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Showing result 1 - 5 of 231 essays matching the above criteria.

  1. 1. Measuring copper abundances in the Galactic Bulge

    University essay from Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionen

    Author : Nikolei Höglinger; [2024]
    Keywords : Copper; Galaxy: abundances; Galaxy: bulge; Chemical Evolution; Physics and Astronomy;

    Abstract : Context: The chemical evolution of Cu in the Galactic bulge have been studied in a few studies using red giant branch stars, but the ages of individual red giant stars are difficult to determine. In addition, the bulge has been a challenging region of the Milky Way galaxy to obtain high-resolution spectra of stars, except when observing through certain few small fields into the bulge that are known to have low extinction. READ MORE

  3. 2. N-body simulations of exoplanets and their moons

    University essay from Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionen

    Author : Lydia Schollmeier; [2024]
    Keywords : Physics and Astronomy;

    Abstract : The planet-planet interactions in a many-planet system cannot be analytically calculated. Instead, they have to be investigated by using an N-body simulation. I discuss three questions about the N-body interactions in planetary systems: The first two are on the system 55 Cnc, a system with five known planets around a K-type star. READ MORE

  4. 3. Direct solar dryer

    University essay from Lunds universitet/Institutionen för energivetenskaper

    Author : Jamyang Dorji; Lungten Lungten; [2023]
    Keywords : Open air drying; Thermocouple; Air circulation; Sustainable farming; Drying Efficiency; Drying Chamber; Airflow; Technology and Engineering;

    Abstract : The study presents the design, construction, and performance evaluation of a direct solar dryer with a focus on enhancing the post-harvest preservation of fruits. The increasing demand for the dry fruits in both the local and export markets demand effective and environmentally friendly drying methods. READ MORE

  5. 4. Research of appropriate luminance level of monitor screens in workplace

    University essay from Högskolan Dalarna/Informatik

    Author : Mengfei Wang; Shiqi Shu; [2023]
    Keywords : Screen brightness; Paradigm Color; Lighting conditions; Human eye preference; skärmens ljusstyrka; Paradigm färg; ljusförhållanden; Mänskliga ögonpreferenser;

    Abstract : MÅL: Huvudsyftet med den här studien är att undersöka hur naturligt ljus påverkar det mänskliga ögats preferens för skärmens ljusstyrka när man tittar på en datorskärm. METODER: Tre experiment genomförs för att mäta i vilken utsträckning solljus förändrar bakgrundsljuset i form av solstrålning. READ MORE

  6. 5. Analyzing Synthetic Spider Silk-based Diffraction Grids for the Sunshade Project

    University essay from KTH/Skolan för teknikvetenskap (SCI)

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

    Abstract : 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. READ MORE