Search for dissertations about: "Göran Bergqvist"
Found 4 swedish dissertations containing the words Göran Bergqvist.
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1. On methods of measuring magnetic properties of power transformers
Abstract : 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. READ MORE
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2. The Chevreton Superenergy Tensor in Einstein-Maxwell Spacetimes
Abstract : 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. READ MORE
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3. Dimensionally dependent identities and the Lanczos potential
Abstract : 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. READ MORE
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4. Spinors, Clifford algebras and superenergy tensors
Abstract : .... READ MORE