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Vibration and Mobility Analysis of Hovering Rotary Wing UAV for Adaptive FSO Beam Alignment
(Chapter; Bokkapittel, 2024-11-28)Unmanned aerial vehicles (UAVs) are regarded as a potential platform for deploying airborne free space optical (FSO) fronthaul/backhaul links. The challenge emerges from the UAV hovering mobility which deteriorates beam alignment. To solve this challenge, we conducted two hover flights using a quadrotor UAV to measure vibration levels and hover fluctuations offering practical insights into the ... -
Modelling ductile fracture in an Al alloy with crystal plasticity models
(Chapter; Bokkapittel, 2024-04-24)Crystal plasticity models enhanced with coupled or uncoupled damage and fracture criteria give an opportunity to account for the role of microstructure in ductile fracture, most directly representing the local variations of stress and strain fields inside and between the grains, voids and particles. Some computationally efficient crystal plasticity, damage and fracture models have recently been ... -
Scheduling with Sequence-Dependent Setup Times in Short-Term Production Planning: A Main Path Analysis-Based Review
(Journal article; Tidsskriftartikkel; Peer reviewed, 2025-04-09)The role of setup times in production planning and control was recognised in the late 1960s. Since then, a growing number of scheduling problems have accounted for sequence-dependent setup time variables. This study aims to provide a systematic review of setup times in the short-term production planning literature, using an objective, algorithm-based approach. The Main Path Analysis (MPA) and ... -
Laser-Induced Plasma Effects on Bond Breaking in High-Density Polyethylene Pyrolysis
(Journal article; Tidsskriftartikkel; Peer reviewed, 2025-04-16)The conventional use of Laser-Induced Breakdown Spectroscopy (LIBS) for elemental analysis in high-density polyethylene (HDPE) limits the exploration of bond behavior in Physics and Chemistry. A suitable combination of process parameters, exceeding the bond dissociation threshold, enables LIBS to break HDPE bonds, facilitating laser-induced pyrolysis. However, understanding bond behavior post-breakage, ... -
Energy Storage and the Green Transition: An Exploration of the Technology Selection Decision in the Arctic Region
(Conference object; Konferansebidrag, 2025-01-27)The Arctic region faces both challenges and opportunities in the green transition. Grid and electricity price stability, renewable adoption, and electric vehicle infrastructure highlight the need for resilient energy networks. Energy Storage emerges as a solution to ensure reliability and enable decentralization. This study aims to explore energy storage-related technology selection decisions, which ... -
GAP‐analyse av dagens opplæring for underordnet mannskap ved seiling i arktiske farvarnn sett i lys av næringens behov
(Research report; Forskningsrapport, 2023)Kompetansenodens formål er ifølge Nærings- og fiskeridepartementet sitt oppdrag å styrke den maritime næringens kompetanse om særskilte utfordringer knyttet til skipsoperasjoner i polare farvann. I arbeidet med å styrke arktisk maritim kompetanse skal det tas utgangspunkt i innmeldte problemstillinger, utfordringer og behov fra aktører i skipsfartsnæringen. <p> <p>Polarkoden stiller krav til ... -
Conversion between CAD models and generalized expo-rational B-spline surfaces
(Journal article; Tidsskriftartikkel; Peer reviewed, 2025-05-31)The proposed method demonstrates the conversion between a NURBS model and a generalized expo-rational B-spline (GERBS) surface with the aim of utilizing special combined expo-rational basis functions in finite element analysis.<p> <p>To achieve the transformation from a NURBS patch to a GERBS surface element, a linear extraction operator is employed. This operator maps the local combined expo-rational ... -
Thermographic analysis of ethylene glycol–based aircraft anti-icing fluid: Investigation of fluid failure mechanisms during simulated snow endurance tests
(Journal article; Tidsskriftartikkel; Peer reviewed, 2025-02-26)Applying anti-icing fluid is the primary method of protecting aircraft surfaces from freezing precipitation before takeoff. This research's main objective is to deepen our understanding of the fluid failure mechanisms using the infrared thermography technique to observe the snow-fluid interactions. We use a laboratory-scale setup with an optical and infrared camera to study the interaction between ... -
Implementing Swarm Production System with Multi-Robot Simulation
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-20)Swarm Production is a novel paradigm promoting a high degree of flexibility in material flow and reconfigurability in shop floor layout, enabling high-mix production in manufacturing through the induction of autonomous robots. The conceptual description promises a leap within smart manufacturing and the Industry 4.0 domain. Implementing this theoretical concept becomes crucial to the self-organising ... -
An Adaptive Modulation Technique for Power Quality Improvement in Standalone Single-Phase Current Source Inverters
(Chapter; Bokkapittel, 2024-07-15)The presence of low-frequency power oscillations on the DC link and overlap-time both degrade the output power quality of single-phase current source inverters. This paper proposes a novel modulation technique that simultaneously mitigates the effects of both low-frequency power oscillations and overlap-time. By simultaneously addressing these issues, the proposed adaptive modulation technique ... -
Intelligent and self-reconfigurable manufacturing system
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-20)Customer demand and profit potential have pushed companies to offer diverse customization options in their products and move towards mass customization. To move towards mass customization reconfigurable manufacturing systems (RMS) have been prosed as a solution. However, it comes with challenges, including labor, costs, time, and complexity. Introducing intelligence, smartness and state-of-the-art ... -
Sustainable fish farms and optimal use of the fish food
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024)The open sea fish farm industry is under considerable pressure to ensure that fish farming represents a sustainable industry. Many challenges are present related to fish health due to fish lies, considerable density of fish with limited room to move, accelerations of the cage in large waves and needs to limit the use of antibiotic in the offshore environment. Much good work is done to increase ... -
Importance of substrate type and its constituents on overall performance of microbial fuel cells
(Journal article; Tidsskriftartikkel; Peer reviewed, 2025-01-12)Microbial Fuel Cells (MFC) have emerged as a potential wastewater treatment technology that utilizes metabolic processes of microorganisms present in the wastewater to disintegrate organic substrates and harness direct electricity. This paper reviews the potential of different wastewater types as a suitable substrate for microbial activities in MFCs. Substrate composition (carbon source, nutrient ... -
Home Energy Management System for a Residential Building in Arctic Climate of Norway Using Non-Intrusive Load Monitoring and Deep Learning
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024-05-06)Residential buildings can actively participate in energy management strategies by integrating advanced metering infrastructure to have a reliable and stable distribution system. This paper introduces a novel home energy management system (HEMS) framework to minimize total electricity costs by optimizing the charging of an electric vehicle (EV). The methodology incorporates a non-intrusive load ... -
A Network-based Set Covering Model for Charging Station Location Problem: A Case Study in Norway
(Chapter; Bokkapittel, 2024-02-25)Due to the worldwide concern about excessive greenhouse emissions and global warming, vehicles with cleaner sources of energy, e.g., electricity, hydrogen, etc., have been increasingly introduced into the market. Apart from the regulations and government incentives, the distance convenience and accessibility to charging stations have become one of the most important success factors to promote the ... -
Solenergi i Longyearbyen
(Master thesis; Mastergradsoppgave, 2020-02-01)Denne rapporten presenterer og drøfter implementering av større mengder solkraft i energisystemet i Longyearbyen. Solkraft er ikke det første man tenker på når man nevner Svalbard, men som absolutt viser seg å ha et potensial så langt nord. Mye på grunn av midnattssolen og kaldt klima. Det eksisterer allerede noen installasjoner av solkraft i og rundt Longyearbyen. Disse har blitt kartlagt og ... -
Editorial: Supply Chain Transformation for Pursuing Carbon-neutrality
(Journal article; Tidsskriftartikkel; Peer reviewed, 2025-01-28) -
Investigating the Influence of Oil Shale Ash and Basalt Composite Fibres on the Interfacial Transition Zone in Concrete
(Conference object; Konferansebidrag, 2024-02) -
Damage Accumulation in the Hybrid Composite Material Reinforced by Oil Shale Ash (OSA) Powder and 3D-Knitted Fabric Subjected to Mechanical Loading
(Journal article; Tidsskriftartikkel, 2024-02-23)Hybrid reinforcement in a composite material (CM), in many situations, allows better govern material mechanical properties. Polymer matrix CM plate is reinforced with small particles and macro-fibers. Particles are oil shale ash (OSA) powder, macro-fibers – basalt fiber threads im-pregnated by matrix material. With the goal to find out elastic properties of the matrix- polymer with OSA, samples with ... -
INFLUENCE OF PARTICULATE MIXTURE CONTAINING STABILISED WOOD ON LONG-TERM BEHAVIOUR OF WOOD-CEMENT COMPOSITES. CASE STUDY
(Journal article; Tidsskriftartikkel; Peer reviewed, 2024)This paper presents research on the changes in the properties of cement-bonded particleboard modified with particulate mixture (PM). PM replaced 4% of the binder (cement) and 4% of the filler (spruce chips). The cement-bonded particleboards were tested for physical (bulk density, swelling, linear expansion due to relative humidity changes) and mechanical properties (modulus of rupture and modulus ...
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