Sökning: "sample size"

Visar resultat 1 - 5 av 449 avhandlingar innehållade orden sample size.

  1. 1. On-chip Ultrasonic Sample Preparation

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Ida Sadat Iranmanesh; KTH.; [2015]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ultrasound; Sample preparation; Particle manipulation; Physics; Fysik; Biologisk fysik; Biological Physics;

    Sammanfattning : Acoustofluidics has become a well-established technology in the lab-on-a-chip scientific community. The technology involves primarily the manipulation of fluids and/or particles in microfluidic systems. LÄS MER

  2. 2. Comparative network analysis of human cancer: sparse graphical models with modular constraints and sample size correction

    Detta är en avhandling från Göteborg : Chalmers University of Technology

    Författare :José Sánchez; Göteborgs universitet.; Gothenburg University.; [2013]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Inverse covariance matrix; precision matrix; graphical models; high-dimension; low-sample; networks; sparsity; fused lasso; elastic net; cancer.;

    Sammanfattning : In the study of transcriptional data for different groups (e.g. cancer types) it's reasonable to assume that some dependencies between genes on a transcriptional or genetic variants level are common across groups. Also, that this property is preserved locally, thus defining a modular structure in the model networks. LÄS MER

  3. 3. Efficient strategies for collecting posture data using observation and direct measurement

    Detta är en avhandling från Umeå : Umeå universitet

    Författare :Per Liv; Högskolan i Gävle.; Högskolan i Gävle.; Umeå universitet.; [2012]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Occupational and Environmental Medicine; arbets- och miljömedicin; Exposure assessment; arm elevation; exposure variability; variance components; random effects model; precision; bias; sample size; sample allocation; calibration; bootstrapping;

    Sammanfattning : Relationships between occupational physical exposures and risks of contracting musculoskeletal disorders are still not well understood; exposure-response relationships are scarce in the musculoskeletal epidemiology literature, and many epidemiological studies, including intervention studies, fail to reach conclusive results. Insufficient exposure assessment has been pointed out as a possible explanation for this deficiency. LÄS MER

  4. 4. Microfluidic bases sample preparation for blood stream infections

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Sahar Ardabili; KTH.; [2014]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; sample-preparation; microfluidics; sepsis; size-based separation; selective cell-lysis; immune-based isolation; Biotechnology; Bioteknologi;

    Sammanfattning : Microfluidics promises to re-shape the current health-care system by transferring diagnostic tools from central laboratories to close vicinity of the patient (point-of-care). One of the most important operational steps in any diagnostic platform is sample preparation, which is the main subject in this thesis. LÄS MER

  5. 5. Intelligence and models for cognitive development

    Detta är en avhandling från Stockholm : Statistiska institutionen

    Författare :Linda Wänström; Stockholms universitet.; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; intelligence; cognitive development; sample size; multilevel models; latent growth curve models; SOCIAL SCIENCES Statistics; computer and systems science Statistics; SAMHÄLLSVETENSKAP Statistik; data- och systemvetenskap Statistik; statistik; Statistics;

    Sammanfattning : This dissertation focuses on cognitive development. In papers I and II, I study a special model, the second order latent growth curve model, that can be used to study cognitive development. Algebraic expressions for the variance of the estimation of slope differences are given. LÄS MER