Now showing items 3589-3608 of 5701

    • On Converting Crisp Failure Possibility into Probability for Reliability of Complex Systems 

      Sahin, Bekir; Yazidi, Anis; Roman, Dumitru; Uddin, Md Zia; Soylu, Ahmet (Peer reviewed; Journal article, 2021)
      The reliability of complex systems is analyzed based on several systematic steps using many safety engineering methods. The most common technique for safety system analysis and reliability, vulnerability and criticality ...
    • On corner cutting in multi-obstacle avoidance problems 

      Stoican, Florin; Grøtli, Esten Ingar; Prodan, Ionela; Oara, Cristian (Journal article, 2015)
      One challenging and not extensively studied issue in obstacle avoidance is the corner cutting problem. Avoidance constraints are usually imposed at the sampling time without regards to the intra-sample behavior of the ...
    • On Enhancing Visual Query Building over KGs Using Query Logs 

      Klungre, Vidar Norstein; Soylu, Ahmet; Giese, Martin; Waaler, Arild; Kharlamov, Evgeny (Journal article; Peer reviewed, 2018)
      Knowledge Graphs have recently gained a lot of attention and have been successfully applied in both academia and industry. Since KGs may be very large: they may contain millions of entities and triples relating them to ...
    • On intermetallic phases formed during interdiffusion between aluminium alloys and stainless steel 

      Bergh, Tina; Arbo, Siri Marthe; Hagen, Anette Brocks; Blindheim, Jørgen; Friis, Jesper; Khalid, Muhammad Zeeshan; Ringdalen, Inga Gudem; Holmestad, Randi; Westermann, Ida; Vullum, Per Erik (Peer reviewed; Journal article, 2022)
      One of the major challenges in welding of aluminium (Al) alloys and steels is the growth of brittle intermetallic phases, which depends on the thermomechanical processing history and the alloying elements. This work focuses ...
    • On Model Predictive Path Following and Trajectory Tracking for Industrial Robots 

      Arbo, Mathias Hauan; Grøtli, Esten Ingar; Gravdahl, Jan Tommy (Journal article; Peer reviewed, 2017)
      In this article the model predictive path following controller and the model predictive trajectory tracking con-troller are compared for a robotic manipulator. We consider both the Runge-Kutta and collocation based ...
    • On obtaining optimal well rates and placement for CO2 storage 

      Allen, Rebecca; Nilsen, Halvor Møll; Andersen, Odd; Lie, Knut-Andreas (Journal article; Peer reviewed, 2017)
      Large-scale storage of CO2 in saline aquifers is considered an essential technology to mitigate CO2 emissions. Storage potential has mainly been estimated based on volumetrics or detailed simulations for specific injection ...
    • On scenario construction for stochastic shortest path problems in real road networks 

      Zhang, Dongqing; Wallace, Stein William; Guo, Zhaoxia; Dong, Yucheng; Kaut, Michal (Peer reviewed; Journal article, 2021)
      Stochastic shortest path (SSP) computations are often performed under very strict time constraints, so computational efficiency is critical. A major determinant for the CPU time is the number of scenarios used. We demonstrate ...
    • On the Atomic Structure of the β′′ Precipitate by Density Functional Theory 

      Frafjord, Jonas; Ringdalen, Inga Gudem; Holmestad, Randi; Friis, Jesper (Peer reviewed; Journal article, 2023)
      The substitution of elements into the precipitate in the 6xxx-series of aluminium alloys is an interface sensitive problem. The strain caused by the misfit between the precipitate and the matrix interacts with the size ...
    • On the biogenicity of Fe-oxyhydroxide filaments in silicified low-temperature hydrothermal deposits: Implications for the identification of Fe-oxidizing bacteria in the rock record 

      Johannessen, Karen Cecilie; McLoughlin, Nicola; Vullum, Per Erik; Thorseth, Ingunn Hindenes (Journal article; Peer reviewed, 2019)
      Microaerophilic Fe(II)‐oxidizing bacteria produce biomineralized twisted and branched stalks, which are promising biosignatures of microbial Fe oxidation in ancient jaspers and iron formations. Extracellular Fe stalks ...
    • On the Certificate Revocation Problem in the Maritime Sector 

      Bour, Guillaume; Bernsmed, Karin; Meland, Per Håkon; Borgaonkar, Ravishankar Bhaskarrao (Peer reviewed; Journal article, 2021)
      Maritime shipping is currently undergoing rapid digitalization, but with increasing exposure to cyber threats, there is a need to improve the security of the ship communication technology used during operations across ...
    • On the Characteristics of Internal Software Startups 

      Tkalich, Anastasiia; Edison, Henry (Chapter, 2022)
      In recent years, more attention has been given to internal software startups in practice and in research alike, yet the concept is not fully understood. Nor is it clear whether or not it significantly differs from stand-alone ...
    • On the choice of closure complexity in anisotropic drag closures for filtered Two Fluid Models 

      Cloete, Jan Hendrik; Cloete, Schalk Willem Petrus; Radl, Stefan; Amini, Shahriar (Journal article; Peer reviewed, 2019)
      Filtered Two Fluid Models (fTFMs) aim to enable accurate industrial-scale simulations of fluidized beds by means of closures accounting for the effects of bubbles and clusters. The present study aims to improve anisotropic ...
    • On the cleansing and inspection of GPS ephemeris data 2000–2016 

      Lie, Arne; Morrison, Aiden; Sokolova, Nadezda; Topland, Morten (Chapter, 2017)
      Archived GPS ephemeris data for years 2000-2016 is investigated by cleansing and precision measures. The goal of this work was twofold: (1) to reveal and remove incorrect ephemeris data so that the cleansed data is as close ...
    • On the concept of sustainability - assessing th sustainability of large public Investment projects 

      Haavaldsen, Tore; Lædre, Ola; Volden, Gro Holst; Lohne, Jardar (Journal article; Peer reviewed, 2014)
      Assessing the sustainability of large public investment projects within the general framework of three-pillar thinking is a complex affair. Such ventures involve multiple actors – e.g. planners from various disciplines ...
    • On the Contextualization of Event-Activity Mappings 

      Koschmider, Agnes; Mannhardt, Felix; Tobias, Heuser (Journal article; Peer reviewed, 2019)
      Event log files are used as input to any process mining algorithm. A main assumption of process mining is that each event has been assigned to a distinct process activity already. However, such mapping of events to activities ...
    • On the dimension of multivariate spline spaces 

      Pettersen, Kjell Fredrik (SINTEF Rapport;, Research report, 2013)
      In this paper, we define the topological structures for an arbitrary axis-aligned box partition of a parametric d-dimensional box-shaped limited domain in R^d. Then we define the d-variate spline space over this partition ...
    • On the Direct Reduction Phenomena of Bauxite Ore Using H2 Gas in a Fixed Bed Reactor 

      Lazou, Adamantia; Eijk, Casper van der; Balomenos, Efthymios; Kolbeinsen, Leiv; Safarian, Jafar (Peer reviewed; Journal article, 2020)
      The Bayer Process is the dominant industrial method to produce alumina from bauxite ore. Due to the generation of large amounts of Bauxite Residue (red mud), an alternative method, called the Pedersen Process, is of our ...
    • On the effect of calcium lignosulfonate on the rheology and setting time of cement paste 

      Colombo, Alessia; Geiker, Mette Rica; Justnes, Harald; Lauten, Rolf Andreas; De Weerdt, Klaartje (Journal article; Peer reviewed, 2017)
      The effect of softwood calcium lignosulfonate, LSs, on the rheology and setting time of cement paste has been investigated. Two Portland cements with different surface area and C3A content were used. The lignosulfonate was ...
    • On the effect of co2 on seismic and ultrasonic properties: A novel shale experiment 

      Rørheim, Stian; Bhuiyan, Mohammad Hossain; Bauer, Andreas; Cerasi, Pierre (Peer reviewed; Journal article, 2021)
      Carbon capture and storage (CCS) by geological sequestration comprises a permeable formation (reservoir) for CO2 storage topped by an impermeable formation (caprock). Time-lapse (4D) seismic is used to map CO2 movement in ...
    • On the Evolution of Stress and Microstructure in Radio Frequency-Sputtered Lead-Free (Ba,Ca)(Zr,Ti)O3 Thin Films 

      Dahl-Hansen, Runar Plunnecke; Stange, Marit Synnøve Sæverud; Sunde, Tor Olav Løveng; Ræder, Johan Henrik; Rørvik, Per Martin Ljønes (Peer reviewed; Journal article, 2024)
      Thin-film piezoelectrics are widely investigated for actuators and energy harvesters, but there are few alternatives to toxic lead zirconate titanate. Biocompatible Ca- and Zr-modified BaTiO3 (BCZT) is one of the most ...