Results 21 to 30 of about 187,233 (274)

Lost and found: the radial quantum number of Laguerre-Gauss modes [PDF]

, 2014
We introduce an operator linked with the radial index in the Laguerre-Gauss modes of a two-dimensional harmonic oscillator in cylindrical coordinates. We discuss ladder operators for this variable, and confirm that they obey the commutation relations of ...
Aiello, A., Boyd, R. W., de Guise, H., de la Hoz, P., Hradil, Z., Karimi, E., Leuchs, G., Rehacek, J., Sanchez-Soto, L. L.   +8 more
core   +3 more sources

Detection of the UV-vis silent biomarker trimethylamine-N-oxide via outer-sphere interactions in a lanthanide metal-organic framework

Communications Chemistry, 2022
Detection of trimethylamine N-oxide (TMAO) can allow for early intervention of cardiovascular disease, but is challenging to achieve using conventional materials and instruments owing to it being spectroscopically silent in the UV-visible region. Here, a
Hui Min, Zhonghang Chen, Zongsu Han, Kunyu Wang, Jun Xu, Wei Shi, Peng Cheng   +6 more
doaj   +1 more source

A quantum particle in a box with moving walls [PDF]

, 2013
We analyze the non-relativistic problem of a quantum particle that bounces back and forth between two moving walls. We recast this problem into the equivalent one of a quantum particle in a fixed box whose dynamics is governed by an appropriate time ...
Anza', Fabio, Di Martino, Sara, Facchi, Paolo, Kossakowski, Andrzej, Marmo, Giuseppe, Messina, Antonino, Militello, Benedetto, Pascazio, Saverio   +7 more
core   +2 more sources

Effects of corrective feedback on EFL speaking task complexity in China’s university classroom [PDF]

, 2018
Corrective feedback (CF) and task complexity are two important pedagogical topics in second language acquisition research in recent years, but there is few research investigating effects of CF on speaking task complexity in China’s university classroom ...
Gao, Xing, Zhai, Keyu
core   +2 more sources

N-doped ZrO2 nanoparticles embedded in a N-doped carbon matrix as a highly active and durable electrocatalyst for oxygen reduction

Fundamental Research, 2022
Fabricating highly efficient and robust oxygen reduction reaction (ORR) electrocatalysts is challenging but desirable for practical Zn-air batteries.
Xuejie Cao, Siyu Zheng, Tongzhou Wang, Fei Lin, Jinhong Li, Lifang Jiao   +5 more
doaj   +1 more source

Revealing the Formation of Recast Layer around the Film Cooling Hole in Superalloys Fabricated Using Electrical Discharge Machining

Metals, 2023
A film cooling hole is an efficient and reliable cooling method, which is widely used in aeroengine turbine blades to effectively improve the thrust–weight ratio of the engine.
Zenan Yang, Lu Liu, Jianbin Wang, Junjie Xu, Wanrong Zhao, Liyuan Zhou, Feng He, Zhijun Wang   +7 more
doaj   +1 more source

The role of extensive recasts in error detection and correction by adult ESL students

Studies in Second Language Learning and Teaching, 2016
Most of the laboratory studies on recasts have examined the role of intensive recasts provided repeatedly on the same target structure. This is different from the original definition of recasts as the reformulation of learner errors as they occur ...
Laura Hawkes, Hossein Nassaji
doaj   +1 more source

Reducing the impact of Auger recombination in quasi-2D perovskite light-emitting diodes

Nature Communications, 2021
Designing efficient perovskite light-emitting diodes remains a challenge due to the strong Auger recombination and resulting Joule heating. Here, the authors propose polarizable p-fluorophenethylammonium to generate quasi-2D perovskites with reduced ...
Yuanzhi Jiang, Minghuan Cui, Saisai Li, Changjiu Sun, Yanmin Huang, Junli Wei, Li Zhang, Mei Lv, Chaochao Qin, Yufang Liu, Mingjian Yuan   +10 more
doaj   +1 more source

Local and non-local equivalent potentials for p-12C scattering [PDF]

, 2000
A Newton-Sabatier fixed energy inversion scheme has been used to equate inherently non-local p-${}^{12}$C potentials at a variety of energies to pion threshold, with exactly phase equivalent local ones.
A. Lovell, B. Apagyi, D. R. Lun, F. Perey, H. Fiedeldey, H. Huber, H. Huber, H. Leeb, K. Amos, K. Chadan, K. E. May, M. A. Hooshyar, M. A. Hooshyar, M. Eberspächer, N. Alexander, P. C. Sabatier, P. J. Dortmans, P. J. Dortmans, P. J. Dortmans, P. K. Deb, R. Peierls, S. Karataglidis, S. Karataglidis, W. E. Frahn, W. E. Frahn   +24 more
core   +2 more sources

Modulating electrolyte structure for ultralow temperature aqueous zinc batteries

Nature Communications, 2020
Rechargeable aqueous batteries are promising for potential large-scale energy storage due to their high safety and low cost. Here the authors analyse a zinc chloride based low-temperature electrolyte for improving practicability of the aqueous batteries.
Qiu Zhang, Yilin Ma, Yong Lu, Lin Li, Fang Wan, Kai Zhang, Jun Chen   +6 more
doaj   +1 more source