Sökning: "pc hastighet"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden pc hastighet.

  1. 1. On The Run: How Fast Runaway Stars Can Escape From Their Home Cluster?

    Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :Anna-Maria Söderman; [2022]
    Nyckelord :star cluster; runaway stars; velocity distribution; Physics and Astronomy;

    Sammanfattning : Galaxies contain a wide variety of star clusters with different properties. Each cluster is a possible source of runaway stars, which can be progenitors of supernovae in other parts of the galaxy than their home cluster. Considering runaway stars in galaxy simulations has shown to increase the galactic feedback. LÄS MER

  3. 2. Efficient, Scalable and Secure Vehicular Communication System : An Experimental Study

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Shubhanker Singh; [2020]
    Nyckelord :Vehicular Public-Key Infrastructure VPKI ; Vehicular Communication VC ; Beacon; Pseudonymous Certificate PC ; TESLA; Signature Verification; Cooperative Verification; Fordonsinfrastruktur med allmän nyckel; Fordonskommunikation; Beacon; Pseudonymt Certifikat PC ; TESLA; Signatur Verifiering; Kooperativ Verifiering;

    Sammanfattning : Awareness of vehicles’ surrounding conditions is important in today’s intelligent transportation system. A wide range of effort has been put in to deploy Vehicular Communication (VC) systems to make driving conditions safer and more efficient. Vehicles are aware of their surroundings with the help of authenticated safety beacons in VC systems. LÄS MER

  4. 3. Making Hypervelocity Stars

    Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :Frans Forsberg; [2020]
    Nyckelord :Stellar Dynamics; Binary Stars; Galactic Centre; Binary Relaxation; Physics and Astronomy;

    Sammanfattning : In this thesis, I investigate if the binaries that are being tidally disrupted by means of the Hills mechanism, producing hypervelocity stars, could have been transported to the galactic centre by two-body scattering. To survive a scattering event, the binary must be hard, meaning that the binding energy of the binary is higher than the kinetic energy of the collider. LÄS MER

  5. 4. Normalvärden och F-waves vid registrering på tibialis anterior vid undersökning av peroneus communis med elektroneurografi

    Kandidat-uppsats, Högskolan Kristianstad/Fakulteten för naturvetenskap

    Författare :Malin Lundström; [2019]
    Nyckelord :Peroneus communis; Tibialis anterior; Extensor digitorum brevis; Entrapment neuropathy; Normal values; F-waves; Peroneus communis; Tibialis anterior; Extensor digitorum brevis; Tillklämningsneuropati; Normalvärden; F-waves;

    Sammanfattning : För att undersöka misstänkt tillklämningsneuropati i peroneus communis (PC) används elektroneurografi, där elektrisk stimulering möjliggör undersökning av nervledningshastigheter, svarsamplitud och överledningstid. Vid opålitlig registrering på extensor digitorium brevis (EDB), görs registreringen på tibialis anterior (TA). LÄS MER

  7. 5. Tidal Streams as a Probe of the Milky Way Assembly History

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

    Författare :Espen Kirkesæther Brun; [2016]
    Nyckelord :Astrophysics; Astronomy; Dynamics; Galactic; Tidal Streams; Stellar Streams; Dark Matter; Subhalos; Physics and Astronomy;

    Sammanfattning : The current Lambda Cold Dark Matter cosmology predicts galaxy growth by hierarchical merging, leading to galaxy substructure like tidal streams and dark matter subhalos devoid of stars. The goal of this thesis is to investigate whether tidal stream-subhalo interactions can leave observable gaps in the streams, and at which rate this might happen in a galaxy like the Milky Way. LÄS MER