Sökning: "Diagnostic errors"

Visar resultat 16 - 20 av 43 avhandlingar innehållade orden Diagnostic errors.

  1. 16. On model based aero engine diagnostics

    Författare :Mikael Stenfelt; Konstantinos Kyprianidis; Asteris Apostolidis; Mälardalens universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Aero engines; model based diagnostics; gas path analysis; Energy- and Environmental Engineering; energi- och miljöteknik;

    Sammanfattning : Maintenance and diagnostics play a vital role in the aviation sector. This is especially true for the engines, being one of the most vital components. Lack of maintenance, or poor knowledge of the current health status of the engines, may lead to unforeseen disruptions and possibly catastrophic effects. LÄS MER

  3. 17. Moment Estimation Using Extreme Value Methods

    Författare :Joachim Johansson; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Pareto distribution; mean estimation; heavy tailed distributions; telecommunication; m -dependence; superpopulation sampling; peaks over threshold; telecommunication;

    Sammanfattning : The thesis is composed of three papers, all dealing with the application of extreme value methods to the problem of moment estimation for heavy-tailed distributions. In Paper A, an asymptotically normally distributed estimate for the expected value of a positive random variable with infinite variance is introduced. LÄS MER

  4. 18. Some aspects of statistical inference in systems of equations

    Författare :Ghazi Shukur; Statistiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Statistics; small sample properties.; misspecification; system of equations; dynamic specification; operations research; programming; actuarial mathematics; Statistik; operationsanalys; programmering; aktuariematematik;

    Sammanfattning : The objective of this thesis is to develop a strategy for statistical/econometric inferences applicable to systemwise testing of econometric models. A common deficiency in many applied econometric studies is the absence of statistical diagnostic testing. LÄS MER

  5. 19. Appendicitis : Epidemiology and diagnosis

    Författare :Roland Andersson; Lars Holmberg; Linköpings universitet; []
    Nyckelord :appendicitis; epidemiology; etiology; diagnosis; natural history; appendectomy; MEDICINE; MEDICIN;

    Sammanfattning : The study concerns appendicitis, its epidemiology and diagnosis, and the outcome of appendectomy. A population based cohort of 9,274 patients undergoing appendectomy in 1969 to 1990 in Jönköping County was retrospectively studied, and 502 patients admitted for suspected appendicitis to the hospitals in Jönköping and Eksjö between October 1992 and December 1993 were prospectively studied. LÄS MER

  7. 20. Separation of Water and Fat Signal in Magnetic Resonance Imaging : Advances in Methods Based on Chemical Shift

    Författare :Johan Berglund; Joel Kullberg; Lars Johansson; Håkan Ahlström; Zhi-Pei Liang; Uppsala universitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Magnetic resonance imaging; digital image reconstruction; chemical shift imaging; water and fat separation; Dixon method; fat suppression; quantitative MRI; whole-body MRI; fatty acid composition; fat unsaturation; triglycerides; adipose tissue; liver fat; T2* mapping; Radiology; Radiologi; Radiology; Radiologi;

    Sammanfattning : Magnetic resonance imaging (MRI) is one of the most important diagnostic tools of modern healthcare. The signal in medical MRI predominantly originates from water and fat molecules. LÄS MER