Now showing items 175-194 of 206

    • Short-Term Load Forecasting with Missing Data using Dilated Recurrent Attention Networks 

      Choi, Changkyu; Bianchi, Filippo Maria; Kampffmeyer, Michael; Jenssen, Robert (Peer reviewed; Journal article, 2020)
      Forecasting the dynamics of time-varying systems is essential to maintaining the sustainability of the systems. Recent studies have discovered that Recurrent Neural Networks(RNN) applied in the forecasting tasks outperform ...
    • Simulating offshore hydrogen production via PEM electrolysis using real power production data from a 2.3 MW floating offshore wind turbine 

      Egeland-Eriksen, Torbjørn; Flatgård Jensen, Jonas; Ulleberg, Øystein; Sartori, Sabrina (Peer reviewed; Journal article, 2023)
      This work presents simulation results from a system where offshore wind power is used to produce hydrogen via electrolysis. Real-world data from a 2.3 MW floating offshore wind turbine and electricity price data from Nord ...
    • Simulation-driven Deep Classification of Bearing Faults from Raw Vibration Data 

      Hemmer, Martin; Klausen, Andreas; Huynh, Khang; Robbersmyr, Kjell Gunnar; Waag, Tor Inge (Peer reviewed; Journal article, 2019)
      The industry is moving towards maintenance strategies that consider component health, which require extensive collection and analysis of data. Condition monitoring methods that require manual feature extraction and analysis, ...
    • SIOS’s Earth Observation (EO), Remote Sensing (RS), and operational activities in response to COVID-19 

      Jawak, Shridhar D.; Andersen, Bo N.; Pohjola, Veijo; Godøy, Øystein; Hübner, Christiane E.; Jennings, Inger; Ignatiuk, Dariusz; Holmen, Kim; Sivertsen, Agnar; Hann, Richard; Tømmervik, Hans; Kääb, Andreas; Błaszczyk, Małgorzata; Salzano, Roberto; Luks, Bartłomiej; Høgda, Kjell Arild; Storvold, Rune; Nilsen, Lennart; Salvatori, Rosamaria; Krishnan, Kottekkatu Padinchati; Chatterjee, Sourav; Lorentzen, Dag Arne; Erlandsson, Rasmus; Lauknes, Tom Rune; Malnes, Eirik; Karlsen, Stein Rune; Enomoto, Hiroyuki; Fjæraa, Ann Mari; Zhang, Jie; Marty, Sabine; Nygård, Knut Ove; Lihavainen, Heikki (Journal article; Peer reviewed, 2021)
      Svalbard Integrated Arctic Earth Observing System (SIOS) is an international partnership of research institutions studying the environment and climate in and around Svalbard. SIOS is developing an efficient observing system, ...
    • Skin and Proximity Effects in Electrodes and Furnace Shells 

      Herland, Egil Vålandsmyr; Sparta, Manuel; Halvorsen, Svenn Anton (Peer reviewed; Journal article, 2019)
      A review of two-dimensional (2D) analytical models of skin and proximity effects in large industrial furnaces with three electrodes arranged in an equilateral triangle is given. The models cover three different cases: one ...
    • Spectral Clustering with Graph Neural Networks for Graph Pooling 

      Bianchi, Filippo Maria; Grattarola, Daniele; Alippi, Cesare (Peer reviewed; Journal article, 2020)
      Spectral clustering (SC) is a popular clustering technique to find strongly connected communities on a graph. SC can be used in Graph Neural Networks (GNNs) to implement pooling operations that aggregate nodes belonging ...
    • Spread Spectrum Modulation with Grassmannian Constellations for Mobile Multiple Access Underwater Acoustic Channels 

      Bernard, Christophe; Bouvet, Pierre-Jean; Tomasi, Beatrice (Journal article; Peer reviewed, 2022)
      The objective of this study is to evaluate Grassmannian constellations combined with a spread spectrum multiple access scheme for underwater acoustic mobile multiple access communication systems. These communication systems ...
    • A Stochastic Covariance Shrinkage Approach in Ensemble Transform Kalman Filtering 

      Popov, Andrey A.; Sandu, Adrian; Nino-Ruiz, Elias D.; Evensen, Geir (Peer reviewed; Journal article, 2023)
      The Ensemble Kalman Filters (EnKF) employ a Monte-Carlo approach to represent covariance information, and are affected by sampling errors in operational settings where the number of model realizations is much smaller than ...
    • 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, ...
    • A Survey on Distributed Fibre Optic Sensor Data Modelling Techniques and Machine Learning Algorithms for Multiphase Fluid Flow Estimation 

      Arief, Hasan Asyari; Wiktorski, Tomasz; Thomas, Peter (Peer reviewed; Journal article, 2021)
      Real-time monitoring of multiphase fluid flows with distributed fibre optic sensing has the potential to play a major role in industrial flow measurement applications. One such application is the optimization of hydrocarbon ...
    • Tectonic-magmatic-hydrothermal interactions in a hot dry rock geothermal system: The role of the transfer and normal faults in the Acoculco caldera (Mexico) 

      Liotta, Domenico; Brogi, Andrea; Wheeler, Walter H; Bastesen, Eivind; Garduño-Monroy, Victor Hugo; Macias, José Luis; Sosa-Ceballos, Giovanni; Pola, Antonio; Avellán, Denis-Ramón; Bianco, Caterina; Olvera-García, Emmanuel; Gómez-Alvarez, Fidel; Israde-Alcantara, Isabel; Jiménez-Haro, Adrian; Piccardi, Luigi; Zucchi, Martina (Peer reviewed; Journal article, 2023)
      In the Acoculco caldera (hot dry rock system) two geothermal boreholes were planned to intersect fracture systems in the carbonate basement. Even though the caldera is located in an area of active deformation with high ...
    • The association of PTSD symptom severity with amygdala nuclei volumes in traumatized youths 

      Ousdal, Olga Therese; Milde, Anne Marita; Hafstad, Gertrud Sofie; Hodneland, Erlend; Dyb, Grete; Craven, Alexander R.; Melinder, Annika Maria D; Endestad, Tor; Hugdahl, Kenneth (Peer reviewed; Journal article, 2020)
      The amygdala is a core component in neurobiological models of stress and stress-related pathologies, including post-traumatic stress disorder (PTSD). While numerous studies have reported increased amygdala activity following ...
    • The dissolution of a miscible drop rising or falling in another liquid at low Reynolds number 

      Nordbotten, Jan Martin; Mossige, Joachim (Peer reviewed; Journal article, 2023)
      “A basic and basically unsolved problem in fluid dynamics is to determine the evolution of rising bubbles and falling drops of one miscible liquid in another” [D. D. Joseph and Y. Y. Renardy, Fundamentals of Two-Fluid ...
    • The generalization of Gulland’s method: How to estimate maturity ogives when juvenile data are missing while spawner demography is known 

      Heino, Mikko Petteri; Godø, Olav Rune; Dieckmann, Ulf (Peer reviewed; Journal article, 2019)
      The proportions of mature individuals at age or length, collectively known as the maturity ogive, are a key population characteristic and serve as critical input to age-disaggregated stock assessments. John Gulland showed ...
    • The Open Porous Media Flow Reservoir Simulator 

      Rasmussen, Atgeirr Flø; Sandve, Tor Harald; Bao, Kai; Lauser, Andreas; Hove, Joakim; Skaflestad, Bård; Klöfkorn, Robert; Blatt, Markus; Rustad, Alf Birger; Sævareid, Ove; Lie, Knut-Andreas; Thune, Andreas (Peer reviewed; Journal article, 2020)
      The Open Porous Media (OPM) initiative is a community effort that encourages open innovation and reproducible research for simulation of porous media processes. OPM coordinates collaborative software development, maintains ...
    • Tidal amplification and along‐strike process variability in a mixed‐energy paralic system prograding onto a low accommodation shelf, Edgeøya, Svalbard 

      Anell, Ingrid Margareta; Zuchuat, Valentin; Röhnert, A.D.; Smyrak-Sikora, Aleksandra; Buckley, Simon John; Lord, Gareth Steven; Maher, H.; Midtkandal, Ivar; Ogata, Kei; Olaussen, Snorre; Osmundsen, Per Terje; Braathen, Alvar (Journal article; Peer reviewed, 2020)
      The study describes the depositional development and sediment partitioning in a prograding paralic Triassic succession. The deposits are associated with the advance of large prism‐scale clinoforms across a shallower platform ...
    • Treatment fidelity in a pragmatic clinical trial of music therapy for premature infants and their parents: the LongSTEP study 

      Gaden, Tora Söderström; Gold, Christian; Assmus, Jörg; Kvestad, Ingrid; Stordal, Andreas Størksen; Bieleninik, Lucja; Ghetti, Claire (Peer reviewed; Journal article, 2023)
      Background Treatment fidelity (TF) refers to methodological strategies used to monitor and enhance the reliability and validity of interventions. We evaluated TF in a pragmatic RCT of music therapy (MT) for premature ...
    • Triaxial behavior of a stabilized and a highly porous oil well cement paste at different saturation and drainage conditions 

      Lima, Victor Nogueira; Skadsem, Hans Joakim; Beltrán-Jiménez, Katherine; Zhemchuzhnikov, Alexandr; Velloso, Raquel Quadros; Silva, Flavio de Andrade (Peer reviewed; Journal article, 2022)
      Well cement is the most common barrier material in wells for geothermal and hydrocarbon production. As cements are exposed to hydrostatic loads and periods of deviatoric loading in wellbore environments, it is important ...
    • Uncovering Contributing Factors to Interruptions in the Power Grid: An Arctic Case 

      Eikeland, Odin Foldvik; Bianchi, Filippo Maria; Holmestrand, Inga Setså; Bakkejord, Sigurd; Santos, Sergio; Chiesa, Matteo (Peer reviewed; Journal article, 2022)
      Electric failures are a problem for customers and grid operators. Identifying causes and localizing the source of failures in the grid is critical. Here, we focus on a specific power grid in the Arctic region of Northern ...
    • Underwater noise from wind at the high north LoVe ocean observatory 

      Ødegaard, Lars Alf; Pedersen, Geir; Johnsen, Espen (Peer reviewed; Journal article, 2019)
      The Lofoten-Vesterålen (LoVe) Cabled Ocean Observatory is located in an oceanographic, ecological, and economical hotspot off the Northern Norwegian cost. The observatory is a national research infrastructure under development ...