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Hvordan løser elever i videregående skole beregningsoppgaver i kjemi? En kvalitativ studie av elevers prøvebesvarelser og oppgavebaserte intervjuer
(Master thesis, 2019-06-21)Beregninger er en viktig del av flere konsepter innenfor kjemi, og for tidligere forskning er det vist at gode matematikkferdigheter kan ses i lys med suksess i kjemi. Derfor er det ønskelig å nyansere forskningen ved å ... -
«Hvordan skal jeg kunne finne ut av det?» Ein kvalitativ studie av korleis elevar arbeider for å forstå tal og fakta som ikkje gir meining for dei
(Master thesis, 2020-07-17)Dei nye læreplanane skal legge til rette for djupnelæring. Dette medfører mellom anna at utforskande arbeid og kritisk tenking er sentrale satsingsområde i norsk skule. For å kunne fremme elevane sin kompetanse i å lære ... -
Hvordan skille glasiale sedimenter fra andre minerogene kilder i bresjøer - Et studie basert på innsjøkjerner og prøver fra tilhørende dreneringsfelt sør for Ålfotbreen
(Master thesis, 2016-06-01)Glacier reconstructions from around the world help us understand how the climate has changed over time. Lake sediments have been used as archives for glacier activity for a long time. The relationship between organic ... -
A Hybrid Domain Decomposition Method for Advection-Diffusion Problems
(Department of Applied Mathematics report, Research report, 1996-09) -
Hybrid Modeling of the N-Body Problem with Applications to Astrophysics
(Master thesis, 2022-06-01)Over the last years, the field of hybrid modeling, the concept of combining data-driven machine learning models and numerical solution methods to simulate a physical system, has seen an immense increase in research. This ... -
A hybrid multi-particle approach to range assessment-based treatment verification in particle therapy
(Journal article; Peer reviewed, 2023)Particle therapy (PT) used for cancer treatment can spare healthy tissue and reduce treatment toxicity. However, full exploitation of the dosimetric advantages of PT is not yet possible due to range uncertainties, warranting ... -
A Hybrid Numerical Method for 3D Multiphysics Modeling of Ultrasonic Transit-Time Flowmeters : Including Sound Propagation in Real Pipe Flows
(Doctoral thesis, 2023-10-20)Ultralyd mengdemålere av typen Ultrasonic Transit-Time Flowmeters (UTTF) og deres modellering er hovedfokus i denne avhandlingen. UTTF kan kategoriseres i clamp-on og inline-målere avhengig av behovene til applikasjoner ... -
Hybrid visibility compositing and masking for illustrative rendering
(Peer reviewed; Journal article, 2010-08)In this paper, we introduce a novel framework for the compositing of interactively rendered 3D layers tailored to the needs of scientific illustration. Currently, traditional scientific illustrations are produced in a ... -
Hybrids between common and Antarctic minke whales are fertile and can back-cross
(Peer reviewed; Journal article, 2013-04-15)Background: Minke whales are separated into two genetically distinct species: the Antarctic minke whale found in the southern hemisphere, and the common minke whale which is cosmopolitan. The common minke whale is further ... -
Hydratdannelse og metanproduksjon fra gasshydrat - produksjonsmetoder og resistivitetsutvikling
(Master thesis, 2009-11-20)Ved høye trykk og lave temperaturer kan vannmolekyler danne strukturelle bur rundt et gjestemolekyl. Denne substansen er da i fast form og kalles hydrat. I naturlig forekomst av gasshydrat er metan det vanligste gjestemolekylet. ... -
Hydrate Formation and CH4 Production from Natural Gas Hydrates - Emphasis on Boundary Conditions and Production Methods
(Master thesis, 2009-05-13)Natural gas hydrate is a solid state of gas and water at low temperature and high pressure. Gas hydrates are known to form hydrate plugs in production line, and has thus generally been considered a problem to the oil ... -
Hydrate formation and CO2 - CH4 exchange in sandstone - An experimental study with emphasis on the role of initial brine saturation and salinity
(Master thesis, 2013-06-01)Recent research activity has demonstrated the viability of producing methane from gas hydrate bearing sediments by injecting and sequestering CO2 in a process where CO2 replace methane in gas hydrate by a process called ... -
Hydrate Monitoring using Capacitive Sensors
(Master thesis, 2013-06-02)Gas hydrates are of particular interest in petroleum industry since their formation during oil-production can be a major risk factor. Gas hydrates can block pipelines, interrupt production, and in worst case even cause ... -
Hydrate Nucleation, Growth, and Induction
(Journal article; Peer reviewed, 2020)The first stage of any phase transition is a dynamic coupling of transport processes and thermodynamic changes. The free energy change of the phase transition must be negative and large enough to also overcome the penalty ... -
Hydrate Phase Transition-Risk, Energy Potential and CO2 Storage Possibilities
(Doctoral thesis, 2022-02-11)Natural gas hydrate (NGH) can cause crucial flow assurance problems to the oil and gas industry. It is being considered as a potential vast energy resource for the world in the future. It could also potentially provide a ... -
Hydrate Plugging and Flow Remediation during CO2 Injection in Sediments
(Journal article; Peer reviewed, 2020)Successful geological sequestration of carbon depends strongly on reservoir seal integrity and storage capacity, including CO2 injection efficiency. Formation of solid hydrates in the near-wellbore area during CO2 injection ... -
Hydrate Production Philosophy and Thermodynamic Calculations
(Journal article; Peer reviewed, 2020)The amount of energy in the form of natural gas hydrates is huge and likely substantially more than twice the amount of worldwide conventional fossil fuel. Various ways to produce these hydrates have been proposed over the ... -
Hydro-mechanical simulation and analysis of induced seismicity for a hydraulic stimulation test at the Reykjanes geothermal field, Iceland
(Journal article; Peer reviewed, 2021)The combination of seismic analysis with advanced physics-based simulation provides an opportunity to further understand injection-induced fault reactivation, including the hydro-mechanical interplay between different ... -
Hydrocarbon migration in the Utsira High area
(Master thesis, 2021-01-29) -
Hydroclimate variability was the main control on fire activity in northern Africa over the last 50,000 years
(Journal article; Peer reviewed, 2022)North Africa features some of the most frequently burnt biomes on Earth, including the semi-arid grasslands of the Sahel and wetter savannas immediately to the south. Natural fires are fuelled by rapid biomass production ...