Now showing items 2721-2740 of 36873

    • Probabilistic impact localization in composites using wavelet scattering transform and multi-output Gaussian process regression 

      Ojha, Shivam; Jangid, Naveen; Shelke, Amit; Habib, Anowarul (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-06-14)
      Data-driven machine-learning models offer considerable promise for acoustic source localization. However, many existing models rely on training data that correlates time-of-flight (TOF) measurements with source locations, yet they struggle to handle the complexities arising from nonlinear wave propagation in materials with varying properties. Furthermore, these models overlook the noise and ...
    • VAMPyR—A high-level Python library for mathematical operations in a multiwavelet representation 

      Bjørgve, Magnar; Tantardini, Christian; Jensen, Stig Rune; Gerez Sazo, Gabriel Adolfo; Wind, Peter; Eikås, Roberto Di Remigio; Dinvay, Evgueni; Frediani, Luca (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-04-26)
      Wavelets and multiwavelets have lately been adopted in quantum chemistry to overcome challenges presented by the two main families of basis sets: Gaussian atomic orbitals and plane waves. In addition to their numerical advantages (high precision, locality, fast algorithms for operator application, linear scaling with respect to system size, to mention a few), they provide a framework that narrows ...
    • Effect on catch efficiency and bycatch by introducing an Excluder device in the trawl fishery for lesser sandeel (Ammodytes marinus) 

      Eigaard, Ole R.; Sparrevohn, Claus R.; Søgaard, Mathias; Herrmann, Bent (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-07-31)
      Sampling of the North Sea trawl fishery for lesser sandeel (Ammodytes marinus) showed that 96% of the catch weight consisted of the target species, and experimental sea trials demonstrated that the observed small bycatch percentages of haddock (Melanogrammus aeglefinus), mackerel (Scomber scombrus) and grey gurnard (Eutrigla gurnardus) could be significantly lowered by inserting a netting-based ...
    • Repair Options for Corrosion-damaged Prestressed Concrete Structures 

      Sharma, Suraksha; Osmolska, Magdalena Jadwiga; Hornbostel, Karla; Bathen, Lise; Novakova, Iveta; Geiker, Mette Rica (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-07-05)
      Prestressing of bridges allows construction of long spanned bridges made from thin structural members with high flexural and shear capacity. Studies have shown that some of the existing prestressed bridges are not meeting their designed service life due to corrosion of the tendons. The main reasons are poor construction practices in combination with inadequate inspection and maintenance plans. ...
    • Mechanical Impact of Heterogeneously Distributed H2O on Quartz Deformation 

      Pongrac, Petar; Jeřábek, Petr; Stunitz, Holger; Raimbourg, Hugues; Racek, Martin; Jollands, Michael C.; Gies, Nils; Lueder, Mona; Lexa, Ondrej; Nègre, Lucille (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-07-31)
      In order to identify relations between mechanical behavior, deformation mechanisms, microstructural properties, and H<sub>2</sub>O distribution, Tana‐quartzite samples with added H<sub>2</sub>O ranging from 0 to 0.5 wt.% were deformed by axial shortening at constant displacement rates, at 900°C and 1 GPa, reaching up to ∼30% bulk strain. Samples with lower quantities of added H<sub>2</sub>O (0.1 ...
    • Virus-specific antibody secreting cells reside in the peritoneal cavity and systemic immune sites of Atlantic salmon (Salmo salar) challenged intraperitoneally with salmonid alphavirus 

      Jenberie, Shiferaw; Nordli, Henriette R.; Strandskog, Guro; Greiner-Tollersrud, Linn; Penaranda, Ma Michelle Demogina; Jørgensen, Jorunn B; Jensen, Ingvill (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-05-08)
      The development and persistence of antibody secreting cells (ASC) after antigenic challenge remain inadequately understood in teleosts. In this study, intraperitoneal (ip) injection of Atlantic salmon (Salmo salar) with salmonid alphavirus (WtSAV3) increased the total ASC response, peaking 3–6 weeks post injection (wpi) locally in the peritoneal cavity (PerC) and in systemic lymphoid tissues, ...
    • Health-related quality of life among older adults following acute hospitalization: longitudinal analysis of a randomized controlled trial 

      Robinson, Eirin Guldsten; Gyllensten, Hanna; Granås, Anne Gerd; Halvorsen, Kjell Hermann; Garcia, Beate Hennie (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-06-17)
      Purpose To describe the longitudinal change of health-related quality of life (HRQoL) over 12 months from acute hospitalization in older adults≥70 years (IMMENSE study), and associated factors, to investigate how a medication optimization intervention infuenced this change.<p> <p>Methods The EQ-5D-3L was used at discharge and 1, 6 and 12 months after discharge during a randomized controlled trial ...
    • Gender Differences in Cardiac Organ Damage in Arterial Hypertension: Assessing the Role of Drug Nonadherence 

      Aune, Arleen; Ohldieck, Annabel Eide; Halvorsen, Lene Vernås; Brobak, Karl Marius; Olsen, Erik; Rognstad, Stine; Larstorp, Anne Cecilie Kjeldsen; Søraas, Camilla Lund; Rossebø, Anne Bjørhovde; Rösner, Assami; Grytaas, Marianne Aardal; Gerdts, Eva (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-26)
      Introduction Cardiac organ damage like left ventricular (LV) hypertrophy and left atrial (LA) enlargement is more prevalent in women than men with hypertension, but the mechanisms underlying this gender difference remain unclear.<p> <p>Methods We tested the association of drug nonadherence with the presence of LV hypertrophy and LA enlargement by echocardiography in 186 women and 337 men with ...
    • Modeling and Stability Analysis of Fuel Cell-Based Marine Hybrid Power Systems 

      Shakeri, Nastaran; Chen, Wenjie; Zadeh, Mehdi; Abdelhakim, Ahmed; Sørensen, Asgeir Johan; Tai, Kang (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-10-18)
      This article proposes a framework for stability analysis of hydrogen fuel cell-based hybrid power systems (HPSs) for zero-emission propulsion. An analytical model is developed, and a comprehensive modal analysis is performed to address the HPS dynamic interactions. Sensitivity analysis assesses the impact of operating conditions, control parameters of the governor and converter controllers, and ...
    • Exploring the effects of methodological choices on the estimation and biological interpretation of life history parameters for harbour porpoises in Norway and beyond 

      Frie, Anne Kirstine Højholt; Lindstrøm, Ulf Ove (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-07-15)
      This study investigates effects of subtle methodological choices on the estimation and biological interpretation of age, growth and reproductive parameters for harbour porpoises. The core analyses are based on a focal Norwegian data set built on samples from 134 harbour porpoises caught incidentally in gillnet fisheries along the Norwegian coast during autumn 2016 and spring 2017. Two contrasting ...
    • Maternal death and maternal morbidity in Georgia 

      Skhvitaridze, Natia (Doctoral thesis; Doktorgradsavhandling, 2024-10-25)
      Maternal death (MD) and morbidity are indicators for maternal health and healthcare system development. This PhD project aimed to investigate MD, maternal morbidity, and related risk factors in Georgia using data from the Georgian Birth Registry (GBR) and digital health surveillance systems. Paper I, with a case series design, identified direct and indirect causes of MD from 2014 to 2017. Paper ...
    • An experimental study on thermophysical properties of nano- TiO2-enhanced phase change materials for cold climate applications 

      Ravasio, Lucrezia; Hayat, Muhammad Aamer; Calay, Rajnish Kaur; Riise, Raymond; Chen, Yong (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-01-30)
      In high-energy-demand regions, such as the Arctic, the building sector is focused on reducing the carbon footprint and mitigating environmental impact. To achieve this, phase change materials (PCMs) are being investigated for thermal energy storage due to their high latent heat of fusion. However, their limited applications arise from poor thermal conductivity. In addressing this issue, the ...
    • “That-which-must-not-be-named”: hunting, secrecy, and the ontology of meat in northeast China 

      Fraser, Richard Alan (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-07-22)
      In this paper, I describe the practice of sharing and eating wild meat amongst the Orochen in northeast China, a community of hunters who are no longer allowed to hunt due to state conservation policies. I show how for Orochen meat is the material intermediary between the human and nonhuman worlds, offered to the fire before meals and to animal spirit-masters during hunting. I suggest this demands ...
    • Effect of Therapeutic Drug Monitoring on Adherence and Blood Pressure: A Multicenter Randomized Clinical Trial 

      Halvorsen, Lene Vernås; Søraas, Camilla Lund; Larstorp, Anne Cecilie Kjeldsen; Hjørnholm, Ulla; Kjær, Vibeke Norheim; Liestøl, Knut; Aune, Arleen; Olsen, Erik; Brobak, Karl Marius; Bergland, Ola Undrum; Rognstad, Stine; Aarskog, Nikolai Ravn; Heimark, Sondre; Fadl Elmula, Fadl Elmula M.; Gerdts, Eva; Mo, Rune; Solbu, Marit Dahl; Opdal, Mimi Stokke; Kjeldsen, Sverre; Rostrup, Morten; Høieggen, Aud (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-01-07)
      BACKGROUND - Drug concentration in blood or urine is an acknowledged method to detect nonadherence. Observational studies suggest that informing patients about low or absent serum drug levels improves blood pressure (BP). We performed a multicenter randomized clinical trial to test the hypothesis that therapeutic drug monitoring (TDM) could improve drug adherence and BP in patients with uncontrolled ...
    • Science Textbooks: Aids or Obstacles to Inquiry Teaching? Science Teachers’ Experiences in Norwegian Secondary Schools 

      Isaksen, Marianne; Ødegaard, Marianne; Utsi, Tove Hilde Ågnes (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-02-16)
      Textbooks have several important functions in science education. By interviewing six teachers, this study shows how secondary school science teachers perceive and use textbooks as resources, especially in inquiry teaching. The results show that textbooks aid inquiry teaching by offering teachers easily accessible suggestions for practical and inquiry activities in accordance with the curriculum ...
    • Photosynthetic light requirement near the theoretical minimum detected in Arctic microalgae 

      Hoppe, Clara J. M.; Fuchs, Niels; Notz, Dirk; Anderson, Philip; Assmy, Philipp Kurt Wolf; Berge, Jørgen; Bratbak, Gunnar; Guillou, Gaël; Kraberg, Alexandra; Larsen, Aud; Lebreton, Benoit; Leu, Eva; Lucassen, Magnus; Müller, Oliver; Oziel, Laurent; Rost, Björn; Schartmüller, Bernhard; Torstensson, Anders; Wloka, Jonas (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-09-04)
      Photosynthesis is one of the most important biological processes on Earth, providing the main source of bioavailable energy, carbon, and oxygen via the use of sunlight. Despite this importance, the minimum light level sustaining photosynthesis and net growth of primary producers in the global ocean is still unknown. Here, we present measurements from the MOSAiC field campaign in the central Arctic ...
    • Observing fish behavior in towed fishing gear—is there an influence of artificial light? 

      Brinkhof, Jesse Vallevik; Sistiaga, Manu; Herrmann, Bent; Karlsen, Junita Diana; Grimaldo, Eduardo; Jacques, Nadine Louise; Bak-Jensen, Zita (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-08-29)
      Fish behavior is important to consider when developing selective fishing gear. In studies designed to investigate the size selective properties of towed fishing gears such as trawls, fish behavior is mainly documented by underwater video recordings. Because fishing gear can be operated at great depths or in other low light environments, artificial light is often required for underwater recordings. ...
    • Transdiagnostic Associations between Anger Hostility and Chemokine Interferon-gamma Inducible Protein 10 

      Soløy-Nilsen, Hedda; Nygaard-Odeh, Kristin; Kristiansen, Magnhild Gangsøy; Kvig, Erling Inge; Brekke, Ole Lars; Mollnes, Tom Eirik; Berk, Michael; Reitan, Solveig Klæbo; Øiesvold, Terje (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-07-17)
      Objective: Many psychiatric disorders are linked to low grade systemic inflammation as measured by systemic cytokine levels. Exploration of cytokines and immune activity and their role in psychiatric symptoms may inform pathobiology and treatment opportunities. The aim of this study is to explore if there are associations between cytokines and psychiatric symptom clusters. Comparison between patients ...
    • Oscillatory and spectral properties of a class of fourth-order differential operators via a new Hardy-type inequality 

      Oinarov, Ryskul; Kalybay, Aigerim; Persson, Lars-Erik (Journal article; Tidsskriftartikkel; Peer reviewed, 2024)
      In this paper, we study oscillatory properties of a fourth-order differential equation and spectral properties of a corresponding differential operator. These properties are established by f irst proving a new second-order Hardy-type inequality, where the weights are the coefficients of the equation and the operator. This new inequality, in its turn, is established for functions satisfying certain ...
    • Women’s experience of preterm birth in an East African context: A qualitative study 

      Habtu, Thomas Asmelash; Pembe, Andrea Barnabas; Chiwanga, Faraja; Odland, Jon Øyvind; Darj, Elisabeth (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-04-01)
      Background: Approximately 15 million children are born each year prematurely, representing more than 10 percent of all childbirths worldwide. Prematurity is an acute event and the leading cause of death among newborns and children under five. Sixty percent of these premature deaths occur in Sub-Saharan Africa and Southeast Asia.<p> <p>Objective: The current study aimed to explore and understand ...