Faculty of Science and Technology: Recent submissions

Now showing items 1441-1460 of 7365

    • Green communication approach for the smart city using renewable energy systems 

      Hsu, Ching-Hsien; Eshwarappa, Nithin Melala; Chang, Wen-Thong; Chunming, Rong; Zhang, Wei-Zhe; Huang, Jun (Peer reviewed; Journal article, 2022)
      A smart city is an evolving Internet of Things (IoT) technique that links different digital gadgets via a network, offering several new services to the manufacturing and medical field to commerce. A smart city is an ...

    • Exploiting epistemic uncertainty of the deep learning models to generate adversarial samples 

      Tuna, Omer Faruk; Catak, Ferhat Özgur; Eskil, Taner (Peer reviewed; Journal article, 2022)
      Deep neural network (DNN) architectures are considered to be robust to random perturbations. Nevertheless, it was shown that they could be severely vulnerable to slight but carefully crafted perturbations of the input, ...

    • Safety and reliability improvement of valves and actuators in the offshore oil and gas industry 

      Sotoodeh, Karan; Gudmestad, Ove Tobias (Peer reviewed; Journal article, 2022)
      Valve failure is a major risk and a costly phenomenon in the offshore sector of the oil and gas industry. It results in severe negative consequences, such as a loss of assets, a loss of production due to plant shutdowns, ...

    • Internal Corrosion Damage Mechanisms of the Underground Water Pipelines 

      Yeshanew, Desalegn A.; Jiru, Moera G.; Lemu, Hirpa Gelgele; Tolcha, Mesay A. (Peer reviewed; Journal article, 2022)
      Internal water pipe corrosion is a complicated problem due to the interaction of water quality parameters with pipe wall. This study presents investigations of internal pipe surface corrosion mechanisms related to water ...

    • Contact temperature analysis of the classical Geneva mechanism through numerical methods 

      Ambaye, Getachew A.; Lemu, Hirpa Gelgele; Tolcha, Mesay A. (Peer reviewed; Journal article, 2022)
      In this study, the flash temperature of the classical Geneva mechanism has been studied using the numer- ical method. An excessive sliding motion between the wheel and pin leads to the generation of heat at the contact ...

    • Modal analysis of offshore monopile wind turbine: An analytical solution 

      Pezeshki, Hadi; Pavlou, Dimitrios; Adeli, Hojjat; Siriwardane, Sudath C. (Peer reviewed; Journal article, 2022)
      An analytical solution of the dynamic response of offshore wind turbines under wave load with nonlinear Stokes’s wave theory and wave–structure and soil–foundation interactions is developed. Natural frequencies and the ...

    • Theoretical Comparison of Two Setups for Capillary Pressure Measurement by Centrifuge 

      Abbasi, Jassem; Andersen, Pål Østebø (Peer reviewed; Journal article, 2022)
      There are several approaches for the calculation of capillary pressure curves in porous media including the centrifuge method. In this work, a new installation of centrifuge test is introduced and compared with the traditional ...

    • Improving public cancer care by implementing precision medicine in Norway: IMPRESS-Norway 

      Helland, Åslaug; Russnes, Hege Elisabeth Giercksky; Fagereng, Gro Live; Al-Shibli, Khalid Ibrahim; Andersson, Yvonne; Berg, Thomas; Bjørge, Line; Blix, Egil Støre; Bjerkehagen, Bodil; Brabrand, Sigmund; CAMERON, MARTE; Dalhaug, Astrid; Dietzel, Dalia; Dønnem, Tom; Enerly, Espen; Flobak, Åsmund; Fluge, Sverre; Gilje, Bjørnar; Gjertsen, Bjørn Tore; Grønberg, Bjørn Henning; Grønås, Kari; Guren, Tormod Kyrre; Hamre, Hanne Mari; Haug, Åse; Heinrich, Daniel; Hjortland, Geir Olav; Hovig, Eivind; Hovland, Randi; Iversen, Ann-Charlotte; Janssen, Emiel; Kyte, Jon A; Gythfeldt, Hedda; Lothe, Ragnhild Adelheid; Lund, Jo-Åsmund; Meza, Leonardo Zepeda; Munthe-Kaas, Monica Cheng; Nguyen, Olav Toai Duc; Niehusmann, Pitt; Nilsen, Hilde; Puco, Katarina; Ree, Anne Hansen; Riste, Tonje Bøyum; Semb, Karin; Steinskog, Eli Sihn Samdal; Stensvold, Andreas; Suhrke, Pål; Tennøe, Øyvind Krohn; Tjønnfjord, Geir Erland; Vassbotn, Liv Jorunn; Aas, Eline; Aasebø, Kristine Øverås; Tasken, Kjetil; Smeland, Sigbjørn (Peer reviewed; Journal article, 2022)
      Background Matching treatment based on tumour molecular characteristics has revolutionized the treatment of some cancers and has given hope to many patients. Although personalized cancer care is an old concept, renewed ...

    • Investigation of Lactam- Based Kinetic Hydrate Inhibitors and the Synergetic Effect of Solvents 

      Dirdal, Erik Gisle (PhD thesis UiS;, Doctoral thesis, 2022)
      Gas hydrate formation in flow lines is of notorious concern for the oil and gas industry, and it only gets bigger because of the never-ending pursuit of oil and gas compels the industry into deeper and colder waters. Gas ...

    • 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 ...

    • Experimental Bench-Scale Study on Cuttings-Bed Erosion in Horizontal Wells 

      Pedrosa Consicion, Herman Camilo; Lund, Bjørnar; Opedal, Nils van der Tuuk; Ytrehus, Jan David; Saasen, Arild (Peer reviewed; Journal article, 2022)
      Cuttings-beds formation while drilling wellbores is a common challenge, especially for horizontal wells, as drilled particles have higher area to be deposited and form cuttings-beds, which can cause several problems such ...

    • Surface Complexation Modelling of Wettability Alteration during Carbonated Water Flooding 

      Mehdiyev, Fagan; Erzuah, Samuel; Omekeh, Aruoture Voke; Fjelde, Ingebret (Peer reviewed; Journal article, 2022)
      CO2 capture and utilization is an effective tool in reducing greenhouse gas emissions and hence, combating global warming. In the present study, surface complexation modeling (SCM) with the geochemistry solver, PHREEQ-C, ...

    • In-medium kinetic theory of D mesons and heavy-flavor transport coefficients 

      Torres-Rincon, Juan M.; Montaña, Glòria; Ramos, Àngels; Rigueiro, Laura Tolos (Peer reviewed; Journal article, 2022)
      We extend the kinetic theory of D mesons to accommodate thermal and off-shell effects due to the medium modification of the heavy-meson spectral functions. From the Kadanoff-Baym approach we derive the off-shell Fokker-Planck ...

    • Reduction of Hf via Hf/Zr Substitution in Mechanically Alloyed (Hf,Ti)CoSb Half-Heusler Solid Solutions 

      Ioannou, Ioanna; Delimitis, Andreas; Gelbstein, Yaniv; Kyratsi, Theodora (Peer reviewed; Journal article, 2022)
      Abstract (Hf,Zr,Ti)Co(Sb,Sn) Solid solutions were prepared by mechanical-alloying followed by hot-press method as an attempt to reduce Hf concentration and therefore the material’s cost without negatively affecting the ...

    • Experimental and Numerical Studies of Stress Distribution in an Expanding Pin Joint System 

      Salahshour Langeroodi, Soheil; Karlsen, Øyvind; Lemu, Hirpa G. (Peer reviewed; Journal article, 2022)
      Pin joints are widely used mechanisms in different industrial machineries such as aircrafts, cranes, ships, and offshore drilling equipment providing a joint with possibility of relative rotation about one single axis. The ...

    • Integrating big data and blockchain to manage energy smart grid - TOTEM framework 

      Therese Jose, Dhanya; Holme, Jørgen; Chakravorty, Antorweep; Chunming, Rong (Peer reviewed; Journal article, 2022)
      The demand for electricity is increasing exponentially day by day, especially with the arrival of electric vehicles. In the smart community neighborhood project, electricity should be produced at the household or community ...

    • Effect of Zn2+ and K+ as Retarding Agents on Rock-Based Geopolymers for Downhole Cementing Operations 

      Chamssine, Fawzi; Khalifeh, Mahmoud; Saasen, Arild (Peer reviewed; Journal article, 2022)
      Geopolymer material has a potential to function alongside Portland Cement as an efficient cementitious material for well cementing and plug and abandonment applications. Geopolymer material requires retarding agents to be ...

    • Global markets and the commons: The role of imports in the US wild-caught shrimp market 

      Asche, Frank; Oglend, Atle; Smith, Martin D. (Peer reviewed; Journal article, 2022)
      The commons literature focuses heavily on rules and the behavior of resource users but places less emphasis on the returns to individual effort. However, for most resource settings, market conditions and associated resource ...

    • Challenges and opportunities: impacts of COVID-19 on Norwegian seafood exports 

      Asche, Frank; Straume, Hans-Martin; Garlock, Taryn M.; Johansen, Ulf; Kvamsdal, Sturla Furunes; Nygård, Rune; Pincinato, Ruth Beatriz; Tveterås, Ragnar (Peer reviewed; Journal article, 2022)
      A rapidly growing literature shows that COVID-19 and the measures to contain the spread of the virus can have significant market impacts for seafood. These can be interruptions of production, or reductions in demand directly ...

    • Metric based virtual simulation training for endovascular thrombectomy improves interventional neuroradiologists’ simulator performance 

      Schneider, Magnus Sundgot; Sandve, Knut Olav Lende; Kurz, Kathinka Dæhli; Dalen, Ingvild; Ospel, Johanna; Goyal, Mayank; Kurz, Friedrich Martin Wilhelm; Fjetland, Lars (Peer reviewed; Journal article, 2022)
      Objective Metric based virtual reality simulation training may enhance the capability of interventional neuroradiologists (INR) to perform endovascular thrombectomy. As pilot for a national simulation study we examined ...