Sökning: "Nicklas Pettersson"

Hittade 4 avhandlingar innehållade orden Nicklas Pettersson.

  1. 1. Multiple Kernel Imputation : A Locally Balanced Real Donor Method

    Författare :Nicklas Pettersson; Daniel Thorburn; Susanne Rässler; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bayesian Bootstrap; Boundary Effects; External Information; Kernel estimation features; Local Balancing; Pólya Sampling; statistik; Statistics;

    Sammanfattning : We present an algorithm for imputation of incomplete datasets based on Bayesian exchangeability through Pólya sampling. Each (donee) unit with a missing value is imputed multiple times by observed (real) values on units from a donor pool. The donor pools are constructed using auxiliary variables. LÄS MER

  3. 2. Topsar och cellmembran : Kroppens näringsupptag i undervisning och elevtexter på mellanstadiet

    Författare :Alma Jahic Pettersson; Carl-Johan A. Rundgren; Lena Tibell; Ragnhild Löfgren; Nicklas Gericke; Linköpings universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Social semiotic; Metaphors; Everyday expressions; Systemic functional grammar; Organizational levels; Biology; Chemistry; Multimodality; Socialsemiotik; Metaforer; Vardagsuttryck; Systemisk funktionell grammatik; Organisationsnivåer; Biologi; Kemi; Multimodalitet;

    Sammanfattning : I avhandlingen studeras mellanstadieelevers meningsskapande kring näringsupptag. Avhandlingens artiklar baseras på två datainsamlingar. I den första studeras skriftliga svar på ett nationellt prov i biologi. I den andra studeras klassrumsundervisning i två skolor med en animation om näringsupptag som kontext. LÄS MER

  4. 3. Tailoring the Optical Response of III-V Nanowire Arrays

    Författare :Mahtab Aghaeipour; Håkan Pettersson; Mats-Erik Pistol; Nicklas Anttu; Lars Samuelson; Constance J. Chang-Hasnain; NanoLund: Centre for Nanoscience; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; III-V nanowires; absorption; optical modes; photovoltaics; III-V nanowires; absorption; optical modes; photovoltaics; Fysicumarkivet A:2017:Aghaeipour;

    Sammanfattning : Semiconductor nanowires show a great deal of promise for applications in a wide range of important fields, including photovoltaics, biomedicine, and information technology. Developing these exciting applications is strongly dependent on understanding the fundamental properties of nanowires, such as their optical resonances and absorption spectra. LÄS MER

  5. 4. Cut-off and coordinated survey sampling

    Författare :Kira Coder Gylling; Thomas Laitila; Nicklas Pettersson; Martin Axelson; Örebro universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Statistik; Statistics;

    Sammanfattning : The problem of estimation from a sample is well known and its solutions are the foundation for the sample surveys conducted at e.g. national statistical institutes. This dissertation looks at the estimation problem from the perspective of business survey methodology. LÄS MER