Sökning: "orbital system"

Visar resultat 11 - 15 av 84 uppsatser innehållade orden orbital system.

  1. 11. POSSIBLE TIMING OF THE TRANSITION FROM PRE-INDUSTRIAL TO INDUSTRIAL CLIMATE IN THE CENTRAL TO NORTHERN OF SWEDEN, BASED ON PROXY DATA FROM TREE-RINGS

    Master-uppsats, Göteborgs universitet/Institutionen för geovetenskaper

    Författare :Mika Falkensjö Oppenheim; [2022-09-28]
    Nyckelord :Tree-ring; maximum latewood density MXD ; Scandinavia; pre-industrial; industrial climate;

    Sammanfattning : Earth’s climate has varied through time, with orbital forcing as the most dominant force on the climate system the last million years, causing glacial-interglacial cycles. The last glacial period ended about 11.6 thousand years (kyr), ago and the last interglacial maximum around 6.5 kyr ago. LÄS MER

  3. 12. Ab inito calculation of the formation energy of the sigma phases at 1000 Kelvin : With a five sublattice model for the ternary Iron-Chromium-Nickel system

    Kandidat-uppsats, KTH/Materialvetenskap

    Författare :Fabian Mathias Veid; [2022]
    Nyckelord :;

    Sammanfattning : This project investigates the σ-phase formation energy at 1000 Kelvin using Exact Muffin TIn Orbital (EMTO) method and considers the disordered local moment approach to handle the paramagnetism in a self-consistent manner. The sigma phase is detrimental and causes embrittlement when it occurs primarily in stainless steel and superalloys with Iron (Fe) and Chromium (Cr), which is why it is necessary to understand it better and therefore avoid it. LÄS MER

  4. 13. Computational Study of the Magnetocrystalline Anisotropy Energy of Ordered CoPt

    L1-uppsats, Uppsala universitet/Materialteori

    Författare :Max Fusté Costa; [2022]
    Nyckelord :;

    Sammanfattning : The study of the properties of magnetic materials is of primary importance in the development of newtechnologies. In this project, we aim to investigate the symmetries of some of the relevant properties ofa cobalt and platinum alloy that emerge from the symmetry of the crystal structure of the alloy. LÄS MER

  5. 14. Centennial Climate Variability

    Master-uppsats, Stockholms universitet/Institutionen för naturgeografi

    Författare :Thomas Askjær; [2022]
    Nyckelord :Climate variability; paleoclimate; climatemodelsimulations; proxyrecords; spectralanalysis; model proxycomparison;

    Sammanfattning : Throughout earths history, the climate have always naturally varied due to both external forcings and internal mechanisms. With the outlook on future climate change, it is important to understand the climate system and this includes its natural variability. Depending on the driving mechanisms, the variability happens over different timescales. LÄS MER

  7. 15. Electric propulsion of satellites as an alternative for implementation of a sunshade system

    Kandidat-uppsats, KTH/Fysik

    Författare :Maheen Arfan; Isabelle Bonnier; [2022]
    Nyckelord :Geoengineering; Sunshade system; Electric propulsion; Orbital mechanics; Sub-lagrange;

    Sammanfattning : As an alternative solution to global warming, this thesis explores the possibility of aspace-based geoengineering scheme that may prove worthwhile to implement in parallel toother environmental efforts that help mitigate impact of climate change. One suggestionof a geoengineering solution is deploying a large number of sunshades in the vicinity ofthe first Lagrange point of the Sun-Earth system, and this prospective sunshade projectwould serve to shield Earth from incident solar radiation. LÄS MER