Now showing items 15001-15020 of 36958

    • Multiscale and Multimodal Optical Imaging of the Ultrastructure of Human Liver Biopsies 

      Kong, Cihang; Bobe, Stefanie; Pilger, Christian; Lachetta, Mario; Øie, Cristina Ionica; Kirschnick, Nils; Mönkemöller, Viola; Hübner, Wolfgang; Förster, Christine; Schuttpelz, Mark; Kiefer, Friedemann; Huser, Thomas; Schulte am Esch, Jan (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-17)
      The liver as the largest organ in the human body is composed of a complex macroscopic and microscopic architecture that supports its indispensable function to maintain physiological homeostasis. Optical imaging of the human liver is particularly challenging because of the need to cover length scales across 7 orders of magnitude (from the centimeter scale to the nanometer scale) in order to fully ...
    • Auroral Image Processing Techniques - Machine Learning Classification and Multi-Viewpoint Analysis 

      Kvammen, Andreas (Doctoral thesis; Doktorgradsavhandling, 2021-09-30)
      Every year, millions of scientific images are acquired in order to study the auroral phenomena. The accumulated data contain a vast amount of untapped information that can be used in auroral science. Yet, auroral research has traditionally been focused on case studies, where one or a few auroral events have been investigated and explained in detail. Consequently, theories have often been developed ...
    • Convergence and completeness for square-well Stark resonant state expansions 

      Juhász, David; Kolesik, Miro; Jakobsen, Per (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-02)
      In this paper, we investigate the completeness of the Stark resonant states for a particle in a square-well potential. We find that the resonant state expansions for target functions converge inside the potential well and that the existence of this convergence does not depend on the depth of the potential well, <i>V</i><sub>0</sub>. By analyzing the asymptotic form of the terms in these expansions, ...
    • Constructing a partially transparent computational boundary for UPPE using leaky modes 

      Juhász, Dávid; Jakobsen, Per Kristen (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-08-19)
      In this paper, we introduce a method for creating a transparent computational boundary for the simulation of unidirectional propagation of optical beams and pulses using leaky modes. The key element of the method is the introduction of an artificial-index material outside a chosen computational domain and utilization of the quasi-normal modes associated with such artificial structure. The method is ...
    • Two Novel Lyso-Ornithine Lipids Isolated from an Arctic Marine Lacinutrix sp. Bacterium 

      Kristoffersen, Venke; Jenssen, Marte; Raid Jawad, Heba; Isaksson, Johan; Hansen, Espen; Rämä, Teppo; Østnes Hansen, Kine; Andersen, Jeanette Hammer (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-31)
      The Lacinutrix genus was discovered in 2005 and includes 12 Gram-negative bacterial species. To the best of our knowledge, the secondary metabolite production potential of this genus has not been explored before, and examination of Lacinutrix species may reveal novel chemistry. As part of a screening project of Arctic marine bacteria, the Lacinutrix sp. strain M09B143 was cultivated, extracted, ...
    • Agenda navigation in consultations covering multiple topics. A qualitative case study from general practice 

      Guassora, Ann Dorrit; Johansen, May-Lill; Malterud, Kirsti (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-26)
      Objective - To explore how agenda navigation may be accomplished underway in consultations covering multiple topics, we identified and analyzed one GP’s communicative strategies.<p> <p>Design, setting, and subjects - A qualitative observational case study with linguistic microanalysis of an exemplary consultation between a female patient with diabetes and her male GP. We used speech act theory ...
    • The prognostic effect of KRAS mutations in non-small cell lung carcinoma revisited: A norwegian multicentre study 

      Wahl, Sissel Gyrid Freim; Hong, Yan Dai; Emdal, Elisabeth Fritzke; Berg, Thomas; Halvorsen, Tarje Onsøien; Ottestad, Anine Larsen; Lund-Iversen, Marius; Brustugun, Odd; Førde, Dagny; Paulsen, Erna-Elise; Donnem, Tom; Andersen, Sigve; Grønberg, Bjørn Henning; Richardsen, Elin (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-26)
      Background: due to emerging therapeutics targeting KRAS G12C and previous reports with conflicting results regarding the prognostic impact of KRAS and KRAS G12C in non-small cell lung cancer (NSCLC), we aimed to investigate the frequency of KRAS mutations and their associations with clinical characteristics and outcome. Since mutation subtypes have different preferences for downstream pathways, we ...
    • Nonlinear optics 

      Juhász, Dávid (Doctoral thesis; Doktorgradsavhandling, 2021-09-24)
      Nonlinear light-matter interactions have been drawing attention of physicists since the 1960's. Quantum mechanics played a significant role in their description and helped to derive important formulas showing the dependence on the intensity of the electromagnetic field. High intensity light is able to generate second and third harmonics which translates to generation of electromagnetic field with ...
    • Powder fever and its impact on decision-making in avalanche terrain 

      Mannberg, Andrea; Hendrikx, Jordy; Johnson, Jerry; Hetland, Audun (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-09)
      We examined the effect of emotions, associated with “powder fever”, on decision-making in avalanche terrain. Background: Skiing in avalanche terrain is a voluntary activity that exposes the participant to potentially fatal risk. Impaired decision-making in this context can therefore have devastating results, often with limited prior corrective feedback and learning opportunities. Previous research ...
    • Dental caries in children and adolescents with juvenile idiopathic arthritis and controls: a multilevel analysis 

      Gil, Elisabeth G.; Åstrøm, Anne-Kristine N; Lie, Stein Atle; Rygg, Marite; Fischer, Johannes; Rosén, Annika; Bletsa, Athanasia; Luukko, Keijo; Shi, Xie-Qi; Halbig, Josefine; Frid, Paula; Cetrelli, Lena Elisabet; Tylleskär, Karin; Rosendahl, Karen; Skeie, Marit Slåttelid (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-25)
      Background - Optimal utilization of dental caries data is crucial in epidemiological research of individuals with juvenile idiopathic arthritis (JIA). The aims were to: explore whether caries is more prevalent among children and adolescents with JIA compared to controls; examine presence of caries according to JIA group, socio-behavioral and intraoral characteristics, and the extent to which ...
    • Exploring Klebsiella pneumoniae in Healthy Poultry Reveals High Genetic Diversity, Good Biofilm-Forming Abilities and Higher Prevalence in Turkeys Than Broilers 

      Franklin-Alming, Fiona; Kaspersen, Håkon; Hetland, Marit A. K.; Bakksjø, Ragna-Johanne; Nesse, Live L.; Leangapichart, Thongpan; Löhr, Iren Høyland; Telke, Amar; Sunde, Marianne (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-07)
      Klebsiella pneumoniae is a well-studied human pathogen for which antimicrobial resistant and hypervirulent clones have emerged globally. K. pneumoniae is also present in a variety of environmental niches, but currently there is a lack of knowledge on the occurrence and characteristics of K. pneumoniae from non-human sources. Certain environmental niches, e.g., animals, may be associated with high ...
    • Public Consultation on Proposed Revisions to Norway's Gene Technology Act: An Analysis of the Consultation Framing, Stakeholder Concerns, and the Integration of Non-Safety Considerations 

      Kjeldaas, Sigfrid; Antonsen, Trine; Hartley, Sarah; Myhr, Anne Ingeborg (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-07-08)
      In Norway, genetically modified organisms (GMOs) are regulated through the Gene Technology Act of 1993, which has received international attention for its inclusion of non-safety considerations. In 2017, the Norwegian Biotechnology Advisory Board triggered a process to revise the Act that included a public consultation and resulted in the “Proposal for relaxation.” Using poststructuralist discourse ...
    • Hva påvirker og forklarer individers vaner og fysisk aktivitet: mulige endringer underveis i Covid-19 perioden 

      Bottolfs, Andreas Halvorsen; Kruse, Marni (Master thesis; Mastergradsoppgave, 2021-06-07)
      Formålet med denne studien har vært å undersøke hva som påvirker fysisk aktivitet blant voksne. Som underordnet problemstilling har vi også kartlagt mulige endringer etter utbruddet av Covid-19. Situasjonen er slik at kun en av tre nordmenn oppfyller minimumskravet om fysisk aktivitet og forskning har antydet at Covid-19 har ført til en reduksjon i fysisk aktivitet. Dette koster samfunnet mye i form ...
    • Individual-Based Modeling of COVID-19 Vaccine Strategies 

      Skagseth, Håvard Mikal (Master thesis; Mastergradsoppgave, 2021-06-01)
      COVID-19 is a respiratory disease with influenza-like symptoms originating from Wuhan, China, towards the end of 2019. There has been developed multiple vaccines to contain the virus and to protect the most vulnerable people in society. In this thesis we look at two different vaccination strategies to prevent most deaths and years of life lost. We conclude that the safest and most consistent strategy ...
    • Geographical Variation of the Impact by the Covid-19 Pandemic in Norway. How much has the covid-19 pandemic affected excess mortality and excess decline in employment in Norway on a geographical level in 2020? 

      Hansen, Kristian (Master thesis; Mastergradsoppgave, 2021-05-31)
      This thesis investigates the geographical variation of excess mortality and excess decline in employment, during the covid-19 pandemic in Norway. The data were collected from Statistics Norway and The Norwegian Labour and Welfare Administration. The method tells you how much the present value are greater or lesser, compared to previous years. Excess mortality and decline in employment were ...
    • Seeking causal effects from a rule change. How did changing the “roughing the passer rule” in 2018 affect salaries for quarterbacks in the NFL? 

      Jakobsen, Thomas Tolla (Master thesis; Mastergradsoppgave, 2021-05-31)
      Following concerns for players safety, the National Football League (NFL) chose to protect the quarterbacks (QB) further by changing the “roughing the passer rule” in 2018. This paper studies the effect this rule change had on QB salaries. This is done by applying a Difference-in-Differences approach on salary data stretching from 2013 to 2021. Our estimate show how the salary increase following the ...
    • Hvordan kontroversiell merkeaktivisme påvirker forbrukeratferd 

      Hansen, Sigurd Birk; Lunde, Sigurd Andre Baustad (Master thesis; Mastergradsoppgave, 2021-05-30)
      Denne studien tar for seg sammenhengen mellom graden av kontrovers og forbrukeratferd innenfor en praksis som stadig øker i popularitet: Merkeaktivisme. Etter hvert som forbrukere forventer at bedrifter og merker tar mer samfunnsansvar, blir det enda viktigere å se på hvordan praksiser som merkeaktivisme gir utslag på forbrukeratferd. “Hvordan påvirker merkeaktivismens grad av kontrovers forbrukerens ...
    • Intensjon til å feriere i Norge - Betydningen holdninger, sosiale normer, ressurser og barrierer har for forbrukeren under en pandemi 

      Akerø, Carla Benedicte; Lund, Preben (Master thesis; Mastergradsoppgave, 2021-05-28)
      Formålet med denne oppgaven er å undersøke hva som påvirker intensjonen til å feriere i Norge. Dette gjøres ved å undersøke holdninger, sosiale normer og oppfattet atferdskontroll som inngår i det teoretiske rammeverket Theory of Planned Behaviour (Ajzen, 1991). Rammeverket er videre utvidet med variabler som kan bidra ytterligere til å forklare bakenforliggende aspekter ved holdning og oppfattet ...
    • The impact of Electricity insecurity on the performance of small and medium size enterprises-The case of Cameroon 

      Ef Ii, Pami-Pami (Master thesis; Mastergradsoppgave, 2021-05-28)
      Electricity is an important resource for an economy and its demand for the last decade have witness a significant increase. This work has as aim to study the impact of electricity insecurity on the performance of small and medium scale businesses in Cameroon within the period of 1980 to 2018. The study made use of time series data within the period of the study and uses two methodological approaches; ...
    • Relasjonskvaliteten i B2B relasjoner - effekten av kunders digitale kommunikasjonskompetanse 

      Engstad, Sara Emilie S.; Vikse, Kine S. (Master thesis; Mastergradsoppgave, 2021-05-31)
      Oppgavens formål er å undersøke hvordan relasjonskvaliteten i B2B relasjoner påvirkes av kunders digitale kommunikasjonskompetanse. Oppgaven skrives i det samme tidsrommet som COVID-19 pandemien pågår, og tar utgangspunkt i økt bruk av digital kommunikasjon som følge av pandemien. Det teoretiske rammeverket bygger på teorier fra tidligere studier av relasjonskvalitet, og inneholder dimensjoner av ...