Browsing Fakultet for ingeniørvitenskap (IV) by Title

Now showing items 22812-22831 of 23271

    • Viscoelastic characterization and comparison of Norwegian asphalt mixtures using dynamic modulus and IDT tests 

      Alamnie, Mequanent; Taddesse, Ephrem; Hoff, Inge (Chapter, 2021)

    • Viscoelastic response of hydrogel materials at finite strains 

      Skovly, Martin Johannessen (Master thesis, 2015)
      Hydrogel materials are very soft materials consisting of polymer networks and solvent molecules. The materials may exhibit large volume changes depending on its external chemical and mechanical environment and have ...

    • Viscosity in modified gravity 

      Brevik, Iver Håkon (Journal article; Peer reviewed, 2012)
      A bulk viscosity is introduced in the formalism of modified gravity. It is shown that, based on a natural scaling law for the viscosity, a simple solution can be found for quantities such as the Hubble parameter and the ...

    • Viscosity-Induced Crossing of the Phantom Barrier 

      Brevik, Iver Håkon (Journal article; Peer reviewed, 2015)
      We show explicitly, by using astrophysical data plus reasonable assumptions for the bulk viscosity in the cosmic fluid, how the magnitude of this viscosity may be high enough to drive the fluid from its position in the ...

    • Viscosity-induced crossing of the phantom divide in the dark cosmic fluid 

      Brevik, Iver Håkon (Journal article; Peer reviewed, 2013-12-10)
      Choosing various natural forms for the equation-of-state parameter w and the bulk viscosity ζ, we discuss how it is possible for a dark energy fluid to slide from the quintessence region across the divide w = −1 into the ...

    • Viscous Cosmology for Early- and Late-Time Universe 

      Brevik, Iver Håkon; Grøn, Øyvind; de Haro, Jaume; Odintsov, Sergei D.; Saridakis, Emmanuel N. (Journal article; Peer reviewed, 2017)
      From a hydrodynamicist’s point of view the inclusion of viscosity concepts in the macroscopic theory of the cosmic fluid would appear most natural, as an ideal fluid is after all an abstraction (exluding special cases such ...

    • Viscous coupled fluids in terms of a log-corrected equation-of-state 

      Brevik, Iver Håkon; Myrzakulov, K.; Timoshkin, A. V.; Zhadyranova, A. (Peer reviewed; Journal article, 2021)
      In this paper, we consider a class of cosmological fluids that possess properties analogous to those of crystalline solids undergoing isotropic deformations. Our research is based on a modified log-corrected power-law ...

    • Viscous flow around a circular cylinder near a plane wall 

      Engelbreth, Knut Inge (Master thesis, 2011)
      Marine pipelines placed at or near the seabed are exposed to currents and waves. In the presence of a sedimentary seabed, the interaction between the surrounding water motions and the pipeline may cause erosion of sediments ...

    • Viscous flow around a simplified model of a Christmas tree 

      Hagen, Haakon Gunnerius Johnsrud (Master thesis, 2016)
      In the petroleum industry, a Christmas tree is a structure consisting of valves and spools that sits atop an oil well. In order to better understand the forces acting on a Christmas tree during and after installation, ...

    • Viscous Flow Around Finite Lenght Circular Cylinder 

      Levold, Pål (Master thesis, 2012)
      Viscous flow around circular cylinders is a classical research topic in fluid dynamics with a vast amount of practical applications in the field of offshore marine technology. In the flow around cylinders of finite length, ...

    • Viscous Flow Around Inclined Circular Cylinder 

      Cai, Zhisong (Master thesis, 2017)
      Circular cylinder is of vital importance in the marine industry. The goal of this thesis is to study the physical phenomenon around the inclined circular cylinder as well as the forces acting on it. The study is mainly ...

    • Viscous regularization for cohesive zone modelling under constant displacement: an application to hydrogen embrittlement simulation 

      Yu, Haiyang; Olsen, Jim Stian; Olden, Vigdis; Alvaro, Antonio; He, Jianying; Zhang, Zhiliang (Journal article; Peer reviewed, 2016)
      The convergence problem during the cohesive zone modelling of hydrogen embrittlement in constant displacement scenario is attributed to the numerical instability which is studied analytically in the present work. The ...

    • Visible-Light-Driven Photochromism of Hexagonal Sodium Tungsten Bronze Nanorods 

      Gao, Tao; Jelle, Bjørn Petter (Journal article; Peer reviewed, 2013)
      Single-crystalline sodium tungsten bronze (Na-WO3) nanorods with typical diameters of 10–200 nm and lengths of several micrometers were prepared via hydrothermal synthesis. The as-prepared Na-WO3 nanorods crystallized in ...

    • Vision Based Localization for Subsea Intervention 

      Henriksen, Eirik Hexeberg; Schjølberg, Ingrid; Gjersvik, Tor Berge (Chapter; Peer reviewed, 2017)
      A vision based underwater localization system using fiducial markers is proposed. The system is implemented as a new control mode in a shared control system for ROVs and tested experimentally in a pool. A high accuracy ...

    • Vision Based Robotic Control 

      Solberg, Eirik Anfindsen (Master thesis, 2014)
      The main objective of this project was to create a visual system for object tracking, and implement this on the new robotic lab at the Department of Production and Quality Engineering.There are used two identical KUKA ...

    • «Vision in Product design» as a method for universal design: «Vision in Product design» som metode for universell utforming 

      Wright, Philip Solvang (Master thesis, 2014)
      The intention of this thesis is to identify and address the methodological challenges with Universal Design. Since Universal Design can be understood as both a design approach and a design philosophy, challenges in both ...

    • Vision system for quality assessment of robotic cleaning of fish processing plants using CNN 

      Bjørlykhaug, Emil Dale; Egeland, Olav (Journal article; Peer reviewed, 2019)
      A vision system has been developed for automatic quality assessment of robotic cleaning of fish processing lines. The quality assessment is done by detecting residual fish blood on cleaned surfaces. The system is based on ...

    • Vision-Aided Inertial Navigation for Underwater Vehicles Using ArUco Markers 

      Stavnes, Roar (Master thesis, 2021)
      Skiftet fra tradisjonell olje- og gassproduksjon mot produksjonsenheter på havbunnen har skapt et økt behov for undervannsoperasjoner. Dette har motivert bruken av autonomi for å effektivisere operasjoner og redusere ...

    • Vision-based control of a knuckle boom crane with online cable length estimation 

      Tysse, Geir Ole; Cibicik, Andrej; Egeland, Olav (Peer reviewed; Journal article, 2020)
      A vision-based controller for a knuckle boom crane is presented. The controller is used to control the motion of the crane tip, and at the same time, compensate for payload oscillations. The oscillations of the payload are ...

    • Vision-Based Control of a Robot Interacting with Moving and Flexible Objects 

      Myhre, Torstein Anderssen (Doctoral thesis at NTNU;2016:101, Doctoral thesis, 2016)
      Industrial tasks that involves manipulation of moving or flexible objects are often performed with manual labour, while the use of industrial robots have mostly been limited to manipulation of static objects and objects ...