Results 11 to 20 of about 7,660,135 (382)

Synthesized grain size distribution in the interstellar medium [PDF]

, 2012
We examine a synthetic way of constructing the grain size distribution in the interstellar medium (ISM). First we formulate a synthetic grain size distribution composed of three grain size distributions processed with the following mechanisms that govern the grain size distribution in the Milky Way: (i) grain growth by accretion and coagulation in ...
A Gauger, A Jones, AK Inoue, AK Inoue, B Hellyer, BD Savage, BT Draine, BT Draine, BT Draine, CF McKee, CJ Lada, CW Ormel, D Calzetti, D Yamasawa, E Dwek, F Hoyle, F Hoyle, H Hirashita, H Hirashita, H Hirashita, H Yan, JC Weingartner, JE O’Donnell, JEL Bishop, JS Mathis, K Liffman, L Mattsson, MAT Groenewegen, NC Wickramasinghe, RS Asano, S Bianchi, S Hofner, S Zhukovska, SH Kim, T Nozawa, T Nozawa, YC Pei   +36 more
arxiv   +5 more sources

THE MEASUREMENT OF GRAIN SIZE [PDF]

Journal of the Royal Microscopical Society, 1920
n ...
Zay Jeffries
openaire   +5 more sources

Atomic-scale modeling of the deformation of nanocrystalline metals [PDF]

, 1998
Nanocrystalline metals, i.e. metals with grain sizes from 5 to 50 nm, display technologically interesting properties, such as dramatically increased hardness, increasing with decreasing grain size. Due to the small grain size, direct atomic-scale simulations of plastic deformation of these materials are possible, as such a polycrystalline system can be
A. B. Lebedev, A. H. Chokshi, A. M. El-Sherik, A. Okabe, A. S. Clarke, C. S. Pande, D. Chen, D. G. Morris, D. H. Tsai, E. A. Stern, E. O. Hall, F. D. Di Tolla, F. F. Abraham, G. D’Agostino, G. E. Fougere, G. T. Gray III, G. W. Nieman, G. W. Nieman, H. Hahn, H. Hahn, H. Jónsson, H. Natter, H. Van Swygenhoven, H. Van Swygenhoven, H. Van Swygenhoven, H. Van Swygenhoven, H. Van Swygenhoven, H. Zhu, J. C. M. Li, J. F. Lutsko, J. Grilhe, J. Lian, J. R. Ray, J. R. Ray, J. R. Weertman, J. R. Weertman, J. Schiøtz, J. Schiøtz, J. Schiøtz, K. A. Gschneidner, K. Lu, K. S. Cheung, K. W. Jacobsen, K. W. Jacobsen, K. W. Jacobsen, L. H. Friedman, L. H. Friedman, M. D. Kluge, M. P. Allen, N. J. Petch, N. Wang, N. Wang, O. H. Nielsen, P. G. Sanders, P. G. Sanders, P. G. Sanders, P. G. Sanders, P. Keblinski, R. W. Siegel, R. W. Siegel, R. W. Siegel, R. Z. Valiev, S. J. Zhou, S. Kumar, S. Li, S. R. Agnew, S. R. Phillpot, S. R. Phillpot, T. D. Shen, T. Egami, T. G. Nieh, T. R. Malow, T. Rasmussen, T. Rasmussen, T. Vegge, T. Yamasaki, V. Bulatov, W. C. Swope, Z. Jiang   +78 more
arxiv   +7 more sources

Dust grain dynamics in C-Type shock waves in molecular clouds [PDF]

Mon.Not.Roy.Astron.Soc.371:513-529,2006, 2005
We investigate the role and behaviour of dust grains in C-type MHD shock waves in weakly ionized, dense molecular clouds. New shock models are presented for steady, oblique C-type shock structures with shock speed v_s=18km/s, n_H=10^5cm^-3, and a grain population represented by either a single grain species or a MRN grain size distribution.
Chapman, Jacqueline F., Wardle, Mark
arxiv   +3 more sources

Effects of the grain size and shape on the flow stress: A dislocation dynamics study [PDF]

, 2019
Dislocation dynamics simulation is used to investigate the effect of grain size and grain shape on the flow stress in model copper grains. We consider grains of 1.25-10 $\mu$m size, three orientations (<135>, <100> and <111>) and three shapes (cube, plate and needles).
Devincre, Benoit, Jiang, Maoyuan, Monnet, Ghiath   +2 more
arxiv   +3 more sources

A new method to determine the grain size of planetary regolith [PDF]

, 2012
Airless planetary bodies are covered by a dusty layer called regolith. The grain size of the regolith determines the temperature and the mechanical strength of the surface layers. Thus, knowledge of the grain size of planetary regolith helps to prepare future landing and/or sample-return missions.
Blum, Jürgen, Gundlach, Bastian
arxiv   +4 more sources

Grain size segregation in debris discs [PDF]

Astronomy & Astrophysics, 2013
In most debris discs, dust grain dynamics is strongly affected by stellar radiation pressure. As this mechanism is size-dependent, we expect dust grains to be spatially segregated according to their sizes. However, because of the complex interplay between radiation pressure, collisions and dynamical perturbations, this spatial segregation of the ...
Philippe Thebault, Quentin Kral, Jean-Charles Augereau   +2 more
openaire   +6 more sources

The influence of dust grain porosity on the analysis of debris disc observations [PDF]

, 2016
Debris discs are often modelled assuming compact dust grains, but more and more evidence for the presence of porous grains is found. We aim at quantifying the systematic errors introduced when modelling debris discs composed of porous dust with a disc model assuming spherical, compact grains.
Brunngräber, Robert, Ertel, Steve, Kirchschlager, Florian, Wolf, Sebastian   +3 more
arxiv   +3 more sources

Impact of grain size distributions on the dust enrichment in high-redshift quasars [PDF]

, 2012
In high-redshift ($z>5$) quasars, a large amount of dust ($\textstyle\sim 10^{8} \mathrm{M}_{\sun}$) has been observed. In order to explain the large dust content, we focus on a possibility that grain growth by the accretion of heavy elements is the dominant dust source.
Asano, Bianchi, Draine, Dwek, Fukui, Gall, Gallerani, Gao, Gauger, Groenewegen, Hirashita, Hirashita, Hirashita, Hiroyuki Hirashita, Inoue, Inoue, Juarez, Klessen, Koda, Lodders, Maiolino, Mathis, Matsuoka, Mattsson, McKee, Michałowski, Nozawa, Pei, Pipino, Riechers, Tzu-Ming Kuo, Umeda, Valiante, Valiante, Yan, Zhukovska   +35 more
arxiv   +3 more sources

The Strength–Grain Size Relationship in Ultrafine-Grained Metals [PDF]

Metallurgical and Materials Transactions A, 2016
Metals processed by severe plastic deformation (SPD) techniques, such as equal-channel angular pressing (ECAP) and high-pressure torsion (HPT), generally have submicrometer grain sizes. Consequently, they exhibit high strength as expected on the basis of the Hall–Petch (H–P) relationship.
Balasubramanian, N., Langdon, Terence G.
openaire   +5 more sources