization of antennas and waveguide transitions

    Författare :Emadeldeen Hassan; Martin Berggren; Daniel Noreland; Eddie Wadbro; Mats Gustafsson; Umeå universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Maxwell s equations; topology optimization; antennas; waveguide transition; finite-difference time-domain; gradient-based optimization; adjoint-field problem; microwave devices.; business data processing; administrativ databehandling;

    Sammanfattning : This thesis introduces a topology optimization approach to design, from scratch, efficient microwave devices, such as antennas and waveguide transitions. The design of these devices is formulated as a general optimization problem that aims to build the whole layout of the device in order to extremize a chosen objective function. LÄS MER