Blar i Department of Mathematics på tittel
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Stable mixed finite elements for linear elasticity with thin inclusions
(Journal article; Peer reviewed, 2021)We consider mechanics of composite materials in which thin inclusions are modeled by lower-dimensional manifolds. By successively applying the dimensional reduction to junctions and intersections within the material, a ... -
Stanley-Reisner ringer med sykliske gruppevirkninger
(Master thesis, 2009-05-29)Oppgaven tar for seg noen spesielle Stanley-Reisner idealer I i polynomringen S med n variable, der mengden av potensvektorene til de minimale generatorene for I er invariant under gruppevirkningen fra gruppen generert av ... -
Statistical analysis of data from the simrad ms70 multibeam sonar
(Master thesis, 2008-07) -
Statistical Approach to Relatedness Analysis in Large Collections of Genetic Profiles. An Application to a DNA-Registry of Fin Whales
(Master thesis, 2012-11-20)The present study utilized data from an Icelandic DNA-registry of fin whales by searching for pairs of relatives with a statistical approach. Three types of relatedness were of interest, half-siblings, parent-offspring and ... -
Statistical approaches for constructing runoff maps - Random forest, linear models and spatial models tested for predictive performance of ungauged catchments in Norway
(Master thesis, 2019-07-09)In this thesis we study statistical approaches to tackle predictions of ungauged catchments in Norway. In collaboration with Norwegian Water Resources and Energy Directorate (NVE) we use observations of runoff, catchment ... -
Statistical Embedding: Beyond Principal Components
(Journal article; Peer reviewed, 2023)There has been an intense recent activity in embedding of very high-dimensional and nonlinear data structures, much of it in the data science and machine learning literature. We survey this activity in four parts. In the ... -
Statistics of weakly nonlinear waves on currents with strong vertical shear
(Journal article; Peer reviewed, 2023)We investigate how the presence of a vertically sheared current affects wave statistics, including the probability of rogue waves, and apply it to a real-world case using measured spectral and shear current data from the ... -
Statistiske metoder for alder-periode-kohort-analyser. En sammenligning av nyere metoder med konvensjonelle generaliserte lineære modeller
(Master thesis, 2013-11-20)Masteroppgaven tar for seg statistiske metoder for alder-periode-kohort-analyser (APC-analyser). For en gitt respons forsøker APC-analyser å separere den påvirkningen som skyldes alder, fra den påvirkningen som er assosiert ... -
Statistiske modellar for alder-periode-kohort-effektar i epidemiologi
(Master thesis, 2011-05-20)Denne oppgåva ser på teorien for alder-periode-kohort-modellar og korleis desse kan implementerast i statistikkprogrammet R. Det er òg sett på korleis splinefunksjonar kan brukast i alder-periode-kohort-modellar og korleis ... -
Statistiske modellar for Poissonregresjon med modifiserte null-sannsyn, ZIP og ZAP
(Master thesis, 2011-05-05)Oppgåva omhandlar modellane zero-inflated og zero- altered Poissonfordeling, vanlegvis forkorta som ZIP og ZAP. Dette er to regresjonsmodellar som bruker Poisson som grunnleggjande fordeling, men som tillet sannsynet for ... -
Statistiske modeller basert på skjulte Markovkjeder i kontinuerlig tid
(Master thesis, 2012-06-01)I denne oppgaven har jeg tatt for meg situasjoner der observasjoner over tid kan tenkes å være generert ved en Markovkjede, og studert innvirkningen av ulike kovariater på intensitetene, med både binære og tidavhengige ... -
Statistiske modelleringer i det europeiske gassmarkedet
(Master thesis, 2015-06-01)I denne oppgaven studerer vi naturgassmarkedet i Europa. Først ser vi på hvilke forhold som påvirker gassprisen. Deretter studerer vi statistisk teori om tidsrekker, volatilitet og copula. Til slutt blir det gjort statistiske ... -
Stellarator - tokamak configurations
(Department of Applied Mathematics report, Research report, 1990-01) -
Still Water Performance Simulation of a SWATH Wind Turbine Service Vessel
(Master thesis, 2012-11-20)In this thesis I am making a computational fluid dynamics(CFD) simulation of a SWATH (Small Waterplane Area Twin Hull) wind turbine service vessel moving in still water at different speeds by using the CFD tool STAR-CCM+. ... -
Stochastic chain-ladder models in nonlife insurance
(Master thesis, 2008)This thesis examines the stochastic models which reproduce chain-ladder estimates used in reserve estimation for nonlife insurance. The chain-ladder method provides no information regarding the variability of the outcome, ... -
Stochastic data assimilation of observations with a detection limit
(Doctoral thesis, 2019-09-16) -
Stochastic organelle genome segregation through Arabidopsis development and reproduction
(Journal article; Peer reviewed, 2024)Organelle DNA (oDNA) in mitochondria and plastids is vital for plant (and eukaryotic) life. Selection against damaged oDNA is mediated in part by segregation – sorting different oDNA types into different cells in the ... -
Stochastic unit-root processes
(Master thesis, 2016-06-01)In practice there are many types of processes that have near unit roots and are very difficult to distinguish from standard unit-root processes, given a finite sample. In our thesis we study a particular class of such ... -
Streamline based History Matching
(Master thesis, 2009-05-07)Streamline based reservoir simulation has been used with great success in the petroleum industry for decades. Fast computational speed together with the fact that sensitivities can be computed analytically along streamlines ... -
A Streamline Front Tracking Method for Two- and Three-Phase Flow Including Capillary Forces
(Contemporary Mathematics; 295, Chapter, 2002)