Sökning: "spatial dependence"

Visar resultat 1 - 5 av 50 uppsatser innehållade orden spatial dependence.

  1. 1. Regional Inequality and Spatial Dependence in Sweden

    Magister-uppsats, Lunds universitet/Nationalekonomiska institutionen

    Författare :Samuel Malmström Arfwedson; [2023]
    Nyckelord :Regional inequality; convergence; spatial dependence; spatial econometrics; Sweden; Business and Economics;

    Sammanfattning : Regional inequality is a growing concern in developed countries, as country-level convergence may obscure increasing disparities within countries. This thesis aims to address this concern by examining the dynamics of regional convergence in Sweden from 1980-2022. LÄS MER

  3. 2. Spectral broadening of 4 mJ femtosecond pulses using a bulk multi-pass cell

    Master-uppsats, Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Författare :Saga Westerberg; [2023]
    Nyckelord :Lasers; Ultrashort; Nonlinear Optics; femtosecond; Multi-Pass Cell; Spectral broadening; pulse post-compression; Self phase modulation; Physics and Astronomy;

    Sammanfattning : Nonlinear optical effects can be used for spectral broadening, which the basis of the field of post-compression of laser pulses. When the intensity of light becomes high enough the refractive index becomes intensity dependent, and as the intensity often varies both with position and time so does the refractive index. LÄS MER

  4. 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

  5. 4. CHARACTERIZATION AND EVALUATION OF A NIPAM POLYMER GEL MRI DOSIMETER SYSTEM

    Master-uppsats,

    Författare :Christian Waldenberg; [2022-11-08]
    Nyckelord :Medical physics; Normoxic polymer gel dosimeter; NiPAM;

    Sammanfattning : Purpose: The normoxic polymer gel dosimeter based on N-isopropyl acrylamide (NiPAM) is a promising full 3D-dosimeter with high spatial resolution and near tissue equivalency. However, limited work have been done in vestigating this dosimeter. The dose response and reproducibility of a NiPAM dosimeter was investigated. LÄS MER

  7. 5. MULTI-CRITERIA ANALYSIS FOR RENEWABLE ENERGY INFRASTRUCTURE PLANNING : A case study of Nigeria

    Magister-uppsats, Umeå universitet/Institutionen för geografi

    Författare :Nelson Okosun; [2022]
    Nyckelord :Energy; Multi-Criteria; Infrastructure; GIS;

    Sammanfattning : Rising levels of urbanization and technological advancements has led to a shift towards dependence on energy consuming devices, machineries, and electrical appliances both for personal and productive use. This has led to higher demand for electricity services and more pressure on power supply facilities. LÄS MER