Now showing items 21-40 of 77

    • Combining Optimization and Simulation for Designing a Robust Short-sea Feeder Network 

      Medbøen, Carl Axel Benjamin; Holm, Magnus Bolstad; Msakni, Mohamed Kais; Fagerholt, Kjetil; Schütz, Peter (Peer reviewed; Journal article, 2020)
      Here we study a short-sea feeder network design problem based on mother and daughter vessels. The main feature of the studied system is performing transshipment of cargo between mother and daughter vessels at appropriate ...
    • Cost-effective planning and abatement costs of battery electric passenger vessel services 

      Havre, Håkon; Lien, Ulrik; Ness, Mattias Myklebust; Fagerholt, Kjetil; Rødseth, Kenneth Løvold (Peer reviewed; Journal article, 2022)
      This paper analyzes the energy replacement potential for high-speed passenger vessels. Emphasis is on whether better planning of services can mitigate technical and economic barriers to zero emission transport. A novel ...
    • Cost-Emission Relations for Maritime Logistics Support in Aquaculture 

      Slette, Hans Tobias; Asbjørnslett, Bjørn Egil; Fagerholt, Kjetil (Journal article; Peer reviewed, 2019)
      This paper presents a method for evaluation of the economic cost of reducing the emissions from a fleet operating in the aquaculture industry. The method accounts for the fact that different fleet compositions perform ...
    • A decomposition solution approach to the troops-to-tasks assignment in military peacekeeping operations 

      Chaudry, Nadia; Vermedal, Ingunn; Fagerholt, Kjetil; Fauske, Maria Fleischer; Stålhane, Magnus (Peer reviewed; Journal article, 2019)
      This paper considers the Peacekeeping Troops-to-Tasks Problem (PTTP). The PTTP deals with assigning battlegroup resources to a set of tasks associated with a given peacekeeping mission. The tasks may be spread across several ...
    • Design of a sustainable maritime multi-modal distribution network – case study from automotive logistics 

      Dong, Bo; Christiansen, Marielle; Fagerholt, Kjetil; Chandra, Saurabh (Peer reviewed; Journal article, 2020)
      Multi-modal transportation takes advantage of multiple transport modes and can be an effective way to ease the negative environmental effects of freight transportation. This paper addresses a multi-modal distribution network ...
    • Designing Pipeline Networks for Carbon Capture and Storage of CO2-sources in Germany: An Industry Perspective 

      Bennæs, Anders; Skogset, Martin; Svorkdal, Tormod; Fagerholt, Kjetil; Herlicka, Lisa; Meisel, Frank; Rickels, Wilfried (Peer reviewed; Journal article, 2023)
    • The Dynamic Electric Carsharing Relocation Problem 

      Hellem, Simen; Julsvoll, Carl Andreas; Moan, Magnus; Andersson, Henrik; Fagerholt, Kjetil; Pantuso, Giovanni (Peer reviewed; Journal article, 2021)
      This article addresses a relocation and recharging problem faced by modern carsharing operators who manage a fleet of electric vehicles. As customers utilize the fleet, batteries are depleted and vehicles are possibly left ...
    • An economic analysis of introducing autonomous ships in a short‐sea liner shipping network 

      Akbar, Abeera; Aasen, Anna Kristine Almestad; Msakni, Mohamed Kais; Fagerholt, Kjetil; Lindstad, Elizabeth; Meisel, Frank (Peer reviewed; Journal article, 2020)
      The development of autonomous ships is at an advanced stage. It seems to be just a question of time before such ships become available at an industrial scale. In this paper, we investigate the economic advantages of utilizing ...
    • Effective utilization of service vessels in fish farming: Fleet design considering the characteristics of the locations 

      Slette, Hans Tobias; Asbjørnslett, Bjørn Egil; Fagerholt, Kjetil; Lianes, Ingeborg Margrete; Noreng, Maren Theisen (Peer reviewed; Journal article, 2022)
      Effective utilization of service vessels in sea-based fish farming requires that the vessels are suited to the operating environments at the fish farms. This paper presents a methodology for assessing service vessel fleet ...
    • Evaluating fleet effectiveness in tactical emergency response missions using a maximal covering formulation 

      Pettersen, Sigurd Solheim; Fagerholt, Kjetil; Asbjørnslett, Bjørn Egil (Peer reviewed; Journal article, 2019)
      This paper concerns the evaluation of alternative fleets of advanced special vessels, like coast guard or emergency response and rescue vessels. The paper proposes a mathematical programming formulation of the Fleet ...
    • Evaluating port development strategies for a modal shift: a Norwegian case study 

      Ormevik, Andreas Breivik; Erikstad, Stein Ove; Fagerholt, Kjetil (Peer reviewed; Journal article, 2020)
      We study the design of a multi-modal distribution network for the transportation of incoming containers from a container terminal to nearby customer regions. The motivation for the study has been the relocation of the ...
    • An exact solution method for the capacitated item-sharing and crowdshipping problem 

      Behrend, Moritz; Meisel, Frank; Fagerholt, Kjetil; Andersson, Henrik (Peer reviewed; Journal article, 2019)
      The item-sharing and crowdshipping problem combines two concepts of the sharing economy, namely item-sharing and crowdshipping. Item-sharing is about renting items among members of a sharing community. Crowdshipping addresses ...
    • The Fish Feed Production Routing Problem 

      Brekkå, Ivar; Randøy, Solveig; Fagerholt, Kjetil; Thun, Kristian; Vadseth, Simen Tung (Peer reviewed; Journal article, 2022)
      This paper introduces the fish feed production routing problem (FFPRP) faced by Norwegian salmon feed producers. The FFPRP is comprised of a production scheduling problem and a rich vehicle routing problem (VRP) and thus ...
    • Green Tramp Shipping Routing and Scheduling: Effects of Market-Based Measures on CO2 Reduction 

      Wang, Xin; Norstad, Inge; Fagerholt, Kjetil; Christiansen, Marielle (Chapter, 2019)
      In this chapter we examine, from a tramp ship operator’s point of view, how potential CO2 emission reduction measures impact the operational decisions and their economic and environmental consequences. Two market-based ...
    • Heuristics for dynamic and stochastic routing in industrial shipping 

      Tirado, Gregorio; Hvattum, Lars Magnus; Fagerholt, Kjetil; Cordeau, Jean-François (Journal article; Peer reviewed, 2012)
      Maritime transportation plays a central role in international trade, being responsible for the majority of long-distance shipments in terms of volume. One of the key aspects in the planning of maritime transportation systems ...
    • A high-fidelity approach to modeling weather-dependent fuel consumption on ship routes with speed optimization 

      Ormevik, Andreas Breivik; Fagerholt, Kjetil; Meisel, Frank; Sandvik, Endre (Peer reviewed; Journal article, 2023)
      In this paper, we present the scheduling problem on a given route where speed optimization under various weather conditions is to be performed. Different approaches for calculating fuel consumption for vessels are introduced ...
    • Impact of simulation model fidelity and simulation method on ship operational performance evaluation in sea passage scenarios 

      Nielsen, Jørgen Bremnes; Sandvik, Endre; Pedersen, Eilif; Asbjørnslett, Bjørn Egil; Fagerholt, Kjetil (Journal article; Peer reviewed, 2019)
      In this paper, we present and investigate important factors that influence a vessels fuel consumption during operation and what model fidelity that is required to adequately capture these factors in fuel consumption ...
    • Industrial and Tramp Ship Routing Problems: Closing the Gap for Real-Scale Instances 

      Homsi, Gabriel; Martinelli, Rafael; Vidal, Thibaut; Fagerholt, Kjetil (Peer reviewed; Journal article, 2019)
      Recent studies in maritime logistics have introduced a general ship routing problem and a benchmark suite based on real shipping segments, considering pickups and deliveries, cargo selection, ship-dependent starting ...
    • Joint relocation and pricing in electric car-sharing systems 

      Eilertsen, Ulrik; Falck-Pedersen, Olav Mattias; Henriksen, Jone Våge; Fagerholt, Kjetil; Pantuso, Giovanni (Journal article; Peer reviewed, 2023)
      In this paper we study the integrated planning problem of determining car-sharing prices between zones of the operating area and routing employees (operators) to relocate cars in preparation for future uncertain demand. ...
    • Kindergarten allocation in Norway: An integer programming approach 

      Geitle, Anders Hasson; Johnsen, Øyvind Knutsen; Ruud, Håkon Fredrik; Fagerholt, Kjetil; Julsvoll, Carl Andreas (Peer reviewed; Journal article, 2020)
      Kindergartens are vital to society in many countries, and in Norway, the municipalities are the local authorities that facilitate a coordinated admission process involving all their kindergartens. Allocating children to ...