Sökning: "hidden fire"

Visar resultat 1 - 5 av 11 uppsatser innehållade orden hidden fire.

  1. 1. Measuring copper abundances in the Galactic Bulge

    Kandidat-uppsats, Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionen

    Författare :Nikolei Höglinger; [2024]
    Nyckelord :Copper; Galaxy: abundances; Galaxy: bulge; Chemical Evolution; Physics and Astronomy;

    Sammanfattning : Context: The chemical evolution of Cu in the Galactic bulge have been studied in a few studies using red giant branch stars, but the ages of individual red giant stars are difficult to determine. In addition, the bulge has been a challenging region of the Milky Way galaxy to obtain high-resolution spectra of stars, except when observing through certain few small fields into the bulge that are known to have low extinction. LÄS MER

  2. 2. Släcksystem för ubåtar - vattendimma

    Kandidat-uppsats, Lunds universitet/Avdelningen för Brandteknik

    Författare :Axel Nordström; Simon Thorvaldsson; [2023]
    Nyckelord :Ubåt; vattendimma; krav och regelverk; brandsäkerhet; brandskyddssystem; Submarine; water mist; rules and regulations; fire safety; fire suppression system; Technology and Engineering;

    Sammanfattning : This report is written on the behalf of SAAB Kockums AB to investigate the feasibility of using water mist fire protection systems on board conventional submarines as an alternative to the traditional solution using Halon 1301. Halon 1301 has since the late eighties been phased out due to environmental concerns. LÄS MER

  3. 3. Reconstruction of Fire Spread with a Markov Random Field Mixture Model

    Master-uppsats, Lunds universitet/Matematisk statistik

    Författare :Marcus Gehrmann; [2023]
    Nyckelord :Forest fire; fire scars; spatial statistics; Markov random field; EM-algorithm; pseudo-likelihood; Mathematics and Statistics;

    Sammanfattning : This thesis revolves around reconstructing fire sizes for historical fires in Jämtgaveln, Sweden based on data of fire scars in trees. We propose a Hidden Markov Model (HMM), where the domain is divided into quadratic grid cells of 250 $\times$ 250 m and with these grid cells we associate a binary Markov random field taking values 0 or 1 corresponding to no fire and fire respectively. LÄS MER

  4. 4. The Susceptibility of the Circumpolar North to Zombie Wildfire : An Exploratory Case Study of Sweden

    Master-uppsats, Södertörns högskola/Miljövetenskap

    Författare :Stephanie Louise Hurst; [2021]
    Nyckelord :Wildfire; zombie fire; overwintering; holdover; carbon cycle; climate change; Circumpolar North; Sweden; Skogsbrand; zombiebrand; övervintrande; kolcykel; klimatförändring; Cirkumpolär Norr; Sverige;

    Sammanfattning : Climate change is warming the North and exposing its immense carbon stores not only to wildfire disturbances, but overwintering, or zombie, fire. These remnants of summer fires can spend months smouldering under the surface, hidden under the protection of layers of snow, burning through immense amounts of carbon, which is then released into the atmosphere, further exacerbating climate change. LÄS MER

  5. 5. Jämförelse mellan korslimmat träbjälklag och armerad betongbjälklag i flervåningshus

    M1-uppsats, Högskolan i Gävle/Energisystem och byggnadsteknik

    Författare :Martin Edås; Kevin Magnenat; [2020]
    Nyckelord :KL-träbjälklag; betongbjälklag; nedböjning; brand; ljud; vikt; reaktionskrafter;

    Sammanfattning : Armerad betong är ett av de vanligaste stommaterialen inom byggnadsindustrin med bra brandmotstånd tillsammans med bra styvhets- och ljudisolerande egenskaper. Det negativa med armerad betong är dess miljöpåverkan. LÄS MER