ATP meter를 이용한 초음파 탐촉자의 오염도 분류

하명진,김정구,Ha, Myeong-Jin,Kim, Jeong-Koo 대한방사선과학회 2020 방사선기술과학 Vol. No.

In this study, the contamination level was measured using an ATP meter using adenosine triphosphate bioluminescent material to find effective infection control to compensate for the disadvantages of the microbial culture method used for hygiene control of ultrasound probe. The convex probes were selected from six ultrasound probe in the hospital, and the samples were taken in real time before and after cleaning to check the contamination of the probe. In order to classify the pollution degree using the APT meter was classified by category. A total of 78 samples were collected from the ultrasound probe. When the pollution levels before and after cleaning were classified by category, 76.6% of the samples were classified into category 3·4 before cleaning, but they decreased to 23.3% after cleaning. 13.3% before cleaning was in category 1, but increased to 43.3% after cleaning. By classifying the pollution level, it was confirmed that the pollution level was significantly reduced by category. Until now, there was no suitable criterion for determining the contamination level by using ATP meter in medical machines where sample area is small and reused. In this study, criteria for each category were set to measure the contamination level of ATP meter suitable for small sample area such as ultrasound probe, so that contamination level could be determined in real time at the site. Therefore, it is considered that hygiene management for ultrasound probe can be more actively performed.

무도수업 참여가치와 대학생의 스포츠인성, 사회탄력성 관계분석

하명진(Ha, Myeong-Jin),강형숙(Kang, Hyung-Sook) 한국무예학회 2023 무예연구 Vol.17 No.3

초음파 탐촉자의 위생관리에 관한 연구

하명진(Ha Myeong-Jin),김정구(Kim Jeong-Koo) 대한방사선과학회(구 대한방사선기술학회) 2020 방사선기술과학 Vol.43 No.2

This study examined the hygiene management of ultrasound probes by examining the cleaning tools for hygiene management of ultrasound probes, the presence or absence of wearing glove as a personal protective equipment, and the awareness of ultrasound probe hygiene. Parts 154 questionnaire about people working in the ultrasound room were surveyed and analyzed. The single gel removal tool of the ultrasound probe was most frequently used with a 48.7% cotton towel, and for double gel removal tools, the first gel removal tool was 42.4% cotton towel and the second gel removal tool was used with 57.6% wet tissue. Antimicrobial wipes were the most commonly used drug and instrument used in ultrasound hygiene management at 58.4%. According to the survey of the presence or absence of wearing glove during ultrasound examination, 46.8% were found to be unworn. When examining the intracavity ultrasound, 30.9% of those who do not wear glove and 61.0% of hygiene awareness of ultrasound probes are ‘normal’. According to age, ultrasound probe gel removal tool was not significant difference(p>0.05). According to the working organization and the working department, it was significant difference to wearing gloves during ultrasound examination(p<0.05). Therefore, in order to properly sanitize the ultrasound probe, it is considered that a guideline for hygiene management of the ultrasound probe that fits the situation in Korea is necessary, and it is considered that thorough hygiene management training for inspector is necessary for efficient hygiene management of the ultrasound probe.

공명현상을 이용한 유방조직 팬텀의 석회화 관찰

하명진(Myeung-Jin Ha),김정구(Jeong-Koo Kim) 대한방사선과학회(구 대한방사선기술학회) 2008 방사선기술과학 Vol.31 No.1

유방초음파 검사는 유방암 검사에 있어 유방촬영술에 비하여 많은 장점이 있으나, 미세석회화 발견에는 적합하지 않은 단점이 있다. 이에 유방초음파 검사에서 기존의 7.5MHz 선형 탐촉자를 사용하여 매질의 공명현상을 이용한 유방조직 석회화 병변을 관측할 수 있는 방법을 연구하였다. 먼저 gelatin과 돼지 젖가슴살을 이용하여 유방조직 팬텀을 제작하였으며, 외부 진동을 변화시켜 가며 석회화 병변을 관측하였다. 유방조직 팬텀 안에 주입된 석회화는 주변 조직과 다른 공명을 일으키면서 외부진동에 따라 음향공명의 정도가 파워도플러의 ROI 영역 내의 색상의 밝기와 영역의 차이로 나타내었다. 낮은 주파수 영역에는 음향공명이 거의 나타나지 않았으며, 약 300~400Hz 사이에서 일정한 플래토우 영역을 나타내었으며, 이후 주파수가 증가함에 따라 색상이 사라짐을 확인하였다. Diagnosis of breast ultrasound is better than mammography in the early detection of breast cancer, but, it is difficult to detect microcalcification. We studied on detection for calcification of breast tissue using acoustic resonance and power doppler with 7.5MHz linear probe in breast ultrasound. We first constructed breast tissue phantom made of gelatin and saw breast, and then observed calcification by the change of external vibration. Calcification injected breast tissue phantom visualized the difference for brightness and region of color in ROI regions of power doppler. Acoustic resonance almost never visualized in low frequency regions, plateau constituted in about 300-400Hz and colors vanished according to the increase of frequency.

태권도 지도자 유형에 따른 여가만족 및 여가활동 제약에 대한 탐색적 분석 연구

하명진(Myeong-Jin Ha),강형숙(Hyung-Sook Kang) 학습자중심교과교육학회 2023 학습자중심교과교육연구 Vol.23 No.4

Objectives This study was intended to provide basic data for improving work and QOL of Taekwondo leaders through an exploratory analysis of leisure satisfaction and leisure activity restrictions according to the types of Taekwondo instructors. Methods This study is a study on the leisure satisfaction and leisure activity constraints of Taekwondo instructors. Research subjects were selected through intentional sampling and 128 copies of data were analyzed using the SPSS statistical program. Exploratory factor analysis and reliability analysis were conducted to measure validity and reliability, and t-test, one-way ANOVA, and correlation analysis were conducted for data processing. Results This study is a study on leisure satisfaction and leisure activity restrictions according to the type of Taekwondo instructor, and the results of the difference verification and correlation analysis between groups are as follows. First, as a result of verifying the difference according to the Taekwondo instruction target, the life sports group was found to be statistically (.05) higher than the group that combined life sports and elite sports in the personal restriction factor among the leisure activity constraints. Second, as a result of verifying the difference according to the Taekwondo instructor's career, there were statistically significant differences in social satisfaction, psychological satisfaction, and environmental satisfaction factors in leisure satisfaction factors, and personal constraints, facility and program constraints in leisure activity constraint factors. there was a statistically significant (.05) difference in the time constraint factor. Third, as a result of verifying the difference according to the teaching experience of Taekwondo instructors, there was no statistically significant difference (.05) only in the environmental satisfaction factor among leisure satisfaction factors. Fourth, as a result of correlation analysis of the influence of taekwondo instructors' leisure activity constraints on leisure satisfaction, personal constraints among leisure activity constraints were found in all factors of leisure satisfaction, and facility and program constraints were psychological factors and In the environmental factors, time constraints had a statistically significant (.05) effect on the physical satisfaction factors of leisure satisfaction, and social constraint factors on the psychological satisfaction factors of leisure satisfaction. Conclusions Based on this study, it is judged that there will be a continuous need for analysis and research on leisure types and leisure satisfaction according to age, player experience, teaching experience, and teaching subject of taekwondo instructors. It is also expected to have a positive impact psychologically, physically, and socially. 목적 태권도 지도자의 유형에 따른 여가만족 및 여가활동 제약에 대한 탐색적 분석을 통해서 태권도 지도자들의 업무 및 QOL 향상을 위한 기초적인 자료를 제공하고자 하였다. 방법 본 연구는 남자 태권도 지도자를 연구대상자를 선정하여 의도적 표집을 통해 128부의 자료를 SPSS 27.0 프로그램을 사용하여 분석하였다. 타당도와 신뢰도 측정을 위해 탐색적요인분석 및 신뢰도 분석을 실시하였으며, 집단간의 차이를 알아보기 위해 t검정과 일원변량분석을 여가만족과 여가활동 제약 요인간의 관계를 알아보기 위해 상관분석을 실시하였다. 결과 본 연구결과는 다음과 같다. 첫째, 지도대상에 따른 차이검증 결과, 여가활동 제약요인 중 개인적제약 요인에서 생활체육 집단이 생활체육과 엘리트체육을 병행하는 집단보다 통계적으로(.05) 높은 것으로 나타났다. 둘째, 선수경력에 따른 차이검증 결과, 여가만족 요인에서는 사회적만족, 심리적만족, 환경적만족 요인에서 통계적으로 유의한 차이가 나타났으며, 여가활동 제약요인에서는 개인적제약, 시설 및 프로그램제약, 시간적제약 요인에서 통계적으로(.05) 유의한 차이가 나타났다. 셋째, 지도경력에 따른 차이검증 결과, 여가만족 요인 중 환경적만족 요인에서만 통계적으로(.05) 유의한 차이가 나타나지 않았다. 넷째, 여가활동 제약요인이 여가만족에 미치는 영향을 상관관계 분석한 결과, 여가활동 제약요인 중 개인적제약은 여가만족의 모든 요인에서, 시설 및 프로그램의 제약요인은 여가만족의 심리적만족 요인과 환경적만족 요인에서, 시간적제약은 여가만족의 신체적만족 요인에서, 사회적제약 요인은 여가만족의 심리적만족 요인에서 통계적으로(.05) 유의한 영향이 나타났다. 결론 본 연구를 바탕으로 추후, 태권도 지도자의 연령, 선수경력, 지도경력, 지도대상에 따른 여가유형과 여가만족에 관한 분석 연구가 지속적으로 필요할 것으로 판단되며, 지도자의 여가활동은 지도자의 도장경영 및 관리뿐만 아니라 심리적, 신체적, 사회적으로 긍정적인 영향을 미칠 것으로 기대된다.

태권도 유네스코 인류무형문화유산 등재 추진단의 역할과 협력방안 연구

하명진(Ha, Myeong-Jin),용진삼(Yong, jin-sam),강형숙(Kang Hyung-Sook) 한국무예학회 2024 무예연구 Vol.18 No.2

태권도 자유품새 장년부 채점방안에 관한 연구

하명진(Ha, Myeong-Jin),강형숙(Kang, Hyung-Sook) 한국무예학회 2022 무예연구 Vol.16 No.4

본 연구는 자유품새 장년부 도입시 채점방안에 관한 연구로 장년부 선수들이 가장 멋지게 태권도 품새를 표현하고 구성할 수 있도록 채점항목의 개정과 기술력 항목의 수정에 기초적인 자료를 제시하고자 태권도 품새종목(선수, 지도자, 심판) 전문가 9명을 연구참여자로 선정하여 다음과 같은 결론을 얻었다. 첫째, 태권도 자유품새 장년부 도입시 채점항목 개정에 대한 심층면담 결과, 연구참여자 9명 중 8명이 찬성하였으며 반대한 1명의 참여자도 60대 이상의 선수들에게는 필요하다는 찬성의 의견을 나타내었다. 둘째, 태권도 자유품새 장년부 도입시 변화가 필요한 채점항목에 대한 심층면담 결과, 모든 참가자가 기술력 채점항목의 개정이 필요하다는 의견을 나타내었다. 셋째, 태권도 자유품새에 장년부가 도입될 경우, 기술력 채점항목에 들어갈 필수동작에 대한 심층면담 결과, 먼저 현재 시행되고 있는 발차기 동작의 항목 축소와 난이도 조절이 필요하다는 의견이 대다수를 차지하였고 태권도 기술을 표현할 수 있는 손기술과 고단자 품새에 나오는 특수 동작의 삽입과 강하고 부드러운 연합동작이 필요하다는 의견을 나타내었다. 따라서 추후 태권도 자유품새의 발전과 장년부 종목의 성공적인 대회를 위해서 태권도 고유 동작들의 계승과 화려함만 추구하는 품새가 아닌 태권도 기술의 장이 될 수 있는 동작표현에 대한 다각적인 연구를 통해 장년부 선수에 맞는 채점기준과 필수동작에 대한 지속적인 노력이 필요할 것으로 사료된다. This study is a study on the scoring method when the free poomsae senior team is introduced, and it is intended to present basic data on the revision of the scoring items so that the senior players can express and compose the taekwondo poomsae in the most stylish way. Nine experts in Taekwondo poomsae events (athletes, coaches, referees) were selected as the study participants and the following conclusions were obtained. First, as a result of an in-depth interview on the revision of scoring items when Taekwondo Free Poomsae was introduced, 8 out of 9 study participants agreed. However, one participant who objected also expressed an opinion in favor of the need for players over 60. Second, as a result of an in-depth interview on the scoring items that need to be changed when introducing the Taekwondo Free Poomsae Senior Club, all participants expressed the opinion that the technical scoring items need to be revised. Third, when the Taekwondo Free Poomsae Division is introduced, as a result of the in-depth interview on the essential movements to be included in the skill scoring items, the majority of opinions were that it is necessary to reduce the items and adjust the difficulty of the kicking movements that are currently being implemented. Therefore, for the future development of Taekwondo free poomsae and successful competitions in adult sports, multifaceted research on movement expression that can be a place for Taekwondo technique, not poomsae, which pursues only splendor and succession of Taekwondos unique movements, should be continuously conducted.

ATP meter를 이용한 초음파 탐촉자의 오염도 분류

하명진(Ha Myeong-Jin),김정구(Kim Jeong-Koo) 대한방사선과학회(구 대한방사선기술학회) 2020 방사선기술과학 Vol. No.

In this study, the contamination level was measured using an ATP meter using adenosine triphosphate bioluminescent material to find effective infection control to compensate for the disadvantages of the microbial culture method used for hygiene control of ultrasound probe. The convex probes were selected from six ultrasound probe in the hospital, and the samples were taken in real time before and after cleaning to check the contamination of the probe. In order to classify the pollution degree using the APT meter was classified by category. A total of 78 samples were collected from the ultrasound probe. When the pollution levels before and after cleaning were classified by category, 76.6% of the samples were classified into category 3·4 before cleaning, but they decreased to 23.3% after cleaning. 13.3% before cleaning was in category 1, but increased to 43.3% after cleaning. By classifying the pollution level, it was confirmed that the pollution level was significantly reduced by category. Until now, there was no suitable criterion for determining the contamination level by using ATP meter in medical machines where sample area is small and reused. In this study, criteria for each category were set to measure the contamination level of ATP meter suitable for small sample area such as ultrasound probe, so that contamination level could be determined in real time at the site. Therefore, it is considered that hygiene management for ultrasound probe can be more actively performed.

공명현상과 파워도플러를 이용한 유방조직 팬텀의 미세 석회화 병변 진단

김정구,하명진,Kim, Jeong-Koo,Ha, Myeung-Jin 한국음향학회 2008 韓國音響學會誌 Vol.27 No.2

유방초음파 검사는 유방암 검사에 있어 유방촬영술에 비하여 많은 장점이 있으나, 미세석회화 발견에는 적합하지 않은 단점이 있다. 이에 유방초음파 검사에서 기존의 7.5 MHz 선형 탐촉자를 사용하여 파워도플러와 매질의 공명현상을 이용한 유방조직 석회화 병변을 관측할 수 있는 방법을 연구하였다. 먼저 gelatin을 이용하여 유방조직 팬텀을 제작하였으며, 외부 진동을 변화시켜 가며 석회화 병변을 관측하였다. 유방조직 팬텀 안에 주입된 석회화는 주변 조직과 다른 공명을 일으키면서 외부진동에 따라 음향공명의 정도가 파워도플러의 ROI 영역 내의 색상의 밝기와 영역의 차이로 나타내었다. 낮은 주파수 영역에는 음향공명이 거의 나타나지 않았으며, 약 $300{\sim}600\;Hz$ 사이에서 일정한 플래토우 영역을 나타내었으며, 이후 주파수가 증가함에 따라 색상이 사라짐을 확인하였다. Breast ultrasound has many advantages over mammography but suffers from a shortcoming of being not suitable in detecting microcalcification. We studied on a method based on acoustic resonance and power Doppler to detect calcification of breast tissue using a typical 7.5 MHz linear probe used in breast ultrasound examination. We first constructed a breast tissue phantom made of gelatin and then observed calcified legions as external vibrations varied. Calcification injected to the breast tissue phantom being resonated different from the surrounding medium, and its acoustic resonance driven by external vibrations was visualized by differences for color brightness and area in ROI of power doppler. In low frequency regions, the acoustic resonance almost not appeared and showed a plateau in $300{\sim}600\;Hz$ and the color vanished as the frequency further increased.

보문 : 주얼리 충동구매에 영향을 미치는 요인에 관한 연구

박은주 ( Eun Joo Park ),하명진 ( Myung Jin Ha ) 韓國衣類學會 2008 한국의류학회지 Vol.32 No.3