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norskInstitutt for datateknologi og beregningsorienterte ingeniørfag
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Old and new on the Peetre K-functional and its relations to real interpolation theory, quasi-monotone functions and wavelets
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-12-10)The Peetre K-functional is a key object in the development of the real method of interpolation. In this paper we point out a less known relation to wavelet theory and its applications to approximation theory and engineering applications. As a new basis for further development of these studies we present some known properties in the form appropriate for further applications and then derive new ... -
Augmented reality projections as a tool to enrich simulations in health care education: Combining AR projector technology with manikins
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-11-24)The advancement of augmented reality in recent years has increased the interest and potential of using the technology in various fields. In health care education augmented reality is becoming a popular tool, together with manikins, to enhance realism of patient interaction for students in a learning environment. The purpose of this research was to study an augmented reality projector and its ability ... -
Homogenization of nonlocal spectral problems
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-11-11)We consider a spectral problem for convolution-type operators in environments with locally periodic microstructure and study the asymptotic behavior of the bottom of the spectrum. We show that the bottom point of the spectrum converges as the microstructure period tends to zero, and identify the limit in terms of an additive eigenvalue problem for effective Hamilton–Jacobi equation. In the periodic ... -
Research on wavelets and artificial intelligence algorithms for structural health monitoring of concrete bridges
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-02-23)In this paper, we present a comprehensive study of wavelet theory with a focus on structural damage detection. A new example of the application of operational modal analysis (OMA) techniques to a concrete railway arch bridge located over the Kalix river in L{\aa}ngforsen, Sweden is presented. Results from the OMA techniques are used for finite element model (FEM) updating of this concrete railway ... -
ON HARDY-TYPE INEQUALITIES AS AN INTELLECTUAL ADVENTURE FOR 100 YEARS
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-02-02)We describe some chosen ideas and results for more than 100 years prehistory and history of the remarkable development concerning Hardy-type inequalities. In particular, we present a newer convexity approach, which we believe could partly have changed this development if Hardy had discovered it. In order to emphasize the current very active interest in this subject, we fnalize by presenting some ... -
Oscillatory and spectral properties of a class of fourth-order differential operators via a new Hardy-type inequality
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024)In this paper, we study oscillatory properties of a fourth-order differential equation and spectral properties of a corresponding differential operator. These properties are established by f irst proving a new second-order Hardy-type inequality, where the weights are the coefficients of the equation and the operator. This new inequality, in its turn, is established for functions satisfying certain ... -
Weighted estimates of commutators of singular operators in generalized Morrey spaces beyond Muckenhoupt range and applications
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-05-30)For a certain class of radial weights, we prove weighted norm estimates for commutators with BMO coefficients of singular operators in local generalized Morrey spaces. As a consequence of these estimates, we obtain norm inequalities for such commutators in the generalized Stummel-Morrey spaces. We also discuss a.e. well-posedness of singular operators and their commutators on weighted generalized ... -
Crafting Creative Melodies: A User-Centric Approach for Symbolic Music Generation
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-18)Composing coherent and structured music is one of the main challenges in symbolic music generation. Our research aims to propose a user-centric framework design that promotes a collaborative environment between users and knowledge agents. The primary objective is to improve the music creation process by actively involving users who provide qualitative feedback and emotional assessments. The ... -
Development of a Jig for CMM Measurements on AutoStore Bins
(Master thesis; Mastergradsoppgave, 2023-05-25)The AutoStore Bins are highly technical plastic products manufactured with injection moulding. To ensure the production parameters are within given specifications, CMM scanning is done on samples from the production. -
Review and Application of Optimal Sensor Placement Method on Herøysund Bridge
(Master thesis; Mastergradsoppgave, 2023-05-17)The study attempts to find the best sensor configuration for modal identification on the Herøysund Bridge. The objective is to increase the amount of data obtained from structural testing while reducing the number of sensors needed thereby reducing the cost of the sensor system. Four frequently used optimal sensor placement (OSP) methods, including the modal kinetic energy (MKE) method, the effective ... -
Design of a universal mounting system for flat panel TV screens
(Master thesis; Mastergradsoppgave, 2024-05-15)In compact living spaces like micro-houses and apartments, there is a growing interest in décor and furnishing that utilize multi-functional systems and furniture. Of particular interest is the ability to facilitate the transformation of room setups, allowing for changes in the viewing positions of TVs regardless of alterations in room orientation. A thorough examination of the problem area uncovered ... -
Numerical Modelling of Damage Conditions on Herøysund Bridge in Herøy Municipality, Nordland Norway
(Master thesis; Mastergradsoppgave, 2024-05-15)The usability of bridges is highly dependent on their safety conditions since they are subjected to all sorts of loading that might compromise their ability to withstand stresses over a prolonged period. As a result, dynamic response evaluations and fracture mechanics analysis are essential concepts that can help in monitoring the behaviour of bridges, predicting their lifespan, and planning ... -
Traffic monitoring and warnings for winter roads
(Master thesis; Mastergradsoppgave, 2024-05-15)This master thesis reports on the research of how weather affects driving patterns during the winter. By utilizing Python, data was analyzed to show how much different weather phenomena affects the total amount of traffic. Showing how things like precipitation, temperatures, wind, snow depth affects said amount. The result of the analysis shows how big effect the various weather conditions have and ... -
Pumped Hydroelectric Storage at Niingen Power Plant
(Master thesis; Mastergradsoppgave, 2023-05-15)This document is a master thesis that attempts to assess the plan of pumping water from the nearby lakes of Djupåvatnet (435 m), Buvatnet (465 m), and Strandvatnet (5 m above sea level) up to the lake of Niingensvatnet (510-494 m above sea level) to store energy for later use and increase energy generation. The assessment process proved that pumping water from Strandvatnet and Djupåvatnet to ... -
Application of Change Point Detection Algorithms in Adaptable Symbolic Music Segmentation Task Using MIDI Representation
(Master thesis; Mastergradsoppgave, 2024-05-15)This thesis studies the application of Change Point Detection (CPD) algorithms to the segmentation of symbolic music using MIDI representations. This study focuses on the use of two primary CPD algorithms, PELT and Binary Segmen- tation, to analyze and detect transitions within the Lakh MIDI dataset, which is known for its diversity in musical genres and styles. The main focus of the thesis is on ... -
Floating Offshore Wind Turbine Operations in Arctic Conditions
(Master thesis; Mastergradsoppgave, 2024-05-15)Offshore wind energy is receiving increased attention as a promising renewable energy source day by day, and the research in the field of designing the floating platforms to support floating offshore wind turbine (FOWT) has become very important. The evaluation of the dynamic stability of a FOWT in a challenging marine environment is the platform's capacity to maintain its initial position. These ... -
Optimization Conveyor Roller, LKAB
(Master thesis; Mastergradsoppgave, 2024-05-15)This master thesis presents a study on the structural optimization of conveyor idlers, focusing on the idler shell and shaft. The research aims to enhance the performance and efficiency of conveyor systems by reducing weight and improving stability of idler roller, beginning with a thorough load analysis to determine the static and dynamic forces exerted on idler. The study employs a combination of ... -
Design and Optimization of Conveyor Belt Rollers
(Master thesis; Mastergradsoppgave, 2024-05-15)Belt conveyor systems play a crucial role in the continuous transportation of bulk materials across varying distances. However, ensuring the reliability of these systems remains a significant concern for operators due to the potential financial losses incurred from system downtime, which not only impacts revenue from material conveying but also disrupts subsequent material processing facilities. The ... -
Optimization of conveyor roller, LKAB
(Master thesis; Mastergradsoppgave, 2024-05-15)ABSTRACT The aim of this thesis is to optimize the performance, material, life and accessories for the conveyor rollers installed in longest conveyor section “15101 smst TR010” of LKAB Narvik, which is under the SILO with overall conveyor length of 620 meter. The report outlines the problems created by groundwater falling inside the tunnel, dust and spoilage of iron ore pallets outside the conveyor ... -
Study of Virtual Inertia and its impacts on Power Oscillations
(Master thesis; Mastergradsoppgave, 2024-05-15)This study explores the changing dynamics of power systems in the context of the global shift to renewable energy, focusing on inertia and its influence on frequency stability. Traditional stability mechanisms, centered around rotating masses like synchronous generators, face challenges due to the integration of renewables and frequency converters, resulting in a reduction in overall system inertia. ...
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