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47 results on '"Zhao, Shuheng"'

1. GRB 220408B: A Three-Episode Burst from a Precessing Jet

Author

Zhang, Zijian, Yin, Yihan, Wang, Chenyu, Wang, Xiangyu Ivy, Yang, Jun, Meng, Yan-Zhi, Liu, Zi-Ke, Chen, Guo-Yin, Fu, Xiaoping, Gao, Huaizhong, Li, Sihao, Liu, Yihui, Long, Xiangyun, Ma, Yong-Chang, Pan, Xiaofan, Sun, Yuanze, Wu, Wei, Yang, Zirui, Ye, Zhizhen, Yu, Xiaoyu, Zhao, Shuheng, Zheng, Xutao, Zhou, Tao, Tang, Qing-Wen, Yan, Qiurong, Zhou, Rong, Wang, Zhonghai, Feng, Hua, Zeng, Ming, and Zhang, Bin-Bin

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

Jet precession has previously been proposed to explain the apparently repeating features in the light curves of a few gamma-ray bursts (GRBs). In this {\it Letter}, we further apply the precession model to a bright GRB 220408B by examining both its temporal and spectral consistency with the predictions of the model. As one of the recently confirmed GRBs observed by our GRID CubeSat mission, GRB 220408B is noteworthy as it exhibits three apparently similar emission episodes. Furthermore, the similarities are reinforced by their strong temporal correlations and similar features in terms of spectral evolution and spectral lags. Our analysis demonstrates that these features can be well explained by the modulated emission of a Fast-Rise-Exponential-Decay (FRED) shape light curve intrinsically produced by a precessing jet with a precession period of $18.4 \pm 0.2$ seconds, a nutation period of $11.1 \pm 0.2$ seconds and viewed off-axis. This study provides a straightforward explanation for the complex yet similar multi-episode GRB light curves., Comment: 11 pages, 3 tables, 8 figures

Published
2023

19. Contributors

Author

He, Chao, primary, Hu, Jianjun, additional, Jiang, Danping, additional, Jiao, Youzhou, additional, Jing, Yanyan, additional, Li, Gang, additional, Li, Panpan, additional, Liu, Zhiqiang, additional, Lu, Chaoyang, additional, Ma, Kebo, additional, Yang, Sheng, additional, Zhang, Quanguo, additional, Zhang, Zhiping, additional, Zhang, Huan, additional, Zhao, Shuheng, additional, and Zhu, Shengnan, additional

Published
2021
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22. GRB 220408B: A Three-Episode Burst from a Precessing Jet

Author

Zhang, Zijian, primary, Yin, Yi-Han Iris, additional, Wang, Chenyu, additional, Wang, Xiangyu Ivy, additional, Yang, Jun, additional, Meng, Yan-Zhi, additional, Liu, Zi-Ke, additional, Chen, Guo-Yin, additional, Fu, Xiaoping, additional, Gao, Huaizhong, additional, Li, Sihao, additional, Liu, Yihui, additional, Long, Xiangyun, additional, Ma, Yong-Chang, additional, Pan, Xiaofan, additional, Sun, Yuanze, additional, Wu, Wei, additional, Yang, Zirui, additional, Ye, Zhizhen, additional, Yu, Xiaoyu, additional, Zhao, Shuheng, additional, Zheng, Xutao, additional, Zhou, Tao, additional, Tang, Qing-Wen, additional, Qiu, Qiurong, additional, Zhou, Rong, additional, Wang, Zhonghai, additional, Feng, Hua, additional, Zeng, Ming, additional, and Zhang, Binbin, additional

Published
2023
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24. Photocatalytic Degradation and Toxicity Analysis of Sulfamethoxazole using TiO 2 /BC.

Author

Dang, Jiatao, Pei, Wenjun, Hu, Fumeng, Yu, Zaihui, Zhao, Shuheng, Hu, Jianjun, Liu, Jiuli, Zhang, Dongliang, Jing, Zhixuan, and Lei, Xuan

Subjects
PHOTODEGRADATION, TITANIUM dioxide, ANIMAL morphology, SULFAMETHOXAZOLE, CORN straw
Abstract

Sulfonamide antibiotics in the environment not only disrupt the ecological balance but can also enter the human or animal body in various forms and cause harm. Therefore, exploring efficient methods to degrade sulfonamide antibiotics is crucial. In this study, we prepared biochar (BC) using corn straw, and TiO2/BC was obtained by doping different proportions of TiO2 into biochar with varying carbonization temperatures using the sol–gel method. Next, we investigated the degradation of sulfamethoxazole (SMX) in solution using the generated TiO2/BC under ultraviolet irradiation and studied the effects of various experimental parameters, such as the type of composite material, composite material addition, solution pH, and initial antibiotic concentration on SMX degradation. Under an initial SMX concentration of 30 mg/L, the composite with the best photocatalytic degradation performance was TiO2/BC-5-300 (i.e., 5 mL of TiO2 doping; 300 °C calcination temperature), with an addition amount of 0.02 g and a solution pH of 3. The degradation efficiency increased from 22.3% to 89%, and the most significant degradation effect occurred during the initial stage of photocatalytic degradation. In the TiO2/BC-5-300 treated SMX solution, the average rhizome length of bean sprouts was significantly higher than that of the untreated SMX solution and slightly lower than that of the deionized aqueous solution (3.05 cm < 3.85 cm < 4.05 cm). This confirmed that the photocatalytic degradation of SMX by the composite was effective and could efficiently reduce its impact on the growth of bean sprouts. This study provides essential data and theoretical support for using TiO2/BC in the treatment of antibiotic-contaminated wastewater. [ABSTRACT FROM AUTHOR]

Published
2023
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28. Applying the Cultural Approach to Cognitive Development

Author

Gauvain, Mary, Beebe, Heidi, and Zhao, Shuheng

Abstract

Cognitive development is a cultural process. More experienced cultural members and the practices, institutions, and artifacts of the culture provide support and guidance for children as they develop knowledge and thinking skills. In this article, the authors describe the value that is added to our understanding of cognitive development when cultural contributions are taken into account. They discuss theoretical and practical issues of cultural research with the aim of encouraging researchers to consider culture more centrally in their own work.

Published
2011
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35. Familial Contribution to Chinese American Children's Self-Regulated Learning during the Early School Years

Author

Zhao, Shuheng

Subjects
Developmental psychology, Asian American studies, Early childhood education, Academic Achievement, Chinese American, Early Elementary School Year, Everyday Family Activities, Parental Self-Efficacy, Self-Regulated Learning
Abstract

This dissertation examined how Chinese American children's everyday family experiences contributed to their self-regulated learning during the early school years. A total of 154 immigrant Chinese parents participated in this study and completed nine sets of multi-point rating questionnaires on a secured website. A series of analysis of covariance and hierarchical regressions were performed. Results provided the first empirical evidence that children's participation in family rituals and routines had significant positively influences on children's self-regulated learning strategies, over and above the influences of parental expectations of children's school attainment and executive functions. Children's competence in self-regulated learning strategies, in turn, was positive related to their academic achievement. Results also indicated that parental self-efficacy in helping children succeed in school positively influenced Chinese American children's opportunities to participate in family rituals and routines. Nevertheless, unexpected results demonstrated that Chinese American first and fourth graders did not differ significantly on self-regulated learning strategies and participation in family rituals and routines. One possible explanation is that Chinese American children may have already developed self-regulated learning strategies, and started to participate in family rituals and routines before they enter first grade. The dissertation concludes with a discussion of the implications and limitations of this research.

Published
2013

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