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Visar resultat 1 - 5 av 11 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Torque and Angle Controlled Tightening of Bolted Joints

   Författare :Göran Toth; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; torque controlled tightening; deformation parameters; momentary elongation; deformation factor; torque; Bolted screwed joints; spring characteristic; Torx; torque and angle controlled tightening; hexalobular; final torque; snug torque; Taylor’s series expansions; preload; plastic deformation; permanent elongation; yield; friction diameter; plastic spring constant; clevis; turn-of-nut method; bearing surface pressure; twisting; Monte-Carlo simulations;

   Sammanfattning : Reduced weight and fuel consumption, improved reliability and engine performance are the main requirements in the automotive industry of today. These requirements demand robust and optimized bolted joints, where a high amount of preload obtained by effective utilisation of the bolt is essential. LÄS MER

3. 2. Moisture Influence on Structural Behaviour of Pavements : Field and Laboratory Investigations

   Författare :Farhad Salour; Sigurdur Erlingsson; Guy Doré; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Falling Weight Deflectometer FWD ; backcalculation; unbound material; subgrade; seasonal variation; moisture content; spring-thaw; drainage; pavement stiffness; field test; pavement instrumentation; resilient modulus; permanent deformation; repeated load triaxial test; unsaturated soil; matric suction.; Civil and Architectural Engineering; Byggvetenskap; Transportvetenskap; Transport Science;

   Sammanfattning : The structural behaviour of pavements in cold regions can considerably be affected by seasonal variation in environmental factors such as temperature and moisture content. Along with the destructive effect of heavy traffic loads, climatic and environmental factors can considerably contribute to pavement deterioration. LÄS MER

4. 3. Dynamics of Polymer Adsorption onto Solid Surfaces in Good Solvent

   Författare :Niklas Källrot; Fysikalisk kemi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : Adsorption dynamics of various types of uncharged homopolymers onto solid surfaces in good solvent have been studied by using a coarse grained bead-spring model. Brownian dynamics simulation has been used to examine the adsorption process for polymers released near an adsorbing surface, and Monte Carlo simulations have been employed to explore equilibrium properties of adsorbed polymers. LÄS MER

5. 4. Rituell process, tradition och media : Socialdemokratisk första maj i Stockholm

   Författare :Jonas Engman; Anne Eriksen; Stockholms universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; Ritual; Demonstration; Carnival; Symbol; Trope; Tradition; Social Democracy; May Day; Labour Movement; Ambivalence; Ethnology; etnologi;

   Sammanfattning : This dissertation's initial proposition is that political ideology can be embodied in ritual form. The use of Social Democrat May Day demonstrations - a political procession similar to parades - in Stockholm as a tool for creating ideology, and to both maintain and disseminate Social Democratic ideology is analysed. LÄS MER

7. 5. Handlingar i matematikklassrummet : En studie av undervisningsverksamheter på lågstadiet då räknemetoder för addition och subtraktion är i fokus

   Författare :Margareta Engvall; Joakim Samuelsson; Karin Forslund Frykedal; Astrid Pettersson; Linköpings universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Mathematics classroom; mathematics teaching; mathematics competence; possible learning; classroom culture; classroom communication; manipulatives; teaching strategies; activity theory; mathematics education; Matematikklassrum; matematikundervisning; matematisk kompetens; möjligt lärande; klassrumskultur; klassrumskommunikation; laborativt material; arbetsformer; verksamhetsteori; matematikdidaktik;

   Sammanfattning : Syftet med avhandlingen är att beskriva, analysera och förstå matematikundervisning på lågstadiet. Mer precist är syftet att undersöka vad denna undervisning ger elever i några klassrum möjlighet att lära då undervisningsinnehållet är skriftliga räknemetoder för addition och  ubtraktion. LÄS MER