Essays about: "spår"

Showing result 16 - 20 of 293 essays containing the word spår.

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

    University essay from Lunds universitet/Matematisk statistik

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

    Abstract : 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. READ MORE

  3. 17. Studying Elliptic Flow in High Centrality Pb-Pb Collisions using Proton Collision Background Fitting

    University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Partikel- och kärnfysik

    Author : Philip Fredholm; [2023]
    Keywords : Physics and Astronomy;

    Abstract : In this report, the elliptic flow in high centrality Pb-Pb collisions is calculated using two particle correlations $v_2\{2\}$ but without any imposed separation in η with data taken from the ALICE experiment at CERN in 2015. Instead, measurements of the same correlations in proton-proton collisions is used as a background to account for non-flow effects and data is correlated between the time projection chamber and the forward multiplicity detectors in order to avoid intra-jet correlations. READ MORE

  4. 18. Collecting Cyber Traces : Adding Forensic Evidence In Threat Models

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Dingli Mao; [2023]
    Keywords : Threat Modeling; Security and Risk Analysis; Forensic Evidence; Domain Specific Language; hotmodellering; Säkerhet och riskanalys; Kriminaltekniska bevis; Domänspecifikt språk;

    Abstract : There is a rising concern about cyber security as both industry and individuals depend increasingly on the Internet. Threat modeling and attack simulations are the main approaches for the security analyst to examine the universal reliability of Information Technology infrastructures. READ MORE

  5. 19. Bangårdsparken i Karlsborg : ett gestaltningsförslag för det gamla bangårdsområdet i centrala Karlsborg med utgångspunkt i platsens historia

    University essay from SLU/Dept. of Urban and Rural Development

    Author : Alice Aaro; [2023]
    Keywords : Karlsborg; bangårdsområde; järnväg; transformation; park; parkstråk;

    Abstract : Landskap, både urbana och rurala, är i konstant förändring och under påverkan av både naturliga och kulturella krafter. Som ett resultat av detta är arbetet med att gestalta en plats aldrig fristående utan alltid en del av en tidslinje, både bakåt och framåt. READ MORE

  6. 20. Respiratory Motion Correction in PET Imaging: Comparative Analysis of External Device and Data-driven Gating Approaches

    University essay from KTH/Fysik

    Author : Nina Lindström Söraas; [2023]
    Keywords : PET CT; Tomographic reconstruction; Respiratory gating techniques; Image registration; Motion correction; PET CT; Tomografisk rekonstruktion; Gating tekniker; Bildregistrering; Rörelsekorrigering;

    Abstract : Positron Emission Tomography (PET) is pivotal in medical imaging but is prone to artifactsfrom physiological movements, notably respiration. These motion artifacts both degradeimage quality and compromise precise attenuation correction. READ MORE