Sökning: "Sun Di"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden Sun Di.

  1. 1. Differences between solar atlases and implications on the solar oxygen abundance

    Kandidat-uppsats, Uppsala universitet/Institutionen för fysik och astronomi

    Författare :Elvira Andersson; [2022]
    Nyckelord :oxygen abundance; 777nm triplet; solar atlas;

    Sammanfattning : The determination of the solar oxygen abundance is a topic that has long beenunder debate, where the exact value has varied between researchers. These variationsin the oxygen abundance have implications on our understanding of the Sun and itsinterior as well as our understanding of other stars. LÄS MER

  3. 2. Accurate Abundances of Giant Stars in the Local disk: A manual analysis of IR APOGEE spectra

    Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation

    Författare :Ivalu Barlach Christensen; [2020]
    Nyckelord :Galactic Chemical Evolution; Astrophysics; Astronomy; IR Spectroscopy; Milky Way; Abundance; Physics and Astronomy;

    Sammanfattning : Purpose: In order to study the Galactic Chemical Evolution, elemental abundances are needed. The purpose of this work is to investigate the chemical evolution of the Milky Way by determining several elemental abundances of giants in the local disk. LÄS MER

  4. 3. Mechanical properties of SiC nanowires with polytypes

    Master-uppsats, Lunds universitet/Fasta tillståndets fysik; Lunds universitet/Fysiska institutionen

    Författare :Anders Vesti; [2019]
    Nyckelord :atomistic modeling; nanowires; molecular dynamics; simulation; SiC; silicon carbide; fracture behavior; nanomechanics; Physics and Astronomy;

    Sammanfattning : In this report, we model the mechanical properties and fracture behavior of SiC nanowires with different polytypes using Molecular Dynamics (MD) simulations. The mechanical properties investigated are the Young’s modulus, the maximum tensile stress and the fracture strain. The three polytype tested are SiC (3C), (2H) and (4H). LÄS MER

  5. 4. Heteroleptic Copper (I) Complexes as Photosensitizers in Dye-Sensitized Solar Cells

    Master-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Angela Raffaella Pia Pizzichetti; [2019]
    Nyckelord :Dye-Sensitized Solar Cells; Chemical and Environmental Engineering; Photovoltaic; Copper I complexes;

    Sammanfattning : Modern civilization highly depends on energy and finding alternative sources to fossil fuels becomes more and more necessary. The sun is the most abundant energy source available and exploiting it efficiently would result in a great environmental and economic breakthrough. LÄS MER

  7. 5. Back-tracing of water ions at comet 67P/Churyumov–Gerasimenko

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

    Författare :Marcus Håkansson; [2017]
    Nyckelord :Rosetta; plasma; solar system; Rosetta; plasma; solsystemet;

    Sammanfattning : This paper examines the neutral coma of comet 67P/Churyumov–Gerasimenko by using measurements of charged particles (water ions) and tracing them back to their place of ionisation. The measurements were taken from Rosetta’s Ion Composition Analyser. LÄS MER