Results 21 to 30 of about 35,394 (266)
ChandraObservations of Low Velocity Dispersion Groups [PDF]
The Astrophysical Journal, 2005 Deviations of galaxy groups from cluster scaling relations can be understood in terms of an excess of entropy in groups. The main effect of this excess is to reduce the density and thus luminosity of the intragroup gas. Given this, groups should also should show a steep relationship between X-ray luminosity and velocity dispersion.
Helsdon, Stephen F. +2 more
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Radial Velocity Dispersions of Star Groups in M67
Open Astronomy, 2016 AbstractHigh-precision measurements of radial velocities of the M67 cluster members are used to calculate the radial-velocity dispersions in the stellar groups found earlier in the cluster’s corona. The previously detected feature in one of the groups (Group 60) consisting of stars with almost identical space velocities was confirmed.
Vereshchagin S. V., Chupina N. V.
openaire +3 more sources
Numerical Simulation of Three-Core Photonic Crystal Fiber With Large Group-Velocity Dispersion
IEEE Access, 2020 The three-core photonic crystal fiber (TC-PCF) is proposed to obtain large group-velocity dispersion (GVD) because of the coupling effects between the fundamental modes (FMs) of the central core and higher-order modes (HOMs) of the two side cores.
Jianfang Yang +3 more
doaj +1 more source
Remote Sensing, 2019 The wavenumber-frequency spectra of many radar measurements of the sea surface contain a linear feature at frequencies lower than the first order dispersion relationship commonly referred to as the “group line”.
Andrew J. Kammerer, Erin E. Hackett
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Applied Sciences, 2021 Guided waves have immense potential for structural health monitoring applications in numerous industries including aerospace. It is necessary to evaluate guided wave dispersion characteristics, i.e., group velocity and phase velocity profiles, for using ...
Muhammad Khalid Malik +2 more
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JGEUnderstanding of Earth's subsurface is crucial for mitigating geological hazards, particularly earthquakes. A key parameter for subsurface characterization is the surface wave dispersion curve, which strongly reflects shear wave velocity (Vs) at various ...
Muhammad Fachrul Rozi Kurniawan +2 more
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Identification of microstructured materials by phase and group velocities
Mathematical Modelling and Analysis, 2009 An inverse problem to determine parameters of microstructured solids by means of group and phase velocities of wave packets is studied. It is proved that in the case of normal dispersion the physical solution is unique and in the case of anomalous ...
Jaan Janno, Jüri Engelbrecht
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Earth and Space Science, 2021 The Sichuan‐Yunnan region is located at the intersection between the South China Block, the Indian plate, and the Tibet Plateau and is crisscrossed with deep and large faults and is characterized by strong seismic activities and the extrusion of the ...
Haoyu Tian, Chuansong He, M. Santosh
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Early Impact of Childhood Opportunity on Neurocognitive Outcomes in Sickle Cell Disease
Pediatric Blood &Cancer, EarlyView.ABSTRACT Introduction Neurocognitive impairment is a well‐recognized complication of sickle cell disease (SCD) that begins early in childhood and persists across development. While cerebrovascular injury contributes substantially to risk, neurocognitive deficits are also observed in children without overt or silent cerebral infarctions, suggesting ...
Julia E. LaMotte +5 more
wiley +1 more source
FEBS Letters, EarlyView.Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho +3 more
wiley +1 more source