Sökning: "atomic model"

Visar resultat 1 - 5 av 100 uppsatser innehållade orden atomic model.

1. 1. A Machine Learning Approach on Analysis of Emission Spectra for Application in XFEL Experiments

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för fysik och astronomi

   Författare :Harald Agelii; [2023]
   Nyckelord :Structural biology; Machine learning; Neural networks; emission spectrum; XFEL; X-ray free electron laser; SFX; Serial femtosecond X-ray crystallography; Proteins; Diagnostics;

   Sammanfattning : In this thesis we investigate two potential applications of machine learning in the context of X-ray imaging and spectroscopy of biological samples, particularly such using X-ray free electron lasers (XFEL). We first investigate the possibility of using an emission spectrum, recorded from a sample after being probed by an incident X-ray, as a diagnostic tool. LÄS MER

3. 2. Defining dark jets at the particle level

   Master-uppsats, Lunds universitet/Partikel- och kärnfysik; Lunds universitet/Fysiska institutionen

   Författare :Gustav Lindberg; [2023]
   Nyckelord :Particle physics; Dark matter; QCD; Physics and Astronomy;

   Sammanfattning : One hypothesis that attempts to explain dark matter is dark QCD, which suggests that there would be a dark sector made up of dark quarks. Dark quarks would interact with each other through dark QCD similar to how Standard Model quarks interact with each other through Standard Model QCD. LÄS MER

4. 3. Terminating Apartheid's Atomic Bomb

   Kandidat-uppsats, Lunds universitet/Statsvetenskapliga institutionen

   Författare :Oskar Hedman; [2023]
   Nyckelord :South Africa; Nuclear Disarmament; Tripart Accord; Frederik de Klerk; Nuclear Non-proliferation Treaty; Law and Political Science;

   Sammanfattning : South Africa secretly produced six and a half nuclear weapons from 1978-1989 before undertaking a complete nuclear disarmament between 1989-1991; it is the only instance in history of when a state has discarded an indigenously developed nuclear arsenal and presents a unique case for studying the nuclear decision-making of states. This thesis is a theory-testing case study where I, by conducting a qualitative content analysis of previous research on South Africa’s nuclear rollback, examine how well Scott D Sagan’s nuclear policy model can explain the nuclear disarmament of South Africa. LÄS MER

5. 4. From AEC to NRC: A Paradigm Shift in U.S. Nuclear Energy Regulation and its Consequences for the Industry

   D-uppsats, Handelshögskolan i Stockholm/Institutionen för nationalekonomi

   Författare :Benjamin Leopardo; [2023]
   Nyckelord :regulation; nuclear energy; energy economics; industrial organization; synthetic control;

   Sammanfattning : Concerns over energy security and climate change are pushing countries to reconsider their stances on nuclear energy and plan new buildouts. The success of nuclear energy has historically varied greatly, depending to a great extent on the legal and regulatory environment. LÄS MER

7. 5. The solar abundance of beryllium : constraining the solar problem via non-LTE modelling

   Kandidat-uppsats,

   Författare :Daria Ogneva; [2023]
   Nyckelord :atomic processes; radiative transfer; abundance;

   Sammanfattning : Accurately determining the solar abundance of beryllium is a key to calibrate transport processes at the base of convective zone, which in turn is an improvement upon existing solar models and general understanding of the physical processes within the Sun. To determine an abundance, assumptions about the solar atmosphere must be made. LÄS MER