Browsing Department of Physics and Technology by Title

Now showing items 2132-2151 of 2183

    • Validating the Space Weather Modeling Framework (SWMF) for applications in northern Europe: Ground magnetic perturbation validation 

      Kwagala, Norah Kaggwa; Hesse, Michael; Moretto, Therese; Tenfjord, Paul; Norgren, Astrid Elisabet Cecilia; Tóth, Gábor; Gombosi, Tamás I.; Kolstø, Håkon Midthun; Spinnangr, Susanne Flø (Journal article; Peer reviewed, 2020)
      In this study we investigate the performance of the University of Michigan’s Space Weather Modeling Framework (SWMF) in prediction of ground magnetic perturbations (ΔB) and their rate of change with time (dB/dt), which is ...

    • Vannbasert eor i oppsprukne bergarter - økt oljeutvinning ved kjemikalietilsetning i injeksjonsvannet 

      Nyheim, Arita (Master thesis, 2010-06-01)
      En stor del av verdens hydrokarbonreserver finnes i karbonater. Karbonatreservoarer er komplekse fordi reservoarbergarten ofte er sprø og sprekker lett. Mineralsammensetningen av karbonater gjør poreoverflaten mer tilbøyelig ...

    • Vanninjektivitet og svekking av kalk under injeksjon av kaldt vann 

      Selvåg, Julia (Master thesis, 2014-12-05)
      Primær oljeutvinning ved trykkavlastning gir ofte lav utvinningsgrad, og etterlater stor restoljemetning i reservoaret. For å forbedre oljeutvinningsgraden kan andre produksjonsmetoder benyttes; vanninjeksjon har i lang ...

    • Vannutfelling på rustoverflater i gassrør 

      Haynes, Martin (Master thesis, 2009-06-12)
      Målet for denne oppgaven har vært å legge et grunnlag for beregninger av vannegenskaper i adsorbert fase på rust. Egenskaper bestemmes av et antall kompliserte termodynamiske og kinetiske mekanismer, som gjør at problemstillingen ...

    • Variation in relative biological effectiveness for cognitive structures in proton therapy of pediatric brain tumors 

      Otterlei, Ole Marius; Indelicato, Daniel J.; Toussaint, Laura; Ytre-Hauge, Kristian; Pilskog, Sara; Fjæra, Lars Fredrik; Rørvik, Eivind; Pettersen, Helge Egil Seime; Muren, Ludvig Paul; Lassen-Ramshad, Yasmin; Di Pinto, Marcos; Stokkevåg, Camilla Hanquist (Journal article; Peer reviewed, 2021)
      Background Clinically, a constant value of 1.1 is used for the relative biological effectiveness (RBE) of protons, whereas in vitro the RBE has been shown to vary depending on physical dose, tissue type, and linear energy ...

    • Variation of bending rigidity with material density: bilayer silica with nanoscale holes 

      Tømterud, Martin; Eder, Sabrina Daniela; Büchner, Christin; Heyde, Markus; Freund, Hans Joachim; Manson, Joseph R.; Holst, Bodil (Journal article; Peer reviewed, 2022)
      Two dimensional (2D) materials are a young class of materials that is foreseen to play an important role as building blocks in a range of applications, e.g. flexible electronics. For such applications, mechanical properties ...

    • Vector meson photoproduction in UPCs with FoCal 

      Bylinkin, Aleksandr; Nystrand, Joakim Ingemar; Tapia Takaki, Takaki (Journal article; Peer reviewed, 2023)
      We discuss the physics prospects of photon-induced measurements using the high-granularity FoCal detector to be installed at the ALICE experiment, covering the pseudorapidity interval 3.4 ≤ η ≤ 5.8. This new detector, ...

    • Veksling mellom ulike fokus i et utvalg av læreres veiledning av elever under praktisk natufagsarbeid 

      Sinnes, Svein Tore (Master thesis, 2015-06-08)
      Dialogue and discourse in science classrooms have been well studied, and multiple articles have been written about both challenges and opportunities related to classroom dialogue between teacher and students. In my master's ...

    • Velocity distributions in microskimmer supersonic expansion helium beams: High precision measurements and modeling 

      Eder, Sabrina Daniela; Palau, Adria Salvador; Kaltenbacher, Thomas; Bracco, Gianangelo; Holst, Bodil (Peer reviewed; Journal article, 2018)
      Supersonic molecular beams are used in many applications ranging from spectroscopy and matter wave optics to surface science. The experimental setup typically includes a conically shaped, collimating aperture, the skimmer. ...

    • Vented gas and dust explosions - External explosions 

      Klausen, Mads-Jørgen (Master thesis, 2016-06-01)
      The use of explosion venting is a widely applied safety measure, mitigating the effects of an internal gas and dust explosion. Implementation of this safety measure does however not eliminate all risks and hazards associated ...

    • Vented hydrogen deflagrations in weak enclosures: Experimental results and implications for industrial practice 

      Skjold, Trygve (Peer reviewed; Journal article, 2019)
      It is common practice in industry to install equipment for hydrogen energy applications in containers and smaller enclosures. Fires and explosions represent a significant hazard for such installations (Skjold et al., 2018), ...

    • Versatile compressive microscope for hyperspectral transmission and fluorescence lifetime imaging 

      Klein, Lukáš; Kristoffersen, Arne Skodvin; Touš, Jan; Žídek, Karel (Journal article; Peer reviewed, 2022)
      Increasing demand for multimodal characterization and imaging of new materials entails the combination of various methods in a single microscopic setup. Hyperspectral imaging of transmission spectra or photoluminescence ...

    • Videreutvikling av instrumentering - for studier av mikroalgers vertikalmigrasjon under ulike lysforhold 

      Silgjerd, Ørjan (Master thesis, 2017)
      Mikroalger er viktige som primærprodusent i økosystem, både som næring til andre organismer men også som oksygenprodusent. Endringer av miljøforhold som lysintensitet, bølgelengde og tilgang på næringsstoffer, vil påvirke ...

    • Viking and early middle ages Northern Scandinavian textiles proven to be made with hemp 

      Skoglund, Git; Nockert, Margareta; Holst, Bodil (Peer reviewed; Journal article, 2013-10-18)
      Nowadays most plant textiles used for clothing and household are made of cotton and viscose. Before the 19th century however, plant textiles were mainly made from locally available raw materials, in Scandinavia these were: ...

    • Viscous potential flow analysis of peripheral heavy ion collisions 

      Wang, Du-Juan; Néda, Zoltán; Csernai, Laszlo (Peer reviewed; Journal article, 2013-02-19)
      The conditions for the development of a Kelvin-Helmholtz instability (KHI) for the quark-gluon plasma (QGP) flow in a peripheral heavy ion collision is investigated. The projectile and target side particles are separated ...

    • Visualization and interpretation of methane hydrate growth and dissociation in synthetic porous media 

      Flatlandsmo, Josef (Master thesis, 2015-12-22)
      Sedimentary natural gas hydrates might play an important role in the future energy mix and the impact of methane release from natural gas hydrates can be significant also with respect to climate change. Vast amounts of ...

    • Visualization of Unsteady Flow in a Multistage Helico-Axial Pump 

      Gundersen, Ted Ørjan Seim; Moënne-Loccoz, Victor; Dupoiron, Marine; Torbergsen, Erik Andre; Balakin, Boris; Arntzen, Bjørn Johan; Hoffmann, Alex Christian (Journal article, 2023)
      Helico-axial pumps are designed to pump mixtures of gas and liquid. Secondary flows and rotor-stator interactions are known to add complexity to the flow field in unshrouded axial-flow turbomachinery. Here we use a high-speed ...

    • Vorticity in peripheral collisions at the Facility for Antiproton and Ion Research and at the JINR Nuclotron-based Ion Collider fAcility 

      Csernai, Laszlo; Wang, Du-Juan; Bleicher, Marcus; Stöcker, Horst (Peer reviewed; Journal article, 2014-08-29)
      The flow vorticity development is studied in the reaction plane of peripheral relativistic heavy-ion reactions at energies just above the threshold of the transition to a quark-gluon plasma (QGP). Earlier calculations at ...

    • W and Z boson production in p–Pb collisions at \(\sqrt{s_{\rm NN}}=5.02\) TeV 

      Adam, Jaroslav; Adamová, Dagmar; Aggarwal, Madan M.; Aglieri Rinella, G; Agnello, Michelangelo; Agrawal, Nikita; Ahammed, Zubayer; Ahmad, N; Ahn, SU; Alme, Johan; Altinpinar, Sedat; Arsene, Ionut Christian; Bätzing, Paul Christoph; Dordic, Olja; Helstrup, Håvard; Hetland, Kristin Fanebust; Kileng, Bjarte; Lønne, Per-Ivar; Mahmood, Sohail Musa; Milosevic, Jovan; Nystrand, Joakim; Qvigstad, Henrik; Rehman, Attiq Ur; Richter, Matthias Rudolph; Røed, Ketil; Røhrich, Dieter; Tveter, Trine Spedstad; Ullaland, Kjetil; Velure, Arild; Wagner, Boris; Wikne, Jon Christopher; Zhang, Hui; Zhao, Chengxin; Zhou, Zhuo; Zhu, Hongsheng; Langøy, Rune; Lien, Jørgen André; Aiola, Salvatore; Akindinov, Alexander; Alam, Sk Noor; De Albuquerque, Danilo Silva; Aleksandrov, Dimitry; Allesandro, B.; Alexandre, D; Alfaro Molina, R; Alici, A; Alkin, A; ALICE, Collaboration (Peer reviewed; Journal article, 2017-02)
      The W and Z boson production was measured via the muonic decay channel in proton-lead collisions at \(\sqrt{s_{\rm NN}}=5.02\) TeV at the Large Hadron Collider with the ALICE detector. The measurement covers backward ...

    • A water droplet-powered sensor based on charge transfer to a flow-through front surface electrode 

      Helseth, Lars Egil (Journal article; Peer reviewed, 2020)
      A water droplet sensor based on a flow-through front surface electrode is demonstrated. It is shown that a triboelectric nanogenerator based on a metal-dielectric junction can be utilized to construct simple, self-powered ...