Browsing Institutt for matematiske fag by Title
Now showing items 1091-1110 of 2376
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Isogeometric analysis of THM coupled processes in ground freezing
(Journal article; Peer reviewed, 2017)An isogeometric analysis (IGA) based numerical model is presented for simulation of thermo-hydro-mechanically (THM) coupled processes in ground freezing. The momentum, mass and energy conservation equations are derived ... -
Isogeometric Analysis Using Locally Refined B-splines
(Doctoral thesis at NTNU;2014:376, Doctoral thesis, 2014) -
Isogeometric analysis using LR B-splines
(Journal article; Peer reviewed, 2014)The recently proposed locally refined B-splines, denoted LR B-splines, by Dokken et al. (2013) [6] may have the potential to be a framework for isogeometric analysis to enable future interoperable computer aided design and ... -
Isogeometric Analysis: Higher-Order Differential Equations
(Master thesis, 2013)This thesis introduces Isogeometric Analysis as a potentional bridge between the Finite Element Analysis (FEA) and Computer Aided Design (CAD) communities. An introduction to B-splines and B-spline-based Isogeometric ... -
Isogeometric boundary element method for acoustic scattering by a submarine
(Journal article; Peer reviewed, 2019)Isogeometric analysis with the boundary element method (IGABEM) has recently gained interest. In this paper, the approximability of IGABEM on 3D acoustic scattering problems will be investigated and a new improved BeTSSi ... -
Isogeometric Collocation - Numerical solution of differential equations
(Master thesis, 2016)This thesis present the theory and implementation of Lagrange polynomial interpolation. We study and implement Splines intended on geometric design and interpolation methods. We explore and implement one dimensional numerical ... -
Isogeometric divergence-conforming variational multiscale formulation of incompressible turbulent flows
(Journal article, 2016)A new residual-based variational multiscale (RBVMS) formulation for incompressible turbulent flows is proposed that is suitable for discretization using divergence-conforming B-splines. The proposed methodology results in ... -
Isogeometric Finite Element Analysis using B-spline Basis Functions: The Poisson Equation and the Biharmonic Equation
(Master thesis, 2013)In this thesis the finite element method with B-spline basis functions was implemented and tested for the Poisson equation and the Biharmonic equation in an isoparametric setting. The equations were solved on a unit square ... -
Isogeometric methods for CFD and FSI-simulation of flow around turbine blades
(Journal article; Peer reviewed, 2015)Coupled fluid-structure interaction simulations of wind turbines have traditionally been considered computationally too expensive to carry out. However, more powerful computers and better solution techniques based on ... -
Isogeometric Methods for Computational Fluid Dynamics: Divergence-conforming Discretizations for the 2D Stokes Equations
(Master thesis, 2014)In this thesis we look at how boundary value problems for partial differential equations can be solved numerically using B-splines, or more generally NURBS, both to express the geometry of the problem exactly and as a basis ... -
Isogeometrisk analyse av Boussinesq ligningene
(Master thesis, 2016)In this master thesis, I have solved the Boussinesq equations with Isogeometric Analysis to study heat transfer coupled with air circulation. The Boussinesq equations consist of the Navier-Stokes equations and the ... -
Isomorphisms of Lᵖ-operator algebras arising from projective group and groupoid representations
(Master thesis, 2022)I denne avhandlingen ser vi hovedsakelig på isomorfiproblemet for den reduserte vridde gruppe- og gruppoide-Lᵖ-operatoralgebraen. For en lokalkompakt gruppe G og en kontinuerlig 2-kosykel σ definerer vi den reduserte ... -
Iteration of composition operators on small Bergman spaces of Dirichlet series
(Journal article; Peer reviewed, 2018)The Hilbert spaces Hw consisiting of Dirichlet series F(s) = P∞ n=1 an n −s that satisfty P∞ n=1 |an| 2 /wn < ∞, with {wn}n of average order logj n (the j-fold logarithm of n), can be embedded into certain small Bergman ... -
"Jeg forstår mer av hvordan man regner ut i Pytagoras da, for trigonometri er jo bare en tast på kalkulatoren" - En studie om bruk av matematikk på utdanningsprogrammet Bygg- og anleggsteknikk
(Master thesis, 2016)Denne casestudien handler om matematikk i programfaget Produksjon for det yrkesfaglige utdanningsprogrammet Bygg- og anleggsteknikk. Studiens forskningsspørsmål er følgende: Hvilke matematiske ressurser kan observeres i ... -
«Jeg skjønner hva han gjør, men ikke hvordan han kommer på å gjøre det» - En casestudie av R1-elevers forståelse av bevis
(Master thesis, 2015)Denne casestudien handler om bevisforståelse hos VG2-elever som har faget matematikk R1. Det overordnede forskningsspørsmålet for studien er: Hvilke bevisskjemaer benytter R1-elever seg av når de beviser? Studien har også ... -
«Jeg syns avstanden mellom boka og eksamen er litt stor egentlig»: En studie av R2-elevers forhold til læreboka i matematikk
(Master thesis, 2012)Målet med denne undersøkelsen er å undersøke av R2-elevers forhold til læreboka si i matematikk. Jeg jobbet med å besvare spørsmålene «Hvordan bruker R2-elever læreboka i matematikk?», «Hvilke deler av boka vurderer elevene ... -
A joint Bayesian framework for missing data and measurement error using integrated nested Laplace approximations
(Peer reviewed; Journal article, 2023)Measurement error (ME) and missing values in covariates are often unavoidable in disciplines that deal with data, and both problems have separately received considerable attention during the past decades. However, while ... -
Joint spatio-temporal modelling of brain cancer incidence and mortality in Norway
(Master thesis, 2020)I denne oppgaven modelleres bade insidens og dødelighet for hjernekreft i Norge over de siste 50 årene. Dette er gjort for å prøve å oppdage underliggende geografiske- og tidsmessige trender hos sykdommen. Insidens- og ... -
Jordan-Hölder property for representations of quivers over exact categories
(Master thesis, 2023)Vi vil se på hva en eksakt kategori er, og vise noen resultater som gjelder generelt for eksakte kategorier. Etterpå vil vi ettablere hva Jordan-Hülder egenskap(JHP) for eksakte kategorier er, og se på noen eksakte kategorier ... -
Journal of the Royal Statistical Society: Series C (Applied Statistics) Journal of the Royal Statistical Society: Series C (Applied Statistics) ORIGINAL ARTICLE Open Access A two-field geostatistical model combining point and areal observations—A case study of annual runoff predictions in the Voss area
(Peer reviewed; Journal article, 2021)We estimate annual runoff by using a Bayesian geostatistical model for interpolation of hydrological data of different spatial support: streamflow observations from catchments (areal data), and precipitation and evaporation ...