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We obtained likelihoods in the lower mantle for long-wavelength models of bulk sound and shear wave speed, density, and boundary topography, compatible with gravity constraints, from normal mode splitting functions and surface wave data. Taking into account the large uncertainties in Earth's thermodynamic reference state and the published range of mineral(More)
We present an application of entropy production as an abstraction tool for complex processes in geodynamics. Geodynamic theories are generally based on the principle of maximum dissipation being equivalent to the maximum entropy production. This represents a restriction of the second law of thermodynamics to its upper bound. In this paper, starting from the(More)
Mining activities are among the major culprits of the wide occurrences of soil and water pollution by PAHs in coal district, which have resulted in ecological fragilities and health risk for local residents. Sixteen PAHs in multimedia environment from the Heshan coal district of Guangxi, South China, were measured, aiming to investigate the contamination(More)
This paper describes a scientific workflow for <i>ab initio</i> calculations of elastic coefficients (<i>Cij</i>) of crystalline materials implemented in the <i>VLab</i> Cyberinfrastructure [da Silveira et al., 2008]. This workflow has recently been upgraded to treat crystals of all symmetries and integrated in the XSEDE. First we review the underlying(More)
The subject of non-equilibrium thermodynamics is now quite old, dating back to Prigogine, Biot and Truesdell in the 1950's and 1960's. It has had a resurgence in the physical sciences in the past five years largely due to a consolidation of ideas on thermodynamics as a whole and to advances in computer speeds. Non-equilibrium thermodynamics has now advanced(More)
We present a novel mechanical model for the extraction of outer core material upwards across the CMB into the mantle side region of D and subsequent interaction with the post-perovskite (ppv) phase transition. A strong requirement of the model is that the D region behaves as a poro-viscoelastic granular material with dilatant properties. Using new ab-initio(More)
We investigate the use of the Multipole-accelerated Boundary Element Method (BEM) and of the Singularity Method for studying the interaction of many bubbles rising in a volcanic conduit. Observation shows that the expression of volcanic eruption is extremely variable, from slow release of magma to catastrophic explosive manifestation. We investigate the(More)
Keywords: seismic tomography hydrous minerals Wilson cycle subduction subduction initiation S velocity North America Atlantic Ocean dehydration transition zone We investigate a weak, but persistent low S-velocity anomaly in the upper mantle beneath the US East Coast. This anomaly sits above the high-velocity lower-mantle S-velocity structure generally(More)
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