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norskFakultet for naturvitenskap og teknologi
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An investigation of the robustness of distance measure-based supervised labelling of segmented remote sensing images
(Master thesis; Mastergradsoppgave, 2019-06-03)Unsupervised clustering methods on remote sensing images have shown good results. However, this type of machine learning needs additional labelling to be an end-to-end classification in the same manner as traditional supervised classification. The automation of the labelling needs further exploration. We want to investigate the robustness of a supervised automatic labelling scheme by comparing a ... -
On the relationship between global mean temperature in historical runs of Earth system models and equilibrium climate sensitivity
(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
(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 ... -
Arctic Thin Sea Ice Thickness Regression Models for Sentinel-2
(Master thesis; Mastergradsoppgave, 2019-05-31)Sea ice thickness is an important parameter for modelling the sea ice mass balance, momentum and gas exchanges, and global energy budget. The interest of studies into thin sea ice has increased as trends in recent years show a increasing abundance in thin first year ice. Existing thin sea ice thickness products operate at resolutions down to 750 meters. Very high resolution (less than 100 meters) ... -
Postglacial relative sea level change and glacier activity in the early and late Holocene: Wahlenbergfjorden, Nordaustlandet, Svalbard
(Journal article; Peer reviewed, 2019-05-01)Sediment cores from Kløverbladvatna, a threshold lake in Wahlenbergfjorden, Nordaustlandet, Svalbard were used to reconstruct Holocene glacier fluctuations. Meltwater from Etonbreen spills over a threshold to the lake, only when the glacier is significantly larger than at present. Lithological logging, loss-on-ignition, ITRAX scanning and radiocarbon dating of the cores show that Kløverbladvatna ... -
RoadAhead - Removing Uncertainty in Travel. Creating a Data Warehouse for Green Transportation Nudging
(Master thesis; Mastergradsoppgave, 2019-06-22)This paper describes a data warehouse approach to environmentally friendly transportation nudging. Transportation makes up a significant part of global carbon emissions. These emissions impacts both the climate and the health of individuals. As such, efforts should be done to address transportation patterns and habits. In addition to the reduction of air pollution, making people more active ... -
6-meter wavelength polarimetric inverse synthetic aperture radar mapping of the Moon
(Master thesis; Mastergradsoppgave, 2019-06-01)Remote sensing of planetary surfaces is an effective method for gaining knowledge of the processes that shape the planetary bodies in our solar system. This is useful for uncovering the environment of the primordial solar system and to study the current state of the upper crusts of the other planets in our neighborhood. A recent 6-meter wavelength polarimetric radar map of the Moon showed unexpectedly ... -
Limelight: Real-Time Detection of Pump-and-Dump Events on Cryptocurrency Exchanges Using Deep Learning
(Master thesis; Mastergradsoppgave, 2019-06-01)Following the birth of cryptocurrencies back in 2008, internet investment platforms called exchanges were created to constellate these cryptocurrencies. Allowing investors to sell and buy assets equitable and agile over a single interface. Exchanges now have become popular and carry out over 99% of all daily transactions, totaling hundreds of millions of dollars. Despite that exchanges handling ... -
Studenten som bartender? Argumentasjon i et åpent forsøk i fysikk
(Master thesis; Mastergradsoppgave, 2019-06-01)Denne masteroppgaven tar for seg praktisk arbeid i fysikk i form av en åpen øvelse på universitetsnivå, hvordan øvelsen legger til rette for kreativitet og planlegging av egne metoder. Forskningen på utforskende arbeid, derunder åpne øvelser, er delt. Oppgaven tar hensyn til kritikken og presenterer områder hvor åpne øvelser kan bidra til utvikling av kreativitet og kompetanse i utforskende arbeid. I ... -
Coded Signals for High Frequency Ultrasound Imaging
(Master thesis; Mastergradsoppgave, 2019-05-30)Degeneration of articular cartilage is known as a serious and painful knee disease seriously affecting people in all ages. The disease also marks the presence of osteoarthritis which is a complex musculoskeletal disorder. A successful assessment of the degeneration status is of great importance for estimating osteoarthritis progression, and thereby beneficial for implementing clinical treatments. ... -
Identifying the Controlling Factors on Variable Glacial Modification of Bedrock Dominated Areas in Kongsfjorden, Svalbard
(Master thesis; Mastergradsoppgave, 2018-07-05)This thesis aims to better understand the variability of glacial erosion along glacial troughs located in high latitude settings, through a case study of Kongsfjorden, Svalbard. The research question of this thesis is to identify the controlling factors on variable glacial modification of the bedrock dominated areas in Kongsfjorden. Fieldwork was conducted to analyze bedrock structures and ... -
Morfologisk og sedimentologisk studium av det moderne og hevede Storfjorddeltaet, Troms
(Master thesis; Mastergradsoppgave, 2018-07-05)Denne oppgaven består i å undersøke det aktive Storfjorddeltaet med hensyn på morfologi og sedimentologi. Den hevede delen av deltaet ble også undersøkt ved 3 snitt for å finne ut hvordan deltaet hadde progradert for omtrent 3000 år siden og frem til i dag. Kartlegging og flybilder ble brukt, i tillegg til siling av prøver og datering av materiale. Resultatet ble at deltaet er klassifisert som et ... -
Source of CO2 in large Talc-Carbonate veins in serpentinites of the Zermatt-Saas Fee unit
(Master thesis; Mastergradsoppgave, 2018-07-03)The Zermatt-Saas Fee zone represents an ophiolitic sequence within the Western Alps derived from the paleo ocean Liguro-Piemontaise. The melting of the Unterer Theodulgletcher glacier newly uncovered some Tc-Mgs and Atg-Dol veins within serpentinite host rock. Both the serpentinite and veins are fresh as they have been protected from weathering by the glacier, which makes this area ideal for ... -
Correction Strategies for Breathing Induced Motion in PET Images
(Master thesis; Mastergradsoppgave, 2019-06-03)Breathing induced motion highly impacts the quality of PET images. Motion blur impacts important parameters such as standardised uptake value (SUV) and lesion volume. To be able to stage lung cancer correctly, and provide correct treatment, the impact of motion needs to be reduced. There exists techniques to combat the breathing motion, such as elastic motion correction and gating strategies. ... -
Charging Effects and Detection of Mesospheric Dust with the Instrument SPID on the G-Chaser Rocket
(Master thesis; Mastergradsoppgave, 2019-06-01)Smoke Particle Impact Detector (SPID) is a faraday cup impact probe designed and built by the University of Tromso (UIT). Its main purpose is to measure nanometer sized smoke particles (in-situ) in the atmosphere, and to do that it needs to be launched on a sounding rocket. Its design is an open faraday cup with grids to shield out ambient plasma and a larger slanted impact grid to measure the ... -
On the Meteoric Smoke Particle Detector SPID: Measurements and analysis from the G-chaser rocket campaign
(Master thesis; Mastergradsoppgave, 2019-06-01)The Smoke Particle Impact Detector (SPID), newly designed at the University of Tromsø, was launched from Andøya 09:13 UTC the 13. January 2019. SPID is designed to detect meteoric smoke particles (MSPs) in winter mesospheric conditions. The rocket had a velocity of 1600 ms-1 at ~55 km where the nosecone was separated. At ~ 60km, SPID detected a signal of 17nA on the middle plate. The dynamics of the ... -
Angular dependence of wide altitude ion line enhancements (WAILEs) during ionospheric heating at the EISCAT Tromsø Facility
(Master thesis; Mastergradsoppgave, 2019-06-01)This thesis presents the first sub-radar beam resolution determination of the angular width of wide altitude ion line enhancements (WAILEs), found to be 0.5 degrees around magnetic zenith, observed during a HF radio wave heating experiment at the EISCAT Tromsø Heating facility on 27 November 2014. The results of ray tracing simulations are detailed. The simulations are based on the hypothesis that ... -
Forbedret tilstandsovervåkning av bærelager i Sjona kraftverk ved digitalisering
(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 ... -
Deep Image Clustering with Tensor Kernels and Unsupervised Companion Objectives
(Master thesis; Mastergradsoppgave, 2019-05-31)Deep image clustering is a rapidly growing branch of machine learning and computer vision, in which deep neural networks are trained to discover groups within a set of images, in an unsupervised manner. Deep neural networks have proven to be immensely successful in several machine learning tasks, but the majority of these advances have been in supervised settings. The process of labeling data for ... -
ICEBEAR: An All‐Digital Bistatic Coded Continuous Wave Radar for Studies of the E Region of the Ionosphere
(Journal article; Peer reviewed, 2019-04-15)The Ionospheric Continuous-wave E region Bistatic Experimental Auroral Radar (ICEBEAR) is a coherent scatter ionospheric radar. It operates at a frequency of 49.5 MHz, which is ideal for observing E region coherent echoes. The radar is located in Saskatchewan, Canada, and is operated by the University of Saskatchewan. The ICEBEAR system uses a continuous-wave (CW) signal and requires isolation between ...
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