Vs30 Mapping and Soil Classification in Tiznit Region Based On H/V Spectral Ration Method by Cherki Fadoua, Tadili Mehdi, Tadili Benaissa, Mhammdi Nadia

“…As part of the seismic risk assessment in the Tiznit region, ambient noise recordings were made during the geophysical investigation campaign using the (H/V) method. …”
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2D Model Study of CO2 Plumes in Saline Reservoirs by Borehole Resistivity Tomography by Said A. al Hagrey

“…The later arrays are also more susceptible to telluric noise but have a lower level of measurement errors. …”
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Experimental Investigation of the Use of Expansive Materials to Increase Permeability in Coal Seams through Expansive Fracturing by Xiao Cui, Jiayong Zhang, Liwen Guo, Xuemin Gong

“…Based on these results, it is feasible that hydration reactions of expansive materials could increase both gas drainage and permeability in coal seams, thus reducing the risk of rock burst around boreholes in coal seams.…”
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Investigation of Anisotropic Behavior and Statistical Evolution of Acoustic Emission Energy during the Deformation of Layered Sandstone by Shujian Li, Shaobin Dong, Binting Cai, Menglai Wang, Yanhong Xie, Jingguo Luo

“…The results of statistical evolution of acoustic emission energy showed that the b value, the effective power-law exponent, and the optimal exponent could be used as monitoring indexes for the rock mass stability. With the progress of the experiment, the following phenomena pertaining to acoustic emission activities occurred, which may indicate imminent danger of collapse: (1) the crackling noises increased significantly; (2) the variation of the b value exhibited a significant downward trend; and (3) the effective power-law exponent and the optimal exponent changed in different stages and gradually decreased as the final failure was approached. …”
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The First Seismic Imaging of the Holy Cross Fault in the Łysogóry Region, Poland by Eslam Roshdy, Artur Marciniak, Rafał Szaniawski, Mariusz Majdański

“…Precise data processing, including static corrections and noise attenuation, significantly enhanced signal-to-noise ratio and seismic resolution. …”
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Continuous underground observation of the geomagnetic field in Xuzhou City, North China, and its time-varying characteristics by Mei Han, Mei Han, Lianghui Guo, Lianghui Guo, Lianghui Guo, Yun Wang, Yun Wang, Xiang Wang, Xiang Wang

“…Our achievements are as follows: 1) the underground geomagnetic environment has the advantage of being stable and clean with a low level of background noise and thus is suitable for high-precision, long-term, and continuous observation of the geomagnetic field; 2) the variation of the geomagnetic field underground is well coupled with that on the ground, with minor differences primarily attributed to an induced magnetic field generated in the surrounding rocks by the external magnetic-field variation; 3) underground geomagnetic observation can clearly record rich time-varying information of the geomagnetic field including calm variation, magnetic storms, geomagnetic pulsations and so on. …”
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Influence of Error in Estimating Anisotropy Parameters on VTI Depth Imaging by S. Y. Moussavi Alashloo, D. P. Ghosh, Y. Bashir, W. Y. Wan Ismail

“…Thin layers in sedimentary rocks lead to seismic anisotropy which makes the wave velocity dependent on the propagation angle. …”
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CALCULATION AND SIMULATION OF THE CLEARANCE FOR FLEXIBLE HIGH-SPEED BEATING-UP SYSTEM CONSIDERING RESISTANCE EFFECT by QIU HaiFei

“…The beating-up resistance from sley was transformed into an equivalent torque on rocking shaft by use of step function. The results of contact dynamics simulation with different clearance states show that there are obvious differences between flexible body simulation and rigid body simulation, and the former can better reflect the real situation of beating-up; The clearance of 0.03 mm and 0.06 mm has a great influence on sley vibration which is not conducive to reduce vibration and noise for loom system; 0.09 mm clearance will not only cause high-frequency reaction force on main shaft bearing, but also aggravate contact and collision between crank and connecting rod; There are many overlaps between centroid trajectory of flexible main shaft with clearance and ideal trajectory, because of that, multi-point contact collision occurs in the crank bearing. …”
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Integrative analysis of the Aachen geothermal system (Germany) with an interdisciplinary conceptual model by Esteban Gómez-Díaz, Andrea Balza Morales, Peter A. Kukla, Maren Brehme

“…The model characterizes a non-magmatic, detachment fault-controlled convective thermal system, wherein the reservoir exhibits mixed properties of the mainly Devonian carbonate rocks. NW–SE directed fault lines play a pivotal role in fluid transport, enabling the ascent of thermal waters without the need for additional energy. …”
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