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Showing result 1 - 5 of 545 swedish dissertations matching the above criteria.

2. 1. Cold lap formation in Gas Metal Arc Welding of steel : An experimental study of micro-lack of fusion defects

   Author : Peigang Li; Lars-Erik Svensson; Norbert Enzinger; Högskolan Väst; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Tandem GMAW; old laps; lack of fusion; Spatter; Overlap; Overflow; Manganese; Silicon; Oxides; Temperature; Manufacturing and materials engineering; Produktions- och materialteknik;

   Abstract : Cold laps are defined as micro-lack of fusion defects at the weld toe more or less parallel to the surface of the parent plate. These defects are known to negatively influence the fatigue properties of weldments. Previous studies suggest that cold lap formation can not be avoided completely in Gas Metal Arc Welding (GMAW). READ MORE

4. 2. Coping with boundaries - A study on the interaction between work and non-work life in home-based telework

   Author : Camilla Kylin; Gunn Johansson; Jan Ch Karlsson; Eva Magnusson; Stockholms universitet; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Work and non-work interaction; boundaries; overlap; home-based telework; social roles; conflict; enhancement; facilitation; stress; coping; health; Psychology; Psykologi; psykologi; Psychology;

   Abstract : The increase of women’s labor force participation, the diversity of family constellations, many men’s increased participation in childcare, and the development of flexible working arrangements have stimulated research on the relationship between work and non-work. In this thesis, the interaction between work and non-work is examined in the case of home-based telework, an example of flexible working arrangement. READ MORE

5. 3. Experimental Study on Cold Lap Formation in Tandem Gas Metal Arc Welding

   Author : Peigang Li; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; oxides; imperfection; spatter; silicon; lack of fusion; overflow; temperature energy; overlap; cold lap; manganese; tandem GMAW;

   Abstract : Tandem gas metal arc welding (GMAW) is a high productivity welding process which is appliedin many industries. However, a type of imperfection, known as cold lap, was revealed thatmostly accompanies the tandem GMAW process. READ MORE

6. 4. Brain activity associated with episodic memory : similarities and differences between encoding and retrieval

   Author : Jonas Persson; Umeå universitet; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Episodic memory; encoding; retrieval; positron emission tomography PET ; enactment; overlap; retrieval mode; retrieval success; novelty;

   Abstract : Understanding the mnemonic functions of the brain has been extensively facilitated by the development of functional neuroimaging techniques such as positron emission tomography (PET) and functional magnetic resonance imaging (fMRI). The present thesis aims at investigating the neural mechanisms underlying memory for personally experienced events (episodic memory), using PET. READ MORE

7. 5. Species interactions in streams - effects of predation, competition and ecosystem properties

   Author : Erika Nilsson; Biologiska institutionen; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; behaviour; species abundance; stable isotopes; habitat complexity; niche width; niche overlap; competition; streams; predation;

   Abstract : Stream ecosystems are dynamic and they have an inherent environmental variability. Organisms that live in streams are adapted to the continuously changing environment and the presence or absence of species are determined by their environmental requirements, while abundance is most often affected by interactions, such as competition and predation, with other species that are found in the same habitat. READ MORE