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  • Review of Low-Temperature Crack (LTC) Developments in Asphalt Pavements 

    Khawaja, Hassan; Tanveer, Ahmad (Journal article; Tidsskriftartikkel; Peer reviewed, 2018)
    The article presents a review of low-temperature crack (LTC) developments in asphalt pavements commonly observed in regions affected by cold weather. The cold weather contributes significantly towards the development of these low-temperature cracks (LTCs). Since the 1960s, many studies have been published, proposing various cracking mechanisms. The simplistic reason for the development of cracks in ...
  • Digitalization of the power business: How to make this work? 

    Svendsen, Arne Brufladt; Tollefsen, Trond; Gjengedal, Terje; Goodwin, Morten; Antonsen, Stian (Peer reviewed; Book; Chapter, 2018)
    As a result of the digitalization of the power business in Norway and Europa, a lot of new possibilities and challenges arise. In 2014 an expert committee one outlined a proposal for the future grid company structure in Norway (Reiten, 2014). In addition, new technologies are being implemented in the system. Wind power, solar power, un-regulated small hydro power production, battery storage domestic ...
  • Optical water types of the Nordic Seas and adjacent areas 

    Aas, Eyvind; Højerslev, Niels Kristian; Høkedal, Jo; Sørensen, Kai (Journal article; Tidsskriftartikkel; Peer reviewed, 2013-05-20)
    A new map of Jerlov's optical water types in the Nordic Seas and adjacent waters at 139 locations, as well as a table with statistical and geographical properties of the vertical attenuation coefficient of downward irradiance at 475 nm, are presented. The data analysis is based on 715 recordings at different stations, at latitudes between 54° and 82°N, and longitudes between 31°W and 49°E, obtained ...
  • Validation of air ventilation in tunnels, using experiments and computational fluid dynamics 

    Myrvang, Torgeir; Khawaja, Hassan (Journal article; Peer reviewed, 2018)
    The study presented in this paper concerns the ventilation system inside tunnels. The ventilation system is responsible for the removal of exhaust gases produced by vehicles and for providing a clear view throughout the tunnels in routine operations and in the event of fire. The ventilation system has several stages, which are equipped with one or more fans and can be activated together or separately. ...
  • On Some Power Means and Their Geometric Constructions 

    Høibakk, Ralph; Lukkassen, Dag; Meidell, Annette; Persson, Lars Erik (Journal article; Peer reviewed, 2018)
    The main aim of this paper is to further develop the recently initiatedresearch concerning geometric construction of some power means wherethe variables are appearing as line segments. It will be demonstratedthat the arithmetic mean, the harmonic mean and the quadratic meancan be constructed for any number of variables and that all power meanswhere the number of variables are n = 2m, m 1 2 N for all ...
  • Når blir skipsfarten grønn? 

    Hoff, Bjarte; Østrem, Trond (Kronikk, 2018-04-25)
    n av utfordringene i forbindelse med dagens skipsfart er utslipp til luft, hovedsakelig karbondioksid og nitrogenoksider. Disse utslippene er knyttet til oljefyrte forbrenningsmotorer som dominerer dagens skipsflåte. Det er overveiende sannsynlig at det er en direkte sammenheng mellom global oppvarming og utslipp av klimagasser. Utslipp til luft kan også bidra til sur nedbør og svevestøv, for å nevne ...
  • Effect of seasonal mesoscale and microscale meteorological conditions in Ny-Ålesund on results of monitoring of long-range transported pollution 

    Dekhtyareva, Alena; Holmén, Kim; Maturilli, Marion; Hermansen, Ove; Graversen, Rune (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-09-06)
    Ny-Ålesund is an international research settlement where the thermodynamics and chemical composition of the air are monitored. The present work investigates the effects of micrometeorological conditions, mesoscale dynamics and local air pollution on the data collected at two different locations around the village. Daily filter measurements of sulphur dioxide and non-sea salt sulphate from the temporary ...
  • Measuring Thickness of Marine Ice Using IR Thermography 

    Rashid, Taimur; Khawaja, Hassan; Edvardsen, Kåre (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-09-04)
    <p>There are several challenges to operating in a cold climate. Marine icing is one of them, and its mitigation is vital for marine operations.</p> <p>The presented work is a laboratory-scale setup to measure marine ice thickness. The developed methodology can be applied towards de-/anti-icing setups. The method described is based on measuring the average surface temperatures of the marine ice. ...
  • Local Flexibility Market Design for Aggregators Providing Multiple Flexibility Services at Distribution Network Level 

    Olivella-Rosell, Pol; Lloret-Gallego, Pau; Munne-Collado, Ingrid; Villafafila-Robles, Roberto; Sumper, Andreas; Ottesen, Stig Ødegaard; Rajasekharan, Jayaprakash; Bremdal, Bernt Arild (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-04-02)
    This paper presents a general description of local flexibility markets as a market-based management mechanism for aggregators. The high penetration of distributed energy resources introduces new flexibility services like prosumer or community self-balancing, congestion management and time-of-use optimization. This work is focused on the flexibility framework to enable multiple participants to compete ...
  • Large-Scale Additive Manufacturing Machine 

    Plotnikov, Dmitri (Master thesis; Mastergradsoppgave, 2018-08-21)
    This master thesis contains an overview of the additive manufacturing technology and building process of the large-scale Fused Deposition Modelling (FDM) additive manufacturing machine from the old Wafer Handling Diffusion machine. The thesis study is mainly focused on practical work and describes the techniques used during the project execution. The built machine can print large 3D prototypes from ...
  • Distributed Management of Resources in a Smart City using Multi-Agent Systems (MAS) 

    Molchanov, Igor (Master thesis; Mastergradsoppgave, 2018-08-17)
    This document describes study of distributed management of resources in the context of Smart City with support of multi-agent systems. The investigated points include theoretical concepts of Smart City and application of multi-agent systems, decentralized and centralized designs for agent-based solutions and aspects of interactions between different self-interested agents. The document explores ...
  • Detection and prediction of falls among elderly people using walkers 

    Degtiarev, Aleksei (Master thesis; Mastergradsoppgave, 2018-08-17)
    Falls of elderly people are big health burden, especially for long-term consequence. Yet we already have research, describing how exactly elderly fall and reasons of falls. We aimed to develop means that could not only detect falls and send alerts to relatives and doctors to conquer one of the biggest fears of elderly to fall and do not have the ability to call for help, but also tried to implement ...
  • Wire Gear for Small Rotary Actuator intended for Low Earth Orbit Applications. 

    Aarud, Vebjørn Orre (Master thesis; Mastergradsoppgave, 2018-08-16)
    In this master thesis, a small rotary actuator with wire driveline intendent for space solutions is developed and tested. The replication of the environment with focus on surface friction, surface roughness, and more dynamical related features are considered. Features like temperature, vibration, radiation and more are excluded to limit the size. This because the field of interest in this iteration ...
  • Reliable parameter identification for synchronous machines 

    Alves, Erick Fernando (Master thesis; Mastergradsoppgave, 2018-08-16)
    This work investigates and implements algorithms for reliable parameter identification for salient pole synchronous machines that can be used for condition monitoring, on line assessment of the power grid, and adaptive control. All these applications are steps necessary to enable a smarter power grid, in which seamless integrated digital technology provides state estimation, fault detection, and ...
  • Large-scale Wind Power Integration in Northern Norway 

    Singh, Arwinder (Master thesis; Mastergradsoppgave, 2018-08-16)
    Norway has very high flexibility in energy production since hydropower covers about 95% of yearly energy demand. It is best to have a combination of wind and hydropower and hence it applies perfectly here in Norway. The performance of the wind farm can be significantly enhanced by employing full-capacity converters. The state-of-the-art literature study has been done on Squirrel Cage Induction ...
  • Innvirkninger av distribuert produksjon i svake distribusjonsnett, lokalisert i nordområdene. Hvordan påvirker plusskunder det omkringliggende lavspente distribusjonsnettet. 

    Johannessen, Leif Inge Krogstad (Master thesis; Mastergradsoppgave, 2018-08-16)
    I denne rapporten har virkninger av plusskunder i svake, lavspente distribusjonsnett blitt undersøkt. Gjennom en informasjonsinnsamling, ble de største utfordringer for fremtidige plusskunder identifisert. Herunder aktuelle teknologier, energiresuser, regelverk og tekniske forhold. Det ble undersøkt hvilke utfordringer et nettselskap kan forvente seg, ved introduksjon av lokal produksjon i et ...
  • Rammeverk for modellering og simulering av husholdningsapparater 

    Nilsen, Christian Bjerknes (Master thesis; Mastergradsoppgave, 2018-08-16)
    Denne oppgaven har hatt til hensikt å utarbeide et rammeverk for modellering og simulering av husholdningsapparater i Simulink, hvor det er muligheter for sammenkobling av flere enheter basert på typiske utstyr i norske husholdninger. Tilkoblingen av modellene kan være via TN-nett, IT-nett eller andre mindre kilder i Simulink. Videre er det gjennomført en litteraturstudie av ulike typer utstyr ...
  • Solskjerming av vindu 

    Norum, Joakim (Master thesis; Mastergradsoppgave, 2018-08-16)
    Bakgrunnene for oppgaven er at et hvert byggeprosjekt har behov for klima- og energitekniske beregninger. Solavskjerming kan ha en innvirkende faktor på de klima- og energitekniske beregninger. I dag er det lite krav som stilles til solavskjermingen i byggetekniske forskrifter. Det er derfor ønskelig å forstå hvilke krav som er satt og forstå innvirkningen på solavskjerming i et energiperspektiv.For ...
  • BIM 4D - Prosjektstyring og visualisering. Ved prosjektet Østensjøveien 16. BIM 4D – Project management and visualization 

    Bogen, Trym Håvard (Master thesis; Mastergradsoppgave, 2018-08-16)
    This thesis describes building information modeling focusing on the fourth dimension using a specific software. Within this possibilities and challenges with the use of the fourth dimension during an ongoing project are presented, as well as suggestions on how this can be communicated on site. The literature study describes basic theory for both project planning, project management and building ...
  • Green Buildings in Cold Climate 

    Alseth, Nils Bernhard; Andersen, Lasse (Master thesis; Mastergradsoppgave, 2018-08-16)
    The purpose of this report is to enlighten and analyze how the differences in policies, regulations and other instrumental means affect the environmental footprint and energy consumptions of buildings in cold regions such as northern Japan and northern Norway. Simulations are conducted as a part of a case study to further enlighten and visualize by figures the differences between Japan and Norway. ...

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