Recently, the synthesis and application of metal and ceramic nanoparticle are significant subject in science and engineering. The metal nanoparticles such as silver, gold, and copper nanoparticles have more application in material science, nanomedicine, electronic, photonic, and art. One of the green methods for preparation of metal nanoparticles is laser ablation technique that offers a unique tool for nanofabrication of nanoparticles. In this technique, the high-power laser ablates the metal plate and the nanoparticles are formed in the liquid. The properties of nanoparticles using laser ablation are unique, and they are not reproducible by any other method such as chemical methods. The important parameters to produce the metal nanoparticles are energy, wavelength, repetition rate of laser, ablation time, and absorption of an aqueous solution. Laser ablation is a simple method for fabricating the metal nanoparticles without surfactant or chemical addition. In this chapter, the mechanism of formation of metal nanoparticles in liquid, significant parameters for using the laser ablation technique to prepare the metal nanoparticles, and the preparation of silver, gold and copper nanoparticles will be reviewed.

As a creative form of psychotherapy, drama appears to assist individuals in the COVID-19 pandemic and post-pandemic period in altering crisis conditions and challenging negative perspectives. Drama-based intervention is presented as an option for addressing mental health issues in clinical and general populations by utilising various multidisciplinary sources, such as psychodrama and role playing. In this study, a systematic review and meta-analysis were employed to assess the impact of drama on mental health and well-being during the COVID-19 pandemic and post-pandemic. Four electronic databases (PubMed, Cochrane, Web of Science, and ScienceDirect) were extensively searched from December 2019 to October 2022. Quality assessment and Risk of Bias tool of the Cochrane Collaboration were performed. Using a random effect model, standardised mean difference (SMD) values and 95% confidence intervals (CI) were calculated. In the final analysis, 25 studies involving 797 participants were included. The study revealed that drama-based interventions have the potential to improve mental health (e.g., trauma-related disorders) and well-being (e.g., psychological well-being), which could position drama as an adjunctive method of mental health care. This original review offered the newer, more comprehensive recommendations for drama-based intervention based on evidence.

Purpose: This study aimed to investigate binge-watching behavior and addiction among a sample of 446 Chinese college students and assess its consequences for mental health, with a particular focus on feelings of loneliness, anxiety, and depression. Participants and Methods: We conducted an online survey to gather data, examining participants’ binge-watching habits and preferred platforms. We also utilized regression analysis to assess the impact of binge-watching addiction on mental health, exploring the associations between binge-watching addiction and feelings of loneliness, anxiety, and depression. Results: Our findings revealed that the Chinese college students in our study typically defined binge-watching sessions as lasting approximately 7.22 hours, with an average of 10.83 episodes. Regarding the self-assessment of binge-watching, the average duration of participants was 5.76 hours, and the average number of episodes was 7.42. Tencent Video, iQIYI, and Bilibili emerged as the dominant platforms for binge-watching among the respondents. Regression analysis demonstrated a significant link between binge-watching addiction and mental health, with positive associations observed between binge-watching addiction and increased feelings of loneliness, anxiety, and depression. Conclusion: The results of this study reinforce previous findings regarding the detrimental effects of excessive media consumption on mental well-being. Moreover, they provide valuable insights into the global prevalence of binge-watching and its impact on the psychological health of young adults in the digital age, emphasizing the need for proactive measures to address this issue.

We demonstrate a stable, tunable dual-wavelength (DW) generated by launching an in-house built supercontinuum (SC) into an add-drop microring resonator (MRR). The MRR is fabricated from a silicon–nitrogen–oxygen substrate. The frequency comb of the filtered SC is obtained with an experimental free spectral range (FSR) from 0.39 to 0.46 nm corresponding to 48.7–57 GHz within the wavelength range 1520–1660 nm. The stability of a generated DW within the ranges 1561.16 and 1561.57 nm over 120 min is examined, where high, stable DW with a very low power fluctuation is achieved. This work has demonstrated the use of waveguide based MRR in the fiber laser system, and a remarkable flat and low power fluctuations frequency comb is achieved using the in-house built SC source and MRR.