Recent additions

  • Analyse av energibruk og teknisk drift ved Bryne videregående skole 

    Tjøtta, Louise Mitchell (Master thesis; Mastergradsoppgave, 2019-12-15)
    Tidligere Bryne videregående skole (vgs.) og Time vgs. ble i 2015 slått sammen til nye Bryne vgs. I den anledning ble det bygget tre nye skolebygg med et moderne og komplekst energisystem. Skolen er et pilotprosjekt i tråd med Rogaland fylkeskommune sin miljøpolitikk og er bygget med fokus på bærekraftige prinsipper, lavt energiforbruk og bruk av energikilder med begrenset CO2 utslipp. Skolens varme ...
  • Wind resource assessment using weather research and forecasting model. A case study of the wind resources at Havøygavlen wind farm 

    Fossem, Anders Aarhuus (Master thesis; Mastergradsoppgave, 2019-12-13)
    The need for energy increases globally due to rapid expansion of population and prosperity. To meet this demand while decreasing carbon emission and eventually transition out fossil fuel, efficient utilization of wind power is prominent. This study evaluates the performance of the Weather Research and Forecast model (WRF) with respect to wind speed and wind direction. The area of the study is ...
  • Short-term wind power prediction models in complex terrain based on statistical time series analysis 

    Fossem, Andreas Aarhuus (Master thesis; Mastergradsoppgave, 2019-12-13)
    One of the largest challenges with the utilization of wind as a renewable resource, is its natural variability and intermittent nature. To achieve a sustainable integration of wind power into the power grid, a precise and reliable prediction method is therefore required. In this study, several short-term wind power prediction models based on statistical time series analysis were developed and tested, ...
  • Decentralized wind power as part of the relief for an overstrained grid. A case study on Northern Senja, Norway 

    Bednorz, Paul (Master thesis; Mastergradsoppgave, 2019-08-12)
    The most significant factor in wind turbine siting is the wind conditions. Those often determine the economic and ecologic success of a project. Especially in topographically complex areas micro siting can be difficult and costly. Small and medium scale projects often lack the knowledge and resources for an extended in situ assessment. A combination of modelled wind data and the use of a geographic ...
  • Estimation of power supply by renewable energy sources to a weather station at Nordlysobservatoriet, Alta 

    Rannekleiv, Lars Marius (Master thesis; Mastergradsoppgave, 2019-08-05)
    For a weather station that will be set up at Halddetoppen, Alta, there will also be installed a hybrid renewable energy system, to supply the station with power. This thesis simulated and estimated the hybrid system as it was planned, to see if it would be enough to give steady supply for the weather station. Different set-ups for the hybrid system was investigated. The set-ups differed in mounting ...
  • Investigation of Photovoltaic Energy Yield on Tromsøya by Mapping Solar Potential in ArcGIS 

    Eikeland, Odin Foldvik (Master thesis; Mastergradsoppgave, 2019-06-13)
    To contribute to the reduction of greenhouse gas emissions, energy production from renewable energy resources should be markedly increased to supply the rising global energy demand (Marchant, 2018). This thesis investigates the solar energy potential in Tromsø which is used as a basis for estimating total energy yield from photovoltaic (PV) systems on rooftops. The energy yield is compared against ...
  • Isdynamikk i tre mindre fjord-trausystemer langs Finnmarkskysten 

    Skjeldnes, Marie Elise Planting (Master thesis; Mastergradsoppgave, 2019-07-01)
    Multistråle batymetriske data og seismiske profiler fra den vestlige kysten av Finnmark er analysert med formålet om å rekonstruere dynamikken til det Fennoskandiske Isdekket gjennom siste glasiale maksimum, og påfølgende deglasiasjon. Fokuset har vært på tre prograderende kiler i forlengelsen av de glasiale trauene Rolvsøy-, Hjelmsøy- og Måsøytrauet. En seismisk stratigrafi er definert med tre ...
  • Distributed Renewable Generation and Power Flow Control to Improve Power Quality at Northern Senja, Norway 

    Jacobsen, Tobias Thørnquist (Master thesis; Mastergradsoppgave, 2019-06-01)
    Distributed renewable generation and power flow control are promising tech- nologies for increasing power system efficiency. Renewable energy production close to consumption reduces need for transport of power to these locations. The benefits of reactive flow control are well documented, and in recent years the use of energy storage for active power control has increased in relevance. The power ...
  • Role of hafnium doping concentration on the structural and surface properties of ZnO surfaces 

    Moser, Toni (Master thesis; Mastergradsoppgave, 2019-05-31)
    The presented thesis deals with the characterisation of hafnium doped zinc oxides with focus on the application as transparent conducting film (TCF) or electron transport layer (ETL) in heterojunction solar cells. Atomic force microscopy (AFM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), electrical and optical methods have been applied to characterise the examined ...
  • Ice-water Classification in the Barents Sea from Sentinel-1 EW SLC Images 

    Krokan, August (Master thesis; Mastergradsoppgave, 2019-05-31)
    The focus of this thesis is to do ice-water classification on Sentinel-1 EW SLC imagery using an unsupervised Mixture of Gaussian segmentation algorithm. The classes are automatically labelled as sea ice or water based on the slope of the observed brightness decay from near- to far-range, which is different for sea ice and water. The aim of the thesis is twofold. In the first part, the ability of ...
  • On the relationship between global mean temperature in historical runs of Earth system models and equilibrium climate sensitivity 

    Haug, Sofie Flyvholm (Master thesis; Mastergradsoppgave, 2019-05-31)
    Equilibrium climate sensitivity (ECS) measures the long-term global surface temperature response due to a doubling of CO2 in the atmosphere. Estimates of ECS is not well constrained, 1.5-4.5C [Pachauri et al., 2014], and there is a wide spread between different Earth system models (ESMs). Recently it has been suggested that ECS can be constrained using an observed relationship between the statistical ...
  • Target Decomposition of Quad-Polarimetric SAR Images as an Unmixing Problem 

    Norum Danielsen, Daniel (Master thesis; Mastergradsoppgave, 2019-05-31)
    Classic target decomposition methods use scattering space in their approaches. However, the goal for this project is to investigate whether a different approach to retrieve accurate and reliable estimates on the earth composition is possible when using the feature space with covariance matrix-based features. The approach consists of four steps. Generating multidimensional feature space data from ...
  • Forbedret tilstandsovervåkning av bærelager i Sjona kraftverk ved digitalisering 

    Fagerli, Kristin (Master thesis; Mastergradsoppgave, 2019-06-01)
    Økt konkurranse fra andre fornybare energikilder, økt energibehov og økt behov for reguleringsevne stiller stadig større krav til eksisterende og nye vannkraftverk. Vannkraftsektoren har de siste hundre årene ikke opplevd reell konkurranse fra andre teknologier her til lands, og har derfor ikke blitt tvunget til innovasjon og nytenking i samme grad som andre deler av kraftnæringen. De siste årene ...
  • Remote Sensing of Coastal Waters 

    Nesse, Sandra Susann Solheim (Master thesis; Mastergradsoppgave, 2019-03-01)
    The coastal areas outside Lofoten, Vesterålen and Senja, in the northern Norwegian coast, are known for their incredible nature, majestic mountains and unique fishing communities. This coastal area is known for high marine productivity and an important marine environment, being the home for valuable fish stocks including pollock, haddock, herring and cod. To study the characteristics of coastal ...
  • Evaluation of Speckle Variance, Higher Moments and Their Dependence on Incidence Angle. 

    Hallaråker, Jon Anders Vethe (Master thesis; Mastergradsoppgave, 2018-12-14)
    This thesis investigates speckle properties from Sentinel-1 GRDM data to explore its dependency of incidence angle. The data is processed using the SNAP-tool such that a uniform region can be selected and estimation of speckle variance, skewness and kurtosis can be carried out. These speckle properties are calculated over ocean and sea ice for comparison and modeled to fit a regression line. Hypothesis ...
  • On Atmospheric Energy Transport by Waves 

    Heiskanen, Tuomas Ilkka Henrikki (Master thesis; Mastergradsoppgave, 2018-12-14)
    Recently a new method, based on a Fourier decomposition in the zonal direction, for studying the atmospheric energy transport contribution by planetary and cyclone scale waves has been proposed. Recent studies based on this show that planetary waves contribute more than cyclone scale waves to the atmospheric energy transport into the Arctic. The planetary waves contribute to the Arctic amplification ...
  • An integrated seismic and well data study of shallow fluid accumulations in Snøhvit, SW Barents Sea 

    Arntzen, Andreas (Master thesis; Mastergradsoppgave, 2018-07-12)
    In the vicinity of the Snøhvit hydrocarbon reservoir in the Hammerfest Basin a number of fluid flow phenomena occur, e.g. free gas accumulations, pockmarks and potential indicators of gas hydrates.The presence of shallow gas may cause major blowouts during drilling. To reduce the risk, it is important to locate the shallow gas and gas hydrates. CO2 has been injected into the Snøhvit reservoir since ...
  • Iceberg Drift-Trajectory Modelling and Probability Distributions of the Predictions 

    Baadshaug, Ole (Master thesis; Mastergradsoppgave, 2018-06-29)
    Moving icebergs represent a major problem for shipping, as well as for oil and gas installations in ice infested waters. To be able to take actions against hazardous icebergs, it is necessary to develop models for prediction of iceberg drift trajectories. Many models have been developed in order to do so, using different approaches. These approaches can be divided into two main categories, dynamic ...
  • Forest Health Monitoring by Detection of Biotic Agents in Satellite Images 

    Hansen, Stine (Master thesis; Mastergradsoppgave, 2018-06-01)
    Since 1999, the Pine Wood Nematode (PWN) has spread, infected and damaged growing areas of pine forest in Portugal. The pest is subject to strict quarantine measures, that require forest owners to register, fell and dispose of infected trees. As remote sensing from satellites provides repetitive and consistent data sets with high temporal resolution and large spatial coverage, a surveillance based ...
  • On the Feasibility of Using Twitter Data to Assess the Global Circulation Patterns of Influenza Viruses 

    Holmstrand, Inga Setså (Master thesis; Mastergradsoppgave, 2018-06-01)
    Having the flu is something that everyone is familiar with, and the influenza season hits every year. The intensity and timing vary from year to year driven by climatic conditions and antigenic evolution, through mechanisms that are only partially understood. Most research agree that the virus originates in East and South-East (E-SE) Asia and spread throughout the world through human movement. In ...

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