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Visar resultat 6 - 10 av 2773 uppsatser innehållade orden v för.

  1. 6. Gravitational Collapse of a Massless Scalar Field in a Theory of Minimally Modified Gravity

    Master-uppsats, KTH/Fysik

    Författare :Atabak Fathe Jalali; [2024]
    Nyckelord :Theoretical physics; astrophysics; modified gravity; minimally modified gravity; gravitational collapse; VCDM; scalar collapse; apparent horizon; numerical relativity; Teoretisk fysik; astrofysik; modifierad gravitation; minimalt modifierad gravitation; gravitationskollaps; VCDM; skalär kollaps; uppenbar horisont; numerisk relativitet;

    Sammanfattning : This thesis explores the spherically symmetric gravitational collapse of a massless scalar field in a minimally modified gravity theory denoted VCDM (V replaces $\Lambda$ in the $\Lambda$CDM abbreviation), a class of theories propagating the same degrees of freedom as general relativity at the expense of broken 4D diffeomorphism invariance. Numerical evolution of the equations of motion reveals that for small initial scalar profile amplitudes, no black hole forms from the collapse. LÄS MER

  3. 7. Juice/JDC ion measurement perturbations caused by spacecraft charging in the solar wind and Earth’s magnetosheath

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

    Författare :Derek van Winden; [2024]
    Nyckelord :Juice; Jupiter Icy Moons Explorer; JDC; Jovian plasma Dynamics and Composition analyzer; Particle Environment Package; PEP; Jupiter; Ganymede; Callisto; Europa; solar wind; magnetosheath; spacecraft charging; Spacecraft Plasma Interaction Software; SPIS; charging; plasma; measurement perturbations; perturbation; distortion; particle detector; Institutet för Rymdfysik; IRF; Dublin Institute for Advanced Studies; DIAS; European Space Agency; ESA;

    Sammanfattning :  In July 2031, a new chapter in the exploration of the Jovian system will begin with the arrival of the Jupiter Icy Moons Explorer (Juice) at Jupiter. Launched on April 14 2024 as part of ESA’s Cosmic Vision programme, the mission aims to study Jupiter and its icy Galilean moons Callisto, Europa, and Ganymede. LÄS MER

  4. 8. Hormonal Influence on the Proliferation Potential of C17.2 Neuronal Progenitor Cells

    Kandidat-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Alexander Mangano; [2024]
    Nyckelord :;

    Sammanfattning : The brain is arguably the most complex organ of the body: Controlling muscles, maintaining homeostasis, processing information. It has the longest developmental period of any organ, and hormones are essential during its development. LÄS MER

  5. 9. Abortfrågan i USA post-Roe : Säkerhet för vem och mot vad?

    Kandidat-uppsats, Försvarshögskolan

    Författare :Klara Malmén; [2024]
    Nyckelord :Säkerhet; Hälsosäkerhet; Feministiska säkerhetsstudier; Abortfrågan i USA; Roe v. Wade;

    Sammanfattning : This study aims to analyze the policy discourse held by interest groups in the United States following the repeal of Roe, the constitutional right to abortion, from a security perspective. Additionally, it seeks to examine what these organizations believe needs protection and against what, and the potential consequences for womenś health security in the USA. LÄS MER

  7. 10. Initial Development and Validation of Language-Based Assessments for Meaningful Change

    Kandidat-uppsats, Lunds universitet/Institutionen för psykologi

    Författare :Ulrika Söderström; [2024]
    Nyckelord :meaningful change; depression; Large Language Models; AI; Social Sciences;

    Sammanfattning : Meaningful change has been discussed in multiple studies, with the recurring question of how it could be conceptualized and assessed to identify what determines meaningful change and where it occurs. Previous studies have conducted statistical analyses based on traditional rating scales (i.e., the PHQ-9) to assess meaningful change. LÄS MER