Search for dissertations about: "Origin of life"

Showing result 1 - 5 of 265 swedish dissertations containing the words Origin of life.

  2. 1. Modelling Evolution : From non-life, to life, to a variety of life

    Author : Yu Liu; David J. T. Sumpter; Peter Dittrich; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Mathematical biology; Biocomplexity; Artificial chemistry; Ecosystem evolution; Origin of life; Self-replication; Prebiotic evolution; Collectively-catalytic; Golden ratio; Tillämpad matematik och statistik; Applied Mathematics and Statistics;

    Abstract : Life is able to replicate itself, e.g., a microorganism is able to divide into two identical ones, and a single plant is able to forest a whole island. READ MORE

  4. 2. A class of origin : The school class as a social context and health disparities in a life-course perspective

    Author : Ylva Almquist; Viveca Östberg; Michael Gähler; Bjørn Holstein; Stockholms universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Children; School class; Social structure; Social networks; Health inequalities; Longitudinal; Sociology; Sociologi; Sociology; sociologi;

    Abstract : The aim of the present thesis is to examine various aspects of the school-class structure and their links to health in a life-course perspective. The empirical studies are based on two longitudinal data materials of cohorts born in the 1950s, followed up until middle age. READ MORE

  5. 3. Power Games : Rules and Roles in Second Life

    Author : Maria Bäcke; Blekinge Tekniska högskola; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; HUMANIORA; HUMANITIES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; performance; role-play; Second Life; online worlds; virtual worlds; virtual; digital space; rules; hierarchies; subversion; power; negotiation; make-believe; Media and Communication Studies;

    Abstract : This study investigates how the members of four different role-playing communities on the online platform Second Life perform social as well as dramatic roles within their community. The trajectories of power influencing these roles are my main focus. READ MORE

  6. 4. The Origin of Tooth Replacement : Three-dimensional Synchrotron Histology Visualizes the Dental Development of Silurian Stem Osteichthyans

    Author : Donglei Chen; Per Ahlberg; Zerina Johanson; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Mechanisms of tooth replacement distribute incongruently among extant gnathostomes (jawed vertebrates): a permanent tooth-generating dental lamina exists in chondrichthyans (cartilaginous fish) and tetrapods but not teleosts, whereas tooth shedding by basal hard tissue resorption occurs in tetrapods and teleosts but not chondrichthyans. Theories about the evolution of tooth development have been biased towards the chondrichthyan conveyor-belt replacement, since there has been no fossil evidence for the origin of osteichthyan (bony fish and tetrapods) tooth replacement until now. READ MORE

  7. 5. Teachers’ lives in transition : gendered experiences of work and family among primary school teachers in northern Sweden, c. 1860–1940

    Author : Emil Marklund; Lotta Vikström; Glenn Sandström; Åsa Karlsson Sjögren; Johannes Westberg; Umeå universitet; []
    Keywords : HUMANIORA; HUMANITIES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; women teachers; family formation; fertility; social origin; socio-economic status; primary school teachers; life course; gender; professional life; private life; rural; Sweden; historia med utbildningsvetenskaplig inriktning; history of education;

    Abstract : In this thesis, primary school teachers in a coastal area of northern Sweden c. 1860–1940 are studied with the overarching purpose to investigate the link between professional work and private life. READ MORE