Search for dissertations about: "insulators"

Showing result 1 - 5 of 88 swedish dissertations containing the word insulators.

2. 1. Long-term exposure of polymeric insulators to coastal contamination at Anneberg test station

   Author : Torbjörn Sörqvist; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SIR insulators; polymeric insulators; EPDM rubber insulators; leakage currents; dry-bands; hydrophobicity; flashovers;

   Abstract : .... READ MORE

4. 2. Diagnostic Methods for Composite Insulators with Biological Growth

   Author : Andreas Dernfalk; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; algae; composite insulators; Hough transform; biological contamination; outdoor insulation; digital image analysis; laser-induced fluorescence LIF ; fungi; diagnostic methods;

   Abstract : Composite insulators have a number of advantages compared to conventional insulators, but the fact that they are more prone to aging is a major drawback. For instance, biological growths, like algae and fungi, have been found to colonize composite insulators, and possibly effecting the insulation performance. READ MORE

5. 3. Image Analysis for Diagnostics of Insulators with Biological Contamination

   Author : Andreas Dernfalk; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; climate chamber; fungi; composite insulators; biological contamination; digital image analysis; Outdoor insulation; algae; leakage current measurements;

   Abstract : Composite insulators have a number of advantages compared to conventional insulators. However, the fact that they are more prone to aging is a major drawback. For instance, biological growths, like algae and fungi, have been found to colonize composite insulators, and possibly effecting the performance of the materials. READ MORE

6. 4. Silicone Rubber Insulators: Impacts of Material Formulation in Coastal Environment

   Author : Tomas G Gustavsson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; surface characterization; aging; filler level; outdoor insulation; leakage current measurements; material formulation; silicone rubber; polymeric insulators; coastal environment; polydimethylsiloxane PDMS ;

   Abstract : This thesis deals with influences of material formulation on the performance of silicone rubber high voltage insulators in a coastal environment. Samples and insulators with known differences in material compositions have been used in this task. In the first step, a screening test with cylindrical samples was initiated. READ MORE

7. 5. BEN-solo proteins in genome architecture and function

   Author : Malin Ueberschär; Qi Dai; Mattias Mannervik; Nicola Iovino; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; gene regulation; transcription; insulators; genome architecture; Polymerase II pausing; chromatin; Drosophila development; molekylär biovetenskap; Molecular Bioscience;

   Abstract : Eukaryotic genomes are organized in a complex manner inside the nucleus of each cell. Chromatin insulators are DNA elements that help to fold the linear DNA fiber in three-dimensional space and partition regulatory gene units. READ MORE