유연체 로터-커플링-블레이드 시스템의 로터 축과 블레이드의 연성 진동에 관한 연구

오병영(Oh, Byung-Young),이선숙(Lee, Sun-Sook),윤형원(Yoon, Hyungwon),차석주(Cha, Seog-Ju),나성수(Na, Sungsoo) 한국소음진동공학회 2005 한국소음진동공학회 논문집 Vol.15 No.9

In this paper, a dynamic model for the rotor shaft-coupling-blade system was developed. The blades are attached to a disk and driven by an electric motor shaft which is flexible in torsion. We assumed that the shaft torsional flexibility was lumped in the flexible coupling which is usually adopted in rotor systems. The Lagrangian approach with the small deformation theory for both blade-bending and shaft-torsional deformations was employed for developing the equation of the motion. The Assumed Modes Method was used for estimating the blade transverse deflection. The numerical results highlight the effects of both structural damping of the system and the torsional stiffness of the flexible coupling to the dynamic response of the blade. The results showed strong coupling between the blade bending and shaft torsional vibrations in the form of inertial nonlinearity, stiffness hardening and softening.

식물 병원진균 Botrytis cinerea 가 생산하는 Endo - polygalacturonase 의 순수정제와 특성

김병영,이태호,나유진,정영륜,이창원,김재원 ( Byung Young Kim,Tae Ho Lee,Eu Gene Rha,Young Ryun Chung,Chang Won Lee,Jae Won Kim ) 한국균학회 1997 韓國菌學會誌 Vol.25 No.4

동조자이로스코프(DTG)의 견실 재평형 루프 설계

김병영(Byung-Young. Kim),이교일(Kyo- Il. Lee) 제어로봇시스템학회 1994 제어로봇시스템학회 국내학술대회 논문집 Vol.1 No.1

『대승기신론』에 나타난 발심과 수행의 교육적 의미

천병영 ( Byung Young Cheon ),송도선 ( Do Seon Song ),이경자 ( Kyung Ja Lee ) 교육철학회 2010 교육철학연구 Vol.48 No.-

배움에 뜻을 둔 사람은 그 출발점이 중요하다. 학습자는 자기의 마음가짐의 여하에 따라 배움의 내용과 깊이가 다르며 그 결과 또한 다르다. 불교에서는 깨달음을 향한 발심을 강조한다. 학습자는 현실의 고통을 인식하고 발심이라는 깨달음의 마음을 내며 이를 통해 수행이라는 방법을 가지고 구체적이며 실천적인 노력이 필요하다. 본 연구에서는 『기신론』에 나타난 발심과 수행을 살펴보고 그 교육적 의미를 살펴보고자 하였다. 『기신론』에 나타난 발심은 깨달음의 마음을 내는 것과 동시에 그것은 깨달음의 지속성을 담보할 수 있는 단계를 가지는 것으로 파악된다. 발심은 학습자의 수준에 따른 자기결정성으로서의 내재적 동기를 의미하는 것이며 현대교육에 있어서 동기지속성 개념에 시사점을 제공해 준다. 수행은 발심을 통해 깨달음을 성취하고자 하는 구체적인 실천 노력이며 모든 이들과 조화롭게 살아가는 민주시민으로서의 실천적 방법론이다. The one who aspires to learning needs to make an appropriate start. The content, depth and result of learning depend on the learner`s mind attitude. Buddhism puts great emphasis on inspiring mind toward enlightenment. The learner recognizes the agony of reality, makes heart for enlightenment through inspiring mind and through all this, he tries hard to make detailed and feasible effort through a means called practice. This paper tries to explore the inspiring mind and practice shown in 『The awakening of faith(in Mahayana)』 and examine its educational implication. The Inspiring mind shown in 『The awakening of faith(in Mahayana)』 seems to make heart for enlightenment and contains several steps in it which secure durability of enlightenment at the same time. Inspiring mind means intrinsic motivation for self-determination based on the learner`s level and it also offers following suggestions for notion of the durability of motivation in modern education. Practice is detailed effort to achieve enlightenment through inspiring mind and also a practical methodology as the learner tries to live harmoniously as a democratic citizen with other people.

인삼 추출물 함유 한방화장품이 건강한 성인 여성의 삶의 질에 미치는 영향에 관한 예비 연구; Skindex-16을 중심으로

조가영 ( Ga Young Cho ),박효민 ( Hyo Min Park ),권이경 ( Lee Kyung Kwon ),조성아 ( Sung A Cho ),강병영 ( Byung Young Kang ),김윤범 ( Yoon Bum Kim ) 대한화장품학회 2015 대한화장품학회지 Vol.41 No.4

본 연구에서는 건강한 성인 여성을 대상으로 인삼 추출물을 함유한 스킨케어 제품의 시료 제시 방법과 여성들의 삶의 질 개선 효과 간의 상관 관계를 분석하였다. 삶의 질이란 질병이나 건강 상태가 일상생활에 미치는 신체적, 정신적 그리고 사회적 영향에 대한 개인적인 반응을 나타내는 개념이다. 이에 저자들은 45명의 건강한 성인 여성을 두 그룹으로 나누어 한 그룹(Group A)에는 브랜드 고유의 패키지를 유지한 인삼 크림 시료를 제공하였고, 다른 그룹(Group B)은 브랜드와 제품명을 알 수 없는 하얀색 통에 담은 동일한 시료를 제공하여 8주간 사용하게 하였다. 피부 관련 삶의 질 평가는 Skindex-16 설문지를 사용하여 시험 초기와 4주 후, 8주 후에 걸쳐 시행되었다. 시험 참여를 중지한 2명의 피험자를 제외한 43명의 Skindex-16 초기값의 평균은 22.70 ± 4.82점이었다. 8주 후, 그룹 A의 Skindex-16 지표는 초기값 23.30 ± 5.14에서 20.20 ± 4.83으로, 그룹 B는 22.17 ± 4.58에서 20.52 ± 3.60로 통계적으로 유의한 정도로 개선되었다. 세부 항목에서는 그룹 A의 ‘증상’ 항목이 4주 후, ‘감정’ 항목이 8주 후에 통계적으로 유의하게 개선되었으며, ‘기능’ 항목은 어느 그룹에서도 통계적으로 유의한 변화가 관찰되지 않았다. 또한, 총합과 세부 항목 모두 측정 시기 및 그룹에 따른 교호작용은 통계적으로 유의한 차이가 확인되지 않았다. 본 실험을 통해 인삼 크림이 포함된 스킨케어가 건강한 성인 여성의 삶의 질에 긍정적인 영향을 줄 수 있음을 확인하였으며, 스킨케어 행위 자체가 패키지에 대한 영향보다 삶의 질의 개선에 주는 영향이 큼을 추측할 수 있다. 장기적으로 ‘삶의 질’이란 기존의 피부과학 지표의 개선과 주관적 만족도의 개념을 넘어 신규한 화장품 효능 영역으로 추가적인 연구가 필요할 것으로 생각된다. This study is designed to analyze the effect of skincare using cosmetic containing ginseng extract, on improving quality of life (QOL) of healthy women, with blind testing. QOL is a concept that represents how one’s disease or health condition can physically, psychologically, and socially influence his or her daily life. The study was conducted to assess the effect of a ginseng cosmetic preparation on quality of life (QOL) using the Skindex-16 score, stratified by blind versus non-blinded option. 45 healthy women aged between 30 and 49 years with no skin disease were recruited for this study. Volunteers were divided into two groups. Group A (n = 22) received anti-aging cream with ginseng extract in the original packaging, which included the brand name and logo. Group B (n = 23) received the same cream in a plain white jar without any package decoration or logo. Both groups used the cream for 8 weeks. For the skin-related QOL assessment, Skindex-16 was used at baseline, forth, and eighth week. All volunteers except two dropouts in Group A completed the dermatology-specific QOL measure, Skindex-16, at baseline, after 4 weeks, and after 8 weeks of treatment with the provided samples. As a result, the mean score of 43 participants at baseline was 22.70 ± 4.82. There was a significant difference between the baseline score and the score after 8 weeks in both groups: The scores changed from 23.30 ± 5.14 to 20.20 ± 4.83 in Group A, from 22.17 ± 4.58 to 20.52 ± 3.60 in Group B. The “Symptom” subscale of Skindex-16 improved after 4 weeks and the “Emotion” subscale improved after 8 weeks in Group A. The “Function” subscale did not show improvement in either groups. Both groups showed no interaction effect between follow up time and groups in Skindex-16 and subscale. This research opens up the possibility of skincare using ginseng cream having a positive effect on QOL in healthy women. Moreover, one can predict that skincare ritual itself may have greater impact on the improvement of QOL, compared to the product packaging.

유연체 로터-커플링-블레이드 시스템의 로터 축과 블레이드의 연성 진동에 관한 연구

이선숙(Sunsook Lee),오병영(Byung-Young Oh),윤형원(Hyungwon Yoon),차석주(Seog-Ju Cha),나성수(Sungsoo Na) 한국소음진동공학회 2005 한국소음진동공학회 학술대회논문집 Vol.2005 No.5

업종별 기업의 위기관리 차이에 관한 탐색적 연구

홍한국(Han-kuk Hong),강병영(Byung-Young Kang),우보현(Bo-hyun Woo),이봉구(Bong-Koo Lee) 한국IT서비스학회 2013 한국IT서비스학회지 Vol.12 No.4

Recently domestic companies have struggled to deal with different kinds of crisis accrued from various sources. However. their perception on the crisis and crisis management system are extremely vulnerable. In particular. although almost all companies have had many business related crisis. they have tended to ignore the crisis with simply considering it as unlucky and not to approach it provocatively in preparing some preventive measures and turning it into an opportunity due to the lack of recognizing the importance of risk management. In other words. domestic companies have not systematically prepared detailed plans for patential crisis. rather have tended to recognize the importance of having crisis management system after experiencing a detrimental crisis or accident. Furthermore research on the issue has conducted sparsely in the academic world. The purpose of this study was to investigate the differences among types of businesses in terms of the degree of crisis experienced previously, the perception on the importance of crisis management system. the level of crisis management implementation, and the areas of crisis management being focused in the future. Usable data was collected from 201 companies using an on-site survey. Data was analyzed with SPSS 21.0 using some descriptive statistics and a series of ANOVA (One-way Analysis of Variance). Results and implications were provided, along with some future research directions.

한방화장품이 건강한 성인 여성의 삶의 질에 미치는 영향에 관한 예비 연구

조가영,박효민,권이경,조성아,강병영,김윤범,Cho, Ga-Young,Park, Hyo-Min,Kwon, Lee-Kyung,Cho, Sung-A,Kang, Byung-Young,Kim, Yoon-Bum 대한한방안이비인후피부과학회 2015 한방안이비인후피부과학회지 Vol.28 No.4

Objective : The aim of this study is to assess the effect of Korean Herbal Cosmetic on quality of life (QoL) of Korean Herbal Cosmetics Using Dermatology Life Quality Index (DLQI) stratified by blind versus non-blinded option.Methods : Forty five healthy females aged 30's to 40's were recruited for this study. Volunteers were divided into two groups : Group A (n=22) was provided an anti-aging cream with ginseng extract in the original packaging including the brand name and logo. Group B (n=23) were provided same cream in a plain white normal jar without any package decoration or logo.Results : All females except two volunteers in group A completed a DLQI questionnaire, baseline, after 4 weeks and 8 weeks of treatment. The baseline of DLQI scores of all groups was 3.23±2.72. There was a significant difference in DLQI scores between before, 4 weeks and 8 weeks after in both groups ; The scores changed from 4.25±3.45 to 0.95±1.15 at 4 weeks, 1.00±1.72 at 8 weeks in group A, The scores of group B changed from 2.35±1.47 to 0.83±1.23 at 4 weeks, 0.65±0.98 at 8 weeks. But both had no interaction effect between follow up times and groups. Subscale DLQI scores improved after 4weeks were 'Symptoms and feelings', only in group BConclusions : Both groups showed significant improvements in QoL quality scores evaluated by DLQI. However, interaction was not observed for whether the participants knew the brand and content of the cream.

우리나라의 골반 및 요추 엑스선검사에서의 환자선량 권고량

이광용(Kwang-Yong Lee),이병영(Byung-Young Lee),이정은(Jung-Eun Lee),이현구(Hyun-Koo Lee),정승환(Seung-Hwan Jung),김병우(Byung-Woo Kim),김혁주(Hyeog-Ju Kim),김동섭(Dong-Sup Kim) 대한방사선과학회(구 대한방사선기술학회) 2009 방사선기술과학 Vol.32 No.4

목 적 : 골반 및 요추 엑스선검사는 진단 엑스선검사 중 생식선을 포함하고 있고 환자가 받는 방사선량이 많은 검사로서 우리나라에는 골반 및 요추 엑스선검사에서의 환자선량 권고량이 마련되어 있지 않다. 따라서 국내 의료기관에서 골반 및 요추 엑스선검사 시 환자가 받는 방사선량을 측정하여 평가하고 골반 및 요추 엑스선검사에서 환자의 방사선 방어 최적화를 위한 환자선량 권고량을 확립한다. 방 법 : 전국 125개 의료기관에서 골반 전후면 촬영, 요추 전후면 및 측면 촬영시 촬영조건과 진단영상정보를 조사 분석하고 환자가 받는 입사표면선량을 유리선량계를 사용하여 측정 평가한다. 환자가 받는 방사선량 중 제3사분위값에 해당하는 선량값을 의료기관에 권고할 골반 및 요추 엑스선검사에서의 환자선량 권고량으로 확립한다. 결 과: 전국 125개 의료기관에서 골반 및 요추 엑스선검사 시 진단영상정보를 조사하고 환자가 받는 입사표면선량을 측정한 결과 골반 전후면 엑스선검사에서는 관전압이 60~97kVp, 평균 75kVp를 사용하였고, 관전류-시간곱(mAs)는 8~123mAs, 평균 29.7mAs를 사용하였다. 요추 전후면 및 측면 엑스선검사에서는 관전압을 각각 65~100kVp, 평균 78kVp와 70~109kVp, 평균 87kVp를 사용하였고 mAs도 각각 10~100mAs, 평균 35.2mAs와 8.9~300mAs, 평균 64.1mAs를 사용하였다. 골반 및 요추 엑스선검사에서의 환자가 받는 입사표면선량을 측정한 결과, 골반 전후면 엑스선검사에서는 최소값 0.59mGy, 최대값 12.69mGy, 평균값 2.88mGy이었으며, 제1사분위값은 1.91mGy, 중앙값은 2.67mGy, 제3사분위값은 3.42mGy이었다. 요추 전후면 엑스선검사에서는 최소값 0.64mGy, 최대값 23.84mGy, 평균값 3.68mGy이었으며, 제1사분위값은 2.41mGy, 중앙값은 3.40mGy, 제3사분위값은 4.08mGy이었다. 요추 측면 엑스선검사에서는 최소값 1.90mGy, 최대값 45.42mGy, 평균값 10.08mGy이었으며, 제1사분위값은 6.03mGy, 중앙값은 9.09mGy, 제3사분위값은 12.65mGy이었다. 결 론 : 우리나라 의료기관에서 골반 전후면 엑스선검사에서 의료기관에 권고할 환자선량 권고량은 3.42mGy, 요추 전후면 엑스선검사에서는 4.08mGy, 요추 측면촬영에서는 12.65mGy로 세계보건기구 등 6개 국제기구가 공동으로 권고할 골반 전후면 10mGy, 요추 전후면 검사 10mGy 및 요추 측면 검사 30mGy보다는 낮았다. Purpose : pelvis and lumbar spine radiography, among various types of diagnostic radiography, include gonads of the human body and give patients high radiation dose. Nevertheless, diagnostic reference levels for patient radiation dose in pelvis and lumbar spine radiography has not yet been established in Korea. Therefore, the radiation dose that patients receive from pelvis and lumbar radiography is measured and the diagnostic reference level on patient radiation dose for the optimization of radiation protection of patients in pelvis and lumbar spine radiography was established. Methods : The conditions and diagnostic imaging information acquired during the time of the postero-anterior view of the pelvis and the postero-anterior and lateral view of the lumbar spine at 125 medical institutions throughout Korea are collected for analysis and the entrance surface dose received by patients is measured using a glass dosimeter. The diagnostic reference levels for patient radiation dose in pelvis and lumbar spine radiography to be recommended to the medical institutes is arranged by establishing the dose from the patient radiation dose that corresponds to the 3rd quartile values as the appropriate diagnostic reference level for patient radiation dose. Results : According to the results of the assessment of diagnostic imaging information acquired from pelvis and lumbar spine radiography and the measurement of patient entrance surface dose taken at the 125medical institutes throughout Korea, the tube voltage ranged between 60~97kVp, with the average use being 75kVp, and the tube current ranged between 8~123mAs, with the average use being 30mAs. In the posteroanterior and lateral views of lumbar spine radiography, the tube voltage of each view ranged between 65~100kVp (average use: 78kVp) and 70~109kVp (average use: 87kVp), respectively, and the tube current of each view ranged between 10~100mAs(average use: 35mAs) and between 8.9~300mAs(average use: 64mAs), respectively. The measurements of entrance surface dose that patients receive during the pelvis and lumbar spine radiography sho the following results: in the posteroanterior view of pelvis radiography, the minimum value is 0.59mGy, the maximum value being 12.69mGy and the average value is 2.88mGy with the 1st quartile value being 1.91mGy, the median being 0.59mGy, and the 3rd quartile value being 3.43mGy. Also, in the posteroanterior view of lumbar spine radiography, the minimum value is 0.64mGy, the maximum value is 23.84mGy, and the average value is 3.68mGy with the 1st quartile value being 2.41mGy, the median being 3.40mGy, and the 3rd quartile value being 4.08mGy. In the lateral view of lumbar spine radiography, the minimum value is 1.90mGy, the maximum value is 45.42mGy, and the average value is 10.08mGy with the 1st quartile value being 6.03mGy, the median being 9.09mGy and the 3rd quartile value being 12.65mGy. Conclusion : The diagnostic reference level for patient radiation dose to be recommended to the medical institutes in Korea is 3.42mGy for the posteroanterior view of pelvis radiography, 4.08mGy for the posteroanterior view of lumbar spine radiography, and 12.65mGy for the lateral view of lumbar spine radiography. Such values are all lower than the values recommended by 6 international organizations including World Health Organization, where the recommended values are 10mGy for the posteroanterior view of pelvis radiography, 10mGy for the posteroanterior view of lumbar spine radiography and 30mGy for the lateral view of lumbar spine radiography.

e-Learning 학습 성과에 영향을 미치는 요인 분석

이문봉(Moon-Bong Lee),강병영(Byung-Young Kang) 한국산업정보학회 2007 한국산업정보학회논문지 Vol.12 No.5