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2×2 생물학적 동등성 시험 적정 피험자 수의 간단한 계산 방법
이영주,이홍재,김한결,오주희,신용준,김영지,김상년,Lee, Young-Joo,Yi, Hong-Jae,Kim, Han-Gyul,Oh, Ju-Hee,Shin, Yong-Jun,Kim, Young-Gi,Kim, Sang-Nyun 한국약제학회 2009 Journal of Pharmaceutical Investigation Vol.39 No.3
There are several approaches to calculate a sample size for bioequivalence test. Among these approaches, sample sizes determination based on Schuirmann's two one-sided tests procedures has been used most popularly in case of 2${\times}$2 bioequivalence study. Here we proposed simple sample size table for conventional 2${\times}$2 bioequivalence test based on Schuirmann's two one-sided tests in accordance with Korean Guidelines for Bioequivalence Test. This table will allow researchers with a little statistical background to calculate the sample size for bioequivalence with easy process.
과학고등학교 학부모와 학생의 학교만족도 및 학교 선택 요인에 관한 연구
이영주(Young Ju Lee),최진수(Jinsu Choi),이범진(Bumjin Yi),이규성(Kyusung Lee) 한국영재학회 2020 영재교육연구 Vol.30 No.4
본 연구는 특수목적고등학교이자 별도의 학생 선발 과정을 가지는 과학고 학생 및 학부모를 대상으로 고등학교 학교 선택요인을 살펴보고 학교에 대한 만족도를 살펴보고자 하였다. 이를 위해 과학고에 재학 중인 학생과 학부모를 대상으로 설문조사를 실시한 후 대응되는 총 59쌍의 설문결과를 분석하였다. 그 결과, 학부모가 학생들보다 진학 준비 활동에 더 많이 참여하고 있었으며, 진학에는 부모와 자녀의 의견이나 중학교 교사의 상담, 고등학교 직접 방문이 도움이 되는 것으로 나타났다. 둘째, 학부모는 학생보다 학교선택 시 학생선발방법, 연구 활동, 우수교육 프로그램, 학교위치, 학교의 역사와 명성, 장학금 및 경제적 지원을 더 중요하게 고려하는 것으로 나타났다. 셋째, 과학고에 대한 학교 만족도는 학생과 학부모 모두 높은 것으로 나타났으며, 특히 학생은 학부모에 비해 수업에 대한 만족도가 더 높은 것으로 나타났다. 본 연구 결과를 바탕으로 과학고의 운영방안 개선을 위한 시사점을 제공해 줄 것으로 기대한다. The purpose of this study was to analyze the opinions of parents and students regarding science high school selections and school satisfaction. For this study, 104 students and 63 parents from 20 science high schools participated. The results showed that both parents and students collected information from diverse sources for school choice, but the opinion of parents and children, counseling with middle school teacher and high school visits were helpful when it came to school choice. Secondly, there are multiple factors to consider when choosing a school including the identification process, research activity, special educational program, location, history, reputation, and scholarship and economic fund between parents and students.. Ultimately, students showed higher satisfaction of class than parents. The results of this study were expected to be used as basic data to encourage future improvement in science high schools.
이영주(Young-Ju Lee),윤한기(Han-ki Yoon),박이현(Yi-Hyun Park),박준수(Jun-Soo Park),A. Kohyama 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
Nano Infiltration Transient Eutectic Phase - Silicon Carbide (NITE-SiC) have been fabricatied by a Hot Pressing (HP) process, using SiC powder with an average size of about 30㎚. Alumina (Al₂O₃) and Yttria (Y₂O₃) were used for additives meterials. These mixed powders were sintered at the temperature a of 1300℃, 1650℃, 1800℃ and 1900℃ under an applied pressure of 20㎫. Densification of microstructure gives an effect to density and strength. Specially, Densification Mechanism basically is important from the sintering which use the HP. In this study, nano size particle was used to HP and the densification of NITE-SiC mechanism by a press displacement appers investigated. The slope changes places by a press displacement shared a at three steps. The mechanism on the densification of each sintering temperature was investigated. The each step is shows a with each other different mechanism quality.
고온용 SiC<SUB>f</SUB>/SiC 복합재료개발 기술과 활용방향
윤한기(Han Ki Yoon),이영주(Young Ju Lee),박이현(Yi Hyun Park) 대한기계학회 2008 大韓機械學會論文集A Vol.32 No.11
The development of the first wall whose major function is to withstand high neutron and heat fluxes is a critical path to fusion power. The materials database and the fabrication technology are being developed for design, construction and safety operation of the fusion reactor. The first wall was designed to consist of the plasma facing armor, the heat sink layer and the supporting plates. and Porous materials are of significant interest due to their wide applications in catalysis, separation, lightweight structural materials. In this study, the characteristics of the sintering process of SiC ceramic, SiCf/SiC composite and porous Cf/SiC composite have been introduced order to study of the fusion blanket materials and heat-exchange pannel.