Blar i Department of Mathematics and Physics (TN-IMF) på tittel

Real time simulation of quarkonium in a thermal medium using a 3D Lindblad equation

Matre, Aslak (Master thesis, 2022)

Using a new finite difference operator RN-SBP that has recently been developed and used for 1D simulations of the Lindblad equation, we extend it to the 3D case. We have not quite been able to implement the RN-SBP properly ...

Real-Time Complex Langevin - A Differential Programming Perspective

Alvestad, Daniel (PhD thesis UiS;, Doctoral thesis, 2023)

In this thesis, I aim to find solutions to the NP-hard sign-problem that arises when modeling strongly correlated systems in real-time. I will use the complex Langevin (CLE) method, and address its problem of runaway ...

Real-time quantum dynamics, path integrals and the method of thimbles

Mou, Zonggang; Saffin, Paul M.; Tranberg, Anders; Woodward, Simon (Peer reviewed; Journal article, 2019)

Direct numerical evaluation of the real-time path integral has a well-known sign problem that makes convergence exponentially slow. One promising remedy is to use Picard-Lefschetz theory to flow the domain of the field ...

Realistic in-medium heavy-quark potential from high statistics lattice QCD simulations

Petreczky, Peter; Rothkopf, Alexander Karl; Weber, Johannes Heinrich (Peer reviewed; Journal article, 2019)

We present our first results on a direct computation of the complex in-medium heavy quark potential from realistic lattice QCD simulations. Ensembles with Nτ = 12 from the HotQCD and TUMQCD collaboration offer unprecedented ...

Reconstructing parton distribution functions from Ioffe time data: from Bayesian methods to Neural Networks

Karpie, Joseph; Orginos, Kostas; Rothkopf, Alexander Karl; Zafeiropoulos, Savvas (Peer reviewed; Journal article, 2019)

The computation of the parton distribution functions (PDF) or distribution amplitudes (DA) of hadrons from first principles lattice QCD constitutes a central open problem. In this study, we present and evaluate the efficiency ...

Relative Survival Methods – Theory, Applications and Extensions to Monitoring

Tran, Jimmy Huy (Master thesis, 2022)

In cancer research, one is often interested in the part of the hazard which corresponds to the disease. If the cause of death is unknown as in cancer registry data, the standard methods in survival analysis do not distinguish ...

The role of initial state radiation in quenched jets

Zapp, Korinna Christine (Peer reviewed; Journal article, 2022)

Jet quenching in heavy ion collisions and in particular the sub-structure of quenched jets are promising tools for investigating the microscopic processes underlying jet quenching and the background medium's response to ...

Rovdyr-Bytte Modellen

Serigstad, Alexander. (Bachelor thesis, 2021)

The thesis is about the Lotka-Volterra equations which describes, trough differential equations, a theoretical situation where one species (predator) lives on a another species (prey), while the prey lives on a different ...

RSA-kryptering med diskusjon om bruk av det i skolen

Hjellup, Olav Hansen (Master thesis, 2022)

Masteroppgaven gir en grunnleggende introduksjon av RSA kryptering, og angrep på RSA kryptering. Vi presenterer, modulær aritmetikk, tallteorien som er nødvendig for å forstå RSA kryptering, og en generell innføring i hva ...

Sammenheng mellom dentalt plakk og forkalkninger i arterievegger

Volkova, Olga (Bachelor thesis, 2022)

Sample size requirements for agreement studies

Tolokonnikova, Bogdana (Masteroppgave/UIS-TN-IMF/2019;, Master thesis, 2019-06)

This thesis examines requirements of subject sample size while planning a medical experiment, describes some known types of measures of inter-rater agreement and discovers some new useful results in this study area. The ...

Scattering amplitudes of massive Nambu-Goldstone bosons

Brauner, Tomas; Jakobsen, Martin Fonnum (Journal article; Peer reviewed, 2018-01)

Massive Nambu-Goldstone (mNG) bosons are quasiparticles the gap of which is determined exactly by symmetry. They appear whenever a symmetry is broken spontaneously in the ground state of a quantum many-body system and at ...

Science AMA Series: Ask the Society of Environmental Toxicology and Chemistry (SETAC) anything about Pharmaceuticals in the environment!

Opsahl, Eystein (Journal article, 2017)

The Society of Environmental Toxicology and Chemistry (SETAC) is hosting the SETAC North America 38th annual meeting this week and we have tied this AMA to a specific session, “Pharmaceuticals in the environment: Potential ...

Second-Order PDEs in 3D with Einstein–Weyl Conformal Structure

Berjawi, S.; Ferapontov, E.V.; Kruglikov, Boris; Novikov, V.S. (Peer reviewed; Journal article, 2021)

Einstein–Weyl geometry is a triple (D,g,ω) where D is a symmetric connection, [g] is a conformal structure and ω is a covector such that ∙ connection D preserves the conformal class [g], that is, Dg=ωg ; ∙ trace-free part ...

Self-reported sleep fragmentation and sleep duration and their association with cognitive function in PROTECT, a large digital community-based cohort of people over 50

Aakre, Jon Arild; Schulz, Jörn; Ballard, Clive; Corbett, Anne; Bjorvatn, Bjørn; Aarsland, Dag; Creese, Byron; Hampshire, Adam; Brooker, Helen; Testad, Ingelin (Peer reviewed; Journal article, 2023)

Objective Sleep is vital for normal cognitive function in daily life, but is commonly disrupted in older adults. Poor sleep can be detrimental to mental and physical health, including cognitive function. This study assessed ...