Sökning: "Kjell Andersson"

Visar resultat 6 - 10 av 21 avhandlingar innehållade orden Kjell Andersson.

  1. 6. Causes and Labor Market Consequences of Producer Heterogeneity

    Författare :Fredrik Andersson; Anders Forslund; Kjell G. Salvanes; Uppsala universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Economics; Nationalekonomi; Economics; Nationalekonomi; nationalekonomi; Economics;

    Sammanfattning : Essay I studies establishment-level employment changes in the Swedish Manufacturing sector over the 1972-96 period. The results show that modest changes in the aggregated employment record have been the resulting sum of rather large gross flows of jobs and that this constant reshuffling of jobs has important implications for the workforce and is closely related to process of economic growth. LÄS MER

  3. 7. A Co-Simulation Approach for Hydraulic Percussion Units

    Författare :Håkan Andersson; Daniel Leidermark; Kjell Simonsson; Daniel Hilding; Mikael Schill; Magnus Eek; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : This Licentiate of Engineering thesis concerns modelling and simulation of hydraulic percussion units. These units are often found in equipment for breaking or drilling in rock and concrete, and are also often driven by oil hydraulics, in which complex fluid-structure couplings are essential for their operation. LÄS MER

  4. 8. A Co-Simulation Tool Applied to Hydraulic Percussion Units

    Författare :Håkan Andersson; Daniel Leidermark; Kjell Simonsson; Joakim Holmberg; Pär Jonsén; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : In this dissertation, a co-simulation tool is presented that is meant to comprise a more comprehensive environment for modelling and simulation of hydraulic percussion units, which are used in hydraulic hammers and rock drills. These units generates the large impact forces, which are needed to demolish concrete structures in the construction industry or to fragment rock when drilling blast holes in mine drifting. LÄS MER

  5. 9. Laborativt arbete i fysikundervisningen : Något som behöver diskuteras!

    Författare :Jan Andersson; Margareta Enghag; Gunnar Jonsson; Kjell Magnusson; Peter Gustafsson; Karlstads universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Laborativt arbete; Fysikdidaktik; Kommunikation; Effektivitet; Laborationsformer; Physics; Fysik;

    Sammanfattning : BaksidestextI gymnasieskolans kursplaner för ämnet fysik framhålls det undersökande arbetssättet genom att betona att eleverna ska ges förutsättningar att utveckla förmågan att söka svar på frågor, planera, genomföra, tolka och redovisa experiment. Eleverna ska dessutom ges möjligheter att använda sina kunskaper i fysik för att kommunicera, argumentera och presentera slutsatser. LÄS MER

  7. 10. Model-based design of haptic devices

    Författare :Ahmad Aftab; Kjell Andersson; Ulf Sellgren; Per Wennhage; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Haptic device; model-based design; stiffness; SRA - ICT; SRA - Informations- och kommunikationsteknik;

    Sammanfattning : Efficient engineering design and development of high precision and reliable surgical simulators, like haptic devices for surgical training benefits from model-based and simulation driven design. The complexity of the design space, multi-domains, multicriteria requirements and multi-physics character of the behavior of such a product ask for a model based systematic approach for creating and validating compact and computationally efficient simulation models to be used for the design process. LÄS MER