Viser treff 16461-16480 av 36502

    • Hyperspectral imaging for the detection of glioblastoma tumor cells in H&E slides using convolution neural networks 

      Ortega, S.; Halicek, M.; Fabelo, H.; Camacho, R.S.; Plaza, M.L.; Godtliebsen, Fred; Callico, G. M.; Fei, Baowei (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-03-30)
      Hyperspectral imaging (HSI) technology has demonstrated potential to provide useful information about the chemical composition of tissue and its morphological features in a single image modality. Deep learning (DL) techniques have demonstrated the ability of automatic feature extraction from data for a successful classification. In this study, we exploit HSI and DL for the automatic differentiation ...
    • Mathematical modelling of bioenergy systems for stability analysis and parametric sensitivity 

      Das, Subhashis (Doctoral thesis; Doktorgradsavhandling, 2021-03-19)
      <p>This thesis presents a research study on bioreactor design and biochemical processes for conversion of biomass into bioenergy and develops mathematical models that can be used for designing better reactors and control systems. Good design of the bioreactors and understanding of the biochemical process is essential to control the process for maximizing the yield. Improving the performance efficiency ...
    • Pricing strategies of airline companies. Discovering the reasons behind ticket price variation on Norwegian airline market. 

      Grabovskaia, Sofiia (Master thesis; Mastergradsoppgave, 2020-12-01)
      Price of good or service is to some extent a reflection of company’s underlying strategies. On the airline market, price is determined by various factors such as type of carrier, season, flight and fare characteristics, as well as goals and visions of the specific airline company. This thesis contains an empirical analysis of pricing strategies of airline companies on domestic market in Norway. ...
    • Fibroblast in vitro stimulation with TGFβ1 and bFGF; αSMA expression and S100A4 immunohistochemistry staining in oral cancer 

      Alexopoulou, Eirini (Master thesis; Mastergradsoppgave, 2020-12-16)
      Oral squamous cell carcinoma (OSCC) is an aggressive cancer associated with high mortality rates. The objective of this master project was to test the following hypotheses: (1) transforming growth factor β1 (TGFβ1) activates fibroblasts in vitro and basic fibroblast growth factor (bFGF) deactivates them while both increase fibroblast proliferation in cancer associated fibroblasts (CAFs); (2) the ...
    • Late Pleistocene-Holocene history of Svalbard ice caps and glaciers – integrating marine, terrestrial and lacustrine archives 

      Allaart, Lis (Doctoral thesis; Doktorgradsavhandling, 2021-03-25)
      The Arctic regions are affected by the modern climate change to a greater extent than the global average. This effect is called the Arctic amplification and is reflected in air temperatures rising with double rate and increased precipitation compared to the global average. The climate of Svalbard is strongly related to variations in the atmospheric and oceanic circulation patterns, and the archipelago ...
    • A biomarker approach to explain high cardiovascular disease burden in Russia: insights from population-based studies in Russia and Norway 

      Iakunchykova, Olena (Doctoral thesis; Doktorgradsavhandling, 2021-03-25)
      Although the problem of cardiovascular disease (CVD) in Russia has been the subject of attention for decades, a definitive and comprehensive explanation of why the CVD burden there is so high and generally greater than in many other countries has still not been found. In this thesis, I have attempted to advance research on these issues by examining the role of blood lipids, heart damage biomarkers ...
    • Seafloor deposition of water-based drill cuttings generates distinctive and lengthy sediment bacterial community changes 

      Nguyen, Tan Thi; Paulsen, John E.; Landfald, Bjarne (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-27)
      The spatial extent and persistence of bacterial change caused by deposition of water-based drill cuttings on the seafloor were explored by a community-wide approach. Ten centimeter sediment cores were sampled along transects extending from ≤15 m to 250 m from three nearby drilling sites in the southern Barents Sea. Eight months, 8 years and 15 years, respectively, had passed since the completion of ...
    • Common social determinants for overweight and obesity, and dental caries among adolescents in Northern Norway: a cross-sectional study from the Tromsø Study Fit Futures cohort 

      Stangvaltaite-Mouhat, Lina; Furberg, Anne-Sofie; Drachev, Sergei Nikolaevich; Trovik, Tordis A (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-05)
      <i>Background</i> - Non-communicable general and oral health conditions share common risk factors. Studies investigating common social determinants as risk factors for overweight/obesity and dental caries among the same adolescents are scarce and inconclusive.<p><p> <i>Methods</i> - This cross-sectional study included data from 464 girls and 494 boys from the population-based Tromsø study Fit ...
    • Conjugate Heat Transfer Model Based on SIMPLE and Coupled Energy and Heat Equations 

      Leyli, Amir Nadem; Andleeb, Zahra; Khawaja, Hassan; Messahel, Ramzi; Kanna, Rajesh; Moatamedi, Mojtaba (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-01-28)
      In this study, a numerical weak coupling strategy for the modeling of a conjugate heat transfer phenomenon is considered. Where the incompressible Navier-Stokes equations are solved using the Semi-Implicit Method for Pressure Linked Equations (SIMPLE) as a first step, and then the heat conduction equation for solid is solved in a second step considering the convective velocity field resulting from ...
    • A Holistic Perspective: Exosomes Shuttle between Nerves and Immune Cells in the Tumor Microenvironment 

      Dragomir, Mihnea Paul; Moisoiu, Vlad; Manaila, Roxana; Pardini, Barbara; Knutsen, Erik; Anfossi, Simone; Amit, Moran; Calin, George A. (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-10-31)
      One of the limitations of cancer research has been the restricted focus on tumor cells and the omission of other non-malignant cells that are constitutive elements of this systemic disease. Current research is focused on the bidirectional communication between tumor cells and other components of the tumor microenvironment (TME), such as immune and endothelial cells, and nerves. A major success of ...
    • Leaky severe combined immunodeficiency in mice lacking non-homologous end joining factors XLF and MRI 

      Castaneda Zegarra, Sergio Miguel; Zhang, Qindong; Alirezaylavasani, Amin; Fernandez-Berrocal, Marion Silvana; Yao, Rouan; Oksenych, Valentyn (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-12-07)
      Non-homologous end-joining (NHEJ) is a DNA repair pathway required to detect, process, and ligate DNA double-stranded breaks (DSBs) throughout the cell cycle. The NHEJ pathway is necessary for V(D)J recombination in developing B and T lymphocytes. During NHEJ, Ku70 and Ku80 form a heterodimer that recognizes DSBs and promotes recruitment and function of downstream factors PAXX, MRI, DNA-PKcs, Artemis, ...
    • Current Status of Circulating Tumor Cells, Circulating Tumor DNA, and Exosomes in Breast Cancer Liquid Biopsies 

      Tellez Gabriel, Marta; Knutsen, Erik; Perander, Maria (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-12-11)
      Breast cancer is the most common cancer among women worldwide. Although the five-, ten- and fifteen-year survival rates are good for breast cancer patients diagnosed with early-stage disease, some cancers recur many years after completion of primary therapy. Tumor heterogeneity and clonal evolution may lead to distant metastasis and therapy resistance, which are the main causes of breast cancer-associated ...
    • The value of dynamic infrared thermography in pedicled thoracodorsal artery perforator flap surgery 

      Sjöberg, Thomas K.; Mercer, James; Weum, Sven; de Weerd, Louis (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-15)
      <p><i>Background:</i> Dynamic infrared thermography (DIRT) is a noninvasive imaging technique that can provide indirect and real-time information on skin perfusion by measuring skin temperature. Although used in flap surgery, there are no reports on its value in procedures using a pedicled thoracodorsal artery perforator (TDAP) flap. The aim of this study was to assess the usefulness of DIRT in ...
    • Factors Engaging Users of Diabetes Social Media Channels on Facebook, Twitter, and Instagram: Observational Study 

      Gabarron, Elia; Larbi, Dillys; Dorronzoro, Enrique; Hasvold, Per Erlend; Wynn, Rolf; Årsand, Eirik (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-29)
      <p><i>Background:</i> Diabetes patient associations and diabetes-specific patient groups around the world are present on social media. Although active participation and engagement in these diabetes social media groups has been mostly linked to positive effects, very little is known about the content that is shared on these channels or the post features that engage their users the most. <p><i>Objective:</i> ...
    • Stroke-Specific Quality of Life one-year post-stroke in two Scandinavian country-regions with different organisation of rehabilitation services: a prospective study 

      Pedersen, Synne Garder; Friborg, Oddgeir; Heiberg, Guri Anita; Arntzen, Cathrine; Holm Stabel, Henriette; Thrane, Gyrd; Nielsen, Jørgen Feldbæk; Anke, Audny (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-05-01)
      <p><i>Purpose:</i> To compare stroke-specific health related quality of life in two country-regions with organisational differences in subacute rehabilitation services, and to reveal whether organisational factors or individual factors impact outcome. <p><i>Materials and methods:</i> A prospective multicentre study with one-year follow-up of 369 first-ever stroke survivors with ischaemic or ...
    • Teltliv i Grønlands steinalder. Romlig analyse av steinartefakter på Saqqaqboplasser 

      Mikalsen, Tor (Master thesis; Mastergradsoppgave, 2001-02-17)
      <p>Oppgaven benytter romlig plassering av steinartefakter til å belyse bruken av boliger i Vest-Grønland i perioden 2400-1500 f.kr. Tidligere arbeider fra området har i hovedsak kvantifisert artefakter og analysert redskapstyper, og fra dette utledet kronologier og hvilke arbeidsoppgaver redskapene har inngått i. I denne oppgaven brukes til en viss grad redskapsanalyser og kvantitative analyser, men ...
    • Dangerous Food. Climate change induced elevated heavy metal levels in Younger Stone Age seafood in northern Norway. 

      Blankholm, Hans Peter; Lidén, Kerstin; Kovaevic, Nikola; Angerbjörn, Karin (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-01-28)
      Stable isotope and elemental analyses of the Atlantic cod (<i>Gadus morhua</i>) and harp seal (<i>Phoca groenlandica</i>) bone component of the marine food that dominated the Younger Stone Age (c. 6.1–3.5 ka BP) diet in Varanger, Arctic northern Norway, indicate, at times, climate change induced highly elevated levels of the heavy metals cadmium (Cd) and lead (Pb), and elevated levels of mercury ...
    • High-latitude crochet: Solar-flare-induced magnetic disturbance independent from low-latitude crochet 

      Yamauchi, Masatoshi; Johnsen, Magnar Gullikstad; Enell, Carl-Fredrik; Tjulin, Anders; Willer, Anna; Sormakov, Dmitry A. (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-11-03)
      A solar-flare-induced, high-latitude (peak at 70–75<sup>∘</sup> geographic latitude – GGlat) ionospheric current system was studied. Right after the X9.3 flare on 6 September 2017, magnetic stations at 68–77<sup>∘</sup> GGlat near local noon detected northward geomagnetic deviations (ΔB) for more than 3 h, with peak amplitudes of >200 nT without any accompanying substorm activities. From its location, ...
    • Introduction: Symposium on Acceptable and Unacceptable Criteria for Prioritizing Among Refugees in a Nonideal World 

      Vitikainen, Annamari; Lippert-Rasmussen, Kasper (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-12-11)
      All persons have a right to seek and find asylum. Arguably, the international community, or the states that comprise it, have a duty to provide such asylum. In the present circumstances, such rights of refugees, or the duties of the receiving states, are not always fulfilled. Not everyone is able to seek, let alone find, asylum, and many refugees, all deserving of asylum, are left unprotected, ...
    • "We belong to nature": Communicating Mental Health in an Indigenous Context 

      Sørly, Rita; Mathisen, Vår; Kvernmo, Siv (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-23)
      The approach to standardized services in Norwegian mental health care is tailored to the needs of the majority population, focusing on diagnoses and overshadows an approach that understands, values and emphasizes Sámi storytelling and everyday life. This study aims to contribute knowledge regarding the promotion of user involvement in mental health care from the perspectives of Sámi mental health ...