Now showing items 2292-2311 of 3518

    • Online Drilling Fluid Flowmetering in Open Channels with Ultrasonic Level Sensors using Critical Depths 

      Chhantyal, Khim; Viumdal, Håkon; Mylvaganam, Saba (Journal article; Peer reviewed, 2017)
      In drilling operations, non-Newtonian drilling fluid is continuously circulated in a closed loop. One of the ways to monitor and regulate drilling operations is by accurately measuring the flow rate of circulating drilling ...
    • Online estimation of wax deposition thickness in single-phase sub-sea pipelines based on acoustic chemometrics: A feasibility study 

      Halstensen, Maths; Arvoh, Benjamin Kaku; Amundsen, Lene; Hoffmann, Rainer (Journal article; Peer reviewed, 2012-10-25)
      Wax deposition in sub-sea oil producing pipelines is a concern to the oil producing companies. The deposition of wax in pipelines can cause serious economic implications if not monitored and controlled. Several researchers ...
    • Open Access - opprettelse av åpent institusjonelt arkiv i HiBu : rapport fra arbeidsgruppe 

      Unknown author (Research report, 2008-05-09)
      Arbeidsgruppen anbefaler at det opprettes et institusjonelt arkiv i HiBu fra 1.1.2008. Dette arkivet skal inneholde vitenskapelige arbeider fra ansatte og studentarbeider på bachelor- og masternivå. HiBus institusjonelle ...
    • Open Active Contour Model For Front Tracking Of Detonation Waves 

      Maharjan, Samee; Lysaker, Ola Marius; Gaathaug, André Vagner (Journal article; Peer reviewed, 2017)
      This paper presents an image processing framework for tracking the front of the detonation wave from a sequence of images. The images are captured by high speed camera during a laboratory gas explosion experiment. By ...
    • Open heavy-flavour production and elliptic flow in p-Pb collisions at the LHC with ALICE 

      Zanoli, Henrique J. C.; Acharya, Shreyasi; Acosta, Fernando T.; Adamová, Dagmar; Adolfsson, Jonatan; Aggarwal, Madan M.; Aglieri Rinella, Gianluca; Agnello, Michelangelo; Agrawal, Neelima; Ahammed, Zubayer; Alme, Johan; Altenkaemper, Lucas; Djuvsland, Øystein; Ersdal, Magnus Rentsch; Fionda, Fiorella Maria Celeste; Nystrand, Joakim; Rehman, Attiq Ur; Røhrich, Dieter; Tambave, Ganesh Jagannath; Ullaland, Kjetil; Wagner, Boris; Zhou, Zhuo; Arsene, Ionut Cristian; Bätzing, Paul Christoph; Dordic, Olja; Lardeux, Antoine Xavier; Lindal, Svein; Mahmood, Sohail Musa; Malik, Qasim Waheed; Richter, Matthias; Røed, Ketil; Skaali, Toralf Bernhard; Tveter, Trine Spedstad; Wikne, Jon Christopher; Zhao, Chengxin; Hetland, Kristin Fanebust; Kileng, Bjarte; Nesbø, Simon Voigt; Storetvedt, Maksim Melnik; Helstrup, Håvard; Langøy, Rune; Lien, Jørgen; Ahn, Sang Un; Aiola, Salvatore; Akindinov, Alexander; Al-Turany, Mohammad; Alam, Sk Noor; Albuquerque, D. S. D.; Aleksandrov, Dmitry; Alessandro, Bruno; ALICE, Collaboration (Journal article; Peer reviewed, 2019)
      Measurements of open heavy flavour production in p–A collisions allow the investigation of Cold Nuclear Matter effects. In addition, they are an important tool for a complementary investigation of the long-range correlations ...
    • Open Strategy in a Smart City 

      Einola, Suvi; Kohtamäki, Marko; Hietikko, Harri (Peer reviewed; Journal article, 2019)
      To attract new companies and a talented workforce in a way that increases income streams, cities are searching for strategic capabilities by using a variety of strategic practices. The present study participates in the ...
    • Open Tenders in Public Procurement of Welfare Services: Professionalization, Standardization, and Innovation among Civil Sector Providers 

      Bergsgard, Nils Asle; Nødland, Svein Ingve (Peer reviewed; Journal article, 2020)
      In the article we discuss the increased use of open tenders in the public procurement of welfare services in Norway in order to determine if this implies standardization, professionalization, and/or innovation among civil ...
    • Open user interface architecture for digital multivendor ship bridge systems 

      Nordby, Kjetil; Mallam, Steven; Lützhöft, Margareta Holtensdotter (Peer reviewed; Journal article, 2019)
      Equipment found on ship bridges rarely offer consistent user interface design across the numerous systems that seafarers interact with. It is well documented in human-computer interaction research that consistency is an ...
    • OpenHPL for Modelling the Trollheim Hydropower Plant 

      Vytvytskyi, Liubomyr; Lie, Bernt (Peer reviewed; Journal article, 2019)
      An increase of tightly integrated, renewable energy sources with highly varying production leads to a greater need for flexible hydropower plants to “balance” the intermittent production from these sources. From a systems ...
    • Openness in Scandinavian Classrooms: Student Perceptions of Teaching Practices and High Achievers of Civic Knowledge 

      Huang, Lihong; Biseth, Heidi (Journal article; Peer reviewed, 2016)
      In this paper, we explore how teaching practices in classrooms influence students’ civic knowledge achievement in three Scandinavian countries: Denmark, Norway, and Sweden. Using data from the 2009 International Civic and ...
    • Oppfolging - Tenk hvis: om fiksjonserfaringer som utgangspunkt for refleksjon i lærerutdanningen 

      Lindstøl, Fride (Journal article; Peer reviewed, 2016)
      I denne artikkelen settes søkelyset på norsk lærerutdanning og på et arbeid med å utvikle et profesjonsverksted hvor sammenheng mellom teoretiske og praktiske perspektiver i utdanningen kan utforskes og drøftes. ...
    • Oppfolging - Young peoples’ own stories about dropping out in Norway: An indirect qualitative approach. 

      Bunting, Mette; Moshuus, Geir H. (Peer reviewed; Journal article, 2017)
      Mye forskning om skoleavbrudd i videregående opplæring ser på risikofaktorer, som sosio-økonomisk bakgrunn, grunnskolepoeng og kjønn, og kan derfor sies å fokusere på individuelle og strukturelle faktorer. Artikkelen ...
    • Oppslutning om høstingsaktiviteter 

      Aas, Øystein; Odden, Alf (Conference object, 2002)
      Artikkelen analyserer data fra de nasjonale friluftslivsundersøkelsene i perioden 1970 – 2001 i lys av hypoteser eller påstander om at de såkalte høstingsaktivitetene kan betraktes som en samlet gruppe aktiviteter som ...
    • Optical performance of piezoelectrically actuated MEMS tunable lenses with various pupil geometries 

      Abdelmeguid, Mahmoud Ahmed Farghaly; Akram, Muhammad Nadeem; Halvorsen, Einar (Journal article; Peer reviewed, 2017)
      Abstract. A square geometry for the diaphragm of microelectromechanical systems (MEMS) tunable lenses with circular pupils is often used. This square diaphragm introduces aberrations that would not be present for a circular ...
    • Optically induced refractive errors reduces fixation stability but saccade latency remains stable 

      Vikesdal, Gro Horgen; Langaas, Trine (Journal article; Peer reviewed, 2016)
      The purpose of this study was to investigate the effect of optically induced refractive errors on saccade latency and fixation stability. Sixteen healthy, young adults (two males), with normal visual acuity and normal ...
    • Optimal control strategies with nonlinear optimization for an Electric Submersible Pump lifted oil field 

      Sharma, Roshan; Glemmestad, Bjørn (Journal article; Peer reviewed, 2013)
      In an Electric Submersible Pump (ESP) lifted oil field, the ESP of each oil well should be operated inside its operating window. The total power consumed by the ESPs in the oil field should be minimized. The speed of the ...
    • Optimal design and operation of a UASB reactor for dairy cattle manure 

      Haugen, Finn; Bakke, Rune; Lie, Bernt; Hovland, Jon; Vasdal, Knut (Journal article; Peer reviewed, 2015-02-01)
      Optimal design and operation of a planned full-scale UASB reactor at a dairy farm are determined using optimization algorithms based on steady state simulations of a dynamic AD process model combined with models of the ...
    • Optimal foraging by a large ungulate in an extreme environment: Wild mountain reindeer select snow-free feeding habitats in winter 

      Romtveit, Lena; Strand, Olav; Mossing, Anders; Kastdalen, Leif; Hjeltnes, Arne William; Bjerketvedt, Dag Kjartan; Odland, Arvid; Heggenes, Jan (Journal article; Peer reviewed, 2021)
      Optimal foraging models predict that individual animals will optimize net energy gain by intensifying forage activity and/or reducing forage energy cost. Then, the free distribution model predicts an animal's distribution ...
    • Optimal Frequency Support of Variable-Speed Hydropower Plants at Telemark and Vestfold, Norway: Future Scenarios of Nordic Power System 

      Acosta Montalvo, Martha Nohemi; Pettersen, Daniel; Gonzalez-Longatt, Francisco; Peredo Argos, Jaime; Andrade, Manuel A. (Peer reviewed; Journal article, 2020)
      The integration of renewable resources is quickly growing in the Nordic power system (NPS), and it has led to increasing challenges for the operation and control of the NPS. Nordic countries require that the first-generation ...
    • Optimal Operation of Stand-Alone Microgrid Considering Emission Issues and Demand Response Program Using Whale Optimization Algorithm 

      Tahmasebi, Mehrdad; Pasupuleti, Jagadeesh; Mohamadian, Fatemeh; Shakeri, Mohammad Taghi; Guerrero, Josep M.; Basir Khan, M. Reyasudin; Nazir, Mohammad; Safari, Amir; Bazmohammadi, Najmeh (Peer reviewed; Journal article, 2021)
      Microgrids are new technologies for integrating renewable energies into power systems. Optimal operation of renewable energy sources in standalone micro-grids is an intensive task due to the continuous variation of their ...