Vibration Analysis of Hybrid Composite Tilting Pad Journal Bearing

Yii Kwang Yiew,Seung Yoon On,Seock-Sam Kim 한국트라이볼로지학회 2017 한국트라이볼로지학회 학술대회 Vol.2017 No.10

Peer mentoring among doctoral students of science and engineering in Taiwan

Yii-nii Lin,Angela Yi-ping Hsu 서울대학교 교육연구소 2012 Asia Pacific Education Review Vol.13 No.4

This study describes the peer mentoring experience from doctoral student mentors' point of view. Twelve science and engineering doctoral students participated in this phenomenology study. The findings suggest doctoral peer mentors served instrumental, psychosocial, buffering, and liaison roles; they passed on their social, professional, and academic knowledge to their mentees and tried to assist them in adapting to the culture of the lab and academia. The study identified a variety of factors that influenced their attitudes and behaviors as peer mentors and concluded this system would be beneficial to the learning and development of both individual students and lab teams. The aims of this study were threefold: first, to identify the importance and necessity of peer mentoring systems as part of the experience of working in labs in graduate school; second, to ascertain which interactions and factors in the peer mentoring relationship benefitted both peer mentors and peer mentees; and third, to explore what might constitute best practices in the peer mentoring relationship.

지속가능경영을 위한 역물류 세부요인에 대한 연구 (다국적 정보통신 기업을 중심으로)

이근호 ( Kunho Yii ),김현수 ( Hyunsoo Kim ) 한국로지스틱스학회 2016 로지스틱스연구 Vol.24 No.2

국제적인 환경규제 강화에 따라 기업들은 지속가능경영을 도입하고 있다. 본 연구는 2010년부터 최근 5년간 다국적 정보통신 기업에서 발간하는 GRI 지속가능보고서(버전 G3.1 규약)를 구성하는 총 83개 요인 중 선행연구에서 제시된 21개 역물류 관련 세부요인에 대해 지속가능경영지수(SMI)를 산출하여 지속가능경영의 도입을 고려하는 기업에게 필요한 실무적 가이드라인을 제시하였다. 연구결과 대상 기업들의 역물류 종합 SMI는 시간이 경과함에 따라 전반적으로 개선되고 있음이 파악되었다. 그러나, 선도그룹과 후발그룹 기업간의 세부요인별 역물류 SMI 수준은 분명한 차이가 존재함이 확인되었으며, 선도그룹은 주로 초반부터 급격하게 역물류 SMI가 개선된 반면에 후발그룹은 조금 늦게 역물류 활동을 통한 지속가능경영이 개선되고 있음이 파악되었다. 또한 활발한 역물류 활동을 추진하는 선도그룹 기업은 재무성과에서도 우수한 결과를 나타내고 있음도 확인하였다. This study works on the practical guideline necessary for companies considering the introduction of ‘Sustainable Management’by calculating for the Sustainable Management Index (SMI) over 21 specific factors regarding Reverse Logistics. Research over a total of 83 factors composing GRI Sustainability Report (version G3.1 regulation) issued by a multi-national ICT (information & communication technologies) companies has been on-going since 2010. As the results, it was found out that comprehensive SMIs of targeting companies have been generally improving over time. However, it has been confirmed that a distinctive difference in SMI levels depending on specific factors between leading group and following group was ever-present. Also, while SMIs of leading group abruptly improved mainly in early stages, SMIs of following group showed improvement over a latent period. Although those leading group companies promoting active Reverse Logistics activities also performed well financially.

다국적 정보통신기술(ICT) 기업의 지속가능경영을 위한 역물류 활동요인에 관한 연구

이근호 ( Kun Ho Yii ),김현수 ( Hyun Soo Kim ) 한국로지스틱스학회 2015 로지스틱스연구 Vol.23 No.3

본 연구에서는 ICT(Information and Communication Technologies) 기업의 지속가능경영을 위한 역물류(Reverse Logistics) 활동의 주요 요인을 지속가능보고서(GRI: Global Reporting Initiative)의 3대 성과지표인 Economic, Environmental, Social으로 선정하여, 계층화 의사결정법(AHP: Analytic Hierarchy Process)을 이용하여 1차 계층 및 2차 계층 요인들에 대한 중요도를 분석하였다. 그 결과 1차 계층요인 중에서는 경제적 성과지표(0.617), 사회적 성과지표(0.200) 그리고 환경적 성과지표(0.183) 순으로 중요도가 분석되었다. 1차 계층요인의 중요도와 2차 계층요인의 지속가능경영에 영향을 미치는 중요도를 동시에 고려한 총 11개의 역물류 활동 관련 요인들 중 직접적인 경제적 가치의 창출과 배분(0.350) 요인, 정부지원 보조금 혜택(0.147), 기후변화의 재무적 영향과 위험과 기회(0.120) 요인 등 모두 경제적 성과지표에 해당하는 요인들로 파악되었다. 본 연구의 결과는 관련 산업의 기업들이 지속가능경영을 위한 역물류 활동을 추진하고자 할 때 우선적으로 도입을 검토해야 할 실무적 지침을 제공하고 있다. This study analyzes activity factors associated with reverse logistics for sustainable management in the field of information and communication technologies (ICT). Three performance indicators.economic, environmental, and social.were selected and analyzed as major factors in reverse logistics, as proposed by the Global Reporting Initiative. We determined the relative importance of the first and second hierarchy factors using the analytic hierarchy process. The outcome of this relative importance analysis from the first hierarchy was determined to be 0.617, 0.200, and 0.183 for the economic, social, and environmental factors respectively. From this simultaneous analysis of the two hierarchy factors, three specific factors were identified as the most important: (1) the direct economic value generated and distributed (0.350), (2) the financial assistance from the government (0.147), and (3) the financial implications and other risks and opportunities for the organization’s activities due to climate change (0.147). The results provide a practical guide for the factors to be prioritized by ICT enterprises for sustainable management in reverse logistics.

Comparison of Dry Deposition Predicted from Models and Measured with a Water Surface Sampler

HOLSEN,THOMAS E.,YIi,SEUNG-MUK,NOLL,KENNETH E. 이화여자대학교 환경문제연구소 1997 이화환경연구 Vol.1 No.-

An Unusual Bioconjugate of Glycerol and Poly(γ-Glutamic Acid) Produced by Bacillus subtilis C1

( Ing Lung Shih ),( Jane Yii Wu ),( Pei Jen Wu ),( Ming Hau Shen ) 한국미생물생명공학회 2005 Journal of microbiology and biotechnology Vol.15 No.5

Production of antifungal lipopeptide from Bacillus subtilis in submerged fermentation using shake flask and fermentor

Ing-Lung Shih,Chih-Yang Lin,Jane-Yii Wu,Chienyan Hsieh 한국화학공학회 2009 Korean Journal of Chemical Engineering Vol.26 No.6

Optimization of the production of antifungal lipopeptide, iturin A, by B. subtilis was carried out in submerged cultural fermentation. In a shake-flask experiment, response surface methodology (RSM) was employed to optimize the cultivation conditions of Bacillus subtilis S3 for the enhancement of iturin A production. The optimal conditions for iturin A production obtained from RSM were pH 6.0, 0.93% maltodextrin, 1.11% glucose, 0.72% corn steep powder (C.S.P), 1.5 mM MgSO4, 0.75 mM KH2PO4, rotation speed 180 rpm and area of aeration 4.35 cm2. 57% increase of iturin A productivity (from 47.19 mg/L to 74.22 mg/L) was observed using the one-factor-at -a-time technique; however, 180% increase of iturin A productivity (from 47.19 mg/L to 132.23 mg/L) was observed with RSM. The iturin A production was further studied in a 5-L fermentor with a variation of agitation speed, aeration and baffles. In the 5-L fermentor, it was found that increased agitation speed improved the growth of B. subtilis and the production of iturin A. Aeration at 2 vvm gave excellent production of iturin A (175.52 mg/L) at 6 d of fermentation. The addition of baffles in the fermentor has significantly influenced the oxygen mass transfer coefficient (KLa) and iturin A production.

스포츠심리학 : 한국인의 운동 참가 행동에 관한 유교문화권 행동 의도 모형의 실증적 타당성

김정수(KimJung-Soo),구자일(KooJa-YII) 한국체육학회 2000 한국체육학회지 Vol.39 No.2

이 연구는 서구의 태도-의도 관계 모형을 소비 행동에 기초하여 집단주의 문화에 적합하도록 수정한 Lee(1990)의 유교문화권 행동 의도 모형이 한국인의 운동 참가 행동을 설명하는 데에 있어서 타당한지를 실증적으로 검증하는 데에 그 목적이 있다. 이를 위하여 본 연구에서는 우리 나라 C도 N시에서 거주하는 20세 이상의 남녀 347명을 체계적으로 임의표집하여 연구 대상자로 선정한 다음 운동에 대한 태도와 의도에 관한 질문지에 응답하도록 하였다. 검색 과정을 통하여 선정된 299개의 유효 자료를 이용하여 상관분석, 중다회귀분석 및 구조방정식을 이용한 잠재 변인 모델 검증을 실시하였다. 일련의 연구 과정을 통하여 이 연구에서는 다음과 같은 결론을 도출하였다.첫째, 한국인의 운동 참가 행동에 관한 유교문화권 행동 의도 모형은 한국인의 운동 참가를 설명하는 데에 있어서 타당성을 가진다.둘째, 체면 유지나 집단 동조 압력보다는 운동에 대한 태도가 운동 참가 의도에 상대적으로 큰 영향을 준다. The purpose of this study was to investigate the empirical validity of confusian behavior-intention model of exercise behavior which was developed to explain consumer behavior in Korea. Subjects(N = 347) were inhabitants of N city in C province who selected using systemic purposeful sampling. All subjects completed the attitude and intention for exercise questionnaire. Collected data were analyzed using correlation analysis, regression analysis, and structural equation modeling foe latent variables.The conclusions were as following:First, the confucian behavior-intention model of exercise behavior have empirical validity to explain exercise behavior in Korea.Second, the direct effect of attitude toward exercise on exercise intention and behavior is greater than face saving and group confirmity pressure.

Failure Modes of Large-scale Landslides Induced by 2009 Typhoon Morakot in Southern Taiwan

( Keng-hao Kang ),( Hao-hsun Lin ),( Yii-wen Pan ),( Jyh-jong Liao ) 대한지질공학회 2019 대한지질공학회 학술발표회논문집 Vol.2019 No.2

After the catastrophic landslide at the Shiaolin village during the 2009 Typhoon Morakot, many large-scale landslide areas were delineated using LiDAR DEM. Among those, 356 large-scale landslides caused by the Typhoon Morakot are in southern Taiwan. In addition to the delineation task, the assessment of landslide activity is also essential for risk management. This study aims to classify the failure modes of large scale landslides in order to provide information for further assessment. For remote sensing interpretation, this study adopted google satellite images, multi-period aerial photos, 5x5m/1x1m DEM, and geologic maps. Arc GIS was used to calculate the geomorphic index of the landslides before and after 2009 Typhoon Morakot. We used a variety of parameters including drainage system, shape of bare areas, and characteristics of topography to identify the failure modes of landslides. As a result, this study classify the large-scale landslides induced by the Typhoon Morakot into six categories: colluvium slide, dip slope slide, weathered bedrock slide, rock avalanche, shallow debris slide, and complex type. Among those cases, ten sites are possibly related with gravitational slope deformation.

The Research on the hearing damage and methods of hearing protection against aircraft noise

송병흠,최일규,Song, Byung-Heum,Choi, YiI-Kyoo 한국항공운항학회 1995 한국항공운항학회지 Vol.3 No.1

Nowadays aviation noise significantly affects a number of people over the world. This paper is mainly focused on the effect of temporary and permanent hearing loss of cockpit crew, flight attendants, passengers, persons in communities exposed to aircraft overflight. Also this paper describes the human hearing mechanism and the processes of temporary and permanent hearing loss. The results of research are presented and the potential for hearing loss in aviation noise environments evaluated. The Occupational Safety and Health Administration (OSHA) hearing protection criteria are also addressed.