Results 141 to 150 of about 48,466 (293)

Seismic anisotropy and mantle dynamics beneath Maitri Station in central Dronning Maud Land, East Antarctica: new insights from shear wave splitting analysis of core-refracted and direct S-phases

Polar Research
To elucidate the Gondwana supercontinent, we investigate mantle dynamics in Dronning Maud Land, Antarctica, using shear wave splitting analysis. This involves 12 S-phase teleseismic events and 38 core refracted phase (SKS, SKKS, PKKS and PKS) events ...
K. Sivaram, V. Pavan Kumar, D. Srinivas
doaj   +1 more source

The damage and failure mechanism of prestatically loaded rock during medium‐strain rate cyclic impact loading

Deep Underground Science and Engineering, EarlyView.
Based on experimental results and theoretical analysis, an established rock damage accumulation model that comprehensively considers the preapplied static load, impact peak value, impact frequency, and impact times. Abstract To study the rock damage mechanism under high static loading and superimposed medium strain rate cyclic impact loading, a series ...
Wei Wang, Hanpeng Wang, Zicheng Wang, Xinyuan Xie, Yunhao Wu, Jinhou Zhang, Dekang Sun   +6 more
wiley   +1 more source

Exploring wave propagation behaviors in rock: A grain‐based perspective on mineral structures

Deep Underground Science and Engineering, EarlyView.
This study investigates wave propagation in rock at the grain scale using a grain‐based model, revealing that mineral elastic modulus significantly influences wave attenuation while grain size and distribution have limited effects. A novel peak particle velocity attenuation prediction model is proposed and validated for grain‐scale wave propagation ...
Zhiyi Liao, Jiachen Xu, Kai Zhang, Changtai Zhou   +3 more
wiley   +1 more source

Dynamic tensile strength and fracture evolution of characteristic shale with bedding and hole using linear regression theory

Deep Underground Science and Engineering, EarlyView.
The spiral conical perforations generated during methane in situ explosion fracturing operations lead to tensile fracture propagation in shale reservoirs being governed by the combined effects of impact pressure, bedding, and aperture under explosive loading. Using multiple regression analysis and digital image correlation technology, the mechanisms of
Yabo Chai, Ning Luo, Jianan Zhou, Haohao Zhang, Penglong Li, Yu Wang, Cheng Zhai, Tianran Ma   +7 more
wiley   +1 more source

Instability mechanism and failure characteristics of underground cavern in block system under the action of seismic waves

Deep Underground Science and Engineering, EarlyView.
Seismic waves with tensile stress, high amplitude, and low frequency are most likely to trigger block instability and sliding. Blocks with a single sliding surface are more prone to movement than those with multiple constraints, and roof‐positioned blocks are especially vulnerable to slide.
Xiao Wang, Jinxiao Liu, Gaoshuo Zhang, Wenxin Li, Changdi He   +4 more
wiley   +1 more source

Conservation of Angular Momentum in a Flux Qubit

, 2011
Oscillations of superconducting current between clockwise and counterclockwise directions in a flux qubit do not conserve the angular momentum of the qubit.
Chudnovsky, E. M., Garanin, D. A., O'Keeffe, M. F.   +2 more
core   +1 more source

Phonon‐Driven Insights Into Layer Sliding of High‐Voltage Layered Cathode

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Understanding the structural instability of high‐voltage layered cathodes remains a critical challenge in advancing sodium‐ion batteries. This work proposes a breathing‐shear mode coupling model based on the phonon spectrum, which elucidates the layer sliding mechanism in layered cathode materials by using interlayer spacing as the order parameter. The
Han Tang, Yingxin Huang, Valentina A. Bocharova, Xiaohui Rong, Ang Gao, Lin Gu, Yongsheng Hu   +6 more
wiley   +1 more source

Regulation of Oxygen Vacancies in High Entropy Oxides With Multi‐Layer Eggshell Architectural Framework for Boosting the Electrochemical Performance of Supercapacitors

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
An oxygen vacancy–rich FeZnCuCoNi high‐entropy oxide was constructed using a dual‐defect engineering strategy. This multi‐layer eggshell‐structured material delivers remarkable electrochemical performance, with high specific capacitance, excellent rate capability, and long‐term cycling stability even after 10 000 cycles.
Shunxiang Wang, Cuili Xiang, Yongjin Zou, Zexuan Yang, Lixian Sun, Hein‐Bernhard Kraatz   +5 more
wiley   +1 more source

Coherent Seismic Anisotropy Pattern Across Southern Africa Revealed by Shear Wave Splitting Measurements

Earth and Space Science
We report new PKS, SKS, and SKKS splitting measurements for 88 seismic stations in Namibia, Botswana, South Africa, and Mozambique. When combined with measurements from previous studies, the ensemble of measurements shows a fairly uniform NNE to NE (∼41°
Fenitra Andriampenomanana, Andrew Nyblade, Raymond Durrheim, Mark van derMeijde, Hanneke Paulssen, Motsamai Kwadiba, Onkgopotse Ntibinyane, Nortin Titus, Mako Sitali   +8 more
doaj   +1 more source

Subduction-controlled mantle flow and seismic anisotropy in South America [PDF]

, 2017
Faccenda, Manuele, Hu, Jiashun, Liu, Lijun   +2 more
core   +1 more source