Sökning: "Fredrik Svahn"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden Fredrik Svahn.

1. 1. Digital Product Innovation : Building Generative Capability through Architectural Frames

   Författare :Fredrik Svahn; Ola Henfridsson; Jonny Holmström; Sandeep Purao; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; digital innovation; product innovation; generativity; modularity; patterns; architecture; architectural frames;

   Sammanfattning : Over the last decades we have witnessed a profound digitalization of tangible products. While this shift offers great opportunities, it also exposes product developing industries to significant challenges. LÄS MER

3. 2. Low-cost control of discontinuous systems including impacts and friction

   Författare :Fredrik Svahn; Annika Stensson Trigell; Harry Dankowicz; Jenny Jerrelind; Remco Leine; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; nonlinear dynamics; discontinuities; nonlinear control; impacts; friction; vehicle suspensions; Vehicle engineering; Farkostteknik;

   Sammanfattning : For a successful design of an engineering system it is essential to pay careful attention to its dynamic response. This is particularly true, in the case of nonlinear systems, since they can exhibit very complex dynamic behaviour, including multiple co-existing stable solutions and chaotic motions, characterized by large sensitivity to initial conditions. LÄS MER

4. 3. On the stability and control of piecewise-smooth dynamical systems with impacts and friction

   Författare :Fredrik Svahn; Annika Stensson Trigell; Harry Dankowicz; Jenny Jerrelind; Lawrie Virgin; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; non-smooth dynamics; nonlinear control; low-velocity impacts; friction; bifurcations; Solid mechanics; Fastkroppsmekanik;

   Sammanfattning : This thesis concerns the analysis of dynamical systems suitable to be modelled by piecewise-smooth differential equations. In such systems the continuous-in-time dynamics is interrupted by discrete-in-time jumps in the state or governing equations of motion. LÄS MER

5. 4. Tribology of Carbon Based Coatings for Machine Element Applications

   Författare :Fredrik Svahn; Åsa Kassman-Rudolphi; Sture Hogmark; Mats Larsson; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; Materialvetenskap; Materials science; Teknisk materialvetenskap;

   Sammanfattning : Demands on lower fuel consumption, reduced pollution, increased operating times, etc. force the automotive industry to constantly improve the performance of critical machine elements. In this development various carbon based coatings have proven very promising, mainly because of their low friction and high wear resistance in dry sliding contacts. LÄS MER

7. 5. Retande, berättelser och kategoriseringar : Om vänskap och kärlek i barns relationsprat

   Författare :Fredrik Andreasson; Ann-Carita Evaldsson; Johanna Svahn; Rickard Jonsson; Uppsala universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Peer interaction; relational talk; friendship; romantic relationships; teasing; storytelling; assessments; middle-school; ethnography; talk-in-interaction; conversation analysis; membership categorization analysis; Pedagogik; Education;

   Sammanfattning : This thesis focuses on how middle school children organize peer group relationships through various forms of so-called relational talk (Evaldsson, 2007), while they also negotiate and more generally make sense of friendships and romantic relationships. Prior micro-sociological research has demonstrated how children in everyday language practices through, for example, teasing, assessments, and storytelling—articulate and manage social relationships and behaviors, moral views, and shared cultural knowledge, thereby constructing their emerging social worlds (see Goodwin & Kyratzis, 2011, for an overview). LÄS MER