Viser treff 791-810 av 4753

    • Cross-population evaluation of cervical cancer risk prediction algorithms 

      Elvatun, Severin; Knoors, Daan; Nygård, Mari Kiens; Uusküla, Anneli; Võrk, Andres; Nygård, Jan Franz (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-24)
      Background - Cervical cancer is a preventable disease, despite being one of the most common types of female cancers worldwide. Integrating existing programs for cervical cancer screening with personalized risk prediction algorithms can improve population-level cancer prevention by enabling more targeted screening and contrive preventive healthcare innovations. While algorithms developed for cervical ...
    • The Cruise Industry and the Polar Code. Implementing the Polar Code. 

      Kristiansen, Bendik Skoglund (Master thesis; Mastergradsoppgave, 2019-05-31)
      The mandatory Polar Code is now set into force with strengthened requirements for vessels operating in polar waters. There are many challenges, and the polar environment adds an increased risk level. The preventive actions towards mitigating risks are more important due to the harsh environment, long distances and limited options for assistant rescue. Most accidents and incidents have pre-occurring ...
    • Crustal processes sustain Arctic abiotic gas hydrate and fluid flow systems 

      Waghorn, Kate Alyse; Vadakkepuliyambatta, Sunil; Plaza-Faverola, Andreia; Johnson, Joel E; Bünz, Stefan; Waage, Malin (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-30)
      The Svyatogor Ridge and surroundings, located on the sediment-covered western flank of the Northern Knipovich Ridge, host extensive gas hydrate and related fluid flow systems. The fluid flow system here manifests in the upper sedimentary sequence as gas hydrates and free gas, indicated by bottom simulating reflections (BSRs) and amplitude anomalies. Using 2D seismic lines and bathymetric data, we ...
    • CryoSat-2 Significant Wave Height in Polar Oceans Derived Using a Semi-Analytical Model of Synthetic Aperture Radar 2011–2019 

      Heorten, Harold; Tsamados, Michel; Armitage, Thomas; Ridout, Andy; Landy, Jack Christopher (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-10-18)
      This paper documents the retrieval of significant ocean surface wave heights in the Arctic Ocean from CryoSat-2 data. We use a semi-analytical model for an idealised synthetic aperture satellite radar or pulse-limited radar altimeter echo power. We develop a processing methodology that specifically considers both the Synthetic Aperture and Pulse Limited modes of the radar that change close to ...
    • Cryosphere-controlled methane release throughout the last glacial cycle 

      Serov, Pavel (Doctoral thesis; Doktorgradsavhandling, 2018-12-04)
      <p>The cryosphere of Arctic regions is undergoing rapid change due to century-scale global warming superimposed on millennial-scale natural climatic perturbations that started at the end of the last glacial cycle approximately 20,000 years ago [Slaymaker and Kelly, 2009]. The cryosphere refers to areas where low temperatures freeze water and form ice in the ocean (sea ice), on land (glaciers, ...
    • Cryptic frenulates are the dominant chemosymbiotrophic fauna at Arctic and high latitude Atlantic cold seeps 

      Sen, Arunima; Duperron, Sebastien; Hourdez, Stephane; Piquet, Berenice; Léger, Nelly; Gebruk, Andrey; Le Port, Anne-Sophie; Svenning, Mette Marianne; Andersen, Ann C. (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-12-28)
      We provide the first detailed identification of Barents Sea cold seep frenulate hosts and their symbionts. Mitochondrial COI sequence analysis, in combination with detailed morphological investigations through both light and electron microscopy was used for identifying frenulate hosts, and comparing them to Oligobrachia haakonmosbiensis and Oligobrachia webbi, two morphologically similar species ...
    • Cryptic β-Lactamase Evolution Is Driven by Low β-Lactam Concentrations 

      Fröhlich, Christopher; Gama, João Alves; Harms, Klaus; Hirvonen, Viivi H. A.; Lund, Bjarte Aarmo; van der Kamp, Marc W.; Johnsen, Pål Jarle; Samuelsen, Ørjan; Leiros, Hanna-Kirsti S. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-04-28)
      Our current understanding of how low antibiotic concentrations shape the evolution of contemporary β-lactamases is limited. Using the widespread carbapenemase OXA-48, we tested the long-standing hypothesis that selective compartments with low antibiotic concentrations cause standing genetic diversity that could act as a gateway to developing clinical resistance. Here, we subjected <i>Escherichia ...
    • Cryptophanes for Methane and Xenon Encapsulation: A Comparative Density Functional Theory Study of Binding Properties and NMR Chemical Shifts 

      Demissie, Taye Beyene; Ruud, Kenneth; Hansen, Jørn H. (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-11-27)
      The host-guest chemistry of cryptophanes is an active research area because of its applications in sensor design, targeting small molecules and atoms in environmental and medical sciences. As such, the computational prediction of binding energies and nuclear magnetic resonance (NMR) properties of different cryptophane complexes are of interest to both theoreticians and experimentalists ...
    • Crystal rotations and alignment in spatially varying magma flows: 2-D examples of common subvolcanic flow geometries 

      Vachon, Remi Elie Celestin; Bazargan, Mohsen; Hieronymus, Christoph F.; Ronchin, Erika; Almqvist, Bjarne (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-31)
      Elongate inclusions immersed in a viscous fluid generally rotate at a rate that is different from the local angular velocity of the flow. Often, a net alignment of the inclusions develops, and the resulting shape preferred orientation of the particle ensemble can then be used as a strain marker that allows reconstruction of the fluid’s velocity field. Much of the previous work on the dynamics of ...
    • Crystal Structure Evolution of Fluorine under High Pressure 

      Tantardini, Christian; Jalolov, Faridun N.; Kvashnin, Alexander G. (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07-01)
      Fluorinated compounds in the last decade were applied as photothermo-refractive glasses, high-stress lubricants, and pharmaceutical drugs due to their good mechanical properties and biocompatibility. Although fluorinated materials are largely employed, the possibility of predicting new structures was limited by the impossibility to use density functional theory (DFT) to describe interatomic ...
    • The crystal structure of haemoglobin from Atlantic cod 

      Helland, Ronny; Bjørkeng, Eva katrin; Rothweiler, Ulli; Sydnes, Magne Olav; Pampanin, Daniela Maria (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-07-16)
      The crystal structure of haemoglobin from Atlantic cod has been solved to 2.54 A˚ resolution. The structure consists of two tetramers in the crystallographic asymmetric unit. The structure of haemoglobin obtained from one individual cod suggests polymorphism in the tetrameric assembly.
    • Crystal structure of the DNA polymerase III β subunit (β-clamp) from the extremophile Deinococcus radiodurans 

      Niiranen, Laila; Lian, Kjersti; Johnson, Kenneth A; Moe, Elin (Journal article; Tidsskriftartikkel, 2015-02-27)
      Background: Deinococcus radiodurans is an extremely radiation and desiccation resistant bacterium which can tolerate radiation doses up to 5,000 Grays without losing viability. We are studying the role of DNA repair and replication proteins for this unusual phenotype by a structural biology approach. The DNA polymerase III β subunit (β-clamp) acts as a sliding clamp on DNA, promoting the binding ...
    • The crystal structure of the tetrameric DABA-aminotransferase EctB, a rate-limiting enzyme in the ectoine biosynthesis pathway 

      Hillier, Heidi Therese; Altermark, Bjørn; Leiros, Ingar (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-02-29)
      L‐2,4‐diaminobutyric acid (DABA) aminotransferases can catalyze the formation of amines at the distal ω‐position of substrates, and is the intial and rate‐limiting enzyme in the biosynthesis pathway of the cytoprotecting molecule (S)‐2‐methyl‐1,4,5,6‐tetrahydro‐4‐pyrimidine carboxylic acid (ectoine). Although there is an industrial interest in the biosynthesis of ectoine, the DABA aminotransferases ...
    • CSP at the Cyber-Physical Edge 

      Michalik, Lukasz Sergiusz; Murphy, Michael J.; Bjørndalen, John Markus; Anshus, Otto (Chapter; Bokkapittel, 2019)
      Today, to do ground-based in-situ observations of the arctic tundra, researchers carry wild life cameras and other observation units into the field, manually configure the devices while on the arctic tundra, and fetch the collected data several months later. This approach does not scale. Instead, observing and reporting of data must be automated using a distributed wireless network of autonomous ...
    • Culture Enhancement for Exergames for Individuals with Intellectual Disability 

      Dybwad, Dorthe (Mastergradsoppgave; Master thesis, 2023-06-01)
      Background: Individuals with intellectual disabilities (ID) often face barriers when trying to engage in physical activity. Exergames, which combine physical exercise with gaming technology, have shown the potential to promote physical activity among this group of individuals. However, the suitability of exergames for individuals with ID from different cultural backgrounds has received ...
    • The current status of environmental forensic science in the member institutes of the European Network of Forensic Science Institutes (ENFSI) 

      Mäkelä, Tuukka; Huhtala, Sami; Lindqvist, Mimmi A.; Bucht, Rebecca (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-02-04)
      The paper presents the results of a questionnaire survey carried out by The Forensic laboratory of the National Bureau of Investigation (NBI-FL), aiming to get an overview of the current status of environmental forensic science (EFS) and environmental crimes investigation in the European Network of Forensic Science Institutes (ENFSI). A questionnaire was sent out to 71 ENFSI member institutes and ...
    • Cybersikkerhetskultur – en studie av interne organisatoriske mekanismers påvirkning 

      Furøy, Christer Thomassen (Master thesis; Mastergradsoppgave, 2023-05-30)
      Som et av verdens mest digitaliserte land forvalter norske virksomheter store deler av sine verdier gjennom det digitale domenet. Digitalisering er viktig for både vekst og verdiskapning, men sikkerhetsutfordringene er også store, og de senere års nasjonale trusselvurderinger har hatt et økende fokus på den digitale trusselen. Derfor er cybersikkerhet som begrep blitt mer fremtredende de siste årene. ...
    • Cyberspace Effects on Civil Society. The Ultimate Game-Changer or Not? 

      Montalvan Castilla, Johana Evelyn; Pursiainen, Christer Henrik (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-10-04)
      The article studies the effects of the emergence of cyberspace, or digitization, on civil society, and develops an analytical framework to that effect. It is distinguished between four types of civil societies: apolitical, political, transnational, and uncivic. Each type of civil society is considered separately vis-à-vis cyberspace developments in order to understand what kind of civil society is ...
    • Cyclic Voltammetric Study of 2-Hydroxybenzophenone (HBP) Derivatives and the Correspondent Change in the Orbital Energy Levels in Different Solvents 

      Adeniyi, Adebayo A.; Ngake, Tankiso L.; Conradie, Jeanet (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-14)
      The experimental UV and CV of five substituted 2-hydroxybenzophenones in solvents acetonitrile, n-dimethylformamide and dimethylsulfoxide are presented. Results obtained were used to determine their experimental highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) and the results were compared to their theoretical model. The derivatives with an electron withdrawing ...
    • Cyclostratigraphic age constraining for Quaternary sediments in the Makarov Basin of the western Arctic Ocean using manganese variability 

      Park, Kwangkyu; Kim, Jung-Hyun; Asahi, Hirofumi; Polyak, Leonid; Khim, Boo-Keun; Schreck, Michael; Niessen, Frank; Kong, Gee Soo; Nam, Seung-Il (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-09-26)
      The Quaternary paleoenvironmental history of the Arctic Ocean remains uncertain, mainly due to the limited chronological constraints, especially beyond the 14C dating limits of accelerator mass spectrometry (AMS). The difficulty in establishing reliable chronostratigraphies is mainly attributed to low sedimentation rates and diagenetic sediment changes, resulting in very poor preservation of ...