Fakultet for naturvitenskap og teknologi: Recent submissions
Now showing items 1561-1580 of 5304
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Expectations of users and non-users of wearable sensors and mobile health applications
(Chapter; Bokkapittel, 2022-08-22)Patient self-management is vital to improved health outcomes for patients with chronic diseases. The objective of this study was to understand the role of wearable sensors in patients’ self-management. A survey encompassing factors related to motivation in mHealth was conducted. Ease of use and sensory accuracy was found most important when choosing a wearable. Manual registration of most health-related ... -
Designing an e-Health Program for Lifestyle Changes in Diabetes Care A Qualitative Pre-Study in Norway
(Chapter; Bokkapittel, 2022-08-22)Type 2 diabetes mellitus (T2D) and prediabetes prevalence rates are high. Consequences are serious, but current treatment is often not efficient for achieving remission. Remission may be achieved through lifestyle intervention. Frequent follow-up is necessary, and health care personnel (HCP) lack resources, time, and often adequate knowledge. Self-management of T2D can benefit from better use of ... -
Data collection and smart nudging to promote physical activity and a healthy lifestyle using wearable devices
(Chapter; Bokkapittel, 2022-08-22)Nudge principles and techniques can motivate and improve personal health through emerging digital devices, such as activity trackers. Tracking people's health and well-being using such devices have earned widespread interest. These devices can continuously capture and analyze health-related data from individuals and communities in their everyday environment. Providing context-aware nudges can help ... -
Proceedings of the 18th Scandinavian Conference on Health Informatics
(Book; Bok, 2022-08-22)This proceeding presents the papers presented at the 18th Scandinavian Conference on Health Informatics - SHI 2022 in Tromsø, Norway on August 22-24, 2022. -
Report From Surveys To Assess Harp And Hooded Seal Pup Production In The Greenland Sea Pack-Ice In 2022
(Research report; Forskningsrapport, 2022-06-07)Cruise no.: 2022703 : The 2022 survey of harp and hooded seal pup production in the Greenland Sea was carried out to obtain updated estimates to be used to assess current status of these two seal stocks. Since a similar survey in 2018 indicated a 40% reduction in harp seal pup production since the 2012 survey, and the continued lack of increase in pup production of the severely depleted hooded ... -
An experimental analysis of the impact of thermal protective immersion suit and angle of heel on individual walking speeds
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-04-16)Background: Incarcerated individuals have poor mental health compared to the general population. Social support has a benefcial efect on mental health. The bufering model proposes that social support facilitates coping under stressful conditions, while the main efects model suggests that belonging to social networks and having positive social interactions are benefcial for mental health. Prisons ... -
Glacially Induced Stress Across the Arctic From the Eemian Interglacial to the Present—Implications for Faulting and Methane Seepage
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-28)Strong compressive and shear stresses generated by glacial loading and unloading have a direct impact on near-surface geological processes. Glacial stresses are constantly evolving, creating stress perturbations in the lithosphere that extend significant distances away from the ice. In the Arctic, periodic methane seepage and faulting have been recurrently associated with glacial cycles. However, ... -
Smart contract formation enabling energy-as-a-service in a virtual power plant
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-10-22)Energy as a service (EaaS) is an emerging business model that enables the otherwise passive energy consumers to play an active role and participate in the energy utility services. This platform is formed through smart contracts registering peer-to-peer (P2P) transactions of energy through price and quantity. Many industries, including finance, have already leveraged smart contracts to introduce ... -
Rapid post-glacial bedrock weathering in coastal Norway
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-10-26)Quantifying bedrock weathering rates under diverse climate conditions is essential to understanding timescales of landscape evolution. Yet, weathering rates are often difficult to constrain, and associating a weathered landform to a specific formative environment can be complicated by overprinting of successive processes and temporally varying climate. In this study, we investigate three sites ... -
Data driven control based on Deep Q-Network algorithm for heading control and path following of a ship in calm water and waves
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07-06)A reinforcement learning algorithm based on Deep Q-Networks (DQN) is used for the path following and heading control of a ship in calm water and waves. The rudder action of the ship is selected based on the developed DQN model. The spatial positions, linear velocities, yaw rate, Heading Error (HE) and Cross Track Error (CTE) represent the state-space, and a set of rudder angles represents the action ... -
Resilient expansion planning of virtual power plant with an integrated energy system considering reliability criteria of lines and towers
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-25)The portfolio of virtual power plants (VPP) is a flexible system for facilitating a wide range of resources with wide geographical coverage. A VPP can be placed at the intersection of electric power and energy systems by adding heat pumps to the portfolio, thereby accelerating the formation of integrated energy systems. VPPs, while virtual, still rely on a physical network for operations. The power ... -
Thermodynamic and dynamic contributions to seasonal Arctic sea ice thickness distributions from airborne observations
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-04-18)Sea ice thickness is a key parameter in the polar climate and ecosystem. Thermodynamic and dynamic processes alter the sea ice thickness.The Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition provided a unique opportunity to study seasonal sea ice thickness changes of the same sea ice. We analyzed 11 large-scale (*50 km) airborne electromagnetic sea thickness ... -
Validation of Multistatic Meteor Radar Analysis Using Modeled Mesospheric Dynamics: An Assessment of the Reliability of Gradients and Vertical Velocities
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-28)A virtual meteor radar system based on the upper-atmosphere extension of the high-resolution ICOsahedral Non-hydrostatic general circulation model is constructed to validate multistatic specular meteor radar (SMR) analyses. The virtual radar system examines the validity of mean winds and gradients estimation techniques used in multistatic SMRs. The study is motivated by unexpected mean values and ... -
Snow detection on antenna radomes using signal processing
(Master thesis; Mastergradsoppgave, 2022-06-25)Radomes are dome-shaped covers that protect the antenna from the climate, such as rain, wind, sunlight, and snow. Even though the radomes protect the antenna from snow and ice, it does not prevent snow and ice from building up on the radome. When snow and ice build up enough on the radome, the signal passing through it loses strength. This project tries to detect snow and ice build-up on antenna ... -
Vessel operations in relation to new types of offshore aquaculture facilities, and weather windows in exposed areas
(Master thesis; Mastergradsoppgave, 2022-06-01)The marine aquaculture industry is expanding the production into new sea areas. The technology is advancing, and offshore aquaculture facilities are being developed. The offshore developments can offer significant benefits that applies to the economy, optimization of operations and production, as well as minimizing the impact on the coastal areas. Structural and operation procedures need to be ... -
Implementation of Virtual Reality (VR) simulators in Norwegian maritime pilotage training
(Master thesis; Mastergradsoppgave, 2022-06-01)With millions of tons of cargo transported to and from Norwegian ports every year, the maritime waterways in Norway are heavily used. The high consequences of accidents and mishaps require well-trained seafarers and safe operating practices. The normal crews of vessels are supported by the Norwegian Coastal Administration (NCA) pilot service when operating vessels not meeting specific ... -
Investigation of UAV related incidents and accidents
(Master thesis; Mastergradsoppgave, 2022-05-30)To this day, there is a lack of research on unmanned aerial vehicle (drone) related incidents and accidents. Knowing why these happen, what potential outcomes they may have and how to avoid them from occurring, can be crucial. There is, furthermore, potentially a lack of transparency in the unmanned aviation industry, regarding reporting of incidents. In order to prepare conclusions within one set ... -
Anodic Activity of Hydrated and Anhydrous Iron (II) Oxalate in Li-Ion Batteries
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-01-12)We discuss the applicability of the naturally occurring compound Ferrous Oxalate Dihydrate (FOD) (FeC2O4·2H2O) as an anode material in Li-ion batteries. Using first-principles modeling, we evaluate the electrochemical activity of FOD and demonstrate how its structural water content affects the intercalation reaction and contributes to its performance. We show that both Li0 and Li+ intercalation in ... -
Áika: A Distributed Edge System for AI Inference
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-17)Video monitoring and surveillance of commercial fisheries in world oceans has been proposed by the governing bodies of several nations as a response to crimes such as overfishing. Traditional video monitoring systems may not be suitable due to limitations in the offshore fishing environment, including low bandwidth, unstable satellite network connections and issues of preserving the privacy of crew ... -
2022 Tonga Volcanic Eruption Induced Global Propagation of Ionospheric Disturbances via Lamb Waves
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-23)The Tonga volcano eruption at 04:14:45 UT on 2022-01-15 released enormous amounts of energy into the atmosphere, triggering very significant geophysical variations not only in the immediate proximity of the epicenter but also globally across the whole atmosphere. This study provides a global picture of ionospheric disturbances over an extended period for at least 4 days. We find traveling ionospheric ...