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( Boyun Woo ) 한국스포츠정책과학원(구 한국스포츠개발원) 2016 International Journal of Applied Sports Sciences Vol.28 No.2
Managing human capital in an effective manner is always a challenge for sport managers. The purpose of the study was to examine the relationships among perceived support, collectivism, affective commitment, work effort, and intention to leave among sport instructors across the United States. The data were collected from 379 ACSM certified sport instructors using online questionnaire. The results showed that perceived support, which is represented by coworker support, supervisor support, and organizational support, and collectivism had a significant impact on affective commitment explaining 75.0% and 13.2% of the variances respectively. In addition, affective commitment explained 19.0% of the variance in work effort and 61.9% of the variance in intention to leave. This study significantly contributes to the existing body of knowledge in sport management literature and provides meaningful guidance to sport managers on how to retain valuable employees and elicit the best work effort they could offer.
Age, Gender, Perceived Social Support, and Organizational Commitment among Fitness Employees
( Boyun Woo ),( Susan Lang ),( Ye Hoon Lee ) 중앙대학교 학교체육연구소 2017 Asian Journal of Physical Education of Sport Scien Vol.5 No.1
The purpose of this study was to examine the relationships between age, gender, perceived social support, and organizational commitment among fitness employees in the United States. A total of 420 employees completed the questionnaires measuring their demographic information and proposed variables. Confirmatory factor analysis and structural equational modeling technique was employed to test the theoretical model. The findings of this study revealed that fitness employees` gender was positively related to their perceived social support. However, employees` age was not significantly related to their perceived social support. Finally, perceived social support was found to be positively related to their organizational commitment. The results of this study highlighted the importance of gender differences in the perception of social support among fitness employees, which in turn affect their organizational commitment.
( Boyun Woo ) 한국스포츠정책과학원(구 한국스포츠개발원) 2017 International Journal of Applied Sports Sciences Vol.29 No.1
Competition among golf courses in South Korea for recruiting and retaining customers has increased dramatically over the years as the number of golf courses grew. Therefore, it has become important for golf course managers to understand what attracts golfers to their golf courses. The purpose of this study was to examine the relationships among motivation, service quality, customer satisfaction, and loyalty among recreational golfers in South Korea. Total 563 recreational golfers participated in this study and responded to a self-administered survey measuring the constructs. The result showed that intrinsic motivation and extrinsic motivation were positively associated with service quality whereas amotivation was negatively related to service quality. In addition, golfers` perceived service quality had a positive impact on golfers` satisfaction and loyalty towards golf courses. These results suggest that golf course managers should understand the types and levels of motivation golfers have and develop strategies for enhancing service quality.
Revisiting the Model of Sport Consumption: Review of Theories and Suggestions
( Boyun Woo ) 중앙대학교 학교체육연구소 2016 Asian Journal of Physical Education of Sport Scien Vol.4 No.1
One of the important tasks of sport marketers is developing effective marketing strategies for increasing game attendance. In order to do so, it is important to understand the overall psychological process of sport consumers. The purpose of this paper is to revisit the model of sport consumption suggested by Trail and James (2008) and review various theories explaining the relationships among the constructs. In particular, identity theory, social identity theory, the theory of planned behavior, attitude theory, decision-making theory, and satisfaction theory are discussed in relation to the model of sport consumption. In addition, possible deficiencies of the model as well as possible inclusions of other constructs and paths that can help enhancing the model are discussed.
김재우(Jae Woo Kim),김보윤(Boyun Kim),박영근(Young-Gun Park),송민혜(Min Hye Song),노영정(Young Jung Roh) 대한검안학회 2011 Annals of optometry and contact lens Vol.10 No.2
목적: 비당뇨성 유리체출혈 환자에서 유리체절제술의 수술시기와 시력예후와의 상관관계 및 추정되는 원인질환을 알아보고자 하였다. 대상과 방법: 유리체출혈로 유리체절제술을 시행받은 환자 97안을 대상으로 의무기록을 바탕으로 추정되는 원인질환을 조사하였다. 또한 출혈 후 6주를 기준으로 조기와 후기 수술군으로 나누어 수술 전 후 최대교정시력 및 시력 향상 정도, 유리체출혈 후 유리체절제술까지의 기간과 시력과의 상관관계 등에 대해 비교하였다. 결과: 망막정맥분지폐쇄, 망막열공, 외상이 원인인 경우 조기 수술군과 후기 수술군의 수술 전 평균시력, 수술 1년 후 시력평균, 시력향상치의 평균은 통계적으로 유의한 차이를 보이지 않았으나(p>0.05)망막중심정맥폐쇄의 경우는 조기수술군이 후기수술군에 비해 시력향상치의 평균이 유의하게 높았다(p=0.005). 결론: 망막중심정맥폐쇄 이외의 비당뇨성 유리체출혈이 있는 환자에서 수술의 시기가 통계학적으로 유의한 시력 차이를 가져오지는 않았으나 조기 수술로 시력회복을 도모하고 유리체출혈의 원인 질환을 규명하여 합병증을 줄이는 방향으로 치료 계획을 세우는 것이 중요할 것으로 사료된다. Purpose: To investigate the correlation between the time of vitrectomy and visual prognosis and possible causes of vitreous hemorrhage in non-diabetic patients diagnosed with vitreous hemorrhage. Methods: This study investigated the possible causes of vitreous hemorrhages based on the medical records of 97 eyes that underwent vitrectomy. Subjects were divided into early (within 6 weeks) and late (after 6 weeks) groups based on the time of surgery, and the best corrected visual acuity, visual acuity improvement, and the correlation between the time of surgery and the visual acuity were analyzed. Results: There was no significant difference in average visual acuity before a vitrectomy, average visual acuity 1 year after the surgery, mean visual acuity improvement between the two groups when the underlying cause was branch retinal vein occlusion, retinal tear, or trauma (p>0.05). However, when the underlying cause was central retinal vein occlusion, the mean visual acuity improvement was significantly higher in the early surgery group (p=0.005). Conclusions: The timing of vitrectomy in non-diabetic patients with vitreous hemorrhages caused by diseases other than central retinal vein occlusion did not significantly increase the visual acuity. However, it is important to promote early visual recovery and find out underlying disease of vitreous hemorrhage by early vitrectomy in order to prevent complications.
Shin Anna,Jang Boyun,Cho Sunyoung,Kim Youngsoo,Park Min Soo,Park Kwang-Il,Kim Young Woo,Kim Choon Ok 대한독성 유전단백체 학회 2024 Molecular & cellular toxicology Vol.20 No.2
Background This study investigates the interactions between various doses of hyperforin, a key compound in St. John’s Wort, and sedative hypnotics such as zolpidem, alprazolam, and midazolam. Since St John’s Wort is known to be an inducer of cytochrome P450 (CYP) 3A4, co-administration with drugs metabolized by CYP3A4 has been contraindicated. Objective We studied the risks of combination use and the possibility of safe combination by simulating the interaction of hyperforin, a key compound in St. John’s Wort, with drugs metabolized by CYP3A4 that can be used to relieve various symptoms of depression. Understanding these interactions is crucial for optimizing the treatment of depression and associated symptoms. Results The hyperforin physiologically based pharmacokinetic (PBPK) model was validated against clinical data, and PBPK models for zolpidem, alprazolam, and midazolam were used to predict herb–drug interactions. The simulations with a two-week co-administration scenario showed that hyperforin potentially acts as a weak inducer (hyperforin dose 2–20 mg, 3 times a day, AUC ratio 0.8–0.68) of 10 mg zolpidem metabolism, with sex-dependent interactions largely unaffected. However, the pharmacokinetics of alprazolam at doses of 0.25, 0.5, and 1 mg were minimally impacted (hyperforin dose 1–20 mg, 3 times a day, AUC ratio 0.96–0.87). In the case of 7.5 mg midazolam, hyperforin acted as a moderate to strong inducer (hyperforin dose 1–20 mg, 3 times a day, AUC ratio 0.26–0.20), even at low doses. Conclusions These findings emphasize the importance of careful monitoring and dose adjustments when using hyperforin and sedative hypnotics together. This study provided insights into co-administration of hyperforin and sedative hypnotics, facilitating the safe and effective use of these medications. Based on these results, it is necessary to know the possibility of safer drug combination, and to conduct clinical research and verification on this.