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norskBlar i tittel Fakultet for naturvitenskap og teknologi
Viser treff 1460-1479 av 4753
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Fatigue og arbeidstidsordning blant piloter
(Master thesis; Mastergradsoppgave, 2021-05-31)I en stadig mer globalisert verden har luftfart fått en sentral rolle. De siste års utvikling, der piloter jobber stadig mer med dårligere arbeidsvilkår enn tidligere, er en trussel mot flysikkerheten. Fatigue er en av de ulykkesårsakene som er enklest å forebygge. Nasjonal Transportplan fra 2021 har pekt på psykisk helse og fatigue for flygere som viktige fokusområder fremover (Meld. St. 20 (2020 ... -
Fault-controlled asymmetric landscapes and low-relief surfaces on Vestvågøya, Lofoten, North Norway: inherited Mesozoic rift-margin structures?
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-20)The Lofoten Ridge is an integral basement horst of the hyperextended continental rift-margin off northern Norway. It is a key area for studying onshore–offshore rift-related faults, and for evaluating tectonic control on landscape development along the North Atlantic margin. This paper combines onshore geomorphological relief/aspect data and fault/fracture analysis with offshore bathymetric and ... -
Fault-controlled fluid circulation and diagenesis along basin-bounding fault systems in rifts - Insights from the East Greenland rift system
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-11-05)In marine rift basins, deep-water clastics (>200 m) in the hanging wall of rift- or basin-bounding fault systems are commonly juxtaposed against crystalline “basement” rocks in the footwall. A distinct feature of such fault systems is therefore the juxtaposition of relatively highly permeable, unconsolidated sediments against relatively low-permeable basement rocks. Due to limited surface exposure ... -
Faulting and the relationship to fluid migration and shallow gas accumulation in the Hammerfest Basin, SW Barents Sea
(Master thesis; Mastergradsoppgave, 2015-05-01)This thesis has focused its efforts to identify and map faults and their relationships to shallow gas accumulations and fluid flow features. The area of this investigation lies in the hydrocarbon-prone Hammerfest Basin in the southwestern Barents Sea, above the Base Cretaceous. Nine 3D seismic datasets were used in this study, aiming to improve the knowledge of the timing of the tectonic activity ... -
Feasibility analysis of capacity expansion in Skjerka power station based on production simulation in ProdRisk.
(Master thesis; Mastergradsoppgave, 2023-05-31)The Norwegian energy system has traditionally had an energy surplus with a large share of hydro power. Due to increasing demand of power from large scale electrification, the power system is estimated to experience hours of national power deficient in 2030 even with moderate increase of consumption. Extensive increase of variable production renewable power from wind and solar in Northern Europe has ... -
Feasibility of using the P-Cable high-resolution 3D seismic system in detecting and monitoring CO2 leakage
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-23)The P-Cable technology is an acquisition principle for high-resolution and ultra-high-resolution 3D seismic data. Many 3D seismic datasets have been acquired over the last decade, but the application in time-lapse studies for monitoring of CO2 storage is a new and intriguing topic. High-resolution 3D (HR3D) seismic has the potential to detect and monitor CO2 leakage at carbon capture and storage ... -
Feasibility study of Preventing Snow Accumulations on Roofs using Airflows
(Master thesis; Mastergradsoppgave, 2020-07-09)This thesis is intended to contribute to research in cold climate engineering. Further it intends to provide a principle solution for structural and avalanche safety due to snowfall on roofs. We have conducted a feasibility study of preventing snow from accumulating on roofs using airflows. This includes empirical, numerical and experimental methods. Snow loads on roofs makes great impact on ... -
Feasibility study of Unmanned Aerial Vehicles (UAV) application for ultrasonic Non-Destructive Testing (NDT) of Wind Turbine Rotor Blades. Preliminary experiments of handheld and UAV utrasonic testing on glass fibre laminate
(Master thesis; Mastergradsoppgave, 2017-05-31)In this thesis, we have conducted a feasibility study on UAV application for ultrasonic pulsed non-destructive testing of wind turbine rotor blades. Due to the high initial cost of wind turbines, and their decreasing availability due to increasing size and offshore locations, it is imperative to properly maintain these structures over their 10-30-year lifetime. Operation and maintenance costs can ... -
A Feasibility Study of Using Waste Thermal Energy from a District Heating System for Absorption Cooling
(Master thesis; Mastergradsoppgave, 2020-07-13)Waste incineration-based district heating plants in Norway struggle from energy efficiency drawbacks during the warmer months of the year from May - September due to the reduced demand in heating. As a result, thermal energy gets discarded to ambient air, which affects the energy efficiency of the plants. This study aims at presenting an overview of the waste incineration industry in Norway and ... -
Feature Detector: a support system for tracking satellite detected dynamic and permanent features
(Master thesis; Mastergradsoppgave, 2013-05-15)Even with today's technologies many tasks relies on humans to be completed correctly. Engineers must monitor steps in large chains of operations, and verify the results before the next process is allowed to continue. In many such systems, a lot of useful data passes by without ever been stored for efficient future usage. Even though some operations must be verified by an experienced human eye, ... -
Features and structure of a cold active N-acetylneuraminic acid lyase
(Journal article; Peer reviewed, 2019-06-11)N-acetylneuraminate lyases (NALs) are enzymes that catalyze the reversible cleavage and synthesis of sialic acids. They are therefore commonly used for the production of these high-value sugars. This study presents the recombinant production, together with biochemical and structural data, of the NAL from the psychrophilic bacterium Aliivibrio salmonicida LFI1238 (AsNAL). Our characterization shows ... -
Features extraction of wind ramp events from a virtual wind park
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-11-26)In the European renewable energy portfolio, wind has a sizeable share in the total energy production. The Nordic and Baltic energy systems in particular are benefiting from wind energy to reach the greenhouse gas emissions reduction objectives set by the EU. The wind energy production varies with time, and this intermittent characteristic imposes a challenge for full utilization of renewable energy ... -
Features of Mobile Diabetes Applications: Review of the Literature and Analysis of Current Applications Compared Against Evidence-Based Guidelines
(Journal article; Tidsskriftartikkel; Peer reviewed, 2011)Background: Interest in mobile health (mHealth) applications for self-management of diabetes is growing. In July 2009, we found 60 diabetes applications on iTunes for iPhone; by February 2011 the number had increased by more than 400% to 260. Other mobile platforms reflect a similar trend. Despite the growth, research on both the design and the use of diabetes mHealth applications is scarce. ... -
Federated Partially Supervised Learning With Limited Decentralized Medical Images
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-20)Data government has played an instrumental role in securing the privacy-critical infrastructure in the medical domain and has led to an increased need of federated learning (FL). While decentralization can limit the effectiveness of standard supervised learning, the impact of decentralization on partially supervised learning remains unclear. Besides, due to data scarcity, each client may have access ... -
Feedback Differential Invariants
(Journal article; Tidsskriftartikkel, 2008-12-07)The problem of feedback equivalence for control systems is considered. An algebra of differential invariants and criteria for the feedback equivalence for regular control systems are found. -
Feedback Equivalence of 1-dimensional Control Systems of the 1-st Order
(Working paper; Arbeidsnotat, 2008-12-09)The problem of local feedback equivalence for 1-dimensional control systems of the 1-st order is considered. The algebra of differential invariants and criteria for the feedback equivalence for regular control systems are found. -
Felles situasjonsforståelse og beslutningstaking i snøskredaksjoner
(Master thesis; Mastergradsoppgave, 2022-05-31)Snøskredulykker rammer samfunnet flere ganger årlig. Overlevelsestiden forbundet med å bli fullstendig begravet i snøskred er svært kort. Redningsoperasjoner i miljøer der disse ulykkene skjer innebærer ofte betraktelige usikkerhets- og risikomomenter for det betydelige antallet redningsmannskap som rykker ut på slike hendelser. Som en konsekvens av disse faktorene, kreves det veloverveide beslutninger ... -
Felles situasjonsforståelse og styring under kriser
(Master thesis; Mastergradsoppgave, 2023-06-30)Natt til 30.desember 2020 gikk det et kvikkleireskred i Gjerdrum og en lang og krevende redningsaksjon ble satt i gang. Redningsaksjonen involverte en rekke aktører, både offentlige, private og frivillige organisasjoner. Samvirke er et sentralt begrep i slike redningsaksjoner. Kvikkleireskredet på Gjerdrum viste hvordan det norske beredskapssamvirket fungerer på sitt beste. I tillegg til et godt ... -
The few touch digital diabetes diary : user-involved design of mobile self-help tools for peoplewith diabetes
(Doctoral thesis; Doktorgradsavhandling, 2009-12-10)Paradoxically, the technological revolution that has created a vast health problem due to a drastic change in lifestyle also holds great potential for individuals to take better care of their own health. The first consequence is not addressed in this dissertation, but the second represents the focus of the work presented, namely utilizing ICT to support self-management of individual health challenges. ... -
Filament motions in magnetized plasmas
(Master thesis; Mastergradsoppgave, 2018-02-08)Interchange motions of magnetized plasmas due to either a non-uniform magnetic field or a gravitational field lead to charge polarization within a filamentary structure and set up convection. In this project we have provided a clear derivation of the two-field model equations that describe these filament motions. We have also derived an energy theorem for small amplitude oscillations. We have ...
