Now showing items 2316-2335 of 3412

    • Objektiv metode for dokumentasjon av støtskader på laks 

      Steinke, Damian (Master thesis, 2021)
      I denne masteroppgaven ble det gjort et forsøk på å etablere en objektiv metode for å dokumentere hvilke effekter støt mot oppdrettslaks har for fiskehelse og -velferd. En oppdrettslaks opplever fysiske støt i rørsystemene ...
    • Observations from hydrodynamic testing of a flexible, large-diameter monopile in irregular waves 

      Bachynski, Erin Elizabeth; Thys, Maxime; Hoseini Dadmarzi, Fatemeh (Peer reviewed; Journal article, 2020)
      As the offshore wind industry moves toward larger wind turbines and deeper water, wave-induced loads on large-diameter monopiles are of increasing importance for ultimate limit state design checks. The combination of a ...
    • Observations of Turbulence at a Near-Surface Temperature Front in the Arctic Ocean 

      Koenig, Zoé Charlotte; Fer, Ilker; Kolås, Eivind; Fossum, Trygve Olav; Norgren, Petter; Ludvigsen, Martin (Peer reviewed; Journal article, 2020)
      High‐resolution ocean temperature, salinity, current, and turbulence data were collected at an Arctic thermohaline front in the Nansen Basin. The front was close to the sea ice edge and separated the cold and fresh surface ...
    • Observer design for underwater vehicles with position and angle measurement 

      Refsnes, Jon E Gorset; Pettersen, Kristin Ytterstad; Sørensen, Asgeir Johan (Journal article, 2006)
      In this paper we propose a new observer system for underwater vehicles. The main design objective behind this strategy is to reduce the destabilizing effect of the Coriolis and centripetal forces and moments in the observer. ...
    • Obtaining Hyperspectral Signatures for Seafloor Massive Sulphide Exploration 

      Sture, Øystein; Snook, Ben; Ludvigsen, Martin (Journal article; Peer reviewed, 2019)
      Seafloor massive sulphide (SMS) deposits are hosts to a wide range of economic minerals, and may become an important resource in the future. The exploitation of these resources is associated with considerable expenses, and ...
    • OC6 Phase Ib: Validation of the CFD predictions of difference-frequency wave excitation on a FOWT semisubmersible 

      Lu, Wang; Robertson, Amy; Jonkman, Jason; Yu, Yi-Hsiang; Koop, Arjen; Nadal, Adrià Borràs; Li, Haoran; Bachynski-Polic, Erin Elizabeth; Pinguet, Romain; Shi, Wei; Zeng, Xinmeng; Zhou, Yang; Xiao, Qing; Kumar, Rupesh; Sarlak, Hamid; Ransley, Edward; Brown, Scott; Hann, Martyn; Netzband, Stefan; Wermbter, Malwin; López, Beatriz Méndez (Peer reviewed; Journal article, 2021)
      During the previous OC511 project, state-of-the-art mid-fidelity engineering tools for floating wind systems were found to consistently underpredict the nonlinear, low-frequency responses of semisubmersible offshore wind ...
    • OC6 Phase II: Integration and verification of a new soil–structure interaction model for offshore wind design 

      Bergua, Roger; Robertson, Amy; Jonkman, Jason; Platt, Andy; Page Risueno, Ana Maria; Qvist, Jacob; Amet, Ervin; Cai, Zhisong; Han, Huali; Beardsell, Alec; Shi, Wei; Galvan, Josean; Bachynski-Polic, Erin Elizabeth; McKinnon, Gill; Harnois, Violette; Bonnet, Paul; Suja, Loup; hansen, anders melchior; Alonso, Iñigo Mendikoa; Aristondo, Ander; Battistella, Tommaso; Garcia, Raul Guanche; Schünemann, Paul; Pham, Thanh-Dam; Trubat, Pau; Alarcón, Daniel; Haudin, Florence; Nguyen, Minh Quan; Goveas, Akhilesh (Peer reviewed; Journal article, 2021)
      This paper provides a summary of the work done within the OC6 Phase II project, which was focused on the implementation and verification of an advanced soil–structure interaction model for offshore wind system design and ...
    • Occupational safety in aquaculture – Part 1: Injuries in Norway 

      Holen, Siri Mariane; Utne, Ingrid Bouwer; Holmen, Ingunn Marie; Aasjord, Halvard Laurits (Journal article; Peer reviewed, 2017)
      This article presents an overview of reported injuries in the Norwegian aquaculture industry focusing on the production of Atlantic salmon and trout, which dominates the fish farming industry in Norway. Two different data ...
    • Occupational safety in aquaculture – Part 2: Fatalities in Norway 1982–2015 

      Holen, Siri Mariane; Utne, Ingrid Bouwer; Holmen, Ingunn Marie; Aasjord, Halvard Laurits (Journal article; Peer reviewed, 2017)
      This article presents an overview of reported fatalities in the Norwegian aquaculture industry focusing on the production of Atlantic salmon and trout, which dominate the fish farming industry in Norway. The data on ...
    • Ocean space utilization 

      Schreier, Sebastian; Arena, Felice; Bingham, Harry; Fonseca, Nuno; Hu, Zhiqiang; Karmakar, Debabrata; Kim, Ekaterina; Li, Hui; Liu, Pengfei; Murai, Motohiko; Pahos, Spiro J; Tian, Chao; Wang, George (Chapter, 2022)
      In the light of rising sea level, scarcity of land-based resources and increasingly populated coastal areas, interest of project developers and countries turns towards the ocean, exploring the possibilities of utilizing ...
    • Ocean wave spectrum estimation using measured vessel motions from an in-service container ship 

      Nielsen, Ulrik Dam; Dietz, Jesper (Peer reviewed; Journal article, 2020)
      This article is about the use of measured wave-induced vessel motions for estimation of ocean wave spectra by application of the wave buoy analogy. In the study, data from a larger, in-service container ship is considered. ...
    • Octabuoy Concept and Spar Buoys: Non Linear Effects and Analysis 

      Dahl, Line J.C. Haakenaasen (Master thesis, 2012)
      The age of the easy accessible hydrocarbon goes towards the end and new more challenging fields is the future of the oil industry. This is often synonymous with large depths where sea bed mounted platforms are highly ...
    • Offshore Towing of Floating Wind Turbines design aspects with focus on numerical modelling 

      Hope, Martin Mongstad (Master thesis, 2021)
      Denne master oppgaven på dynamisk analyse av marine taue operasjoner, søker å foreslå en modell for vurdering av det dynamisk streke i ei taueline. Fire ulike modeller har blitt evaluert, en av modellen bruker en kvasistatisk ...
    • Offshore wind turbine blade installation. Development of a motion-compensated Stewart platform for blade installation with a floating vessel 

      Macabu Araujo Peres, Jadyr (Master thesis, 2023)
      Med de økende vanndybdene til de nye havvindparkene, de utfordrende jordforholdene, tilgjengeligheten av eiendeler og andre faktorer, kan det hende at oppjekkbare installasjonsfartøyer ikke lenger er egnet til å fullføre ...
    • Offshore Wind Turbine Modelling State of the Art and future development 

      Saberniak, Florian (Master thesis, 2022)
      Denne masteroppgaven presenterer state of the art teknologier og utviklingstrender for vindturbiner. Offshore vind blir sett på som en lovende del av energisektoren i målet mot et bytte til fornybare energikilder. DNV sin ...
    • Offshore wind turbine operations and maintenance: A state-of-the-art review 

      Ren, Zhengru; Verma, Amrit Shankar; Li, Ye; Teuwen, Julie J.E.; Jiang, Zhiyu (Peer reviewed; Journal article, 2021)
      Operations and maintenance of offshore wind turbines (OWT) play an important role in the development of offshore wind farms. Compared with operations, maintenance is a critical element in the levelized cost of energy, given ...
    • Offshoring Strategies in Norwegian Ship Production 

      Semini, Marco; Brett, Per Olaf; Hagen, Arnulf; Kolsvik, Jørund; Alfnes, Erlend; Strandhagen, Jan Ola (Journal article; Peer reviewed, 2018)
      For the past several decades, Norwegian shipyards have focused on innovative, customized, and technologically advanced ships, often serving the offshore oil and gas industry. Usually, a significant part of the ship production ...
    • Oil spill damage: a collision scenario and financial liability estimations for the Northern Sea Route area 

      Bambulyak, Alexei; Ehlers, Sören (Peer reviewed; Journal article, 2020)
      The global demand in energy resources is moving the petroleum industry to the Arctic with its huge resource potential. The lack of infrastructure onshore increases the role of the Arctic marine shipping and the importance ...
    • OMAE2017-61362 Consolidation of Empirics for Calculation of VIV Response 

      Voie, Per Erlend; Wu, Jie; Resvanis, Themistocles; Larsen, Carl Martin; Vandiver, Kim; Triantafyllou, Michael S.; Baarholm, Rolf Jarle (Chapter; Peer reviewed, 2017)
      The present paper consolidates available experimental results for both sub-critical and critical Reynolds numbers and varying surface roughness and formulates a coefficient excitation model that aims at unbiased response ...
    • OMAE2017-61659 Classification of Aquaculture Locations in Norway With Respect to Wind Wave Exposure 

      Lader, Pål; Kristiansen, David; Alver, Morten; Bjelland, Hans Vanhauwaert; Myrhaug, Dag (Chapter; Peer reviewed, 2017)
      In Norway there are a total of 1070 registered sites for salmon farming all along the coast. Trends in the aquaculture industry in the recent decade are that salmon farming sites tend to gradually relocate to more wave and ...