Recent additions

  • Simulation of peak tension loads in Subsea power cables during installation 

    Okkerstrøm, Lene; Gudmestad, Ove Tobias; Pedersen, Egil (Journal article; Tidsskriftartikkel; Peer reviewed, 2021)
    At present, most of the insurance claims in the offshore wind industry are due to cable failures where a large percentage occurs during the installation of the array and export cables. As the reliability of the cables depends on the location and installation method, it is important to map the risks involved, which can compromise the cable's integrity in individual projects. This paper presents ...
  • A methodology for collecting donning times of thermal protective immersion suits intended to be worn by passengers on vessels operating in cold environments 

    Brünig, Ria; Galea, Edwin R; Batalden, Bjørn-Morten; Oltedal, Helle Asgjerd (Journal article; Tidsskriftartikkel; Peer reviewed, 2021)
    Adequate thermal protection for passengers travelling on-board vessels in cold climate regions, such as that provided by thermal protective immersion suits (TPIS), enhances passenger survivability in emergency situations, in particular those requiring the abandonment of the vessel. As emergency abandonment is a time critical process, it is essential to consider the time required to correctly don the ...
  • Examination of turbulence impacts on ultra-short-term wind power and speed forecasts with machine learning 

    Chen, Hao; Birkelund, Yngve; Yuan, Fuqing (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-11-25)
    Wind turbines’ economic and secure operation can be optimized through accurate ultra-short-term wind power and speed forecasts. Turbulence, considered as a local short-term physical wind phenomenon, affects wind power generation. This paper investigates the use of turbulence intensity for ultra-short-term predictions of wind power and speed with a wind farm in the Arctic, including and excluding ...
  • Probability distributions for wind speed volatility characteristics: A case study of Northern Norway 

    Chen, Hao; Anfinsen, Stian Normann; Birkelund, Yngve; Yuan, Fuqing (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-11)
    The Norwegian Arctic is rich in wind resources. The development of wind power in this region can boost green energy and also promote local economies. In wind power engineering, it is a tremendous advantage to base projects on a sound understanding of the intrinsic properties of wind resources in an area. Wind speed volatility, a phenomenon that strongly affects wind power generation, has not received ...
  • Biosignal-Based Driving Skill Classification Using Machine Learning: A Case Study of Maritime Navigation 

    Xue, Hui; Batalden, Bjørn-Morten; Sharma, Puneet; Johansen, Jarle André; Prasad, Dilip K. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-10-19)
    This work presents a novel approach to detecting stress differences between experts and novices in Situation Awareness (SA) tasks during maritime navigation using one type of wearable sensor, Empatica E4 Wristband. We propose that for a given workload state, the values of biosignal data collected from wearable sensor vary in experts and novices. We describe methods to conduct a designed SA task ...
  • Resilience Assessment: A Performance‐Based Importance Measure 

    Nouri, ali; Zamani, Ali; Barabadi, Abbas; Mokhberdoran, Mahdi (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-11-12)
    The resilience of a system can be considered as a function of its reliability and recoverability. Hence, for effective resilience management, the reliability and recoverability of all components which build up the system need to be identified. After that, their importance should be identified using an appropriate model for future resource allocation. The critical infrastructures are under dynamic ...
  • Life in Anticipation of the COVID-19 Pandemic ‘Peak’: Reflecting on ‘Strategies’ for and Variations in attempts at ‘Flattening the Curve’ and Managing the Crisis 

    Staupe-Delgado, Reidar (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-08)
    On March 11th, 2020, the World Health Organization (WHO) declared the emerging COVID-19 threat a pandemic following the global spread of the virus. As countries around the world implemented emergency measures in a concerted effort to handle the emerging pandemic, the nature and implications of the different kinds of precautionary measures adopted have remained contested. The majority of countries ...
  • Locating potential sources of capacity and vulnerability in geographically remote areas: Reflections based on three case studies 

    Hamza, Mo; Eriksson, Kerstin; Staupe-Delgado, Reidar (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-07-02)
    The relationship between geographical and social forms of remoteness and the concepts of vulnerability and capacity remains unclear. Recognising that capacities and vulnerabilities tend to co-exist in a population, the article assumes that the dynamics between these concepts are situational. In this article we draw on three cases to analyse the issue. An Arctic case study provides insight on remoteness ...
  • Proactive Collision Avoidance for Autonomous Ships: Leveraging Machine Learning to Emulate Situation Awareness 

    Murray, Brian; Perera, Lokukaluge Prasad (Journal article; Tidsskriftartikkel; Peer reviewed, 2021)
    Autonomous ship technology is developing at a rapid pace, with the aim of facilitating safe ship operations. Collision avoidance is one of the most critical tasks that autonomous ships must handle. To support the level of safety associated with collision avoidance, this study suggests to provide autonomous ships with the ability to conduct proactive collision avoidance maneuvers. Proactive collision ...
  • The effect of temperature and digested sewage sludge cover over tailings on the leaching of contaminants from Ballangen tailings deposit 

    Lu, Jinmei; Leiviska, Tiina; Walder, Ingar (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-28)
    Dry covers can be applied above tailings to reduce and prevent formation of acid mine drainage and leaching of contaminants. Efficiency of covers is affected by different parameters, of which temperature change under climate change context is one. Here, a laboratory column leaching experiment was performed under four temperatures, 5, 10, 14, and 18 °C on unoxidized tailings from Ballangen, Norway. ...
  • Assessing the impact of the securitization narrative on climate change adaptation in Nigeria 

    Oramah, Chinwe P; Olsen, Odd Einar Falnes; Gould, Kenneth Arne Pettersen (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-01)
    In Nigeria, the threat posed by climate change is leading policymakers and the media to frame climate change as a security threat that warrants support for adaptive actions. We draw upon securitization theory to examine how security narratives affect climate change adaptation. Using primary and secondary data, we find that although securitization arguments are easily identified in climate change ...
  • A Comparative Study of Statistical Techniques for Prediction of Meteorological and Oceanographic Conditions: An Application in Sea Spray Icing 

    Shojaei Barjouei, Abolfazl; Naseri, Masoud (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-17)
    Environmental conditions in Arctic waters pose challenges to various offshore industrial activities. In this regard, better prediction of meteorological and oceanographic conditions contributes to addressing the challenges by developing economic plans and adopting safe strategies. This study revolved around simulation of meteorological and oceanographic conditions. To this aim, the applications of ...
  • Recognizing potential of LiDAR for comprehensive measurement of sea spray flux for improving the prediction of marine icing in cold conditions - A review 

    Dhar, Sushmit; Khawaja, Hassan (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-06)
    Marine icing phenomenon depends on multiple variables like vessel characteristics and uncertain factors like environmental parameters, developing an accurate model for its forecasting, evaluation, and estimation is very challenging. Commonly, most severe ice accretion is caused due to sea spray. The past attempts to measure impinging sea spray flux were carried out on specific parts of the spray ...
  • Drone-based Bridge Inspection in Harsh Operating Environment: Risks and safeguards 

    Aliyari, Mostafa; Ashrafi, Behrooz; Ayele, Yonas Zewdu (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-06-30)
    The inability to effectively and systematically identify and measure the damage in bridges will lead to an acceleration and dangerous deterioration of the health state of these structures. To repair and replace the aging and damaged bridge infrastructures, and prevent catastrophic bridge collapse, there is an urgent need to develop reliable, innovative, and efficient approaches to the performance ...
  • User Engagement in Developing Use-Inspired Glacial Lake Outburst Flood Decision Support Tools in Juneau and the Kenai Peninsula, Alaska 

    Abdel-Fattah, Dina; Trainor, Sarah; Hood, Eran; Hock, Regine; Kienholz, Christian (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-04-15)
    Glacial lake outburst floods (GLOFs) significantly affect downstream communities in Alaska. Notably, GLOFs originating from Suicide Basin, adjacent to Mendenhall Glacier, have impacted populated areas in Juneau, Alaska since 2011. On the Kenai Peninsula, records of GLOFs from Snow Glacier date as far back as 1949, affecting downstream communities and infrastructure along the Kenai and Snow river ...
  • Effects of mooring line breakage on dynamic responses of grid moored fish farms under pure current conditions 

    Cheng, Hui; Li, Lin; Ong, Muk Chen; Aarsæther, Karl Gunnar; Sim, Jaesub (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-17)
    Due to the lack of sheltered area, Norwegian fish farms are expanding to more exposed and remote sites. The severe environmental conditions in exposed sites can increase the risk of structural failure during aquaculture operations. In the present study, the program FhSim is employed to conduct time-domain simulations to investigate structural responses of a single-cage and 1 × 4 multi-cage fish farm ...
  • Verneombudets rolle i sikkerhetsarbeidet - case-studier i bygg og anlegg 

    Tinmannsvik, Ranveig Kviseth; Albrechtsen, Eirik; Kilskar, Stine Skaufel; Edwin, Kinga Wasilkiewicz (Research report; Forskningsrapport, 2020-08-21)
    Rapporten beskriver resultatene fra en kartlegging der formålet har vært å få økt kunnskap om verneombudets rolle, utfordringer og muligheter knyttet til deres deltakelse i sikkerhetsarbeidet i bygg- og anleggsprosjekter.<br><br> Datainnsamlingen har vært to-delt: Intervjuer med ulike aktører i tre case-prosjekter, og intervju/samtaler med RVO Bygg og RVO Anlegg. Det er identifisert åtte ...
  • Why Is the Construction Industry Killing More Workers Than the Offshore Petroleum Industry in Occupational Accidents? 

    Edwin, Kinga Wasilkiewicz; Nilsen, Marie; Albrechtsen, Eirik (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-07-07)
    In Norway, the fatal accident frequency per year is discernibly higher in the construction industry than in the petroleum industry. To probe the difference between the occupational safety levels in the two industries in Norway, semi-structured interviews with regulators, employer and employee organisations, company management, and safety personnel were conducted. This qualitative approach, together ...
  • Resilience Assessment of Wind Farms in the Arctic with the Application of Bayesian Networks 

    Mustafa, Albara; Barabadi, Abbas (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-07-22)
    Infrastructure systems, such as wind farms, are prone to various human-induced and natural disruptions such as extreme weather conditions. There is growing concern among decision makers about the ability of wind farms to withstand and regain their performance when facing disruptions, in terms of resilience-enhanced strategies. This paper proposes a probabilistic model to calculate the resilience of ...
  • The pure PV-EV energy system – A conceptual study of a nationwide energy system based solely on photovoltaics and electric vehicles 

    Boström, Tobias; Babar, Bilal; Hansen, Jonas Berg; Good, Clara (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-08)
    The objective of this conceptual study is to reveal the substantial potential and synergy of solar energy and electric vehicles (EVs) working together. This potential is demonstrated by studying the feasibility of a nationwide energy system solely reliant on solar energy and EVs. Photovoltaic (PV) solar energy is already an important energy source globally, but due to its intermittency it requires ...

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