Sökning: "Tomas Johansson"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden Tomas Johansson.

  1. 1. Creating and maintaining topologies in wireless networks

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Tomas Johansson; Luleå tekniska universitet.; [2006]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Dependable Communication and Computation Systems; Kommunikations- och beräkningssystem;

    Sammanfattning : Wireless ad-hoc networks differs in many aspects compared to traditional infrastructured networks. Among other things, individual nodes cannot be expected to know the topology of the entire network. LÄS MER

  2. 2. Habitat selection, nest predation and conservation biology in a Black-tailed Godwit (Limosa limosa) population

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Tomas Johansson; Uppsala universitet.; [2001]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Black-tailed godwit; Limosa limosa; nest site selection; nest predation; philopatry; risk analysis; Utvecklingsbiologi; NATURAL SCIENCES Biology Organism biology Developmental biology; NATURVETENSKAP Biologi Organismbiologi Utvecklingsbiologi; populationsbiologi; Population Biology;

    Sammanfattning : This thesis focuses on a black-tailed godwit (Limosa limosa) population, consisting of 35-40 pairs, that breeds on a grazed shore meadow on SE Gotland, Sweden. The small size of the population makes it more prone to extinction due to chance events, than a larger population.The godwits showed microhabitat preferences when choosing nest sites. LÄS MER

  3. 3. Escherichia coli transhydrogenase : an NMR and crystallisation study

    Detta är en avhandling från Chalmers University of Technology

    Författare :Tomas Johansson; Chalmers tekniska högskola.; Chalmers University of Technology.; [2002]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; transhydrogenase; paramagnetic NMR; protein-protein interactions; site-directed mutagenesis; srystallisation; membrane protein; structure function;

    Sammanfattning : .... LÄS MER

  4. 4. Reconstruction of a stationary flow from boundary data

    Detta är en avhandling från Linköping : Linköping University Electronic Press

    Författare :Tomas Johansson; Linköpings universitet.; Linköpings universitet.; [2000]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Cauchy problem; Generalized Stokes system; Ill-posed problems;

    Sammanfattning : We study a Cauchy problem arising in uid mechanics, involving the socalled stationary generalized Stokes system, where one should recover the ow from boundary measurements. The problem is ill-posed in the sense that the solution does not depend continuously on data.Two iterative procedures for solving this problem are proposed and investigated. LÄS MER

  5. 5. Reconstruction of flow and temperature from boundary data

    Detta är en avhandling från Linköping : Linköping University Electronic Press

    Författare :Tomas Johansson; Linköpings universitet.; Linköpings universitet.; [2003]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Partiella differentialekvationer; Operatorteori;

    Sammanfattning : In this thesis, we study Cauchy problems for elliptic and parabolic equations. These include the stationary Stokes system and the heat equation. Data are given on a part of the boundary of a bounded domain. The aim is to reconstruct the solution from these data. LÄS MER