Department of Mathematics and Physics (TN-IMF): Nye registreringer
Viser treff 241-260 av 310
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On Universal Black Holes
(Peer reviewed; Journal article, 2020)Recent results on universal black holes in d dimensions are summarized. These are static metrics with an isotropy-irreducible homogeneous base space which can be consistently employed to construct solutions to virtually ... -
Universal p-form black holes in generalized theories of gravity
(Peer reviewed; Journal article, 2020-10)We explore how far one can go in constructing d-dimensional static black holes coupled to p-form and scalar fields before actually specifying the gravity and electrodynamics theory one wants to solve. At the same time, we ... -
Towards the nucleon hadronic tensor from lattice QCD
(Peer reviewed; Journal article, 2020-06)We present the first calculation of the hadronic tensor on the lattice for the nucleon. The hadronic tensor can be used to extract structure functions in deep inelastic scatterings and to provide information for neutrino-nucleon ... -
Quantum tunnelling, real-time dynamics and Picard-Lefschetz thimbles
(Peer reviewed; Journal article, 2019-11)We follow up the work, where in light of the Picard-Lefschetz thimble approach, we split up the real-time path integral into two parts: the initial density matrix part which can be represented via an ensemble of initial ... -
Mathematical Analysis of Two Competing Cancer Cell Migration Mechanisms Driven by Interstitial Fluid Flow
(Peer reviewed; Journal article, 2020-04)Recent experimental work has revealed that interstitial fluid flow can mobilize two types of tumor cell migration mechanisms. One is a chemotactic-driven mechanism where chemokine (chemical component) bounded to the ... -
Thermalization and dynamical spectral properties in the quark-meson model
(Peer reviewed; Journal article, 2020-07)We investigate the nonequilibrium evolution of the quark-meson model using two-particle irreducible effective action techniques. Our numerical simulations, which include the full dynamics of the order parameter of chiral ... -
Tunneling in Fermi systems with quadratic band crossing points
(Peer reviewed; Journal article, 2020-08)We investigate the tunneling of quasiparticles through a rectangular potential barrier of finite height and width, in 2d and 3d semimetals with band structures consisting of a quadratic band crossing point. We compute the ... -
Heavy quark diffusion in an overoccupied gluon plasma
(Peer reviewed; Journal article, 2020-09)We extract the heavy-quark diffusion coefficient κ and the resulting momentum broadening 〈p2〉 in a far-from-equilibrium non-Abelian plasma. We find several features in the time dependence of the momentum broadening: a short ... -
Effect of Interactions on the Quantization of the Chiral Photocurrent for Double-Weyl Semimetals
(Peer reviewed; Journal article, 2020-06)The circular photogalvanic effect (CPGE) is the photocurrent generated in an optically active material in response to an applied AC electric field, and it changes sign depending on the chirality of the incident circularly ... -
Quarkonium phenomenology from a generalised Gauss law
(Peer reviewed; Journal article, 2019-05)We present an improved analytic parametrisation of the complex in-medium heavy quark potential derived rigorously from the generalised Gauss law. To this end we combine in a self-consistent manner a non-perturbative vacuum ... -
Symmetry and Equivalence in Teleparallel Gravity
(Peer reviewed; Journal article, 2020-07)In theories such as teleparallel gravity and its extensions, the frame basis replaces the metric tensor as the primary object of study. A choice of coordinate system, frame basis, and spin-connection must be made to obtain ... -
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 ... -
Opacity dependence of elliptic flow in kinetic theory
(Peer reviewed; Journal article, 2019-09)The observation of large azimuthal anisotropies vn in the particle spectra of proton–proton (pp) and proton–nucleus (pA) collisions challenges fluid dynamic interpretations of vn, as it remains unclear how small collision ... -
Information in Local Curvature: Three Papers on Adaptive Methods in Computational Statistics
(PhD thesis UiS;562, Doctoral thesis, 2020-11)Advanced statistical computations have become increasingly important, as with the increased flexibility of models capturing complex relationships in new data and use-cases, comes increased difficulties of fitting procedures ... -
X-ray Studies on partially decomposed γ- Mg(BH4)2
(Masteroppgave/UIS-TN-IMF/2020;, Master thesis, 2020-07-15)Hydrogen is the energy that fuels the sun and the stars. Having the potential to be zero-carbon during production, when produced by renewable resources, it is an attractive carrier of the pollution-free renewable energy. ... -
Left-Invariant Pseudo-Riemannian Metrics on Lie Groups
(Masteroppgave/UIS-TN-IMF/2020;, Master thesis, 2020)n differential geometry and mathematical physics, there is interest in left-invariant pseudo-Riemannian metrics on Lie groups. We learn and review Lie theory, representation theory, geometric invariant theory, and differential ... -
«Open Middle Math», dybdelæring & positive holdninger i matematikk
(Masteroppgave/UIS-HF-IMF/2020;, Master thesis, 2019-07)Som både lektorstudent og deltidsarbeidene i videregående skole er det mye fokus på hvordan lærere skal forberede seg i møte med fagfornyelsen. Dybdelæring er et sentralt begrep i fagfornyelsen. Motivasjonen for denne ... -
Survival Analysis using Cox Regression on Breast Cancer Data
(Master thesis, 2020-06)In this report, survival data from a german breast cancer study has been analysed using the programming software R. For the 686 female patients participating in the study, the value of eight explanatory variables were ... -
Wick-rotations of pseudo-Riemannian Lie groups
(Peer reviewed; Journal article, 2020)We study Wick-rotations of left-invariant metrics on Lie groups, using results from real GIT (Helleland and Hervik, 2018; Helleland and Hervik, 2019). An invariant for Wick-rotation of Lie groups is given, and we describe ... -
En lærers undervisningsarbeid knyttet til elevers arbeid med kontekstbaserte matematikkoppgaver gjennom dialogbasert undervisning på 6.trinn.
(Masteroppgave/UIS-HF-IGIS/2020;, Master thesis, 2020-06-12)Dialogbasert undervisning har fått en større plass i forskningen på matematikkundervisning de siste årene, noe som også har påvirket utformingen av den nye læreplanen som iverksettes høsten 2020. I dialogbasert undervisning ...