Sökning: "johan dahlberg"

Hittade 5 avhandlingar innehållade orden johan dahlberg.

  1. 1. The role of microclimate for the performance and distribution of forest plants

    Författare :C. Johan Dahlberg; Kristoffer Hylander; Johan Ehrlén; Jason D. Fridley; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; performance; microclimate; spatial scales; continental; landscape; distribution patterns; distribution limits; phenology; vegetative development; reproductive development; vital rates; population growth rate; vascular plants; bryophytes; distribution modelling; Plant Ecology; växtekologi;

    Sammanfattning : Microclimatic gradients may have large influence on individual vital rates and population growth rates of species, and limit their distributions. Therefore, I focused on the influence of microclimate on individual performance and distribution of species. LÄS MER

  3. 2. A numerical and experimental investifgation on surface and sub-surface initiation of contact fatigue cracks at cylindrical contacts

    Författare :Johan Dahlberg; Bo Alfredsson; Johas Ringsberg; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Other engineering mechanics; Övrig teknisk mekanik;

    Sammanfattning : .... LÄS MER

  4. 3. Parents, Children and Childbearing

    Författare :Johan Dahlberg; Juho Härkönen; Gunnar Andersson; Jennifer S. Barber; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Demography; Sociology; Fertility; Intergenerational transmission; Intergenerational influences; Social background; Parental death; Timing of first birth; Mode of delivery; Sibling correlation; Event history analysis; Childlessness; Sweden; sociologisk demografi; Sociological Demography;

    Sammanfattning : This doctoral thesis provides a set of studies of social influences on fertility timing. Swedish register data are used to link individuals to their parents and siblings, thereby allowing the study of impacts of family of origin, social background, and parental death on fertility. LÄS MER

  5. 4. Genetic Cartography at Massively Parallel Scale

    Författare :Johan Dahlberg; Ann-Christine Syvänen; Adam Ameur; Michael C. Zody; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Acute Lymphoblastic Leukemia ALL ; RNA-Sequencing; Bioinformatics; Pooling; Whole Genome Sequencing; Medicinsk genetik; Medical Genetics; Bioinformatics; Bioinformatik;

    Sammanfattning : Massively parallel sequencing (MPS) is revolutionizing genomics. In this work we use, refine, and develop new tools for the discipline.MPS has led to the discovery of multiple novel subtypes in Acute Lymphoblastic Leukemia (ALL). In Study I we screen for fusion genes in 134 pediatric ALL patients, including patients without an assigned subtype. LÄS MER

  7. 5. On the asperity point load mechanism for rolling contact fatigue

    Författare :Johan Dahlberg; Bo Alfredsson; Sören Sjöström; KTH; []
    Nyckelord :Rolling contact fatigue; Spalling; Asperity contact; Point load; Micro-cracks; Traction; Applied slip; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : Rolling contact fatigue is a damage process that may arise in mechanical applications with repeated rolling contacts. Some examples are: gears; cams; bearings; rail/wheel contacts. The resulting damage is often visible with the naked eye as millimeter sized surface craters. LÄS MER