Viser treff 361-380 av 5290

    • The 3-billion fossil question: How to automate classification of microfossils 

      Martinsen, Iver; Wade, David; Godtliebsen, Fred; Ricaud, Benjamin (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-06-08)
      Microfossil classification is an important discipline in subsurface exploration, for both oil & gas and Carbon Capture and Storage (CCS). The abundance and distribution of species found in sedimentary rocks provide valuable information about the age and depositional environment. However, the analysis is difficult and time-consuming, as it is based on manual work by human experts. Attempts to automate ...
    • Disease activity trajectories from childhood to adulthood in the population-based Nordic juvenile idiopathic arthritis cohort 

      Rypdal, Veronika Gjertsen; Glerup, Mia; Rypdal, Martin Wibe; Arnstad, Ellen Dalen; Aalto, Kristiina; Berntson, Lillemor; Fasth, Anders; Herlin, Troels; Myrup, Charlotte; Peltoniemi, Suvi; Rygg, Marite; Nordal, Ellen Berit (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-08)
      Objectives To identify long-term disease activity trajectories from childhood to adulthood by using the clinical Juvenile Arthritis Disease Activity Score (cJADAS10) in juvenile idiopathic arthritis (JIA). Second, to evaluate the contribution of the cJADAS10 components and explore characteristics associated with active disease at the 18- year follow-up.<p> <p>Methods Patients with onset of ...
    • Towards ultrafast quantitative phase imaging via differentiable microscopy [Invited] 

      Haputhanthri, Udith; Herath, Kithmini; Hettiarachchi, Ramith; Kariyawasam, Hasindu; Ahmad, Azeem; Ahluwalia, Balpreet Singh; Acharya, Ganesh Prasad; Edussooriya, Chamira U.S.; Wadduwage, Dushan N. (Journal article, 2024-02-22)
      With applications ranging from metabolomics to histopathology, quantitative phase microscopy (QPM) is a powerful label-free imaging modality. Despite significant advances in fast multiplexed imaging sensors and deep-learning-based inverse solvers, the throughput of QPM is currently limited by the pixel-rate of the image sensors. Complementarily, to improve throughput further, here we propose to ...
    • Exploring the Frozen Armory: Antiphage Defense Systems in Cold-Adapted Bacteria with a Focus on CRISPR-Cas Systems 

      Sandsdalen, Greta Daae; Kumar, Animesh; Hjerde, Erik (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-05-20)
      Our understanding of the antiphage defense system arsenal in bacteria is rapidly expanding, but little is known about its occurrence in cold-adapted bacteria. In this study, we aim to shed light on the prevalence and distribution of antiphage defense systems in cold-adapted bacteria, with a focus on CRISPR-Cas systems. Using bioinformatics tools, Prokaryotic Antiviral Defense LOCator (PADLOC) and ...
    • Revisiting Unsinkable Ships: From Titanic to Helge Ingstad, the Long-Standing Issues and Persistent Risks of Ship Disasters 

      Johansen, Kåre; Gudmestad, Ove Tobias (Journal article; Tidsskriftartikkel, 2024-03)
      The objective of this paper is to take a closer look at the theory of damage stability, i.e., origin, construction, organization and human developments, regulations, and in this context pinpoint a possible causal relationship between two specific ship losses: the losses of RMS Titanic and KNM Helge Ingstad. The paper does not discuss direct causes but rather tries to discuss possible causal links ...
    • Simulations of the collection of mesospheric dust particles with a rocket instrument 

      Pineau, Adrien; Trollvik, Henriette M.; Greaker, Herman; Olsen, Sveinung viggo; Eilertsen, Yngve; Mann, Ingrid Brigitte (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-06-28)
      We investigate the collection of dust particles in the mesosphere with the MESS (MEteoric Smoke Sampler) instrument that is designed to fly on a sounding rocket. We assume that the ice particles that form in the polar mesosphere between 80 and 85 km altitude in summer contain meteoric smoke particles; and these should be collected with MESS. The instrument consists of a collection device with an ...
    • Deepfake detection using deep feature stacking and meta-learning 

      Naskar, Gourab; Mohiuddin, Sk; Malakar, Samir; Cuevas, Erik; Sarkar, Ram (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-02-15)
      Deepfake is a type of face manipulation technique using deep learning that allows for the replacement of faces in videos in a very realistic way. While this technology has many practical uses, if used maliciously, it can have a significant number of bad impacts on society, such as spreading fake news or cyberbullying. Therefore, the ability to detect deepfake has become a pressing need. This ...
    • Digital Psychosocial Follow-up for Childhood Critical Illness Survivors: A Qualitative Interview Study on Health Professionals' Perspectives 

      Hagen, Marte Hoff; Hartvigsen, Gunnar; Jaccheri, Maria Letizia; Papavlasopoulou, Sofia (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-07-18)
      Background: Digital solutions have been reported to provide positive psychological and social outcomes to childhood critical illness survivors, a group with an increased risk for long-term adverse psychosocial effects. Objective: To explore health professionals’ perspectives on the potential of digital psychosocial follow-up for childhood critical illness survivors.<p> <p>Methods: Using a ...
    • Identification of extracellular vesicles from their Raman spectra via self-supervised learning 

      Jensen, Mathias Novik; Mazagao Guerreiro, Eduarda; Enciso-Martinez, Agustin; Kruglik, Sergei G.; Otto, Cees; Snir, Omri; Ricaud, Benjamin; Hellesø, Olav Gaute (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-21)
      Extracellular vesicles (EVs) released from cells attract interest for their possible role in health and diseases. The detection and characterization of EVs is challenging due to the lack of specialized methodologies. Raman spectroscopy, however, has been suggested as a novel approach for biochemical analysis of EVs. To extract information from the spectra, a novel deep learning architecture is ...
    • Knowledge and attitudes regarding pressure injuries among assistant nurses in a clinical context 

      Bjurbo, Charlotte; Wetzer, Elisabeth; Thunborg, David; Zhang, Li; Hultin, Lisa (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-06-25)
      This study aimed to evaluate assistant nurses' knowledge of and attitudes towards pressure injuries in a clinical setting. It employed a cross-sectional design, using two validated surveys: PUKAT 2.0 and APUP, alongside open-ended questions. A convenience sample of 88 assistant nurses from five wards across two departments at a 600-bed university hospital in Sweden participated. Participants answered ...
    • Concatenated Modified LeNet Approach for Classifying Pneumonia Images 

      Jaganathan, Dhayanithi; Balsubramaniam, Sathiyabhama; Sureshkumar, Vidhushavarshini; Dhanasekaran, Seshathiri (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-21)
      Pneumonia remains a critical health concern worldwide, necessitating efficient diagnostic tools to enhance patient care. This research proposes a concatenated modified LeNet classifier to classify pneumonia images accurately. The model leverages deep learning techniques to improve the diagnosis of Pneumonia, leading to more effective and timely treatment. Our modified LeNet architecture incorporates ...
    • Understanding Inner Solar System Dust Environment Through In-Situ Measurements 

      Kočiščák, Samuel (Doctoral thesis; Doktorgradsavhandling, 2024-10-04)
      It is apparent from remote observations that the density of interplanetary dust is the highest in the near-solar region. Yet, there were little in-situ data available from measurements from within 1 AU before Parker Solar Probe (PSP) and Solar Orbiter (SolO) missions. They both venture close to the Sun on elliptical orbits, and they are equipped with electrical antennas capable of dust detection, ...
    • A state-of-the-art review of AI decision transparency for autonomous shipping 

      Madsen, Andreas Nygard; Kim, Tae Eun (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-04-03)
      The introduction of maritime autonomous surface ships (MASSs) has prompted a significant shift in the role of navigators from traditional navigation to supervising artificial intelligence (AI) collision avoidance systems or managing operations from remote operation centers (ROCs). This may be problematic because the integration of AI technologies into collision avoidance systems may jeopardize safety ...
    • High space–time bandwidth product imaging in low coherence quantitative phase microscopy 

      Ahmad, Azeem; Goclowski, Pawel Piotr; Dubey, Vishesh Kumar; Trusiak, Maciej; Ahluwalia, Balpreet Singh (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-04-22)
      Current low coherence quantitative phase microscopy (LC-QPM) systems suffer from either reduced field of view (FoV) or reduced temporal resolution due to the short temporal coherence (TC) length of the light source. Here, we propose a hybrid, experimental and numerical approach to address this core problem associated with LC-QPM. We demonstrate high spatial resolution and high phase sensitivity in ...
    • Diagnostics analysis of partial discharge events of the power cables at various voltage levels using ramping behavior analysis method 

      Mishra, Sambeet; Singh, Praveen Prakash; Kiitam, Ivar; Shafiq, Muhammad; Palu, Ivo; Bordin, Chiara (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-16)
      Partial discharge events can occur in high-voltage cables. It can be caused by defects in the cable insulation, contamination, or a combination of both. Partial discharge in cables can lead to insulation failure and cable failure. This investigation aims to identify the trends and patterns in the internal partial discharge (PD) occurrences in the power cables when exposed to different voltage ...
    • Assimilation of satellite swaths versus daily means of sea ice concentration in a regional coupled ocean–sea ice model 

      Durán Moro, Marina; Sperrevik, Ann Kristin; Lavergne, Thomas; Bertino, Laurent; Gusdal, Yvonne; Iversen, Silje Christine; Rusin, Jozef (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-04-08)
      Operational forecasting systems routinely assimilate daily means of sea ice concentration (SIC) from microwave radiometers in order to improve the accuracy of the forecasts. However, the temporal and spatial averaging of the individual satellite swaths into daily means of SIC entails two main drawbacks: (i) the spatial resolution of the original product is blurred (especially critical in periods ...
    • Analyzing the MHD Bioconvective Eyring–Powell Fluid Flow over an Upright Cone/Plate Surface in a Porous Medium with Activation Energy and Viscous Dissipation 

      Peter, Francis; Sambath, Paulsamy; Dhanasekaran, Seshathiri (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-04)
      In the field of heat and mass transfer applications, non-Newtonian fluids are potentially considered to play a very important role. This study examines the magnetohydrodynamic (MHD) bioconvective Eyring–Powell fluid flow on a permeable cone and plate, considering the viscous dissipation (0.3 ≤ E<sub>c</sub> ≤ 0.7), the uniform heat source/sink (−0.1 ≤ Q<sub>0</sub> ≤ 0.1), and the activation energy ...
    • Theoretical Photoelectron Spectroscopy of Quadruple-Bonded Dimolybdenum(II,II) and Ditungsten(II,II) Paddlewheel Complexes: Performance of Common Density Functional Theory Methods 

      Ghosh, Abhik; Conradie, Jeanet (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-03-03)
      We have revisited the gas-phase photoelectron spectra of quadruplebonded dimolybdenum(II,II) and ditungsten(II,II) paddlewheel complexes with modern density functional theory methods and obtained valuable calibration of four well-known exchange−correlation functionals, namely, BP86, OLYP, B3LYP*, and B3LYP. All four functionals were found to perform comparably, with discrepancies between calculated ...
    • Inverse Photoemission Spectroscopy of Coinage Metal Corroles: Comparison with Solution-Phase Electrochemistry 

      Giovanelli, Luca; Ksari, Younal; Mrezguia, Hela; Salomon, Eric; Minissale, Marco; Alemayehu, Abraham; Ghosh, Abhik (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-06-19)
      A combined direct and inverse photoemission study of coinage metal corroles suggests that the latter technique, in favorable cases, can provide some additional information relative to electrochemical measurements. Thus, whereas inverse photoemission spectroscopy (IPES) provides relative electron affinities for electron addition to different unoccupied orbitals, electrochemical reduction potentials ...
    • Sea ice transport and replenishment across and within the Canadian Arctic Archipelago, 2016-2022 

      Howell, Stephen E. L.; Babb, David G.; Landy, Jack Christopher; Glissenaar, Isolde A.; McNeil, Kaitlin; Montpetit, Benoit; Brady, Mike (Journal article; Tidsskriftartikkel; Peer reviewed, 2024-05-07)
      The Canadian Arctic Archipelago (CAA) serves as both a source and a sink for sea ice from the Arctic Ocean, while also exporting sea ice into Baffin Bay. We use observations from Sentinel-1, RADARSAT-2, the RADARSAT Constellation Mission (RCM), and CryoSat-2, together with the Canadian Ice Service ice charts, to quantify sea ice transport and replenishment across and within the CAA from 2016 to ...