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Hittade 5 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Projektsamtalets intersubjektivitet. Språkbruk och handlingsmöjligheter i byggprojekt

    Författare :Lars Göran Bergqvist; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; the rational dialogue; regulation of project dialogues; fundamen-tal concepts; learning projects; inter-subjectivity; programs; problem-oriented projects; possibilities of action; construction project; language usage;

    Sammanfattning : Against a background of projects carried out, the aim of this thesis is to investigate whatit is that regulates the project dialogue and how this can be described when applied tofacts and value assessments in the management of construction projects and the endusers’physical and perceived environments. This problem has partly involved testing astructure for describing concrete situations and partly investigating certain theoreticalprerequisites that can be assumed to exist in such a description. LÄS MER

  3. 2. On methods of measuring magnetic properties of power transformers

    Författare :Claes Carrander; Göran Engdahl; Anders Bergqvist; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; No-load; magnetizing current; losses; diagnostics; delta; three-phase; power transformer; magnetic core; electrical steel; measurements; simulation; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : The core of a power transformer can weigh hundreds of tons, and represents a significant part of the total ownership cost of the transformer, in terms of both the construction cost and of the monetary cost of losses. It is therefore desirable to have a method of diagnosing the core to ensure optimal performance, and to enable the operator to plan repairs of damaged or defective cores. LÄS MER

  4. 3. The Chevreton Superenergy Tensor in Einstein-Maxwell Spacetimes

    Författare :Ingemar Eriksson; Göran Bergqvist; Paul Todd; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Einstein-Maxwell; graviational energy; superenergy; Bel tensor; Chevreton tensor; conservation laws; Conformal Einstein space; Theory of relativity; gravitation; Relativitetsteori; gravitation;

    Sammanfattning : In this thesis we investigate the superenergy tensor that was introduced by Chevreton in 1964 as an electromagnetic counterpart to the Bel-Robinson tensor for the gravitational feld.We show that in Einstein-Maxwell spacetimes with a source-free electromagnetic feld, the Chevreton superenergy tensor has many interesting properties. LÄS MER

  5. 4. Dimensionally dependent identities and the Lanczos potential

    Författare :Anders Höglund; Göran Bergqvist; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : To antisymmetrize over more indices than the number of dimensions gives a dimensionally dependent identity. In this thesis such identities for tensors, spinors and matrices are discussed and some new results are presented which generalise earlier results of Lovelock. LÄS MER

  7. 5. Spinors, Clifford algebras and superenergy tensors

    Författare :Paul Lankinen; Göran Bergqvist; James Vickers; Mälardalens högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MATHEMATICS; MATEMATIK; Matematik tillämpad matematik;

    Sammanfattning : .... LÄS MER