Sökning: "Gravity Model"

Visar resultat 16 - 20 av 392 uppsatser innehållade orden Gravity Model.

  1. 16. The Impact of Swampland Conjectures

    Master-uppsats, Uppsala universitet/Teoretisk fysik

    Författare :Daniel Nilsson; [2023]
    Nyckelord :String theory; Quantum gravity; Swampland program; Effective field theories;

    Sammanfattning : The Swampland program is way of sorting effective field theories based on conjectures of how an effective field theory consistent with quantum gravity should look like. In this thesis we take a closer look at the No Global Symmetries Conjecture, the Weak Gravity Conjecture, the de Sitter Conjecture and the Trans-Planckian Censorship Conjecture. LÄS MER

  3. 17. Beyond Distance: Understanding the Trade Disadvantage of the Sub-Saharan African Landlocked Countries

    Kandidat-uppsats, Lunds universitet/Nationalekonomiska institutionen

    Författare :Mai Ahrne Bojang; [2023]
    Nyckelord :Landlocked; Gravity model; Sub-Saharan Africa; European Union; International trade; Business and Economics;

    Sammanfattning : This paper analyses the magnitude of exports of the landlocked countries of Sub-Saharan Africa to the European Union and attempts to find an explanation for the low trade flows of the region. Understanding the cause of the limited trade of landlocked countries in the region is important to enable successful implementation of trade enhancing policies and reforms. LÄS MER

  4. 18. Evaluation of structurally controlled rockfall hazard for underground excavations in seismically active areas of the Kiirunavaara mine

    Master-uppsats, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Författare :Manuel Alberto Fuentes Espinoza; [2023]
    Nyckelord :Structurally controlled rockfalls; rockfalls due to seismic shaking; sublevel caving; fork layout; Unwedge; wedge analysis; deterministic analysis; probabilistic analysis;

    Sammanfattning : Sublevel caving operations at great depths are subjected both to large stress concentrations that are redistributed as the mining front progresses and to mining-induced seismicity. This is the case for Kiirunavaara mine, Sweden’s largest underground mine. LÄS MER

  5. 19. Petrophysical Properties of Rocks in Central Kiruna Mining District, Sweden

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Simon Peter Dagbui; [2023]
    Nyckelord :Kiruna mining district; Common earth model; petrophysics; density; AMS; complex electrical resistivity; NRM; magnetization; IOA; Kirunavaara Mineralization;

    Sammanfattning : High economic and metallogenic significance of northern Norrbotten ore district in Sweden which hosts Kiruna mining district makes it a very important ore district in the world. Northern Norrbotten ore district contributes a combined 90 percent of iron production in Europe. LÄS MER

  7. 20. Hur påverkades Ukrainas bilaterala exportflöden av kriget i Ukraina? En undersökning med gravitationsmodellen för handel

    Kandidat-uppsats, Lunds universitet/Nationalekonomiska institutionen

    Författare :Teo Risberg; [2023]
    Nyckelord :Export; war; Ukraine; risk; gravity model; Business and Economics;

    Sammanfattning : This Bachelor’s thesis consists of an empirical study using a gravity regression model to determine if Ukrainian bilateral export flows were affected by the 2014 war through an increase in political and social risk functioning as trade resistance. There is an empirical research gap on this issue that this thesis attempts to mitigate. LÄS MER