Blar i tittel Fakultet for naturvitenskap og teknologi

Viser treff 4742-4753 av 4753

    • Year-around C- and L-band observation around the MOSAiC ice floe with high spatial and temporal resolution 

      Singha, Suman; Johansson, Malin; Spreen, Gunnar; Howell, Stephen; Shin-ichi, Sobue; Davidson, Malcolm (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-10-12)
      In September 2019, the German research icebreaker Polarstern started the largest multidisciplinary Arctic expedition, the MOSAiC (Multidisciplinary drifting Observatory for the Study of Arctic Climate) drift experiment. Being moored to ice floes at high Arctic for a whole year, thus including the winter season, the main goal of the expedition is to better understand and quantify relevant processes ...

    • A year-round satellite sea-ice thickness record from CryoSat-2 

      Landy, Jack Christopher; Dawson, Geoffrey; Tsamados, Michel; Bushuk, Mitchell; Stroeve, Julienne C.; Howell, Stephen; Krumpen, Thomas; Babb, David G.; Komarov, Alexander S.; Heorton, Harold; Belter, H. Jakob; Aksenov, Yevgeny (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-09-14)
      Arctic sea ice is diminishing with climate warming at a rate unmatched for at least 1,000 years. As the receding ice pack raises commercial interest in the Arctic, it has become more variable and mobile, which increases safety risks to maritime users. Satellite observations of sea-ice thickness are currently unavailable during the crucial melt period from May to September, when they would be most ...

    • You Just Keep on Pushing My Love over the Borderline: A Rejoinder 

      Simpson, Daniel; Rue, Håvard; Riebler, Andrea Ingeborg; Martins, Thiago Guerrera; Sørbye, Sigrunn Holbek (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-04-06)
      <i>INTRODUCTION</i>: The point of departure for our paper is that most modern statistical models are built to be flexible enough to model diverse data generating mechanisms. Good statistical practice requires us to limit this flexibility, which is typically controlled by a small number of parameters, to the amount “needed” to model the data at hand. The Bayesian framework provides a natural method ...

    • You learn as long as you drill; research synthesis from the Longyearbyen CO2 Laboratory, Svalbard, Norway 

      Olaussen, Snorre; Senger, Kim; Braathen, Alvar; Grundvåg, Sten-Andreas; Mørk, Atle (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-01-21)
      From 2007 to 2015, eight wells were drilled and fully cored to test the feasibility of storing CO<sub>2</sub> emitted from the coal-fueled power plant in Longyearbyen, Svalbard. The drilling campaign identified three water-bearing sandstone aquifers; i) a lower aquifer in Upper Triassic strata; ii) a middle aquifer in Upper Triassic to Middle Jurassic; and iii) an upper aquifer in Lower Cretaceous ...

    • Younger Dryas ice margin retreat in Greenland: new evidence from southwestern Greenland 

      Funder, Svend; Sørensen, Anita H. L.; Larsen, Nicolaj K.; Bjørk, Anders A.; Briner, Jason P.; Olsen, Jesper; Schomacker, Anders; Levy, Laura B.; Kjær, Kurt H. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-04)
      To date the final stage in deglaciation of the Greenland shelf, when a contiguous ice sheet margin on the inner shelf transitioned to outlet glaciers in troughs with intervening ice-free areas, we generated cosmogenic <sup>10</sup>Be dates from bedrock knobs on six outlying islands along a stretch of 300 km of the southwestern Greenland coast. Despite <sup>10</sup>Be inheritance influencing some ...

    • Younger Dryas ice margin retreat triggered by ocean surface warming in central-eastern Baffin Bay 

      Oksman, Mimmi; Weckström, Kaarina; Miettinen, Arto; Juggins, Stephen; Divine, Dmitry V; Jackson, Rebecca; Telford, Richard; Korsgaard, Niels J.; Kučera, Michal (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-10-18)
      The transition from the last ice age to the present-day interglacial was interrupted by the Younger Dryas (YD) cold period. While many studies exist on this climate event, only few include high-resolution marine records that span the YD. In order to better understand the interactions between ocean, atmosphere and ice sheet stability during the YD, more high-resolution proxy records from the Arctic, ...

    • ZeroComm: Decentralized, Secure and Trustful Group Communication 

      Witharanage, Yasiru Rathsara (Mastergradsoppgave; Master thesis, 2023-05-15)
      In the context of computer networks, decentralization is a network architecture that distributes both workload and control of a system among a set of coequal participants. Applications based on such networks enhance trust involved in communication by eliminating the external author- ities with self-interests, including governments and tech companies. The decentralized model delegates the ownership ...

    • Øvelse gjør mester? - Maktpyramide og trening i politiet 

      Solstad, Thomas (Master thesis; Mastergradsoppgave, 2021-07-01)
      Masteroppgaven stiller spørsmål om tjenestepersoner i politiet gis adekvate treningsmessige forutsetninger for å leve opp til krav og forventninger om at samfunnsoppdraget skal løses med minst mulig bruk av makt i tråd med prinsippene om nødvendighet, forsvarlighet og forholdsmessighet nedfelt i politiloven § 6. Studien er gjennomført som en kvantitativ spørreundersøkelse med mål å kartlegge ...

    • α-Synuclein fibril and synaptic vesicle interactions lead to vesicle destruction and increased lipid-associated fibril uptake into iPSC-derived neurons 

      Stephens, Amberley D.; Villegas, Ana Fernandez; Chung, Chyi Wei; Vanderpoorten, Oliver; Pinotsi, Dorothea; Mela, Ioanna; Ward, Edward; McCoy, Thomas M.; Cubitt, Robert; Routh, Alexander F.; Kaminski, Clemens F.; Kaminski Schierle, Gabriele S. (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-05-15)
      Monomeric alpha-synuclein (aSyn) is a well characterised protein that importantly binds to lipids. aSyn monomers assemble into amyloid fibrils which are localised to lipids and organelles in insoluble structures found in Parkinson’s disease patient’s brains. Previous work to address pathological aSyn-lipid interactions has focused on using synthetic lipid membranes, which lack the complexity of ...

    • β-Octabromo- and β-Octakis(trifluoromethyl)isocorroles: New Sterically Constrained Macrocyclic Ligands 

      Kolle, Ekaney Thomas; Beavers, Christine M.; Gagnon, Kevin J.; Ghosh, Abhik (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-05-26)
      Presented herein is a study of the acid-induced demetalation of two sterically hindered copper corroles, Cu b-octabromomeso-triphenylcorrole (Cu[Br8TPC]) and b-octakis(trifluoromethyl)-meso-tris(p-methoxyphenyl)corrole (Cu[(CF3 )8TpOMePC]). Unlike reductive demetalation, which affords the free-base boctabromocorrole, demetalation of Cu[Br8TPC] under nonreductive conditions (CHCl3 /H2SO4 ) ...

    • μPyCSP - Two approaches to implementing CSP-like concurrency modeling in microcontrollers. 

      Johansen, Jon Helge Langaas (Master thesis; Mastergradsoppgave, 2020-06-30)
      In this thesis, we have explored the possibility of bringing CSP-like concurrency modeling to an embedded environment. With the growth of IoT and embedded software, many of the hardships that come with concurrent coding in an inherently event-driven environment become more apparent. Convoluted and complex code is often used to handle the many fallacies of concurrency. We are solving this problem by ...

    • Телемедицина в Северной Норвегии: Уроки 25 лет развития 

      Hartvigsen, Gunnar; Pedersen, Steinar (Book; Bok, 2015)