Sökning: "principal components analysis"

Visar resultat 21 - 25 av 93 avhandlingar innehållade orden principal components analysis.

  1. 21. Genusperspektiv på rehabilitering för patienter med rygg- och nackbesvär i primärvård

    Författare :Gunilla Stenberg; Christina Ahlgren; Anncristine Fjellman-Wiklund; Gunvor Gard; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Gender; neck pain; back pain; physiotherapy; rehabilitation; treatment; primary health care; confirmation; grounded theory; qualitative content analysis; questionnaire; principal component analysis; physical activity; sjukgymnastik; Physiotherapy;

    Sammanfattning : Introduction Gender as a social and cultural construction has an impact on physiotherapist and patient beliefs, understanding, and behaviour and could affect physiotherapy encounters. Gender studies in early rehabilitation are scarce. LÄS MER

  3. 22. A multivariate approach to QSAR

    Författare :Sven Hellberg; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; QSAR; beta-adrenergic agents; haloalkanes; halogenated anesthetics; peptides; fractional factorial design; multivariate data analysis; principal components PC ; partial least squares PLS ;

    Sammanfattning : Quantitative structure-activity relationships (OSAR) constitute empirical analogy models connecting chemical structure and biological activity. The analogy approach to QSAR assume that the factors important in the biological system also are contained in chemical model systems.The development of a QSAR can be divided into subproblems:1. LÄS MER

  4. 23. Adaptive analysis of functional MRI data

    Författare :Ola Friman; William M. Wells III; Linköpings universitet; []
    Nyckelord :MEDICINE; MEDICIN;

    Sammanfattning : Functional Magnetic Resonance Imaging (fMRI) is a recently developed neuroimaging technique with capacity to map neural activity with high spatial precision. To locate active brain areas, the method utilizes local blood oxygenation changes which are reflected as small intensity changes in a special type of MR images. LÄS MER

  5. 24. On physical units in multivariate analysis

    Författare :Tord Rikte; Matematisk statistik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : comparatively stringent mathematical frame has been developed, where the behaviour of physical dimensions (like ``length'', ``mass'', and ``time'') and physical units (like 1 m [1 metre], 1 kg [1 kilogramme], and 1 s [1 second]) is modelled. Easy-to-apply conditions for additivity and multiplicativity of physcial matrices are presented. LÄS MER

  7. 25. New tools for sample preparation and instrumental analysis of dioxins in environmental samples

    Författare :Lan Do; Peter Haglund; Staffan Lundstedt; Eric Reiner; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; PCDD Fs; dioxins; pressurized liquid extraction; PLE; selective SPLE; modular M-PLE; soil; sediment; sludge; gas chromatography; new stationary phases; multivariate data analysis; selectivity; interaction; Environmental Science; miljövetenskap;

    Sammanfattning : Polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs), two groups of structurally related chlorinated aromatic hydrocarbons, are of high concern due to their global distribution and extreme toxicity. Since they occur at very low levels, their analysis is complex, challenging and hence there is a need for efficient, reliable and rapid alternative analytical methods. LÄS MER