Sökning: "burrows"

Visar resultat 1 - 5 av 9 avhandlingar innehållade ordet burrows.

1. 1. Suicide mortality in the South African context : exploring the role of social status and environmental circumstances

   Författare :Stephanie Burrows; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :Suicide; transition; socio-demographic groups; context;

   Sammanfattning : Suicide is a serious public health problem worldwide, but is differentially distributed across social groups and regions. The goal of this thesis, focusing on the post-apartheid transitional setting of South Africa, is to advance knowledge of the relationship between individual social status (race and sex), contextual factors and suicide mortality. LÄS MER

3. 2. Photospheric emission in gamma ray bursts : Analysis and interpretation of observations made by the Fermi gamma ray space telescope

   Författare :Shabnam Iyyani; Felix Ryde; David Burrows; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; gamma ray bursts; photosphere; radiation mechanism; Theoretical Physics; teoretisk fysik;

   Sammanfattning : The large flashes of radiation that are observed in GRBs are generally believed to arise in a relativistic jetted outflow. This thesis addresses the question of how and where in the jet this radiation is produced. LÄS MER

4. 3. Structures of String Matching and Data Compression

   Författare :N Jesper Larsson; Institutionen för datavetenskap; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Implementation; Burrows-Wheeler Transform; Sliding Window; Suffix Sorting; Text Compression; Algorithms; Suffix Tree; Systems engineering; computer technology; Data- och systemvetenskap;

   Sammanfattning : This doctoral dissertation presents a range of results concerning efficient algorithms and data structures for string processing, including several schemes contributing to sequential data compression. It comprises both theoretic results and practical implementations. LÄS MER

5. 4. The role of benthic macrofauna in nitrogen cycling in eutrophic lake sediment

   Författare :Jonas Martin Svensson; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; nitrogen retention; nitrous oxide; oligochaetes; chironomids; mineralisation; nitrification; denitrification; eutrophic; sediment; lake; Macrofauna; nitrogen cycling; fish reduction.; Ecology; Ekologi;

   Sammanfattning : This thesis concerns the role of sediment-living macrobenthos in the cycling of nitrogen species and nitrogen transformation in eutrophic freshwater sediments. In my thesis I have, employing 15N-isotope techniques in laboratory experiments, shown the importance of infaunal chironomid larvae and oligochaetes on denitrification in eutrophic lake sediments. LÄS MER

7. 5. Middle ordovician conodonts from the Atlantic faunal region and the evolution of key conodont genera

   Författare :Jianhua Zhang; Anita Löfgren; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Conodonts; Middle Ordovician; Biostratigraphy and lithofacies; Evolution; Atlantic Faunal Region; Earth sciences; Geovetenskap; allmän och historisk geologi; General and Historical Geology;

   Sammanfattning : This thesis consists of seven separate articles that are mainly concerned with Middle Ordovician conodonts. The studied conodont specimens were obtained from three Middle Ordovician sections in south China and four Middle Ordovician sections in Sweden. LÄS MER