English
norskFakultet for naturvitenskap og teknologi
Browse by
Sub-communities within this community
-
EISCAT [20]
-
Institutt for kjemi [581]
Collections in this community
Recent additions
-
The Eurasian Ice Sheet: Status and Challenges
(Conference object; Konferansebidrag, 2024-03-15) -
Modelling the Eurasian Ice Sheet
(Conference object; Konferansebidrag, 2024-03-15) -
Cross-population evaluation of cervical cancer risk prediction algorithms
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-24)Background - Cervical cancer is a preventable disease, despite being one of the most common types of female cancers worldwide. Integrating existing programs for cervical cancer screening with personalized risk prediction algorithms can improve population-level cancer prevention by enabling more targeted screening and contrive preventive healthcare innovations. While algorithms developed for cervical ... -
Contamination of 8.2 ka cold climate records by the Storegga tsunami in the Nordic Seas
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-04-04)The 8200-year BP cooling event is reconstructed in part from sediments in the Norwegian and North Seas. Here we show that these sediments have been reworked by the Storegga tsunami – dated to the coldest decades of the 8.2 ka event. We simulate the maximum tsunami flow velocity to be 2–5 m/s on the shelf offshore western Norway and in the shallower North Sea, and up to about 1 m/s down to a water ... -
NordVulk 1974-2024
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024)Nordisk Vulkanologisk Institut, senare känt som Nordisk Vulkanologisk Center (NordVulk) på Island fyller 50 år 2024. Tyvärr sammanfaller jubileet med att NordVulk upphör i sin nuvarande form och en lång och framgångsrik era med nordisk vulkanologisk forskning på Island tar slut. Här berättar vi lite om NordVulks historia och bifogar några korta anekdoter från livet där. -
Glacial-interglacial sedimentation control on gas seepage exemplified by Vestnesa Ridge off NW Svalbard margin
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-04-08)Vestnesa Ridge is built-up of thick contourites mainly deposited during the last ∼5 million years. Methane leaks from deep gas reservoirs creating pockmarks on its crest, and which have been the focus of numerous studies. Sedimentation patterns in relation to the pronounced changes in oceanography and climate of the last glacial-interglacial cycles and its possible impact of seepage of gas have ... -
New cold seep sites on the continental slope southwest to Svalbard
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-04-09)We discovered seafloor features such as bacterial mats and carbonate crusts typical for active methane seeps on the continental slope southwest of Svalbard. These features are associated with two main northwest-southeast trending morphological structures that are oriented parallel to the regional continental slope. Both structures occur at c. 800 m water depth, at the boundary between the Storfjorden ... -
Beyond the Oberbeck-Boussinesq and long wavelength approximation
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-22)We present the first simulations of a reduced magnetized plasma model that incorporates both arbitrary wavelength polarization and non-Oberbeck–Boussinesq effects. Significant influence of these two effects on the density, electric potential and <i><b>E</i></b> × <i><b>B</i></b> vorticity and non-linear dynamics of interchange blobs are reported. Arbitrary wavelength polarization implicates so-called ... -
DFT and electrochemical study on some iron(III) complexes with 2-hydroxybenzophenones
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-02-17)The synthesis, identification and electrochemical behaviour iron(III) complexes containing different 2-hydroxybenzophenone ligands are reported. The first reduction of the tris(2-hydroxybenzophenone)iron(III) complexes follow the same trend as that of the free, uncoordinated ligands and bis(2-hydroxybenzophenone)copper(II) complexes. The first reduction of the iron(III) complexes occur at a potential ... -
Quantifying Intramolecular Basis Set Superposition Errors
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-08-18)We show that medium-sized Gaussian basis sets lead to significant intramolecular basis set superposition errors at Hartree–Fock and density functional levels of theory, with artificial stabilization of compact over extended conformations for a 186 atom deca-peptide. Errors of ∼80 and ∼10 kJ/mol are observed, with polarized double zeta and polarized triple zeta quality basis sets, respectively. Two ... -
Analysis of time series of polarimetric sea ice signatures observed in fast ice it the Belgica Bank area
(Journal article; Tidsskriftartikkel, 2023-10-20)The CIRFA-Cruise 2022 with <i>RV Kronprins Haakon</i> to the north-eastern coast of Greenland in the period April 22nd to May 9th 2022 was organised to perform measurements and make observations which allow for validation of sea ice remote sensing information and forecast products resulting from work in the Centre for Integrated Remote Sensing and Forecasting for Arctic Operations(CIRFA), a Centre ... -
Characterizing vegetation and return periods in avalanche paths using lidar and aerial imagery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-04-14)Snow avalanches are a hazard and ecological disturbance across mountain landscapes worldwide. Understanding how avalanche frequency affects forests and vegetation improves infrastructure planning, risk management, and avalanche forecasting. We implemented a novel approach using lidar, aerial imagery, and a random forest model to classify imagery-observed vegetation within avalanche paths in southern ... -
Influence of a rigid backstop on the flow pattern during thrusting of the supracrustal Balsfjord Series of the North Norwegian Caledonides
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-17)The Caledonian evolution of the low–medium grade Balsfjord Series (Troms, Northern Norway) is characterized by four sets of deformation structures that developed progressively during burial and exhumation from underneath the high-grade Nakkedal and Tromsø nappe complexes. The Balsfjord Series commonly displays top-to-the SSE–SE directed movement during the development of the main metamorphic fabric ... -
Persistence of Holocene ice cap in northeast Svalbard aided by glacio-isostatic rebound
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-29)The deglaciation of the Svalbard-Barents Sea Ice Sheet was driven by relative sea-level rise, the incursion of North Atlantic waters around Spitsbergen, and increasing summer insolation. However, ice retreat was inter rupted by asynchronous re-advances that occurred into high relative seas, during a period associated with warm regional waters and elevated summer temperatures. Better understanding ... -
Distinguishing Mineral Oil Slicks from Low Wind Areas using Rapid Repeat Synthetic Aperture Radar Imagery
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-18)A method for differentiating marine oil slicks from radar-dark, low wind areas in open water using rapid repeat SAR imagery is reported. The study uses data acquired by the airborne UAVSAR L-band SAR instrument, imaging the Coal Oil Point seep field near Santa Barbara, California. Time-series of images from three different days are analyzed, all containing both verified oil slicks and low wind zones. ... -
Real-Time Change Detection with Convolutional Density Approximation
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-04-02)Background Subtraction (BgS) is a widely researched technique to develop online Change Detection algorithms for static video cameras. Many BgS methods have employed the unsupervised, adaptive approach of Gaussian Mixture Model (GMM) to produce decent backgrounds, but they lack proper consideration of scene semantics to produce better foregrounds. On the other hand, with considerable computational ... -
On uniqueness of submaximally symmetric parabolic geometries
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-01-24)Among (regular, normal) parabolic geometries of type (<i>G,P</i>), there is a locally unique maximally symmetric structure and it has symmetry dimension dim(<i>G</i>). The symmetry gap problem concerns the determination of the next realizable (submaximal) symmetry dimension. When <i>G</i> is a complex or split-real simple Lie group of rank at least three or when (<i>G,P</i>) = (<i>G<sub>2</sub></i>, ... -
Preservice and inservice teachers’ views on digital tools for diverse learners in mathematics education
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023)Although teachers are expected to use digital tools in their mathematics teaching in many countries, little is known about preservice and inservice teachers’ digital competence, especially in relationship to specific groups of school students. Results from a survey of 394 preservice teachers and 61 inservice teachers, at three Norwegian institutions, provide information on how they considered different ... -
Investigation and analysis of the ‘cold’ sensation relation with respect to associated parameters: wind velocity, ambient temperature, humidity, and irradiance
(Master thesis; Mastergradsoppgave, 2019-07-15)The Arctic is considered as one of the regions in the world with various resources including oil and gas. Many industries are moving further up north to this area or new industries are being established. Technologies and industries in the Arctic have many challenges regarding the harsh cold climate. One of the main challenges which is of importance in this thesis is human exposure to the cold that ... -
Assessing resilience in mechanical systems: an industrial perspective
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024)Purpose - Resilience as a novel concept has attracted the most attention in the management of engineering systems. The main goal of engineering systems is production assurance and increasing customer satisfaction which depends on the suitable performance of mechanical equipment. “A resilient system is defined as a system that is resistant to disruption and failures and can recover itself and returns ...
RSS 1.0