Fakultet for naturvitenskap og teknologi: Nye registreringer
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Reconstruction of the bottom current strength of overflow water through the Faeroe-Shetland Channel in relation to climate change during the last 135,000 years
(Master thesis; Mastergradsoppgave, 2018-05-15)The focus of this thesis was to reconstruct the bottom current strength around the Faeroe Islands and relate it to the climate variability over the past 35,000 - 135,000 years and the Holocene, using the piston core, JM11-FI-19PC, from the North-eastern shelf of the Faeroe Islands. The core location is ideal for measuring the overflow from the Nordic Seas, as it is strategically placed on top of the ... -
Late Miocene Ice Rafting in the Iceland Sea. Evidence from coarse fraction analysis of ODP Site 907
(Master thesis; Mastergradsoppgave, 2018-05-15)A high-resolution sedimentary record from ODP Leg 151 Hole 907A has been investigated with sedimentological and geochemical methods to study the paleoenvironmental evolution of the Iceland Sea over a 1-Myr time interval in the Late Miocene. Climate deterioration characterizes the Neogene period, culminating in a transition to bipolar glaciations in the Late Pliocene (Thiede and Myhre, 1996). Ice ... -
Measuring Wind Using the Internal Stabilisation System of a Quadrotor Drone
(Master thesis; Mastergradsoppgave, 2018-05-15)This thesis proposes a method of measuring wind using the data logged by the autopilot of a quadrotor drone. The approach is fundamentally different from other attempts found in the literature. Theoretical equations from works on quadrotor control are utilised and supplemented to form the theoretical framework. Static thrust tests provide the necessary parameters for calculating wind estimates. ... -
Combination of large and small basis sets in electronic structure calculations on large systems
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-04)Two basis sets-a large and a small one-are associated with each nucleus of the system. Each atom has its own separate one-electron basis comprising the large basis set of the atom in question and the small basis sets for the partner atoms in the complex. The perturbed atoms in molecules and solids model is at core of the approach since it allows for the definition of perturbed atoms in a system. It ... -
Subaperture analysis of polarimetric SAR data for iceberg detection
(Konferansebidrag; Conference object, 2016-11-03)This paper is focused on investigations of the improved detection of icebergs in open water using spectral analysis of polarimetric SAR data. The objectives of this study are to analyze the behavior of ice objects in open water using the sublook cross-correlation magnitude (SCM). It is shown that there is an improvement of iceberg-sea contrast when the SCM is used instead of multilook intensities ... -
Cross-Correlation Between Polarization Channels in SAR Imagery Over Oceanographic Features
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-05-11)This letter discusses cross-correlation features de- rived from near-coincident RADARSAT-2 quad-polarimetric and RISAT-1 hybrid-polarity (HP) measurements collected during the NOrwegian Radar oil Spill Experiment in 2015 (NORSE2015). We show that the imaginary part of the cross-correlation between RH and RV is an HP parallel to the real part of the cross-correlation between HH and VV earlier ... -
Is a net life cycle balance for energy and materials achievable for a zero emission single-family building in Norway?
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-03-01)In this study, the objective is to redesign a previous concept for a single-family Zero greenhouse gas Emission Building (ZEB). The concept is redesigned based on comparing greenhouse gas (GHG) emission loads and compensation from different design solutions applied in Norwegian single-family ZEB pilot buildings and selected sensitivity studies. The objective is to see if a previously developed ZEB ... -
3,4-Dihydroquinoxalin-2-ones: recent advances in synthesis and bioactivities
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-04-26)A summary of recent synthesis approaches to 3,4-dihydroquinoxaline-2-ones is discussed herein along with highlights of biological activity. The synthetic approaches include access to enantiopure heterocycles from chiral pool amino acids via coupling/cyclization, Michael addition/cyclization cascades, 3,3-disubstituted systems from multicomponent couplings, Bargellini reaction or photochemical ... -
Carbon Nanotube Spectrally Selective Solar Absorbers
(Journal article; Tidsskriftartikkel; Peer reviewed, 2015)The use of multi-walled carbon nanotubes (MWCNTs) as spectrally selective solar thermal absorbers (SSA) in solar thermal collectors is presented in this paper. CNT layers were coated by electrophoretic deposition (EPD) on aluminum substrates. Stable aqueous CNT suspensions consisted of multi-walled CNTs, DI water and surfactant was used for EPD. The deposited samples were heat treated in a tube ... -
Complementary biomarker-based methods for characterising Arctic sea ice conditions: A case study comparison between multivariate analysis and the PIP25 index
(Journal article; Tidsskriftartikkel; Peer reviewed, 2017-11-10)The discovery of IP25 as a qualitative biomarker proxy for Arctic sea ice and subsequent introduction of the so-called PIP25 index for semi-quantitative descriptions of sea ice conditions has significantly advanced our understanding of long-term paleo Arctic sea ice conditions over the past decade. We investigated the potential for classification tree1 (CT) models to provide a further approach ... -
Numerical Simulation of Microwave Scattering from Sea Ice Based on The Finite Element Method
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-11-03)In this paper, a 2-dimensional scattering model for sea ice based on the Finite Element Method (FEM) is presented. The scattering problem is formulated following a physics-separate strategy. The wave in the air domain is expressed by the scattered field formulation, while the wave in the sea ice domain is expressed by the total field formulation. The two separate physics and formulations are coupled ... -
Geometriske og kinematiske studier av post-kaledonske rift-margin forkastninger og bruddsett mellom Tjeldsundet og Bjarkøy, Sør-Troms.
(Master thesis; Mastergradsoppgave, 2018-05-15)Dette studiet har fokus på analyse og korrelasjon av post-kaledonske riftstrukturer i nordre Nordland og Sør-Troms, hvor målet er å sammenligne antatte paleozoiske og mesozoiske sprø forkastninger på land med lignende strukturer på havbunnen og i fjorder og sund. Ved bruk av høyoppløselige digitale verktøy fra land (kartverket, norgeibilder, norgei3d) og på havbunnen (mareano), tar denne masteroppgaven ... -
A combined 3D seismic and sedimentological study of the Lower Cretaceous succession in the northeastern part of the Nordkapp Basin
(Master thesis; Mastergradsoppgave, 2018-05-15)In this master’s thesis in geology, 3D seismic data and shallow stratigraphic cores were used to investigate the Lower Cretaceous succession in the central sub-basin of the Nordkapp Basin, Barents Shelf. The Lower Cretaceous is listed as a potential petroleum play model on the Barents Shelf, which makes the succession of interest for petroleum exploration. Recent studies of the have divided the ... -
Electrophoretically deposited carbon nanotube spectrally selective solar absorbers
(Journal article; Tidsskriftartikkel; Peer reviewed, 2015-11-11)Three types of carbon nanotubes(CNT) have been investigated regarding their suitability as spectrally selective solar thermal absorbers.The CNT coatings were electrophoretically deposited on aluminum substrates using kinetically stable CNT aqueous suspensions, of which two CNT aqueous suspensions (N-CNT and P-CNT suspensions) were prepared as part of this study and the third one (T-CNT suspension) ... -
A comparative study of sea clutter covariance matrix estimators
(Journal article; Tidsskriftartikkel; Peer reviewed, 2013-10-23)Estimation of the polarimetric covariance matrix is an important task in statistical modeling of sea clutter for maritime applications of polarimetric synthetic aperture radar (PolSAR) data. This work provides a comprehensive study of four covariance matrix estimators: the maximum likelihood estimators under the Gaussian distribution (G-ML) and the K distribution (K-ML), an approximation of the ... -
The role of diapiric mound structures in the overburden fluid plumbing systems of the Vøring Basin
(Master thesis; Mastergradsoppgave, 2018-05-15)The overall aim of this thesis is to better understand the development and emplacement of diapiric mound features in the Vema Dome area, located in the Vøring basin on the mid-Norwegian continental margin. Two 3D seismic surveys, ST9603R99 and BPN9601, were interpreted in this study, in order to investigate the diapiric mounds and their relationship with an underlying fluid plumbing system including ... -
Interaction of submarine tailings with natural sediments in three northern Norwegian coastal areas. Sedimentological, mineralogical and geochemical constraints
(Master thesis; Mastergradsoppgave, 2018-05-15)Submarine tailings placements (STPs) is an alternative practice of handling mine waste, which involves deposition of tailings into submarine environments. However, the environmental impacts of STPs remain poorly understood. This thesis is a contribution to improve the understanding of how submarine tailings placements interact with natural sediments. It is based on multi-proxy analyses of 10 sediment ... -
Controls on fluid-flow systems in the Loppa High, SW Barents Sea
(Master thesis; Mastergradsoppgave, 2018-05-14)The SW Barents Sea is a large hydrocarbon-prone epicontinental Sea comprised of a complex mosaic of deep sedimentary basins and structural highs. Uplift and erosion have been affecting the area on a large scale since the Cenozoic and have had a major impact on the petroleum systems in the area, resulting in spillage of hydrocarbons. The origin of the hydrocarbons are from deep source rocks, which ... -
Sedimentary processes and paleoenvironment reconstructions in fjords comprising the Bergsfjord peninsula, Northern Norway
(Master thesis; Mastergradsoppgave, 2018-05-16)Low-resolution bathymetry, high-resolution seismic data (chirp) and multi-proxy analyses of three sediment gravity cores were integrated to study sedimentary processes with the purpose of reconstructing paleoenvironments in the three north Norwegian fjords Øksfjorden, Bergsfjorden and Jøkelfjorden since the last glacial. These three fjords are located on the Bergsfjorden peninsula and surround the ... -
A sedimentological study of the Lower Cretaceous Glitrefjellet Member, Svalbard
(Master thesis; Mastergradsoppgave, 2018-05-15)Detailed facies analysis of the Early Cretaceous Helvetiafjellet Formation (Barremian-Aptian) indicates deposition during a long-term transgression. The formation has received a lot of attention in previous published papers, particularly the lowermost Festningen Member has been detailed in numerous papers. However, the uppermost Glitrefjellet Member is typically poorly exposed in outcrops, and ...