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L2-norm과 L1-norm을 사용한 파형역산에서의 일반적인 목적함수와 로그 목적함수 비교연구
윤병준,신창수 한국자원공학회 2010 한국자원공학회지 Vol.47 No.2
Waveform inversion involves the estimation of the parameters of a postulated earth model from a set of observation data. This process is essential for geophysical exploration finding specific structures, such as a salt dome which implies the potential existence of the oil and gas. In this study, we compare the conventional objective function to the logarithmic objective function applying both L2-norm and L1-norm in the waveform inversion. We test a simple velocity model including high velocity region. We have focused on stability of decreasing error and accuracy of inverted result. This study shows that there was little difference in the accuracy of the inverted results between two methods. However, the waveform inversion with the logarithmic objective function gives us better result in terms of stability of decreasing error. 파형 역산은 탄성파 탐사 자료로부터 지구 내부의 변수들을 추정하여 지하구조를 복원시키는 기술이다. 이 기술은 석유탐사단계에서 유망구조가 되는 암염 돔과 같은 특정한 구조를 찾는데 중요한 역할을 하고 있다. 본 논문에서는 일반적인 목적함수와 로그 목적함수를 L2-norm, L1-norm을 모두 적용하여 파형 역산을 비교 연구해 보았다. 비교 연구를 위해 중앙에 고속도층이 있는 간단한 모델에 대해서 두 가지 목적함수를 적용하여 파형 역산을 시행하였다. 역산이 진행됨에 따라 오차 감소의 안정성과 역산 결과의 정확성을 비교했다. 파형 역산의 결과에 따르면 두 가지 방법의 정확성은 우열을 가리기 어려웠다. 그러나 오차의 안정성의 경우 로그 목적함수를 사용한 역산이 더 나은 결과를 보였다.
우리나라의 스포츠마사지 자격 인증에 관한 실태 분석 및 공인 자격제도 도입을 위한 과제
윤병준 한국스포츠리서치 2008 한국 스포츠 리서치 Vol.19 No.4
본 연구의 목적은 우리나라 스포츠마사지의 발전을 위해 스포츠마사지사 자격을 공인하는 제도의 도입이 필요함을 인식하며, 국내․외의 스포츠마사지사 자격 제도 및 공인 자격제도의 관계 법령과 실태를 살펴 스포츠마사지사 자격의 공인 제도 도입을 위한 과제를 제언하는데 있다. 이에 따라 스포츠마사지의 의의와 발전과정, 자격의 개념과 기능 및 21세기 사회에서 자격이 갖는 의미, 우리나라 자격제도의 발전과정과 운영 현황, 자격제도와 관련한 국가적 책무, 외국의 자격제도 운영 실태 및 시사점, 우리나라의 자격제도 운영 실태 및 스포츠마사지 자격을 둘러싼 법적 논쟁의 실체, 자격제도의 문제점을 문헌연구를 통해 규명한 뒤 우리나라에 스포츠마사지 공인 자격제도를 도입하기 위해 필요한 과제를 제시하고자 한다. 스포츠마사지 및 자격제도와 관련한 이론적 배경을 검토하고, 국내․외 자격제도의 실태를 분석한 결과 다음과 같은 세 가지 문제점을 찾아내었다. 첫째, 공신력이 미흡한 민간단체가 스포츠마사지사 자격증을 남발하여 국민 건강을 해칠 우려가 있다. 둘째, 스포츠마사지사 입직을 희망하는 사람들이 지불하는 자격연수비용과 무자격자 양산에 따른 악화된 건강의 회복에 소요되는 비용이 커 국민 경제에 미치는 부정적인 파급효과도 엄청날 것이다. 마지막으로, 스포츠마사지는 안마와는 상이함에도 현행 「안마사에 관한 규칙」에는 안마와 마사지를 구분하고 있지 않아 일반인들의 직업선택의 자유를 제한하여 기본권을 침해하고 있다. 이러한 문제점은 결국 스포츠마사지사의 국가 공인 자격제도의 도입을 통해 해결이 가능하며, 스포츠마사지 공인 자격제도를 도입하기 위해 필요한 과제로 다음의 세 가지를 제시한다. 첫째, 안마사와 스포츠마사지사가 병립하여 공존할 수 있는 정책의 마련이 시급하다. 둘째, 유사의료행위를 활성화하여 그 기반을 조성해 나갈 필요가 있다. 마지막으로, 기존의 스포츠마사지사 자격 발급 민간단체를 국가자격체계(National Qualifications Framework) 내에 편입시켜 사회 자본화할 필요가 있다.
C.M.I.에 의한 일부대학생(一部大學生)들의 건강상태(健康狀態)에 관(關)한 조사연구
윤병준,Jun, Yoon Byoung 한국학교보건학회 1989 韓國學校保健學會誌 Vol.2 No.1
To evaluate the college students' health status, the author distributed C.M.I. to 233 college students consisting of 102 males and 131 females who randomly selected from a college in seoul. The conclusion are as follow: 1. The mean of CMI scores for the male students was 32.84 and that for the female students was 43.25. Statistical significant difference was observed between the mean of CMI scores for male students and that for female students. 2. For male students, The CMI mean scores for the day students was 29.46 and for evening students was 35.85. There was no statistical significant difference the day students and that for the evening students. 3. For female students, the mean of CMI scores for day students was 42.40 and that for the evening students was 44.64. But there was no statistical significant difference between the mean CMI scores for the day students and that for the evening students. 4. In both female and male groups, the affirmative response rate of inadequacy, fatigability and eyes and ears are higher than any of the other items. 5. In comparing the CMI items of male students and female students, the significant differences cardiovascular system, musculoskeletal system, skin, nervous system, genitourinary system, fatigability, habits, inadequacy, depression and tension. The mean scores for female students, with the exception of habits, were higher than those for male students. 6. In comparing the CMI items of male day students and male evening students, there was significant difference in the items of the cardiovascular system, digestive tract, skin, genitourinary system, inadequacy, and anger : the mean scores of evening male students were higher than those of day students. 7. In the case of female students, the CMI mean scores of the evening students in the categories eyes and ears, cardiovascular system, digestive tract, musculoskeletal system, skin, genitourinary system, fatigability, inadequacy, depression, anxiety, and sensitivity were higher scores than those of the day students. However, the were no significant difference between both groups except in the cathgory of habits. 8. The frequency rate of neurotic students, who were identified by fukamachi's classification, were 12.5% in the day male students, 18.6% in th evening male students, 13.6% in the day female students, and 18.0% in the evening female students.
중・고등학생들의 인구사회경제적 특성, 건강관련행위 및 주관적 건강인지가 학업성취도에 미치는 영향
윤병준 한국학교·지역보건교육학회 2019 한국학교지역보건교육학회지 Vol.20 No.3
Objectives: The purpose of this study was to examine whether demographic and socio-economic characteristics, health behaviors and health status are related to academic achievement in Korean adolescents. Methods: Data from the 14th Korea Youth Risk Behaviors web-based Survey(KYRBWS) administered in 2018 were analyzed; 60,040 students in middle and high school participated in the survey. It was conducted frequency analysis, Rao-Scott chi-square test and multiple logistic regression analysis after adjusted for variables such as age, school grade. Results: The significant influencing factors on academic achievement were family economic status, living with parents, subjective health status, smoking experience, alcohol use experience, eating breakfast, sleeping, internet use during weekdays, depressive symptom(p<.001). The odds ratio for achieving higher academic achievement compared with those who never smoked was 1.50(p<.001). Conclusion: I found that students’ undesirable health behaviors affect their academic performance. To improve academic achievement, I recommend intervention programmes such as school health promotion that reduce undesirable health related behaviors. Objectives: The purpose of this study was to examine whether demographic and socio-economic characteristics, health behaviors and health status are related to academic achievement in Korean adolescents. Methods: Data from the 14th Korea Youth Risk Behaviors web-based Survey(KYRBWS) administered in 2018 were analyzed; 60,040 students in middle and high school participated in the survey. It was conducted frequency analysis, Rao-Scott chi-square test and multiple logistic regression analysis after adjusted for variables such as age, school grade. Results: The significant influencing factors on academic achievement were family economic status, living with parents, subjective health status, smoking experience, alcohol use experience, eating breakfast, sleeping, internet use during weekdays, depressive symptom(p<.001). The odds ratio for achieving higher academic achievement compared with those who never smoked was 1.50(p<.001). Conclusion: I found that students’ undesirable health behaviors affect their academic performance. To improve academic achievement, I recommend intervention programmes such as school health promotion that reduce undesirable health related behaviors.
윤병준,이준협 한국보건통계학회 2000 보건정보통계학회지 Vol.25 No.1
The goal of this study was to review the composite health measures through ralated articles. Increasing concem with the quality of gains in life years has led to the development of a new synthetic indicator of population, namely health expectancy. The health expectancy can be defined as the expected years for which one doesn't feel any discomfort or pain due to morbidities and disabilities. A large number of artcles about health expectancy had been published. I classified health expectancy indicators and criticized them. The results are as follows: