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핵의학 적용을 위한 광섬유 기반의 알파/베타 검출기의 제작 및 특성분석
홍승한 ( Seung Han Hong ),유욱재 ( Wook Jae Yoo ),신상훈 ( Sang Hun Shin ),서정기 ( Jeong Ki Seo ),한기택 ( Ki Tek Han ),전다영 ( Da Yeong Jeon ),조승현 ( Seung Hyun Cho ),이봉수 ( Bong Soo Lee ) 한국센서학회 2012 센서학회지 Vol.21 No.5
We fabricated a fiber-optic alpha/beta detector, which is composed of a sensing probe, a plastic optical fiber, a photomultiplier tube, and a multichannel analyzer, to obtain the energy spectra of radioactive isotopes. As inorganic scintillators of a sensing probe, a ZnS (Ag) film was coupled with a CaF2 (Eu) crystal for alpha and beta spectroscopy. In this study, 210Po and 90Sr were used as alpha and beta sources, respectively, and we measured the radiation energy spectra using a fiber-optic alpha/beta detector to identify alpha and beta emitting radionuclides for nuclear medicine application. Also, the variations of energy spectrum were obtained according to the length of plastic optical fiber.
유도 선수가 인지한 통제적 코칭행동과 그릿, 마인드셋, 승부근성의 구조적 관계
홍승한(Hong, Seung-Han),최관용(Choi, Kwan-Yong) 한국체육과학회 2021 한국체육과학회지 Vol.30 No.5
The purpose of this study was to investigate the relationship between controlling coaching behavior perceived by judo athletes, grit, mindset, and competition, and to verify the mediating effect of grit and mindset in the relationship between coaching behavior and judo players" tenacity. In order to achieve these research aims, high school and university judo athletes who were registered in the Korea Judo Association in 2020 were recruited as the research participants. A total of 570 participants completed the Internet Google survey and a questionnaire that was verified for validity and reliability in the literature was used as a survey tool. Based on the collected data, exploratory factor analysis, descriptive statistics, correlation analysis, t-test, one-way ANOVA, and SPSS process macro were used to analyze parallel multiple mediation effects using SPSS 21.0. and the results are as follows. First, it was found that the controlling coaching behavior perceived by judo athletes negatively(-) affected the grit and growth mindset, and positively(+) affected fixed mindset. All of the sub-factors of the controlling coaching behavior were found to have no significant effect on the tenacity. Second, the grit played a mediating role in the relationship between the controlling coaching behavior perceived by the judo athletes and the tenacity. Third, it was found that the growth mindset played a mediating role and the fixed mindset had no mediating effect in the relationship between the controlling coaching behavior perceived by the judo players and the tenacity.
건축물에 사용된 석면함유물질(ACMs)의 조사 및 위해성 평가
김홍관 ( Hong-kwan Kim ),천영우 ( Young Woo Chon ),노영만 ( Young Man Roh ),홍승한 ( Seung-han Hong ),김치년 ( Chi-nyon Kim ),이익모 ( Ik-mo Lee ) 한국산업보건학회 (구 한국산업위생학회) 2018 한국산업보건학회지 Vol.28 No.1
Objectives: The objectives of this study are to research the usage characteristics of asbestos-containing building materials and to conduct exposure risk assessment by applying no. 2016-230 “Methods of Risk Assessment of Asbestos-Containing Buildings” from the Ministry of Environment. Methods: One hundred buildings located in the Seoul and Gyeonggi-Incheon area were chosen, with 29 in Seoul, 20 in Incheon, and 51 in Gyeonggi-do Province. The year of construction was divided between three buildings in the 1970s, 11 buildings in the 1980s, 42 buildings in the 1990s, and 44 buildings in the 2000s. The bulk samples were analyzed by using a polarizing microscope after a pre-process using a stereomicroscope in a hood with an HEPA filter. This study defined ACMs (asbestos-containing materials) as asbestos when the content percentage was over 1% in the analysis result. Methods and standards of risk assessment of asbestos-containing building materials were conducted by refering to no. 2016-230 “Method of Risk Assessment of Asbestos-Containing Buildings” from the Ministry of Environment. The risk of exposure to ACMs was rated by a score based on three categories (high, middle, low risk of asbestos exposure). Results: In this study, 30 of the 100 buildings and 36 of the 416 bulk samples (8.6%) were found to have had asbestos. Asbestos was detected at a high rate, in 18 out of 42, in buildings constructed in the 1990s and at the lowest rate (7 out of 44) for buildings constructed in the 2000s. As a result of the evaluation according to no. 2016-230 “Method of Risk Assessment of Asbestos-Containing Buildings” of the Ministry of Environment, the risk assessment level of two asbestos-containing building materials was found to be “Medium”, and 28 buildings materials were found to be at the “Low” level. Conclusion: As asbestos is regulated by the government, it is required to conduct active management and implemention by introducing methods of risk assessment of asbestos exposure that are supported by data from various situations. In the case of buildings owned by individuals, building owners should be aware of the risk of exposure to asbestos.
대학 유도선수의 승부근성과 운동몰입 및 그릿(Grit)의 관계
전승훈 ( Seung-hun Jeon ),홍승한 ( Seung-han Hong ) 한국체육대학교 체육과학연구소 2021 스포츠사이언스 Vol.39 No.2
이 연구는 대학 유도선수의 승부근성과 운동몰입 및 그릿(Grit)의 관계를 검증하는데 목적이 있다. 이러한 목적을 달성하기 위한 연구대상은 대한유도회에 선수 등록이 되어 있는 대학 유도선수 235명에게 설문지를 통해 자료를 수집하였다. 수집된 자료는 통계 프로그램 SPSS Version 21.0을 통해 빈도분석, 탐색적 요인분석 및 Cronbach's α 계수 산출, 상관관계분석, 다중회귀분석을 활용한 결과, 다음과 같은 결론을 도출하였다. 첫째, 대학 유도선수의 승부근성은 운동몰입에 정적(+)인 영향을 미치는 것으로 나타났다. 둘째, 대학 유도선수의 승부근성은 그릿(Grit)에 정적(+)인 영향을 미치는 것으로 나타났다. 셋째, 대학 유도선수의 운동몰입은 그릿(Grit)에 정적(+)인 영향을 미치는 것으로 나타났다. The purpose of this study is to verify the relationship between tenecity, exercise commitment and grit of university judo athletes. To this end, data were collected by administering questionnaires to 235 professional university judo athletes registered in Korea Judo Association (KJA). Frequency analysis, exploratory factor analysis, Cranach’s α coefficient estimation, correlation analysis, and multi-regression analysis were conducted to find the following results by using SPSS Version 21.0. First, university judo athlete' tenecity had a positive effect on exercise commitment. Second, university judo athlete' tenecity had a positive effect on grit. Third, university judo athlete' exercise commitment had a positive effect on grit.
유도 지도자의 통제적 코칭행동이 훈련관여 및 지도자-선수 관계에 미치는 영향
최관용(Choi, Kwan-Yong),홍승한(Hong, Seung-Han) 한국체육과학회 2019 한국체육과학회지 Vol.28 No.1
The primary objectives of this study are 1) to clarify the impact of controlling coaching style of Judo coaches on training engagement and Coach-Athlete relationship and 2) to contribute to coaching development. To achieve the research aims, high school and college Judo players who are registered as athletes in the Korea Judo Association were selected as the participants for the current study. A total of 395 questionnaires were collected with the convenience sampling method. The questionnaire items that were used in the previous studies related to the impact of controlling coaching style of Judo coaches on training engagement and coach-athlete relationship were modified and complemented to meet the purpose of this study via the experts’ agreement. The researcher explained the purpose of the current study and the procedure to the Judo coaches at high schools and college and then visited each selected high school and college to distribute and collect the questionnaire. The results were analyzed employing exploratory factor analysis, reliability analysis, correlation analysis, and multiple regression analysis using the SPSS 21.0 version statistical program. As the results, the following conclusion was derived. First, the controlling coaching style of the Judo coaches has a significant effect on the training engagement. Secondly, the controlling coaching style of the Judo coaches has a significant effect on the Coach-Athlete relationship. Thirdly, the training engagement of judo Athletes has a significant effect on the Coach-Athlete relationship.
이용진(Yong-jin,Lee),홍승한(Seung-han, Hong),김세형(Se-hyung, Kim),김승은(Seung-en, Kim),임영욱(Young-wook Lim) 한국위험물학회 2018 한국위험물학회지 Vol.6 No.1
This study utilizes an perception survey result of EDCs(Endocrine Disrupting Chemicals), and in order to compare the difference between EDCs perception levels as per smokers and nonsmokers. About 2,000 Korean citizens were surveyed, and were classified into smokers or nonsmokers, and afterwards, perception upon EDCs were comparatively analyzed. As a result of the analysis, overall, nonsmokers appeared to have a better awareness of EDCs. This study can be used as a base line data in terms of risk communication of EDCs.