Viser treff 837-856 av 916

    • Topological Singularities in Periodic Media: Ginzburg–Landau and Core-Radius Approaches 

      Alicandro, Roberto; Braides, Andrea; Cicalese, Marco; De Luca, Lucia; Piatnitski, Andrey (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-12-20)
      We describe the emergence of topological singularities in periodic media within the Ginzburg–Landau model and the core-radius approach. The energy functionals of both models are denoted by Eε,δ, where ε represent the coherence length (in the Ginzburg–Landau model) or the core-radius size (in the core-radius approach) and δ denotes the periodicity scale. We carry out the -convergence analysis ...
    • Torque and Axial Loading Physics for Measuring Atmospheric Icing Load and Icing Rate 

      Mughal, Umair Najeeb; Virk, Muhammad Shakeel (Peer reviewed; Journal article; Tidsskriftsartikkel, 2015-01-31)
      Measuring icing load and icing rate are important parameters for an atmospheric icing sensor. A new icing sensor has recently been designed and developed at Narvik University College for measuring atmospheric icing rate, icing load and icing type. Unlike the existing atmospheric icing sensors commercially available in market, which uses the axial loading for measuring icing load and icing rate, this ...
    • Total Productive Maintenance in an Industry 4.0 Framework 

      Noureddine, Rami (Master thesis; Mastergradsoppgave, 2019-06-28)
      Maintenance is a key operation function that is required to improve business performance by avoiding equipment breakdown. In 1971, Total Productive Maintenance (TPM), a lean manufacturing approach, has been developed and widely used as a maintenance strategy to gain a competitive advantage in industry. However, with the advent of new technology and the internet of things, manufacturing process are ...
    • Toward Interactive Music Generation: A Position Paper 

      Dadman, Shayan; Bremdal, Bernt Arild; Bang, Børre; Dalmo, Rune (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-11-30)
      Music generation using deep learning has received considerable attention in recent years. Researchers have developed various generative models capable of imitating musical conventions, comprehending the musical corpora, and generating new samples based on the learning outcome. Although the samples generated by these models are persuasive, they often lack musical structure and creativity. For instance, ...
    • Towards a Concept for Digitalized Yard Logistics—Outlining the Next-Generation Features 

      Strandhagen, Jo Wessel; Semini, Marco Giovanni; Alfnes, Erlend (Chapter; Bokkapittel, 2023-09-14)
      Yards are industrial sites for production and servicing of ships and offshore maritime installations, such as oil and gas platforms and modules, offshore windmills, and fish farms—all essential products in the maritime industry. Although many yards are performing highly complex and technically advanced production, there is still a need to bring the internal logistics of yards to a corresponding level ...
    • Towards a Framework for Noctilucent Cloud Analysis 

      Sharma, Puneet; Dalin, Peter; Mann, Ingrid (Journal article; Tidsskriftartikkel; Peer reviewed, 2019)
      In this paper, we present a framework to study the spatial structure of noctilucent clouds formed by ice particles in the upper atmosphere at mid and high latitudes during summer. We studied noctilucent cloud activity in optical images taken from three different locations and under different atmospheric conditions. In order to identify and distinguish noctilucent cloud activity from other objects ...
    • Towards automatic configuration and programming of a manufacturing cell 

      Arnarson, Halldor; Al-Sallami, Hussein Mahdi Yaseen; Solvang, Bjørn; Bremdal, Bernt Arild (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07-04)
      Manufacturing industries are moving from mass production towards customized production, aiming for highquality products with innovative technologies, low prices, and high reliability. A reconfigurable manufacturing system (RMS) is an attractive approach to facilitate the movement toward such flexible manufacturing systems. However, reconfiguration and programming of RMS are time-consuming and ...
    • Towards automatic generation of image recognition models for industrial robot arms 

      Arnarson, Halldor; Bremdal, Bernt Arild; Hanssen, Magnus Fredheim (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-12)
      As the world moves towards mass customization, there is a need for a manufacturing system that can quickly adapt to market changes. Reconfigurable manufacturing systems (RMS) have been proposed as a solution. RMS is designed to be modular with a high degree of flexibility. However, such a structure creates a lot of complexity. For instance, if the modules are moved or changed, the robot arms in the ...
    • Towards smart layout design for a reconfigurable manufacturing system 

      Arnarson, Halldor; Yu, Hao; Olavsbråten, Morten Monland; Bremdal, Bernt Arild; Solvang, Bjørn (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-05-02)
      Global competition and increased variety in products have created challenges for manufacturing companies. One solution to handle the variety in production is to use reconfigurable manufacturing systems (RMS). These are modular systems where machines can be rearranged depending on what is being manufactured. However, implementing a rearrangeable system drastically increases complexity, among which ...
    • Towards the smart and sustainable transformation of Reverse Logistics 4.0: a conceptualization and research agenda 

      Sun, Xu; Yu, Hao; Solvang, Wei Deng (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-08-16)
      The recent advancement of digitalization and information and communication technology (ICT) has not only shifted the manufacturing paradigm towards the Fourth Industrial Revolution, namely Industry 4.0, but also provided opportunities for a smart logistics transformation. Despite studies have focused on improving the smartness, connectivity, and autonomy of isolated logistics operations with a primary ...
    • TRACKING VOLUME CHANGE OF THE BULK COMMODITIES WITH INTERFEROMETRIC SAR 

      Wu, Zhenming; Ellingsen, Pål Gunnar; Jia, Haiying; Ådland, Roar Os (Journal article; Tidsskriftartikkel; Peer reviewed, 2023)
      Bulk commodities are crucial to global economy and modern society. Some commodities, such as grain, are normally stored in cylindrical tanks. The height of the tank’s roof may be correlated to the substance quantity inside the tank, indicating that roof displacement may be associated with the volume of the bulk commodities. Here we analyzed the displacements derived from C-band Sentinel-1 data ...
    • A Trade-off Model for Green Supply Chain Design: An Efficiency-versus-Emission Analysis 

      Yu, Hao; Solvang, Wei Deng (Peer reviewed; Chapter; Bokkapittel, 2018-04-09)
      —With the growing concern of climate change and global warming, the reduction on carbon emissions of supply chain activities have been increasingly focused by both academics and corporates in the last two decades. The increased public awareness on sustainability and stricter environmental policies together enforce the companies to rethink their practices in supply chain design and operations in an ...
    • Transformation in manufacturer in the era of "Made in China 2025" 

      Li, Xuancheng (Master thesis; Mastergradsoppgave, 2019-06-07)
      China’s state council has unveiled a ten-year national plan, Made in China 2025, designed to transform China from a manufacturing giant into a world manufacturing power. Of all the projects includes in the “Made in China 2025” plan, intelligent and automated manufacturing is crucial. It is based on concepts i.e., internet of things, cloud computing, and big data. These technologies will be involved ...
    • Transformation towards small-scale intelligent manufacturing system (SIMS). A case study of the workshop at UiT Narvik 

      Chai, Zhiwei (Master thesis; Mastergradsoppgave, 2017-06-14)
      With the development of increasing globalization of markets, the small and medium-sized enterprises (SMEs) are necessary to improve their innovation ability, and enhance their competitiveness in the global market. This project analyzes the global and region current situation of SMEs, and then provide the conclusion of advantages and challenges of SMEs, especially the sort of small manufacturing ...
    • Transient analysis of road tunnel power system 

      Ivanova, Elizaveta (Master thesis; Mastergradsoppgave, 2018-08-16)
      The main tasks of Statens Vegvesen is to plan, build and maintain the roads of Norway. Tunnels are included as a part of this task. Due to expected changes in usage patterns and needs, the Norwegian authorities decided to adapt to the European model the design of low voltage networks. The backup power system is one of the most important parts of the installation and presents an independent source ...
    • Transient Model of an RSW System with CO2 Refrigeration – A Study of Overall Performance 

      Brodal, Eivind; Jackson, Steven; Eiksund, Oddmar (Journal article; Peer reviewed; Tidsskriftartikkel, 2017-11-07)
      Refrigerated seawater (RSW) cooling using CO2 based refrigeration is a relatively new technology that shows promising performance in cold climates. For being a refrigerant CO2 has a low global warming potential (GWP) and is therefore recognized as an environmentally friendly alternative if the unit is competitive on energy efficiency. However, RSW systems with CO2 have a significant reduction in ...
    • Transition to DC distribution grids 

      Awoniyi, Taiwo (Master thesis; Mastergradsoppgave, 2017-08-15)
      "The war between AC and DC has emerged once again due to the rapid development and advancement of electric power technologies. Nowadays, power electronics and DC/DC converters are able to change voltage levels, which could only be achieved by an AC transformer hundred years ago. Rising trend development of electric vehicle and renewable energy technology have led to an urgency for re-evaluation of ...
    • Transportsystemer, Vann og avløps -teknikk 

      Starbo, Jostein (Master thesis; Mastergradsoppgave, 2023-01-17)
      Faget «Transportsystemer for Vann og avløpsteknikk» ved Institutt for Bygg, Energi og Material teknologi skal foreleses for første gang ved UiT Norges Arktiske Universitet våren 2023. For å utforme pensum i emnet vil denne oppgaven samle, analysere og søke å forbedre modeller fra følgende kilder og metoder: • Data fra utgitte lærebøker, rapporter eller tilgjengelig materiale. • Data fra aktuelle ...
    • A two-component nonlinear variational wave system 

      Nordli, Anders Samuelsen; Aursand, Peder Kristian (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-14)
      We derive a novel two-component generalization of the nonlinear variational wave equation as a model for the director field of a nematic liquid crystal with a variable order parameter. The equation admits classical solutions locally in time. We prove that a special semilinear case is globally well-posed. We show that a particular long time asymptotic expansion around a constant state in a moving ...
    • Two-scale convergence in thin domains with locally periodic rapidly oscillating boundary 

      Pettersson, Irina (Journal article; Tidsskriftartikkel; Peer reviewed, 2017)
      The aim of this paper is to adapt the notion of two-scale convergence in Lp to the case of a measure converging to a singular one. We present a specific case when a thin cylinder with locally periodic rapidly oscillating boundary shrinks to a segment, and the corresponding measure charging the cylinder converges to a one-dimensional Lebegues measure of an interval. Themethod is then applied to the ...