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Objective. This study aims to explore the mediation role of perceived stress between nonrestorative sleep (NRS) and emotional distress, as well as the moderation role of resilience among NRS, perceived stress, and emotional distress in university students. Method. We recruited 851 students from the Be Resilient to Nursing Career program (BRNC, registration number: NFYKDX002) in June 2022. Nonrestorative sleep scale (NRSS), 10-item perceived stress scale (PSS-10), 10-item Kessler psychological distress scale (K10), and 10-item Connor-Davidson resilience scale (CD-RISC-10) were administered through a paper questionnaire. Latent profile analysis and moderated mediation analysis were performed. Results. Three profiles of perceived stress were identified: high ability-low stress (24.5%), middle ability-high stress (65.0%), and low ability-middle stress (10.5%). The mediation role of perceived stress between NRS and emotional distress was significant (SE=0.025; 95% confidence interval=-0.369, -0.269). The moderation role of resilience among NRS, perceived stress, and emotional distress was not significant. Conclusion. Heterogeneity exists in freshmen students' perceived stress. Perceived stress plays a significant mediating role between NRS and emotional distress, while resilience cannot significantly moderate the associations among NRS, perceived stress, and emotional distress. The trial is registered with ChiCTR2000038693., Author(s): Shuhan Li [1]; Yuan Liao [1]; Xiaona Wu [1]; Xiaoxiao Mei [1]; Yihao Zeng [1]; Jiahua Wu (corresponding author) [2]; Zengjie Ye (corresponding author) [1] 1. Introduction Research has [...]

Summary: This paper presents a wideband millimeter wave (mmWave) channel model for aerial reconfigurable intelligent surface (ARIS) communications, in which the reconfigurable intelligent surface (RIS) is attached to an unmanned aerial vehicle (UAV) to enable intelligent signal reflections in the air. The model is established according to standard 3GPP channel models and considers important propagation factors, for example, large‐scale fading, small‐scale fading, and radiation pattern of reflection units (RUs). In addition, the model assumes three‐dimensional (3D) rotations of RIS and can capture its effects on channel characteristics. Based on the model, we propose a design method for RIS reflection phases. Statistics including channel amplitude, spatial, temporal, and frequency correlation functions (CFs), and space‐Doppler power spectral density (SD‐PSD) are obtained. The impacts of RU number, UAV height and speed, and RIS rotation on channel statistics are investigated. Results suggest that the designed reflection phases can effectively mitigate multipath fading and Doppler effect. Compared to the yaw angle of the UAV platform, channel characteristics are more sensitive to the roll and pitch angles. [ABSTRACT FROM AUTHOR]