Results 81 to 90 of about 120,559 (311)

Analytical Solutions for the Characteristic Size Distribution of the Elliptical Model in Fractured Rock Mass

, 2023
Fracture characteristics have a significant effect on the mechanical and hydraulic properties of rock mass. In this paper, before modeling a discrete fracture network, the fracture is simplified as a non-similar ellipse.
Chendi Lou, Zha, Ersheng, Zhang, Zetian, Lou, Chendi, Mingzhong Gao, Kun Xiao, Gao, Mingzhong., Ting Ai, Ai, Ting, Xiao, Kun, Xie, Jing, Ru Zhang, Ren, Li, Jing Xie, Ersheng Zha, Zhang, Ru, Zetian Zhang, Li Ren   +17 more
core   +1 more source

Facet‐Specific PbS Quantum Dot Passivation Using Halide Perovskites for SWIR Photodetectors

Advanced Materials Interfaces, EarlyView.
PbS quantum dots (QDs) are emerging as powerful short‐wave infrared photodetectors, yet the passivation mechanism of large QDs by perovskites ‐ critical for their stability ‐ remains unexplained. Here, we unveil the ligand structure of CH3NH3PbI3 (MAPI)‐passivated 4‐nm PbS QDs using FTIR, XPS, SEM, NMR, and DFT.
L. Paillardet, M. Gromova, D. Liu, A. S. Vasenko, O. V. Prezhdo, S. Alarab, G. De Paëpe, G. Lefevre, S. Charlot, O. Gourhant, B. Mortini, P. Reiss, J.‐M. Verilhac, D. Aldakov   +13 more
wiley   +1 more source

Investigation into the rock mass response to pillar extraction in a hard rock tabular mine

Historically, secondary pillar extraction has been successful in the soft rock mining environment. Several hard rock platinum mines have conducted selective remnant extraction with backfill as a regional support measure. A hard rock tabular platinum mine
Chikande, T.,, Onifade, M.,, Masethe, R.T.,, Firoozi, Ali, Moyo, S.,, Chikande, T., Adoko, A.C.,, Firoozi, A.A.,, Zvarivadza, Tawanda,, Masethe, Richard, Zvarivadza, Tawanda, Onifade, Moshood, Moyo, S., Adoko, Amoussou   +13 more
core   +1 more source

Geophysical characterization of an unstable rock mass [PDF]

, 2014
A pre-requisite in rock mass stability analysis is to obtain the internal structure and the mechanical properties of the investigated rock mass with a reasonable degree of uncertainty.
Colombero C., Comina C.
core  

Transducers Across Scales and Frequencies: A System‐Level Framework for Multiphysics Integration and Co‐Design

Advanced Materials Technologies, EarlyView.
Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu, Mengyao Xiao, Zhouli Sui, Yinpeng Wang, Daoye Zheng, Yuxin Liu, Luwei Wang, Huajun Liu, Chengkuo Lee   +8 more
wiley   +1 more source

The characterisation and analysis of in-situ and blasted block-size distributions and the blastability of rock masses.

, 1997
PhDIn this thesis, previous research on discontinuity geometry, in-situ block size distribution (IBSD), blasted block size distribution (BBSD), and blastability of rock mass is discussed.
Lu, Ping
core  

The Influence of Mesoscale Particle Structure on the Electrode Degradation and Resultant Electrochemistry of Lithium Ion Cells With Nickel Rich Lithium Nickel Manganese Cobalt Oxide Positive Electrodes

Advanced Materials Technologies, EarlyView.
Milled polycrystalline NMC811 cathode (MPC NMC) with smaller secondary particle and higher surface area had 1) greater cathode tortuosity, 2) reduced surface Ni on the cycled MPC cathodes consistent with surface reconstruction, and 3) increased Ni deposition from cathode‐anode crosstalk, manifesting in lower functional capacity and higher impedance ...
Edelmy J. Marin Bernardez, Andrew Nicoll, David J. Arnot, Armando Rodriguez Campos, Patrick J. Barry, Marie F. Millares, Cynthia Huang, Melissa A. Guercio, Grace K. Dono, Alexis Pace, Xianghui Xiao, Cherno Jaye, Conan Weiland, Jianming Bai, Hui Zhong, Michael Drakopoulos, Zhong Zhong, Nghia T. Vo, Xiao Tong, Esther S. Takeuchi, Amy C. Marschilok, Shan Yan, Kenneth J. Takeuchi   +22 more
wiley   +1 more source

Documenting rock mass failure with UAV during an emergency phase: Castell de Mur case study

, 2021
The understanding of the conditioning factors and of the mechanisms involved in rockfalls are requirements for a successful risk assessment and for the prevention of future events.
Corominas Dulcet, Jordi, Ruiz Carulla, Roger   +1 more
core   +1 more source

Numerical modeling of strain transfer from rock mass to a fibre optic sensor installed inside a grouted borehole

, 2012
, 2023Strain measurements in underground excavation are usually done locally, with extensometers or similar devices placed within 10-15 meters of adit or stope faces, mainly to gage development of the EDZ (excavation damaged zone) and assess its ...
Dusseault, M.B., Kaiser, P.K., Valley, Benoît, Madjdabadi, B.   +3 more
core  

Deterioration of excavated rockslopes : mechanisms, morphology and assessment [PDF]

, 2000
Results are reported of laboratory simulated weathering processes on a range of sedimentary rocks and the investigation of the deterioration of rock masses as observed on engineered and quarried rockslopes.
Nicholson, Dawn Theresa
core