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  • A Nonlinear Differential Equation Solver With Potential Application to Pelton Turbines 

    Tveit, Jesper (The University of Bergen, 2016-05-02)
    The focus in this thesis is the development and implementation of a new method for solving nonlinear differential equations on a grid. The method’s novelty lies in the way it represents continuously distributed variables ...
    Doctoral thesis
  • Enhanced Oil Recovery by CO2 Injection in Fractured Reservoirs. Emphasis on Wettability and Water Saturation 

    Steinsbø, Marianne (The University of Bergen, 2016-03-04)
    The work presented in this Thesis is part of ongoing research on Enhanced Oil Recovery (EOR) in fractured reservoirs within the reservoir physics research group at the Department of Physics and Technology, University of ...
    Doctoral thesis
  • Investigations into the impact of solid surfaces in aqueous systems 

    Jensen, Bjørnar (The University of Bergen, 2016-03-03)
    Global warming is upon us. The scientific community is searching for methods of slowing down, preventing and reversing its effects. Carbon dioxide have been at the center of attention the last few decades, being the main ...
    Doctoral thesis
  • The science case for the EISCAT_3D radar 

    McCrea, Ian W.; Aikio, Anita; Alfonsi, Lucilla; Belova, Evgenia; Buchert, Stephan C.; Clilverd, Mark; Engler, Norbert; Gustavsson, Björn Johan; Heinselman, C.; Kero, Johan; Kosch, Mike; Lamy, Herve; Leyser, Thomas; Ogawa, Yasunobu; Oksavik, Kjellmar; Pellinen-Wannberg, Asta; Pitout, Frederic; Rapp, Markus; Stanislawska, Iwona; Vierinen, Juha (Springer, 2015-07-29)
    The EISCAT (European Incoherent SCATer) Scientific Association has provided versatile incoherent scatter (IS) radar facilities on the mainland of northern Scandinavia (the EISCAT UHF and VHF radar systems) and on Svalbard ...
    Journal article
  • Ground-based and Satellite Remote Sensing of Atmospheric Aerosols and Ultraviolet Solar Radiation 

    Muyimbwa, Dennis (The University of Bergen, 2016-04-08)
    Satellite remote sensed data have been used to determine the aerosol climatology and to investigate the influence of the aerosol index (AI) on the ultraviolet (UV) index in coastal land areas in Serrekunda (13.28◦ N, 16.34◦ ...
    Doctoral thesis
  • Measurement of charged-particle spectra in Pb+Pb collisions at (Formula presented.) = 2.76 TeV with the ATLAS detector at the LHC 

    Aad, Georges; Abbott, Brad; Abdallah, Jalal; Abdel Khalek, Samah; Abdinov, Ovsat Bahram oglu; Aben, Rosemarie; Abi, Babak; Abolins, Maris; AbouZeid, Hass; Abramowicz, Halina; Buanes, Trygve; Dale, Ørjan; Eigen, Gerald; Kastanas, Alex; Liebig, Wolfgang; Lipniacka, Anna; Martin dit Latour, Bertrand; Rosendahl, Peter Lundgaard; Sandaker, Heidi; Sjursen, Therese B.; Smestad, Lillian; Stugu, Bjarne; Ugland, Maren; Bugge, Lars; Bugge, Magnar Kopangen; Cameron, David Gordon; Catmore, James Richard; Czyczula, Zofia; Franconi, Laura; Gjelsten, Børge Kile; Gramstad, Eirik; Morisbak, Vanja; Ould-Saada, Farid; Pajchel, Katarina; Pedersen, Maiken; Read, Alexander Lincoln; Røhne, Ole Myren; Stapnes, Steinar; Strandlie, Are; Abreu, Henso; Abreu, Rômulo F.; Abulaiti, Yiming; Acharya, Bobby S.; Adamczyk, Leszek; Adams, David; Adelman, Jareed; Adomeit, Stefanie; Adye, Tim; Agatonovic-Jovin, Tatjana; Aguilar Saavedra, Juan Antonio; ATLAS, Collaboration (Springer, 2015-09-09)
    Charged-particle spectra obtained in Pb+Pb interactions at sNN−−−√=2.76 TeV and pp interactions at sNN−−−√=2.76 TeV with the ATLAS detector at the LHC are presented, using data with integrated luminosities of 0.15 nb−1 and ...
    Journal article
  • Measurement of the forward-backward asymmetry of electron and muon pair-production in pp collisions at (Formula Presented.) = 7 TeV with the ATLAS detector 

    Aad, Georges; Abbott, Brad; Abdallah, Jalal; Abdel Khalek, Samah; Abdinov, Ovsat Bahram oglu; Aben, Rosemarie; Abi, Babak; Abolins, Maris; AbouZeid, Hass; Abramowicz, Halina; Buanes, Trygve; Dale, Ørjan; Eigen, Gerald; Kastanas, Alex; Liebig, Wolfgang; Lipniacka, Anna; Martin dit Latour, Bertrand; Rosendahl, Peter Lundgaard; Sandaker, Heidi; Sjursen, Therese B.; Smestad, Lillian; Stugu, Bjarne; Ugland, Maren; Bugge, Lars; Bugge, Magnar Kopangen; Cameron, David Gordon; Catmore, James Richard; Czyczula, Zofia; Gjelsten, Børge Kile; Gramstad, Eirik; Ould-Saada, Farid; Pajchel, Katarina; Pedersen, Maiken; Read, Alexander Lincoln; Røhne, Ole Myren; Stapnes, Steinar; Strandlie, Are; Abreu, Henso; Abreu, Rômulo F.; Abulaiti, Yiming; Acharya, Bobby S.; Adamczyk, Leszek; Adams, David; Adelman, Jareed; Adomeit, Stefanie; Adye, Tim; Agatonovic-Jovin, Tatjana; Aguilar Saavedra, Juan Antonio; Agustoni, Marco; Ahlen, Steven; ATLAS, Collaboration (Springer, 2015-09-09)
    This paper presents measurements from the ATLAS experiment of the forward-backward asymmetry in the reaction pp → Z/γ * → l + l −, with l being electrons or muons, and the extraction of the effective weak mixing angle. The ...
    Journal article
  • In-flight calibration of NOAA POES proton detectors - Derivation of the MEPED correction factors 

    Sandanger, Marit Irene J.; Ødegaard, Linn-Kristine Glesnes; Tyssøy, Hilde Nesse; Stadsnes, Johan; Søraas, Finn; Oksavik, Kjellmar; Aarsnes, Kjell (Wiley, 2015-11-25)
    The MEPED instruments on board the NOAA POES and MetOp satellites have been continuously measuring energetic particles in the magnetosphere since 1978. However, degradation of the proton detectors over time leads to an ...
    Journal article
  • Estimation of cold plasma outflow during geomagnetic storms 

    Haaland, Stein; Eriksson, A.; Maes, L.; Baddeley, Lisa; Barakat, A.; Chappell, R.; Eccles, V.; Johnsen, C.; Lybekk, Bjørn; Li, K.; Pedersen, A; Schunk, R.; Welling, D. (Wiley, 2015-12-01)
    Low-energy ions of ionospheric origin constitute a significant contributor to the magnetospheric plasma population. Measuring cold ions is difficult though. Observations have to be done at sufficiently high altitudes and ...
    Journal article
  • Scintillation and loss of signal lock from poleward moving auroral forms in the cusp ionosphere 

    Oksavik, Kjellmar; van der Meeren, Christer; Lorentzen, Dag Arne; Baddeley, Lisa; Moen, Jøran Idar (Wiley, 2015-10-27)
    We present two examples from the cusp ionosphere over Svalbard, where poleward moving auroral forms (PMAFs) are causing significant phase scintillation in signals from navigation satellites. The data were obtained using a ...
    Journal article
  • How the IMF By induces a By component in the closed magnetosphere and how it leads to asymmetric currents and convection patternsin the two hemispheres 

    Tenfjord, Paul; Østgaard, Nikolai; Snekvik, Kristian; Laundal, Karl Magnus; Reistad, Jone Peter; Haaland, Stein; Milan, Steve (Wiley, 2015-11-12)
    We used the Lyon-Fedder-Mobarry global magnetohydrodynamics model to study the effects of the interplanetary magnetic field (IMF) By component on the coupling between the solar wind and magnetosphere-ionosphere system. ...
    Journal article
  • Flow visualization of CO2 in tight shale formations at reservoir conditions 

    Fernø, Martin; Hauge, Lars Petter; Rognmo, Arthur Uno; Gauteplass, Jarand; Graue, Arne (Agu publications, 2015-09-18)
    The flow of CO2 in porous media is fundamental to many engineering applications and geophysical processes. Yet detailed CO2 flow visualization remains challenging. We address this problem via positron emission tomography ...
    Journal article
  • Enhanced detection of terrestrial gamma-ray flashes by AGILE 

    Marisaldi, Martino; Argan, A; Ursi, Alessandro; Gjesteland, Thomas; Fuschino, F; Labanti, C; Galli, M; Tavani, M; Pittori, C; Verrecchia, F; D´Amico, F.; Østgaard, Nikolai; Mereghetti, S; Campana, R; Cattaneo, PW; Bulgarelli, S; Colafrancesco, S; Dietrich, S; Longo, F; Gianotti, F.; Giommi, P; Rappoldi, A; Trifoglio, M; Trois, A (AGU Publications, 2015-11-06)
    At the end of March 2015 the onboard software configuration of the Astrorivelatore Gamma a Immagini Leggero (AGILE) satellite was modified in order to disable the veto signal of the anticoincidence shield for the minicalorimeter ...
    Journal article
  • A novel synthesis of tin oxide thin films by the sol-gel process for optoelectronic applications 

    Maharajan, Marikkannan; Venkatachalapathy, Vishnukanthan; Asokan, Vijayshankar; Jeyanthinath, Mayandi; Pearce, Joshua M. (AIP Publishing, 2015-02-13)
    A novel and simple chemical method based on sol-gel processing was proposed to deposit metastable orthorhombic tin oxide (SnOx) thin films on glass substrates at room temperature. The resultant samples are labeled according ...
    Journal article
  • Measurement of electrons from semileptonic heavy-flavor hadron decays in pp collisions at s =2.76TeV 

    Abelev, Betty; Adam, Jaroslav; Adamová, Dagmar; Aggarwal, Madan M.; Agnello, Michelangelo; Agostinelli, Andrea; Agrawal, Nikita; Ahammed, Zubayer; Ahmad, Nazeer; Ahmed, Ijaz; Alme, Johan; Erdal, Hege Austrheim; Helstrup, Håvard; Hetland, Kristin Fanebust; Kileng, Bjarte; Altinpinar, Sedat; Djuvsland, Øystein; Fehlker, Dominik; Haaland, Øystein Senneset; Huang, Meidana; Lønne, Per-Ivar; Nystrand, Joakim; Rehman, Attiq ur; Røhrich, Dieter; Skjerdal, Kyrre; Ullaland, Kjetil; Velure, Arild; Wagner, Boris; Yang, Shiming; Zhou, Zhuo; Arsene, Ionut Christian; Bätzing, Paul Christoph; Dordic, Olja; 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; Ahn, Sang Un; Ahn, Sul-Ah; Aiola, Salvatore; Aimo, Ilaria; Ajaz, Muhammad; ALICE, Collaboration (American Physical Society, 2015-01-07)
    The pT-differential production cross section of electrons from semileptonic decays of heavy-flavor hadrons has been measured at midrapidity in proton-proton collisions at s√=2.76  TeV in the transverse momentum range ...
    Journal article
  • Measurement of Spin Correlation in Top-Antitop Quark Events and Search for Top Squark Pair Production in pp Collisions at s√=8  TeV Using the ATLAS Detector 

    Aad, Georges; Abbott, Brad; Abdallah, Jalal; Abdel Khalek, Samah; Abdinov, Ovsat Bahram oglu; Aben, Rosemarie; Abi, Babak; Abolins, Maris; AbouZeid, Hass; Abramowicz, Halina; Buanes, Trygve; Dale, Ørjan; Eigen, Gerald; Kastanas, Alex; Liebig, Wolfgang; Lipniacka, Anna; Martin dit Latour, Bertrand; Rosendahl, Peter Lundgaard; Sandaker, Heidi; Sjursen, Therese B.; Smestad, Lillian; Stugu, Bjarne; Ugland, Maren; Bugge, Lars; Bugge, Magnar Kopangen; Cameron, David Gordon; Catmore, James Richard; Czyczula, Zofia; Franconi, Laura; Gjelsten, Børge Kile; Gramstad, Eirik; Morisbak, Vanja; Ould-Saada, Farid; Pajchel, Katarina; Pedersen, Maiken; Read, Alexander Lincoln; Røhne, Ole Myren; Stapnes, Steinar; Strandlie, Are; Abreu, Henso; Abreu, Rômulo F.; Abulaiti, Yiming; Acharya, Bobby S.; Adamczyk, Leszek; Adams, David; Adelman, Jareed; Adomeit, Stefanie; Adye, Tim; Agatonovic-Jovin, Tatjana; Aguilar Saavedra, Juan Antonio; ATLAS, Collaboration (American Physical Society, 2015-04-08)
    A measurement of spin correlation in tt ¯ production is presented using data collected with the ATLAS detector at the Large Hadron Collider in proton-proton collisions at a center-of-mass energy of 8 TeV, corresponding ...
    Journal article
  • High-latitude magnetic fields and their time derivatives: interhemispheric similarities 

    Viljanen, Ari; Tanskanen, Eija Irene (Springer, 2013-02-19)
    There are two simple and objective measures of geomagnetic activity: the daily range of field components, and the daily maximum of the time derivative of the field. We study these using data from the geomagnetic latitude ...
    Journal article
  • Measurement of three-jet production cross-sections in pp collisions at 7 TeV centre-of-mass energy using the ATLAS detector 

    Aad, Georges; Abbott, Brad; Abdallah, Jalal; Abdel Khalek, Samah; Abdinov, Ovsat Bahram oglu; Aben, Rosemarie; Abi, Babak; Abolins, Maris; AbouZeid, Hass; Abramowicz, Halina; Buanes, Trygve; Dale, Ørjan; Eigen, Gerald; Kastanas, Alex; Liebig, Wolfgang; Lipniacka, Anna; Martin dit Latour, Bertrand; Rosendahl, Peter Lundgaard; Sandaker, Heidi; Sjursen, Therese B.; Smestad, Lillian; Stugu, Bjarne; Ugland, Maren; Bugge, Lars; Bugge, Magnar Kopangen; Cameron, David Gordon; Catmore, James Richard; Czyczula, Zofia; Franconi, Laura; Gjelsten, Børge Kile; Gramstad, Eirik; Ould-Saada, Farid; Pajchel, Katarina; Pedersen, Maiken; Read, Alexander Lincoln; Røhne, Ole Myren; Stapnes, Steinar; Strandlie, Are; Abreu, Henso; Abreu, Rômulo F.; Abulaiti, Yiming; Acharya, Bobby S.; Adamczyk, Leszek; Adams, David; Adelman, Jareed; Adomeit, Stefanie; Adye, Tim; Agatonovic-Jovin, Tatjana; Aguilar Saavedra, Juan Antonio; Agustoni, Marco; ATLAS, Collaboration (Springer, 2015-05-27)
    Double-differential three-jet production cross-sections are measured in proton–proton collisions at a centre-of-mass energy of s√=7TeV using the ATLAS detector at the large hadron collider. The measurements are presented ...
    Journal article
  • Measurements of top quark pair relative differential cross-sections with ATLAS in pp collisions at root s=7 TeV 

    Buanes, Trygve; Burgess, Thomas; Eigen, Gerald; Kastanas, Alex; Liebig, Wolfgang; Lipniacka, Anna; Rosendahl, Peter Lundgaard; Sandaker, Heidi; Sjursen, Therese B.; Stugu, Bjarne Sandvik; Tonoyan, Arshak; Ugland, Maren; Bugge, Lars; Buran, Torleiv; Cameron, David Gordon; Czyczula, Zofia; Gjelsten, Børge Kile; Lund, Esben; Ould-Saada, Farid; Pajchel, Katarina; Pylypchenko, Yuriy; Read, Alexander Lincoln; Røhne, Ole Myren; Samset, Bjørn Hallvard; Stapnes, Steinar; Strandlie, Are; Aad, Georges; Abajyan, Tatevik; Abbott, Brad; Abdallah, Jalal; Abdel Khalek, Samah; Abdelalim, Ahmed Ali; Abdesselam, Abdel; Abdinov, Ovsat Bahram oglu; Abi, Babak; Abolins, Maris; AbouZeid, Hass; Abramowicz, Halina; Abreu, Henso; Acerbi, Emilio; Adams, David; Addy, Tetteh N.; Adelman, Jareed; Adomeit, Stefanie; Adragna, Paolo; Adye, Tim; Aefsky, Scott Alan; Aharrouche, Mohamed; Ahlen, Steven; Ahles, Florian; ATLAS, Collaboration (Springer, 2013-01-15)
    Measurements are presented of differential cross-sections for top quark pair production in pp collisions at s√=7 TeV relative to the total inclusive top quark pair production cross-section. A data sample of 2.05 fb−1 ...
    Journal article
  • Measurement of isolated-photon pair production in pp collisions at root s=7 TeV with the ATLAS detector 

    Buanes, Trygve; Burgess, Thomas; Eigen, Gerald; Kastanas, Alex; Liebig, Wolfgang; Lipniacka, Anna; Rosendahl, Peter Lundgaard; Sandaker, Heidi; Sjursen, Therese B.; Stugu, Bjarne Sandvik; Tonoyan, Arshak; Ugland, Maren; Bugge, Lars; Buran, Torleiv; Cameron, David Gordon; Czyczula, Zofia; Gjelsten, Børge Kile; Gramstad, Eirik; Lund, Esben; Ould-Saada, Farid; Pajchel, Katarina; Pylypchenko, Yuriy; Read, Alexander Lincoln; Røhne, Ole Myren; Samset, Bjørn Hallvard; Smestad, Lillian; Stapnes, Steinar; Strandlie, Are; Aad, Georges; Abajyan, Tatevik; Abbott, Brad; Abdallah, Jalal; Abdel Khalek, Samah; Abdelalim, Ahmed Ali; Abdesselam, Abdel; Abdinov, Ovsat Bahram oglu; Abi, Babak; Abolins, Maris; AbouZeid, Hass; Abramowicz, Halina; Abreu, Henso; Acerbi, Emilio; Adams, David; Addy, Tetteh N.; Adelman, Jareed; Adomeit, Stefanie; Adragna, Paolo; Adye, Tim; Aefsky, Scott Alan; Aharrouche, Mohamed; ATLAS, Collaboration (Springer, 2013-01-11)
    The ATLAS experiment at the LHC has measured the production cross section of events with two isolated photons in the final state, in proton-proton collisions at s√=7TeV. The full data set collected in 2011, corresponding ...
    Journal article

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