Sökning: "R package"

Visar resultat 1 - 5 av 44 avhandlingar innehållade orden R package.

  1. 1. Ultrafast Coherent X-ray Diffractive Nanoimaging

    Författare :Filipe R. N. C. Maia; Janos Hajdu; David van der Spoel; Keith Nugent; Uppsala universitet; []
    Nyckelord :XFEL; Phasing; Image Reconstruction; Single Particle Imaging; Ultrafast Diffraction; X-ray diffraction; Coherent Diffractive Imaging; CXDI;

    Sammanfattning : X-ray lasers are creating unprecedented research opportunities in physics,chemistry and biology. The peak brightness of these lasers exceeds presentsynchrotrons by 1010, the coherence degeneracy parameters exceedsynchrotrons by 109, and the time resolution is 105 times better. LÄS MER

  3. 2. Contributions to Kernel Equating

    Författare :Björn Andersson; Fan Yang-Wallentin; Marie Wiberg; Alina A. von Davier; Jorge González; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; observed-score test equating; item response theory; R; equipercentile equating; asymptotic standard errors; non-equivalent groups with anchor test design; Statistics; Statistik;

    Sammanfattning : The statistical practice of equating is needed when scores on different versions of the same standardized test are to be compared. This thesis constitutes four contributions to the observed-score equating framework kernel equating. LÄS MER

  4. 3. VAR Models, Cointegration and Mixed-Frequency Data

    Författare :Sebastian Ankargren; Johan Lyhagen; Yukai Yang; Gregor Kastner; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; vector error correction; small open economy; mixed-frequency data; Bayesian; steady state; nowcasting; state-space model; large VARs; simulation smoothing; factor stochastic volatility; R; Statistics; Statistik;

    Sammanfattning : This thesis consists of five papers that study two aspects of vector autoregressive (VAR) modeling: cointegration and mixed-frequency data.Paper I develops a method for estimating a cointegrated VAR model under restrictions implied by the economy under study being a small open economy. LÄS MER

  5. 4. Predicting mortality by comorbidity for patients with hip arthroplasty: Prospective observational register studies of a nationwide Swedish cohort : Prediktion av död baserat på samsjuklighet efter höftprotesoperation: Prospektiva registerstudier utifrån en nationell svensk kohort

    Författare :Erik Bülow; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; hip arthroplasty; orthopaedics; shared decision model; epidemiology; prediction model; mortality; comorbidity; R-package; orthopaedics; osteoarthritis; femoral neck fracture; restricted mean survival time;

    Sammanfattning : INTRODUCTION: Patients with total hip arthroplasty (THA) due to osteoarthritis (OA) are usually healthy, some with a remaining lifetime of several decades after surgery. Patients with hip arthroplasty due to a femoral neck fracture (FNF) are often old and frail with 13 % mortality within 90 days of surgery. LÄS MER

  7. 5. Change in the Pharmaceutical Industry : Aspects on Innovation, Entrepreneurship, Openness, and Decision Making

    Författare :Thomas Hedner; Magnus Klofsten; Johan Braet; Mirjam Knockaert; Linköpings universitet; []
    Nyckelord :Pharmaceutical industry; Big Pharma; life sciences; drug discovery; drug development; R D; business model; innovation; closed innovation; open innovation; entrepreneurship; intellectual property; multiple stakeholders; decision making; judgment; uncertainty; go no-go; go no-go recycle; company; SME.; Läkemedelsindustri; Big Pharma; biovetenskap; läkemedelsutveckling; utveckling av läkemedel; FoU; affärsmodell; innovation; stängd innovation; öppen innovation; entreprenörskap; immaterialrätt; beslutsfattande; osäkerhet; go no-go; go no-go recycle; företag; små och medelstora företag;

    Sammanfattning : Over the past century, the pharmaceutical industry has been a major contributor of individual and population health and societal wealth. Its products and services have contributed to longevity of large groups of patients and symptom relief from major diseases. LÄS MER