Fakultet for naturvitenskap og teknologi: Nye registreringer
Viser treff 341-360 av 5336
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Preparation of a high-coordinated-silicon-centered spiro-cyclic compound
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-06-10)Silicon compounds containing silicon–silicon bond with a variety of unusual oxidation states are quite important, because their high reactivity leads to the formation of a variety of silicon compounds. The isolation of such compounds with unusual oxidation states requires a resilient synthetic strategy. Herein, we report the synthesis of a silicon based spirocyclic compound containing a hyper-valent ... -
2-D Total Electron Content and 3-D Ionospheric Electron Density Variations During the 14 October 2023 Annular Solar Eclipse
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-18)This study investigates the ionospheric total electron content (TEC) responses in the 2‐D spatial domain and electron density variations in the 3‐D spatial domain during the annular solar eclipse on 14 October 2023, using ground‐based Global Navigation Satellite System (GNSS) observations, a novel TEC‐based ionospheric data assimilation system (TIDAS), ionosonde measurements, and satellite in ... -
SARS-CoV2 Nsp1 is a metal-dependent DNA and RNA endonuclease
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-28)Over recent years, we have been living under a pandemic, caused by the rapid spread of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV2). One of the major virulence factors of Coronaviruses is the Non-structural protein 1 (Nsp1), known to suppress the host cells protein translation machinery, allowing the virus to produce its own proteins, propagate and invade new cells. To ... -
The Value of Sentinel-1 Ocean Wind Fields Component for the Study of Polar Lows
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-10-10)Polar lows can pose serious threats to maritime operations and coastal communities in polar regions, especially due to their extreme wind speeds. The accurate and reliable representation of their wind field thus plays a crucial role in forecasting and mitigating the risks associated with this phenomenon. This study aims to evaluate the value of the SAR-based Sentinel-1 Ocean Wind Field product ... -
Morphological analysis of mass-transport deposits in Cenozoic sediments at the Southern Vøring Margin
(Mastergradsoppgave; Master thesis, 2024-08-30)This thesis builds an evolutionary history of recent times for a region of the Southern Vøring margin west of the Vigrid Syncline, focusing mainly on the morphological traits of mass-transport complexes and selected internal structures. The scenario covers the last 0.8 million years, the three later periods of Naust time. Preliminary research was done on pertinent geological processes and features ... -
Linking ship-associated emissions and resource development in the Arctic: Trends and predictions along the Northern Sea Route
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-08-09)Arctic ship traffic has increased significantly due to continuous sea ice loss and resource extraction. The shipping sector is an important contributor to atmospheric emissions of nitrogen oxides (NO<sub>x</sub>) and sulphur dioxide (SO<sub>2</sub>), and an increase in ship activity will lead to significant increases in these emissions. However, there is a lack of studies linking ship activities and ... -
Some issues related to the Svalbardian tectonic event (Ellesmerian Orogeny) in Svalbard
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-07-23)Svalbard has long been thought to represent the easternmost realm of the Ellesmerian Orogeny in the late Devonian or early Mississippian (Svalbardian tectonic event). Several authors do not agree and present alternative interpretations of the observed structures in older and more recent articles. This article discusses a number of issues that, in our opinion, are not sufficiently considered in ... -
Strukturforståelse av abc-formelen
(Mastergradsoppgave; Master thesis, 2024-08-15)Denne kvalitative studien handler om å undersøke hvorvidt et undervisningsopplegg som vektlegger sammenhengen mellom geometri og algebra i løsning av andregradslikninger, bidrar til at elevene sitter igjen med strukturforståelse av løsningsmetoden, abc-formelen. Hensikten med oppgaven var å planlegge og gjennomføre et annerledes undervisningsdesign innenfor temaet andregradslikninger i en ... -
Vurdering av åpne oppgaver i matematikk: En kvalitativ studie av hvordan tre lærere vurderer åpne oppgaver i matematikk på 10.trinn
(Mastergradsoppgave; Master thesis, 2024-08-14)Etter innføringen av Læreplanverket for Kunnskapsløftet i 2020 (LK20) har åpne oppgaver fått en større plass i matematikkfaget, noe som kommer til syne både på halvårsvurderinger utviklet av ulike forlag og på eksamensoppgaver i matematikk for 10. trinn. Mine erfaringer fra praksisperioder i studietiden har gjort meg oppmerksom og nysgjerrig på hvordan åpne oppgaver vurderes. Denne masterstudien ... -
LSNetv2: Improving weakly supervised power line detection with bipartite matching
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-24)This paper addresses the crucial task of power line detection and localization in electrical infrastructure inspection using Unmanned Aerial Vehicles (UAVs) from weak supervision, polyline annotations. We first identify several limitations in the state-of-the-art approach LSNet. In particular, the inability of LSNet to detect line-crossings and lines in close proximity. To overcome these limitations, ... -
A review of information sources and analysis methods for data driven decision aids in child and adolescent mental health services
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-05-13)Objective: Clinical data analysis relies on effective methods and appropriate data. Recognizing distinctive clinical services and service functions may lead to improved decision-making. Our first objective is to categorize analytical methods, data sources, and algorithms used in current research on information analysis and decision support in child and adolescent mental health services (CAMHS). ... -
Generating and grading 34 optimised norm-conserving Vanderbilt pseudopotentials for actinides and super-heavy elements in the PseudoDojo
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-07)In the last decades, material discovery has been a very active research field driven by the need to find new materials for many different applications. This has also included materials with heavy elements, beyond the stable isotopes of lead, as most actinides exhibit unique properties that make them useful in various applications. Furthermore, new heavy elements beyond actinides, collectively referred ... -
Tinned: A symbolic library for response theory and high-order derivatives
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-05-23)A symbolic C++ library—Tinned—has been developed for symbolic differentiation and manipulation in response theory. By recognizing different key building blocks in the density matrix-based (Thorvaldsen et al., J. Chem. Phys. 2008, 129, 214108) and coupled-cluster response theories, we have implemented their corresponding C++ symbolic classes, including but not limited to one- and two-electron ... -
pNNCLR: Stochastic pseudo neighborhoods for contrastive learning based unsupervised representation learning problems
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-05-11)Nearest neighbor (NN) sampling provides more semantic variations than predefined transformations for selfsupervised learning (SSL) based image recognition problems. However, its performance is restricted by the quality of the support set, which holds positive samples for the contrastive loss. In this work, we show that the quality of the support set plays a crucial role in any nearest neighbor based ... -
Long-term performance evaluation of VCRS-based atmospheric water generation in arid climates
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-07-14)The paper evaluates the EW-1000 Atmospheric Water Generation-Vapor Compression Refrigeration system (AWG-VCRS) as a sustainable alternative to seawater desalination in the GCC. Conducted in Masdar City, Abu Dhabi, from July 2023 to January 2024, the study measured temperature, humidity, energy consumption, and water production. Key findings include a peak water production of 1500 LPD in September ... -
Data note for gender perspectives on a flipped classroom environment
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-08-20)The present paper is a data note related to the paper “Gender perspectives on a flipped classroom environment”. The paper drew on an in-depth analysis of the interview with a single female student called Sofia and attempted to analyze different gender related interactions between students in group work situations experienced by this student. The transcript from this interview was translated from ... -
Using One App Only – Collecting a Comprehensive Set of Health-Related Data for Prevention of Chronic Conditions
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024)This paper presents the design, implementation and early tests of an app that collects a comprehensive set of health-related data, as part of the EU-project WARIFA. To achieve the main aim of the project – using AI to prevent chronic conditions – a wide range of data needs to be collected and stored at a backend server for processing. The methods and elements for creating this system are presented, ... -
Control-Driven Media: A Unifying Model for Consistent, Cross-platform Multimedia Experiences
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024)Many media providers offer complementary prod-ucts on different platforms to target a diverse consumer base. Online sports coverage, for instance, may include professionally produced audio and video channels, as well as Web pages and native apps offering live statistics, maps, data visualizations, social commentary and more. Many consumers also engage in parallel usage, setting up streaming products ... -
Metallogenic model of the Lykling ophiolite-hosted lode Au deposit, Scandinavian Caledonides: Insight from fluid inclusions, mineral chemistry and stable isotope geochemistry
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-09-10)The Lykling lode Au deposit represents a unique example of gold mineralization in the Upper Allochthone of the Scandinavian Caledonides. The mineralization is hosted by the Early Ordovician Lykling Ophiolite Complex and the intruding trondhjemite unit and spatially associated with two generations of mafic dykes that crosscut both the ophiolitic complex and trondhjemite. Field observations indicate ... -
Droplet characterization of a pressure-swirl atomizer by means of high-fidelity modelling based on DNS simulations
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-10-31)Liquid injection optimization is key to enhance the efficiency of many processes in a wide variety of fields. Combustion processes are one of the most challenging ones, due to the direct emissions and greenhouse gases implications. This work aims at studying the external two-phase flow produced when injecting fuel with a pressure-swirl atomizer in an operating condition typical of an academic ...