Sökning: "Stefan Eriksson"

Visar resultat 6 - 10 av 36 avhandlingar innehållade orden Stefan Eriksson.

  1. 6. The Persistence of Unemployment: Does Competition between Employed and Unemployed Job Applicants Matter?

    Författare :Stefan Eriksson; Michael C. Burda; Uppsala universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Economics; Nationalekonomi; Economics; Nationalekonomi; nationalekonomi; Economics;

    Sammanfattning : This thesis consists of four self-contained essaysEssay 1 (with Nils Gottfries) investigates why unemployment is so persistent in Europe. We formulate an efficiency wage model with on-the-job search where wages depend on turnover and employers may use information on whether the searching worker is employed or unemployed as a hiring criterion. LÄS MER

  3. 7. Multiphase models for freeze-thaw actions and mass transport in concrete hydraulic structures

    Författare :Daniel Eriksson; Anders Ansell; Richard Malm; Erik Nordström; Stefan Jacobsen; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Degradation; Hydraulic structures; Air-entrained concrete; Multiphase models; Multiphysics; Long-term moisture conditions; Freeze-thaw; Hysteresis; Absorption; Calcium leaching; Finite Element Method; Concrete Structures; Betongbyggnad;

    Sammanfattning : A crucial task for civil engineers is to make appropriate designs of new concrete structures and assessments of existing structures to ensure a long service life and sustainable use of the infrastructure. This doctoral thesis aims to increase the understanding of how advanced mathematical models can be used to describe phenomena and processes governing concrete degradation and thereby ultimately contribute to improving tools for design and assessments. LÄS MER

  4. 8. Problems and experiments in cone-beam tomography

    Författare :Jan Eriksson; Stefan Challer; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : Two-dimensional detectors for cone-beam exposure are now introduced in medical as well as industrial computer tomography. This thesis starts with a review of basic 2D reconstruction algorithms and the first proposal for cone-beam tomography due to Feldkamp et al.Exact reconstruction is possible only if complete projection data are avail­ able. LÄS MER

  5. 9. Adipocyte-derived hormones and cardiovascular disease

    Författare :Maria Eriksson; Stefan Söderberg; Tommy Olsson; Lena Jonasson; Umeå universitet; []
    Nyckelord :leptin; adiponectin; fibrinolysis; vWF; myocardial infarction; sex differences; physical activity; risk factors;

    Sammanfattning : Obesity is increasing globally and related to major changes in lifestyle. This increase is associated with an increased risk of cardiovascular disease (CVD). Knowledge about adipose tissue as a metabolic-endocrine organ has increased during the last few decades. LÄS MER

  7. 10. Video based analysis and visualization of human action

    Författare :Martin Eriksson; Stefan Carlsson; Ian Reid; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Människa-dator-interaktion; Motion analysis; Visualization; Human tracking; virtual coach; Människa-dator-interaktion; Information technology; Informationsteknologi;

    Sammanfattning : Analyzing human motion is important in a number of ways. An athlete constantly needs to evaluate minute details about his or her motion pattern. In physical rehabilitation, the doctor needs to evaluate how well a patient is rehabilitating from injuries. Some systems are being developed in order to identify people only based on their gait. LÄS MER