Sökning: "quasi states"

Visar resultat 1 - 5 av 28 uppsatser innehållade orden quasi states.

1. 1. Localized and extended states in finite-sized mosaic Wannier-Stark lattices

   Master-uppsats, KTH/Tillämpad fysik

   Författare :Emrah Tortumlu; [2023]
   Nyckelord :Applied Physics; Condensed matter physics; quantum technology; quantum nanophotonics; localization; mobility edge; phase transition; Tillämpad Fysik; Kondenserade materiens fysik; kvantteknologi; kvantnanofotonik; lokalisering; fasövergång;

   Sammanfattning : Anderson localization occurs when an otherwise conductive solid becomes insulatingdue to a sufficiently large degree of disorder in the medium. The electron band energy(as a function of disorder) at which this transition between extended and localizedelectron states occur is called the mobility edge (ME) and is energy-dependent only in3-dimensional systems. LÄS MER

3. 2. Understanding the Mob : An Inside Perspective on Harassment and Threats Against Journalists in Sweden

   Master-uppsats, Stockholms universitet/Institutionen för mediestudier

   Författare :Jakob Lind; [2023]
   Nyckelord :Journalism; harassment; threats; Mob Censorship; New Censorship Theory;

   Sammanfattning : High levels of harassment and threats against journalists have been observed globally. This thesis examines the lived experience of harassment and threats against journalists in Sweden through the lens of New Censorship Theory and Mob Censorship. LÄS MER

4. 3. Can ObamaCare's Impact be Quantified using RomneyCare as a Comparison Group? : A Difference-in-differences in Reverse Study of Uninsurance in Rhode Island

   Master-uppsats, Jönköping University/Internationella Handelshögskolan

   Författare :João Mateus; [2023]
   Nyckelord :Health Economics; Difference-in-differences in Reverse; Natural Experiment; Uninsurance;

   Sammanfattning : The US consistently lags nearly all developed nations in percentage of population covered by basic health insurance. To address this, ‘RomneyCare’ was implemented in Massachusetts (state level) in 2006, and later on ObamaCare’s similar major provisions came into effect in 2014 at the federal level. LÄS MER

5. 4. Parameter Update Schemes for Hidden Markov Models applied to Financial Returns

   Master-uppsats, Lunds universitet/Matematisk statistik

   Författare :Sigfrid Forsberg; [2022]
   Nyckelord :Markov Chain; Finance; Hidden Markov Model; Generalized Autoregressive Score Model; S P-500; Nikkei; Adaptive Model; Volatility; Regime-switching Model; Line-Search Algorithm; Predictor-Corrector; Quasi-Newton; Mathematics and Statistics;

   Sammanfattning : This thesis was dedicated to investigating the use of different parameter update schemes for Hidden Markov models with time-varying parameters, with an emphasis on developing alternatives to the quasi-Newton step. The focus was on applications to financial returns, using data from the S\&P-500 and the Nikkei index, and for comparison, a trial using synthetic data was also performed. LÄS MER

7. 5. Theory of Time-Dependent Transport and Levitons in Nanowires

   Master-uppsats, Lunds universitet/Fasta tillståndets fysik

   Författare :Jakob Westerberg; [2021]
   Nyckelord :leviton; Tkwant; tight-binding model; solid-state physics; time-dependent transport; scattering theory; quantum mechanics; computer simulation; nanowire; Physics and Astronomy;

   Sammanfattning : An interesting type of quasi-particles in solid-state materials are the so-called levitons. These are single- electron excitations above the Fermi-level that do not produce any hole states when carrying an integer multiple of the elementary charge. LÄS MER