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Visar resultat 1 - 5 av 59 uppsatser som matchar ovanstående sökkriterier.

  1. 1. Data streaming provenance in advanced metering infrastructures

    Master-uppsats, Göteborgs universitet/Institutionen för data- och informationsteknik

    Författare :Zozk Mohamed; [2023-11-24]
    Nyckelord :Advanced Metering Infrastructure; Ananke; Apache Flink; Göteborg Energi; Provenance; Stream processing; Stream Processing Engine;

    Sammanfattning : Increasing volumes of data in digital systems have made the traditional approach of gathering and storing all the data while analyzing it in bulks at periodic intervals challenging and costly. One such field is the electric grid market, which has started modernizing its aging grids into smart grids where Advanced Metering Infrastructures (AMIs) play a vital role. LÄS MER

  3. 2. Analyzing Synthetic Spider Silk-based Diffraction Grids for the Sunshade Project

    Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Johanna D'Ciofalo Khodaverdian; Amira Karlsson; [2023]
    Nyckelord :Sunshade project; Diffraction grating; Artificial spider silk; Climate change; Geoengineering;

    Sammanfattning : To mitigate climate change a proposed space-based geoengineering solutionis to screen off solar irradiance by placing a membrane in between the Earthand the Sun. The feasibility of such a project largely depends on minimizingthe mass of the shading screen and as an extension to the Sunshade projectthis thesis investigated how such a low-mass membrane could be designed. LÄS MER

  4. 3. Investigation of coarse-grid CFD approach for nuclear engineering application

    Master-uppsats, KTH/Fysik

    Författare :Michela Casarella; [2023]
    Nyckelord :Thermal-hydraulics; Nuclear reactor; CFD; Sub-channel; Coarse-grid; Turbulence; Pressure drop; Termisk-hydraulik; kärnreaktor; CFD; underkanal; grovkornigt nät; turbulens; tryckfall;

    Sammanfattning : In this thesis, an innovative coarse grid CFD approach is developed that aims toexploit the capabilities of sub-channel codes and CFD methods while overcoming theirlimitations. In the approach, a very coarse mesh is implemented in the CFD softwareOpenFOAM and a new wall treatment, based on the traditional concept of the wallfunction, is applied to the wall boundary conditions of the domain to take into accountthe low resolution of the grid which does not allow to effectively capture the effect of thesolid walls on the thermo-hydraulics of the flow. LÄS MER

  5. 4. Leveranssäkerhet på ett radiellt elnät : Påverkan av utlokaliserade brytare, nedkabling och breddning avledningsgata

    Uppsats för yrkesexamina på grundnivå, Umeå universitet/Institutionen för tillämpad fysik och elektronik

    Författare :Samuel Sandström Edlund; [2023]
    Nyckelord :Leverenssäkerhet; radiellt elnät; utlokaliserade brytare; nedkabling; ledningsgata;

    Sammanfattning : Detta examensarbete undersöker hur leveranssäkerheten i ett radiellt mellanspänningsnät kan påverkas av olika förbättringsåtgärder. Dessa åtgärder är nedkabling av friledning, breddning av ledningsgata samt placering av utlokaliserade brytare vid en förgrening. LÄS MER

  7. 5. Electron-skyrmion systems, in and out of equilibrium, and isolated or contacted to reservoirs

    Magister-uppsats, Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen

    Författare :Emil Adam Jonatan Östberg; [2023]
    Nyckelord :skyrmion; skyrmions; NEGF; freen s function; quantum transport; non-equlibrium; topology; topological charge; skyrmionics; current induced; open system; Physics and Astronomy;

    Sammanfattning : A Kondo lattice skyrmion model in contact with a macroscopic environment is simulated to explore skyrmion dynamics, which is an extension of previous work. The system is simulated using non-equilibrium Green's functions within the generalized Kadanoff-Baym ansatz and the wide band limit. LÄS MER