Results 51 to 60 of about 7,660,135 (382)
Influence of grain growth on the thermal structure of protoplanetary discs
, 2020 The thermal structure of a protoplanetary disc is regulated by the opacity that dust grains provide. However, previous works have often considered simplified prescriptions for the dust opacity in hydrodynamical disc simulations, e.g.
Bitsch, Bertram +2 more
core +1 more source
GRAIN SIZE CHART OF URANIUM [PDF]
, 1951 Abstract : The metallurgist who is familiar with uranium is aware that the metallographic study of the metal has been complicated by certain factors. Of these factors, two, namely, the anisotropic crystal structure and the presence of the so-called beta 'ghost' grains, have made accurate and rapid grain-size determinations, by comparison with existing ...
Saller, H. A. +2 more
openaire +3 more sources
Journal of Rock Mechanics and Geotechnical Engineering, 2021 Grain size effect on rock strength is a topic of great interest in geotechnical engineering. A consensus obtained from earlier laboratory tests is that rock strength generally decreases with the increase of grain size for both silicate and carbonate ...
Jun Peng +2 more
doaj
What determines the grain size distribution in galaxies? [PDF]
, 2013 We construct a dust evolution model taking into account the grain size distribution, and investigate what kind of dust processes determine the grain size distribution at each stage of galaxy evolution. In addition to the dust production by type II supernovae (SNeII) and asymptotic giant branch (AGB) stars, we consider three processes in the ISM: (i ...
arxiv +1 more source
X-ray Halos and Large Grains in the Diffuse Interstellar Medium [PDF]
, 2001 Recent observations with dust detectors on board the interplanetary spacecraft Ulysses and Galileo have recorded a substantial flux of large interstellar grains with radii between 0.25 and 2.0 mu entering the solar system from the local interstellar ...
Adolf N. Witt +11 more
core +2 more sources
Journal of Materials Research and Technology, 2022 In order to probe the superior nano/micron scale mechanical behaviors of ultra-fine grain (UFG) austenitic stainless steel as compared with coarse grain (CG) counterpart, systematic nanoindentation tests were carried out together with post-mortem EBSD ...
Rui Ke +4 more
doaj
Progress in Earth and Planetary Science, 2023 Polymodal particle size distributions are generally analyzed by separating them into lognormal distributions, but estimating the precise number of lognormal components required remains a considerable problem.
Naofumi Yamaguchi
doaj +1 more source
Effect of grain size distribution and size-dependent grain heating on molecular abundances in starless and pre-stellar cores [PDF]
A&A 640, A94 (2020), 2020 We present a new gas-grain chemical model to constrain the effect of grain size distribution on molecular abundances in starless and pre-stellar cores. We introduce grain-size dependence simultaneously for cosmic-ray (CR)-induced desorption efficiency and for grain equilibrium temperatures.
arxiv +1 more source
Molecular Oncology, EarlyView.Low expression of five purine metabolism‐related genes (ADSL, APRT, ADCY3, NME3, NME6) was correlated with poor survival in colorectal cancer. Immunohistochemistry analysis showed that low NME3 (early stage) and low ADSL/NME6 (late stage) levels were associated with high risk.
Sungyeon Kim +8 more
wiley +1 more source
Understanding Specimen- and Grain-Size Effects on Nanoscale Plastic Deformation Mechanisms and Mechanical Properties of Polycrystalline Yttria-Stabilized Tetragonal Zirconia Nanopillars [PDF]
European Journal of Mechanics - A/Solids 76 (2019) 80-90, 2018 Specimen- and grain-size effects on nanoscale plastic deformation mechanisms and mechanical properties of polycrystalline yttria-stabilized tetragonal zirconia (YSTZ) nanopillars are studied by molecular dynamics simulations. Through uniaxial compression of YSTZ columnar nanopillars, intergranular and transgranular deformation mechanisms are ...
arxiv +1 more source