Now showing items 1-20 of 112

• #### A Class of Tests for Trend in Time Censored Recurrent Event Data ﻿

(Journal article; Peer reviewed, 2019-04)
Statistical tests for trend in recurrent event data not following a Poisson process are generally constructed for event censored data. However, time censored data are more frequently encountered in practice. In this paper ...
• #### A machine learning approach to identify regions in the myocardium with information indicative of the risk of arrhythmia in patients with previous myocardial infarction ﻿

(Master thesis, 2021)
• #### Algebraens fundamentalteorem ﻿

(Bachelor thesis, 2021)
Denne bacheloroppgaven tar utgangspunkt i Algebraens fundamentalteorem og polynomlikningens historie. Algebraens fundamentalteorem sier at hver polynomlikning av grad n med komplekse koeffisienter har minst én kompleks ...
• #### Algebraens fundamentalteorem ﻿

(Bachelor thesis, 2021)
• #### An Introduction to Supersymmetry ﻿

(Masteroppgave/UIS-TN-IMF/2019;, Master thesis, 2019-06-14)
This thesis gives an introduction to supersymmetry. We compute the Poincaré- conformal- and Clifford algebra in any dimension. Most examples are in four dimensions, including the Wess-Zumino model and supersymmetric gauge ...
• #### Analytic structure of nonhydrodynamic modes in kinetic theory ﻿

(Peer reviewed; Journal article, 2019-09)
How physical systems approach hydrodynamic behavior is governed by the decay of nonhydrodynamic modes. Here, we start from a relativistic kinetic theory that encodes relaxation mechanisms governed by different timescales ...
• #### Analyticity in Several Complex Variables ﻿

(Masteroppgave/UIS-TN-IMF/2020;, Master thesis, 2020)
there are many similarities between complex analysis in several variables and one variable but there are also some important differences between holomorphic functions of a single variable and holomorphic functions of $n$ ...
• #### Anomalous low-temperature thermodynamics of QCD in strong magnetic fields ﻿

(Journal article; Peer reviewed, 2017-11)
The thermodynamics of quantum chromodynamics at low temperatures and in sufficiently strong magnetic fields is governed by neutral pions. We analyze the interacting system of neutral pions and photons at zero baryon chemical ...
• #### Atomic scattering factors and atomic cross-sections in x-ray crystallography ﻿

(Masteroppgave/UIS-TN-IMF/2018;, Master thesis, 2018-06-15)
Crystallographers as well as other scientists and engineers need reliable sets of physical data. Focus is here set upon the x-ray attenuation coefficients (the atomic photoeffect cross-section, and the incoherent (Compton) ...
• #### Bottomonium suppression at RHIC and LHC ﻿

(Peer reviewed; Journal article, 2019-02)
The strong suppression of heavy quarkonia is a good indicator that one has generated a quark-gluon plasma (QGP) in an ultrarelativistic heavy ion collision. Recent advancements in first principles calculations of the heavy ...
• #### Bryan’s Maximum Entropy Method—Diagnosis of a Flawed Argument and Its Remedy ﻿

(Peer reviewed; Journal article, 2020-09)
The Maximum Entropy Method (MEM) is a popular data analysis technique based on Bayesian inference, which has found various applications in the research literature. While the MEM itself is well-grounded in statistics, I ...
• #### Charged FENE-P non-newtonian fluid model ﻿

(Masteroppgave/UIS-TN-IMF/2018;, Master thesis, 2018-06-15)
• #### Chiral density wave versus pion condensation at finite density and zero temperature ﻿

(Journal article; Peer reviewed, 2018-04)
The quark-meson model is often used as a low-energy effective model for QCD to study the chiral transition at finite temperature T, baryon chemical potential μB, and isospin chemical potential μI. We determine the parameters ...
• #### Chiral soliton lattice phase in warm QCD ﻿

(Peer reviewed; Journal article, 2021-11)
We analyze the phase diagram of quantum chromodynamics at low-to-moderate temperature, baryon chemical potential and external magnetic field within chiral perturbation theory at next-to-leading order of the derivative ...
• #### Collider phenomenology of a unified leptoquark model ﻿

(Peer reviewed; Journal article, 2020-05)
We demonstrate that in a recently proposed unified leptoquark model based on the gauge group SU(4)C×SU(2)L×U(1) R significant deviations from the Standard Model values of R K and R K ∗ can be accommodated without any need ...
• #### Comment on ''Szekeres universes with homogeneous scalar fields'' ﻿

(Peer reviewed; Journal article, 2021-04)
In two recently published articles, Barrow and Paliathanasis (2018, 2019) [1, 2] claim to have found exact solutions of Einstein’s field equations belonging to the class of non-trivial (i.e., spatially inhomogeneous) ...
• #### Competing risk analysis of Norwegian mortality ﻿

(Masteroppgave/UIS-TN-IMF/2019;, Master thesis, 2019-06)
Survival data analysis is a set of statistical methodologies that is used to model time until a certain event occurs. Competing risks data arise frequently in survival data from medical research in situations when individuals ...
• #### Correlated insulators in twisted bilayer graphene ﻿

(Peer reviewed; Journal article, 2021-03)
Experiments on graphene bilayers, where the top layer is rotated with respect to the one below, have displayed insulating behavior when the moiré bands are partially filled. We calculate the charge distributions in these ...
• #### Den deriverte, tangenter og elevers forståelse av disse. ﻿

(Master thesis, 2021)
I dette forskningsarbeidet forsøker jeg å få et innblikk i elever med fagene S2 og R2 sin forståelse av den deriverte og tangenter. Hva slags begrepsforståelse har elevene? Er deres forståelse instrumentell og/eller ...
• #### Derivations of the Young-Laplace equation ﻿

(Journal article, 2021-04)
The classical Young-Laplace equation relates capillary pressure to surface tension and the principal radii of curvature of the interface between two immiscible fluids. In this paper the required properties of space curves ...