Sökning: "dispersion modelling"

Visar resultat 1 - 5 av 27 uppsatser innehållade orden dispersion modelling.

  1. 1. 3D geospatial data requirements for simulating noise using the Nord2000 model: Case study of the impact of building façade types and roof configurations on simulated traffic noise levels

    Master-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Författare :Soraya Hosseinvash Azari; [2023]
    Nyckelord :Physical Geography; Ecosystem Analysis; noise simulation; traffic; Nord2000 model; building façade types; roof configurations; geospatial data; 3CIM; SoundPLAN; acoustic properties; urban areas; 3D city model; Earth and Environmental Sciences;

    Sammanfattning : The European Union implements the Environmental Noise Directive (END), which offers a framework for evaluating and assessing environmental noise. All EU members are required to create strategic noise maps to inform the public about noise pollution and its effects. LÄS MER

  3. 2. Implementing spatial variance in the rate of photolytic breakdown of NO2 in urban street canyons

    Master-uppsats, Lunds universitet/Institutionen för energivetenskaper

    Författare :Fabian Friberg; [2022]
    Nyckelord :cfd; computational fluid dynamics; NOx; street canyon; NO2; NO; O3; photolysis; OpenFOAM; Physics and Astronomy;

    Sammanfattning : In this study a module for calculating the solar exposure of individual fluid cells was developed to more accurately represent the effect of photolysis on the pollutant dispersion in an urban street canyon. The module was tested and validated on 12 different cases, each with a different geographical location, time of year and/or time of day. LÄS MER

  4. 3. Quantification of cerebral blood flow with 15O-water PET : A comparison study between PET/CT and PET/MR and two different blood sampling instruments

    Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för fysik; Umeå universitet/Diagnostisk radiologi

    Författare :Amanda Eriksson; [2021]
    Nyckelord :Cerebral Blood Flow; CBF; oxygen-15-labelled water; PET CT; PET MR; Quantification of CBF; Image Derived Input Function; IDIF; Blood Sampled Input Function; BSIF; Arterial Input Function; AIF; Tracer Kinetic Modelling; Single Tissue Compartmental Model; 1TCM;

    Sammanfattning : Cerebral blood flow quantification is a vital diagnostic tool for disease monitoring and used for diagnosing a variation of pathological conditions. The human brain requires roughly about 20 % of the total cardiac output to sustain normal functioning, hence the perfusion of blood is an important factor to deliver oxygenated blood. LÄS MER

  5. 4. Illiquidity and Its Threats - A Study of the U.S. Corporate Bond Market

    Master-uppsats, Lunds universitet/Matematisk statistik

    Författare :Adam Löfquist; Erik Ottosson; [2021]
    Nyckelord :Liquidity; price dispersion; Hui-Heubel liquidity ratio; ILLIQ; TRACE; U.S. corporate bonds; Over-the-Counter market; regression analysis; return modelling; stressed market conditions.; Mathematics and Statistics;

    Sammanfattning : In recent times of market turmoil, liquidity risk has become a big talking point. As certain Swedish fixed income funds, which were advertised as safe investment options, closed for a few trading days in March of 2020 due to the extremely high stress on the market, questions about how illiquidity a↵ects risk and return were asked. LÄS MER

  7. 5. Modelling of water and material transport in River Storån to Lake Bolmen

    Master-uppsats, Lunds universitet/Avdelningen för Teknisk vattenresurslära

    Författare :Imjal Sukupayo; [2021]
    Nyckelord :Brownification; Water Color; Dissolved Organic Matter; Discharge; hydraulic analysis; Tracer Analysis; Dispersion coefficient; Advection and Diffusion; Bolmen Lake; Storån River; Technology and Engineering; Earth and Environmental Sciences;

    Sammanfattning : The change of color of water from yellow to brown termed as brownification process is mainly due to leaching of humus and iron concentrations. In recent years, this problem is increasing in lake Bolmen, a major source of drinking water in Skåne county, Sweden. LÄS MER