Sökning: "Bursts"

Visar resultat 1 - 5 av 91 avhandlingar innehållade ordet Bursts.

  1. 1. Photospheric emission in gamma ray bursts : Analysis and interpretation of observations made by the Fermi gamma ray space telescope

    Författare :Shabnam Iyyani; Felix Ryde; David Burrows; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; gamma ray bursts; photosphere; radiation mechanism; Theoretical Physics; teoretisk fysik;

    Sammanfattning : The large flashes of radiation that are observed in GRBs are generally believed to arise in a relativistic jetted outflow. This thesis addresses the question of how and where in the jet this radiation is produced. LÄS MER

  3. 2. Multi-messenger emission from gamma-ray bursts

    Författare :Filip Samuelsson; Felix Ryde; Peter Mészáros; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; astrophysics; gamma-ray bursts; cosmic rays; Atomic; Subatomic and Astrophysics; Atomär fysik; subatomär fysik och astrofysik;

    Sammanfattning : Multi-messenger astronomy is a very hot topic in the astrophysical community. A messenger is something that carries information. Different astrophysical messenger types are photons, cosmic rays, neutrinos, and gravitational waves. They all carry unique and complementary information to one another. LÄS MER

  4. 3. Two Languages, Two Scripts : Bilingual and Biscriptal Children with and without Reading Difficulties Read and Write in Persian (L1) and Swedish (L2)

    Författare :Baran Johansson; Eva Lindgren; Maria Levlin; Sven Strömqvist; Umeå universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Reading; Writing; Eye and Pen; Handwriting; Persian; Swedish; Bilinguals; Biscriptals; Writing fluency; Meaning making; Pauses; Bursts; Linguistic skills; Cognitive Skills; Bilingual writers; Reading difficulties; Skrivande; Läsning; Tvåspråkiga barn; Tvåspråkighet; Flerspråkighet; Lässvårigheter; Läsflyt; Avkodning; Pauser; Bursts; Eye and Pen; Loggning; Två skriftsystem; Persiska; Svenska; Handskrift; Meningsskapande; Lingvistiska färdigheter; Kognitiva färdigheter; Linguistics; lingvistik;

    Sammanfattning : The main aim of this dissertation was to explore L1 (Persian) and L2 (Swedish) reading and writing of 26 bilingual biscriptal children with and without reading difficulties (RD) (years 4–9). Previous studies have mainly focused on Latin scripts or one alphabetic and one non-alphabetic script with English as L1 or L2. LÄS MER

  5. 4. Failure Monitoring and Asset Condition Assessment in Water Supply Systems

    Författare :Dalius Misiunas; Industriell elektroteknik och automation; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mechanical engineering; reglerteknik; robotteknik; Automatiska system; Water supply; failure; detection; monitoring; location; bursts; hydraulics; leakage; asset management; condition assessment; pipelines; pipe networks; Automation; control engineering; robotics; vacuum technology; vibration and acoustic engineering; Maskinteknik; hydraulik; vakuumteknik; vibrationer; akustik;

    Sammanfattning : In this thesis, different aspects of failure management in urban water supply systems are discussed. As assets are getting older, the number of pipe failures is increasing and an efficient failure management strategy becomes important. LÄS MER

  7. 5. Statistical Investigations ofthe Emission Processes in Gamma-ray Bursts

    Författare :Zeynep Acuner; Felix Ryde; Judith Racusin; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; gamma-ray bursts; Atomic; Subatomic and Astrophysics; Atomär fysik; subatomär fysik och astrofysik;

    Sammanfattning : Physical emission mechanisms responsible for gamma-ray bursts (GRBs) remain elusive to this day, 50 years after their discovery. Although there are well studied physical models, their power to explain the observed data is a matter of debate. LÄS MER