Fakultet for naturvitenskap og teknologi: Nye registreringer

Viser treff 4481-4500 av 5442

    • Correlation between changes in paleoceanography, paleoclimate and methane seepage on Vestnesa Ridge, eastern Fram Strait. 

      Myrvang, Karoline (Master thesis; Mastergradsoppgave, 2015-12-21)
      Two sediment cores HH14-002 GC and HH12-930 GC from Vestnesa Ridge in the eastern part of Fram Strain have been investigated to reconstruct the paleoclimate and paleoceanographic conditions during the last ~37,000 years, and to study possibly changes in emission of methane from the seabed through time. Core HH14-002 GC was taken from outside a pockmark, while core HH12-930 GC was taken from inside ...

    • Palaeoceanographic development in Leirdjupet Trough, western Barents Sea, during the Holocene: evidence from foraminiferal, isotopic and sedimentological records 

      Kovalenko, Boriss (Master thesis; Mastergradsoppgave, 2015-12-14)
      The gravity core HH14-012GC from Leirdjupet Trough has been investigated to detect changes in sedimentation and the variations in distribution patterns of marine microorganisms (Planktic and Benthic Foraminifera) and stable isotope values of their shells to reconstruct the variability of the inflow of Atlantic water to the study area. The results are compared to published paleodata records to ...

    • Til IBGs 20-års-jubileum 

      Labugt, Sylvia (Kronikk; Chronicle, 1992)

    • Institutt for matematiske realfag 1972-1992. IMR 20 år. Knutepunkter i instituttets historie og perspektiver på fag og fremtid 

      Jervell, Herman Ruge; Johnsen, Ben (Research report; Forskningsrapport, 1992)

    • Morphodynamics of a sandy beach during a one-year cycle at Sandbukt, Breivika, Troms, northern Norway 

      Jóhannesson, Jóhannes Marteinn (Master thesis; Mastergradsoppgave, 2015-12-11)
      Six cross-shore beach profiles were monitored in a monthly interval at Sandbukt Beach at Breivikeidet, from October 2014 to October 2015, in order to study impact of storms on the beach profile and understand monthly, seasonal, and annual changes in the beach profile. Change in beach volume showed erosion and decrease in beach width on the southern part of the beach during the winter season, while ...

    • Freia: Exploring Biological Pathways Using Unity3D 

      Knudsen, Kenneth (Master thesis; Mastergradsoppgave, 2015-11-15)
      To understand the biological processes related to the development of cancer there is a need for interactive data visualization tools that integrates experimental data with biological knowledge. Existing visualization tools have shown their usefulness, but next-generation biological data analysis requires both integrating different data types and larger datasets. This requires data exploration tools ...

    • Risiko og sikkerhetskrav hos norske alenefiskere 

      Fagerborg, Hilde Hansen (Master thesis; Mastergradsoppgave, 2014-12-15)
      Fisker blir omtalt som Norges farligste yrke (Benjaminsen, 2013). En alenefisker er person som jobber alene om bord et mindre fartøy. Det er mye som kan gå galt om bord en sjark, og man kan være langt fra land når ulykken inntreffer og det kan være vanskelig å få hjelp. Problemstillingen for denne oppgaven er: «Hvordan vurderer alenefiskeren egen risiko, og hvordan forholder de seg til lovpålagte ...

    • Sedimentære avsetningsmiljøer og deglasiasjonshistorie i Kaldfjorden, Kvaløya, Troms Fylke 

      Hermansen, Hermann Olaussen (Master thesis; Mastergradsoppgave, 2015-11-15)
      Multi-proxy analyser av tre sedimentkjerner som inkluderer litostratigrafi, fysiske egenskaper og XRF kjerne skanning, har sammen med analyser av høyoppløselig seismisk data blitt integrert for å kunne rekonstruere deglasiasjonshistorien og paleo miljøet i Kaldfjorden på Kvaløya, Troms fylke. I Kaldfjorden er stor-skala batymetrien delt inn i fire hoved-basseng med en sedimentmektighet på opptil ...

    • Sedimentære avsetningsmiljøer og deglasiasjonshistorie i Ersfjorden, Kvaløya, Troms fylke. 

      Olsen, Joakim Andre (Master thesis; Mastergradsoppgave, 2015-11-15)
      «Multi-proxy» analyser av tre sedimentkjerneprøver (inkludert litostratigrafi, fysiske egenskaper, kornfordelingsanalyse og XRF skanning) og analyse av høyoppløselige seismiske data ble korrelert for å belyse sedimentasjonsprosesser og rekonstruere deglasiasjonshistorie, samt postglasialt sedimentasjonsmiljø under sen Weichsel og Holocen i Ersfjorden på Kvaløya, nordvest i Troms fylke. Tre ...

    • Web-Based Surgical Telementoring. Service design and evaluation of the key features. 

      Budrionis, Andrius (Doctoral thesis; Doktorgradsavhandling, 2015-10-13)
      This thesis provides a detailed outlook on research in telementoring, identifying the fundamental limitations hindering its smooth integration into clinical practice. The findings are based on literature reviews and user involvement, minimizing the gap between research and actual use of the system. To address the identified shortcomings, a service-oriented approach to clinical VC systems was proposed. ...

    • Insights into bacterial protection and survival. A study of three enzymes from cold-adapted bacteria 

      Grgic, Miriam (Doctoral thesis; Doktorgradsavhandling, 2015-10-02)
      Bacteria are the most abundant organisms and can be found in different habitats, from polar regions, deserts and volcanoes, deep ocean trenches to the upper atmosphere. In all these environments, they are exposed to various chemical hazards, such as antibacterial chemicals (antibiotics) produced by other organisms that are found in the same habitat. In addition, they are exposed to threats from ...

    • Late Quaternary paleoceanography of the northern continental margin of Svalbard 

      Chauhan, Teena (Doctoral thesis; Doktorgradsavhandling, 2015-08-27)
      This study focuses on the reconstruction of the variability of Atlantic Water inflow to the Arctic Ocean and its influence on the Svalbard-Barents Sea Ice Sheet (SBIS), sea-ice cover, variations in the bottom current strength and the depositional environment in the past. For this reconstruction, the distribution patterns of planktic and benthic foraminiferal assemblages, oxygen and carbon stable ...

    • Role of subsea permafrost and gas hydrate in postglacial Arctic methane releases 

      Portnov, Aleksei D (Doctoral thesis; Doktorgradsavhandling, 2015-09-18)
      Greenhouse gas methane is contained as gas hydrate, an icy structure, under the seabed in enormous amounts of Arctic regions. West Svalbard continental margin, which we investigated here, is one of these regions. Also, in the Russian Kara Sea the subsea permafrost is acting as a cap for the gas to be released in the future. But continuous expulsions of methane have been already observed in both ...

    • Mesospheric temperatures and sodium properties measured with the ALOMAR Na lidar compared with WACCM 

      Dunker, Tim; Hoppe, Ulf-Peter; Feng, Wuhu; Plane, John M.C.; Marsh, Daniel R. (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-01-16)
      We present a comparison of the temperature and sodium layer properties observed by the ALOMAR Na lidar (69.3°N, 16.0°E) and simulated by the Whole Atmosphere Community Climate Model with specified dynamics and implemented sodium chemistry (WACCM-Na). To constrain the meteorological fields below 60 km, we use MERRA and GEOS-5. For the years 2008 to 2012, we analyse daily averages of temperature ...

    • Evaluation of the power efficiency of UPC, OpenMP and MPI 

      Lagraviere, Jeremie; Ha, Hoai Phuong; Cai, Xing (Research report; Forskningsrapport, 2015)
      In this study we compare the performance and power efficiency of Unified Parallel C (UPC), MPI and OpenMP by running a set of kernels from the NAS Benchmark. One of the goals of this study is to focus on the Partitioned Global Address Space (PGAS) model, in order to describe it and compare it to MPI and OpenMP. In particular we consider the power effi- ciency expressed in millions operations ...

    • Investigating the security issues surrounding usage of Ephemeral data within Android environments 

      Høgset, Erlend Skog (Master thesis; Mastergradsoppgave, 2015-08-27)
      With mobile devices managing more and more of our personal data, for many it has become a ubiquitous resource. This is also true in the workplace where they are instituting Bring Your Own Device practices. While this saves the enterprise money in terms of equipment, it also increases the diversity of devices brought to work. This presents security problems as corporate data received and transmitted ...

    • Co-cultivation and transcriptome sequencing of two co-existing fish pathogens Moritella viscosa and Aliivibrio wodanis 

      Hjerde, Erik; Karlsen, Christian; Sørum, Henning; Parkhill, Julian; Willassen, Nils Peder; Thomson, Nicholas R. (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-06-10)
      Background: Aliivibrio wodanis and Moritella viscosa have often been isolated concurrently from fish with winterulcer disease. Little is known about the interaction between the two bacterial species and how the presence of one bacterial species affects the behaviour of the other. Results: The impact on bacterial growth in co-culture was investigated in vitro, and the presence of A. wodanis has an ...

    • Effects of mortality changes on biomass and production in Calanus spp. populations 

      Skardhamar, Jofrid; Reigstad, Marit; Carroll, Jolynn; Eiane, Ketil; Wexels Riser, Christian; Slagstad, Dag (Journal article; Tidsskriftartikkel; Peer reviewed, 2011-04-28)
      Calanus species are the main link between primary producers and higher trophic-level organisms in the Barents Sea. The natural mortality rate is an essential parameter for determining the standing stock of Calanus, but it is also one of the most uncertain parameters in present knowledge. The level of human activity, and the associated risk of pollution, is increasing in the Barents Sea, and knowledge ...

    • Some combinatorial invariants determined by Betti numbers of Stanley-Reisner ideals 

      Roksvold, Jan Nyquist (Doctoral thesis; Doktorgradsavhandling, 2015-09-08)
      The thesis contains new results on the connection between the algebraic properties of certain ideals of a polynomial ring and properties of error-correcting linear codes, matroids and simplicial complexes. We demonstrate that the graded Betti numbers of the facet ideal of a matroid are determined by the Betti numbers of the blocks of the matroid. The extended weight enumerator of coding theory is ...

    • Land sokkel korrelasjon av sprø mesozoiske og paleozoiske forkastninger i et profil over Vestfjordbassenget, Vestvågøya og Ribbebassenget. 

      Lundekvam, Petter Andreas (Master thesis; Mastergradsoppgave, 2015-08-19)
      Denne studien har studert geomorfologi og sprø forkastninger i et profil som strekker seg fra Vestfjordbassenget, over Vestvågøya/Lofotryggen og Ribbebassenget. Det flate slettelandskapet sentralt på Vestvågøya skiller seg ut fra landskapet ellers i Lofoten, som stor sett består av alpint fjellandskap. Slettelandskapet er omgitt av alpine asymmetriske fjell langs kysten i NØ og NV. Fjellenes brattside ...