Sökning: "Singularitet"

Visar resultat 1 - 5 av 9 uppsatser innehållade ordet Singularitet.

  1. 1. 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. 2. Cyberreligion : En tematisk innehållsanalys av simuleringsteologi och AI som teknisk singularitet i science fiction litteratur

    Kandidat-uppsats, Umeå universitet/Institutionen för idé- och samhällsstudier

    Författare :Linda Avad; [2022]
    Nyckelord :Artificiell Intelligens; Cyberreligion; Cyberkultur; Medialisering; Ockultur; Science Fiction; Sekularisering; Tematisk innehållsanalys; Återförtrollning;

    Sammanfattning : .... LÄS MER

  4. 3. Modeling of RF Heating in the JET Tokamak

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

    Författare :Emil Söderman; Wilhelm Holmberg; [2021]
    Nyckelord :fusion; tokamak; ICRH; RF heating; JET;

    Sammanfattning : Fusion reactors need methods to couple externalpower to confined plasmas. Ion cyclotron resonance heating(ICRH) is a method to radiate electromagnetic waves to couplepower to the kinetic motion of gyrating ions in a plasma. In thisreport we study ICRH with regard to the dispersive effects ofthe confined plasma in the JET tokamak. LÄS MER

  5. 4. Space Situational Awareness with the Swedish Allsky Meteor Network

    Master-uppsats, Uppsala universitet/Observationell astrofysik

    Författare :Simon Alinder; [2019]
    Nyckelord :SSA; space situational awareness; IOD; initial orbit determination; orbit determination; satellite identification; all-sky; rymdlägessituation; SSA; omloppsbana; banbestämning;

    Sammanfattning : This thesis investigates the use of the Swedish Allsky Meteor Network (SAMN) for observing, identifying, and determining the orbits of satellites. The overall goal of this project is to determine the feasibility of using such a network for Space Situational Awareness (SSA) purposes, which requires identification and monitoring of objects in orbit. LÄS MER

  7. 5. The Great Picard Theorem

    Kandidat-uppsats, Umeå universitet/Institutionen för matematik och matematisk statistik

    Författare :Dennis Wahlström; [2018]
    Nyckelord :;

    Sammanfattning : In this essay, we present a proof of the great Picard theorem by showing that a holomorphic function with an essential singularity attains infinitely many complex values in the vicinity of the singularity. ... LÄS MER