Now showing items 1-20 of 267

    • Acoustic Methods for Obtaining the Pressure Reflection Coefficient from a Buffer Rod Based Measurement Cell 

      Bjørndal, Erlend; Frøysa, Kjell-Eivind (IEEE, 2008-08-08)
      The known acoustic methods for obtaining the pressure reflection coefficient from a buffer rod based measurement cell are presented, along with 2 new generic approaches for measuring the pressure reflection coefficient ...
      Journal articlePeer reviewed
    • The ALICE TPC, a large 3-dimensional tracking device with fast readout for ultra-high multiplicity events 

      Alme, Johan; Andres, Y; Appelshauser, H; Bablok, Sebastian Robert; Bialas, N; Bølgen, Rikard; Bonnes, U; Bramm, R; Braun-Munzinger, P; Campagnolo, R; Christiansen, P; Dobrin, A; Engster, C; Fehlker, Dominik; Foka, Y; Frankenfeld, U; Gaardhoje, JJ; Garabatos, C; Glassel, P; Gutierrez, CG; Gros, P; Gustafsson, HA; Helstrup, Håvard; Hoch, M; Ivanov, M; Janik, R; Junique, A; Kalweit, A; Keidel, R; Kniege, S; Kowalski, M; Larsen, Dag Toppe; Lesenechal, Y; Lenoir, P; Lindegaard, N; Lippmann, C; Mager, M; Mast, M; Matyja, A; Munkejord, Magne; Musa, L; Nielsen, BS; Nikolic, V; Oeschler, H; Olsen, EK; Oskarsson, A; Osterman, L; Pikna, M; Rehman, A; Renault, G; Renfordt, R; Rossegger, S; Røhrich, Dieter; Røed, Ketil; Richter, Matthias; Rueshmann, G; Rybicki, A; Sann, H; Schmidt, HR; Siska, M; Sitar, B; Soegaard, C; Soltveit, HK; Soyk, D; Stachel, J; Stelzer, H; Stenlund, E; Stock, R; Strmen, P; Szarka, I; Ullaland, Kjetil; Vranic, D; Veenhof, R; Westergaard, J; Wiechula, J; Windelband, B (Elsevier, 2010-10-01)
      The design, construction, and commissioning of the ALICE Time-Projection Chamber (TPC) is described. It is the main device for pattern recognition, tracking, and identification of charged particles in the ALICE experiment ...
      Journal article
    • An altitude and distance correction to the initial fluence distribution of TGFs 

      Nisi, Ragnhild Schrøder; Østgaard, Nikolai; Gjesteland, Thomas; Collier, Andrew B. (Wiley, 2014-10)
      The source fluence distribution of terrestrial gamma ray flashes (TGFs) has been extensively discussed in recent years, but few have considered how the TGF fluence distribution at the source, as estimated from satellite ...
      Journal article
    • Analysis of Ozone (O3) and Erythemal UV (EUV) measured by TOMS in the equatorial African belt 

      Ssenyonga, Taddeo; Stamnes, Jakob J.; Dahlback, Arne; Steigen, Andreas L; Okullo, Willy; Frette, Øyvind (Academy of Science of South Africa, 2010-01-19)
      We presented time series of total ozone column amounts (TOCAs) and erythemal UV (EUV) doses derived from measurements by TOMS (Total Ozone Mapping Spectrometer) instruments on board the Nimbus-7 (N7) and the Earth Probe ...
      Journal article
    • ATLAS search for new phenomena in dijet mass and angular distributions using pp collisions at $\sqrt{s}$=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; 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)
      Mass and angular distributions of dijets produced in LHC proton-proton collisions at a centre-of-mass energy $\sqrt{s}$=7 TeV have been studied with the ATLAS detector using the full 2011 data set with an integrated ...
      Journal article
    • Atmospheric Drag, Occultation 'N' Ionospheric Scintillation (ADONIS) mission proposal: Alpbach Summer School 2013 team orange 

      Hettrich, Sebastian; Kempf, Yann; Perakis, Nikolaos; Górski, Jędrzej; Edl, Martina; Urbář, Jaroslav; Dósa, Melinda; Gini, Francesco; Roberts, Owen W.; Schindler, Stefan; Schemmer, Maximilian; Steenari, David; Joldžić, Nina; Ødegaard, Linn-Kristine Glesnes; Sarria, David; Volwerk, Martin; Praks, Jaan (EDP Sciences, 2015)
      The Atmospheric Drag, Occultation ‘N’ Ionospheric Scintillation mission (ADONIS) studies the dynamics of the terrestrial thermosphere and ionosphere in dependency of solar events over a full solar cycle in Low Earth Orbit ...
      Journal article
    • Azimuthal anisotropy of D-meson production in Pb-Pb collisions at √sNN =2.76 TeV 

      Abelev, Betty; Adam, Jaroslav; Adamová, Dagmar; Aggarwal, Madan M.; Agnello, Michelangelo; Agostinelli, Andrea; Agrawal, Nikita; Ahammed, Zubayer; Ahmad, Nazeer; Ahn, Sang Un; 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, Sul-Ah; Ajaz, Muhammad; Akindinov, Alexander; Alt, Torsten; ALICE, Collaboration (American Physical Society, 2014-09)
      The production of the prompt charmed mesons D0, D+, and D*+ relative to the reaction plane was measured in Pb-Pb collisions at a center-of-mass energy per nucleon-nucleon collision of √sNN=2.76TeV with the ALICE detector ...
      Journal article
    • The BABAR detector: Upgrades, operation and performance 

      Eigen, Gerald; Stugu, Bjarne Sandvik; Sun, Liang; Aubert, Bernard; Asgeirsson, David J.; Atmacan, Hulya; Blinov, Vladimir E.; Bondioli, Mario; Brown, David Nathan; Buzykaev, Alexey; Campagnari, Claudio; Cheng, Chih-Hsiang; Druzhinin, Vladimir P.; Garra Tico, Jordi; Eisner, Alan M.; Gary, J. William; Golubev, Vladimir B.; Grauges, Eugeni; Hearty, Christopher; Hong, Tae Min; Kerth, Leroy T.; Khan, Akram; Kirby, David S.; Koch, Helmut; Kolomensky, Yury G.; Kovalskyi, Dmytro; Kravchenko, Evgeniy A.; Kroseberg, Jurgen; Lankford, Andrew J.; Lees, Jean-Pierre; Liu, Feng; Lockman, William S.; Long, Owen; Lynch, Gerald; Mandelkern, Mark A.; Martinez, Alfonso Joel; Mattison, Tom S.; McKenna, Janis A.; Richman, Jeffrey D.; Schroeder, Torsten; Schumm, Bruce Andrew; Seiden, Abe; Serednyakov, Sergey I.; Skovpen, Yuri I.; So, Rocky Y.; Solodov, Evgeni Petrovich; Tisserand, Vincent; Todyshev, Korneliy Yu.; Vitug, Gil M.; West, Christopher A.; BABAR, Collaboration (Elsevier, 2013-11-21)
      The BaBar detector operated successfully at the PEP-II asymmetric e+e− collider at the SLAC National Accelerator Laboratory from 1999 to 2008. This report covers upgrades, operation, and performance of the collider and the ...
      Journal article
    • Bacterial proteins with cleaved or uncleaved signal peptides of the general secretory pathway 

      De Souza, Gustavo Antonio; Leversen, Nils Anders; Målen, Hiwa; Wiker, Harald G (Elsevier, 2011-12-21)
      Correct protein compartmentalization is a key step for molecular function and cell viability, and this is especially true for membrane and externalized proteins of bacteria. Recent proteomic reports of Bacillus subtilis ...
      Journal article
    • Beauty production in pp collisions at √s=2.76 TeV measured via semi-electronic decays 

      Abelev, Betty; Adam, Jaroslav; Adamová, Dagmar; Aggarwal, Madan M.; Aglieri Rinella, Gianluca; Agostinelli, Andrea; Ahammed, Zubayer; Ahmad, Nazeer; Ahmad Masoodi, Arshar; Ahn, Sang Un; Alme, Johan; Djuvsland, Øystein; Erdal, Hege Austrheim; Helstrup, Håvard; Kileng, Bjarte; Altinpinar, Sedat; 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; 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; Langøy, Rune; Lien, Jørgen André; Ahn, Sul-Ah; Ajaz, Muhammad; Akindinov, Alexander; Aleksandrov, Dimitry; Alessandro, Bruno; Alici, Andrea; Alkin, Anton; Ljunggren, Hans Martin; ALICE, Collaboration (Elsevier, 2014-11)
      The ALICE Collaboration at the LHC reports measurement of the inclusive production cross section of electrons from semi-leptonic decays of beauty hadrons with rapidity |y|<0.8 and transverse momentum 1<pT<10 GeV/c, in pp ...
      Journal article
    • Birkeland current effects on high-latitude ground magnetic field perturbations 

      Laundal, Karl Magnus; Haaland, Stein; Lehtinen, Nikolai; Gjerløv, Jesper; Østgaard, Nikolai; Tenfjord, Paul; Reistad, Jone Peter; Snekvik, Kristian; Milan, Steve; Ohtani, Shin-ichi; Anderson, Brian J. (Wiley, 2015-09-18)
      Magnetic perturbations on ground at high latitudes are directly associated only with the divergence-free component of the height-integrated horizontal ionospheric current, J⊥,df. Here we show how J⊥,df can be expressed as ...
      Journal article
    • Characteristics of the flank magnetopause: Cluster observations 

      Haaland, Stein; Reistad, Jone Peter; Tenfjord, Paul; Gjerloev, Jesper W.; Maes, Lukas; deKeyser, Johan; Maggiolo, Romain; Anekallu, Chrandrasehkar; Dorville, Nicolas (WileyAmerican Geophysical Union, 2014-11)
      The magnetopause is a current sheet forming the boundary between the geomagnetic field on one side and the shocked solar wind on the other side. This paper discusses properties of the low-latitude dawn and dusk flanks ...
      Journal article
    • Charged-Higgs production in the Two-Higgs-doublet model — the τ ν channel 

      Basso, Lorenzo; Osland, Per; Pruna, Giovanni Marco (Springer, 2015-06-15)
      We update the allowed parameter space of the CP-violating 2HDM with Type II Yukawa couplings, that survives the current experimental and theoretical constraints on the model. For a representative set of allowed parameter ...
      Journal article
    • Charged-particle multiplicities in $pp$ interactions at $\sqrt{s}$ = 900 GeV measured with the ATLAS detector at the LHC 

      Aad, Georges; Buanes, Trygve; Burgess, Thomas; Eigen, Gerald; Johansen, Lars Gimmestad; Kastanas, Alex; Lipniacka, Anna; Mohn, Bjarte Alsaker; Øye, Ola Kristoffer; Sandaker, Heidi; Sjursen, Therese; Stugu, Bjarne; Tonoyan, Arshak; Ugland, Maren; Zutshi, V. (Elsevier, 2010-04)
      The first measurements from proton-proton collisions recorded with the ATLAS detector at the LHC are presented. Data were collected in December 2009 using a minimum-bias trigger during collisions at a centre-of-mass energy ...
      Journal article
    • Charged-particle multiplicity measurement in proton–proton collisions at √s = 0.9 and 2.36 TeV with ALICE at LHC 

      The ALICE Collaboration; Aamodt, K.; Abel, N.; Alme, Johan; Bablok, Sebastian Robert; Haaland, Øystein Senneset; Huang, M.; Kanaki, K.; Larsen, Dag Toppe; Nystrand, J.; Pommeresche, Bjørn; Skjerdal, Kyrre; Wagner, B. (Springer, 2010-07-12)
      Charged-particle production was studied in proton–proton collisions collected at the LHC with the ALICE detector at centre-of-mass energies 0.9 TeV and 2.36 TeV in the pseudorapidity range |η|<1.4. In the central region ...
      Peer reviewedJournal article
    • Charged-particle multiplicity measurement in proton–proton collisions at √s = 7 TeV with ALICE at LHC 

      The ALICE Collaboration; Aamodt, K.; Abel, N.; Abeysekara, U.; Alme, Johan; Bablok, Sebastian Robert; Fehlker, D.; Haaland, Øystein Senneset; Huang, M.; Larsen, Dag Toppe; Nystrand, J.; Ullaland, K.; Øvrebekk, G. (Springer, 2010-08-03)
      The pseudorapidity density and multiplicity distribution of charged particles produced in proton–proton collisions at the LHC, at a centre-of-mass energy Ös=7s=7 TeV, were measured in the central pseudorapidity region ...
      Peer reviewedJournal article
    • Chlorophyll a fluorescence lifetime reveals reversible UV-induced photosynthetic activity in the green algae Tetraselmis 

      Kristoffersen, Arne Skodvin; Hamre, Børge; Frette, Øyvind; Erga, Svein Rune (Springer, 2015)
      The fluorescence lifetime is a very useful parameter for investigating biological materials on the molecular level as it is mostly independent of the fluorophore concentration. The green alga Tetraselmis blooms in summer, ...
      Journal article
    • Climatology of aerosol optical properties in Northern Norway and Svalbard 

      Chen, Yi-Chun; Frette, Ø.; Stamnes, J. J.; Hamre, B. (European Geosciences Union, 2012-12-07)
      We present comparisons between estimates of the aerosol optical thickness and the °Angstr¨om exponent in Northern Norway and Svalbard based on data from AERONET stations at Andenes (69 ◦N, 16 ◦E, 379 m altitude) and ...
      Peer reviewedJournal article
    • Cluster observations of a field aligned current at the dawn flank of a bursty bulk flow 

      Snekvik, Kristian; Haaland, Stein; Østgaard, Nikolai; Hasegawa, H.; Nakamura, R.; Takada, T.; Juusola, L.; Amm, O.; Pitout, F.; Rème, H.; Klecker, B.; Lucek, E. A. (European Geosciences Union, 2007-06-29)
      This article describes observations of a bursty bulk flow (BBF) in the outer central plasma sheet. The observations are made with the Cluster satellites, located approximately 19RE downtail, close to the midnight sector ...
      Journal articlePeer reviewed
    • Combined positron emission tomography and computed tomography to visualize and quantify fluid flow in sedimentary rocks 

      Fernø, Martin; Gauteplass, Jarand; Hauge, Lars Petter; Abell, Geir Espen; Adamsen, Tom Christian; Graue, Arne (AGU (American Geophysical Union) Publications, 2015-09-22)
      Here we show for the first time the combined positron emission tomography (PET) and computed tomography (CT) imaging of flow processes within porous rocks to quantify the development in local fluid saturations. The coupling ...
      Journal article