Now showing items 32-51 of 98

    • Ice Detection of Pure and Saline Ice Using Infrared Signature 

      Rashid, Taimur; Khawaja, Hassan Abbas; Edvardsen, Kåre (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-11-30)
      The paper shows the possible implementation of an Infrared (IR) ice detection technique. In respect of safety in marine operations, saline ice detection can be significant for automated de-icing systems. Experimentation is performed to observe and detect saline and pure ice samples. The discussed detection mechanism is unique and differs from passive IR detection by introducing the self-heating ...
    • Ice Detection Setup Using Infrared and Active Heating 

      Rashid, Taimur; Khawaja, Hassan Abbas; Edvardsen, Kåre (Conference object; Konferansebidrag, 2015)
      Considering the cold environment operations, ice accretion can occur at a rapid pace and can adversely affect the operations. In such scenario, ice detection is useful for the ice mitigation and removal upon the marine and offshore structures. Various techniques exist in the literature to detect the icing mainly utilizing its physical or electromagnetic properties. The parameters measured by these ...
    • Identifying hazards to include in risk analyses 

      Leonhardsen, Mette; Olsen, Odd Einar Falnes; Nilsen, Aud Solveig (Book; Bokkapittel; Chapter; Bok, 2018)
      A risk analysis should provide decision makers with information regarding relevant hazards. The initiating phase, where the risk analysts identify hazards to be included in the risk analysis, lays the foundation for the rest of the analysis. This phase is, therefore, of great importance. In this paper, we examine how risk analysts in a municipal setting identified potential adverse events and how ...
    • Improving Mechanical Grip of Tyres on Snow and Icy Road Surfaces using Finite Element Method 

      Ludvigsen, Sondre; Khawaja, Hassan Abbas (Conference object; Konferansebidrag, 2016)
      Harsh winter conditions are known to be one of the most challenging environments for driving. Although the number of fatal accidents is higher during the summer compared to the winter in Norway (according to Norwegian Highways Authority), the total number of accidents is higher in the winter season. These accidents mainly happen due to loss traction on snowy or icy road surfaces. The loss of traction ...
    • Infrared Detection for Anti-Icing Systems in Ship Operations 

      Rashid, Taimur; Khawaja, Hassan Abbas; Edvardsen, Kåre (Conference object; Konferansebidrag, 2014)
    • Infrared Thermal Signature Evaluation of a Pure and Saline Ice for Marine Operations in Cold Climate 

      Rashid, Taimur; Khawaja, Hassan Abbas; Edvardsen, Kåre; Mughal, Umair Najeeb (Peer reviewed, 2015)
      Marine operations in cold climates are subjected to abundant ice accretion, which can lead to heavy ice loads over larger surface area. For safe and adequate operations on marine vessels over a larger area, remote ice detection and ice mitigation system can be useful. To study this remote ice detection option, lab experimentation was performed to detect the thermal gradient of ice with the infrared ...
    • Infrared Thermal Signature Evaluation of a Pure Ice Block 

      Rashid, Taimur; Khawaja, Hassan Abbas; Edvardsen, Kåre; Mughal, Umair Najeeb (Conference object; Konferansebidrag, 2015-08-23)
      Marine operations in cold climates are subjected to heavy ice accretion, which can lead to heavy ice loads causing safety concerns. Atmospheric and sea spray icing can cause severe ice accretion on structures. Ice detection over the relatively larger surface area of marine platforms and vessels could be significant for ice mitigation and its removal in cold climates. A thermal ice signature ...
    • International Cooperation on Search and Rescue in the Arctic 

      Sydnes, Are K.; Sydnes, Maria; Antonsen, Yngve (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-09)
      SAR in the Arctic is a complex and dynamic cross-disciplinary activity that requires the combined effort of multiple actors with specialized human and technical resources. Due to limited resources and infrastructure in the Arctic, international cooperation is particularly important. This article applies a conceptual framework drawn from regime-theory to study SAR cooperation in the Arctic. More ...
    • Investigation of Ice-PVC separation under Flexural Loading using FEM Analysis 

      Xue, Hui; Khawaja, Hassan Abbas (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-08-29)
      This paper presents the FEM technique applied in the study of ice separation over a polyvinyl chloride (PVC) surface. A two layer model of ice and PVC is analysed theoretically using Euler-Bernoulli beam theory and the rule of mixtures. The physical samples are prepared by freezing ice over the PVC surfaces. The samples are tested experimentally in a four-point loading setup. The experimental results ...
    • Involvement of Multiphysics in Petroleum Research: Case Study on Shock Tube Experimental Setup 

      Khawaja, Hassan Abbas; Moatamedi, Mojtaba (Conference object; Konferansebidrag, 2014)
    • Knowledge in food tourism: the case of Lofoten and Maremma Toscana 

      Bertella, Giovanna (Journal article; Tidsskriftartikkel; Peer reviewed, 2010)
    • Management of risks - a Paradox? 

      Nilsen, Aud Solveig; Leonhardsen, Mette (Conference object; Konferansebidrag; Others; Andre, 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 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)
    • 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 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 ...
    • 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 (Peer reviewed; Conference object; Konferansebidrag; Bokkapittel; Chapter, 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 ...
    • Multi-fluidic Simulation using Multiphysics tools: Case Study on a LNG Plant 

      Khawaja, Hassan Abbas; Schive, Tor; Edvardsen, Kåre (Conference object; Konferansebidrag, 2014)