Now showing items 781-800 of 4949

    • Utforskende arbeidsmetoder for dybdelæring i naturfag 

      Strandmo, Tim Mæland (Master thesis; Mastergradsoppgave, 2023-05-26)
      Bakgrunn: Bakgrunnen for studien er økt fokus på utforskende arbeidsmåter i naturfag. Utforskende arbeidsmåter blir trukket fram som en nødvendighet for at elevene skal oppnå dyp læring i faget og utforskingsbasert naturfag har blitt gjort mer eksplisitt i den nye læreplanen LK20. Mål: Studien vil eksemplifisere hvordan utforskende undervisning kan utføres i praksis, samt formidle elevenes ...
    • The Paleoarchean Buffalo River komatiites: Progressive melting of a single large mantle plume beneath the growing Kaapvaal craton 

      Netshidzivhe, Thendo; Tappe, Sebastian; Wilson, Allan H.; Ishikawa, Akira; Viljoen, Fanus (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-06-01)
      Several Archean granitoid-greenstone terranes are exposed on the southeastern Kaapvaal craton in South Africa, but they received little scientific attention compared to the archetypal greenstone belt successions of the Barberton Mountain Land at the eastern craton margin. This study reports on a detailed field and geochemical survey of the Buffalo River Greenstone Belt at the southern Kaapvaal craton ...
    • Deep generative models for reject inference in credit scoring 

      Andrade Mancisidor, Rogelio; Kampffmeyer, Michael; Aas, Kjersti; Jenssen, Robert (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-05-21)
      Credit scoring models based on accepted applications may be biased and their consequences can have a statistical and economic impact. Reject inference is the process of attempting to infer the creditworthiness status of the rejected applications. Inspired by the promising results of semi-supervised deep generative models, this research develops two novel Bayesian models for reject inference in credit ...
    • Learning latent representations of bank customers with the Variational Autoencoder 

      Andrade Mancisidor, Rogelio; Kampffmeyer, Michael; Aas, Kjersti; Jenssen, Robert (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-15)
      Learning data representations that reflect the customers’ creditworthiness can improve marketing campaigns, customer relationship management, data and process management or the credit risk assessment in retail banks. In this research, we show that it is possible to steer data representations in the latent space of the Variational Autoencoder (VAE) using a semi-supervised learning framework and a ...
    • Factors influencing the time required to don thermal protective immersion suits correctly 

      Azizpour, Hooshyar; Galea, Edwin R.; Erland, Sveinung; Batalden, Bjørn-Morten; Deere, Steven; Oltedal, Helle Asgjerd (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-05-10)
      The cold environment in polar regions introduces additional challenges when abandoning passenger vessels and offshore facilities. The International Maritime Organization Polar Code requires vessels operating in polar regions to be equipped with approved thermal protective immersion suits (TPIS) that can be donned unassisted within 120 s. As time is critical during an evacuation, quantifying the Net ...
    • En videostudie av undervisningsopplegg som omhandler bærekraftig utvikling i naturfag 

      Betten, Rikke Elisabeth (Master thesis; Mastergradsoppgave, 2023-05-31)
      Masteroppgaven er skrevet på bakgrunn av en nysgjerrighet rundt temaet bærekraftig utvikling etter at dette har fått en større plass i fagfornyelsen (LK20). Målet med oppgaven er å belyse hvordan man som lærer kan legge opp undervisningopplegg i temaet slik at elevene får den kompetansen de trenger etter endt undervisning. Gjennomførelsen av studien er blitt gjort i samarbeid med LISSI- prosjektet ...
    • Formativ tilbakemelding gjennom digitale flervalgsoppgaver i CANVAS: En kvalitativ studie av studentenes læringserfaring gjennom arbeid med flervalgsoppgaver i et fysiologi-emne på bachelor nivå 

      Norli, Nora Qi Baskår (Master thesis; Mastergradsoppgave, 2023-05-31)
      Formativ tilbakemeldinger (feedback) fra lærere er viktig for å fremme studentenes læring, og defineres som en prosess der studentene kan nyttiggjøre seg av informasjon om egen prestasjon, og bruke denne til å forbedre kvaliteten på eget arbeid og læringsstrategi (Boud & Molloy, 2013; Shute, 2008). Dette mastergradsprosjektet har sett på bruken av flervalgsoppgaver som verktøy for tilbakemelding og ...
    • Utforskende arbeidsmåter i naturfag - En mixed methods casestudie av en ungdomsskoleklasse og deres lærers erfaringer fra egen naturfagundervisning 

      Soknes, Ottar Fosby (Master thesis; Mastergradsoppgave, 2023-05-02)
      Formålet med denne studien var å undersøke lærere og elevers refleksjoner rundt egen naturfagundervisning, i lys av den økende vektleggingen av utforskende arbeidsmåter i læreplanene. Det ble gjort en mixed methods casestudie av en ungdomsskoleklasse og deres lærer. Studien benytter metodetriangulering i form av spørreskjema og intervjuer med læreren og en gruppe elever. Dette med hensikt å besvare ...
    • Palaeoceanographic and climate changes during the Holocene in Hinlopen Strait, northern Svalbard 

      Hosseini, Mehdi (Mastergradsoppgave; Master thesis, 2023-05-20)
      This study investigates the paleoceanographic changes in the Hinlopen Strait, situated between Spitsbergen and Nordaustlandet, through a multi-proxy analysis of sediment core HH15-1280-GC (439 m water depth). Located near the Polar Front, this region is highly sensitive to even minor alterations in the ocean circulation and climate, which can be reconstructed from marine sediment records. The core ...
    • Oceanographic variability and change in two fjords in northern Norway 

      Bjørndalen, Elena (Mastergradsoppgave; Master thesis, 2023-06-01)
      Long-term hydrographic time series data from two fixed stations in the northern Norwegian fjords Malangen and Balsfjorden from the period 1980 - 2022 have been examined. The data have been supplemented with model results from the ocean model NorFjords160 over the period April 1st 2017 to December 31st 2022. To gain a deeper understanding of the oceanographic variability and change, the environmental ...
    • Garnet growth and mineral geochronology constrains the diachronous Neoproterozoic convergent evolution of the southern Dom Feliciano Belt, Uruguay 

      Percival, Jack James; Konopásek, Jiří; Oyhantçabal, Pedro; Slama, Jiri; Anczkiewicz, Robert (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-05-15)
      The Dom Feliciano Belt of southern Brazil and Uruguay represents part of a larger Neoproterozoic orogenic system formed during the amalgamation of Western Gondwana. The hinterland and foreland domains in parts of the belt preserve deformation structures and metamorphic assemblages that developed during early crustal thickening from c. 650 Ma. However, the metamorphic history of the southern foreland, ...
    • Plume–lithosphere interactions and LIP-triggered climate crises constrained by the origin of Karoo lamproites 

      Tappe, Sebastian; Ngwenya, Ntando S.; Stracke, Andreas; Romer, Rolf L.; Glodny, Johannes; Schmitt, Axel K. (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-04-20)
      We identified a ca. 180 Ma diamondiferous lamproite event in Zambia, establishing a link between ultrapotassic volcanism and the early Jurassic Karoo flood basalt province of sub-Saharan Africa. The cratonic lamproites erupted through the Permo–Triassic Luangwa Rift structure, but MgO-rich ultrapotassic magma formation was unrelated to rifting and triggered by plume–lithosphere interactions during ...
    • Gas seeps in Norwegian waters – distribution and mechanisms 

      Thorsnes, Terje; Chand, Shyam; Bellec, Valerie Karin; Nixon, Chantel; Brunstad, Harald; Lepland, Aivo; Aarrestad, Sigrun M. (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-06-01)
      Gas seeps and fluid-flow related seabed features are found over the entire Norwegian exclusive economic zone (EEZ). Multibeam water-column data from c. 136 000 km2 has revealed more than 5 000 gas seeps. Most of the gas seeps seem to have biogenic, thermogenic or mixed origin; some may be of abiotic origin. The spatial distribution of the gas seeps appears to correlate with: 1 – structural highs ...
    • Conditional averaging of overlapping pulses 

      Nilsen, Rolf Annar Berg (Mastergradsoppgave; Master thesis, 2023-05-15)
      Conditional averaging is a signal processing method used to study turbulent fluctuations in a variety of fields. The method, in its simplest form, works by finding peaks in a signal that fulfill a certain size threshold. Equally sized excerpts of the signal around every peak are then cut out and averaged. This yields the average shape of the events that fulfill the condition. Based on the peak ...
    • An investigation on the damping ratio of marine oil slicks in synthetic aperture radar imagery 

      Quigley, Cornelius Patrick; Johansson, Malin; Jones, Cathleen Elaine (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-06-12)
      The damping ratio has recently been used to indicate the relative internal oil thickness within oil slicks observed in synthetic aperture radar (SAR) imagery. However, there exists no well-defined and evaluated methodology for calculating the damping ratio. In this study, we review prior work regarding the damping ratio and outline its theoretical and practical aspects. We show that the most often ...
    • Dárkon 

      Johansen, Sebastian Lyng (Mastergradsoppgave; Master thesis, 2023-05-22)
      Sports today are more competitive than ever, with an eye for extreme details. Small margins can differentiate between succeeding or failing. That is why it is essential for a team to pay attention to all these margins and use them to their advantage. Technology today plays a huge part in sports. With video cameras and sensors following the players’ every move, it is vital to use this technology ...
    • Multiproxy reconstruction of past methane emissions at Storfjordrenna Pingos site (South of Svalbard) during the last deglaciation 

      Paavilainen, Anne (Mastergradsoppgave; Master thesis, 2023-05-15)
      The main ambition of this thesis was to study the relationship between isotopic signature of fossil foraminifera and past methane emission at Storfjordrenna Pingos site (South of Svalbard) during the last deglaciation in context of past climatic changes. Two gravity cores, the core 1070 from the flank of the presently inactive gas hydrate pingo 5 (GHP5) and the core 1069 from the top of the ...
    • Tram-tastic Cloud Computing 

      Baig, Mirza Aneeq Hassan (Mastergradsoppgave; Master thesis, 2023-05-14)
      This master’s thesis evaluates the scalability and cost-effectiveness of the AWS cloud platform used to collect and utilize data generated by the 87 digitally equipped trams. The SL-18 Cloud Platform was developed before the trams arrived, and resource configuration estimates were made to handle the data generated by the trams. However, with a few trams currently operational, it is crucial to evaluate ...
    • Late Quaternary paleoceanography of Vestnesa Ridge, Fram Strait: Ostracode species as a potential indicator of cold seep activity 

      Chu, Rachel W.C.; Yasuhara, Moriaki; Myrvang Riise, Karoline; Asahi, Hirofumi; Huang, Huai-Hsuan May; Cotton, Laura J.; Hong, Yuanyuan; Rasmussen, Tine Lander (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-06-02)
      Past intensity of methane release from deep-ocean methane hydrates continues to be challenging to reconstruct reliably. Here, we used fossil ostracode fauna paired with foraminiferal δ<sup>13</sup>C values in a marine sediment core from Vestnesa Ridge, western Svalbard margin, to reconstruct methane seepage activity during the late Quaternary and to examine faunal response to deglacial climatic ...
    • Sedimentary ancient DNA: a new paleogenomic tool for reconstructing the history of marine ecosystems 

      Nguyen, Ngoc-Loi; Devendra, Dhanushka; Szymanska, Natalia; Greco, Mattia; Barrenechea Angeles, Inés Andrea; Weiner, Agnes K. M.; Ray, Jessica Louise; Cordier, Tristan; De Schepper, Stijn; Pawłowski, Jan; Pawłowska, Joanna (Journal article; Tidsskriftartikkel, 2023-06-09)
      Sedimentary ancient DNA (sedaDNA) offers a novel retrospective approach to reconstructing the history of marine ecosystems over geological timescales. Until now, the biological proxies used to reconstruct paleoceanographic and paleoecological conditions were limited to organisms whose remains are preserved in the fossil record. The development of ancient DNA analysis techniques substantially expands ...