Sökning: "gåta"

Visar resultat 1 - 5 av 34 uppsatser innehållade ordet gåta.

  1. 1. What limits the luminosity of red supergiants?

    Kandidat-uppsats, Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionen

    Författare :Eric Svensson; [2023]
    Nyckelord :Stellar evolution; Red supergiants; Red giants; Luminosity; Binary stars; Binary star systems; Binary star interactions; Binary stellar evolution; Humphreys-Davidson limit; Upper luminosity limit; BSE; Population synthesis; Simulations; M31; LMC; SMC; Metallicity; Mass transfer; Merging; Physics and Astronomy;

    Sammanfattning : The observed upper limit of the luminosity of red supergiants, often called the Humphreys-Davidson limit, has recently been shown to be independent of metallicity and to not be explainable by single star evolution – findings that both contradict established ideas of the origins of the limit. It is now known that the vast majority of stars with sufficient mass to possibly evolve into red supergiants above the limit interact with companion stars at some point during their lives. LÄS MER

  2. 2. Hur gammal är jordens inre kärna?

    Kandidat-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Tim Bergström; [2023]
    Nyckelord :Inner core; thermal conductivity; convection; Earth’s magnetic field; paleomagnetism; Earth and Environmental Sciences;

    Sammanfattning : Åldern för jordens inre kärna är en gåta som har förbryllat forskare i många decennier. Allt från en ålder lika hög som jordens magnetfält (mellan 3,5 och 4,2 Ga) i den ena änden, ner till 0,5 Ga i den andra änden. LÄS MER

  3. 3. Benchmarking a memetic algorithm for global all-atom protein-protein docking with backbone flexibility

    Kandidat-uppsats, Lunds universitet/Kemiska institutionen

    Författare :Vera Karlin; [2022]
    Nyckelord :biochemistry; EvoDOCK; algorithm; protein; iRMSD; DockQ; CAPRI; Chemistry;

    Sammanfattning : Determining how proteins interact with each other to form complexes is very important for understanding both disease and cellular functions, but experimentally determining the structures of these complexes is both tedious and slow, which is why a great number of protein-protein docking algorithms have been developed to predict them. To this day, conformational changes in protein backbones have been one of the largest challenges when making docking predictions. LÄS MER

  4. 4. Centerpartiets mittenidentitet : Religiöst beteende i den politiska vardagen

    Master-uppsats, Linnéuniversitetet/Institutionen för samhällsstudier (SS)

    Författare :Stellan Sörensen; [2022]
    Nyckelord :The Centre Party; the broad middle; the middle; politics; political positions; ideological party positions; secular religion; functional religion; Durkheim; rituals; moral community; collective identity; symbolic boundaries; decoupling; policy-practice decoupling; Centerpartiet; den breda mitten; mitten; politik; politiska positioner; ideologiska partipositioner; sekulär religion; funktionell religion; Durkheim; ritualer; moralisk gemenskap; kollektiv identitet; symboliskt gränsarbete; decoupling; policy-praktik decoupling;

    Sammanfattning : Den breda mitten, eller bara mitten, är ett centralt begrepp i Centerpartiets identitet. Trots detta är Centerpartiets sakpolitik inte särskilt positionerad i ”mitten”. Partiet är snarare det mest högerlutande partiet av samtliga riksdagspartier vad gäller ekonomiska frågor. LÄS MER

  5. 5. Modelling of gene regulatory and spatial mechanisms which pattern the early human neural tube

    Magister-uppsats, Lunds universitet/Beräkningsbiologi och biologisk fysik - Genomgår omorganisation

    Författare :Fredrik Bertilsson; [2022]
    Nyckelord :Biophysics; systems biology; gene regulatory networks; neural tube; isthmic organizer; midbrain-hindbrain boundary; WNT; FGF; morphogens; reaction-diffusion; finite-difference; 3D modelling; Physics and Astronomy;

    Sammanfattning : Tissue patterning during development is thought to be driven largely by gene regulatory responses to spatial gradients of molecular signals, known as morphogens. In this thesis, early patterning of the human neural tube is studied using two different gene regulatory network models. LÄS MER