Sökning: "standard setting"

Visar resultat 21 - 25 av 305 avhandlingar innehållade orden standard setting.

  1. 21. Measurements of Neutron-induced Nuclear Reactions for More Precise Standard Cross Sections and Correlated Fission Properties

    Författare :Kaj Jansson; Cecilia Gustavsson; Stephan Pomp; Alexander Prokofiev; Ali Al-Adili; Fanny Farget; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Cross Section; Fission; Neutron-induced reactions; Simulation; VERDI; Fysik med inriktning mot tillämpad kärnfysik; Physics with specialization in Applied Nuclear Physics;

    Sammanfattning : It is difficult to underestimate the importance of neutron cross section standards in the nuclear data field. Accurate and precise standards are prerequisites for measuring neutron cross sections. Two different projects are presented here with the aim of improving on neutron standards. LÄS MER

  3. 22. Pulmonary tuberculosis and HIV interaction in a setting with a high prevalence of HIV : clinical, diagnostic and epidemiological aspects

    Författare :Judith Bruchfeld; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Tuberculosis; HIV; Ethiopia; Mycobacterium tuberculosis; diagnosis; direct microscopy; sodium hypochlorite; sputum concentration; epidemiology; DNA drug resistance; P. carinii; PCP.;

    Sammanfattning : The overall aim of this study was to elucidate the influence of HIV infection on the occurrence, clinical presentation, diagnostic yield and transmission of M tuberculosis among consecutive out-patients with symptoms suggestive of PTB in a high TB and HIV endemic area. Among 509 consecutive out-patients attending a university hospital in Ethiopia, 33. LÄS MER

  4. 23. Extensions of the kernel method of test score equating

    Författare :Gabriel Wallin; Marie Wiberg; Jenny Häggström; Anton A. Béguin; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Test equating; Nonequivalent groups; Standard error of equating; bandwidth selection; log-linear models; item response theory; Statistics; statistik;

    Sammanfattning : This thesis makes contributions within the area of test score equating and specifically kernel equating. The first paper of this thesis studies the estimation of the test score distributions needed in kernel equating. LÄS MER

  5. 24. Towards improved motorcycle helmet test methods for head impact protection : Using experimental and numerical methods

    Författare :Shiyang Meng; Svein Kleiven; Peter Halldin; Mazdak Ghajari; KTH; []
    Nyckelord :Head Injuries; Helmet; Injury Prevention; Motorcycle; Test Standard; Finite Element Method; Applied Medical Technology; Tillämpad medicinsk teknik;

    Sammanfattning : Head injury is the leading cause of death and major trauma for users of powered two-wheelers (PTWs). Helmet use can prevent and reduce head injuries when a crash is inevitable. However, today’s motorcycle helmets do not protect equally against all types of head injuries. LÄS MER

  7. 25. Dark Matter, Ancient Rocks, a Band of Higgs Bosons, and a Big Collider : or, Models of New Physics and Some Ways to Probe Them

    Författare :Sebastian Baum; Katherine Freese; Marco Cirelli; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; particle phenomenology; supersymmetry; dark matter; higgs boson; teoretisk fysik; Theoretical Physics;

    Sammanfattning : The past ~ 50 years have seen a remarkable success of particle physics. In the 1970s, the Standard Model was formulated and in 2012 its final ingredient, the Higgs boson, was discovered at the Large Hadron Collider (LHC). The Standard Model describes virtually all particle physics observable in the laboratory. LÄS MER