Sökning: "Friction evolution"

Visar resultat 1 - 5 av 30 avhandlingar innehållade orden Friction evolution.

  1. 1. Franchising : Friktion mellan transnationella affärsmodeller och nationell särreglering

    Författare :Anders Fernlund; Frantzeska Papadopoulou; Mauro Zamboni; Bengt Domeij; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Franchising; Transnational business models; National legislation; Disclosure laws; Relationship laws; Friction rules; Legislative studies; Franchising; Transnationella affärsmodeller; Särreglering; Upplysningslagen; Relationslagar; Friktionsbestämmelser; Lagstiftningsforskning; Private Law; civilrätt;

    Sammanfattning : Business models are created by business people in order to achieve a purpose. If a business model is successful, it will be widely used and might become transnational, i.e., not limited by national borders. LÄS MER

  3. 2. Simulation of Wheel and Rail Profile Evolution : Wear Modelling and Validation

    Författare :Roger Enblom; KTH; []
    Nyckelord :contact; wear; wear prediction; wear model; wheel profile; rail profile; simulation vehicle-track interaction; multibody simulation; MBS; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : Numerical procedures for reliable wheel and rail wearprediction are rare. Recent development of simulationtechniques and computer power together with tribologicalknowledge do however suggest computer aided wear prediction. LÄS MER

  4. 3. Long-term rail damage evolution in railway crossings

    Författare :Rostyslav Skrypnyk; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; wear; S C; plasticity; wheel-rail contact mechanics; switches crossings; FEM; metamodel; Dynamic vehicle-track interaction;

    Sammanfattning : To accommodate the passage of wheels in intersecting traffic routes, fixed railway crossings have discontinuous rails leading to an intense load environment due to repeated wheel-rail impacts. This gives rise to high costs associated with repair and maintenance of the rails in the crossing. LÄS MER

  5. 4. Flow and Compression of Granulated Powders : The Accuracy of Discrete Element Simulations and Assessment of Tablet Microstructure

    Författare :Ann-Sofie Persson; Göran Frenning; Göran Alderborn; Marie Wahlgren; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Discrete Element Method; Granule; Flow; Angle of Repose; Discharge Rate; Shear; Rolling friction; Compression; Elastic deformation; Microstructure; Degree of compression; Tensile strength; Galenisk farmaci; Pharmaceutics;

    Sammanfattning : Simulations are powerful and important tools for gaining insight into powder processes. Ultimately, simulations have the potential to replace experiments. Thus, accurate models and insight into the essential factors for descriptions of powder behaviour are required. LÄS MER

  7. 5. Presence Design : Mediated Spaces Extending Architecture

    Författare :Charlie Gullström; Katja Grillner; Halina Dunin-Woyseth; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Architectural design and theory; presence design; presence research; mediated space; mediated presence; remote presence; mediated interaction; audiovisually extended architecture; media space; design friction; hybrid space; virtual space; tele presence; transdisciplinary; mutual gaze; mediated gaze; spatial montage; tertium quid; active spectatorship; shared mediated space; offscreen space; lateral and peripheral awareness; framing; transparency.; Architecture; Arkitektur; Human communication; Kommunikation mellan människor; Telecommunication; Telekommunikation; Media and communication studies; Medie- och kommunikationsvetenskap;

    Sammanfattning : This thesis is a contribution to design-led research and addresses a readership in the fields of architecture as well as in media and communications. In juxtaposing the tools of the designer (e.g. LÄS MER