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  • 1
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    Meteor radar and airglow wind determinations and their interpretation (2023)
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
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    Publication Date: 2023-07-07
    Description: This paper describes comparisons between airglow and meteor radar winds from two co-located wind measuring instruments, a meteor radar and field widened Michelson interferometer (the E-Region Wind Interferometer, ERWIN) and the interpretation of the results. These instruments are located at the Polar Environment Atmospheric Research Laboratory (PEARL) in Eureka, Nu, Canada (80 N, 86 W). ERWIN provides winds from three nightglow emissions (the oxygen green line (557.7 nm) at ~97 km, an O2 line (866 nm) at ~94 km, and an OH line (843 nm) at ~87 km) on a ~5 minute cadence and an accuracy of ~1 , ~4 and ~1 m/s respectively. The meteor radar and ERWIN have very different temporal and spatial observational footprints. The meteor radar typically provides winds determined on a 60-minute cadence and a 3 km height resolution from a spatial region of ~300 km diameter and ~16 km depth whereas the ERWIN winds are airglow weighted winds from four volumes of ~6 km in height by 6 km radius. After time averaging the ERWIN winds and vertically averaging the radar winds, the winds are found to be strongly correlated. Linear fits indicate that the zero winds of the two techniques agree to ~ 1m/s with the meteor radar exhibiting greater variability than ERWIN. Directional comparisons indicate that the winds are in the same direction but the difference is primarily in the amplitudes. Possible explanations for this discrepancy are described but further work is required to cleanly identify the source of the amplitude difference.
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
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    PAPER (OA)
  • 2
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    Whole-Body Regeneration (2022)
    Springer Nature | Humana
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    Publication Date: 2024-04-05
    Description: This Open Access volume provides a comprehensive overview of the latest tools available to scientists to study the many facets of whole-body regeneration (WBR). The chapters in this book are organized into six parts. Part One provides a historical overview on the study of the WBR phenomena focusing on the primary challenges of this research. Parts Two and Three explore a series of non-vertebrate zoological contexts that provide experimental models for WBR, showing how they can be approached with cellular tools. Parts Four, Five, and Six discuss the future advancements of WBR, reporting about the cutting-edge techniques in genetics and omics used to dissect the underlying mechanisms of WBR, and systems biology approaches to reach a synthetic view of WBR. Written in the highly successful Methods in Molecular Biology series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls. Authoritative and thorough, Whole-Body Regeneration: Methods and Protocols is a valuable resource for scientists and researchers who want to learn more about this important and developing field.
    Keywords: immune response ; cell sorting ; stem cells ; cell isolation ; apoptosis ; Open Access ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences::PSF Cellular biology (cytology) ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences::PSA Life sciences: general issues::PSAK Genetics (non-medical)
    Language: English
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    E-BOOK
  • 3
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    Chapter Near-Infrared Spectroscopy Measured Cerebral Blood Flow from Spontaneous Oxygenation Changes in Neonatal Brain Injury (2022)
    Springer Nature | Oxygen Transport to Tissue XLI
    Details
    Publication Date: 2024-04-01
    Description: Neonates with hypoxic-ischaemic (HI) brain injury were monitored using a broadband near-infrared spectroscopy (NIRS) system in the neonatal intensive care unit. The aim of this work is to use the NIRS cerebral oxygenation data (HbD = oxygenated-haemoglobin – deoxygenated-haemoglobin) combined with arterial saturation (SaO2) from pulse oximetry to calculate cerebral blood flow (CBF) based on the oxygen swing method, during spontaneous desaturation episodes. The method is based on Fick’s principle and uses HbD as a tracer; when a sudden change in SaO2 occurs, the change in HbD represents a change in tracer concentration, and thus it is possible to estimate CBF. CBF was successfully calculated with broadband NIRS in 11 HIE infants (3 with severe injury) for 70 oxygenation events on the day of birth. The average CBF was 18.0 ± 12.7 ml 100 g−1 min−1 with a range of 4 ml 100 g−1 min−1 to 60 ml 100 g−1 min−1. For infants with severe HIE (as determined by magnetic resonance spectroscopy) CBF was significantly lower (p = 0.038, d = 1.35) than those with moderate HIE on the day of birth.
    Keywords: Near-infrared spectroscopy; Cerebral blood flow; Neonatal brain injury; Hypoxic-ischaemic encephalopathy; Clinical ; thema EDItEUR::M Medicine and Nursing::MK Medical specialties, branches of medicine::MKD Paediatric medicine::MKDN Neonatal medicine
    Language: English
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    E-BOOK
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