The presence of charge promotes the propensity of a rotating black hole to support the propagation of electromagnetic plane waves with negative phase velocity (NPV) in its ergosphere, whether the Kerr–Newman or the Kerr–Sen metric descriptions of spacetime are considered. Striking differences in the NPV characteristics for the Kerr–Newman and Kerr–Sen metrics emerge from numerical studies, part...

Institute of Hypertension, Zhongshan School of Medicine, Sun Yat-sen 8 University, Guangzhou, China 510080 9 Department of Orthopedics, The 5 Affiliated Hospital, Sun Yat-sen University, 10 Zhuhai, China 519000 11 Department of Medicine, Division of Hypertension and Renal Diseases, 12 University of Colorado Denver, Aurora, CO, USA 80010 13 Department of Medicine, Division of Renal Diseases and ...

Zhichao Yan, Huanquan Liao, Hongrui Chen, Shuifeng Deng, Yu Jia, Caibin Deng, Jianxian Lin, Jian Ge, and Yehong Zhuo State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, People’s Republic of China Department of Ophthalmology, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, People’s Republic of China Department of Neurolo...

Long ago, since 1951, Lyra proposed a modification of Riemannian geometry. Based on the Lyra's modification on Riemannian geometry, Sen and Dunn constructed a field equation which is analogous to Einstein's field equations. Further more, Sen and Dunn gave series type solution to the static vacuum field equations. Retaining only a few terms, we have shown that their solutions correspond to black...

From the ‡ Department of Hepatobiliary Surgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, China, the § Thomas E Starzl Transplantation Institute, University of Pittsburgh School of Medicine, Pittsburgh, PA 15216, USA, the ¶ Department of Hepatobiliary and Pancreatic Surgery, The First Affiliated Hospital of Medical School of Zhejiang University, Hangzhou 310003, C...

Author affiliations: Centre for Medical Anthropology and Behavioral Health, Sun Yat-sen University, Guangzhou, China (J.T.F. Lau); Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China (J.T.F. Lau); Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China (J.T.F. Lau, Z. Wang, Y. Kim, Q. Zhou, P. Cheng); Sun Yat-sen ...

Fluid flow in the mold region of the continuous slab caster at Panzhihua Steel is investigated with 0.6-scale water model experiments, industrial measurements, and numerical simulations. In the water model, multiphase fluid flow in the submerged entry nozzle (SEN) and the mold with gas injection is investigated. Top surface level fluctuations, pressure at the jet impingement point, and the flow...

It would do no justice to a review of the Republic of China’s centennial development if focus is cast exclusively on the ROC’ early period on the Chinese mainland, the authoritarian era in Taiwan, or the two decades after democratization. This article attempts to provide a broad overview of the century of the Republic by putting the ROC’s three developmental stages in a theoretical framework, p...

Download Massive complex scalar field in the Kerr–Sen geometry: Exact solution of wave equation and Hawking radiation S. Q. Wu Interdisciplinary Center for Theoretical Study, and Department of Astronomy and Applied Physics, University of Science and Technology, Hefei 230026, People’s Republic of China and Institute of Particle Physics, Hua-Zhong Normal University, Wuhan 430079, People’s Republi...

Abstract: We propose here a smooth estimator of the mean residual life function based on randomly censored data. This is derived by smoothing the product-limit estimator using the Chaubey-Sen technique (Chaubey and Sen (1998)). The resulting estimator does not suffer from boundary bias as is the case with standard kernel smoothing. The asymptotic properties of the estimator are investigated. We...