Results 81 to 90 of about 81,279 (338)

Possible Stratification Mechanism in Granular Mixtures

, 1998
We propose a mechanism to explain what occurs when a mixture of grains of different sizes and different shapes (i.e. different repose angles) is poured into a quasi-two-dimensional cell.
H. A. Makse, H. Eugene Stanley, H. M. Jaeger, Hernán A. Makse, J. A. C. Gallas, J. C. Williams, J.-P. Bouchaud, P.-G. de Gennes, Pierre Cizeau, R. A. Bagnold, R. L. Brown, T. Boutreux   +11 more
core   +1 more source

Cu‐Based MOF/TiO2 Composite Nanomaterials for Photocatalytic Hydrogen Generation and the Role of Copper

Advanced Functional Materials, EarlyView.
HKUST‐1/TiO2 composite materials show a very high photocatalytic hydrogen evolution rate which increases as a function of the irradiation time until reaching a plateau and even surpasses the performance of the 1%Pt/TiO2 material after three photocatalytic cycles.
Alisha Khan, Marie Le Pivert, Alireza Ranjbari, Diana Dragoe, Daniel Bahena‐Uribe, Christophe Colbeau‐Justin, Christian Herrero, Dorota Rutkowska‐Zbik, Johnny Deschamps, Hynd Remita   +9 more
wiley   +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

Micropatterned Biphasic Printed Electrodes for High‐Fidelity on‐Skin Bioelectronics

Advanced Functional Materials, EarlyView.
Micropatterned biphasic printed electrodes achieve unprecedented skin conformity and low impedance by combining liquid‐metal droplets with microstructured 3D lattices. This scalable approach enables high‐fidelity detection of ECG, EMG, and EEG signals, including alpha rhythms from the forehead, with long‐term comfort and stability.
Manuel Reis Carneiro, Telmo Lopes, André F. Silva, Carmel Majidi, Mahmoud Tavakoli   +4 more
wiley   +1 more source

Effect of clay content on the shear strength of clay–sand mixture

International Journal of Geo-Engineering, 2018
This paper investigates the effect of clay content on the shear strength of clay–sand mixtures. Bentonite and Jumunjin sand were mixed to prepare clay–sand mixtures with varying clay contents of 5, 10, 15, 20, 25 and 30%.
Donghwi Kim, Boo Hyun Nam, Heejung Youn
doaj   +1 more source

Janssen effect and the stability of quasi 2-D sandpiles

, 2010
We present the results of three dimensional molecular dynamics study of global normal stresses in quasi two dimensional sandpiles formed by pouring mono dispersed cohesionless spherical grains into a vertical granular Hele-Shaw cell.
D. Frenkel, Fatemeh Ebrahimi, Hamed Maleki, R. M. Neddermam, Tahereh Azizpour   +4 more
core   +1 more source

Reconfigurable Three‐Dimensional Superconducting Nanoarchitectures

Advanced Functional Materials, EarlyView.
3D superconducting nanostructures offer new possibilities for emergent physical phenomena. However, fabricating complex geometries remains challenging. Here 3D nanoprinting of complex 3D superconducting nanoarchitectures is established. As well as propagating superconducting vortices in 3D, anisotropic superconducting properties with geometric ...
Elina Zhakina, Luke Alexander Turnbull, Weijie Xu, Markus König, Paul Simon, Wilder Carrillo‐Cabrera, Amalio Fernández‐Pacheco, Uri Vool, Dieter Suess, Claas Abert, Vladimir M. Fomin, Claire Donnelly   +11 more
wiley   +1 more source

Determination of the Dynamic Angle of Repose of Lunar Regolith Simulants

Geosciences
The determination of the dynamic angle of repose (DAR) of lunar regolith simulants is essential for modeling material behavior during in situ resource utilization (ISRU) processes and lunar surface operations.
Mateusz Pawłowski, Damian Pietrusiak, Jakub Wróbel, Janusz Kozubal   +3 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

Stratification Instability in Granular Flows

, 1998
When a mixture of two kinds of grains differing in size and shape is poured in a vertical two-dimensional cell, the mixture spontaneously stratifies in alternating layers of small and large grains, whenever the large grains are more faceted than the ...
A. Mehta, A. Rosato, E. Clément, F. Cantelaube, H. A. Makse, H. A. Makse, H. J. Herrmann, H. K. Pak, H. M. Jaeger, H. M. Jaeger, H. M. Jaeger, Hernán A. Makse, J. A. Drahun, J. B. Knight, J. C. Williams, J. C. Williams, J. Duran, J. L. Borges, J.-P. Bouchaud, J.-P. Bouchaud, O. Zik, P. Meakin, R. A. Bagnold, R. A. Bagnold, R. A. Bagnold, R. L. Brown, S. F. Edwards, S. Savage, T. Boutreux, W. Cooke   +29 more
core   +1 more source