Fakultet for naturvitenskap og teknologi: Nye registreringer
Viser treff 1201-1220 av 5306
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Droner som FKT - bruk av droner som forebyggende tiltak i beitenæringen
(Research report; Forskningsrapport, 2023)Utmarksbeitende dyr er utsatt for angrep fra fredet rovvilt. I oppdrag fra rovviltnemnda i region 6 Midt-Norge undersøker vi den mulige nytteverdien av droner i åpen kategori som forebyggende- og konfliktdempende tiltak (FKT). Utredningen er basert på informasjon fra intervjuer, faglitteratur og dronetestflygninger.Droner som FKT kan brukes under (1) tilsyn, (2) flytting av dyr fra rovdyrutsatte ... -
En analyse av vindkraftens og kraftutvekslingens betydning for effektkjøring av norske magasinkraftverk
(Research report; Forskningsrapport, 2023)Effektkjøring av magasinkraftverk er hurtige og store variasjoner i vannføring og produsert effekt. Spesielt kan store variasjoner innenfor et tidsrom på et døgn føre til tilsvarende variasjoner i vannstand i nedstrøm vassdrag og som kan føre til skader på livet i elva. Det er en gjengs oppfatning at et stort innslag av intermitterende, ikke-regulerbare kraftkilder som vindkraft, vil føre til hardere ... -
Automatisk rettet eksamen i generell kjemi
(Conference object; Konferansebidrag, 2023-03)En god avsluttende eksamen vurderer i hvilken grad intendert læringsutbytte har blitt oppnådd på en nøye, objektiv og reproduserbar måte. Det er imidlertid lite tilfredsstillende hvis en faglærer bruker mye tid på vurdering avlæring framfor vurdering forlæring underveis i semesteret. Derfor kan det være attraktivtå utforske muligheter med en digital automatisk rettet ... -
Label-free superior contrast with c-band ultra-violet extinction microscopy
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-03-03)In 1934, Frits Zernike demonstrated that it is possible to exploit the sample’s refractive index to obtain superior contrast images of biological cells. The refractive index contrast of a cell surrounded by media yields a change in the phase and intensity of the transmitted light wave. This change can be due to either scattering or absorption caused by the sample. Most cells are transparent at visible ... -
Distinct modes of meltwater drainage and landform development beneath the last Barents Sea ice sheet
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-04-18)The flow of glacial ice is impacted by basal meltwater drainage systems that fluctuate on a continuum from distributed, high-pressure environments to channelized, lower pressure networks. Understanding the long-term development of dominant drainage modes and impacts on ice flow and landform development is a crucial step in predicting palaeo and contemporary ice-mass response to changes in ... -
Rapid prototyping of 1xN multifocus gratings via additive direct laser writing
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-04-05)Multifocus gratings (MFGs) enable microscopes and other imaging systems to record entire Z-stacks of images in a single camera exposure. The exact grating shape depends on microscope parameters like wavelength and magnification and defines the multiplexing onto a grid of MxN Z-slices. To facilitate the swift production and alteration of MFGs for a system and application at hand, we have developed ... -
Deep Semi-Supervised Semantic Segmentation in Multi-Frequency Echosounder Data
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-02-01)Multi-frequency echosounder data can provide a broad understanding of the underwater environment in a non-invasive manner. The analysis of echosounder data is, hence, a topic of great importance for the marine ecosystem. Semantic segmentation, a deep learning based analysis method predicting the class attribute of each acoustic intensity, has recently been in the spotlight of the fisheries and aquatic ... -
A Self-Configuration Controller To Detect, Identify, and Recover Misconfiguration At IoT Edge Devices and Containerized Cluster System
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023)Securing workloads and information flow against misconfiguration in container-based clusters and edge medical devices is an important part of overall system security. This paper presented a controller that analyzes the misconfiguration, maps the observation to its hidden misconfiguration type, and selects the optimal recovery policy to maximize the performance of defined metrics. In the future, we ... -
Arc-like magmatism in syn- to post-collisional setting: The Ediacaran Angra Fria Magmatic Complex (NW Namibia) and its cross-Atlantic correlatives in the south Brazilian Florianópolis Batholith
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-27)Ediacaran syn-tectonic plutonic rocks (amphibole gabbros, quartz diorites/tonalites to biotite- and muscovite-bearing granites) of the Angra Fria Magmatic Complex (Kaoko Belt, north-western Namibia) belong to two compositionally similar, magnesian, transitional tholeiitic–calc-alkaline suites, the Older (∼625–620 Ma) and the Younger (∼585–575 Ma). Both have counterparts in the broadly contemporaneous ... -
Including patient-generated health data in electronic health records – a solution for CGM-data
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023)Patients with diabetes and health personnel do not have an optimal way of interacting. Health personnel must use multiple ICT systems, such as third-party companies’ services, to access health-related data from diverse vendors’ CGM platforms and Electronic Health Record (EHR). Furthermore, other health-related data like physical activities, quality of life or well-being is often discussed but ... -
Studentaktiv læring med store studentgrupper – fordeler og ulemper med gruppediskusjon i pollbasert undervisning
(Conference object; Konferansebidrag, 2023-03)To viktige prinsipper for å øke studentenes læring i undervisning er aktiv deltagelse og formativ vurdering. Innføring av disse prinsippene i undervisning med store studentgrupper kan imidlertid by på utfordringer. Løsningen kan være å bruke flervalgsoppgaver i undervisningen med påfølgende formativ vurdering av faglæreren, en undervisningsform som vi her kaller pollbasert undervisning. I dette ... -
Exploring the Behavior of Open-Source Diffusion Model Inpainting Algorithms
(Master thesis; Mastergradsoppgave, 2023-01-26)The present study aimed to examine the performance of an open-source diffusion model inpainting algorithm under varying conditions of inpainting strength and mask radius. However, the results obtained were unexpected and raise significant concerns. Our findings indicate that the algorithm not only modifies the pixels within the designated mask, as intended, but also alters pixels out side of the ... -
How much are you able to make your students learn? A study of the knowledge gain of students with high learning potential in the course of a teaching setup on wireless communication
(Master thesis; Mastergradsoppgave, 2022-06-09)This master thesis presents looks into how much knowledge can with high learning potential student gain from a tailored teacher setup. An tailored teaching program was created within the theme wireless communication and the data was collected mainly form an anonymous pre and post-test from four diffident subject groups from which the knowledge gain value g was calculated. The knowledge gain takes ... -
Evidence of Arctic methane emissions across the mid-Pleistocene
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-04-08)During the Pleistocene, Earth’s climate changed dramatically. The mid-Pleistocene transition (MPT; ~1.3–0.7 million years (Ma)) featured an important ice volume increase at both poles. The evolution of large Arctic ice sheets caused the sequestration of methane as free gas and hydrates in subseabed sediments. Ice volume changes, associated with variable pressures and temperatures, perturbed those ... -
Seismic characterization and source rock evaluation of Lower Cretaceous organic-rich units on the Norwegian Continental Shelf
(Doctoral thesis; Doktorgradsavhandling, 2023-04-20)Across the Norwegian Continental Shelf (NCS), the Upper Jurassic organic-rich shales are considered the main source rock unit charging most of the largest producing oil and gas fields. However, despite its extensive distribution across the NCS, this source rock unit is overmature and spent in the deep Cretaceous basins on the mid-Norwegian margin and the SW Barents Shelf. Documenting the presence ... -
Raman-spectroscopy and of optically trapped nanoparticles
(Mastergradsoppgave; Master thesis, 2022-11-06)The present work begins a large layer of experiments on the study of Raman radiation from extracellular vesicles. It is a promising method that provides unique information about the global biomolecular composition of a single vesicle or a small number of vesicles. Two physical phenomena are present in this work, Raman scattering and optical trapping. In Raman scattering, the scattered radiation ... -
HgCl2 addition to pore water samples from cold seeps can affect the geochemistry of dissolved inorganic carbon ([DIC], δ13CDIC)
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-04-03)The conventional use of mercuric chloride (HgCl<sub>2</sub>) as an antimicrobial agent in water samples for dissolved inorganic carbon (DIC) analysis poses health and environmental risks related to its handling and disposal. Even though there is an increasing interest in quantifying pore water DIC contribution to the ocean carbon cycle and deep-sea acidification, the paucity of comparative studies ... -
Widespread natural methane and oil leakage from sub-marine Arctic reservoirs
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-03-30)Parceling the anthropogenic and natural (geological) sources of fossil methane in the atmosphere remains problematic due to a lack of distinctive chemical markers for their discrimination. In this light, understanding the distribution and contribution of potential geological methane sources is important. Here we present empirical observations of hitherto undocumented, widespread and extensive methane ... -
The effect of muscovite on the microstructural evolution and rheology of quartzite in general shear
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-03-13)We conducted general shear experiments on synthetic mixtures of quartz and muscovite aggregates at 800 °C and 1.5 GPa with 0.1 wt% H<sub>2</sub>O added in the Griggs apparatus to investigate the role of muscovite content on the microstructural evolution and rheological properties of quartz aggregates. Muscovite content varied between 0, 5, 10 and 25% muscovite. Mechanically, the sample strengths ... -
On the Exploitation of Heterophily in Graph-Based Multimodal Remote Sensing Data Analysis
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022)The field of Earth observation is dealing with increasingly large, multimodal data sets. An important processing step consists of providing these data sets with labels. However, standard label propagation algorithms cannot be applied to multimodal remote sensing data for two reasons. First, multimodal data is heterogeneous while classic label propagation algorithms assume a homogeneous network. ...