Results 231 to 240 of about 4,489,694 (277)

Characterization of High‐Frequency GNSS Total Electron Content Variations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract Global Navigation Satellite System (GNSS)–derived Total Electron Content (TEC) is widely used to investigate ionospheric variability, but has primarily been applied to low‐frequency fluctuations. Here we present a long‐term statistical characterization of high‐frequency (30–500 mHz) TEC variations using multi‐constellation GNSS data from 11 ...
J. Pérez‐Coll Jiménez, N. Ivchenko, N. Partamies, M. Håkansson   +3 more
wiley   +1 more source

Overcoming Mechanical Blindness: Adaptive Surgical Instrument Design for the Heterogeneous Landscape of Uterine Fibroids. [PDF]

Research (Wash D C)
Liu J, Liu R, Xie X, Zhang L, Zhao Y, Sun B, Zhang Y, Chen S, Chen W, Liu Y, Jiang S, Chen C, Sun C, Guo J, Xiong C.   +14 more
europepmc   +1 more source

Variation of Global Ionospheric Scintillation and Its Effect on GPS Kinematic PPP‐AR Performance During Geomagnetic Storms in Solar Cycle 25: A Statistical Analysis

Space Weather, Volume 24, Issue 10, October 2026.
Abstract Enhanced small‐scale ionospheric irregularities during geomagnetic storms can disturb Global Navigation Satellite System (GNSS) carrier‐phase tracking and are associated with reduced stability of ambiguity‐fixed precise point positioning (PPP‐AR), but their impact on kinematic positioning remains insufficiently quantified.
Dongsheng Zhao, Qichen Zhao, Shuanglei Cui, Kefei Zhang, Longjiang Li, Wang Li, Zhongchao Shi, Craig M. Hancock   +7 more
wiley   +1 more source

Ionospheric Mechanisms Leading to Plasma‐Bubble Zonal Drift Reversal and Deformation During the 12 November 2025 Geomagnetic Storm

Space Weather, Volume 24, Issue 10, October 2026.
Abstract We present a multi‐instrument analysis of the ionospheric response to the intense geomagnetic storm of 12 November 2025 over the American sector, with emphasis on the longitudinally asymmetric deformation, latitudinal expansion, and zonal drift reversal of equatorial plasma bubbles (EPBs).
G. A. S. Picanço, I. Galkin, P. Song, E. Astafyeva, L. C. A. Resende, J. P. Marchezi, L. A. da Silva, P. R. Fagundes, C. M. Denardini, C. Martinis, A. M. Santos, V. G. Pillat, A. J. Coster, A. L. Christovam, S. R. Laranja, M. A. M. Lopes   +15 more
wiley   +1 more source

Chip Formation Mechanisms When Cutting Amorphous Alloy with Cubic Boron Nitride Tools Based on Constitutive Equation Parameter Optimisation. [PDF]

Micromachines (Basel)
Du J, Wang D, Guo Y, Ming W, He W.
europepmc   +1 more source

Mechanical Properties and Cutting Performance of Si₃N₄/Sc₂W₃O₁₂ Composite Ceramic Tools Materials. [PDF]

Materials (Basel)
Zhang Z, Bai X, Zhang J, Yi M, Xiao G, Zhou T, Chen H, Chen Z, Xu C.   +8 more
europepmc   +1 more source

A machine vision based defect detection method for coated carbide CNC inserts and its industrial automation implementation analysis. [PDF]

Sci Rep
Hu J, Chen S, Yin S, Qiu S.
europepmc   +1 more source

Determination of the Minimum Uncut Chip Thickness of Ti-6Al-4V Titanium Alloy Based on Dead Metal Zone. [PDF]

Micromachines (Basel)
Zheng Y, Huang W, Liu Y, Duan P, Wang Y.
europepmc   +1 more source

Mechanisms and advances in field assisted machining of SiC. [PDF]

Int J Adv Manuf Technol
Wang P, Zhong W, Wang M, Zhao H, Wu W, Yan P, Zeng W, Jiang X.   +7 more
europepmc   +1 more source

Simulation Study on Residual Stress Distribution of Machined Surface Layer in Two-Step Cutting of Titanium Alloy. [PDF]

Materials (Basel)
Wang J, Kong B, Wei S, Zang J, Li A.
europepmc   +1 more source