Blar i Department of Physics and Technology på tittel

Viser treff 715-734 av 2112

    • Influence of Acetone and Sodium Chloride Additives on Cooling Efficiency of Water Droplets Impinging onto Hot Metal Surfaces 

      Bjørge, Joachim Søreng; Bjørkheim, Svein Arne; Log, Maria-Monika Metallinou; Log, Torgrim; Frette, Øyvind (Peer reviewed; Journal article, 2019-06-19)
      In the present work, the cooling efficiency of water droplets falling onto hot aluminum and stainless steel discs from heights of 12.5 cm, 25 cm, 50 cm and 100 cm, corresponding to speeds of 1.5 m/s, 2.2 m/s, 3.1 m/s and ...

    • Influence of beam pruning techniques on LET and RBE in proton arc therapy 

      Henjum, Helge; Tjelta, Johannes; Fjæra, Lars Fredrik; Pilskog, Sara Margareta Cecilia; Stokkevåg, Camilla Hanquist; Lyngholm, Erlend; Handeland, Andreas Havsgård; Ytre-Hauge, Kristian Smeland (Journal article; Peer reviewed, 2023)
      Introduction: Proton arc therapy (PAT) is an emerging treatment modality that holds promise to improve target volume coverage and reduce linear energy transfer (LET) in organs at risk. We aimed to investigate if pruning ...

    • Influence of Capillary Pressure on Estimation of Relative Permeability for Immiscible WAG Processes 

      Dale, Elisabeth Iren; Skauge, Arne (Journal article, 2008-04-30)
      Capillary pressure is one of the important parameters when describing flow in porous media. This parameter is nevertheless in some cases neglected, especially if no reliable measured data is available. The purpose of this ...

    • The influence of energetic particle precipitation on Antarctic stratospheric chlorine and ozone over the 20th century 

      Maliniemi, Ville Aleksi; Arsenovic, Pavle; Seppälä, Annika; Tyssøy, Hilde Nesse (Journal article; Peer reviewed, 2022)
      Chlorofluorocarbon (CFC) emissions in the latter part of the 20th century reduced stratospheric ozone abundance substantially, especially in the Antarctic region. Simultaneously, polar stratospheric ozone is also destroyed ...

    • Influence of Enhanced Planetary Wave Activity on the Polar Vortex Enhancement Related to Energetic Electron Precipitation 

      Asikainen, T.; Salminen, Antti; Maliniemi, Ville Aleksi; Mursula, K. (Journal article; Peer reviewed, 2020)
      The Northern polar vortex experiences considerable interannual variability, which is also reflected to tropospheric weather. Recent research has established a link between polar vortex variations and energetic electron ...

    • The influence of microscale surface roughness on water-droplet contact electrification 

      Helseth, Lars Egil (Peer reviewed; Journal article, 2019)
      When water comes in contact with a hydrophobic fluoropolymer, a triboelectric charge tends to form on the surface. Here, it is investigated how the triboelectric charge formed upon contact with water drops depends on the ...

    • Influence of Off-Sun-Earth Line Distance on the Accuracy of L1 Solar Wind Monitoring 

      Milan, Stephen Eric; Carter, J.A.; Bower, G.E.; Fleetham, A.L.; Anderson, B.J. (Journal article; Peer reviewed, 2022)
      Upstream solar wind measurements from near the L1 Lagrangian point are commonly used to investigate solar wind-magnetosphere coupling. The off-Sun-Earth line distance of such solar wind monitors can be large, up to 100 RE. ...

    • Influence of Residual Oil on Polymer Injectivity 

      Jacobsen, Jørgen Gausdal (Master thesis, 2017-06-22)
      Because a significant fraction of the world’s light oil reservoirs has already been produced, the technical and economic challenges of developing heavy oil fields is now unavoidable [1]. Water flooding has proven to be a ...

    • Influence of Salt Concentration on Charge Transfer When a Water Front Moves across a Junction between a Hydrophobic Dielectric and a Metal Electrode 

      Helseth, Lars Egil (Journal article; Peer reviewed, 2020)
      An energy-harvesting device based on water moving across the junction between a hydrophobic dielectric and a metal electrode is demonstrated. The charge transfer due to contact electrification as the junction is dipped ...

    • Inherent optical properties of dissolved and particulate matter in an Arctic fjord (Storfjorden, Svalbard) in early summer 

      Petit, Tristan; Hamre, Børge; Sandven, Håkon Johan; Röttgers, Rüdiger; Kowalczuk, Piotr; Zablocka, Monika; Granskog, Mats A. (Journal article; Peer reviewed, 2022)
      Lysforholdene i havet spiller en nøkkelrolle for marin primærproduksjon og dermed for det hele marine økosystemet. I polområdene er det spesielt stor sesongvariasjon i lysforholdene, og mange ulike prosesser kan påvirke ...

    • Initiation of lightning flashes simultaneously observed from space and the ground: Narrow bipolar events 

      López, Jesús A.; Montanyà, Joan; van der Velde, Oscar; Romero, David; Gordillo-Vázquez, Francisco J.; Pérez-Invernón, Francisco J.; Luque, Alejandro; Morales Rodriguez, Carlos Augusto; Neubert, Torsten; Rison, William; Krehbiel, Paul; González, Javier Navarro; Østgaard, Nikolai; Reglero, Víctor (Journal article; Peer reviewed, 2022)
      We investigate the initiation of four lightning flashes detected from ground by means of the Colombia Lightning Mapping Array (Colombia-LMA) and simultaneously observed from space by the optical sensors of the Atmosphere-Space ...

    • Insight into particle production mechanisms via angular correlations of identified particles in pp collisions at \(\sqrt{s}=7\) TeV 

      Adam, Jaroslav; Adamová, Dagmar; Aggarwal, Madan M.; Aglieri Rinella, Gianluca; Agnello, Michelangelo; Agrawal, Nikita; Ahammed, Zubayer; Ahmad, Shafiq F.; Ahn, Sang Un; Aiola, Salvatore; Alme, Johan; Helstrup, Håvard; Hetland, Kristin Fanebust; Kileng, Bjarte; Nesbø, Simon Voigt; Altinpinar, Sedat; Djuvsland, Øystein; Lønne, Per-Ivar; Nystrand, Joakim; Rehman, Attiq ur; Røhrich, Dieter; Tambave, Ganesh Jagannath; Ullaland, Kjetil; Velure, Arild; Wagner, Boris; Zhang, Hui; Zhou, Zhuo; Zhu, Hongsheng; Arsene, Ionut Christian; Bätzing, Paul Christoph; Dordic, Olja; Lardeux, Antoine Xavier; Lindal, Svein; Mahmood, Sohail Musa; Milosevic, Jovan; Qvigstad, Henrik; Richter, Matthias; Røed, Ketil; Skaali, Toralf Bernhard; Tveter, Trine Spedstad; Wikne, Jon Christopher; Zhao, Chengxin; Langøy, Rune; Lien, Jørgen André; Akindinov, Alexander; Alam, Sk Noor; De Albuquerque, Danilo Silva; Aleksandrov, Dimitry; Alessandro, Bruno; Alexandre, Didier; ALICE, Collaboration (Peer reviewed; Journal article, 2017-08)
      Two-particle angular correlations were measured in pp collisions at \(\sqrt{s} = 7\) TeV for pions, kaons, protons, and lambdas, for all particle/anti-particle combinations in the pair. Data for mesons exhibit an expected ...

    • Instrumentering av eksperimentell vannkolonne for studier av mikroalgers vertikalforflytning 

      Fotland, Sindre (Master thesis, 2013-05-31)
      Alger er viktig som primærprodusent i det marine økosystem. Det er derfor viktig at det oppnås større forståelse for hvordan alger lever og dør. For å kunne oppnå denne forståelsen må det gjøres tester og eksperimenter på ...

    • Integrating Cognitive Learning Strategies into Physics Instruction : Developing students’ approaches to physics and learning 

      Gjerde, Vegard (Doctoral thesis, 2021-03-24)
      Introductory physics courses are obligatory for many disciplines outside of physics. As experienced by many students, they are notoriously difficult, often with high failure rates. Many students, whether they passed or ...

    • Integrating effective learning strategies in basic physics lectures: A thematic analysis 

      Gjerde, Vegard; Holst, Bodil; Kolstø, Stein Dankert (Journal article; Peer reviewed, 2021)
      Introductory mechanics is an obligatory course for many disciplines outside of physics and the failure rate is often high. Even the students who pass the course often fail to achieve the main learning goal: The conceptual ...

    • Integration and design for the ALICE ITS readout chain 

      Mikkelsen, Gitle (Master thesis, 2018-06-26)
      ALICE and its Inner Tracking System detector in the LHC at CERN will undergo a major upgrade during its second long shutdown taking place in 2019 and 2020. New silicon sensors called ALPIDE will be utilized, which requires ...

    • Intensity asymmetries in the dusk sector of the poleward auroral oval due to IMF Bx 

      Reistad, Jone Peter; Østgaard, Nikolai; Laundal, Karl Magnus; Haaland, Stein; Tenfjord, Paul; Snekvik, Kristian; Oksavik, Kjellmar; Milan, Steve (Peer reviewed; Journal article, 2014-12)
      In the exploration of global-scale features of the Earth's aurora, little attention has been given to the radial component of the Interplanetary Magnetic Field (IMF). This study investigates the global auroral response in ...

    • Inter-patient variations in relative biological efectiveness for craniospinal irradiation with protons 

      Ytre-Hauge, Kristian; Fjæra, Lars Fredrik; Rørvik, Eivind; Dahle, Tordis Johnsen; Dale, Jon Espen; Pilskog, Sara; Stokkevåg, Camilla Hanquist (Journal article; Peer reviewed, 2020)
      Cranio-spinal irradiation (CSI) using protons has dosimetric advantages compared to photons and is expected to reduce risk of adverse effects. The proton relative biological effectiveness (RBE) varies with linear energy ...

    • The interaction between transpolar arcs and cusp spots 

      Fear, Robert C.; Milan, Steve; Carter, Jenny A.; Maggiolo, Romain (Peer reviewed; Journal article, 2015-11-25)
      Transpolar arcs and cusp spots are both auroral phenomena which occur when the interplanetary magnetic field is northward. Transpolar arcs are associated with magnetic reconnection in the magnetotail, which closes magnetic ...

    • Interaction of Cold Streaming Protons with the Reconnection Process 

      Tenfjord, Paul; Hesse, Michael; Norgren, Astrid Elisabet Cecilia; Spinnangr, Susanne Flø; Kolstø, Håkon Midthun; Kwagala, Norah Kaggwa (Journal article; Peer reviewed, 2020)
      We employ a 2.5D particle-in-cell simulation to study a scenario where the reconnection process captures cold streaming protons. As soon as the tailward streaming protons become involved, they contribute to the overall ...