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Visar resultat 1 - 5 av 16 uppsatser som matchar ovanstående sökkriterier.

  1. 1. A Sane Voice amidst the Madness : The Prehistory of the 2023 World’s Stance on the Verge of a Nuclear War between the East and the West as a Logical Aftermath of the Post-Cold War History. How and Why Do We End Up in a State of a Cold War Again?

    Master-uppsats, Uppsala universitet/Teologiska institutionen

    Författare :Vasil Shaptun; [2023]
    Nyckelord :Cold War; NATO; Russia; Post-Cold War; USA;

    Sammanfattning : “I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones.” ― Albert Einstein Today we live in very interesting times for researchers but at the same time very dangerous for the whole human existence and our planet. LÄS MER

  3. 2. LISA’s Phasemeter Structural-Thermal Model test campaign and computational model calibration

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

    Författare :Richard Johansson; [2022]
    Nyckelord :Richard Johansson; LISA;

    Sammanfattning : This work aims to plan, prepare and perform a test campaign of the Back-End Electronics(BEE) module in the phasemeter instrument on board the Laser Interferometer Space Antenna(LISA). Results from the test are analyzed to thermally characterize the BEE module as wellto evaluate how successfully an aluminum enclosure mounted on the BEE can dissipate heatloads from the BEE. LÄS MER

  4. 3. Markov Chain Monte Carlo (MCMC) and Bayesian Inference for Gravitational Waves

    Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :Christine Andersson; [2021]
    Nyckelord :Gravitational Waves; LISA; LISA mission; Bayesian Inference; Markov Chain Monte Carlo; MCMC; Bayes’ Theorem; stochastic sampling; Metropolis Hastings; histograms; Physics and Astronomy;

    Sammanfattning : The Laser Interferometer Space Antenna (LISA) is a space borne gravitational wave detec- tor set to launch in 2034, with the objective of detecting and studying the Gravitational Waves (GWs) of our universe. So far, ground-based detectors such as the Laser Interferometer Gravitational-Wave Observatory (LIGO) have been successful in detecting GWs, but the limitations of ground based detectors is what makes LISA so special. LÄS MER

  5. 4. On the (1/2,1/2) Representation of the Lorentz Group and the Discrete CPT Symmetries

    Kandidat-uppsats, Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

    Författare :Nikolaj Skog Pirinen; [2021]
    Nyckelord :The Lorentz Group; Group Theory; Quantum Field Theory; CPT; Symmetry; Spinors; Representation Theory; Physics and Astronomy;

    Sammanfattning : This thesis derives the explicit form of the elements of the (1/2,1/2) representation of the Lorentz group, by actually performing a direct product of the chiral (1/2,0)- and (0,1/2)-representations. The Lorentz transformations of fourvectors are thereafter recovered from this direct-product representation, allowing the derivation of a transformation matrix between the fourvector- and direct product basis. LÄS MER

  7. 5. Mass-Singularity Structure of QED and Perturbative Quantum Gravity Scatterings

    Kandidat-uppsats, Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

    Författare :Santiago Londono Castillo; [2020]
    Nyckelord :perturbative quantum gravity; QED; mass singularities; collinear singularities; soft singularities; singularity cancellation; graviton; Physics and Astronomy;

    Sammanfattning : In this thesis, the mass singularities occurring in the cross-section of electron scattering processes are investigated. Two types of scatterings are studied: Quantum Electrodynamics (QED) scatterings, and Perturbative Quantum Gravity (PQG) scatterings. LÄS MER