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Preon Models in Particle Physics
(Master thesis, 2014)We summarize the standard model and grand unified theories in light of group theoretical properties. We discuss selected classic and modern preon models. Finally, a schematic preon model for all three generations of ... -
Presence of negative entropies in Casimir interactions
(Journal article; Peer reviewed, 2016)Negative entropy in connection with the Casimir effect at uniform temperature is a phenomenon rooted in the circumstance that one is describing a nonclosed system, or only part of a closed system. In this paper we show ... -
Pressure Fluctuations and Correlations in Steady State two Phase Flow in Porous Media
(Master thesis, 2013)This thesis investigates the burst size distribution and pressurecorrelation profiles of steady state two phase flow in porous mediaat various capillary numbers and viscosity ratios. A network modelis used to simulate ... -
Pressure Fluctuations in Steady State Two-Phase Flow in Porous Media
(Master thesis, 2013)Several aspects of two-phase flow in porous are examined numerically.The burst size distributions in both the invasion phase and steady stateare computed; above a threshold, the steady state distribution is found tobe ... -
Pressure-induced 0-π transitions and supercurrent crossover in antiferromagnetic weak links
(Journal article, 2013)We compute self-consistently the Josephson current in a superconductor-antiferromagnet-superconductor junction using a lattice model, focusing on 0−π transitions occurring when the width of the antiferromagnetic region ... -
Pricing Put Options using Heston's Stochastic Volatility Model
(Master thesis, 2013)The Heston model is a partial differential equation which is used to price options and is a further developed version of the more famous Black-Scholes equation. Heston considers stochastic volatility which results in an ... -
Primary Porcine Brain Endothelial Cells as In Vitro Model to Study Effects of Ultrasound and Microbubbles on Blood-Brain Barrier Function
(Journal article; Peer reviewed, 2017)Focused ultrasound in the presence of microbubbles transiently and reversibly opens the blood-brain barrier (BBB) in rodents and humans thereby providing a time window for increased drug delivery into brain tissue. To get ... -
Principles, advances and applications of ultrafast mid-infrared lasers
(Chapter, 2009)The talk reviews principles and advances in generation and applications of ultrashort pulses and frequency combs directly from the solid-state oscillator based on Cr2+ZnSe laser, and highlights radical efficiency and ... -
Probing dark matter with astroparticles
(Doctoral theses at NTNU;2023:240, Doctoral thesis, 2023)There is an enormous amount of evidence for the existence of dark matter, from scales ranging from the faintest dwarf galaxies to the Universe as a whole. However, its nature remains a mystery. This thesis is a part of the ... -
Probing defects in Al-Mg-Si alloys using muon spin relaxation
(Journal article; Peer reviewed, 2012)Muon spin methods are very sensitive to nanoscale defects such as trace elements and vacancies in metals. This sensitivity is required when investigating Al-Mg-Si alloys, a complicated system in which diffusion-controlled ... -
Probing Gravity Waves in the Middle Atmosphere Using Infrasound From Explosions
(Peer reviewed; Journal article, 2023)This study uses low-frequency, inaudible acoustic waves (infrasound) to probe wind and temperature fluctuations associated with breaking gravity waves (GWs) in the middle atmosphere. Building on an approach introduced by ... -
Probing Majorana localization in minimal Kitaev chains through a quantum dot
(Peer reviewed; Journal article, 2023)Artificial Kitaev chains, formed by quantum dots coupled via superconductors, have emerged as a promising platform for realizing Majorana bound states. Even a minimal Kitaev chain (a quantum dot–superconductor–quantum dot ... -
Probing phase separation in Bose-Fermi mixtures by the critical superfluid velocity
(Journal article; Peer reviewed, 2010)We investigate the effect exerted by spin-polarized fermions on the interaction between superfluid bosons for a Bose-Fermi mixture residing on an optical lattice, with particular emphasis on the possibility of an induced ... -
Probing the Atomic Arrangement of Subsurface Dopants in a Silicon Quantum Device Platform
(Peer reviewed; Journal article, 2023)High-density structures of subsurface phosphorus dopants in silicon continue to garner interest as a silicon-based quantum computer platform; however, a much-needed confirmation of their dopant arrangement has been lacking. ... -
Probing the Atomic Arrangement of Subsurface Dopants in a Silicon Quantum Device Platform
(Peer reviewed; Journal article, 2023)High-density structures of subsurface phosphorus dopants in silicon continue to garner interest as a silicon-based quantum computer platform; however, a much-needed confirmation of their dopant arrangement has been lacking. ... -
Processing and indexing of electron backscatter patterns using open-source software
(Peer reviewed; Journal article, 2020)A new method to increase the signal-to-noise ratio S/N of electron backscatter patterns (EBSPs) based upon principal component analysis (PCA) is presented. The PCA denoising method is applied to ten scans of EBSPs from the ... -
PROCESSING AND PROPERTY ENGINEERING OF DOMAINS AND DOMAIN WALLS IN HEXAGONAL MANGANITES
(Master thesis, 2022)Topologisk beskyttede objekter har vakt oppmerksomhet innen mange forskningsom- råder. Fra kvantebiter til skyrmioner, fra superflytende helium til det tidlige universet, topologi spiller en avgjørende rolle. Det er ikke ... -
Producing tubes of a droplet in an emulsion with surface particles at the interface
(Master thesis, 2014)The aim of the work done in connection to this thesis was to find different methods with which long tubes of one liquid suspended in another can be made (an emulsion). Various liquids (silicone oil, castor oil, diethyl-phtalate, ... -
Production and Application of Micronsized Polysaccharide Particles - Studying Perturbation of a Model Mucus Barrier with Total Internal Reflection Fluorescence (TIRF) Microscopy and Atomic Force Microscopy (AFM) Indentation
(Master thesis, 2011)The overall aim of this project was to produce homogeneously sized polysaccharide microparticles and apply these and similar sized particles as probes for investigation of mucin layers as a model for a biological barrier. ... -
Professional practice changes in radiotherapy physics during the COVID-19 pandemic
(Peer reviewed; Journal article, 2021)Background and purpose The COVID-19 pandemic has imposed changes in radiotherapy (RT) departments worldwide. Medical physicists (MPs) are key healthcare professionals in maintaining safe and effective RT. This study ...