Bangkokthonburi University

Background and Aims: Tennis is gaining popularity in Sichuan Province, especially among youth in Chengdu, but its development faces significant challenges in management, accessibility, and structured promotion. Key obstacles include the lack of systematic strategies, limited resources, inconsistent training programs, and a shortage of qualified youth coaches, which hinders players from reaching their potential. Nonetheless, sustainable youth tennis development requires substantial investment in facilities, coaching, and equipment, alongside stronger collaboration between clubs, schools, and sports organizations to establish a well-structured pathway for long-term growth. Therefore, this research aimed to develop management guidelines to promote youth tennis excellence in Chengdu. Methodology: The population of this research was 383 young tennis players, 17 tennis coaches, and 12 tennis club managers from 5 tennis clubs in Chengdu, namely, Chengdu Qingshenglan Tennis, Chengdu Wuhou Tennis Center, Qikeshu Tennis Club, Huoshan Tennis Sports Center, and Chengdu Hi-Tech Tennis Center. A sample group consisting of all 17 tennis coaches and 12 tennis club managers. Using the Krejcie & Morgan table, 191 young tennis players were chosen as the research sample to investigate the current situation and challenges of promoting excellent tennis for youth in Chengdu City. In this research, 7 experts were invited for interviews to draft the components of the management guideline. Additionally, 10 experts participated in a focus group discussion to develop management guidelines. Following this, 7 experts were invited for a connoisseurship discussion to confirm the developed management guideline. Data were analyzed using mean, standard deviation, and content analysis. The IOC value was as follows: questionnaire for students was 0.80, questionnaire for tennis coaches and tennis club managers was 0.92, and expert interview outline was 0.87. Results: The results showed that the management guideline was organized in 10 aspects as follows: (1) Financial Support with 3 elements; (2) Integrated Policy Development with 3 elements; (3) Foundation and Participation with 3 elements; (4) Talent Identification and Development with 3 elements; (5) Athletic Career and Post-Career Support with 3 elements; (6) Training Facilities with 3 elements; (7) Coaching Provision and Development with 3 elements; (8) (Inter)national Competition with 3 elements; (9) Scientific Research and Innovation with 3 elements; (10) Stakeholder Engagement and Governance with 3 elements. Conclusion: Following validation through the connoisseurship method, all seven experts unanimously agreed that the developed management guideline to promote youth tennis excellence in Chengdu provides a comprehensive, practical, and contextually appropriate framework, aligned with local conditions. In addition, the management guideline developed in this research can also be applied to areas beyond Chengdu. The management framework can be adapted appropriately to different contexts and situations to support the development of youth tennis players toward excellence.

Background and Aims: Wushu is a significant component of Chinese traditional culture, integrating physical training, artistic expression, and philosophical values. However, its promotion in modern universities remains limited due to insufficient resources, weak cultural integration, and low student participation. This study aimed to develop comprehensive guidelines to promote and sustain Wushu culture among university students at Jimei University, Fujian Province. Methodology: The sample included 379 first-year students (male and female, aged 18–20 years) selected through stratified sampling, and 25 physical education teachers purposively included from Jimei University. In addition, 7 experts participated in interviews, 9 experts in focus group discussions, and 7 experts in a connoisseurship validation session. Research tools consisted of questionnaires, interview guides, focus group protocols, and validation forms. The validity of the instruments was confirmed using the Index of Item-Objective Congruence (IOC) (student questionnaire = 0.87; teacher questionnaire = 0.91; interview form = 0.93). Quantitative data were analyzed using mean and standard deviation, while qualitative data were examined through thematic content analysis. Results: The findings highlighted that students and teachers recognized the cultural importance of Wushu but identified critical barriers such as inadequate funding, limited cultural elements in curricula, and low engagement. The developed guideline was organized under the POLC framework: (1) Planning, clear objectives, needs assessment, partnerships, and annual planning; (2) Organizing, funding allocation, management teams, instructor development, and integrated curricula; (3) Leading, student engagement, motivational leadership, campus promotion, and communication; (4) Controlling, performance monitoring, feedback systems, teaching evaluation, and policy review. Conclusion: The study produced a systematic, practical, and culturally relevant guideline for managing and promoting Wushu culture in universities. The model not only improves student engagement and cultural identity but also provides universities with sustainable strategies for integrating traditional culture into modern higher education. These guidelines benefit students, teachers, administrators, and policy makers, contributing to both cultural preservation and educational innovation.

Background and Aims: The objectives of this study were to: (1) examine the level of administrative skills of school administrators under the Office of the Private Education Commission, Bangkok, (2) examine the level of teachers’ quality of work life under the Office of the Private Education Commission, Bangkok, and (3) investigate how administrators’ skills influence teachers’ quality of work life. Methodology: The sample comprised 341 school administrators and teachers from private schools under the Bangkok Metropolitan Administration in the 2024 academic year, selected via stratified random sampling. The research instrument was a questionnaire. Data were analyzed using frequency, percentage, mean, standard deviation, and stepwise multiple regression analysis. Results: The overall level of administrators’ skills was highest. Among the skill components, conceptual skills had the highest average score, followed by human skills; technical skills had the lowest. (2) The overall quality of work life among teachers was also at the highest level. The highest-rated aspect was fair and adequate compensation, followed by a safe working environment; career advancement and job security received the lowest ratings. (3) The administrative skills of school administrators significantly influenced teachers’ quality of work life at the .01 level. Conclusion: The most influential predictive administrative skills of school administrators were conceptual skills (X1), human skills (X2), and technical skills (X3), which together explained 24.50% of the variance in teachers’ quality of work life (R² = .245).

IntroductionExpertise is traditionally associated with enhanced perceptual accuracy, yet we demonstrate a paradoxical pattern in skilled motor performance: greater expertise corresponds to systematic functional recalibration of effort perception relative to objective force. This study examined how calligraphy skill development alters perceived effort and its consequences for aesthetic judgment, from an embodied cognition perspective.MethodsSixty calligraphy learners (20 novices, 20 intermediates, 20 experts) wrote five standard Chinese characters while pressure sensors and surface electromyography simultaneously recorded pen-tip pressure, upper limb muscle activation, and subjective effort ratings. Professional judges evaluated the aesthetic quality of all works.ResultsResults revealed systematic skill-dependent perceptual recalibration: experts’ perceived effort deviated from actual pressure by 60% (recalibration index = 0.347), 4.5 times greater than novices’ 15% deviation (0.078), with intermediates showing 40% deviation (0.201). This functional recalibration was strongly associated with muscle synergy reorganization (r = 0.74): experts developed a “proximal-dominant, distal-refined” activation pattern, with increased shoulder and arm muscle engagement despite reduced pen-tip pressure. Critically, in predicting aesthetic ratings, perceived effort was a powerful predictor (β = 0.58, p < 0.001) while actual pressure showed no predictive value (β = 0.02, p = 0.658). Mediation analysis revealed that perceptual recalibration accounted for 63.2% of skill level’s effect on aesthetic judgment.DiscussionThese findings suggest that perception in skilled performance undergoes functional recalibration to optimize task performance, reflecting an adaptive reorganization shaped by embodied experience rather than veridical representation of physical force. The systematic perceptual recalibration with expertise reveals that expert perception prioritizes task-relevant functional information over veridical physical accuracy.

Friction-induced vibration is a critical issue in railway tread brake systems, as it can affect braking stability, wear, and the dynamic response of mechanically connected components. This study numerically investigates the self-excited vibration behavior of a tread brake unit and its interaction with a slack adjuster compensator under braking conditions. A simplified single-degree-of-freedom dynamic model incorporating a velocity-dependent Coulomb friction formulation is developed to analyze the vibration response of the brake block under continuous sliding conditions. The governing nonlinear differential equation is solved using the Runge–Kutta method, and time- and frequency-domain analyses are performed to identify dominant vibration characteristics. The numerical results indicate the presence of low-frequency self-excited vibration induced by dry friction, while the contact interface remains in a continuous sliding regime and no classical stick–slip transition involving intermittent adhesion is observed. The dominant vibration frequency is approximately 0.35 Hz, reflecting the global mass–stiffness dynamics of the brake unit rather than high-frequency stick–slip or squeal phenomena. A finite element modal analysis of the slack adjuster compensator shows that its natural frequencies are several orders of magnitude higher than the dominant vibration frequency, indicating that resonance is unlikely under the investigated operating conditions. The findings provide insight into friction-induced vibration mechanisms in railway tread brake systems and their implications for vibration safety and structural integrity.

Viscosity variations within cellular microenvironments are closely associated with pathological states such as cancer, motivating the development of molecular probes that integrate environmental sensing with therapeutic function. Here, we report two anthracene-fused heptamethine cyanine molecular rotors, ASCy7 (asymmetric) and SCy7 (symmetric), designed as heavy-atom-free near-infrared (NIR) materials for combined viscosity sensing and imaging-guided photodynamic therapy (PDT). Anthracene π-extension enhances intramolecular charge transfer and spin-orbit coupling, thereby promoting intersystem crossing and efficient singlet oxygen generation under 850 nm irradiation. Both probes exhibit strong viscosity-dependent fluorescence via the twisted intramolecular charge transfer (TICT) mechanism and show selective mitochondrial localization in HepG2 cells. Upon NIR activation, ASCy7 and SCy7 induce reactive oxygen species-mediated apoptosis with IC50 values as low as 0.39 µM, while maintaining excellent dark biocompatibility. This work establishes π-extension engineering as an effective materials design strategy to integrate environmental responsiveness and photodynamic activity within a single NIR cyanine platform for cancer theranostics.

With the development of the digital economy, livestream marketing for agricultural products has become an important channel for promoting the digital transformation of rural industries. Drawing on user value theory, this study examines how social presence influences customer engagement in agricultural livestream marketing by incorporating customer satisfaction as a mediating variable and trust atmosphere as a moderating variable, and proposes a conceptual model. Based on data from 312 valid questionnaires, the results show that social presence positively affects customer engagement both directly and indirectly through customer satisfaction. Moreover, trust atmosphere strengthens the direct effect of social presence on customer engagement as well as the mediating role of customer satisfaction. This study extends consumer behavior research by integrating livestream marketing into the theoretical framework and highlighting the role of livestream-specific relational factors in shaping customer behavior. The findings also provide actionable insights for optimizing agricultural livestream marketing, including fostering trust, enhancing interactivity, and supporting farmers and e-commerce platforms.