Viser treff 1961-1980 av 5331

    • Privacy Perceptions and Concerns in Image-Based Dietary Assessment Systems: Questionnaire-Based Study 

      Sharma, Aakash; Czerwinska, Katja P; Brenna, Lars; Johansen, Dag; Johansen, Håvard D. (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-10-15)
      Background: Complying with individual privacy perceptions is essential when processing personal information for research. Our specific research area is performance development of elite athletes, wherein nutritional aspects are important. Before adopting new automated tools that capture such data, it is crucial to understand and address the privacy concerns of the research subjects that are to be ...
    • Anti-proliferative activity of a novel tricyclic triterpenoid acid from Commiphora africana resin against four human cancer cell lines 

      Isaksson, Johan; Rylandsholm, Fredrik G.; Bouř, Petr; Svendsen, John Sigurd Mjøen; Brichtová, Eva; Choi, Sng Un; Lee, Sang‑Ho; Jung, Young-Sik; No, Zae Sung; Aasen, Arne Jørgen; Dekebo, Aman; Dinku, Worku (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-03-17)
      Myrrh, a resin derived from the damaged bark of Commiphora genus, has traditionally been used for treatment of various human diseases, such as amenorrhea, ache, tumors, fever, and stomach pains. In spite of this widespread use of the myrrh in Ethiopia, the pharmacological activity and chemical composition have not been studied in detail. A new tricyclic triterpene acid (3S,4S,14S,7E,17E,21Z)-3, ...
    • Machine Learning-based Classification, Detection, and Segmentation of Medical Images 

      Jha, Debesh (Doctoral thesis; Doktorgradsavhandling, 2022-01-21)
      Gastrointestinal tract (GI) cancers are among the most common types of cancers worldwide. In particular, colorectal cancer (CRC) is the most lethal in terms of number of incidences and mortality (third most common cause of cancer and the second common cause of cancer-related deaths). Colonoscopy is the gold standard for screening patients for CRC. During the colonoscopy, gastroenterologists examine ...
    • High spatial and temporal resolution L- and C-band Synthetic Aperture Radar data analysis from the yearlong MOSAiC expedition 

      Johansson, Malin; Singha, Suman; Spreen, Gunnar; Howell, Stephen; Sobue, Shin-ichi; Davidson, Malcolm (Conference object; Konferansebidrag, 2021-04)
      In the yearlong MOSAIC expedition (2019-2020) R/V Polarstern drifted with sea ice through the Arctic Ocean, with the goal to continually monitor changes in the coupled ocean-ice-atmosphere system throughout the seasons. A substantial amount of synthetic aperture radar (SAR) satellite images overlapping the campaign was collected. Here, we investigate the change in polarimetric features over sea ice ...
    • The Structure of Climate Variability Across Scales 

      Franzke, Christian L.E.; Barbosa, Susana; Blender, Richard; Fredriksen, Hege-Beate; Laepple, Thomas; Lambert, Fabrice; Nilsen, Tine; Rypdal, Kristoffer; Rypdal, Martin; Scotto, Manuel G; Vannitsem, Stephane; Watkins, Nicholas W.; Yang, Lichao; Yuan, Naiming (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-03-05)
      One of the most intriguing facets of the climate system is that it exhibits variability across all temporal and spatial scales; pronounced examples are temperature and precipitation. The structure of this variability, however, is not arbitrary. Over certain spatial and temporal ranges, it can be described by scaling relationships in the form of power laws in probability density distributions and ...
    • First dust measurements with the Solar Orbiter Radio and plasma wave instrument 

      Zaslavsky, A.; Mann, I.; Soucek, J.; Czechowski, A.; Píša, D.; Vaverka, J.; Meyer-Vernet, N.; Maksimovic, M.; Lorfèvre, E.; Issautier, K.; Rackovic Babic, K.; Bale, S.D.; Morooka, M.; Vecchio, A.; Chust, T.; Khotyaintsev, Y.; Krasnoselskikh, V.; Kretzschmar, M.; Plettemeier, D.; Steller, M.; Štverák, Š; Trávnícek, P.; Vaivads, A. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-12-14)
      Context - Impacts of dust grains on spacecraft are known to produce typical impulsive signals in the voltage waveform recorded at the terminals of electric antennas. Such signals (as may be expected) are routinely detected by the Time Domain Sampler (TDS) system of the Radio and Plasma Waves (RPW) instrument on board Solar Orbiter.<p> <p>Aims - We investigate the capabilities of RPW in terms of ...
    • Dynamics of nanodust in the vicinity of a stellar corona: Effect of plasma corotation 

      Czechowski, Andrzej; Mann, Ingrid (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-24)
      Context - In the vicinity of the Sun or other stars, the motion of the coronal and stellar wind plasma must include some amount of corotation, which could affect the dynamics of charged dust particles. In the case of the Sun, this region is now investigated in situ by the Parker Solar Probe. Charged dust particles coming from the vicinity of the Sun can also reach, and possibly be detected by, ...
    • Regional Morpho-Kinematic Inventory of Slope Movements in Northern Norway 

      Rouyet, Line; Lilleøren, Karianne Staalesen; Böhme, Martina; Vick, Louise Mary; Delaloye, Reynald; Etzelmüller, Bernd; Lauknes, Tom Rune; Larsen, Yngvar; Blikra, Lars Harald (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-11-25)
      Mountain slopes in periglacial environments are affected by frost- and gravity-driven processes that shape the landscape. Both rock glaciers and rockslides have been intensively inventoried worldwide. Although most inventories are traditionally based on morphologic criteria, kinematic approaches based on satellite remote sensing have more recently been used to identify moving landforms at the regional ...
    • Recoverability modeling of power distribution systems using accelerated life models: Case of power cut due to extreme weather events in Norway 

      Rød, Bjarte; Barabadi, Abbas; Naseri, Masoud (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-09)
      Today’s societies rely on electric power distribution systems. Recent weather events have illustrated that the loss of such service can lead to severe consequences for societies and stakeholders. Hence, to reduce the impact of such extreme events on infrastructure systems and limit the associated losses, it is crucial to design infrastructure that can bounce back and recover rapidly after disruptions ...
    • Lumped, constrained cable modeling with explicit state-space formulation using an elastic version of Baumgarte stabilization 

      Skjong, Stian; Reite, Karl-Johan; Aarsæther, Karl Gunnar (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-29)
      This paper presents a modeling approach for efficient simulation of slender structures, such as wires, cables and ropes. Lumped structural elements are connected using constraints. These are solved explicitly, using an elastic version of Baumgarte stabilization. This avoids singularities in the matrix inversions. The resulting explicit state-space formulation filters the higher order dynamics and ...
    • Multiwavelets applied to metal–ligand interactions: Energies free from basis set errors 

      Brakestad, Anders; Wind, Peter; Jensen, Stig Rune; Frediani, Luca; Hopmann, Kathrin Helen (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-06-02)
      Transition metal-catalyzed reactions invariably include steps where ligands associate or dissociate. In order to obtain reliable energies for such reactions, sufficiently large basis sets need to be employed. In this paper, we have used high-precision multiwavelet calculations to compute the metal–ligand association energies for 27 transition metal complexes with common ligands, such as H2, CO, ...
    • Differential invariants of Kundt spacetimes 

      Kruglikov, Boris; Schneider, Eivind (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-07)
      We find generators for the algebra of rational differential invariants for general and degenerate Kundt spacetimes and relate this to other approaches to the equivalence problem for Lorentzian metrics. Special attention is given to dimensions three and four.
    • Endocytic motif on a biotin-tagged hiv-1 env modulates the co-transfer of env and gag during cell-to-cell transmission 

      Barría, María Inés; Alvarez, Raymond A.; Law, Kenneth; Wolfson, Deanna; Huser, Thomas; Chen, Benjamin K. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-31)
      During HIV-1 transmission through T cell virological synapses, the recruitment of the envelope (Env) glycoprotein to the site of cell–cell contact is important for adhesion and for packaging onto nascent virus particles which assemble at the site. Live imaging studies in CD4 T cells have captured the rapid recruitment of the viral structural protein Gag to VSs. We explored the role of endocytic ...
    • Evolution of ultrapotassic volcanism on the Kaapvaal craton: deepening the orangeite versus lamproite debate 

      Tappe, Sebastian; Shaikh, Azhar M.; Wilson, Allan H.; Stracke, Andreas (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-02)
      Orangeites are a significant source of diamonds, yet ambiguity surrounds their status among groups of mantle-derived potassic rocks. This study reports mineralogical and geochemical data for a c. 140 Ma orangeite dyke swarm that intersects the Bushveld Complex on the Kaapvaal craton in South Africa. The dykes comprise distinctive petrographic varieties that are linked principally by olivine ...
    • Simple, Axial Ligand-Mediated Route to Water-Soluble Iridium Corroles 

      Thomassen, Ivar K.; Rasmussen, Daniel; Einrem, Rune F.; Ghosh, Abhik (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-06-15)
      The synthesis and purification of water-soluble porphyrin-type compounds for photodynamic therapy and other medical applications is often a tedious exercise. Here, we have investigated the simple stratagem of adding a water-soluble axial ligand to the standard protocol for iridium insertion into simple meso-triarylcorroles. Early results showed that six-coordinate Ir[TpXPC](dna)2 derivatives, in ...
    • Charged dust in the D-region incoherent scatter spectrum 

      Gunnarsdottir, Tinna L.; Mann, Ingrid (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-14)
      We investigate the influence of charged dust on the incoherent scatter from the D-region ionosphere. Incoherent scatter is observed with high-power, large aperture radars and results from electromagnetic waves scattering at electrons that are coupled to other charged components through plasma oscillations. The influence of charged dust can hence be considered an effect of dusty plasma. The D-region ...
    • Criteria for Assessing and Recommending Digital Diabetes Tools: A Delphi Study 

      Larbi, Dillys; Randine, Pietro; Årsand, Eirik; Bradway, Meghan; Antypas, Konstantinos; Gabarron, Elia (Journal article; Tidsskriftartikkel; Peer reviewed, 2021)
      Diabetes self-management, an integral part of diabetes care, can be improved with the help of digital self-management tools such as apps, sensors, websites, and social media. The study objective was to reach a consensus on the criteria required to assess and recommend digital diabetes self-management tools targeting those with diabetes in Norway. Healthcare professionals working with diabetes care ...
    • Experimental and simulated evaluations of airborne contaminant exposure in a room with a modified localized laminar airflow system 

      Cheng, Zhu; Aganovic, Amar; Cao, Guangyu; Bu, Zhongming (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-15)
      The traditional mixing ventilation is not an energy effective approach to remove indoor air pollutants, maintain breath zone air quality, and control the airborne transmission. This study investigated the potential of a localized laminar airflow ventilation system to alleviate human exposure to pollutants. Breathing thermal manikins with sitting posture and supine posture were used to simulate the ...
    • Synthesis of Potential Metallo-β-Lactamase Inhibitors 

      Paulsen, Marianne Hagensen (Master thesis; Mastergradsoppgave, 2012-06-04)
      Oppgaven omhandler syntesen av mulige metallo-beta-lactamaser inhibitorer.
    • Towards automatic detection of dark features in the Barents Sea using synthetic aperture radar 

      Cristea, Anca; Johansson, Malin; Filimonova, Natalya A.; Ivonin, Dmitry; Hughes, Nick; Doulgeris, Anthony Paul; Brekke, Camilla (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-17)
      Increased human presence and commercial activities in the Barents Sea (fishing, offshore oil and gas exploration) are amplifying the need for large-scale operational ocean monitoring of the eventual oil spills in the region. The geographical location and climate impose additional constraints on satellite-based monitoring, making it necessary to use Synthetic Aperture Radar (SAR). Dark features or ...