Recent additions

  • Time-lapse seismic analysis of focused fluid flow on the Vestnesa Ridge 

    Mathisen, Lena Myreng (Master thesis; Mastergradsoppgave, 2016-06-01)
    The Vestnesa Ridge is a large sediment drift at water depths of 1200-1300 meter and is the northernmost known gas hydrate province that exists along the Arctic continental margin. Several pockmarks connected to vertical ...
  • Depositional environments of the Upper Triassic Snadd Formation on the Loppa High, SW Barents Sea 

    Johansen, Stian André (Master thesis; Mastergradsoppgave, 2016-06-01)
    This thesis has focused on the depositional environments of the Upper Triassic Snadd Formation. This formation covers the time-period Ladinian to early Norian with multiple marine regressions and transgressions, resulting ...
  • Repeatability of P-Cable 3D seismic data 

    Mathisen, Lisa Myreng (Master thesis; Mastergradsoppgave, 2016-05-31)
    The use of 4D time-lapse seismic data is a viable technology for monitoring fluid changes in the subsurface using conventional data, e.g. reservoir exploitation and CO2 storage. In this master thesis, the potential for ...
  • Seabed depressions in the Ingøydjupet Trough and their relation to buried canyons on the Loppa High, Barents Sea 

    Prytz, Richard (Master thesis; Mastergradsoppgave, 2016-06-13)
    Large seabed depressions in the Ingøydjupet Trough have previously been interpreted to be formed by sub-glacial melt-water. However, fluid migration and gas expulsion occur over large parts of the Barents Sea, which are ...
  • Renewable Energy Resources: A Case Study on Asko Nord AS 

    Solstad, Sondre (Master thesis; Mastergradsoppgave, 2016-06-01)
    Asko Nord AS i a business located in Ramfjorden just outside of Tromsø. In this theses, their potential to produce electricity from renewable resources at their location is investigated. Wind around the building is to ...
  • Investigation of seafloor craters and mounds in the central Barents Sea 

    Sørbø, Magnus (Master thesis; Mastergradsoppgave, 2016-06-01)
    Recently acquired datasets of multibeam, echosounder and seismic data reveal the geomorphology and distribution of seafloor craters and mounds in central Barents Sea. The study found 288 craters, 227 pingos and 119 gas ...
  • Shallow and Deep Seismic Amplitude Anomalies Indicate Times of Fluid Accumulation and Tectonic Activity in the Barents Sea 

    Pedersen, Magnus (Master thesis; Mastergradsoppgave, 2016-06-01)
    This master thesis studied the 3D-seismic dataset ST0825 located in the southwest Barents Sea. Aiming to map seismic anomalies and faults above and below the Upper Regional Unconformity (URU). The survey partly covers ...
  • Possible gas hydrates on the Bjarmeland Platform; seismic expression and stability modelling 

    Løvaas, John Sverre (Master thesis; Mastergradsoppgave, 2016-05-24)
    Seismic evidence of shallow gas anomalies are prominent at Ververis Dome structure and Hoop Fault Complex in Bjarmeland Platform. Ubiquitous high amplitude anomalies at the same depth as these shallow gas anomalies infer ...
  • Fluid flow features and gas hydrates in the outer Vøring Basin 

    Varjola, Carita E. Eira (Master thesis; Mastergradsoppgave, 2015-12-15)
    The 3D seismic survey ST0827 in the outer Vøring Basin reveals a complex fluid flow system consisting of hydrothermal vents, polygonal faults and acoustic pipes. The polygonal faults are bound to the fine-grained Top Brygge ...
  • Late summer sea ice segmentation with multi-polarisation SAR features in C- and X-band 

    Fors, Ane Schwenke; Brekke, Camilla; Doulgeris, Anthony Paul; Eltoft, Torbjørn; Renner, Angelika; Gerland, Sebastian (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-09-01)
    In this study we investigate the potential of sea ice segmentation by C- and X-band multi-polarisation synthetic aperture radar (SAR) features during late summer. Five high-resolution satellite SAR scenes were recorded ...
  • Sensitive on-chip methane detection with a cryptophane-A cladded Mach-Zehnder interferometer 

    Dullo, Firehun Tsige; Lindecrantz, Susan; Jagerska, Jana; Hansen, Jørn H; Engqvist, Stig Olov Magnus; Solbø, Stian; Hellesø, Olav Gaute (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-11-24)
    We report a methane sensor based on an integrated Mach-Zehnder interferometer, which is cladded by a styrene-acrylonitrile film incorporating cryptophane-A. Cryptophane-A is a supramolecular compound able to selectively ...
  • Optical transport, lifting and trapping of micro-particles by planar waveguides 

    Helle, Øystein Ivar; Ahluwalia, Balpreet Singh; Hellesø, Olav Gaute (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-03-03)
    Optical waveguides can be used to trap and transport micro-particles. The particles are held close to the waveguide surface by the evanescent field and propelled forward. We propose a new technique to lift and trap particles ...
  • Eastward-expanding auroral surges observed in the post-midnight sector during a multiple-onset substorm 

    Tanaka, Yoshimasa; Ogawa, Yasunobu; Kadokura, Akira; Partamies, Noora; Whiter, Daniel; Enell, Carl-Fredrik; Brändström, Urban; Sergienko, Tima; Gustavsson, Björn Johan; Kozlovsky, Alexander; Miyaoka, Hiroshi; Yoshikawa, Akimasa (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-11-09)
    We present three eastward-expanding auroral surge (EEAS) events that were observed intermittently at intervals of about 15 min in the post-midnight sector (01:55–02:40 MLT) by all-sky imagers and magnetometers in ...
  • 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 (Journal article; Tidsskriftartikkel; Peer reviewed, 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 ...
  • Polarimetric SAR Change Detection with the Complex Hotelling-Lawley Trace Statistic 

    Akbari, Vahid; Anfinsen, Stian Normann; Doulgeris, Anthony Paul; Eltoft, Torbjørn; Moser, Gabriele; Serpico, Sebastian Bruno (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-03-15)
    In this paper, we propose a new test statistic for unsupervised change detection in polarimetric radar images. We work with multilook complex covariance matrix data, whose underlying model is assumed to be the scaled complex ...
  • The environment-induced cracking of as-annealed Ni3(Si,Ti) and Ni3(Si,Ti) with 2Mo in sodium chloride solutions 

    Priyotomo, Gadang; Wagle, Sanat; Okitsu, Kenji; Iwase, Akihiro; Kaneno, Yasuyuki; Nishimura, Rokuro; Takasugi, Takayuki (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-08-01)
    Background The environment-induced cracking (EIC) of as-annealed Ni3(Si,Ti) and Ni3(Si,Ti) with 2Mo has been researched as functions of applied stress, chloride ion concentration, test temperature, and pH. Methods The ...
  • Chip-based optical microscopy for imaging membrane sieve plates of liver scavenger cells 

    Helle, Øystein Ivar; Øie, Cristina Ionica; McCourt, Peter Anthony; Ahluwalia, Balpreet Singh (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-08-26)
    The evanescent field on top of optical waveguides is used to image membrane network and sieve-plates of liver endothelial cells. In waveguide excitation, the evanescent field is dominant only near the surface (~100-150 ...
  • Hon förebygger miljökatastrofer 

    Johansson, Malin; Avenius, Malin (Others; Andre, 2015)
    Det får inte hända. men om det ändå gör det behövs ny teknik för att mildra effekterna. Malin Johanssons forskning handlar om att förebygga miljökatastrofer, när oljebolagen söker sig allt längre in i Arktis.
  • Imaging Sea Ice Structure by Remote Sensing Sensors 

    Eltoft, Torbjørn; Doulgeris, Anthony Paul; Brekke, Camilla; Solbø, Stian; Gerland, Sebastian; Hanssen, Alfred (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-06-14)
    This paper will investigate how new developments in remote sensing and sensor technologies can be applied to image the structure of the sea ice surface. Both segmentation of multipolarimetric synthetic aperture radar ...
  • Characterization of a waveguide Mach-Zehnder interferometer using PDMS as a cover layer 

    Lindecrantz, Susan Mariah; Tinguely, Jean-Claude; Ahluwalia, Balpreet Singh; Hellesø, Olav Gaute (Journal article; Tidsskriftartikkel; Peer reviewed, 2015)
    A Mach-Zehnder interferometer made with shallow rib waveguides is studied experimentally and using simulations. The rib-height giving single-mode guidance is found as function of core thickness and polarization. Devices ...

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