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A phase-field model for fracture of unidirectional fiber-reinforced polymer matrix composites
(Peer reviewed; Journal article, 2020)This study presents a crack phase-field approach for anisotropic continua to model, in particular, fracture of fiber-reinforced matrix composites. Starting with the variational formulation of the multi-field problem of ... -
Phase-Field Modelling of Precipitation Mechanisms in Al-Mg-Si Alloys
(Master thesis, 2022)Denne masteravhandlingen studerer utfellingsprosessen av β′′ utfellinger under kunstig eldning av aluminiumslegeringer i 6xxx-serien ved å benytte seg av fase-felt metoden. I løpet av de siste to tiårene har det blitt ... -
Phase-Field Models for Two-Phase Flows Using the Least-Squares Method
(Doctoral theses at NTNU;2017:299, Doctoral thesis, 2017)The correct representation of the interface dynamics in two–phase flows plays an important role in the understanding of multiphase flow phenomena. There are many numerical methods available to describe the interface dynamics, ... -
Phase-field simulation of ductile fracture in shell structures
(Peer reviewed; Journal article, 2021)In this paper, a computational framework for simulating ductile fracture in multipatch shell structures is presented. A ductile fracture phase-field model at finite strains is combined with an isogeometric Kirchhoff-Love ... -
A phase-time-path-difference approach for online wave direction and wave number estimation from measured ship motions in zero and forward speed using a single inertial measurement unit
(Peer reviewed; Journal article, 2023)This study investigates the potential capability of a relatively new and unexplored signal-based approach for shipboard wave estimation. The approach uses the phase-time-path-differences (PTPDs) from an array of shipboard ... -
Phase-Tracking Robust-Synchronization-Loop for Grid-Connected Converters
(Peer reviewed; Journal article, 2021)This paper presents a novel phase-tracking robust-synchronization-loop (RSL) to track the phase and frequency of the grid voltage. A detailed analytical model of the proposed RSL algorithm is presented. Further, a state-space ... -
Phase-type inference on competing risks models with covariates, using MCMC methods
(Master thesis, 2014)The aim with this Master's thesis has been to develop a method of fitting a Phase-type model to a competing risks data set with covariates, and to approximate an underlying model such that important functionals and quantities ... -
Phase-type modeller for konkurrerende risikoer - Tilpasning til datasett og identifiserbarhet av modellene
(Master thesis, 2015)Phase-type modeller for konkurrerende risikodata blir tilpasset to datasett. Begge datasettene omhandler pasienter innlagt på en intensivavdeling, og deres tid til de konkurrerende risikoene død eller utskrivelse. Det ... -
Phase-Type Models and Their Extension to Competing Risks
(Chapter, 2018)We present an extension of the phase-type methodology for modeling of lifetime distributions to include the case of competing risks. This is done by considering finite state Markov chains in continuous time with more than ... -
Phase-type models for competing risks, with emphasis on identifiability issues
(Peer reviewed; Journal article, 2022)We first review some main results for phase-type distributions, including a discussion of Coxian distributions and their canonical representations. We then consider the extension of phase-type modeling to cover competing ... -
Phase-type models involving restarting and instantaneous transitions, with applications to degradation and maintenance
(Peer reviewed; Journal article, 2023)A phase-type distribution is the distribution of time to absorption for an absorbing continuous-time finite state Markov chain. The paper first reviews the extension of the phase-type setting to modeling of competing risks ... -
Phased Array for UHF satellite ground station - Raising Efficiency and Lowering Costs through Heterodyne Steering
(Master thesis, 2024)Existing high gain antennas for the communication with orbiting satellites are often large to reach sufficient gain and require mechanical two-dimensional steering to be dynamically pointed at passing satellites (or other ... -
Phased Array Radio Navigation System on UAVs: GNSS-based Calibration in the Field
(Peer reviewed; Journal article, 2021)With global coverage, high accuracy, and lightweight receivers, global navigation satellite system (GNSS) has been the major positioning solution for unmanned aerial vehicles (UAV). However, GNSS is prone to electromagnetic ... -
Phased Array Radio Navigation System on UAVs: In-flight Calibration
(Peer reviewed; Journal article, 2022)Global Navigation Satellite Systems (GNSS) has been the primary positioning solution for Unmanned Aerial Vehicles (UAVs) due to their worldwide coverage, high precision and lightweight receivers. However, GNSS is prone to ... -
Phased Array Radio Navigation System on UAVs: Real-Time Implementation of In-flight Calibration
(Peer reviewed; Journal article, 2023)Unmanned aerial vehicles (UAV) require an alternative positioning system to the global navigation satellite systems (GNSS) for safety-critical operations since GNSS is prone to unintentional or malicious electromagnetic ... -
Phased array radio system aided inertial navigation for unmanned aerial vehicles
(Journal article; Peer reviewed, 2018)Two of the major challenges with beyond visual line of sight (BVLOS) operations for unmanned aerial vehicles (UAVs) today are navigation and communication. This paper presents a solution that takes on both problems ... -
Phased-based Ranging for Navigation
(Master thesis, 2023)Det Globale Satelittnavigasjonsssystemet (GSNS) er sårbart for både bevisst og utilsiktet forstyrrelse på grunn av den svake signalstyrken. I kritiske scenarier blir det derfor nødvendig med en alternativ måte å finne ... -
Phases and condensates in zero-temperature QCD at finite μI and μS
(Peer reviewed; Journal article, 2022)I discuss pion and kaon condensation and the the properties of the phases of QCD at finite isospin chemical potential μI and strangeness chemical potential μS at zero temperature using three-flavor chiral perturbation ... -
Phases and Zones in the Silicon Process
(Master thesis, 2016)Different zones and materials formed during the production of silicon in a silicon furnace has been examined in this thesis. Samples from two industrial scale silicon furnaces have been have been studied. The excavations ... -
Phases of intensive design and build workshops in architectural education
(Chapter, 2016)ABSTRACT: Design and build pedagogic approach in architectural education allows for a an intensive workshop variety that according to students offers great perceived learning value in a short time. This paper discusses how ...