Viser treff 165-184 av 310

    • Localized advanced ship predictor for maritime situation awareness with ship close encounter 

      Wang, Yufei; Perera, Lokukaluge Prasad Channa; Batalden, Bjørn-Morten Erdal (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-05-04)
      The marine navigation environment can become further complex when ships with different autonomy levels are introduced. To ensure navigation safety in such a mixed environment, advanced ship predictor type technologies are essential in aiding ship navigators to attain the highest levels of situation awareness (SA). Consequently, precise ship trajectory prediction, specifically within a short prediction ...
    • 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 ...
    • Lokalt snøskredvarsel for Longyearbyen - Evaluering av nåværende system 

      Øien, Knut; Albrechtsen, Eirik (Research report; Forskningsrapport, 2022-10-11)
      Denne rapporten beskriver og evaluerer det nåværende systemet for snøskredvarsel i Longyearbyen. Evalueringen baserer seg på sammenlikning mot regionalt varsel på Svalbard, lokalvarsel i Europa, samt en retningslinje for lokalvarsel i Sveits. <p> <p>Fokus er rettet mot utarbeidelse og bruk av lokalvarselet, og mulige forbedringer, spesielt knyttet til innhold og struktur. Praktiske forslag ...
    • Lost in Translation – Following the Ecosystem Approach from Malawi to the Barents Sea 

      Hammer, Maria (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-01-06)
      New ideas are constantly being produced as a changing world demands solutions to new problems. International environmental regimes often present ideas to reduce negative human effects on the environment. Implementation of ideas has often been studied through diffusion theory, where ideas are expected to be implemented in their original version. Translation theory from New Scandinavian Institutionalism ...
    • Lumped, constrained cable modeling with explicit state-space formulation using an elastic version of Baumgarte stabilization 

      Skjong, Stian; Reite, Karl-Johan; Aarsæther, Karl Gunnar (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-29)
      This paper presents a modeling approach for efficient simulation of slender structures, such as wires, cables and ropes. Lumped structural elements are connected using constraints. These are solved explicitly, using an elastic version of Baumgarte stabilization. This avoids singularities in the matrix inversions. The resulting explicit state-space formulation filters the higher order dynamics and ...
    • Machine learning forecasts of Scandinavian numerical weather prediction wind model residuals with control theory for wind energy 

      Chen, Hao; Zhang, Qixia; Birkelund, Yngve (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-08-22)
      The quality of wind data from the numerical weather prediction significantly influences the accuracy of wind power forecasting systems for wind parks. Therefore, an in-depth investigation of these wind data themselves is essential to improve wind power generation efficiency and maintain grid reliability. This paper proposes a novel framework based on machine learning for concurrently analyzing and ...
    • Management of risks - a Paradox? 

      Nilsen, Aud Solveig; Leonhardsen, Mette (Conference object; Konferansebidrag, 2016-11-23)
    • Marine Icing and Anti/De-icing Systems 

      Rashid, Taimur; Khawaja, Hassan Abbas; Edvardsen, Kåre (Conference object; Konferansebidrag, 2015-12-10)
      Shipping operations are on the rise in the Arctic region. Due to these increased activities, maritime transport operations are encountering significant challenges with respect to the safety and reliability. These shipping operations are comprised of commercial vessels such as oil tankers, container ships, fishing vessels, tourism cruises, research and offshore exploration vessels and icebreakers In ...
    • Marine icing observed on KV Nordkapp during a cold air outbreak with a developing polar low in the Barents sea. 

      Samuelsen, Eirik Mikal; Løset, Sveinung; Edvardsen, Kåre (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-06)
      Marine icing is a phenomenon that may occur for temperatures below subfreezing where sea spray either is lofted from the sea surface or being generated by waves interacting with a ship or a structure. On a voyage from Tromsø to the waters east of Bjørnøya late February 1987, the Norwegian Coast Guard vessel KV Nordkapp experienced heavy icing due to a polar low that raged over these waters during ...
    • Marine Operations in Arctic conditions 

      Gudmestad, Ove Tobias; Døskeland, Øystein Husevåg (Journal article; Tidsskriftartikkel; Peer reviewed, 2023)
      Marine operations require careful early planning and thereafter detailed planning prior to project execution. The time from initiating an operation to finalization of the activity is typically several days. The activity can only be conducted during limited weather conditions. The planning prior to the offshore operations does, therefore, require accurate weather forecasting. The weather conditions ...
    • Marine stewardship and complexity – How to enhance a better process of risk governance in the Norwegian area of the Arctic Ocean? 

      Nilsen, Aud Solveig; Hammer, Maria (Conference object; Konferansebidrag, 2016-01)
    • Maritime safety and the ISM code: a study of investigated casualties and incidents 

      Batalden, Bjørn-Morten; Sydnes, Are K. (Journal article; Tidsskriftartikkel; Peer reviewed, 2013-08-27)
      Abstract In 1993, the International Maritime Organization adopted the International Safety Management (ISM) Code which requires all shipping companies operating certain types of vessels to establish safety management systems. Nevertheless, two decades later, maritime safety remains a concern. This article studies 94 maritime cases investigated by the Maritime Accident Investigation Branch in the ...
    • Maritime Security and Threat Assessments 

      Eidnes, Ingrid Batalden; Batalden, Bjørn-Morten Erdal; Sydnes, Are K. (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-12)
      Maritime security is still a challenge in international trade. In this case‐study we analyze how the Norwegian Shipowners’ Mutual War Risks Insurance Association (DNK) provides Norwegian maritime companies with regional assessments of threat‐levels. Through a survey and a series of interviews, we study factors that affect the communication and perception of threats, in addition to how maritime ...
    • Marketing structures and strategies of Nordic SME’s: A Norwegian case study 

      Ayele, Yonas Zewdu (Conference object; Konferansebidrag, 2016-10-10)
    • Measuring the Sea Spray Flux using High-Speed Camera 

      Johansen, Jarle André; Edvardsen, Kåre; Sharma, Puneet; Khawaja, Hassan Abbas (Conference object; Konferansebidrag, 2015-12-10)
      The sea spray contains water droplets that are produced due to sea waves that collide with the marine structures as well as the breaking of waves due to the strong winds. Similarly, fog and precipitation at sea level may contribute to the phenomenon of sea spray containing water droplets of minuscule sizes. Wind characteristics (speed and direction) also has a direct influence on the speed of water ...
    • A Methodological Framework for the Resilience Analysis of Road Transport Networks Exposed to Freezing Rain 

      Ashrafi, Behrooz; Naseri, Masoud; Di Maio, Francesco P.; Zio, Enrico (Conference object; Konferansebidrag, 2022)
      Road transport network is one of the major critical infrastructures to be maintained resilient, since its disruption would not only have direct economic consequences, but it could also lead to domino effects on other critical infrastructures. This study proposes a methodological framework for the analysis of the resilience of road transport networks exposed to natural hazards, in particular to ...
    • 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 ...
    • A methodology for identification of suitable drilling waste handling systems in the Arctic region 

      Ayele, Yonas Zewdu; Barabadi, Abbas; Barabady, Javad (Journal article; Peer reviewed; Tidsskriftartikkel, 2016)
      As the demands to reduce the environmental impact of oil and gas operations increase in the Arctic region, the need to identify suitable waste handling systems become more essential. The aim of this paper is to propose a methodology for identifying suitable drilling waste handling system, by considering the distinctive operating condition of the Arctic region. The proposed methodology can help the ...
    • A mixture frailty model for maintainability analysis of mechanical components: a case study 

      Zaki, Rezgar; Barabadi, Abbas; Garmabaki, Amir Hossein Soleiman; Nuri, Ali (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-11-07)
      Knowing the maintainability of a component or a system means that repair resource allocations, such as spare part procurement and maintenance training, can be planned and optimized more effectively. Repair data are often collected from multiple and distributed units in different operational conditions, which can introduce heterogeneity into the data. Part of such heterogeneity can be explained and ...
    • Modelling the transport of oil after a proposed oil spill accident in Barents Sea and its environmental impact on Alke species 

      Lu, Jinmei; Yuan, Fuqing; Mikkelsen, J.D.; Ohm, C; Stange, E; Holand, M (Konferansebidrag; Conference object, 2017)
      Accidental oil spills can have significant effect on the coastal and marine environment. As the oil extraction and exploration activities increase in the Barents Sea, it is of increasingly importance to investigate the potential oil spill incidents associated with these activities. In this study, the transport and fate of oil after a proposed oil spill incident in Barents Sea was modelled by oil ...