Sökning: "delphi method"

Visar resultat 1 - 5 av 24 avhandlingar innehållade orden delphi method.

  1. 1. Single-Photon Events in the DELPHI Experiment

    Författare :Elisabeth Falk; Partikelfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; kvantfältteori; Elementarpartikelfysik; quantum field theory; DELPHI; STIC; LEP; single-photon events; PS; off-energy electrons; silicon-strip detector; coherent noise; emittance; Elementary particle physics; fast wire scanner; High energy interactions; cosmic rays; Kosmisk strålning; högenergi; Fysicumarkivet A:1998:Falk Harris;

    Sammanfattning : A series of studies pertaining to the STIC calorimeter at the DELPHI experiment at LEP is presented, and a new generation of fast wire scanners for emittance measurements at PS is described. The STIC studies are centered around a single-photon analysis, in which the reaction e+ e- -> gamma + invisible particles was studied at center-of-mass energies of 161, 172 and 183 GeV. LÄS MER

  2. 2. Different Methods for Quark/Gluon Jet Classification on Real Data from the DELPHI detector

    Författare :Göran Tranströmer; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; quantum field theory; QCD; LEP; kvantfältteori; JETSET; quark jets; threejet events; gluon jets; lifetime tag; jet classification; Fodor moments; Fisher discriminant method; Elementarpartikelfysik; Elementary particle physics; DELPHI; Fysicumarkivet A:1999:Tranströmer;

    Sammanfattning : Different methods to separate quark jets from gluon jets have been investigated and tested on data from the DELPHI experiment. A test sample of gluon jets was selected from $bar{b}g$ threejet events where the two b-jets had been identified using a lifetime tag and a quark jet sample was obtained from $qar{q}gamma$ events where the photon was required to have a high energy and to be well separated from the two jets. LÄS MER

  3. 3. Charged kaon and proton production in B-hadron decays

    Författare :Fredrik Tegenfeldt; Uppsala universitet; []
    Nyckelord :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Radiation sciences; Högenergifysik; LEP; DELPHI; B-hadron; proton; kaon; Strålningsvetenskap; Radiation biology; Strålningsbiologi; High Energy Physics; Högenergifysik;

    Sammanfattning : The production of charged kaons and protons in B-hadron decays has been measured in e+e- annihilations at centre-of-mass energies corresponding to the Z0 mass. In total 1.6 million hadronic Z0 decays were analysed, corresponding to about 690000 B-hadron decays. LÄS MER

  4. 4. Studies of Heavy Baryons in DELPHI and Radiation Monitoring in DØ

    Författare :Lisa Berntzon; Barbro Åsman; Torbjörn Moa; Hans-Åke Gustafsson; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; high energy physics; baryons; Physics; Fysik;

    Sammanfattning : Between the years 1992 and 1995 about 3.5 million hadronic Z decays were collected by the DELPHI detector at CERN. This data has been used to measure the production and lifetime of the beauty strange baryon Ξb,in the inclusive decay channel Ξb →Ξ-ℓ- X. LÄS MER

  5. 5. Caring in research and practice - some nursing aspects

    Författare :Siv Bäck-Pettersson; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Nyckelord :caring in research; caring in practice; patients? perspectives; nurses? perspectives; descriptive exploratory method; descriptive phenomenological method; content analysis; Delphi technique.;

    Sammanfattning : Caring in research and practice - some nursing aspects Siv Bäck-Pettersson Institute of Medicine, Department of Public Health and Community Medicine/Primary Health Care, The Sahlgrenska Academy at Göteborg University, Göteborg, Sweden. Abstract This thesis has a caring science perspective (caring in nursing). LÄS MER