Blar i Department of Physics and Technology på tittel

Viser treff 1889-1908 av 2128

    • Solar illumination dependence of the auroral electrojet intensity: Interplay between the solar zenith angle and dipole tilt 

      Ohtani, Shinici; Gjerløv, Jesper; Johnsen, Magnar Gullikstad; Yamauchi, Masatoshi; Brändström, Urban; Lewis, Andrew M. (Peer reviewed; Journal article, 2019-08)
      The present study investigates the dependence of the local auroral electrojet (AEJ) intensity on solar illumination by statistically examining northward geomagnetic disturbances in the auroral zone in terms of the solar ...

    • Solar radiation energy on the Tibetan plateau 

      Gelsor, Nuozhen (Master thesis, 2015-11-20)
      To gain a thorough knowledge of the solar energy resources on the Tibetan Plateau, measured and modeled solar irradiance levels on the Plateau from July 2010 to September 2013 are considered. The Tibetan Plateau lies in ...

    • Solar Wind and Seasonal Influence on Ionospheric Currents From Swarm and CHAMP Measurements 

      Laundal, Karl Magnus; Finlay, Christopher C.; Olsen, N; Reistad, Jone Peter (Peer reviewed; Journal article, 2018-05-29)
      We present a new climatological model of the ionospheric current system, determined from magnetic measurements taken by the Challenging Minisatellite Payload (CHAMP) and Swarm satellites. The model describes the horizontal ...

    • Solar Wind—Magnetosphere Coupling During Radial Interplanetary Magnetic Field Conditions: Simultaneous Multi-Point Observations 

      Toledo-Redondo, Sergio; Hwang, Kyoung-Joo; Escoubet, C. P.; Lavraud, Benoit; Fornieles, J.; Aunai, N.; Fear, R.C.; Dargent, J.; Fu, Huishan; Fuselier, Stephen A.; Genestreti, K.J.; Khotyaintsev, Yuri V.; Li, Wenya; Norgren, Astrid Elisabet Cecilia; Phan, Tai D. (Journal article; Peer reviewed, 2021)
      In-situ spacecraft missions are powerful assets to study processes that occur in space plasmas. One of their main limitations, however, is extrapolating such local measurements to the global scales of the system. To overcome ...

    • Solubilisering av 1 - pentanol og 1 - heksanol i natriumkolat og i en blanding av natriumkolat og natrium dodecylsulfat 

      Halstenrud, Hanne (Master thesis, 2014-06-01)
      Micelledannelse og alkoholsolubilisering i vandig løsning NaC, natriumkolat, og ekvimolal blanding av NaC og NaDS, natrium dodecylsulfat, er undersøkt ved tetthets - og lydhastighetsmålinger ved 25 oC og atmosfæretrykk. ...

    • Some properties of the generic 2HDM in the alignment limit 

      Grzadkowski, Bohdan; Øgreid, Odd Magne; Osland, Per (Peer reviewed; Journal article, 2017)
      We discuss various properties of the generic two-Higgs-doublet extension of the Standard Model focusing on the region of parameter space known as the alignment limit. We emphasize that in the alignment limit in order to ...

    • Sound velocity cell for gas characterization 

      Norli, Petter (Doctoral thesis, 2007-11-30)

    • Space and atmospheric physics on Svalbard: a case for continued incoherent scatter radar measurements under the cusp and in the polar cap boundary region 

      Baddeley, Lisa; Lorentzen, Dag Arne; Haaland, Stein Egil; Heino, Erkka Petteri; Mann, Ingrid Brigitte; Miloch, Wojciech Jacek; Oksavik, Kjellmar; Partamies, Noora; Spicher, Andres; Vierinen, Juha-Pekka (Journal article; Peer reviewed, 2023)
      Incoherent scatter radars (ISRs) represent the only instrument (both ground and space based) capable of making high temporal and spatial resolution measurements of multiple atmospheric parameters—such as densities, ...

    • Space and Energy Distribution of Dark Matter 

      Blitzner, Åsmund (Master thesis, 2011-11-17)
      I start by an introduction to the notion of, and motivation for, Dark Matter, as well as a short motivation for supersymmetry, the theoretical framework usually examined when looking for places that dark matter may hide. ...

    • A space hurricane over the Earth’s polar ionosphere 

      Zhang, Qing-He; Zhang, Yong-Liang; Wang, Chi; Oksavik, Kjellmar; Lyons, Larry R.; Lockwood, Michael; Yang, Hui-Gen; Tang, Bin-Bin; Moen, Jøran Idar; Xing, Zan-Yang; Ma, Yu-Zhang; Wang, Xiang-Yu; Ning, Ya-Fei; Xia, Li-Dong (Journal article; Peer reviewed, 2021)
      In Earth’s low atmosphere, hurricanes are destructive due to their great size, strong spiral winds with shears, and intense rain/precipitation. However, disturbances resembling hurricanes have not been detected in Earth’s ...

    • Space weather challenges of the polar cap ionosphere 

      Moen, Jøran Idar; Oksavik, Kjellmar; Alfonsi, Lucilla; Dåbakk, Yvonne Rinne; Romano, Vineenzo; Spogli, Luca (Peer reviewed; Journal article, 2013)
      This paper presents research on polar cap ionosphere space weather phenomena conducted during the European Cooperation in Science and Technology (COST) action ES0803 from 2008 to 2012. The main part of the work has been ...

    • Space Weather impact on the degradation of NOAA POES MEPED proton detectors 

      Ødegaard, Linn-Kristine Glesnes; Tyssøy, Hilde Nesse; Sandanger, Marit Irene; Stadsnes, Johan; Søraas, Finn (Peer reviewed; Journal article, 2016-06-07)
      The Medium Energy Proton and Electron Detector (MEPED) on board the National Oceanic and Atmospheric Administration Polar Orbiting Environmental Satellites (NOAA POES) is known to degrade with time. In recent years a lot ...

    • Spatial Agreement of Brainstem Dose Distributions Depending on Biological Model in Proton Therapy for Pediatric Brain Tumors 

      Fjæra, Lars Fredrik; Indelicato, Daniel J.; Ytre-Hauge, Kristian; Muren, Ludvig Paul; Lassen-Ramshad, Yasmin; Toussaint, Laura; Dahl, Olav; Stokkevåg, Camilla Hanquist (Journal article; Peer reviewed, 2021)
      Purpose During radiation therapy for pediatric brain tumors, the brainstem is a critical organ at risk, possibly with different radio-sensitivity across its substructures. In proton therapy, treatment planning is currently ...

    • Spatial evolution of magnetic reconnection diffusion region structures with distance from the X-line 

      Oieroset, M; Phan, Tai D.; Ergun, R.E.; Ahmadi, N.; Genestreti, K.; Drake, J. F.; Liu, Y.; Haggerty, CM; Eastwood, JP; Shay, M.A.; Pyakural, P.; Haaland, Stein Egil; Oka, M; Goodbred, M; Eriksson, S; Burch, J. L.; Torbert, R; Khotyaintsev, Y; Russell, C. T.; Strangeway, R; Gershman, D.J.; Giles, B. L. (Journal article; Peer reviewed, 2021)
      We report Magnetospheric Multiscale four-spacecraft observations of a thin reconnecting current sheet with weakly asymmetric inflow conditions and a guide field of approximately twice the reconnecting magnetic field. The ...

    • Spatial Resolution in Inverse Problems: The EZIE Satellite Mission 

      Madelaire, Michael; Laundal, Karl Magnus; Gjerloev, J.; Hatch, Spencer Mark; Reistad, Jone Peter; Vanhamäki, H.; Waters, Colin; Ohma, Anders; Mesquita, Rafael L. A.; Merkin, Viacheslav (Journal article; Peer reviewed, 2023)
      Inverse modeling has become one of the primary methods for studying ionospheric electrodynamics, especially when using magnetic field measurements from below the ionosphere. We present a method for quantifying the spatial ...

    • Spatial Variation in the Responses of the Surface External and Induced Magnetic Field to the Solar Wind 

      Shore, R.M; Freeman, MP; Coxon, John C.; Thomas, EG; Gjerløv, Jesper; Olsen, N. (Peer reviewed; Journal article, 2019-07-05)
      We analyze the spatial variation in the response of the surface geomagnetic field (or the equivalent ionospheric current) to variations in the solar wind. Specifically, we regress a reanalysis of surface external and induced ...

    • Special Core Analysis of Low Reservoir Quality Chalk 

      Høyvik, Mari (Master thesis, 2016-11-19)
      This experimental work investigates Low Reservoir Quality Chalk (LRQC) reservoir properties using outcrop samples from six zones. The thesis is part of Joint Chalk Research Programme, Phase 7 (JCR 7), a large interdisciplinary ...

    • Spectra and mean multiplicities of π− in central 40Ar+45Sc collisions at 13A, 19A, 30A, 40A, 75A and 150A GeV/c beam momenta measured by the NA61/SHINE spectrometer at the CERN SPS 

      Acharya, A.; Adhikary, H.; Allison, K.K.; Andronov, E.V.; Antićić, T.; Babkin, V.; Baszczyk, M.; Bhosale, S.; Blondel, A.; Bogomilov, M.; Brandin, A.; Bravar, A.; Bryliński, W.; Brzychczyk, J.; Buryakov, M.; Busygina, O.; Bzdak, A.; Cherif, H.; Ćirković, M.; Csanad, M.; Cybowska, J.; Czopowicz, T.; Damyanova, A.; Davis, N.; Deliyergiyev, M; Deveaux, M.; Dmitriev, A.; Dominik, W.; Dorosz, P.; Dumarchez, J.; Engel, Ralph; Feofilov, G.A.; Fields, L.; Fodor, Z.; Garibov, A.; Gaździcki, M.; Golosov, O.; Golovatyuk, V.; Golubeva, M.; Grebieszkow, K.; Guber, F.; Haesler, A.; Igolkin, S.N.; Ilieva, S.; Ivashkin, A.; Johnson, S.R.; Kadija, K.; Kargin, N.; Kashirin, E.; Kiełbowicz, M.; Kireyeu, V.A.; Klochkov, V.; Kolesnikov, V; Kolev, D.; Korzenev, A.; Kovalenko, V.N.; Kowalski, S.; Koziel, M.; Kozłowski, B.; Krasnoperov, A.; Kucewicz, W.; Kuich, M.; Kurepin, A.; Larsen, D.; László, A.; Lazareva, T.V.; Lewicki, M.; Łojek, K.; Lyubushkin, V.V.; Maćkowiak-Pawłowska, M.; Majka, Z.; Maksiak, B.; Malakhov, A.I.; Marcinek, A.; Marino, A.D.; Marton, K.; Mathes, H.-J.; Matulewicz, T.; Matveev, V.; Melkumov, G.L.; Merzlaya, A.O.; Messerly, B.; Mik, L.; Morozov, S.; Nagai, Y; Naskręt, M.; Ozvenchuk, V.; Paolone, V.; Petukhov, O.; Pidhurskyi, I.; Płaneta, R.; Podlaski, P.; Popov, B.A.; Porfy, B.; Posiadała-Zezula, M.; Prokhorova, D.S.; Pszczel, D.; Puławski, S.; Puzović, J.; Ravonel, M.; Renfordt, R.; Röhrich, Dieter; Rondio, E.; Roth, M.; Rumberger, B.T.; Rumyantsev, M.; Rustamov, A.; Rybczynski, M.; Rybicki, A.; Sadhu, S.; Sadovsky, A.; Schmidt, K.; Selyuzhenkov, I.; Seryakov, A. Yu.; Seyboth, P.; Słodkowski, M.; Staszel, P.; Stefanek, G.; Stepaniak, J.; Strikhanov, M.; Ströbele, H.; Šuša, T.; Taranenko, A.; Tefelska, A.; Tefelski, D.; Tereshchenko, V.; Toia, A.; Tsenov, R.; Turko, L.; Ulrich, R.; Unger, M.; Uzhva, D.; Valiev, F.F.; Veberič, D.; Vechernin, V.V.; Wickremasinghe, A.; Wójcik, K.; Wyszyński, O.; Zaitsev, A.; Zimmerman, E.D.; Zwaska, R. (Journal article; Peer reviewed, 2021)
      The physics goal of the strong interaction program of the NA61/SHINE experiment at the CERN Super Proton Synchrotron (SPS) is to study the phase diagram of hadronic matter by a scan of particle production in collisions of ...

    • Spectral albedo and transmittance of thin young Arctic sea ice 

      Taskjelle, Torbjørn; Hudson, Stephen R.; Granskog, Mats A.; Nicolaus, Marcel; Lei, Ruibo; Gerland, Sebastian; Stamnes, Jakob J.; Hamre, Børge (Peer reviewed; Journal article, 2016-01)
      Spectral albedo and transmittance in the range 400–900nm were measured on three separate dates on less than 15 cm thick new Arctic sea ice growing on Kongsfjorden, Svalbard at 78:9°N, 11:9°E. Inherent optical properties, ...

    • Spectral Analysis of Individual Terrestrial Gamma-ray Flashes Detected by ASIM 

      Lindanger, Anders; Marisaldi, Martino; Sarria, David Alexandre Stephan; Østgaard, Nikolai; Lehtinen, Nikolai Grigorievich; Skeie, Chris Alexander Kallevik; Mezentsev, Andrey; Kochkin, Pavlo; Ullaland, Kjetil; Yang, Shiming; Genov, Georgi; Carlson, Brant Edward; Köhn, Christoph; Navarro-Gonzalez, Javier; Connell, Paul H.; Reglero, Victor; Neubert, Torsten (Journal article; Peer reviewed, 2021)
      The Atmosphere-Space Interactions Monitor (ASIM) is the first instrument in space specifically designed to observe terrestrial gamma-ray flashes (TGFs). TGFs are high energy photons associated with lightning flashes and ...