Abstract The continuous convergence between the Indian and Eurasian plates caused massive lithospheric deformation in Tibetan Plateau led to excessive crustal material escaping through its southeastern margin. However, mechanisms that accommodate materials whether they intrude into Indochina Peninsula are continually under debate. Seismic Lg waves mostly propagate within crust waveguide with an amplitude decay is sensitive properties, such as temperature, partial melting, fracture....

The eastern margin of the Tibetan Plateau is an area with youngest uplift, strongest deformation, and frequent occurrence large earthquakes. Seismic velocity can constrain lithosphere's rheological strength crustal flow distribution, allowing deformation to be explored for crust upper mantle. However, seismic related rock composition reflects rock's elastic behavior. As a direct anelastic observation deep temperature strength, attenuation decrease multiplicity geodynamic interpretation. We...

The Alaskan mainland overlies the subducting Pacific plate and Yakutat microplate as they subduct beneath southern margin of North American plate. South-central Alaska features massive volcanoes different types, including intraplate volcanoes, Aleutian arc a group densely clustered called Wrangell volcanic field (WVF). How Denali gap (DVG) formed why are remain vigorously debated. Investigating crustal thermal structure can be crucial for understanding subsurface magmatic activity. Seismic...

Research Article| September 26, 2018 High‐Precision Relocation and Event Discrimination for the 3 2017 Underground Nuclear Explosion Subsequent Seismic Events at North Korean Test Site Xi He; He aKey Laboratory of Earth Planetary Physics, Institute Geology Geophysics, Chinese Academy Sciences, 19 Beitucheng West Road, Chaoyang District, Beijing 100029, China, zhaolf@mail.iggcas.ac.cnhexi@mail.iggcas.ac.cnyaozx@mail.iggcas.ac.cncAlso College University 100049, China. Search other works by...

Background Men who have sex with men (MSM) face significant risks of Chlamydia trachomatis (CT) and/or Neisseria gonorrhoeae (NG) infection. Nevertheless, only limited studies looked into the site-specific infection and clearance CT/NG. In order to prevent transmission, it is essential understand underlying factors that drive spontaneous clearance. Methods A 12-week cohort study examined association between CT/NG infection, self-clearance, sexual behaviors among MSM. The Willingness Service...

Abstract The Anatolian Plateau, currently experiencing rapid uplift and westward escape, records both the termination of oceanic subduction conversion to continental collision. crustal response transition environment from eastern western Anatolia can be inferred by seismic velocity attenuation structures. With this study, we construct a broadband Lg‐wave model for Plateau use it constrain lateral crust heterogeneities linked transition. Crustal Lg links late Cenozoic magmatism with...

Abstract This article examines the issue of copyright ownership for AI-generated content under China’s current law, with a particular focus on open-ended classification system introduced by 2020 Copyright Law amendment and its practical implications. marks shift in Chinese law from closed-list approach to an approach, thereby extending protection non-traditional works, such as content. Despite including catch-all provisions refining criteria work classification, ambiguities persist regarding...

Abstract South‐central Alaska features a history of massive volcanic activity. How the Denali gap (DVG) formed and why Wrangell volcanoes are clustered remain vigorously debated. Investigating crustal thermal structure can be crucial for understanding subsurface magmatic We present high‐resolution broadband Lg‐wave attenuation model to constrain anomalies beneath Alaska. Strong Lg is observed in south‐central Alaska, indicating possible melting crust. In contrast, central Yakutat terrane...

A kind of beam-splitting-based single-shot phase retrieval is proposed, where the transmitted field a sample to be observed diffracted into many replicas by Dammann grating and then incident on weakly scattering plate with known structure, exiting beams propagate roughly along their original directions form diffraction pattern array detector. All sub-diffraction patterns isolated each other were recorded single measurement, complex amplitude radiation accordingly from can iteratively...

ABSTRACT The applicability of the empirical magnitude–yield relations developed for northeast China and Korean Peninsula explosions was investigated data from northwest China. We collected regional broadband digital seismic 13 chemical (CEx) detonated between 6 September 10 October 2018, on eastern margin Junggar basin, China, five nuclear tests at Semipalatinsk test site, eight natural earthquakes. Both Lg Rayleigh-wave magnitudes (mb(Lg) Ms, respectively) were estimated these events....

Abstract The extension of back‐arc basins and formation marginal seas following the subduction oceanic lithosphere are usually attributed to rollback subducting slabs distorted mantle convection. However, for Japan Sea, largest sea in northwestern Pacific, its opening is unlikely only resulted from Pacific plate because coeval Philippine arcuate arc volcanic zone. Therefore, present‐day thermal structure uppermost mantle, which can be directly constrained by strong Pn‐wave attenuation, plays...

At 11:30 on September 3, 2017 (Beijing time), a strong earthquake occurred in Democratic People′s Republic of Korea (DPRK). International seismic monitoring agencies, e.g., the China Earthquake Network Center (CENC) and United States Geological Survey, suspected that it is an explosion. Based data from National Digital Seismic (CNDSN) Global (GSN), we investigated characteristics this event aftershock 8 min after main event. The P- S-wave excitation functions explosion sources are scaled...

The eastward expansion of the Tibetan Plateau has resulted in extensive seismic activities eastern Plateau, along with various types faulting processes across this region. However, crustal stress status related to these phenomena remains unclear. On 21 May 2021, Ms 6.4 Yangbi and 7.4 Maduo earthquakes diverse focal mechanisms occurred consecutively Chuandian Bayan Har blocks southern northern parts providing a distinct opportunity directly compare stresses both flanks laterally expanding...

A series of Eu 3 + -substituted Mn 0.65 Zn 0.35 Fe 2-x x O 4 ( = 0.00-0.04) nanoscaled ferrites were synthesized by a citrate sol-gel combustion processing. The effects 3+ substitution on the crystalline formation, microstructure and magnetic properties Mn-Zn ferrite annealing at temperature from 500°C to 800°C investigated. results showed that lattice parameter increased it contributed monophase spinel with addition x≤ 0.03. remanence coercive field but changed slightly in saturation...

PLZT (9/65/35) thin films on sapphire (001) substrates with thickness of 0.1 ~ 0.9 µm were prepared by a metal-organic decomposition (MOD) process. All the present highly (110)-preferred orientation independent film thickness. The microstructure was investigated. influence optical properties examined and analyzed. As is increased, absorption edge shifted to longer wavelength; band gap Eg increased slightly. refractive index at 510nm determined from transmission spectra also shows an...

Highly transparent lead lanthanum zirconate titanate (Pb 1−x La x )(Zr 0.65 Ti 0.35 ) 1-x/4 O 3 (x=0.096-0.1) electro-optic ceramics were prepared by the hot pressing method. The exhibited transparency as high 67% at 632.8nm (close to theoretical value). effects of substitution on phase structure, microstructure, dielectric, ferroelectric, optical and properties PLZT examined systematically. XRD results indicated that all compositions single perovskite phases, decreased lattice constant...

Lead lanthanum zirconate titanate (PLZT) transparent ceramics present an attractive electrically controlled light scattering performance with high transmittance and large contrast ratio. PLZT of 8 mole% different Zr/Ti ratios (Zr/Ti=68/32, 70/30, 72/28) were prepared by the hot pressing method to figure out influence performance. X-ray diffraction patterns confirm that all samples are perovskite structure no secondary impurity phase detected. All three compositions show double tending slim...

Sn wave, a regional seismic phase, propagates horizontally in the uppermost mantle and is sensitive to lateral variations lid thickness, temperature, melt. The physical properties of lithosphere can be indicated by propagation efficiency or attenuation. inefficient has been typically used describe regions with high-temperature anomalies infer subduction front Indian north Tibetan plateau. Here we collect 122,481 tangential-component digital seismograms, isolate geometric spreading...

Colossal and devastating earthquakes are typically associated with the slip rupture of fault zones. Fault zone imaging is challenging yet crucial to understand structure behavior, consequently hazard assessment mitigation. Seismic attenuation provides constraints on that independent seismic velocity imaging. Here, we image S-wave total (Qs) western part North Anatolian Zone (NAFZ) using data recorded by DANA (Dense Array for Anatolia) array. The area interest divided into three distinct...

By using a broadband Lg attenuation model developed for the Tibetan Plateau, we isolate source terms by removing and site effects from observed Lg-wave displacement spectra of M7.0 earthquake that occurred on August 8, 2017, in Jiuzhaigou, China, its aftershock sequence. Thus, parameters, including scalar seismic moment, corner frequency stress drop, these events can be further estimated. The estimated drops vary 47.1 kPa to 7149.6 kPa, with median value 59.4 most values falling between 50...

La-modified 0.75Pb (Mg 1/3 Nb 2/3 )O 3 -0.25PbTiO (PLMNT) electro-optic (EO) transparent ceramics were synthesized through a columbite precursor method. Excess PbO (10, 15 and 20 mol %) was added to study the effect on transparency, effect, microstructures of PLMNT ceramics. The phase structure different samples can be identified as single perovskite with no second detected. average grain size increased concentration excess from 10 mol% mol%. On contrary, transparency decreased increase PbO....

Lead lanthanum zirconate titanate (PLZT) transparent ceramics have attracted more and attentions for their unique electrically controlled light scattering effects. By the hot-press sintering method, a series of PLZT (X/70/30) with different La concentration (7.3, 7.4, 7.45, 7.5, 7.6 mole %) been synthesized to figure out its influence on performances. XRD patterns reveal formation single-phase perovskite structure all samples. The (7.3/70/30, 7.4/70/30, 7.45/70/30) samples exhibit...