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Oceanisphaera avium sp. nov., isolated from the gut of the cinereous vulture, Aegypius monachus
Sung, Hojun,Kim, Hyun Sik,Lee, June-Young,Kang, Woorim,Kim, Pil Soo,Hyun, Dong-Wook,Tak, Euon Jung,Jung, Mi-Ja,Yun, Ji-Hyun,Kim, Min-Soo,Shin, Na-Ri,Whon, Tae Woong,Rho, Jeong Rae,Park, Sun Duk,Shim, Microbiology Society 2018 International journal of systematic and evolutiona Vol.68 No.6
Tumebacillus avium sp. nov., isolated from the gut of a cinereous vulture, Aegypius monachus
Sung, Hojun,Kim, Hyun Sik,Lee, June-Young,Kang, Woorim,Kim, Pil Soo,Hyun, Dong-Wook,Tak, Euon Jung,Jung, Mi-Ja,Yun, Ji-Hyun,Kim, Min-Soo,Shin, Na-Ri,Whon, Tae Woong,Rho, Jeong Rae,Park, Sun Duk,Shim, Microbiology Society 2018 International journal of systematic and evolutiona Vol.68 No.5
성호준 ( Sung Hojun ) 인천대학교 스포츠과학연구소 2021 스포츠科學硏究誌 Vol.33 No.0
본 논문의 목적은 스포츠 경제학 분야에서 활발히 진행되고 있는 전력 평준화와 결과의 불확실성의 관련된 연구와 스포츠 수요의 연구에 관한 현황을 알아보고 국내 연구 주제들에 대한 실태 파악을 주목적으로 한다. 1954년 Simon Rottenberg의 논문에서 시작되었다고 볼 수 있는 스포츠 경제학은 이후 경제학과 스포츠 경영 분야에서 많은 연구자를 배출하였고 다양한 스포츠와 국가에서 다양한 주제로 연구가 진행되고 있다. 국내에서도 스포츠 경제학과 관련된 연구들이 활발히 진행되고 있으며, 이를 바탕으로 이 분야의 향후 방향에 대해 제언하고자 한다. This paper aims to review the history of research in competitive balance, outcome uncertainty, and demand for sport within sports economics and also to see the trend of domestic research line. Sports economics, which is commonly believed to emerge since seminal work of Simon Rottenberg in 1954, have produced many scholars and various research activities are in progress within various sports and nations. There are also active stream of research in Korea and I provide future direction of the field. in last section.
성호준 ( Sung Hojun ),이윤구 ( Lee Yoongu ) 한국체육학회 2021 한국체육학회지 Vol.60 No.4
본 연구는 K-리그 시즌 티켓 팬을 대상으로 경기 결과의 불확실성, 경기의 질, 관람의 질 등의 관람결정요인을 분석하는 것을 주목적으로 한다. 연구의 목적을 달성하기 위하여 2019년 K-리그 정규시즌 경기에 직접적으로 경기장을 방문한 시즌 티켓 팬의 수를 이용하여 총 165경기의 데이터를 활용하였고, 팀 고정 효과를 포함한 다중회귀분석을 실시하였다. 그 결과, K-리그 시즌 티켓 팬은 경기 결과의 불확실성과 높은 선수 연봉의 총합에 정적 영향을 받았다. 그러나 관람의 질과 관련된 경기장의 연차는 시즌 티켓 팬에게 유의미한 관람결정요인이 아니었다. 그 외에 주말 경기에서 시즌 티켓 팬의 방문이 증가하는 것을 발견하였으며, 홈 팀과 원정 팀의 물리적 거리가 증가할수록 시즌 티켓 팬의 방문이 감소하는 것을 발견하였다. 본 연구의 결과를 통하여 K-리그 시즌 티켓 팬에 대한 심층 높은 이해에 기여하고자 하며 후속 수요연구에서 팬의 세분화의 전략적 중요성을 강조한다. The current paper aims to investigate determinants of sport demand including outcome uncertainty, game quality, and viewing quality of K-league season ticket holders. For the purpose, this paper utilizes total of 165 season ticket attendance data of 2019 K-league regular season games and multiple regression analysis with team fixed effects. As a result, it was revealed that season ticket holders of K-league showed preference for games with higher outcome uncertainty and games with higher total wage of both home and away team. Nevertheless, viewing quality measured via stadium age was not a significant determinant. Beside our mainly interested variables, weekend games drew additional season ticket holders to the stadium while increase in physical distance between home and away team reduced season ticket holders’ visitation. The implication of our paper seeks to contribute for better understanding of K-leauge season ticket holders and emphasize the importance of fan segmentation in demand estimaton for future studies.
A method of bedside urethrography before catheterization in pelvic trauma in Korea: a case report
( Hojun Lee ),( Sung Yub Jeong ),( Kun Hwang ) 대한외상학회 2023 大韓外傷學會誌 Vol.36 No.4
We introduce a convenient method of urethrography before catheterization for patients with pelvic trauma that can be used in a resuscitation area. A 10-mL syringe without a needle was used. X-ray contrast medium (Iohexol, 300 mg I/mL) was administered through the urethral orifice using a 10-mL syringe without needle and a simple pelvic anteroposterior film was taken (70 kilovolt [peak], 50 mAs). A 36-year-old soldier with a saddle injury from a gun barrel was taken to a trauma center. He had a pelvic fracture and complained of hematuria. Bedside urethrography above described was performed. The anterior urethra showed nonspecific findings, but dye leaked from the posterior urethra. Bedside Foley catheter insertion was attempted, but the catheter could not be advanced past the membranous urethra. Thereafter, suprapubic catheterization was performed. On the day of the injury, iliac artery embolization was carried out. The dislocated sacroiliac joint was also treated using open reduction and internal fixation. On hospital day 7, guidewire Foley insertion was performed. This bedside urethrography technique is simple and useful for pelvic fractures in which urethral injury is suspected.
Suppression of Coating Layer Crack by Diffusion Heat Treatment in Al-Si Coated HPF Steels
Sang‑Man Yun,Hojun Gwon,Jinkeun Oh,Sung‑Joon Kim 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.11
The effect of diffusion heat treatment (DHT) on the cracking of the coating layer in Al-Si coated hot press forming (HPF)steel was investigated. Cracking-induced micro-delamination in the coating layer has limited applications of the Al-Si coatedHPF steels. Introduction of DHT process can modify the microstructure and constituent phase in the coating layer whichcan reduce the cracking. DHT was performed at 650 °C for 360 min to drive Fe diffusion into the coating layer. Formationof band-shaped τ1-Fe3Al2Si3 in the coating layer during the DHT was observed by EBSD and SEM. After HPF process ofthe diffusion heat treated coating specimen, the phase fraction of FeAl increased and that of η-Fe2Al5 decreased comparedto the conventional Al-Si coating specimen, due to the increase of τ1-Fe3Al2Si3. Owing to the higher fracture toughness ofFeAl compared to η-Fe2Al5, application of DHT improved the toughness of the coating layer and reduced the crack densityin it. DHT did not significantly affect the mechanical properties of the base steel.
Impact of the COVID-19 Pandemic on the Mental Health of Adolescent Students in Daegu, Korea
Lee Hojun,Noh Yeseul,Seo Ji Young,Park Sang Hee,Kim Myoung Haw,Won Seunghee 대한의학회 2021 Journal of Korean medical science Vol.36 No.46
Background: In February 2020, as coronavirus disease 2019 (COVID-19) spread rapidly in Daegu, South Korea, students in that region experienced many emotional difficulties. In this study, we analyzed the stress and emotional crisis experienced by students during the COVID-19 pandemic, its causative factors, and the factors that affect negative emotions. Methods: We identified the demographic information related to the experiences of unbearable stress and emotional crisis and their causal factors at three points in time: before the pandemic, during its peak, and at the time of the survey (2–3 months after the peak). In addition, we analyzed the factors related to depression and anxiety experienced by students during the COVID-19 pandemic. The Korean version of the Patient Health Questionnaire 9 and the Korean version of the Generalized Anxiety Disorder 7 was used to assess for depressive and anxiety symptoms in the subject students, respectively. Results: A total of 8,177 students participated in the analysis, with 4,072 boys (49.8%), 4,105 girls (50.2%), and 4,463 middle school students (54.6%) and 3,177 high school students (45.4%). The percentage of students who experienced unbearable stress was 9% before the COVID-19 pandemic, increased to 16% at the peak of the COVID-19 pandemic, then decreased to 12.7% at the time of the survey. Stress was experienced more by girls (18.1% versus 13.8% in boys; χ2 = 28.159, P < 0.001) and high school students (19.0% versus 13.5% in middle school students; χ2 = 45.437, P < 0.001). Overall, 7.6% experienced emotional crises during the COVID-19 pandemic, which was more prevalent in girls (10.1% versus 5.2% in boys; χ2 = 71.025, P < 0.001) and in high school students (8.8% versus 6.7% in middle school students; χ2 = 12.996, P < 0.001). Depression and anxiety was seen in 19.8% and 12.3% of students during the COVID-19 pandemic, respectively. The risk factors for depression and anxiety included unbearable stress before the COVID-19 pandemic (P < 0.001), mental health (P = 0.044), and age (P = 0.040), whereas resilience was identified as a protective factor for depression and anxiety (P = 0.001). Conclusion: Students in Daegu experienced lots of mental difficulties since the COVID-19 pandemic. It will be necessary to improve stress management and resilience to improve students' mental health in disasters such as the COVID-19 pandemic.