Search for dissertations about: "Missing values"

Showing result 21 - 25 of 78 swedish dissertations containing the words Missing values.

  2. 21. Using multiple performance parameters in testing small graphical symbols

    Author : Dominic Paul T. Piamonte; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk psykologi; Engineering Psychology;

    Abstract : The main objective of the study was to analyse the understanding of small graphical symbols (pictograms and icons) among different potential user groups around the world using different test indices or parameters. Pilot studies using videophone symbols designed in Japan, USA and England were initially done. READ MORE

  4. 22. Influences of Statistical Analyses on Result Presentations of Oral Implant Treatment

    Author : Irene Herrmann; Göteborgs universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Statistical methods; oral implants; dependence; prognostic risk factors; multivariate analysis; bone-combination; Jackknife; log rank test; variance;

    Abstract : Abstract Evaluation of oral implants involves at least three major components: statistical methods, study design and success criteria. The aims of the current thesis were to investigate how different statistical methods affect the outcome of oral implant treatment and to statistically determine if any dependence among implants placed in the same jaw exists. READ MORE

  5. 23. Phytoplankton in Swedish oligotrophic lakes, affected by acidification, metals and liming

    Author : Einar Hörnström; Eva Willén; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ecological Botany; ekologisk botanik;

    Abstract : Anthropogenic airborne acidification has seriously affected thousands of lakes in Sweden, an alarming fact which was first noticed in the early 1970s, when pH had decreased to values below 5, especially in areas poor in limestone such as the Swedish west coast. This development was critical to phytoplankton, the diversity of which being markedly reduced, and where the groups Cyanophyceae, Bacillariophyceae and Conjugatophyceae were totally eliminated. READ MORE

  6. 24. Adaptive tensor-based morphological filtering and analysis of 3D profile data

    Author : Anders Landström; Cris Luengo; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signalbehandling; Signal Processing;

    Abstract : Image analysis methods for processing 3D profile data have been investigated and developed. These methods include; Image reconstruction by prioritized incremental normalized convolution, morphology-based crack detection for steel slabs, and adaptive morphology based on the local structure tensor. READ MORE

  7. 25. Associations between oral biofilm, periodontal disease, and systemic health : with a focus on atherosclerosis and breast cancer

    Author : Maha Yakob; Karolinska Institutet; Karolinska Institutet; []
    Keywords : periodontal disease;

    Abstract : The general hypothesis of this series of studies was that oral infections, particularly periodontal disease, by triggering inflammatory reactions detrimentally affect systemic health where inflammations are known to play a role in the pathogenesis, namely cardiovascular disease and cancer. Consequently, the general aim was to study the association between oral biofilm and certain oral micro-organisms, periodontal disease, and selected inflammatory markers with a focus on atherosclerosis and breast cancer (BC). READ MORE