Browsing Faculty of Mathematics and Natural Sciences by Title
Now showing items 2652-2671 of 9860
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Estimating global radiation at ground level from satellite images
(Doctoral thesis, 2005-06-15) -
Estimating the discretization dependent accuracy of perfusion in coupled capillary flow measurements
(Peer reviewed; Journal article, 2018-07-20)One-compartment models are widely used to quantify hemodynamic parameters such as perfusion, blood volume and mean transit time. These parameters are routinely used for clinical diagnosis and monitoring of disease development ... -
Estimating the fate of oxygen ion outflow from the high-altitude cusp
(Journal article; Peer reviewed, 2020)We have investigated the oxygen escape-to-capture ratio from the high-altitude cusp regions for various geomagnetic activity levels by combining EDI and CODIF measurements from the Cluster spacecraft. Using a magnetic field ... -
Estimating the Rate of Cessation of Magnetospheric Activity in AMPERE Field‐Aligned Currents
(Peer reviewed; Journal article, 2018-12)The decay of magnetospheric activity when driving is turned off (to a minimum) was measured in total field‐aligned current estimates from the Active Magnetosphere and Planetary Electrodynamics Response Experiment (AMPERE) ... -
Estimating the size of undetected cases of the COVID-19 outbreak in Europe: An upper bound estimator
(Journal article; Peer reviewed, 2020)Background While the number of detected COVID-19 infections are widely available, an understanding of the extent of undetected cases is urgently needed for an effective tackling of the pandemic. The aim of this work is ... -
Estimating the undetected infections in the Covid-19 outbreak by harnessing capture-recapture methods
(Journal article; Peer reviewed, 2020)Objectives A major open question, affecting the decisions of policy makers, is the estimation of the true number of Covid-19 infections. Most of them are undetected, because of a large number of asymptomatic cases. We ... -
Estimating the volume of the 1978 Rissa quick clay landslide in Central Norway using historical aerial imagery
(Journal article; Peer reviewed, 2022)Quick clay is found across Scandinavia and is especially prominent in south-eastern and central Norway. Quick clay is prone to failure and can cause landslides with high velocities and large run-outs. The 1978 Rissa landslide ... -
Estimating unreported catches in Norwegian fisheries
(Doctoral thesis, 2022-06-27)A discard ban for fish was introduced in Norway in 1987, which requires that all commercial catches must be landed and reported. In theory, this regulation creates a full record of total removals from all fisheries. However, ... -
Estimation and identifiability of kinetic parameters in dynamical models of biochemical reaction networks
(Doctoral thesis, 2020-02-18)This dissertation is a partial fulfillment of the requirements for the degree Doctor of Philosophy (PhD) at the Department of Mathematics, University of Bergen. The subject of the thesis is estimation of parameters in ... -
Estimation and Verification of Hydrodynamic Parameters of an ROV using CFD
(Master thesis, 2023-05-26)The hydrodynamic added mass and damping of a Remotely Operated Vehicle (ROV) are estimated using Computational Fluid Dynamics (CFD) based on OpenFOAM. The estimated hydrodynamic parameters are verified with recorded data ... -
Estimation of AR parameters in time series with suddenly changing structure
(Statistical report no. 19, Research report, 1988-07) -
Estimation of cold plasma outflow during geomagnetic storms
(Peer reviewed; Journal article, 2015-12-01)Low-energy ions of ionospheric origin constitute a significant contributor to the magnetospheric plasma population. Measuring cold ions is difficult though. Observations have to be done at sufficiently high altitudes and ... -
Estimation of discard of cod (Gadus morhua) in Norwegian gillnet fisheries
(Master thesis, 2019-06-21)Estimates have suggested that around 10 % of global marine fisheries-catches are discarded at sea, instead of landed and utilized. Since 1987, Norway has gradually implemented a Discard ban, which prohibits the act, but ... -
Estimation of discards in the commercial trawl fishery for Northeast Arctic cod (Gadus morhua L.) and some effects on assessment
(Master thesis, 2001)Discarding of small fish has been and still is a large problem in many fisheries. It is a problem because most of the discarded fish die and are a direct loss to the biomass of the stock. When discards occur and it is not ... -
Estimation of elastic moduli of mixed porous clay composites
(Peer reviewed; Journal article, 2011-01-13)We have developed a procedure for estimating the effective elastic properties of various mixtures of smectite and kaolinite over a range of confining pressures, based on the individual effective elastic properties of pure ... -
Estimation of groundwater storage loss for the Indian Ganga Basin using multiple lines of evidence
(Journal article; Peer reviewed, 2023)We used remote sensing data, field observations and numerical groundwater modelling to investigate long-term groundwater storage losses in the regional aquifer of the Ganga Basin in India. This comprised trend analysis for ... -
Estimation of In-situ Polymer Rheology by Simulation of Radial Flow Experiment
(Master thesis, 2017-06-22)Most experiments about in-situ rheology of polymer flow in porous media presented in literature is executed on linear cores and hence, performed during steady state conditions where the pressure drop is constant over the ... -
Estimation of Ocean Biogeochemical Parameters in an Earth System Model Using the Dual One Step Ahead Smoother: A Twin Experiment
(Journal article; Peer reviewed, 2022)Ocean biogeochemical (BGC) models utilise a large number of poorly-constrained global parameters to mimic unresolved processes and reproduce the observed complex spatio-temporal patterns. Large model errors stem primarily ... -
Estimation of Relative Permittivity and Thickness for Dielectric Materials Using an Open-Ended Waveguide Sensor
(Master thesis, 2016-09-10)The main goal of this thesis has been to conduct a feasibility study on an open-ended waveguide sensor as a tool for estimating the relative permittivity and thickness of dielectric layers in the thickness range 0.5-5 cm. ...