Results 21 to 30 of about 34,086 (157)
Deep Underground Science and Engineering, EarlyView.Upon conceptualization of structural behavior, foundations in terms of their form are divided into linear (1D), planar (2D), and volumetric (3D). Regarding the load transfer mechanisms, linear foundation systems are considered vector‐acting, planar foundations are divided into section and surface‐acting, and volumetric ones are recognized as block ...
Abolfazl Eslami +4 more
wiley +1 more source
Early maturation processes in coal. Part 1: Pyrolysis mass balances and structural evolution of coalified wood from the Morwell Brown Coal seam [PDF]
Organic Geochemistry 40 (2009) 500-509, 2009 In this work, we develop a theoretical approach to evaluate maturation process of kerogen-like material, involving molecular dynamic reactive modeling with a reactive force field to simulate the thermal stress. The Morwell coal has been selected to study the thermal evolution of terrestrial organic matter.
arxiv +1 more source
Data‐driven analysis of the spatial dependence of grouting efficiency during tunnel excavation
Deep Underground Science and Engineering, EarlyView.Prediction of grouting efficiency using machine learning is enhanced by adopting a training strategy that accounts for the grouting process across multiple rounds. Abstract Grouting with water–cement mixtures is the most widely used and cost‐effective method for managing excess water inflow during tunnel construction.
Huaxin Liu, Xunchang Fei, Wei Wu
wiley +1 more source
Equilibration in the Aftermath of the Lunar-Forming Giant Impact [PDF]
K. Pahlevan, D. J. Stevenson, Equilibration in the aftermath of
the lunar-forming giant impact. Earth Planet. Sci. Lett. 262, 438 (2007), 2010 Simulations of the moon-forming impact suggest that most of the lunar material derives from the impactor rather than the Earth. Measurements of lunar samples, however, reveal an oxygen isotope composition that is indistinguishable from terrestrial samples, and clearly distinct from meteorites coming from Mars and Vesta.
arxiv +1 more source
Cold EI—The Way to Improve GC‐MS and Increase Its Range of Applications
Mass Spectrometry Reviews, EarlyView.ABSTRACT Gas chromatography‐mass spectrometry (GC‐MS) with Cold electron ionization (EI) is based on interfacing the GC and MS with a supersonic molecular beam (SMB) along with electron ionization of vibrationally cold sample compounds in the SMB in a contact‐free fly‐through ion source (hence the name Cold EI).
Aviv Amirav +3 more
wiley +1 more source
Efficient Spherical Harmonic Transforms aimed at pseudo-spectral numerical simulations [PDF]
Geochemistry, Geophysics, Geosystems, American Geophysical Union
(AGU), 2013, 14 (3), pp.751-758, 2012 In this paper, we report on very efficient algorithms for the spherical harmonic transform (SHT). Explicitly vectorized variations of the algorithm based on the Gauss-Legendre quadrature are discussed and implemented in the SHTns library which includes scalar and vector transforms.
arxiv +1 more source
Application for Determining Repeatability and Reproducibility in an Honest Gauge R&R Study
Quality and Reliability Engineering International, EarlyView.ABSTRACT The analysis of variance (ANOVA) method and the range method are employed to conduct gauge repeatability and reproducibility studies. While the range method does not account for the statistical nature of the data, unlike the ANOVA method, it is, on the one hand, faster and, on the other hand, simpler to implement.
Alban Petitjean, Olivier Musset
wiley +1 more source
Compatible $L_\infty$-algebras [PDF]
arXiv, 2021 A compatible $L_\infty$-algebra is a graded vector space together with two compatible $L_\infty$-algebra structures on it. Given a graded vector space, we construct a graded Lie algebra whose Maurer-Cartan elements are precisely compatible $L_\infty$-algebra structures on it.
arxiv
First in‐Vacuum In Situ X‐AFM/XRF/STXM Soft X‐Rays Combination Measurements and Characterization
X-Ray Spectrometry, EarlyView.ABSTRACT This manuscript details the advancements in developing a unique multimodal imaging setup, specifically the integration of X‐AFM on a synchrotron beamline that currently combines STXM and XRF. This triplet configuration operates within the soft x‐ray regime (< 2.5 keV) and necessitates high vacuum instrumentation, targeting sub‐micrometric ...
Aljoša Hafner +9 more
wiley +1 more source
Three-stage Formation of Cap Carbonates after Marinoan Snowball Glaciation Consistent with Depositional Timescales and Geochemistry [PDF]
Nat Commun 15, 7055 (2024)At least two global "Snowball Earth" glaciations occurred during the Neoproterozoic Era (1000-538.8 million years ago). Post-glacial surface environments during this time are recorded in cap carbonates: layers of limestone or dolostone that directly overlie glacial deposits.
arxiv +1 more source