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Attenuation of progressive surface gravity waves by floating spheres.
Sci Rep
January 2025
Faculty of Civil Engineering and Geosciences, Delft University of Technology, 2628 CD, Delft, The Netherlands.
Laboratory experiments were performed to investigate the attenuation of progressive deep-water waves by a mono-layer of loose- and close-packed floating spheres. We measured the decay distance of waves having different incident wave frequency and steepness. The attenuation of waves was strong if the surface concentration of particles was close-packed, with the decay distance being shorter for incident waves with higher frequency and steepness.
View Article and Find Full Text PDFHeavy gravity combined with light gravity local anesthetic in subarachnoid anesthesia for cesarean section did not reduce the incidence of intraoperative hypotension in maternal women: a prospective cohort study.
BMC Anesthesiol
January 2025
Department of Anesthesiology, Affiliated Maternity and Child Health Care Hospital of Nantong University, Nantong, Jiangsu, China.
Background: Subarachnoid anesthesia is the primary anesthetic method for elective cesarean section surgery, characterized by rapidly taking effect and reliable analgesia. However, subarachnoid anesthesia is prone to cause a high block level, resulting in a high incidence of maternal hypotension. How to reduce the incidence of maternal hypotension under subarachnoid anesthesia is a practical problem that needs to be solved urgently in clinical practice.
View Article and Find Full Text PDFBias in mobility datasets drives divergence in modeled outbreak dynamics.
Commun Med (Lond)
January 2025
Department of Demography, University of California, Berkeley, California, USA.
Background: Digital data sources such as mobile phone call detail records (CDRs) are increasingly being used to estimate population mobility fluxes and to predict the spatiotemporal dynamics of infectious disease outbreaks. Differences in mobile phone operators' geographic coverage, however, may result in biased mobility estimates.
Methods: We leverage a unique dataset consisting of CDRs from three mobile phone operators in Bangladesh and digital trace data from Meta's Data for Good program to compare mobility patterns across these sources.
Role and modulation of various spinal pathways for human upper limb control in different gravity conditions.
PLoS Comput Biol
January 2025
Biorobotics Laboratory, EPFL, Lausanne, Switzerland.
Humans can perform movements in various physical environments and positions (corresponding to different experienced gravity), requiring the interaction of the musculoskeletal system, the neural system and the external environment. The neural system is itself comprised of several interactive components, from the brain mainly conducting motor planning, to the spinal cord (SC) implementing its own motor control centres through sensory reflexes. Nevertheless, it remains unclear whether similar movements in various environmental dynamics necessitate adapting modulation at the brain level, correcting modulation at the spinal level, or both.
View Article and Find Full Text PDFCryogenic front-end circuit for capacitive sensing in superconducting gravimeters.
Rev Sci Instrum
January 2025
Article Synopsis
- Capacitive sensors are essential for superconducting gravimeters due to their precision and minimal drift, prompting the development of a cryogenic front-end circuit to address parasitic capacitance issues.
- The new circuit includes a noiseless superconducting transformer and a low-noise cryogenic preamplifier, significantly boosting the transfer coefficient and reducing displacement noise compared to circuits operating at room temperature.
- Testing of the cryogenic front-end circuit with a superconducting gravimeter showed that the gravity data aligned well with theoretical models, indicating its effectiveness and stability over time.
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