Fakultet for naturvitenskap og teknologi: Nye registreringer
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Exploration of New Biomass-Derived Solvents: Application to Carboxylation Reactions
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-01-07)A range of hitherto unexplored biomass‐derived chemicals have been evaluated as new sustainable solvents for a large variety of CO<sub>2</sub>‐based carboxylation reactions. Known biomass‐derived solvents (biosolvents) are also included in the study and the results are compared with commonly used solvents for the reactions. Biosolvents can be efficiently applied in a variety of carboxylation reactions, ... -
User Expectations and Willingness to Share Self-collected Health Data
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020)The rapid improvement in mobile health technologies revolutionized what and how people can self-record and manage data. This massive amount of information accumulated by these technologies has potentially many applications beyond personal need, i.e. for public health. A challenge with collecting this data is to motivate people to share this data for the benefit of all. The purpose of this study is ... -
Semi-CNN architecture for effective spatio-temporal Learning in action recognition
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-01-12)This paper introduces a fusion convolutional architecture for efficient learning of spatio-temporal features in video action recognition. Unlike 2D convolutional neural networks (CNNs), 3D CNNs can be applied directly on consecutive frames to extract spatio-temporal features. The aim of this work is to fuse the convolution layers from 2D and 3D CNNs to allow temporal encoding with fewer parameters ... -
User Expectations and Willingness to Share Self-Collected Health Data
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020)The rapid improvement in mobile health technologies revolutionized what and how people can self-record and manage data. This massive amount of information accumulated by these technologies has potentially many applications beyond personal need, i.e. for public health. A challenge with collecting this data is to motivate people to share this data for the benefit of all. The purpose of this study is ... -
What Do We Know About the Use of Chatbots for Public Health?
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020)<i>Background and objective</i>: The number of publications on the use of chatbots for health is recently increasing, however to our knowledge, there are no publications summarizing what is known about using chatbots for public health yet. The objective of this work is to provide an overview of the existing scientific literature on the use of chatbots for public health, for which purpose have chatbots ... -
The Compliance Challenges in Emissions Control Regulations to Reduce Air Pollution from Shipping
(Peer reviewed; Chapter; Bokkapittel, 2019-10-14)One of the thorny problems perplexing the maritime industry is to comply with existing and soon-to-be-enacted regulations towards emissions reduction from shipping. This problem has been discussed in this study under three viewpoints: i) the marine engine efficiency, ii) the decision-making process for selecting the technologies for reducing air emissions from shipping and iii) the challenges in the ... -
Homogeneous Levi non-degenerate hypersurfaces in C^3
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-09)We classify all (locally) homogeneous Levi non-degenerate real hypersurfaces in C<sup>3</sup> with symmetry algebra of dimension ≥6. -
Formal C-H carboxylation of unactivated arenes with carbon dioxide
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-01-31)A formal C−H carboxylation of unactivated arenes using CO<sub>2</sub> in green solvents is described. The present strategy combines a sterically controlled Ir‐catalyzed C−H borylation followed by a Cu‐catalyzed carboxylation of the in situ generated organoboronates. The reaction is highly regioselective for the C−H carboxylation of 1,3‐disubstituted and 1,2,3‐trisubstituted benzenes, 1,2‐ or ... -
Higher Weight Spectra of Veronese Codes
(Journal article; Tidsskriftartikkel; Peer reviewed, 2019-10-18)We study q-ary linear codes C obtained from Veronese surfaces over finite fields.We show how one can find the higher weight spectra of these codes, or equivalently, the weight distribution of all extension codes of C over all field extensions of the ground field. Our methods will be a study of the Stanley-Reisner rings of a series of matroids associated to each code C. -
Sampling moiré method: a tool for sensing quadratic phase distortion and its correction for accurate quantitative phase microscopy
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-03-24)The advantages of quantitative phase microscopy (QPM) such as label-free imaging with high spatial sensitivity, live cell compatibility and high-speed imaging makes it viable for various biological applications. The measurement accuracy of QPM strongly relies on the shape of the recorded interferograms, whether straight or curved fringes are recorded during the data acquisition. Moreover, for a ... -
Anthropocene rockfalls travel farther than prehistoric predecessors
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-09-02)Human modification of natural landscapes has influenced surface processes in many settings on Earth. Quantitative data comparing the distribution and behavior of geologic phenomena before and after human arrival are sparse but urgently required to evaluate possible anthropogenic influences on geologic hazards. We conduct field and imagery-based mapping, statistical analysis, and numerical modeling ... -
Automatic fringe pattern enhancement using truly adaptive period-guided bidimensional empirical mode decomposition
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-02-19)Fringe patterns encode the information about the result of a measurement performed via widely used optical full-field testing methods, e.g., interferometry, digital holographic microscopy, moiré techniques, structured illumination etc. Affected by the optical setup, changing environment and the sample itself fringe patterns are often corrupted with substantial noise, strong and uneven background ... -
Sub-nanometer height sensitivity by phase shifting interference microscopy under environmental fluctuations
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-03-18)Phase shifting interferometric (PSI) techniques are among the most sensitive phase measurement methods. Owing to its high sensitivity, any minute phase change caused due to environmental instability results into, inaccurate phase measurement. Consequently, a well calibrated piezo electric transducer (PZT) and highly-stable environment is mandatory for measuring accurate phase map using PSI implementation. ... -
Measuring Wind Speed Using the Internal Stabilization System of a Quadrotor Drone
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-16)This article proposes a method of measuring wind speed using the data logged by the autopilot of a quadrotor drone. Theoretical equations from works on quadrotor control are utilized and supplemented to form the theoretical framework. Static thrust tests provide the necessary parameters for calculating wind estimates. Flight tests were conducted at a test site with laminar wind conditions with the ... -
Two-photon absorption in host-guest complexes
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-17)We present an extensive analysis of one- and two-photon absorption processes in some organic host-guest (H-G) complexes using linear and quadratic response theory within the framework of time-dependent density functional theory. For this purpose, we have considered all possible 20 host-guest complexes constructed from 4 host and 5 guest molecules. We have analysed how the one- and two-photon activity ... -
Electron heating by HF pumping of high-latitude ionospheric F-region plasma near magnetic zenith
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-03-06)High-frequency electromagnetic pumping of ionospheric F-region plasma at high and mid latitudes gives the strongest plasma response in magnetic zenith, antiparallel to the geomagnetic field in the Northern Hemisphere. This has been observed in optical emissions from the pumped plasma turbulence, electron temperature enhancements, filamentary magnetic field-aligned plasma density irregularities, and ... -
MusiJ: an ImageJ plugin for video nanoscopy
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-04-14)We present an open-source implementation of the fluctuation-based nanoscopy method MUSICAL for ImageJ. This implementation improves the algorithm’s computational efficiency and takes advantage of multi-threading to provide orders of magnitude faster reconstructions than the original MATLAB implementation. In addition, the plugin is capable of generating super-resolution videos from large stacks of ... -
Superimposed macro- and mesoscale folds, and their relation to ductile shear zones in the Karasjok Greenstone Belt, Finnmark, Norway
(Master thesis; Mastergradsoppgave, 2020-06-05)The Karasjok Greenstone Belt (KGB) is a N-S trending supracrustal belt in Northern Norway. The KGB may comprise economically important mineral resources. Thus, a better understanding of ore genesis and structural architecture is key information for future exploration. The purpose of this master thesis is to perform detailed structural analysis based on field work in the northern part of KGB. Field ... -
Comparison of deep learning models for multivariate prediction of time series wind power generation and temperature
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-03-02)Wind power experienced a substantial growth over the past decade especially because it has been seen as one of the best ways towards meeting climate change and emissions targets by many countries. Since wind power is not fully dispatchable, the accuracy of wind forecasts is a key element for the electric system operators, as it strongly affects the decision-making processes. The planning horizon can ... -
Long-lasting Cadomian magmatic activity along an active northern Gondwana margin: U–Pb zircon and Sr–Nd isotopic evidence from the Brunovistulian Domain, eastern Bohemian Massif
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-11-03)Cadomian magmatic complexes of the Brunovistulian Domain crop out at the eastern termination of the Bohemian Massif. However, the age, nature and geotectonic affinity of some of pre-Variscan (meta-)igneous rock complexes from this domain are still unknown. Geochronological and geochemical study of the granitic rocks across the Brunovistulian Domain reveals new information about the timing and nature ...