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norskBlar i tittel Fakultet for naturvitenskap og teknologi
Viser treff 1650-1669 av 4758
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Generating customer's credit behavior with deep generative models
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-17)Banks collect data x<sub>1</sub> in loan applications to decide whether to grant credit and accepted applications generate new data x<sub>2</sub> throughout the loan period. Hence, banks have two measurement-modalities, which provide a complete picture about customers. If we can generate x<sub>2</sub> conditioned on x<sub>1</sub> keeping the relationship between these two modalities, credit and ... -
Generating polytopes from Coxeter groups
(Master thesis; Mastergradsoppgave, 2019-05-31)The main goal of this thesis is to study finite reflection groups (Coxeter groups) W and to use these to generate polytopes in two and three dimensions. Such polytopes will be generated as the convex hull of the W-orbit through an initial point. We prove an efficient recipe for finding the stabilizer of an initial point, and examine several examples of such polytopes and illustrate how many vertices, ... -
Generation of Lidar-Predicted Forest Biomass Maps from Radar Backscatter with Conditional Generative Adversarial Networks
(Conference object; Konferansebidrag, 2020) -
Generation of the lower-thermospheric vertical wind estimated with the EISCAT KST radar at high latitudes during periods of moderate geomagnetic disturbance
(Journal article; Tidsskriftartikkel; Peer reviewed, 2008-06-11)Lower-thermospheric winds at high latitudes during moderately-disturbed geomagnetic conditions were studied using data obtained with the European Incoherent Scatter (EISCAT) Kiruna-Sodankylä-Tromsø (KST) ultrahigh frequency (UHF) radar system on 9–10 September 2004. The antenna-beam configuration was newly designed to minimize the estimated measurement error of the vertical neutralwind speed in the ... -
A Generic Undo Support for State-Based CRDTs
(Chapter; Bokkapittel, 2020-02-11)CRDTs (Conflict-free Replicated Data Types) have properties desirable for large-scale distributed systems with variable network latency or transient partitions. With CRDT, data are always available for local updates and data states converge when the replicas have incorporated the same updates. Undo is useful for correcting human mistakes and for restoring system-wide invariant violated due to long ... -
Generisk beredskap - adekvat for å håndtere den neste store krisen? En casestudie av beredskap for hendelser med lav sannsynlighet-høy konsekvens i en kommune
(Master thesis; Mastergradsoppgave, 2019-05-31)Norgeshistorien er full av større naturhendelser, ulykker og kriser, det være seg både samfunns- og menneskeskapte. Vi ser at fokuset på disse har økt i nyere tid, særlig etter terrorangrepene i regjeringskvartalet og på Utøya 22. Juli 2011. Forberedelsene for å unngå slike hendelser, håndtere de dersom de skulle inntreffe og gjenoppreise samfunnet i etterkant, er en oppgave som jobbes med både ... -
Genome mapping of seed-borne allergens and immunoresponsive proteins in wheat
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-08-17)Wheat is an important staple grain for humankind globally because of its end-use quality and nutritional properties and its adaptability to diverse climates. For a small proportion of the population, specific wheat proteins can trigger adverse immune responses and clinical manifestations such as celiac disease, wheat allergy, baker’s asthma, and wheat-dependent exercise-induced anaphylaxis (WDEIA). ... -
GEO-3144/8144 Teaching Cruise: Geologically controlled hydrocarbon seepage in Hopendjupet and the wider Barents Sea
(Research report; Forskningsrapport, 2022-11-18)The CAGE22-6 cruise on-board R/V Helmer Hanssen hosted UiT´s Arctic Marine Geology and Geophysics (GEO-8144 and GEO-3144) field course for PhD and Master students, and was carried out in collaboration with NPD – the Norwegian Petroleum Directorate and the INTPART project HOTMUD based at Centre for Earth Evolution and Dynamics (CEED) the University of Oslo. The cruise was also a part of the UNESCO ... -
Geochemical characterisation of northern Norwegian fjord surface sediments: A baseline for further paleo-environmental investigations
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-08-26)Norwegian fjord sediments are promising archives for very high resolution records of past environmental changes. Recent investigations of the modern depositional environment within fjords revealed that the accurate quantification of the inputs, sources, and sedimentary preservation of organic and inorganic material is crucial to decipher long term past climate signals in the sedimentary record ... -
Geochemical characteristics of sediment- and mafic rock-hosted Cu deposits in the Kåfjord area, Alta-Kvænangen Tectonic Window, Northern Norway
(Mastergradsoppgave; Master thesis, 2021-06-15)The Precambrian Alta-Kvænangen Tectonic Window (AKTW) located in the northern part of Norway, hosts different types of copper mineralization. Some of Cu occurrences have been previously mined, but their geochemical and stable isotope characteristics have not been a subject of detailed investigations, and therefore the relevant ore-forming processes are still poorly understood. This study, brings new ... -
Geochemical evidence for seabed fluid flow linked to the subsea permafrost outer border in the South Kara Sea
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-04-16)Driven by rising bottom water temperatures, the thawing of subsea permafrost leads to an increase in fluid flow intensity in shallow marine sediments and results in the emission of methane into the water column. Limiting the release of permafrost-related gas hydrates and permafrost- sequestered methane into the global carbon cycle are of primary importance to the prevention of future Arctic Ocean ... -
Geochemical investigations of northern Norwegian fjord sediments - Sources and spatial variability of marine and terrigenous components
(Master thesis; Mastergradsoppgave, 2016-05-11)Fjords represent unique coastal marine environments with high sedimentation rates. They can be used for intensive investigations focusing on geochemical, mineralogical, biological, and sedimentological processes. In this study I investigate 42 surface sediment samples from the outer and inner parts of the Vestfjord, Ofotfjord, Tysfjord and tributary fjord arms in northern Norway. Samples were analysed ... -
The geochemical signature of Cu mineralisation preserved in stream sediments from the Alta-Kvænangen Tectonic Window, Northern Norway
(Master thesis; Mastergradsoppgave, 2021-06-13)The Paleoproterozoic Greenstone Belts of Fennoscandia are metamorphosed and deformed volcanic and sedimentary basins with a high metallic ore potential. One of those, the Alta-Kvænangen Tectonic Window (AKTW), is exposed as a window below the Caledonides of Northern Norway. The Kåfjord area located within the AKTW hosts numerous known Cu occurrences. The Cu mineralisation in Kåfjord occurs mostly ... -
Geochemistry of rutile-bearing veins at Engebøfjellet, Naustdal, Norway.
(Master thesis; Mastergradsoppgave, 2018-11-15)The Engebøfjellet eclogite, located in Naustdal, Norway, contain quartz veins with large rutile (TiO2) phenocrystals. Trace element composition of rutile deposited in veins and in the eclogite matrix was analysed with the use of LA-ICP-MS. The Nb content decrease with increasing V in the rutile, and contents of these elements vary depending on depositional environment. One quartz vein associated ... -
Geochemistry of sediment-hosted copper deposits and their environmental impact: A case study from the Nussir and Ulveryggen deposits, Repparfjord Tectonic Window, Northern Norway
(Doctoral thesis; Doktorgradsavhandling, 2019-11-07)Modern growing economy and technology require metals. Therefore mining is an unavoidable process. Mining in its turn results in the production of large amounts of mine waste. This research is focused on one type of mine waste, mine tailings, formed after the processing of Cu-sulphides deposits. Acid mine drainage (AMD) is a consequence of the oxidation of sulphide-rich rocks and has a drastic impact ... -
Geochemistry of the stratiform iron Dunderlandsdalen deposits, Nordland
(Master thesis; Mastergradsoppgave, 2019-05-15)The Dunderlandsdalen iron district, Northern Norway, hosts a world-class stratiform Fe-mineralization (total tonnage of ~500 Mt at 33% Fe). The iron ore units belong to the Dunderland Formation in the Ramnålia Nappe, which further belongs to the Rødingsfjellet Nappe of the Caledonian Uppermost Allochthon. Hematite and magnetite represent the principal ore minerals and are hosted by amphibolite grade ... -
Geochronology and chemostratigraphy of the 2.47–1.96 Ga rift-related volcano-sedimentary succession in the Karasjok Greenstone Belt, northern Norway, and its regional correlation within the Fennoscandian Shield
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-09)New geochronological data for the amphibolite-facies volcano-sedimentary Karasjok Greenstone Belt in northwestern Fennoscandia bracket its age between 2.47 and 1.96 Ga. The volcano-sedimentary units were deposited on the 3005 24 to 2776 69 Ma crystalline basement rocks of the Jergul Gneiss Complex. The lowermost Vuomegielas Formation contains rhyodacites dated at 2469 12 Ma that were deposited in ... -
Geodesic Webs and PDE Systems of Euler Equations
(Journal article; Tidsskriftartikkel; Peer reviewed, 2008-10-30)We find necessary and sufficient conditions for the foliation defined by level sets of a function f(x1, ..., xn) to be totally geodesic in a torsion-free connection and apply them to find the conditions for d-webs of hypersurfaces to be geodesic, and in the case of flat connections, for d-webs (d ≥ n + 1) of hypersurfaces to be hyperplanar webs. These conditions are systems of generalized Euler ... -
Geodesic Webs of Hypersurfaces
(Working paper; Arbeidsnotat, 2008-12-11)In the present paper we study geometric structures associated with webs of hypersurfaces. We prove that with any geodesic (n + 2)-web on an n-dimensional manifold there is naturally associated a unique projective structure and, provide that one of web foliations is pointed, there is also associated a unique affine structure. The projective structure can be chosen by the claim that the leaves of all ... -
Geodesic Webs on a Two-Dimensional Manifold and Euler Equations
(Journal article; Tidsskriftartikkel; Peer reviewed, 2008-10-30)We prove that any planar 4-web defines a unique projective structure in the plane in such a way that the leaves of the web foliations are geodesics of this projective structure. We also find conditions for the projective structure mentioned above to contain an affine symmetric connection, and conditions for a planar 4-web to be equivalent to a geodesic 4-web on an affine symmetric surface. Similar ...
