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Background Lawyer is one of the most stressful jobs, but lawyers' occupational stress is rather under-researched in China. Previous studies have shown that occupational stress and mental health are related to self-regulatory fatigue and health literacy in lawyers, but there is a lack of research on their interaction mechanism. Objective To explore the association of occupational stress and mental health in lawyers and the internal mechanism of action of self-regulatory fatigue and health literacy between them. Methods A convenience sample of 660 lawyers from 7 leading Chinese law firms were surveyed from May to June 2022 using questionnaires including a self-compiled Demographic Questionnaire, the Lawyers' Occupational Stress Scale, Symptom Checklist-90 (SCL-90), Self-regulatory Fatigue Scale (SRF-S) and National Residents' Health Literacy Surveillance Rapid Assessment Questionnaire (HLSRAQ). Stepwise regression was used to explore the mediating effect of self-regulatory fatigue between occupational stress and mental health, and bootstrap method was used to test the mediating effect of self-regulatory fatigue. Model 5 in PROCESS 3.4 was used to explore the moderated mediating effect of health literacy between occupational stress and mental health. Bootstrap method was used to test the moderating mediating effect of health literacy, and further simple slope test was used to test the moderating effect, and the effects of occupational stress on the mental health of lawyers with different health literacy levels were analyzed. Results Six hundred and fifty-six cases (99.39%) who effectively responded to the survey were included for final analysis. The average scores of occupational stress, SCL-90, SRF-S and HLSRAQ were (106.9±34.8), 39.0 (15.0, 84.0), (39.4±10.0) and (13.9±3.7), respectively. Stepwise regression analysis showed that occupational stress could positively predict mental health (β=0.36, t=13.40, P

Polyethylene terephthalate has been widely used in the packaging industry. Degraded PET micro(nano)plastics could pose public health concerns following release into various environments. This study focuses on PET degradation under ultraviolet radiation using the NIST SPHERE facility at the National Institute of Standards and Technology in saturated humidity (i.e., ≥95% relative humidity) and dry conditions (i.e., ≤5% relative humidity) with varying temperatures (30 °C, 40 °C, and 50 °C) for up 20 days. ATR-FTIR was used to characterize the chemical composition change of degraded PET as a function of UV exposure time. The results showed that the cleavage of the ester bond at peak 1713 cm−1 and the formation of the carboxylic acid at peak 1685 cm−1 were significantly influenced by UV radiation. Furthermore, the formation of carboxylic acid was considerably higher at saturated humidity and 50 °C conditions compared with dry conditions. The ester bond cleavage was also more pronounced in saturated humidity conditions. The novelty of this study is to provide insights into the chemical degradation of PET under environmental conditions, including UV radiation, humidity, and temperature. The results can be used to develop strategies to reduce the environmental impact of plastic pollution. [ABSTRACT FROM AUTHOR]

In this paper, we propose a novel 4D conservative chaotic system with a variety of interesting dynamic behaviors. By analyzing the divergence, Lyapunov exponent, equilibrium point and K-Y dimension of the proposed system, it is found that the system has hidden attractors and conservative characteristics. When the control parameters and initial values of the 4D conservative chaotic system are set to different values, the system shows hidden extreme multistability and offset boosting behaviors. In addition, in the case of fixed control parameters, when different initial values are selected, the system exhibits a variety of special transient transition behaviors, including quasi-periodic to periodic, quasi-periodic to hyperchaotic state. Subsequently, compared with existing systems, the complexity analysis of the chaotic sequence shows that the proposed system has a significant improvement in terms of sequence complexity. Finally, the system is implemented through a DSP hardware platform, preparing for subsequent engineering applications. [ABSTRACT FROM AUTHOR]