Blar i Faculty of Mathematics and Natural Sciences på tittel
Viser treff 9618-9637 av 9942
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Vannbasert eor i oppsprukne bergarter - økt oljeutvinning ved kjemikalietilsetning i injeksjonsvannet
(Master thesis, 2010-06-01)En stor del av verdens hydrokarbonreserver finnes i karbonater. Karbonatreservoarer er komplekse fordi reservoarbergarten ofte er sprø og sprekker lett. Mineralsammensetningen av karbonater gjør poreoverflaten mer tilbøyelig ... -
Vanninjektivitet og svekking av kalk under injeksjon av kaldt vann
(Master thesis, 2014-12-05)Primær oljeutvinning ved trykkavlastning gir ofte lav utvinningsgrad, og etterlater stor restoljemetning i reservoaret. For å forbedre oljeutvinningsgraden kan andre produksjonsmetoder benyttes; vanninjeksjon har i lang ... -
Vannkvalitet i marin yngelproduksjon
(Research report, 2015) -
Vannutfelling på rustoverflater i gassrør
(Master thesis, 2009-06-12)Målet for denne oppgaven har vært å legge et grunnlag for beregninger av vannegenskaper i adsorbert fase på rust. Egenskaper bestemmes av et antall kompliserte termodynamiske og kinetiske mekanismer, som gjør at problemstillingen ... -
Variability along the Atlantic water pathway in the forced Norwegian Earth System Model
(Peer reviewed; Journal article, 2018-03-27)The growing attention on mechanisms that can provide predictability on interannual-to-decadal time scales, makes it necessary to identify how well climate models represent such mechanisms. In this study we use a high (0.25° ... -
Variability and decadal trends in the Isfjorden (Svalbard) ocean climate and circulation – An indicator for climate change in the European Arctic
(Journal article; Peer reviewed, 2020)Isfjorden, a broad Arctic fjord in western Spitsbergen, has shown significant changes in hydrography and inflow of Atlantic Water (AW) the last decades that only recently have been observed in the Arctic Ocean north of ... -
Variability and mixing of the Filchner overflow plume on the continental slope,Weddell Sea
(Peer reviewed; Journal article, 2019-01)A large fraction of Antarctic Bottom Water is produced in the Weddell Sea, through mixing between the cold and dense shelf water masses and the warm and saline off-shelf water. We present observations of the dense Filchner ... -
Variability at Ocean Weather Station M in the Norwegian Sea
(ICES Marine Science Symposia; 219, Chapter, 2003)Time series of temperature and salinity from Ocean Weather Station M are analysed for periodic cycles of interannual to decadal scale. Time evolutions of the spectra show various spectral peaks at all depths, but none of ... -
Variability in deep water mass properties and mixing in the Norwegian Sea
(Master thesis, 2016-12-19)Decadal variations of the Norwegian Sea Deep Water are presented for the 1990s and 2000s. While salinity values have only slightly increased for the Norwegian Basin, there is a noticeable increase in potential temperature ... -
Variability in hydrochemical properties and composition of the dense water in the Faroese Channels
(Master thesis, 2018-06-21)The temporal variability in deep water properties and composition in both Faroe-Shetland and Faroe Bank Channel were examined in June 2002, July 2009, and April 2015. Differences in the water column structure and property ... -
Variability in ISOW vigor over the last 1300 years and its relationship to climate
(Master thesis, 2009-06-02)Resolving the scale and origins of recent low frequency (decadal-centennial) climate variations, such as the AMO, is crucial for predicting how natural variability and anthropogenic forcing will interact to affect future ... -
Variability in the formation and framework polymorphism of metal-organic frameworks based on yttrium(III) and the bifunctional organic linker 2,5-dihydroxyterephthalic acid
(Journal article; Peer reviewed, 2021)Depending on the solvothermal reaction conditions, we obtained three different metal‐organic frameworks with yttrium(III) as metal component and 2,5‐dihdyroxyterepthalic acid (H4dhtp) as bifunctional organic linker: ... -
Variability in the Geostrophic Flow of the Agulhas Current, an Investigation of Sea Surface Height Obtained from Altimetry Data
(Master thesis, 2015-06-15)The distinct and robust structure of the greater Agulhas Current regime southeast of southern Africa was depicted in the spatial pattern of the absolute dynamic topography. As a part of Work Package 3: Environmental driver, ... -
Variability in transport of fish eggs and larvae. IV. Interannual variability in larval stage duration of immigrating plaice in the Dutch Wadden Sea
(Peer reviewed; Journal article, 2009-09-18)Larval immigration of plaice Pleuronectes platessa L. into the western Wadden Sea in spring was followed biweekly from 1993 to 2002. For each year (1993 excluded), 150 settling individuals were selected and used for ... -
Variability of perfusion estimates from synthetic and clinical magnetic resonance imaging data
(Master thesis, 2023-02-13) -
Variability of precipitation in complex terrain and the investigation of representativeness of a single point measurement for the Matre Hydro System, Western Norway.
(Master thesis, 2009-06-08)Orography is strongly affecting precipitation. Especially over complex terrain, the precipitation fields can show high spatial variability even over very small scales. In cooperation between the power company BKK ... -
Variable importance: Comparison of selectivity ratio and significance multivariate correlation for interpretation of latent‐variable regression models
(Journal article; Peer reviewed, 2020)This work examines the performance of significance multivariate correlation (sMC) and selectivity ratio (SR) for ranking variables according to their importance in latent-variable regressions (LVRs) models. Both indices ... -
Variable Nordic Seas Inflow Linked to Shifts in North Atlantic Circulation
(Journal article; Peer reviewed, 2021)The inflow across the Iceland-Scotland Ridge determines the amount of heat supplied to the Nordic Seas from the subpolar North Atlantic (SPNA). Consequently, variable inflow properties and volume transport at the ridge ... -
Variable Number of Tandem Repeats (VNTR) analysis of Flavobacterium psychrophilum from salmonids in Chile and Norway
(Peer reviewed; Journal article, 2015-07-14)Background Flavobacterium psychrophilum causes serious fish diseases such RTFS and BCWD, affecting the aquaculture industry worldwide. Commercial vaccines are not available and control of the disease depends on the use of ... -
Variable selection optimization for multivariate classification of metabolomics data
(Master thesis, 2013-05-21)Variable selection is an important step in multivariate calibration in which the number of variables in the independent variable matrix is reduced by eliminating those that are not related to the response. Many methods ...