Sökning: "Dynamic hierarchies"

Visar resultat 1 - 5 av 17 avhandlingar innehållade orden Dynamic hierarchies.

  1. 1. Static Visualizations for Dynamic Hierarchies

    Författare :Wiebke Köpp; Tino Weinkauf; Vijay Natarajan; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Dynamic hierarchies; Static visualization; Pixel-based visualization; Scalar data; Topology; Layout stability; Dynamiska hierarkier; Statisk visualisering; Pixelbaserad visualisering; Skalärdata; Topologi; Layout-stabilitet; Datalogi; Computer Science;

    Sammanfattning : Dynamic hierarchical data describes phenomena in a wide range of domains, from file management to demographics and business administration, as well as feature extraction results in spatial scientific data. As with all data, visualization is an integral step for gaining understanding about dynamic hierarchical data. LÄS MER

  3. 2. Efficient Partitioning of Dynamic Structured Grid Hierarchies

    Författare :Johan Steensland; Michael Thuné; Jarmo Rantakokko; Charles Norton; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; scientific computing; partitioning; structured grids; adaptive mesh refinement; dynamic load balancing; Beräkningsvetenskap; Scientific Computing;

    Sammanfattning : This thesis aims at decreasing execution time for large-scale structured adaptive mesh refinement (SAMR) applications executing on general parallel computers. The key contributions are (1) A conceptual dynamically adaptive meta-partitioner able to select and configure an appropriate partitioning technique, based on application and computer state, and (2) A characterization of new and existing domain-based partitioners, enabling a mapping from application and computer state onto appropriate partitioners, and (3) Sketched scalable solutions, expressed in terms of natural regions and expert algorithms, for the problem to efficiently partition large-scale SAMR applications with deep grid hierarchies executing on general parallel computers, and (4) A software partitioning tool Nature+Fable, implementing the greater parts of these sketched scalable solutions and engineered as part of the meta-partitioner. LÄS MER

  4. 3. The dissolution of channels and hierarchies : An inquiry into the changing customer relationships and organization of the computer corporations

    Författare :Annalisa Tunisini; Uppsala universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Business studies; Företagsekonomi; Business studies; Företagsekonomi; Business Studies; företagsekonomi;

    Sammanfattning : The study develops an analysis of the evolution that has occurred in the last decade incustomer relationships of the large computer manufacturing corporations and of the impactthat the changes in these relationships have had on the marketing management activity andorganization of these companies. The aim of our study is twofold - one empirical the othermore theoretical. LÄS MER

  5. 4. Autonomic Management of Partitioners for SAMR Grid Hierarchies

    Författare :Henrik Johansson; Jarmo Rantakokko; Michael Thuné; Johan Steensland; Manish Parashar; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Beräkningsvetenskap; Scientific Computing;

    Sammanfattning : Parallel structured adaptive mesh refinement methods decrease the execution time and memory usage of partial differential equation solvers by adaptively assigning computational resources to regions with large solution errors. These methods result in a dynamic grid hierarchy. LÄS MER

  7. 5. Chatt som umgängesform : Unga skapar nätgemenskap

    Författare :Jeanette Sjöberg; Karin Aronsson; Peg Lindstrand; Per-Anders Forstorp; Stockholms universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; chat room; social community; internet; alignments; exclusion; local hierarchies; participation; positionings; social interaction; language socialization; social order; young people; Child and Youth Science; barn- och ungdomsvetenskap;

    Sammanfattning : This dissertation focuses on social interaction patterns between young people in an online chat room, analyzing how social order is displayed and constituted. An overall issue concerns when and how the participants manage to co-create social communities within this setting. LÄS MER