Results 61 to 70 of about 141,212 (290)

Experimental Bounds on Masses and Fluxes of Nontopological Solitons [PDF]

, 2000
We have re-analyzed the results of various experiments which were not originally interested as searches for the Q-ball or the Fermi-ball. Based on these analyses, in addition to the available data on Q-balls, we obtained rather stringent bounds on flux ...
A. De Rújula, A. Kusenko, A. Kusenko, A. Kusenko, A. Kusenko, A. L. Macpherson, B. Holdom, B. Holdom, C. Caso, C. G. Callan, Jr., D. J. Ficenec, Donald E. Groom, E. K. Shirk, E. N. Alexeyev, E. Witten, G. D. Starkman, G. D. Starkman, Gilbert L. Cano, J. A. Phipps, J. Alcaraz, J. Arafune, J. Arafune, J. Derkaoui, J. Lindhard, J. R. Morris, K. Enqvist, K. N. Buckland, K. Nakamura, K. Ogure, M. Ambrosio, M. Axenides, P. B. Price, S. Coleman, S. Kasuya, S. Kasuya, S. Nakamura, S. Nakamura, S. Orito, T. Doke, T. Hara, T. Kajita, T. Yoshida, V. A. Rubakov, W. D. Wilson   +43 more
core   +2 more sources

Self‐Assembled Monolayers in p–i–n Perovskite Solar Cells: Molecular Design, Interfacial Engineering, and Machine Learning–Accelerated Material Discovery

Advanced Materials, EarlyView.
This review highlights the role of self‐assembled monolayers (SAMs) in perovskite solar cells, covering molecular engineering, multifunctional interface regulation, machine learning (ML) accelerated discovery, advanced device architectures, and pathways toward scalable fabrication and commercialization for high‐efficiency and stable single‐junction and
Asmat Ullah, Ying Luo, Stefaan De Wolf
wiley   +1 more source

Progress and trends in non-tool rock breaking theory and technology

Meitan xuebao
With the gradual implementation of China’s deep-earth engineering strategy, deep resource extraction and underground space construction have brought in some new opportunities, but they also face many challenges, with extreme geological conditions such as
Jianping WEI, Yubo CAI, Yong LIU, Dayang YU, Yi HUANG, Xing LI, Mengya GAO   +6 more
doaj   +1 more source

Evaluation and optimization of drilling efficiency while drilling based on improved rock-breaking specific energy model of bit

Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 2023
Abstract Rock-breaking specific energy model of bit is the key foundation of evaluation and optimization of downhole drilling condition, while some necessary parameters for the existing models is difficult to measure directly while drilling. Aiming to improve the accessibility and accuracy of the model, this study proposes and illustrates an ...
Weiqiang Song, Huidong Mu, Wenjuan Ji, Zhiqiang Zhao, Xu Han, Lulin Kong, Zhiwei Sun   +6 more
openaire   +2 more sources

Aspects of energy requirements for rock drilling [PDF]

, 1974
Development of laboratory rock breakage techniques to relate energy and surface area produced by slow compression, drop hammer and stamp mill. A detailed study of laboratory rotary-percussive drilling in a wide range of rocks under different ...
Wootton, David
core  

Optimal Radio Window for the Detection of Ultra-High-Energy Cosmic Rays and Neutrinos off the Moon [PDF]

, 2005
When high-energy cosmic rays impinge on a dense dielectric medium, radio waves are produced through the Askaryan effect. We show that at wavelengths comparable to the length of the shower produced by an Ultra-High Energy cosmic ray or neutrino, radio ...
A.G. de Bruyn, Abbasi, Achterberg, Alvarez-Muñiz, Alvarez-Muñiz, Askaryan, Askaryan, B. Stappers, Baars, Bahcall, Barwick, Bhattacharjee, Bhattacharjee, Bregman, Buniy, Butcher, Chiba, Dagkesamanskii, Deligny, Engel, Falcke, Falcke, Gandhi, Gerasimova, Gorham, Gorham, Gorham, Greisen, H. Falcke, Hankins, Heiken, Huege, J. Bacelar, Korotev, Kravchenko, Lehtinen, Medina-Tanco, O. Scholten, Olhoeft, Protheroe, R. Braun, R.G. Strom, Saltzberg, Saltzberg, Sarkar, Suprun, Takahashi, Takeda, Tamm, Ulrich, Yoshida, Zas, Zatsepin, Zatsepin   +53 more
core   +6 more sources

Anti‐Slip Material‐Based Strategies and Approaches

Advanced Materials Technologies, EarlyView.
This review highlights the principle mechanisms of slipping at the microscale, linking contact mechanics with a friction behavior model for surface interfaces. Main strategies to develop anti‐slip properties to the surfaces are discussed alongside standardized testing approaches.
Sogand Abbaspoor‐Zanjani, Carlo Antonini, Teresa Gatti, Mengjiao Wang   +3 more
wiley   +1 more source

Rock-Breaking Mechanism of Special-shaped PDC Cutter in Heterogeneous Granite

Shiyou jixie, 2022
In order to clarify the rock-breaking mechanism of special-shaped PDC cutter in the difficult-to-drill formations(e.g. granite), the finite element method was used to establish a mesoscopic heterogeneous granite model with different mineral components ...
Liu Hexing, Luo Yunxu, Liu Weiji, Ma Chuanhua, Wu Yanhui, Zhu Xiaohua, Liu Yaya   +6 more
doaj  

Comparative Study of the Rock-breaking Mechanism of a Disc Cutter and Wedge Tooth Cutter by Discrete Element Modelling

Chinese Journal of Mechanical Engineering, 2023
The operation of a shield tunnel boring machine (TBM) in a high-strength hard rock stratum results in significant cutter damage, adversely affecting the thrust and torque of the cutter head.
Hua Jiang, Huiyan Zhao, Xiaoyan Zhang, Yusheng Jiang, Yaofu Zheng   +4 more
doaj   +1 more source

On the puzzling feature of the silence of precursory electromagnetic emissions [PDF]

, 2013
It has been suggested that fracture-induced MHz-kHz electromagnetic (EM) emissions, which emerge from a few days up to a few hours before the main seismic shock occurrence permit a real-time monitoring of the damage process during the last stages of ...
Chelidze, T., Eftaxias, K., Potirakis, S. M.   +2 more
core   +2 more sources