Blar i NTNU Open på forfatter "Simonsen, Ingve"
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Hyperbolic Conservation Laws with Relaxation Terms: A Theoretical and Numerical Study
Aursand, Peder Kristian (Master thesis, 2011)Hyperbolic relaxation systems is an active field of research, with a largenumber of applications in physical modeling. Examples include modelsfor traffic flow, kinetic theory and fluid mechanics. This master s thesis is ... -
Improving Accuracy of Computational Light Scattering Simulations by Improved Numerical Integration
Aarnes, Jørgen Røysland (Master thesis, 2014)Numerical integration plays an important role in many large scale physics simulations, yet the accuracy of such computations are often overlooked when the integrator routine is implemented---if the integration result itself ... -
Matlab Based Music Analyses of Piano Recordings: An Attempt to Connect Quantitative Acoustical Parameters to Subjective Performance Intention
Lerstad, Stine Alm (Master thesis, 2014)Timbre is a well known concept in music and denotes adjectives describing a sound or sound sensation. All instruments possess a characteristic timbre making it possible to distinguish one type of instrument from another. ... -
Minimum Ignition Energy in a Hygrogen Combustible Mixture
Jensen, Jens Tarjei (Master thesis, 2011)In this thesis the Minimum Ignition Energy, in a hydrogen-air system, is studied by Direct Numerical Simulations (DNS) in a program called the Pencil Code. The heat source used to achieve ignition is modeled by a Gaussian ... -
Modellering av Termisk Stråling for Bruk i Brannsimuleringer.: En teoretisk analyse og studie av noen aspekter
Marthinsen, Eirik (Master thesis, 2012)Numerisk løsning av termisk varmetransport spiller en viktig rolle i simuleringer av brann og andre systemer med høy temperatur, som er et sentralt anvendelsesområde for multifysikk-programpakken Brilliant som blir utviklet ... -
Nanometer-Resolution Mask Lithography with Matter Waves: Near-Field Binary Holography
Nesse, Torstein; Simonsen, Ingve; Holst, Bodil (Journal article; Peer reviewed, 2019)Mask-based pattern generation is a crucial step in microchip production. The next-generation extreme-ultraviolet- (EUV) lithography instruments with a wavelength of 13.5 nm are currently under development. In principle, ... -
Non-destructive Evaluation of Stress and Fatigue Damage in Welded Carbon Steel Specimens Using Ferrx Electromagnetic Method (FEMM)
Persvik, Øyvind Othar Aunet (Master thesis, 2012) -
Nonlinear Laser-induced Deformations and Forces at Liquid-Liquid Interfaces near the critical Point.
Aanensen, Nina Sasaki (Master thesis, 2011)The theory of laser-induced liquid-liquid interface deformation has been presented and used to derive a differential equation describing the shape of the deformation. The differential equation has been investigated and ... -
Numerical modelling of marine icing on offshore structures and vessels
Hansen, Eirik Schrøder (Master thesis, 2012)A numerical model for predicting icing on offshore structures and vessels has been developed and implemented. The model calculates the icing caused by freezing sea spray, and focuses on two distinct sources of spray - spray ... -
Numerical Modelling of the Optical Properties of Truncated and Coated Prolate Spheroidal Nanoparticles
Stavseng, Sindre Vegard (Master thesis, 2013)The optical properties of an island film of truncated and coated prolate spheroidal particles are studied numerically by implementing support for this island geometry in the GranFilm software. The underlying theory of the ... -
Numerical Simulations of Scattering of Light from Two-Dimensional Rough Surfaces Using the Reduced Rayleigh Equation
Simonsen, Ingve; Nordam, Tor; Letnes, Paul Anton (Journal article; Peer reviewed, 2013)A formalism is introduced for the non-perturbative, purely numerical, solution of the reduced Rayleigh equation (RRE) for the scattering of light from two-dimensional penetrable rough surfaces. Implementation and performance ... -
Numerical studies of the scattering of light from a two-dimensional randomly rough interface between two dielectric media
Hetland, Øyvind Storesund; Maradudin, Alexei A.; Nordam, Tor; Simonsen, Ingve (Journal article; Peer reviewed, 2016)The scattering of polarized light incident from one dielectric medium on its two-dimensional randomly rough interface with a second dielectric medium is studied. A reduced Rayleigh equation for the scattering amplitudes ... -
Numerical studies of the transmission of light through a two-dimensional randomly rough interface
Hetland, Øyvind Storesund; Maradudin, Alexei A.; Nordam, Tor; Letnes, Paul Anton; Simonsen, Ingve (Journal article; Peer reviewed, 2017)The transmission of polarized light through a two-dimensional randomly rough interface between two dielectric media has been much less studied, by any approach, than the reflection of light from such an interface. We have ... -
Observation of the boson peak in a two-dimensional material
Tømterud, Martin; Eder, Sabrina Daniela; Büchner, Christin; Wondraczek, Lothar; Simonsen, Ingve; Schirmacher, Walter; Manson, Joseph R.; Holst, Bodil (Peer reviewed; Journal article, 2023)The boson peak is an excess in the phonon vibrational density of states relative to the Debye model. It has been observed in a wide range of amorphous materials, from inorganic glasses to polymers. Two-dimensional random ... -
On the Simulation of Electromagnetic Wave Scattering by Periodic and Randomly Rough Layered Structures based on the Reduced Rayleigh Equations: Theory, numerical analysis and applications
Banon, Jean-Philippe (Doctoral theses;2018:306, Doctoral thesis, 2018)A great number of natural phenomena that we observe, as well as numerous man-made objects we use in our everyday life, are made possible thanks to the interaction between light and matter. In particular, when light is ... -
An Optical Modeling Framework for Coronavirus Detection Using Graphene-Based Nanosensor
Maghoul, Amir; Simonsen, Ingve; Rostami, Ali; Mirtaheri, Peyman (Peer reviewed; Journal article, 2022)The outbreak of the COVID-19 virus has faced the world with a new and dangerous challenge due to its contagious nature. Hence, developing sensory technologies to detect the coronavirus rapidly can provide a favorable ... -
Optical Properties of truncated and coated spheroidal Nanoparticles on a Substrate
Aursand, Eskil (Master thesis, 2012)In nanoparticle research it is common to perform optical measurements on particle films during deposition, to help understand the growth process. GranFilm is a software under development which can calculate the optical ... -
Optimising ultrasonic beamforming through solid plates
Åvitsland, Ørjan (Master thesis, 2021)Ultrasoniske verktøy gir en ikke-destruktiv måte å teste integriteten av borehull og sementen som ligger rundt røret. Dagens verktøy tar ikke i bruk dynamisk fokusering, og visse begrensninger på grunn av dette. Å fokusere ... -
Perfect depolarization in single scattering of light from uncorrelated surface and volume disorder
Banon, Jean-Philippe Armand; Simonsen, Ingve; Carminati, Remi (Journal article, 2020)-polarized waves from uncorrelated surface and volume disorder can lead to perfect depolarization. The degree of polarization vanishes in specific scattering directions that can be characterized based on simple geometric ... -
Phase perturbative calculations of diffuse light scattering on randomly rough surfaces in and out of plane
Åmdal, Svein (Master thesis, 2021)Ved en eller annen lendgdeskala viser alle overflater en grad av ruhet, og det er viktig å forstå de fysiske konsekvensene av det. Denne oppgaven handler om refleksjon av elekromagnetiske bølger i det optiske bølgelengderegimet ...