Blar i NTNU Open på forfatter "Rehn, Carl Fredrik"

Viser treff 1-11 av 11

    • A Study of the Operational Patterns of LNG Carriers from AIS Data 

      Axelsen, Jørgen Jensen (Master thesis, 2018)
      This thesis investigates the operational patterns of LNG carriers from Automatic Identification System (AIS) Data. AIS was created for vessels as a safety-enhancing supplement to the radar, and over the last decade satellites ...

    • Combining design and strategy in offshore shipping 

      Strøm, Morten Andreas; Rehn, Carl Fredrik; Pettersen, Sigurd Solheim; Erikstad, Stein Ove; Asbjørnslett, Bjørn Egil; Brett, Per Olaf (Chapter, 2018)
      This paper presents the design-strategy planning (DSP) procedure as a framework that integrates life cycle strategies of a ship into the early stages of the design process. We argue that understanding strategic, tactical, ...

    • Designing for System Value Sustainment using Interactive Epoch-Era Analysis: A Case Study from Commercial Offshore Ships 

      Curry, Michael D.; Rehn, Carl Fredrik; Ross, Adam M.; Rhodes, Donna (Chapter, 2018)
      This paper applies the Interactive Epoch–Era Analysis (IEEA) framework on a case study from commercial offshore ship design, incorporating techniques from visual analytics such as interactive visualizations to gain insight ...

    • Handling Commercial, Operational and Technical Uncertainty in Early Stage Offshore Ship Design 

      Garcia Agis, Jose Jorge; Pettersen, Sigurd Solheim; Rehn, Carl Fredrik; Ebrahimi, Ali (Chapter; Peer reviewed, 2016)
      In this paper, we assess state-of-the-art methods for handling aspects of technical, commercial and operational uncertainty in the early stages of offshore ship design. Uncertainty affects the lifecycle performance of a ...

    • Identification and Valuation of Flexibility in Marine Systems Design 

      Rehn, Carl Fredrik (Master thesis, 2015)
      Marine systems, typically related to transport services and offshore petroleum projects, are often complex and involve a high degree of uncertainty related to their future operating context. Uncertain factors, such as oil ...

    • Ill-Structured Commercial Ship Design Problems: The Responsive System Comparison Method on an Offshore Vessel Case 

      Pettersen, Sigurd Solheim; Rehn, Carl Fredrik; Garcia Agis, Jose Jorge; Erikstad, Stein Ove; Brett, Per Olaf; Asbjørnslett, Bjørn Egil; Ross, Adam M.; Rhodes, Donna (Journal article; Peer reviewed, 2017)
      In this paper, we address difficulties in ill-structured ship design problems. We focus on issues related to evaluation of commercial system performance, involving perceptions of value, risk, and time, to better understand ...

    • Investigating feasibility of flexible ship concepts using tradespace network formulations 

      Rehn, Carl Fredrik; Pettersen, Sigurd Solheim; Erikstad, Stein Ove; Asbjørnslett, Bjørn Egil (Chapter, 2016)
      In this paper, we investigate the technical feasibility of flexible offshore ship design concepts with respect to retrofits. Flexibility is intended to improve performance, but there are often complex system interactions ...

    • Investigating tradeoffs between performance, cost and flexibility for reconfigurable offshore ships 

      Rehn, Carl Fredrik; Pettersen, Sigurd Solheim; Erikstad, Stein Ove; Asbjørnslett, Bjørn Egil (Journal article, 2018)
      This paper investigates tradeoffs between technical performance, cost and flexibility level for reconfigurable offshore ships. An offshore ship can be configured with various types of equipment; thus, its base structure ...

    • Investigation of Multivariate Freight Rate Prediction Using Machine Learning and AIS Data 

      Næss, Patrick Andre (Master thesis, 2018)
      This thesis investigates whether multivariate machine learning forecasting methods, using information extracted from Automatic Identification System (AIS) data, add additional information in predicting short-term freight ...

    • Ship Design under Uncertainty 

      Rehn, Carl Fredrik (Doctoral theses at NTNU;2018:215, Doctoral thesis, 2018)
      The purpose of this thesis is to develop knowledge to design better ships. More specifically, it concerns the development and application of effective methods and models for handling future contextual uncertainty in the ...

    • Sulphur Abatement Globally in Maritime Shipping 

      Lindstad, Elizabeth; Rehn, Carl Fredrik; Eskeland, Gunnar (Journal article; Peer reviewed, 2017)
      In 2016, the International Maritime Organization (IMO) decided on global regulations to reduce sulphur emissions to air from maritime shipping starting 2020. The regulation implies that ships can continue to use residual ...