Viser treff 253-272 av 309

    • Safety challenges related to autonomous ships in mixed navigational environments 

      Kim, Tae-Eun; Perera, Lokukaluge Prasad Channa; Sollid, Magne-Petter; Batalden, Bjørn-Morten; Sydnes, Are Kristoffer (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-30)
      Digitalization and technological advancements have accelerated the development and emergence of autonomous and remotely controlled ships in the maritime transport sector. This type of vessels consists of highly intelligent and adaptive functionalities, equipped with a variety of external sensors and actuators to gain situation awareness, automated control and adaptive maneuvering for achieving more ...
    • SARINOR WP 3 "SØK". (Norut rapport 11/2015) 

      Antonsen, yngve; Sivertsen, Agnar Holten; Grydeland, Tom; Johansen, Kjell-Sture; Storvold, Rune; Rognmo-Hodge, Andrew; Hagen, Snorre; Sørensen, Geir-Arne; Sydnes, Maria; Sydnes, Are K.; Hansen, Bernt Inge (Research report; Forskningsrapport, 2015)
      Arbeidet analyserer tilgjengelig søk og redningskapasitet (SAR), med fokus på søk, med sikte på å avdekke forbedringspunkter. Arbeidet er begrenset til Norges ansvarsområde i henhold til Arktisk råds avtale om søk og redning i Arktis. Redningshelikopter på SAR beredskap består av 2 AS332L1 AWSAR på Svalbard, et Sea King på Banak og et i Bodø. I tillegg har Bristow et EC225 AWSAR helikopter i Hammerfest. ...
    • Scenario Design, Data Measurement, and Analysis Approaches in Maritime Simulator Training: A Systematic Review 

      Munim, Ziaul Haque; Krabbel, Helene Luise Sonna; Haavardtun, Per; Kim, Tae Eun; Bustgaard, Morten; Thorvaldsen, Haakon (Chapter; Bokkapittel, 2023-08-29)
      Developing objective assessment approach in maritime simulator training can be a highly challenging task due to the complexity of simulating realistic scenarios, capturing relevant performance indicators and establishing good assessment protocols. This study provides a synthesis of simulation scenario contexts, data collection tools, and data analysis approaches in published simulator training ...
    • A scientometrics view on sustainable development in surface mining: Everything from the beginning 

      Nouri Qarahassanlou, Ali (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-03-11)
      In summary, the study on sustainable development in the late 20th century aimed to balance economic, social, and environmental factors in open-pit mining. The study found that while mining has negative ecological impacts, it also has positive economic and social benefits. The study analyzed 77 articles and found a growing trend in scientific interest in sustainable development research from 1985 to ...
    • Sea-spray measurement tools and technique employed in marine icing field expeditions: A critical literature review and assessment using CFD simulations 

      Dhar, Sushmit; Naseri, Masoud; Khawaja, Hassan Abbas; Samuelsen, Eirik Mikal; Edvardsen, Kåre; Barabady, Javad (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-24)
      Sea-spray icing resulting from sea spray droplets accreting on exposed surfaces poses a significant safety concern for vessels and marine structures operating in cold climate regions. One of the key parameters determining the amount of ice accretion is the quantity of incoming sea spray, which eventually comes in contact with the structure in the presence of brine film freezing temperature. Hence, ...
    • Sea-spray measurement tools and technique employed in marine icing field expeditions: A critical literature review and assessment using CFD simulations 

      Dhar, Sushmit; Naseri, Masoud; Khawaja, Hassan Abbas; Samuelsen, Eirik Mikal; Edvardsen, Kåre; Barabady, Javad (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-24)
      Sea-spray icing resulting from sea spray droplets accreting on exposed surfaces poses a significant safety concern for vessels and marine structures operating in cold climate regions. One of the key parameters determining the amount of ice accretion is the quantity of incoming sea spray, which eventually comes in contact with the structure in the presence of brine film freezing temperature. Hence, ...
    • Seasonal and Spatial Variability of Atmospheric Emissions from Shipping along the Northern Sea Route 

      Figenschau, Nikolai; Lu, Jinmei (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-01-25)
      Large seasonal and spatial variabilities in Arctic shipping and its associated emissions are expected in the future, due to continuous sea ice decline. This study collected ship traffic data and the associated emissions of carbon dioxide (CO2), nitrogen oxides (NOx), sulfur dioxide (SO2), particulate matter (PM), and black carbon (BC) along the Northern Sea Route (NSR) in 2013. The aim is to analyze ...
    • Securitising the Future: Dystopian Migration Discourses in Poland and the Czech Republic 

      Bartoszewicz, Monika Gabriela; Eibl, Otto; El Ghamari, Magdalena (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-09)
      This paper presents findings of a comparative study carried out in Poland and the Czech Republic, which analysed the societal attitudes towards migration and migrants in Europe. Our research shows that the reaction to migration in Poland and the Czech Republic constitutes a reversed (bottom up) securitisation. Moreover, contrary to the majority of security challenges where the immediate threats are ...
    • Security of Supply: A National or European Competence? 

      Tuominen, Tomi; Halonen, Kirsi-Maria; Salminen, Mirva Miia Tuulikki (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-16)
      Security of supply refers to governmental policies that aim to secure the availability of critical products at all times. The COVID-19 pandemic brought to fore the importance of such policies, as suddenly there was an overwhelming need for critical medical supplies that the markets were not able to fulfil. Following the pandemic, the EU has started to construct its own security of supply policy, ...
    • Selecting technological alternatives for regulatory compliance towards emissions reduction from shipping: An integrated fuzzy multi-criteria decision-making approach under vague environment 

      Bui, Khanh Q.; Ölçer, Aykut I.; Kitada, Momoko; Ballini, Fabio (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-01)
      Due to the increasing pressure from stricter environmental regulations to reduce emissions in shipping, the maritime industry has been striving for finding more effective measures. Existing measures are often not enough to comply with new regulations. Among various alternative measures, it is not easy for decision-makers (shipowners and operators) to choose the most suitable alternative measure as ...
    • Selection of a high performance alloy for gas turbine blade using multiphysics analysis 

      Khawaja, Hassan Abbas; Moatamedi, Mojtaba (Journal article; Tidsskriftartikkel; Peer reviewed, 2014-04-03)
      With the extensive increase in the utilization of energy resources in the modern era, the need of energy extraction from various resources has pronounced in recent years. Thus comprehensive efforts have been made around the globe in the technological development of turbo machines where means of energy extraction is energized fluids. This development led the aviation industry to power boost due to ...
    • Sensitivity analysis of the SWAT model to spatial distribution of precipitation in streamflow simulation in an Arctic watershed 

      Bui, Minh Tuan; Lu, Jinmei; Nie, Linmei (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-12-04)
      This study approached a physically based, semi-distributed SWAT model to test the model sensitivity to the spatial distribution of precipitation. Ten scenarios of precipitation from five scattered rain gauges in an Arctic watershed Målselv in northern Norway were used as inputs to run the SWAT model. Streamflows were simulated. The model runs at monthly time interval based on the historical data of ...
    • Ship behavior prediction via trajectory extraction-based clustering for maritime situation awareness 

      Murray, Brian; Perera, Lokukaluge Prasad (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-20)
      This study presents a method in which historical AIS data are used to predict the future trajectory of a selected vessel. This is facilitated via a system intelligence-based approach that can be subsequently utilized to provide enhanced situation awareness to navigators and future autonomous ships, aiding proactive collision avoidance. By evaluating the historical ship behavior in a given geographical ...
    • Ship Performance and Navigation Data Compression and Communication under Autoencoder System Architecture 

      Perera, Lokukaluge Prasad; Mo, Brage (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-04-21)
      Modern vessels are designed to collect, store and communicate large quantities of ship performance and navigation information through complex onboard data handling processes. That data should be transferred to shore based data centers for further analysis and storage. However, the associated transfer cost in large-scale data sets is a major challenge for the shipping industry, today. The same cost ...
    • Ship Performance and Navigation Information under High Dimensional Digital Models 

      Perera, Lokukaluge Prasad; Mo, Brage (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-03-04)
      Future vessels will be facilitated by modern internet of things to collect various ship performance and navigation information. Such information is collected as large-scale data sets, the so-called Big Data, that should be utilized towards digitalization of the shipping industry. However, various data handling challenges are encountered by the shipping industry during the phase of digitalization, ...
    • Ship speed power performance under relative wind profiles in relation to sensor fault detection 

      Perera, Lokukaluge Prasad; Mo, Brage (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-19)
      Statistical Data analysis and visualization approaches to identify ship speed power performance under relative wind (i.e. apparent wind) profiles are considered in this study. Ship performance and navigation data of a selected vessel are analyzed, where various data anomalies, i.e. sensor related erroneous data conditions, are identified. Those erroneous data conditions are investigated and several ...
    • Shipping oil from the Russian Arctic: Past experiences and future prospects 

      Bambulyak, Alexei; Sydnes, Are K.; Milakovic, Aleksandar-Sasa; Frantzen, Bjørn (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-06)
      Transport of oil from Russian Arctic ports to Western markets was insignificant prior to 2002. In 2002, there was a major surge, with 5 million tonnes delivered westwards through the Barents Sea. By 2004, this had increased to 12 million tonnes. Since then, annual volumes have been on levels between 9 and 15 million tonnes. In the near future, the flow of oil cargo in the Arctic may rise ...
    • Shock Tube. Detail overview of equipment and instruments in the shock tube experimental setup 

      Khawaja, Hassan Abbas; Kapaya, Juma; Moatamedi, Mojtaba (Book; Bok, 2015)
      The shock tube is a device in which a normal shock wave is produced by the interaction of fluids at significantly high-pressure difference. The shock tube is comprised of two sections known as driver and driven sections. These two sections are interacted with the high-speed valve or a bursting disc. When the interaction happens, a shock wave forms almost instantaneously and propagates into the driven ...
    • 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 ...
    • An Slow Motion Detection Algorithm using High Order Statistic Approach 

      Yuan, Fuqing; Lu, Jinmei (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-16)
      Motion detection is vital for consumer electronics and the Internet of things (IOT). For a scenario where the motion is slow and gentle, the resolution of the motion sensor is critical for the detection, while the algorithm development is another critical issue to differentiate the motion signal from noise measurement. This paper investigates the feasibility of using higher order statistics ...