• Time to Rescue for Different Paths to Survival Following a Marine Incident 

      Solberg, Knut Espen; Jensen, Jan Erik; Barane, Endre; Hagen, Snorre; Kjøl, Andreas; Johansen, Gudmund; Gudmestad, Ove Tobias (Peer reviewed; Journal article, 2020-12)
      The time required for rescue is a critical factor for surviving a marine incident. The regulatory framework, International Maritime Organization (IMO) Polar Code, utilizes a risk-based approach. It states that the vessel ...
    • Topology optimization through stiffness/weight ratio analysis for a three-point bending test of additive manufactured parts 

      Garcia-Granada, Andres; Catafal-Pedragosa, Joan; Lemu, Hirpa G. (Peer reviewed; Journal article, 2019)
      Topology Optimization (TO) is a technique that allows for increasingly efficient designs and its objective is to maximize the performance of mechanical systems or structure in a variety of fields. Attempts to employ TO for ...
    • Trajectory Envelope of a Subsea Shuttle Tanker Hovering in Stochastic Ocean Current - Model Development and Tuning 

      Ma, Yucong; Xing, Yihan; Sui, Dan (Peer reviewed; Journal article, 2022)
      A subsea shuttle tanker (SST) concept for liquid carbon dioxide transportation was recently proposed to support studies evaluating the ultra-efficient underwater cargo submarine concept. One important topic is the position ...
    • Transitioning towards renewable energy and sustainable storage solutions at remote communities in the Arctic, Case study of Flatey, Iceland 

      Hjallar, Milla; Vidisdottir, Elena Dis; Gudmestad, Ove Tobias (Peer reviewed; Journal article, 2023)
      The need for transitioning towards renwable energy and sustainable storage solutions is particularly challenging for remote communities in the Arctic, located far away from the electricity grid. This paper explores the ...
    • Trends in seismic data acquisition in areas with surface ice 

      Hussain, Azeem; Gudmestad, Ove Tobias; Barabady, Javad (Peer reviewed; Journal article, 2019)
      The Arctic has great significance in relation to the exploration and exploitation of its huge petroleum resources. Seismic surveys are the key part of petroleum exploration. Reflected sound waves are used to produce a 3D ...
    • Trends of using polymer composite materials in additive manufacturing 

      Regassa, Yohannes; Lemu, Hirpa G.; Sirabizuh, Belete (Peer reviewed; Journal article, 2019)
      Additive manufacturing (AM) technology is nowadays one of the advanced manufacturing technologies used to convert three dimensional product data to physical objects without any special tooling. The emergence of the technology ...
    • Triple-lidar measurements of wind across a virtual rotor plane over a sea surface 

      Nafisifard, Mohammad; Jakobsen, Jasna Bogunovic; Snæbjörnsson, Jonas Thor; Sjøholm, Mikael; Mann, Jakob (Peer reviewed; Journal article, 2023)
      An improved understanding of the spatiotemporal characteristics of the wind velocity field above the sea surface will benefit the design of modern offshore wind turbines. This study examines wind velocity data recorded on ...
    • Tuning for robust and optimal dynamic positioning control in BlueROV2 

      Yang, Xu; Xing, Yihan (Peer reviewed; Journal article, 2021)
      A tuning approach for the robust and optimal dynamic positioning control of BlueROV2 subjected to currents with varying speeds and headings is presented. A 2D planar dynamic model of BlueROV2 is developed in Matlab/Simulink ...
    • Turbulence in a coastal environment: the case of Vindeby 

      Putri, Rieska Mawarni; Cheynet, Etienne; Obhrai, Charlotte; Jakobsen, Jasna Bogunovic (Journal article; Peer reviewed, 2022-08-11)
      The one-point and two-point power spectral densities of the wind velocity fluctuations are studied using the observations from an offshore mast at Vindeby Offshore Wind Farm, for a wide range of thermal stratifications of ...
    • Two-body dynamic simulations of a combined semi-submersible floating offshore wind turbine and torus wave energy converter 

      Lee, Chern Fong; Tavares, Vitor De Santis; Ong, Muk Chen (Peer reviewed; Journal article, 2023)
      Dynamic responses of a combined wind and wave energy system which consist of a 5MW semi-submersible floating offshore wind turbine (FOWT) and a torus-shaped wave energy converter (WEC) are investigated. In the investigated ...
    • Typical hydrodynamic models for aquaculture nets: A comparative study under pure current conditions 

      Cheng, Hui; Li, Lin; Aarsæther, Karl Gunnar; Ong, Muk Chen (Peer reviewed; Journal article, 2020-03)
      The net is regarded as the most critical component in marine aquaculture facilities as it is the only barrier which protects the environment from fish escapes. Accurate predictions of the net cage deformation and drag force ...
    • UiS Subsea-Freight Glider: A large buoyancy-driven autonomous cargo glider 

      Ahmad, Usman Nawaz; Xing, Yihan; Ma, Yucong (Peer reviewed; Journal article, 2022)
      This study presents the baseline design for the autonomous subsea vehicle capable of traveling at a lower speed of 1 m/s with an operating range of 400 km. Owing to UiS subsea-freight glider’s (USFG) exceedingly economical ...
    • Uncertainties in current measurements in the northern North Sea 

      Bruserud, Kjersti; Haver, Sverre Kristian (Journal article; Peer reviewed, 2017)
      A met–ocean measurement program of waves and current profiles at five locations in the northern North Sea was performed over a period of approximately 5 years. Despite quality control, the measured current speed data ...
    • Unfrozen Skewed Turbulence for Wind Loading on Structures 

      Cheynet, Etienne; Daniotti, Nicolo; Jakobsen, Jasna Bogunovic; Snæbjørnsson, Jonas Thor; Wang, Jungao (Peer reviewed; Journal article, 2022)
      The paper introduces an algorithm to generate a three-variate four-dimensional wind turbulence field suited for yawed wind dynamic load simulation. At large yaw angles, a relaxation of Taylor’s hypothesis of frozen turbulence ...
    • Unlocking Household Electricity Consumption in Pakistan 

      Amber, Khuram Pervez; Ahmad, Rizwan; Farmanbar, Mina; Bashir, Muhammad Anser; Mehmood, Sajid; Khan, Muhammad Sajid; Saeed, Muhammad Umer (Peer reviewed; Journal article, 2021-11)
      In Pakistan, data for household electricity consumption are available in the form of monthly electricity bills only, and, therefore, are not helpful in establishing appliance-wise consumption. Further, it does not help in ...
    • Unsteady RANS Simulations of Flow around a Twin-Box Bridge Girder Cross Section 

      Jeong, Wonmin; Liu, Shengnan; Jakobsen, Jasna Bogunovic; Ong, Muk Chen (Journal article; Peer reviewed, 2019-07)
      The aerodynamic performance of bridge deck girders requires a thorough assessment and optimization in the design of long-span bridges. The present paper describes a numerical investigation of the aerodynamic characteristics ...
    • Use of circular economy practices during the renovation of old buildings in developing countries 

      Silva, Sudhira; Samarakoon, Samarakoon Mudiyansele Samindi; Haq, M.A.A. (Peer reviewed; Journal article, 2023)
      The construction industry is responsible for over 30% of global natural resource extraction and 25% of solid waste production, primarily due to its prevalent "take, make, dispose" economic model. Shifting toward a circular ...
    • Use of digital technology to follow the consequences of a warming Arctic climate 

      Myrmel, Liv Brita Hætta; Gudmestad, Ove Tobias (Peer reviewed; Journal article, 2021)
      The rapid warming climate is causing the Arctic ice to retreat and the permafrost to melt. These visible manifestations of the ongoing climate change are few of many environmental and societal changes that take place in ...
    • Use of response forecasting in decision making for weather sensitive offshore construction work 

      Døskeland, Øystein Husevåg; Gudmestad, Ove Tobias; Moen, Petter (Peer reviewed; Journal article, 2023)
      Response forecasting is an emerging technology for supporting decision-making during offshore construction work. The method aims to improve the reliability and efficiency of weather-sensitive operations. This article ...
    • Use of simulator training to mitigate risks in arctic shipping operations 

      Røds, Johan-Fredrik; Gudmestad, Ove Tobias (Peer reviewed; Journal article, 2019)
      Over the recent years, ship traffic in the polar areas has increased. There is reason to believe that this traffic, and especially the cruise traffic, will increase further as the ice retracts towards the poles. There is ...