Fakultet for naturvitenskap og teknologi: Nye registreringer
Viser treff 3021-3040 av 5336
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User Satisfaction in Augmented Reality-Based Training Using Microsoft HoloLens
(Journal article; Peer reviewed, 2019-01-25)<p>With the recent developments in augmented reality (AR) technologies comes an increased interest in the use of smart glasses for hands-on training. Whether this interest is turned into market success depends at the least on whether the interaction with smart AR glasses satisfies users, an aspect of AR use that so far has received little attention. <p>With this contribution, we seek to change ... -
The effect of human factors on safety related to barrier management
(Master thesis; Mastergradsoppgave, 2019-05-31)The aim of this thesis is to establish information on barrier elements where human errors take place and to establish proactive measures to eliminate these errors. The three main objectives for this project is to review the current safety and barrier management approach in Equinor, identify to what degree human factors have an impact on safety and make recommendations for improvements on safety and ... -
The Cruise Industry and the Polar Code. Implementing the Polar Code.
(Master thesis; Mastergradsoppgave, 2019-05-31)The mandatory Polar Code is now set into force with strengthened requirements for vessels operating in polar waters. There are many challenges, and the polar environment adds an increased risk level. The preventive actions towards mitigating risks are more important due to the harsh environment, long distances and limited options for assistant rescue. Most accidents and incidents have pre-occurring ... -
The Permafrost Young Researchers Network (PYRN) is getting older – the past, present, and future of our evolving community
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-02-07)A lasting legacy of the International Polar Year (IPY) 2007–2008 was the promotion of the Permafrost Young Researchers Network (PYRN), initially an IPY outreach and education activity by the International Permafrost Association (IPA). With the momentum of IPY, PYRN developed into a thriving network that still connects young permafrost scientists, engineers, and researchers from other disciplines. ... -
Variability of Acoustically Evidenced Methane Bubble Emissions Offshore Western Svalbard
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-07-22)Large reservoirs of methane present in Arctic marine sediments are susceptible to rapid warming, promoting increasing methane emissions. Gas bubbles in the water column can be detected, and flow rates can be quantified using hydroacoustic survey methods, making it possible to monitor spatiotemporal variability. We present methane (CH<sub>4</sub>) bubble flow rates derived from hydroacoustic data ... -
A study of the incidence and mortality hazard rate of myocardial infarction in Tromsø
(Master thesis; Mastergradsoppgave, 2019-05-31)This thesis uses data from the Tromsø Study and weather data from the Norwegian Meteorological Institute to study the mortality hazard rate and incidence rate of myocardial infarction (MI) in Tromsø using a latent Gaussian modelling framework. Inference is performed using integrated nested Laplace approximations (INLA). This thesis presents the datasets and describes the modelling and computational ... -
Generating polytopes from Coxeter groups
(Master thesis; Mastergradsoppgave, 2019-05-31)The main goal of this thesis is to study finite reflection groups (Coxeter groups) W and to use these to generate polytopes in two and three dimensions. Such polytopes will be generated as the convex hull of the W-orbit through an initial point. We prove an efficient recipe for finding the stabilizer of an initial point, and examine several examples of such polytopes and illustrate how many vertices, ... -
Bayesian analysis of the occurrence of myocardial infarction in the LGM framework
(Master thesis; Mastergradsoppgave, 2019-05-21)The goal of this thesis is analyse the incidence rate of the first ever myocardial infarction (MI) and the survival time after the MI. The data used for this purpose is from the Troms\o{} study surveys collected in the period from 1974 to 2008. This thesis provides a general introduction to latent Gaussian models and the methodology of integrated nested Laplace approximation. Specifically, the data ... -
Ut på tur, aldri sur(r)! - Når turopplevelser blir en del av å beskrive grafer
(Master thesis; Mastergradsoppgave, 2019-05-29)Denne masteroppgaven er et multiple case-studie av elever fra to 10.klasser. Formålet med studien er å undersøke om elevene uttrykker autonomi i undervisningstimene der de arbeider med et undersøkende undervisningsopplegg. Bakgrunnen for valg av problemstilling er det nye læreplanverket som trer i kraft i 2020, der tilrettelegging for dybdelæring står i fokus. Oppgaven presenterer både matematisk ... -
Elevers forståelse av lineære likninger. En kvalitativ studie av elevers arbeid med én tradisjonell og én utforskende oppgave i matematikk
(Master thesis; Mastergradsoppgave, 2019-05-29)Hensikten med denne studien er å få bedre forståelse av hvilke aspekter ved lineære likninger elever med høy måloppnåelse finner utfordrende. For å svare på dette vil oppgaven ha fokus på hvordan elever arbeider med en tradisjonell og en utforskende oppgave i matematikk. Undersøkelsen har et kvalitativt forskningsdesign og tar utgangspunkt i et kognitivt psykologisk kunnskapssyn. Datainnsamlingen ... -
Exploring N-nucleophiles for diversification of a complex cyclohexenone scaffold
(Master thesis; Mastergradsoppgave, 2019-06-05)In this thesis, synthesis of 3 different dibenzylideneacetone (DBA)-analogues and 4 different ethyl 2-oxo-6-phenyl-4-(2-phenylethenyl)-4-cyclohexene-1-carboxylate-analogues that have not been reported before were synthesized, as well as a range of analogues that have been reported before. Both symmetrical and unsymmetrical DBA-analogues were made. The yields of many of these reactions were low, but ... -
Combining the Polarizable Continuum Model with Multiresolution analysis: a cavity-free approach to solvent effects
(Master thesis; Mastergradsoppgave, 2019-06-01)Most chemical systems of interest are in solution. In this thesis we worked with a Multiwavelet (MW) basis to implement a Polarizable Continuum Model (PCM) in order to describe the environmental effects of a solvated system. We successfully implemented a SCRF procedure for solving the Generalized Poisson Equation (GPE) for a solvated system using a MW basis. We also present an early implementation ... -
Characterization of color cross-talk of CCD detectors and its influence in multispectral quantitative phase imaging
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-02-08)Multi-spectral quantitative phase imaging (QPI) is an emerging imaging modality for wavelength dependent studies of several biological and industrial specimens. Simultaneous multi-spectral QPI is generally performed with color CCD cameras. Here, we present a new approach for accurately measuring the color crosstalk of 2D area detectors, without needing prior information about camera specifications. ... -
En helhetlig forskningsprosess. En kvantitativ studie om læring av fagkunnskap i organisk kjemi gjennom praktisk arbeid
(Master thesis; Mastergradsoppgave, 2019-05-30)Praktisk arbeid har en uvurderlig og uerstattelig plass i naturfagundervisningen. Både læreplanen i kjemi og fagfornyelsen i naturfag som inntrer i 2020 beskriver fagenes praktiske aspekt som svært sentralt. Dessverre rapporter forskning fra flere hold at praktisk arbeid som undervisningsmetode ikke lever opp til sitt fulle potensial slik det blir praktisert i dag. Især viser det seg å være vanskelig ... -
Structure activity investigations of XTH inhibitors
(Master thesis; Mastergradsoppgave, 2019-05-15)XTHs (xylogclucan endotransglucosylase/hydrolases) are a group of plant enzymes that regulate xyloglucan crosslinking in cell walls and play an essential role in regulation of plant growth. It is thought that XTHs play an integral role in the way the parasitic vine plant Cuscuta is able to penetrate host plant cell walls. Parasitic higher plants are a formidable threat to agricultural production ... -
Development of a novel method for the analysis of acyl carnitine profile using liquid chromatography mass spectrometry
(Master thesis; Mastergradsoppgave, 2019-05-15)Carnitine is a low-molecular-weight compound that has an obligate role in the mitochondrial oxidation of long-chain fatty acids (acyl groups) and energy production. Therefore, acylcarnitines are essential diagnostic markers for complex diseases, fatty acid metabolism disorders, and disorders related to amino acids metabolism. Biochemical screening of the acylcarnitine profile is performed in clinical ... -
Synthesis of XTH inhibitors
(Master thesis; Mastergradsoppgave, 2019-05-15)XTH er en gruppe enzymer som ble oppdaget tidlig på 90 tallet og muligens er involvert i Cuscuta infeksjonen av tomater. En nylig studie gjort ved arktisk og marin biologi UIT viser at Brilliant Blue R250 fungerer som en god inhibitor mot disse enzymene. I dette prosjektet ble det fokusert på å syntetisere strukturelt like molekyler for å potensielt øke vannløseligheten og inhibitoraktiviteten. ... -
Discharge of Meteoric Water in the Eastern Norwegian Sea since the Last Glacial Period
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-07-03)Submarine groundwater discharge could impact the transport of critical solutes to the ocean. However, its driver(s), significance over geological time scales, and geographical coverage are poorly understood. We characterize a submarine groundwater seep from the continental slope off northern Norway where substantial amount of meteoric water was detected. We reconstruct the seepage history from ... -
Super-condenser enables labelfree nanoscopy
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-08-22)Labelfree nanoscopy encompasses optical imaging with resolution in the 100 nm range using visible wavelengths. Here, we present a labelfree nanoscopy method that combines coherent imaging techniques with waveguide microscopy to realize a <i>super-condenser</i> featuring maximally inclined coherent darkfield illumination with artificially stretched wave vectors due to large refractive indices of the ... -
Structural intermediates of a DNA-ligase complex illuminate the role of the catalytic metal ion and mechanism of phosphodiester bond formation
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-07-17)DNA ligases join adjacent 5′ phosphate (5′P) and 3′ hydroxyl (3′OH) termini of double-stranded DNA via a three-step mechanism requiring a nucleotide cofactor and divalent metal ion. Although considerable structural detail is available for the first two steps, less is known about step 3 where the DNA-backbone is joined or about the cation role at this step. We have captured high-resolution structures ...