Now showing items 2264-2283 of 4765

    • Krisekommunikasjon i Troms politidistrikt. En studie av skredulykken i Tamokdalen. 

      Skimelid, Arnold (Master thesis; Mastergradsoppgave, 2019-05-31)
      Denne studien belyser krisehåndteringen i Troms politidistrikt underveis og i etterkant av den tragiske skredulykken 2. januar 2019 ved Blåbærtinden i Tamokdalen. Fire utenlandske skiturister omkom i snøskredet. Slike ulykker kan føre til kritikk mot myndighetene både underveis og i etterkant. For politiet var dette en krevende operasjon. De hadde ansvaret både for redningsaksjonen og krisekommunikasjonen ...
    • Kriseledelse. En litteraturstudie i kriseledelse sin beslutningstaking under usikkerhet 

      Medina-Torskanger, Victoria (Master thesis; Mastergradsoppgave, 2021-05-31)
      Med et stadig økende risikobilde ser man også at usikkerheten vokser seg større i kriser som oppstår. Usikkerhet setter dermed en føring for hvordan krisehåndteringen gjennomføres. Usikkerhet kan i verste fall føre til tap av menneskeliv om den ikke håndteres riktig. Det er derfor viktig at kriseledelsen og ansvarlige beredskapsaktører har nødvendig forståelse og kompetanse for å håndtere og takle ...
    • Kunnskapsoverføring i beredskapsorganisasjoner i Longyeabyen, Svalbard - En kvalitativ studie av forvaltningen av taus kunnskap i beredskapsorganisasjoner preget av høy turnover 

      Haugvoll, Martine (Master thesis; Mastergradsoppgave, 2023-07-13)
      Svalbard er et lite arktisk øysamfunn som betegnes som et rotasjonssamfunn. Høy turnover av ansatte i Longyearbyens beredskapsorganisasjoner har gjentatte ganger blitt fremhevet som en utfordring for erfarings- og kunnskapsoverføring (DSB, 2016), og for kontinuiteten i arbeidet med samfunnssikkerhet- og beredskap. Etter det fatale snøskredet i 2015 ble etablering av en systematikk som ivaretar ...
    • Kvasir-SEG: A Segmented Polyp Dataset 

      Jha, Debesh; Pia H, Smedsrud; Riegler, Michael; Halvorsen, Pål; de Lange, Thomas; Johansen, Dag; Johansen, Håvard D. (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-01-24)
      Pixel-wise image segmentation is a highly demanding task in medical-image analysis. In practice, it is difficult to find annotated medical images with corresponding segmentation masks. In this paper, we present Kvasir-SEG: an open-access dataset of gastrointestinal polyp images and corresponding segmentation masks, manually annotated by a medical doctor and then verified by an experienced ...
    • Kvik : interactive exploration of genomic data from the NOWAC postgenome biobank 

      Fjukstad, Bjørn (Master thesis; Mastergradsoppgave, 2014-05-15)
      Recent technological advances provide large amounts of data for epidemiological analyses that can provide novel insights in the dynamics of carcinogenesis. These analyses are often performed without prior hypothesis and therefore require an exploratory approach. Realizing exploratory analysis requires the development of new systems that provide interactive exploration and visualization of large-scale ...
    • Kvik: three-tier data exploration tools for flexible analysis of genomic data in epidemiological studies 

      Fjukstad, Bjørn; Olsen, Karina Standahl; Jareid, Mie; Lund, Eiliv; Bongo, Lars Ailo (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-03-30)
      Kvik is an open-source system that we developed for explorative analysis of functional genomics data from large epidemiological studies. Creating such studies requires a significant amount of time and resources. It is therefore usual to reuse the data from one study for several research projects. Often each project requires implementing new analysis code, integration with specific knowledge bases, ...
    • Kvik: three-tier data exploration tools for flexible analysis of genomic data in epidemiological studies [version 1; peer review: 2 approved with reservations] 

      Fjukstad, Bjørn; Olsen, Karina Standahl; Jareid, Mie; Lund, Eiliv; Bongo, Lars Ailo (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-03-30)
      Kvik is an open-source system that we developed for explorative analysis of functional genomics data from large epidemiological studies. Creating such studies requires a significant amount of time and resources. It is therefore usual to reuse the data from one study for several research projects. Often each project requires implementing new analysis code, integration with specific knowledge bases, ...
    • Kystfiske - Sikkerhet uten forankring? 

      Storli, Marius (Master thesis; Mastergradsoppgave, 2022-06-01)
      Jeg ønsket å forske nærmere på hvordan sikkerhetskulturen er hos fiskerne og hvilke faktorer som påvirker dem. Formålet er å finne ut om det er manglende fokus på sikkerhet og dårlig sikkerhetskultur som er årsaken til at antall ulykker ikke går ned. Fiske og fangst har til alle tider vært grunnlaget for arbeid og bosetting langs kysten. (fiskeridepartementet, 2021) For de som sitter på land og ...
    • Label-free imaging on waveguide platform with enhanced resolution and contrast 

      Jayakumar, Nikhil; Dullo, Firehun Tsige; Dubey, Vishesh Kumar; Ahmad, Azeem; Cauzzo, Jennifer; Mazagao Guerreiro, Eduarda; Snir, Omri; Skalko-Basnet, Natasa; Agarwal, Krishna; Ahluwalia, Balpreet Singh (Conference object; Konferansebidrag, 2021)
      Chip-based Evanescent Light Scattering (cELS) utilizes the multiple modes of a high-index contrast optical waveguide for near-field illumination of unlabeled samples, thereby repositioning the highest spatial frequencies of the sample into the far-field. The multiple modes scattering off the sample with different phase differences is engineered to have random spatial distributions within the integration ...
    • Label-free measurement of antimicrobial peptide interactions with lipid vesicles and nanodiscs using microscale thermophoresis 

      Rainsford, Philip; Rylandsholm, Fredrik G.; Jakubec, Martin; Silk, Mitchell; Juskewitz, Eric; Ericson, Johanna U; Svendsen, John Sigurd Mjøen; Engh, Richard Alan; Isaksson, Johan Mattias (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-08-03)
      One strategy to combat antimicrobial resistance is the discovery of new classes of antibiotics. Most antibiotics will at some point interact with the bacterial membrane to either interfere with its integrity or to cross it. Reliable and efficient tools for determining the dissociation constant for membrane binding (K<sub>D</sub>) and the partitioning coefficient between the aqueous- and membrane ...
    • Label-free measurement of antimicrobial peptide interactions with lipid vesicles and nanodiscs using microscale thermophoresis 

      Rainsford, Philip Ben; Rylandsholm, Fredrik G.; Jakubec, Martin; Silk, Mitchell; Juskewitz, Eric; Ericson, Johanna Ulrica; Svendsen, John Sigurd Mjøen; Engh, Richard Alan; Isaksson, Johan Mattias (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-08-03)
      One strategy to combat antimicrobial resistance is the discovery of new classes of antibiotics. Most antibiotics will at some point interact with the bacterial membrane to either interfere with its integrity or to cross it. Reliable and efficient tools for determining the dissociation constant for membrane binding (K<sub><i>D</sub></i>) and the partitioning coefficient between the aqueous- and ...
    • Label-free nanoscopy enabled by coherent imaging with photonic waveguides 

      Ströhl, Florian; Opstad, Ida Sundvor; Tinguely, Jean-Claude; Dullo, Firehun Tsige; Kaminski, Clemens F.; Ahluwalia, Balpreet Singh (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-07-29)
      In this project it was found that Fourier ptychographic microscopy can be improved far beyond its conventional limits via waveguide-based optical systems. Extensive in silico studies showed that images obtained on highrefractive index material waveguide chips in conjunction with hyperspectral illumination light and finely designed waveguide geometries can be combined via a modified phase-retrieval ...
    • Label-free non-invasive classification of rice seeds using optical coherence tomography assisted with deep neural network 

      Joshi, Deepa; Butola, Ankit; Kanade, Sheetal Raosaheb; Prasad, Dilip K.; Amitha Mithra, Mithra; Singh, N.K.; Bisht, Deepak Singh; Mehta, Dalip Singh (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-01)
      Identification of the seed varieties is essential in the quality control and high yield crop growth. The existing methods of varietal identification rely primarily on visual examination and DNA fingerprinting. Although the pattern of DNA fingerprinting allows precise classification of seed varieties but fraught with challenges such as low rate of polymorphism amongst closely related species, destructive ...
    • Label-free super-resolution optical microscopy 

      Jayakumar, Nikhil (Doctoral thesis; Doktorgradsavhandling, 2024-02-06)
      To see structures well below 200 nm using visible light, super-resolution techniques have been developed. Most of these techniques rely on fluorescence labelling or use of artificial materials to go beyond the Abbe limit. Therefore, achieving super-resolution in the label-free regime is the problem that is being addressed in this thesis. In this work, high-index contrast dielectric waveguides are ...
    • Label-free superior contrast with c-band ultra-violet extinction microscopy 

      Wolfson, Deanna; Opstad, Ida Sundvor; Hansen, Daniel Henry; Mao, Hong; Ahluwalia, Balpreet Singh; Ströhl, Florian (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-03-03)
      In 1934, Frits Zernike demonstrated that it is possible to exploit the sample’s refractive index to obtain superior contrast images of biological cells. The refractive index contrast of a cell surrounded by media yields a change in the phase and intensity of the transmitted light wave. This change can be due to either scattering or absorption caused by the sample. Most cells are transparent at visible ...
    • Labilibaculum manganireducens gen. nov., sp. nov. and Labilibaculum filiforme sp. nov., Novel Bacteroidetes Isolated from Subsurface Sediments of the Baltic Sea 

      Vandieken, Verona; Marshall, Ian P.G.; Niemann, Helge; Engelen, Bert; Cypionka, Heribert (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-01-05)
      Microbial communities in deep subsurface sediments are challenged by the decrease in amount and quality of organic substrates with depth. In sediments of the Baltic Sea, they might additionally have to cope with an increase in salinity from ions that have diffused downward from the overlying water during the last 9000 years. Here, we report the isolation and characterization of four novel bacteria ...
    • Lactoferricin-inspired peptide AMC-109 augments the effect of ciprofloxacin against Pseudomonas aeruginosa biofilm in chronic murine wounds 

      Laulund, Anne Sofie; Schwartz, Franziska Angelika; Christophersen, Lars; Høiby, Niels; Svendsen, John Sigurd Mjøen; Stensen, Wenche Gunvor Berg; Thomsen, Kim; Cavanagh, Jorunn Pauline; Moser, Claus (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-12-23)
      Objectives: Chronic wounds are characterised by prolonged inflammation, low mitogenic activity, high protease/low inhibitor activity, microbiota changes and biofilm formation, combined with the aetiology of the original insult. One strategy to promote healing is to terminate the parasitism-like relationship between the biofilm-growing pathogen and host response. Antimicrobial peptide AMC-109 is a ...
    • A Lagrangian Snow Evolution System for Sea Ice Applications (SnowModel‐LG): Part II - Analyses 

      Stroeve, Julienne C.; Liston, Glen E.; Buzzard, Samantha; Zhou, Lu; Mallett, Robbie; Barrett, Andrew; Tschudi, Mark; Tsamados, Michel; Itkin, Polona; Stewart, Scott (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-02)
      Sea ice thickness is a critical variable, both as a climate indicator and for forecasting sea ice conditions on seasonal and longer time scales. The lack of snow depth and density information is a major source of uncertainty in current thickness retrievals from laser and radar altimetry. In response to this data gap, a new Lagrangian snow evolution model (SnowModel‐LG) was developed to simulate snow ...
    • A Lagrangian Snow‐Evolution System for Sea‐Ice Applications (SnowModel‐LG): Part I – Model Description 

      Liston, Glen E.; Itkin, Polona; Stroeve, Julienne C.; Tschudi, Mark; Stewart, J. Scott; Pedersen, Stine Højlund; Reinking, A.K.; Elder, Kelly (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-08-06)
      A Lagrangian snow-evolution model (SnowModel-LG) was used to produce daily, pan-Arctic, snow-on-sea-ice, snow property distributions on a 25 × 25-km grid, from 1 August 1980 through 31 July 2018 (38 years). The model was forced with NASA's Modern Era Retrospective-Analysis for Research and Applications-Version 2 (MERRA-2) and European Centre for Medium-Range Weather Forecasts (ECMWF) ReAnalysis-5th ...
    • Lake Sedimentary DNA Research on Past Terrestrial and Aquatic Biodiversity: Overview and Recommendations 

      Capo, Eric; Giguet-Covex, Charline; Rouillard, Alexandra; Nota, Kevin; Heintzman, Peter D.; Vuillemin, Aurèle; Ariztegui, Daniel; Arnaud, Fabien; Belle, Simon; Bertilsson, Stefan; Bigler, Christian; Bindler, Richard; Brown, Antony G.; Clarke, Charlotte L.; Crump, Sarah E.; Debroas, Didier; Englund, Göran; Ficetola, Gentile Francesco; Garner, Rebecca E.; Gauthier, Joanna; Gregory-Eaves, Irene; Heinecke, Liv; Herzschuh, Ulrike; Ibrahim, Anan; Kisand, Veljo; Kjær, Kurt H.; Lammers, Youri; Littlefair, Joanne; Messager, Erwan; Monchamp, Marie-Eve; Olajos, Fredrik; Orsi, William; Pedersen, Mikkel W.; Rijal, Dilli P.; Rydberg, Johan; Spanbauer, Trisha; Stoof-Leichsenring, Kathleen R.; Taberlet, Pierre; Talas, Liisi; Thomas, Camille; Walsh, David A.; Wang, Yucheng; Willerslev, Eske; van Woerkom, Anne; Zimmermann, Heike H.; Coolen, Marco J. L.; Epp, Laura S.; Domaizon, Isabelle; Alsos, Inger G.; Parducci, Laura (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-13)
      The use of lake sedimentary DNA to track the long-term changes in both terrestrial and aquatic biota is a rapidly advancing field in paleoecological research. Although largely applied nowadays, knowledge gaps remain in this field and there is therefore still research to be conducted to ensure the reliability of the sedimentary DNA signal. Building on the most recent literature and seven original ...