Results 11 to 20 of about 15,294 (116)

Quasi-regular variations of subpulse drifting for PSR J1857+0057 [PDF]

Monthly notices of the Royal Astronomical Society, 2023
During observations of the Galactic Plane Pulsar Snapshot (GPPS) survey by the Five-hundred-meter Aperture Spherical radio Telescope (FAST), varying subpulses drifting of PSR J1857+0057 is detected.
Yisheng Yan, J. L. Han, C. Wang, P. F. Wang   +3 more
semanticscholar   +1 more source

From regular black holes to horizonless objects: quasi-normal modes, instabilities and spectroscopy [PDF]

Journal of Cosmology and Astroparticle Physics, 2023
We study gravitational and test-field perturbations for the two possible families of spherically symmetric black-hole mimickers that smoothly interpolate between regular black holes and horizonless compact objects accordingly to the value of a ...
Edgardo Franzin, Stefano Liberati, Vania Vellucci   +2 more
semanticscholar   +1 more source

An Insight-HXMT View of the mHz Quasi-regular Modulation Phenomenon in the Black Hole X-Ray Binary 4U 1630–47 [PDF]

Astrophysical Journal, 2022
Here we report the spectral-timing results of the black hole X-ray binary 4U 1630–47 during its 2021 outburst using observations from the Hard X-ray Modulation Telescope (Insight-HXMT).
Zi-Xu Yang, Liang Zhang, Yue Huang, Qing-cui Bu, Zhen Zhang, Hengjun Liu, Wei Yu, Peng Wang, Q. Zhao, L. Tao, J. Qu, Shu Zhang, S. Zhang, Liming Song, F. Lu, Xue-lei Cao, Li Chen, C. Cai, Z. Chang, Tianxiang Chen, Yong Chen, Yupeng Chen, Yibao Chen, W. Cui, G. Ding, Yu Du, G. Gao, He Gao, M. Ge, Yudong Gu, J. Guan, Cheng-Cheng Guo, Dawei Han, J. Huo, S. Jia, Weichun Jiang, Jing Jin, L. Kong, Bing Li, Gang Li, W. Li, Xian Li, Xufang Li, Zhengwei Li, Chengkui Li, Lin Lin, Congzhan Liu, Ti-pei Li, Xiaobo Li, Xiaohua Liang, Jin-yuan Liao, Hongwei Liu, Xiaojin Liu, Xue-Feng Lu, Qiumin Luo, Tao Luo, Bin Ma, R. Ma, Xiang Ma, B. Meng, Y. Nang, Jianyin Nie, G. Ou, Xiao-Yue Ren, N. Sai, Xinying Song, Liang Sun, Ying Tan, Y. Tuo, Chen Wang, Wenshuai Wang, Ling Wang, Yusa Wang, Jieshuang Wang, X. Wen, Bobing Wu, Baiyang Wu, Mei Wu, S. Xiao, Yupeng Xu, S. Xiong, Sheng Yang, Yanji Yang, Q. Yi, Q. Yin, Y. You, Binggang Zhang, Fan Zhang, Hongmei Zhang, Juan Zhang, Wanchang Zhang, Wei Zhang, Binbin Zhang, P. Zhang, Yifei Zhang, Yuanhang Zhang, Haisheng Zhao, Xiaofan Zhao, Shijie Zheng, Dengke Zhou   +99 more
semanticscholar   +1 more source

Molecular Spectra Calculations Using an Optimized Quasi-Regular Gaussian Basis and the Collocation Method. [PDF]

Journal of Chemical Theory and Computation, 2021
We revisit the collocation method of Manzhos and Carrington [ J. Chem. Phys., 2016, 145, 224110] in which a distributed localized (e.g., Gaussian) basis is used to set up a generalized eigenvalue problem to compute the eigenenergies and eigenfunctions of
S. Flynn, V. Mandelshtam
semanticscholar   +1 more source

Arithmetic Progression Hypergraphs: Examining the Second Moment Method [PDF]

Workshop on Analytic Algorithmics and Combinatorics, 2017
In many data structure settings, it has been shown that using "double hashing" in place of standard hashing, by which we mean choosing multiple hash values according to an arithmetic progression instead of choosing each hash value independently, has ...
M. Mitzenmacher
semanticscholar   +1 more source

Holding times to maintain quasi-regular headways and reduce real-time bus bunching

Public Transport, 2023
Real-time control strategies deal with the day’s dynamics in bus rapid transit systems. This work focuses on minimizing the number of buses of the same line cruising head-to-tail or arriving at a stop simultaneously by implementing bus holding times at ...
Citlali M. Olvera-Toscano, Y. Ríos-Solís, R. Z. Ríos-Mercado, Romeo Sanchez Nigenda   +3 more
semanticscholar   +1 more source

Quasi‐Regular Graphs Associated with Commutative Rings

Journal of mathematics, 2022
One of the most important branches of mathematics is algebraic graph theory, which solves graph problems with algebraic methods. In graph theory, several algebraic properties of a ring can be represented.
N. Zeyada, Najat M. Muthana, Sultanah Al-Rashidi   +2 more
semanticscholar   +1 more source

Characterizing divergence and thickness in right‐angled Coxeter groups

Journal of Topology, Volume 15, Issue 4, Page 2143-2173, December 2022., 2022
Abstract We completely classify the possible divergence functions for right‐angled Coxeter groups (RACGs). In particular, we show that the divergence of any such group is either polynomial, exponential, or infinite. We prove that a RACG is strongly thick of order k$k$ if and only if its divergence function is a polynomial of degree k+1$k+1$.
Ivan Levcovitz
wiley   +1 more source

Using intra‐task flexibility on an intelligent tutoring system to promote arithmetic problem‐solving proficiency

British Journal of Educational Technology, Volume 53, Issue 6, Page 1976-1992, November 2022., 2022
Abstract Problem solving is often regarded as one of the most essential cognitive functions in our daily lives, and, for that reason, educational theorists have long stressed the need for its development. As cognitive flexibility is a fundamental characteristic necessary throughout the problem‐solving process, the purpose of this study is to analyse ...
Javier del Olmo‐Muñoz, José Antonio González‐Calero, Pascual D. Diago, David Arnau, Miguel Arevalillo‐Herráez   +4 more
wiley   +1 more source

Impact of Alkyl Chain Length on the Formation of Regular- and Reverse-Graded Quasi-2D Perovskite Thin Films

ACS Materials Letters, 2023
Crystallization of low-dimensional perovskites is a complex process that leads to multidimensional films comprising two-dimensional (2D), quasi-2D, and three-dimensional (3D) phases.
Alessandro Caiazzo, Kunal Datta, Laura Bellini, M. Wienk, René A. J. Janssen   +4 more
semanticscholar   +1 more source