This study examines the adoption and usability of lifestyle (LS) apps, considering demographic factors like age and education that influence adoption decisions. The study employed a mixed-methods design, combining an experiment (spanning 14 weeks of app use) with semi-structured interviews and periodic measurements. The researchers employed the Mobile Application Usability Questionnaire (MAUQ) to identify pivotal aspects of standalone app usability, interface satisfaction, and usefulness at various stages of use, with a particular emphasis on the experiences of Hungarian students (n = 36). The results demonstrate that health-related factors have a significant impact on students’ behavior and evaluation of lifestyle apps over the 14-week period. Overall, the analyzed LS apps demonstrated positive outcomes in terms of supporting subject health and significantly improving the perceived health state. The findings highlight both practical and theoretical contributions to the field of mobile health applications, suggesting avenues for further research to either confirm or challenge existing theories.

The scientific objective of this study is to demonstrate how a hybrid photovoltaic-grid-generator microsystem responds under transient regime to varying loads and grid disconnection/reconnection. The object of the research was realized by acquiring the electrical magnitudes from the three PV systems (25 kW, 40 kW, and 60 kW) connected to the grid and the consumer (on-grid), during the technological process where the load fluctuated uncontrollably. Similar recordings were also made for the transient regime caused by the grid disconnection, diesel generator activation (450 kVA), its synchronization with PV systems, power supply to receivers, and grid voltage restoration after diesel generator shutdown. Analysis of the data focused on power supply continuity, voltage stability, and frequency variations. Findings indicated that on-grid photovoltaic systems had a 7.9% maximum voltage deviation from the standard value (230 V) and a frequency variation within ±1%. In the transient period caused by the grid disconnection and reconnection, a brief period with supply interruption was noted. This study contributes to the understanding of hybrid system behavior during transient regimes.

In the context of big data, the era of educational informatization has fully arrived, making the influence of information technology on language disciplines not to be underestimated. This has promoted vocational English teaching from the original slide multimodal demonstration teaching to the multimodal teaching stage relying on micro courses, playing a good synergistic role in improving English teaching classrooms, innovating teaching reforms, and improving students' English listening, speaking, reading, and writing abilities.

Objective: To explore the influencing factors of mental health and the mediating role of self-compassion between family cohesion and mental health. Method: Family Cohesion Scale, Symptom Checklist, and Self-compassion Scale were used to investigate 593 college students in Zhejiang Province. Result: Family Cohesion was negatively correlated with mental health and positively correlated with Self-compass- ion among college students; Self-compassion was negatively correlated with mental health. Self-compassion fully mediates the relationship between the two. Conclusion: The path of family cohesion is indirect, and strengthening Self-compassion education can improve the mental health level of college students.

The issue of virtue and happiness holds a crucial position in both Chinese traditional and Western philosophical systems, and to this day, it remains a hot topic of concern and discussion. The "Huainanzi" was written during the early Western Han Dynasty, mainly based on Taoist thoughts, incorporating various schools of thought to form its distinct theoretical system. It can be seen as a culmination of the traditional Chinese pre-Qin perspective on "virtue and happiness" holding significant research value. "Huainanzi" firmly believes that the ideal situation between virtue and happiness is and must be a consistent relationship.

This article analyzes library promotion in developing the Universitas Sumatera Utara (USU) towards a World Class University (WCU). Indonesia is experiencing educational obstacles in achieving the WCU title. Several factors influence the difficulty of achieving the WCU predicate, but the most dominant is the library’s role in accommodating student literacy skills. As one of the higher education institutions, USU understands the vital role of the library in increasing the intensity of literacy to achieve the WCU predicate. The urgency of this research is to review the promotion of the USU library in achieving the WCU predicate through the library as an instrument. This article uses qualitative research with a case study approach. The data collection techniques used in this article are in-depth interviews, observation, and documentation. Primary data sources in this article are research informants, while secondary data used are books, articles, and reportage. The data collected by the author will then be analyzed using content analysis techniques. The results show that the library has various vital roles in literacy reform so that USU can achieve the WCU title. In this case, the library pursues promotional strategies including 1) Product, 2) Price, 3) Promotion, and 4) Distribution. The whole promotion model contributes to improving campus literacy in achieving WCU goals.