Sökning: "life-histories"

Visar resultat 1 - 5 av 59 avhandlingar innehållade ordet life-histories.

1. 1. Life histories and population dynamics

   Författare :Annie Jonsson; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : During the last decades there has been a growing interest and attention to random variation in population densities and their causes. It has been shown that even in constant environments (deterministic population growth) the dynamics of populations can display random like behaviour depending on parameter values. LÄS MER

3. 2. Tomorrow is yesterday: early-life conditions shape ectotherm life histories

   Författare :Alexander Hansson; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; life history; ectotherm; temperature; development; sex; telomere; senescence;

   Sammanfattning : Life history theory seeks to explain the overwhelming diversity of resource allocation strategies in nature by exploring how evolutionary forces optimise survival and reproduction within an organism’s environment. Central to this theory is that resources are finite, and thus increased investment into one trait may reduce resources available for another trait. LÄS MER

4. 3. Fri från narkotika : om kvinnor och män som har varit narkotikamissbrukare

   Författare :Arne Kristiansen; Umeå universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; drug abuse; addiction; life histories; life-style; identity; existential meaning-creating processes; gender; social change; social support; social work; recovery; solutions;

   Sammanfattning : The two aims of the study are to describe and analyse: i) how drug abusers have transformed their lives from the time when they did not use drugs, to becoming drug abusers, and finally leaving drugs behind them; and ii) what it means to be socially integrated with one's experience of having been a drug abuser. The study builds on qualitative research interviews with seven women and seven men. LÄS MER

5. 4. Engineering lives : Technology, time and space in a male-centred world

   Författare :Ulf Mellström; Linköpings universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ethnography; technology; engineering; MSc engineers; work; career; life-path; microculture; time; space; perspective; horizon; socialisation; masculinity; cars; integrated circuits; participant observation; life-histories; methodological eclecticism; INTERDISCIPLINARY RESEARCH AREAS; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN; Genus och teknik;

   Sammanfattning : This thesis deals with engineers. It is an ethnographic study of the life organisation for seventeen engineers with Master's degrees working at two different workplaces, Automobile Inc. and Microchips Inc. The study is based on participant observation and life-history interviews. LÄS MER

7. 5. Allocation of body resources to reproduction in butterflies

   Författare :Fredrik Stjernholm; Bengt Karlsson; Christer Wiklund; Jane K. Hill; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; Zoology; Ecology; Butterflies; Reproduction; Life histories; Trade-offs; Resource use; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi;

   Sammanfattning : The life-history of an organism can be studied and understood in terms of acquisition and expenditure of resources. In butterflies, the use of resources for reproduction has been the focus of much research due to the possibility to easily quantify both the input of resources from different sources over the life-cycle as well as the partitioning of these resources to reproduction. LÄS MER