Results 41 to 50 of about 338,499 (317)
A first comparison of irregularity and ion drift velocity measurements in the E-region [PDF]
, 2006 International audienceE-region irregularity velocity measurements at large flow angles with the STARE Finland coherent VHF radar are considered in context of the ion and electron velocity data provided by the EISCAT tristatic radar system, CUTLASS ...
J. A. Davies +17 more
core +1 more source
Sensors, 2023 The acousto-electric (AE) effect associated with the propagation of the Rayleigh wave in ZnO half-space was theoretically investigated by studying the changes in wave velocity and propagation loss induced by in-depth inhomogeneous changes in the ZnO ...
Cinzia Caliendo
doaj +1 more source
Solving the Christoffel equation: Phase and group velocities [PDF]
Computer Physics Communications, 2016 Abstract We provide christoffel , a Python tool for calculating direction-dependent phase velocities, polarization vectors, group velocities, power flow angles and enhancement factors based on the stiffness tensor of a solid. It is built in a modular way to allow for efficient and flexible calculations, and the freedom to select and combine results ...
Jan W. Jaeken, Stefaan Cottenier
openaire +2 more sources
FEBS Letters, EarlyView.We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee +3 more
wiley +1 more source
FEBS Letters, EarlyView.We identified a systemic, progressive loss of protein S‐glutathionylation—detected by nonreducing western blotting—alongside dysregulation of glutathione‐cycle enzymes in both neuronal and peripheral tissues of Taiwanese SMA mice. These alterations were partially rescued by SMN antisense oligonucleotide therapy, revealing persistent redox imbalance as ...
Sofia Vrettou, Brunhilde Wirth
wiley +1 more source
Dizhen xuebao快速准确地计算走时和射线路径是实现地震成像和反演的关键。在各向异性介质中，地震波的传播速度会随传播方向的变化而变化，这使得求解各向异性条件程函方程时，相速度的精确估计和计算变得非常复杂和困难，进而影响各向异性介质中走时和射线路径的计算精度和效率。为此，提出了一种基于相速度预测的射线追踪方法，该方法根据波的传播规律以及斯奈尔方程，推导出一种相速度预测公式，解决了各向异性条件程函方程中相速度求解困难的问题，实现了快速稳定的射线追踪。数值算例表明，本文所提出的改进算法明显提高了走时计算精度 ...
Zhiyu Zhang, Xue Dong, Yiqun Zhao
doaj +1 more source
Frontiers in Physics, 2021 Shear wave dispersion (variation of phase velocity with frequency) occurs in tissues with layered and anisotropic microstructure and viscous components, such as the uterine cervix.
Abel Torres +4 more
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Calpain small subunit homodimerization is robust and calcium‐independent
FEBS Letters, EarlyView.Calpains dimerize via penta‐EF‐hand (PEF) domains. Using single‐molecule force spectroscopy, we measured the strength and kinetics of PEF–PEF homodimer binding. The interaction is robust, shows a transient conformational step before dissociation, and remains largely insensitive to Ca2+.
Nesha May O. Andoy +4 more
wiley +1 more source
Study on the ultra-wide band gap characteristics of novel star-shaped chiral metamaterials
Hangkong gongcheng jinzhanThe suppression of vibration and noise has always been an important issue in engineering，and metamaterials have shown significant application value in vibration and noise reduction.
WANG Shuo +7 more
doaj +1 more source
Laser Ion Acceleration in a Near Critical Density Trap
Photonics, 2022 In order to accelerate ions by a laser, we go back to the original and the fundamental idea of how longitudinal field structure generation can be carried out in an ionized media and how particles may be trapped by the created wakefield.
Ales Necas +3 more
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