Sökning: "weak section"

Visar resultat 1 - 5 av 34 avhandlingar innehållade orden weak section.

  1. 1. Modelling the Variability of Bending Strength in Structural Timber - Length and Load Configuration Effects

    Författare :Tord Isaksson; Avdelningen för Konstruktionsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; code; reliability-based design; Weibull; test standard; load configuration effect; length effect; weak section; machine grading; visual grading; variability; Structural timber; bending strength; simulation; monte carlo simulation.; Building construction; Byggnadsteknik;

    Sammanfattning : The load carrying capacity of a beam of structural timber is dependent both on the span of the beam and the type of loading. The longer the beam and the more uniform the moment distribution, the lower the load carrying capacity. This phenomenon is due to the variability of material properties within a piece of timber. LÄS MER

  2. 2. Estimation and Testing in Panel Data with Cross-Section Dependence

    Författare :Simon Reese; Nationalekonomiska institutionen; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Factor-augmented panel regression; CCE estimation; cross-section dependence; common factor models; Factor-augmented panel regression; CCE estimation; cross-section dependence; common factor models;

    Sammanfattning : This thesis makes a contribution the econometrics of panel data with cross-section dependence (CSD). It consists of five self-contained papers. LÄS MER

  3. 3. Vitamin D, muscle strength, prolonged labour, Caesarean sections and lifestyle : Clinical and intervention studies in pregnant Somali and Swedish women and new mothers

    Författare :Paul Kalliokoski; Monica Löfvander; Maria Bullarbo; Uppsala universitet; []
    Nyckelord :: caesarean section; dystocia; immigrant; muscle strength; obstetric labour complications; osteomalacia; physical performance; Somalia; vitamin D; vitamin D deficiency; Family Medicine; Allmänmedicin;

    Sammanfattning : Long-term severe vitamin D deficiency may cause osteomalacia with muscle weakness, pain, soft bones, cramps and eventually death. In a pilot study, I found many Somali women to be vitamin D deficient and very weak. LÄS MER

  4. 4. The Aspirants : How faith is built in emerging occupations

    Författare :Rebecca Ye; Charlotta Stern; Mikaela Sundberg; Phillip Brown; Stockholms universitet; []
    Nyckelord :SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; weak-form occupations; transitions; temporality; anticipation; career scripts; projections; school culture; higher vocational education and training; yrkeshögskola; Sociology; sociologi;

    Sammanfattning : Anticipating future demands in skills and workforce development has been a longstanding practice and challenge for governments and policy-makers. While such developments are examined closely at the national and regional levels, an even more pressing issue is to advance our understanding of how people who take on jobs in new and emerging fields embark on and persist in their occupational pathways. LÄS MER

  5. 5. Mesoscopic phenomena in the electromechanics of suspended nanowires

    Författare :Gustav Sonne; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nanoelectromechanical systems; Ground-state cooling; Superconducting weak links; Carbon nanotubes; Non-linear resonance;

    Sammanfattning : Over the last two decades nanotechnology has been a very active field of scientific research, both from fundamental perspectives as well as for applications in technology and consumer goods. In this thesis, theoretical work on quantum mechanical effects on charge transport in nanoelectromechanical systems is presented. LÄS MER