Now showing items 474-493 of 1535

    • Holographic interferometry and its application in visualizing particle movements in continuous flow 

      Magnussen, Stian (Master thesis, 2004)
      This thesis presents the work performed at the Department of Physics and Technology at the University of Bergen during a collaborative project funded by Statoil. The parties in this collaboration were the University of ...
    • Holographic multi-stereogram constructed from computer images : Applied 3-D printer 

      Olsen, Kjell Einar (Master thesis, 1996)
      The aim of this thesis is to develop a method to convert computer images to a holographic film plate. In the recording process of holographic multi-stereograms, one uses a liquid crystal display (LCD) to show 70 different ...
    • How different safety barriers affect the margin between available and required evacuation time 

      Apeland, Wenche (Master thesis, 2015-06-01)
      The main purpose of this thesis has been to document that people can evacuate to temporarily safe locations / safe distances during the defined escalating jet fire scenario. It has been important to document that available ...
    • How do laypeople evaluate the degree of certainty in a weather report? A case study of the use of the Web service yr.no 

      Sivle, Anders Honningdal; Kolstø, Stein Dankert; Hansen, Pål Kirkeby; Kristiansen, Jens (Peer reviewed; Journal article, 2014-07)
      Many people depend on and use weather forecasts to plan their schedules. In so doing, ordinary people with no expertise in meteorology are frequently called upon to interpret uncertainty with respect to weather forecasts. ...
    • How Often Do Thermally Excited 630.0 nm Emissions Occur in the Polar Ionosphere? 

      Kwagala, Norah Kaggwa; Oksavik, Kjellmar; Lorentzen, Dag Arne; Johnsen, Magnar Gullikstad (Peer reviewed; Journal article, 2018-01)
      This paper studies thermally excited emissions in the polar ionosphere derived from European Incoherent Scatter Svalbard radar measurements from the years 2000–2015. The peak occurrence is found around magnetic noon, where ...
    • How the IMF By induces a By component in the closed magnetosphere and how it leads to asymmetric currents and convection patterns in the two hemispheres 

      Tenfjord, Paul; Østgaard, Nikolai; Snekvik, Kristian; Laundal, Karl Magnus; Reistad, Jone Peter; Haaland, Stein; Milan, Steve (Peer reviewed; Journal article, 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. ...
    • Hydratdannelse og metanproduksjon fra gasshydrat - produksjonsmetoder og resistivitetsutvikling 

      Odland, Jonas (Master thesis, 2009-11-20)
      Ved høye trykk og lave temperaturer kan vannmolekyler danne strukturelle bur rundt et gjestemolekyl. Denne substansen er da i fast form og kalles hydrat. I naturlig forekomst av gasshydrat er metan det vanligste gjestemolekylet. ...
    • Hydrate Formation and CH4 Production from Natural Gas Hydrates - Emphasis on Boundary Conditions and Production Methods 

      Birkedal, Knut Arne (Master thesis, 2009-05-13)
      Natural gas hydrate is a solid state of gas and water at low temperature and high pressure. Gas hydrates are known to form hydrate plugs in production line, and has thus generally been considered a problem to the oil ...
    • Hydrate formation and CO2 - CH4 exchange in sandstone - An experimental study with emphasis on the role of initial brine saturation and salinity 

      Berge, Hans (Master thesis, 2013-06-01)
      Recent research activity has demonstrated the viability of producing methane from gas hydrate bearing sediments by injecting and sequestering CO2 in a process where CO2 replace methane in gas hydrate by a process called ...
    • Hydrate Monitoring using Capacitive Sensors 

      Bayati, Zahra (Master thesis, 2013-06-02)
      Gas hydrates are of particular interest in petroleum industry since their formation during oil-production can be a major risk factor. Gas hydrates can block pipelines, interrupt production, and in worst case even cause ...
    • Hydrate Plugging and Flow Remediation during CO2 Injection in Sediments 

      Gauteplass, Jarand; Almenningen, Stian; Barth, Tanja; Ersland, Geir (Journal article; Peer reviewed, 2020)
      Successful geological sequestration of carbon depends strongly on reservoir seal integrity and storage capacity, including CO2 injection efficiency. Formation of solid hydrates in the near-wellbore area during CO2 injection ...
    • Hydrate Production Philosophy and Thermodynamic Calculations 

      Kvamme, Bjørn; Zhan, Jinzhou; Wei, Na; Sun, Wantong; Saeidi, Navid; Pei, Jun; Kuznetsova, Tatiana (Journal article; Peer reviewed, 2020)
      The amount of energy in the form of natural gas hydrates is huge and likely substantially more than twice the amount of worldwide conventional fossil fuel. Various ways to produce these hydrates have been proposed over the ...
    • Hydrodynamical studies of Quark Gluon Plasma: Collective behaviour, initial fluctuations and theoretical fundaments 

      Skålvik, Astrid Marie (Master thesis, 2012-05-30)
      This master thesis focuses on collective behaviour of the Quark Gluon Plasma, created at the Large Hadron Collider at CERN. We calculate analytically and semi-analytically the transverse momentum and rapidity dependence ...
    • Hydroelectric Power in Present and Future Energy Systems 

      Svendsen, Tjalve Magnusson (Master thesis, 2013-06-03)
      To be able to understand the dynamics of energy systems, the interplay between a variety of factors affecting them has to be addressed. In this thesis, we look at issues like climate change, energy policy, power transmission, ...
    • Identification of boosted Higgs bosons decaying into b-quark pairs with the ATLAS detector at 13 TeV 

      Aad, Georges; Abbott, Brad; Abbott, Dale C.; Abdinov, Ovsat Bahram oglu; Abed Abud, Adam; Abeling, Kira; Abhayasinghe, Deshan Kavishka; Abidi, Syed Haider; AbouZeid, Hass; Abraham, Nadine L.; Bjørke, Kristian; Bugge, Magnar Kopangen; Cameron, David Gordon; Catmore, James Richard; Feigl, Simon; Garonne, Vincent; Gramstad, Eirik; Hellesund, Simen; Morisbak, Vanja; Oppen, Henrik; Ould-Saada, Farid; Pedersen, Maiken; Read, Alexander Lincoln; Røhne, Ole Myren; Sandaker, Heidi; Vadla, Knut Oddvar Høie; Buanes, Trygve; Djuvsland, Julia Isabell; Eigen, Gerald; Fomin, Nikolai; Lee, Graham Richard; Lipniacka, Anna; Martin dit Latour, Bertrand; Mæland, Steffen; Stugu, Bjarne; Træet, Are Sivertsen; Abramowicz, Halina; Abreu, Henso; Abulaiti, Yiming; Acharya, Bobby S.; Achkar, Baida; Adachi, Shunsuke; Adam, Lennart; Adam-Bourdarios, Claire; Adamczyk, Leszek; Adamek, Lukas; Adelman, Jareed; Adersberger, Michael; Adigüzel, Aytül; Adorni, Sofia; ATLAS, Collaboration (Peer reviewed; Journal article, 2019)
      This paper describes a study of techniques for identifying Higgs bosons at high transverse momenta decaying into bottom-quark pairs, H→bb¯, for proton–proton collision data collected by the ATLAS detector at the Large ...
    • Identifikasjon av undervannsobjekter ved bruk av ultralyd 

      Spjeld, Cato (Master thesis, 2018-09-04)
      Hensikten med dette prosjektet er å undersøke om ultralyd kan benyttes som et detekteringssystem under vann. Det er blitt designet tre ulike reflektorer for å se på refleksjonsegenskapene til disse. Fjernstyrte undervannsfarkoster ...
    • Image formation in the scanning helium microscope 

      Fahy, Adam; Eder, Sabrina Daniela; Barr, Matt; Martens, Joel; Myles, T.A.; Dastoor, Paul C. (Peer reviewed; Journal article, 2018)
      The scanning helium microscope (SHeM) is a new addition to the array of available microscopies, particularly for delicate materials that may suffer damage under techniques utilising light or charged particles. As with all ...
    • Image quality of list-mode proton imaging without front trackers 

      Sølie, Jarle Rambo; Volz, Lennart; Pettersen, Helge Egil Seime; Piersimoni, Pierluigi; Odland, Odd Harald; Røhrich, Dieter; Helstrup, Håvard; Peitzmann, Thomas; Ullaland, Kjetil; Varga-Kofarago, Monika; Mehendale, Shruti Vineet; Grøttvik, Ola Slettevoll; Eikeland, Viljar Nilsen; Meric, Ilker; Seco, Joao (Journal article; Peer reviewed, 2020)
      List mode proton imaging relies on accurate reconstruction of the proton most likely path (MLP) through the patient. This typically requires two sets of position sensitive detector systems, one upstream (front) and one ...
    • The impact of energetic electron precipitation on mesospheric hydroxyl during a year of solar minimum 

      Zawedde, Annet Eva; Tyssøy, Hilde Nesse; Hibbins, Robert Edward; Espy, Patrick Joseph; Degaard, L-K.; Sandanger, Marit Irene; Stadsnes, Johan (Peer reviewed; Journal article, 2016-06)
      In 2008 a sequence of geomagnetic storms occurred triggered by high-speed solar wind streams from coronal holes. Improved estimates of precipitating fluxes of energetic electrons are derived from measurements on board the ...