Browsing Publikasjoner fra CRIStin - NTNU by Title

Now showing items 36979-36998 of 37646

    • Water–Gas Shift Activity of Pt Catalysts Prepared by Different Methods 

      Bjørkan, Hilde; Rønning, Magnus; Venvik, Hilde Johnsen; Johannessen, Tue; Holmen, Anders (Peer reviewed; Journal article, 2020)
      Platinum supported on ceria and zirconia was prepared through different preparation methods: Coprecipitation (CP), spray drying (SD), and flame spray pyrolysis (FSP). The catalysts were characterized by XRD, TPR, N2 ...

    • Watt-level Kerr-Lens Mode-Locked Cr:ZnS Laser at 2.4 μm 

      Tolstik, Nikolai; Sorokin, E; Sorokina, Irina T (Chapter, 2013)
      Power scaling of Kerr-lens mode-locked Cr:ZnS femtosecond oscillator allows reaching 1 W output power and pulse energies over 8 nJ. Soliton and chirped-pulse regimes result in 68 fs and 0.8-2 ps pulses, respectively.

    • wav2vec2-based Speech Rating System for Children with Speech Sound Disorder 

      Gertman, Yaroslav; Al-Ghezi, Ragheb; Voskoboinik, Ekaterina; Grósz, Tamás; Kurimo, Mikko; Salvi, Giampiero; Svendsen, Torbjørn Karl; Strömbergsson, Sofia (Peer reviewed; Journal article, 2022)
      Speaking is a fundamental way of communication, developed at a young age. Unfortunately, some children with speech sound disorder struggle to acquire this skill, hindering their ability to communicate efficiently. Speech ...

    • Wave and Current Effects on Floating Fish Farms 

      Faltinsen, Odd Magnus; Shen, Yugao (Journal article; Peer reviewed, 2018)
      The paper is partly a review on hydrodynamic and structural aspects of fish farms. In addition, new numerical results are presented on the stochastic behavior of bending stresses in the floater of a realistic net cage in ...

    • Wave conditions encountered by ships—A report from a larger shipping company based on ERA5 

      Nielsen, Ulrik D.; Ikonomakis, Angelos (Peer reviewed; Journal article, 2021)
      This study reports about the wave conditions encountered by the fleet of Maersk Line. Herein, wave conditions refer to integral wave parameters in terms of significant wave height, zero-upcrossing period, and wave direction ...

    • Wave dispersion in moderate channel turbulence 

      Pilloton, Chiara; Lugni, Claudio; Graziani, Giorgio; Fedele, Francesco (Peer reviewed; Journal article, 2023)
      We study channel turbulence by interpreting its vorticity as a random sea of ocean wave packet analogues. In particular, we investigate the ocean-like properties of vortical packets applying stochastic methods developed ...

    • Wave disturbance rejection for monopile offshore wind turbines 

      Smilden, Emil; Bachynski, Erin Elizabeth; Sørensen, Asgeir Johan; Amdahl, Jørgen (Journal article; Peer reviewed, 2019)
      The dimensions of offshore wind turbine (OWT) support structures are governed by fatigue considerations. For 6‐ to 10‐MW OWTs, wave loads are often dominating in terms of fatigue utilization. The present work proposes a ...

    • Wave inhomogeneities in a wave basin of constant water depth 

      Lafleche, Sebastien Jacques Marie; Ommani, Babak; Kristiansen, Trygve; Fouques, Sebastien (Journal article; Peer reviewed, 2023)
      Experimental testing of large marine structures in hydrodynamic laboratories requires an accurate reproduction of waves over a large area of the basin. However, with a uniform motion of the wavemaker, wave interactions ...

    • Wave load effect analysis of a floating bridge in a fjord considering inhomogeneous wave conditions 

      Cheng, Zhengshun; Gao, Zhen; Moan, Torgeir (Journal article; Peer reviewed, 2018)
      When designing a floating bridge crossing a deep and wide fjord, a homogeneous wave field is usually assumed for simplicity. However, waves in fjords are commonly inhomogeneous, and hence the mentioned design practice ...

    • Wave motion compensation in dynamic positioning of small autonomous vessels 

      Halvorsen, Håkon Skogland; Øveraas, Henning; Landstad, Olav; Smines, Vidar; Fossen, Thor I.; Johansen, Tor Arne (Peer reviewed; Journal article, 2020)
      Conventional dynamic positioning (DP) systems on larger ships compensate primarily for slowly time-varying environmental forces. In doing so, they use wave filtering to prevent the DP from compensating for the first-order ...

    • Wave power statistics for sea states based on wind statistics 

      Myrhaug, Dag (Journal article; Peer reviewed, 2018)
      The paper addresses how the wave power for sea states can be assessed based on available wind statistics for an ocean area. Results using a simple analytical tool are exemplified for a Pierson–Moskowitz wave spectrum ...

    • Wave Propagation Along a Thin Wire Antenna Placed in a Horizontally Layered Medium 

      Wei, Yingkang; Holter, Bengt; Simonsen, Ingve; Husby, Karsten; Kuhnle, Jacob; Norum, Lars Einar (Chapter, 2010)

    • Wave propagation in multicomponent flow models 

      Flåtten, Tore; Morin, Alexandre; Munkejord, Svend Tollak (Journal article; Peer reviewed, 2010)
      We consider systems of hyperbolic balance laws governing flows of an arbitrary number of components equipped with general equations of state. The components are assumed to be immiscible. We compare two such models: one in ...

    • Wave response of closed flexible bags 

      Lader, Pål; Fredriksson, David W.; Volent, Zsolt; DeCew, Jud; Rosten, Trond Waldemar; Strand, Ida Marlen (Journal article; Peer reviewed, 2017)
      Recent environmental considerations, as salmon lice, escape of farmed fish and release of nutrients, have prompted the aquaculture industry to consider the use of closed fish production systems (CFPS). The use of such ...

    • Wave runup and wave rundown estimation based on long-term variation of wind statistics 

      Myrhaug, Dag; Sunde, Tonje (Journal article; Peer reviewed, 2018)
      The paper presents a simple analytical method that can be used to estimate wave runup (RU) and wave rundown (RD) on shorelines and coastal structures for sea states based on long-term wind statistics. Eight different ...

    • Wave- and wind-induced responses of the semisubmersible wind energy and flap-type wave energy converter based on experiments 

      Michailides, Constantine; Gao, Zhen; Moan, Torgeir (Journal article; Peer reviewed, 2017)
      This paper deals with a study of wave and wind induced responses of the combined energy concept SFC in operational and survival conditions based on experimental data. The measured responses that are studied include motions ...

    • Wave-Induced Accelerations of a Fish-Farm Elastic Floater: Experimental and Numerical Studies 

      Li, Peng; Faltinsen, Odd Magnus; Greco, Marilena (Chapter; Peer reviewed, 2014)
      Numerical simulations and experiments of an elastic circular collar of a floating fish farm are reported. The floater model without netting structure is moored with nearly horizontal moorings and tested in regular deep-water ...

    • Wave-induced bottom shear stress estimation in shallow water exemplified by using deep water wind statistics 

      Myrhaug, Dag (Journal article; Peer reviewed, 2017)
      The paper provides a simple and analytical method which can be used to give estimates of the wave-induced bottom shear stress for very rough beds and mud beds in shallow water based on wind statistics in deep water. This ...

    • Wave-induced current for long-crested and short-crested random waves 

      Myrhaug, Dag; Holmedal, Lars Erik (Journal article; Peer reviewed, 2014)
      This paper provides a simple analytical tool which can be used to calculate the wave-induced current beneath long-crested (2D) and short-crested (3D) random waves. The approach is based on assuming the waves to be a ...

    • Wavefield reconstruction for velocity–stress elastodynamic full-waveform inversion 

      Aaker, Ole Edvard; Raknes, Espen Birger; Pedersen, Ørjan; Arntsen, Børge (Peer reviewed; Journal article, 2020)
      Gradient computations in full-waveform inversion (FWI) require calculating zero-lag cross-correlations of two wavefields propagating in opposite temporal directions. Lossless media permit accurate and efficient reconstruction ...