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BackgroundThe enrichment of nuclear fuel may significantly influence the fuel performance of a reactor.PurposeThis study aims to explore the effect of U3Si2-Al plate-type fuel enrichment on its performance,MethodsThe fuel performance analysis code BEEs-Plates, neutronics Monte Carlo code OpenMC, and the one-dimensional system analysis code ZEBRA were coupled together within the MOOSE (Multiphysics Object-Oriented Simulation Environment) framework. Then the coupling code was employed to conduct the multiphysics coupling calculation for JRR-3 (Japanese Research Reactor No.3) fuel assembly enriched at 15%, 20%, and 25%. The data exchange among the three codes were realized with the help of interpolation transfer method implemented in MOOSE. Additionally, neutron physical parameters and fuel performance parameters after 231 d of operation were analyzed when the average fuel consumption of the module was 125.71 GWd∙tU-1.ResultsThe calculation results indicate that the max power density of fuel assembly enriched at 25% is 18% higher than the assembly enriched at 15%. Due to the high thermal conductivity of aluminum, the temperature difference in the fuel assembly is almost negligible whilst there is a significant difference in the fast neutron fluence. The results of fuel temperature and fast neutron fluence show that the volumetric strain is more obviously affected by the fuel temperature. Specifically, the plastic strain of the assembly with 25% enrichment is approximately 40% higher than that of the assembly with 15% enrichment.ConclusionThe analysis results of this study suggest that the assembly with a higher enrichment is more prone to failure.

Social media platforms have been used by various actors to bypass traditional media gatekeepers to share messages, draw attention, and accumulate influence. We study how actors from peripheral groups gain influence on social media and how their social media behaviors evolve over time. Integrating online strategic performance and hybrid media literature, we hypothesize that peripheral groups perform group identities to spur social media audience reaction and news media amplification, to which they further adapt their performance. By analyzing 242 QAnon Twitter accounts using topic modeling and time series modeling, we find that their in-group solidarity and out-group animosity tweets boost retweets, but not followers; increased retweets and followers drive news media amplification largely undertaken by right-wing outlets and motivate future performance of group identity, particularly of out-group animosity. The implications of social media and news media for the growth of peripheral actors and ideologies are discussed. [ABSTRACT FROM AUTHOR]

Balancing adolescents’ growing desire for independence with the establishment of effective media-related rules presents a complex challenge for many parents. Our study, utilising a diverse nationwide sample of 1,480 adolescents aged 13-17, investigates how adolescents’ perceptions of rule restrictiveness might explain the relationship between parental rule strategies and adolescents’ overuse of media. Indicators of overuse include dysregulated media engagement, interference of media use with other activities, and media-related physical symptoms. Structural equation modelling reveals that a higher number of rules and more frequent enforcement are associated with increased perceptions of restrictiveness among adolescents. However, adolescents tend to view rules as more reasonable when parents consistently adhere to these rules themselves, particularly in situations with numerous rules and strict enforcement. Notably, a curvilinear relationship emerges between adolescents’ perceptions of rule restrictiveness and media overuse indicators. Adolescents who perceive rules as reasonable, rather than overly restrictive or lenient, report lower levels of media overuse indicators. Our findings highlight the importance of parents establishing media use expectations that are balanced, reasonable, and that they themselves are committed to following. [ABSTRACT FROM AUTHOR]

Numerous studies have suggested that active social media use can promote well-being by enhancing perceived social support. However, the relationship between social media use and perceived social support remains inconsistent across studies. This study explores possible mechanisms underlying the relationship between active social media use, perceived social support, and well-being during and after a COVID-19 lockdown. Using online surveys with Chinese participants during (N = 1,131) and after (N = 407) the lockdown period, our findings support a sequential mediation model. Specifically, active social media use was positively associated with perceived online network responsiveness, which in turn, predicted augmented perceived social support. Ultimately, increased social support was linked to reduced loneliness and increased life satisfaction. These findings were consistent both during and after the lockdown, indicating that social media has the potential to complement offline social interactions and effectively fulfill individuals' social needs. [ABSTRACT FROM AUTHOR]

Background: Chemotherapy is an important approach for lung cancer patients. The study was designed to evaluate the feasibility of the compound probiotic supplements in improving the quality of life for lung cancer patients undergoing chemotherapy. Methods: This randomized, double‐blind, placebo‐controlled trial enrolled chemotherapy‐naive patients with lung cancer who were scheduled to receive platinum‐based doublet chemotherapy. All eligible patients were randomly administered (1:1) compound probiotic supplements (group BP‐1) or placebo (group C) for two chemotherapy cycles. The EORTC QLQ C30 questionnaire scores were evaluated before the first, second, and third cycles of chemotherapy. The primary endpoint was the difference in the EROTC QLQ C30 questionnaire score between the two groups after two cycles of chemotherapy. Results: A total of 110 patients were recruited from March 2021 to January 2022. After undergoing two cycles of chemotherapy, group BP‐1 were significantly better in various dimensions of the overall quality of life, role function, nausea and vomiting, appetite loss, constipation, and diarrhea relative to group C (76.90 ± 18.31 vs. 58.89 ± 17.17; 93.33 ± 11.58 vs. 85.93 ± 15.06; 0.00 ± 0.00 vs. 27.04 ± 29.15; 6.67 ± 13.53 vs. 22.22 ± 18.80; 0.95 ± 5.63 vs. 28.15 ± 22.42; 2.86 ± 9.47 vs. 15.56 ± 16.82; p < 0.05, respectively). The incidence of nausea and vomiting, appetite loss, constipation, and diarrhea in group BP‐1 was significantly lower than in group C (0% vs. 71.43%, 16.67% vs. 57.14%, 2.38% vs. 63.27%, and 7.14% vs. 42.86%, respectively, p < 0.001). Conclusions: Compound probiotic supplements can improve the quality of life and relieve chemotherapy‐related gastrointestinal side effects for lung cancer patients receiving platinum‐based doublet chemotherapy. (Chinese Clinical Trial Registry: ChiCTR1800019269). [ABSTRACT FROM AUTHOR]