Results 71 to 80 of about 75,511 (297)

Competition and cooperation:aspects of dynamics in sandpiles

, 2005
In this article, we review some of our approaches to granular dynamics, now well known to consist of both fast and slow relaxational processes. In the first case, grains typically compete with each other, while in the second, they cooperate.
Anita Mehta, Bagnold R A, Berg J, Bernal J D, Bollobas B, Brown R L, Caballero G, Coniglio A, Doi M, Edwards S F, Edwards S F, Edwards S F, Fukushima E, G C Barker, J M Berg, J M Luck, Kurchan J, Liu C H, Luck J M, Luck J M, Luck J M, Luck J M Mehta A, Marinari E, Mehta A, Mehta A, Mehta A, Mehta A, Mehta A, Mehta A, Mézard M, Reynolds O, Smoluchowski M V   +31 more
core   +1 more source

Nonequilibrium Phase Transitions in a Driven Sandpile Model [PDF]

, 1994
We construct a driven sandpile slope model and study it by numerical simulations in one dimension. The model is specified by a threshold slope $\sigma_c\/$, a parameter $\alpha\/$, governing the local current-slope relation (beyond threshold), and $j_ ...
Dhar S K, Ligget T M, R Pandit, S K Dhar, S Ramaswamy, Schmittmann B   +5 more
core   +2 more sources

Dynamic Testing of Cold Gas Sprayed Bipolar Plates–Porous Transport Layer Coating System in Proton Exchange Membrane Water Electrolysis

Advanced Engineering Materials, EarlyView.
Through direct application of porous transport layer (PTL) on the bipolar plate (BPP) with thermal spraying, the interfacial contact resistance is improved. With the cold gas sprayed BPP–PTL coating system, a proton exchange membrane water electrolysis cell with a cell voltage of Ucell = 1.9 V can be operated up to i = 2.5 A/cm2 in a dynamic mode ...
Kirsten Bobzin, Marvin Erck, Kevin Jasutyn, Katja Radermacher, Andreas Bund, Mario Kurniawan   +5 more
wiley   +1 more source

Calibration and Experimental Validation of Discrete Element Parameters for Long-Grain Rice with Different Moisture Contents Based on Repose Angle

Agriculture
The accurate determination of discrete element parameters is crucial for ensuring reliable results in simulating the critical post-harvest stages of rice grain (processing, transportation, and storage) with different moisture contents.
Zhengfa Chen, Gang Che, Lin Wan, Hongchao Wang, Kun Zhang   +4 more
doaj   +1 more source

Physical characterization of coffee after roasting and grinding

Semina: Ciências Agrárias, 2014
Flowability is an important characteristic of handling process for efficiency and reliability purpose of post-harvest operations, which are governed by the physical properties of the product.
Gabriel Henrique Horta de Oliveira , Paulo Cesar Corrêa , Fábio Lúcio Santos , Wander Luiz Vasconcelos o Santos , Carlito Calil Júnior , Fernanda Machado Baptestini , Guillermo Asdrúbal Vargas-Elías   +6 more
doaj   +1 more source

Packing Fractions and Maximum Angles of Stability of Granular Materials

, 2004
In two-dimensional rotating drum experiments, we find two separate influences of the packing fraction of a granular heap on its stability. For a fixed grain shape, the stability increases with packing fraction.
D. Bideau, J. Duran, J. Luo, J. Olson, J. R. L. Allen, M. Priester, O. Reynolds, R. J. Zieve, R. L. Brown, S. Chopra   +9 more
core   +1 more source

Raman Spectroscopic Identification of Oxide Phases in a Corroded MgO–Steel Composite Anode Used in Aluminum Molten Salt Electrolysis

Advanced Engineering Materials, EarlyView.
Micro‐Raman spectroscopy is applied to characterize corrosion products in a recycled‐based MgO–316L steel composite anode after molten salt electrolysis. A depth‐dependent Fe–O/Fe–Al–O layer sequence of magnetite, hercynite, and an Al‐doped magnetite transition zone is identified.
Felix Drechsler, Serhii Yaroshevskyi, Alexander Adamczyk, Mahnaz Mehdizadehlima, Julia Richter, Cameliu Himcinschi, David Rafaja, Alexandros Charitos, Christos G. Aneziris, Jens Kortus   +9 more
wiley   +1 more source

Calibration of Simulation Parameters for Fresh Tea Leaves Based on the Discrete Element Method

Agriculture
To address the problem of a lack of accurate parameters in the discrete element simulation study of the machine-picked fresh tea leaf mechanized-sorting process, this study used machine-picked fresh tea leaves as the research object, established discrete
Dongdong Li, Rongyang Wang, Yingpeng Zhu, Jianneng Chen, Guofeng Zhang, Chuanyu Wu   +5 more
doaj   +1 more source

Ripple and kink dynamics

, 2001
We propose a relevant modification of the Nishimori-Ouchi model [{\em Phys. Rev. Lett.} {\bf 71}, 197 (1993)] for granular landscape erosion. We explicitly introduce a new parameter: the angle of repose $\theta_r$, and a new process: avalanches.
A. Betat, A. Stegner, D. Goossens, H. Caps, H. Nishimori, J. Duran, N. Vandewalle, N. Vandewalle, R.A. Bagnold, R.B. Hoyle, R.S. Anderson, W. Landry   +11 more
core   +1 more source

Comparison of ibuprofen release from minitablets and capsules containing ibuprofen: β-Cyclodextrin complex [PDF]

, 2010
NOTICE: this is the author’s version of a work that was accepted for publication in European Journal of Pharmaceutics and Biopharmaceutics. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting ...
Amidon, Berggren, Brewster, Bugay, Carr, Cirri, Custodio, Dhareshwar, Engers, Fages, Fell, Frömming, Gil, H.M. Cabral-Marques, Higashi, J.F. Pinto, Khamar, Martin Del Valle, Miller, Mura, Ng, P.C. Costa, P.J. Salústio, Reddy, Rupp, Salústio, Sapkal, Sebhatu, Talari, Wu, Yamamura, Yano   +31 more
core   +1 more source