Slab ≈ Slab
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A Rigorous Method of Calculating Exfoliation Energies from First Principles Open
The exfoliation energy, the energy required to peel off an atomic layer from the surface of a bulk material, is of fundamental importance in the science and engineering of two-dimensional materials. Traditionally, the exfoliation energy of…
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First-principles Green's-function method for surface calculations: A pseudopotential localized basis set approach Open
We present an efficient implementation of a surface Green's-function method\nfor atomistic modeling of surfaces within the framework of density functional\ntheory using a pseudopotential localized basis set approach. In this method,\nthe s…
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Continental versus oceanic subduction zones Open
Subduction zones are tectonic expressions of convergent plate margins, where crustal rocks descend into and interact with the overlying mantle wedge. They are the geodynamic system that produces mafic arc volcanics above oceanic subduction…
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Water Dielectric Effects in Planar Confinement Open
We investigate the dielectric profile of water confined between two planar polar walls using atomistic molecular dynamics simulations. For a water slab thickness below 1 nm the dielectric response is highly asymmetric: while the parallel c…
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Subduction-transition zone interaction: A review Open
As subducting plates reach the base of the upper mantle, some appear to flatten and stagnate, while others seemingly go through unimpeded. This variable resistance to slab sinking has been proposed to affect long-term thermal and chemical …
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Raising the Gangdese Mountains in southern Tibet Open
The surface uplift of mountain belts is in large part controlled by the effects of crustal thickening and mantle dynamic processes (e.g., lithospheric delamination or slab breakoff). Understanding the history and driving mechanism of uplif…
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TX2019slab: A New <i>P</i> and <i>S</i> Tomography Model Incorporating Subducting Slabs Open
Large numbers of earthquakes occur in subduction zones that are marked by dipping, narrow high seismic velocity slabs. The existence of these fast velocity slabs can cause serious earthquake mislocation problems that can bias estimates of …
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Teleseismic P‐wave tomography and mantle dynamics beneath Eastern Tibet Open
We determined a new 3-D P-wave velocity model of the upper mantle beneath eastern Tibet using 112,613 high-quality arrival-time data collected from teleseismic seismograms recorded by a new portable seismic array in Yunnan and permanent ne…
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Force‐Deformation Study on Glass Fiber Reinforced Concrete Slab Incorporating Waste Paper Open
This study inspects the viability of engaging the discarded paper wastes in concrete by varying the volume proportions from 0%–20% with each 5% increment in replacement of the weight of cement. A physiomechanical study was conducted, and t…
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Morphology of seismically slow lower-mantle structures Open
Large low shear velocity provinces (LLSVPs), whose origin and dynamic implication remain enigmatic, dominate the lowermost mantle. For decades, seismologists have created increasingly detailed pictures of the LLSVPs through tomographic mod…
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Detection of Structural Components in Point Clouds of Existing RC Bridges Open
The cost and effort of modeling existing bridges from point clouds currently outweighs the perceived benefits of the resulting model. There is a pressing need to automate this process. Previous research has achieved the automatic generatio…
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Surface Wave Tomography of the Alps Using Ambient‐Noise and Earthquake Phase Velocity Measurements Open
A large data set of surface wave phase velocity measurements is compiled to study the structures of the crust and upper mantle underneath the Alpine continental collision zone. Records from both ambient‐noise and earthquake‐based methods a…
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The Himalaya in 3D: Slab dynamics controlled mountain building and monsoon intensification Open
© 2017 Geological Society of America. Tectonic models for the Oligocene-Miocene development of the Himalaya mountain range are largely focused on crustal-scale processes, and developed along orogen-perpendicular cross sections. Such models…
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Zero-Index Bound States in the Continuum Open
Metamaterials with an effective zero refractive index associated with their electromagnetic response are sought for a number of applications in communications and nonlinear optics. A promising way that this can be achieved in all-dielectri…
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Accurate Neural Network Description of Surface Phonons in Reactive Gas–Surface Dynamics: N<sub>2</sub> + Ru(0001) Open
Ab initio molecular dynamics (AIMD) simulations enable the accurate description of reactive molecule-surface scattering especially if energy transfer involving surface phonons is important. However, presently, the computational expense of …
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Total absorption of light in monolayer transition-metal dichalcogenides by critical coupling Open
Transition-metal dichalcogenides with exceptional electrical and optical properties have emerged as a new platform for atomic-scale optoelectronic devices. However, the poor optical absorption resists their potential applications. The nove…
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Fresnel coefficients of a two-dimensional atomic crystal Open
In general the experiments on the linear optical properties of a single-layer\ntwo-dimensional atomic crystal are interpreted by modeling it as a homogeneous\nslab with an effective thickness. Here I fit the most remarkable experiments in\…
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Automated crack detection and crack depth prediction for reinforced concrete structures using deep learning Open
Automatic inspection for crack detection and estimation of the crack depth is critical in assessing the damage and determining the appropriate method of repair in concrete structures. Most of the studies which have employed deep learning m…
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Cold deep subduction recorded by remnants of a Paleoproterozoic carbonated slab Open
The absence of low-thermal gradients in old metamorphic rocks (<350 °C GPa −1 ) has been used to argue for a fundamental change in the style of plate tectonics during the Neoproterozoic Era. Here, we report data from an eclogite xenolith i…
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Continuity of the Alpine slab unraveled by high‐resolution <i>P</i> wave tomography Open
The question of lateral and/or vertical continuity of subducted slabs in active orogens is a hot topic partly due to poorly resolved tomographic data. The complex slab structure beneath the Alpine region is only partly resolved by availabl…
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Isotopic evidence for iron mobility during subduction Open
Subduction zones are one of the most important sites of chemical interchange between the Earth's surface and interior. One means of explaining the high Fe3+/ΣFe ratios and oxidized nature of primary arc magmas is the transfer of sulfate (S…
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Snow fracture in relation to slab avalanche release: critical state for the onset of crack propagation Open
The failure of a weak snow layer buried below cohesive slab layers is a necessary, but insufficient, condition for the release of a dry-snow slab avalanche. The size of the crack in the weak layer must also exceed a critical length to prop…
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Seismicity Structure of the Northern Chile Forearc From >100,000 Double‐Difference Relocated Hypocenters Open
In this study, we present high‐resolution seismicity images of the northern Chile subduction zone forearc. We used 8 years of continuous seismic waveform data from the Integrated Plate Boundary Observatory Chile network and auxiliary stati…
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Ultrahigh-Q photonic crystal nanocavities based on 4H silicon carbide Open
Photonic nanocavities with high quality (Q) factors are essential components for integrated optical circuits. The use of crystalline silicon carbide (SiC) for such nanocavities enables the realization of devices with superior properties. W…
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Proto-South China Sea Plate Tectonics Using Subducted Slab Constraints from Tomography Open
The past size and location of the hypothesized proto-South China Sea vanished ocean basin has important plate-tectonic implications for Southeast Asia since the Mesozoic. Here we present new details on proto-South China Sea paleogeography …
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A Novel Feature Selection Approach Based on Tree Models for Evaluating the Punching Shear Capacity of Steel Fiber-Reinforced Concrete Flat Slabs Open
When designing flat slabs made of steel fiber-reinforced concrete (SFRC), it is very important to predict their punching shear capacity accurately. The use of machine learning seems to be a great way to improve the accuracy of empirical eq…
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Flexural Strengthening of Two-Way RC Slabs with Textile-Reinforced Mortar: Experimental Investigation and Design Equations Open
The application of textile-reinforced mortar (TRM) as a means of increasing the flexural capacity of two-way reinforced concrete (RC) slabs is experimentally investigated in this study. The parameters examined include the number of TRM lay…
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Analysis of potential use of fibre reinforced recycled aggregate concrete for sustainable pavements Open
Fibre reinforced concrete (FRC) has advantages, such as minimizing cracking, increasing the composite absorption of energy and enhancing the residual strength. At the same time, the demand for sustainability led to the development of using…
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On the consistency of seismically imaged lower mantle slabs Open
The geoscience community is increasingly utilizing seismic tomography to interpret mantle heterogeneity and its links to past tectonic and geodynamic processes. To assess the robustness and distribution of positive seismic anomalies, infer…
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Estimating the effective elastic modulus and specific fracture energy of snowpack layers from field experiments Open
Measurements of the mechanical properties of snow are essential for improving our understanding and the prediction of snow failure and hence avalanche release. We performed fracture mechanical experiments in which a crack was initiated by …