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0.05wt% $SbI_3$를 첨가한 n형 $Bi_2({Te_{0.95}}{Se_{0.05}})_3$ 가압소결체의 열처리 시간에 따른 열전특성
이선경,오태성,현도빈,Lee, Sun-Kyong,Oh, Tae-Sung,Hyun, Dow-Bin 한국재료학회 2000 한국재료학회지 Vol.10 No.4
0.05wt% $SbI_3$를 첨가한 n형 $ Bi_2(Te(_{0.95}Se_{0.05})_3$ 합금분말을 용해/분쇄법으로 제조하여 가압소결 후, 36시간까지의 열처리 시간에 따른 열전특성의 변화 거동을 분석하였다. 열처리 시간이 증가함에 따라 0.05wt% $SbI_3$를 첨가한 n형 $ Bi_2(Te(_{0.95}Se_{0.05})_3$ 가압소결체의 전자 농도가 감소하였다. 0.05wt% $SbI_3$를 첨가한 $Bi_2(Te(_{0.95}Se_{0.05})_3$ 가압소결체는 $2.1{\times}10^{-3}/K$의 성능지수를 나타내었으며 $500^{\circ}C$에서 3시간 열처리 시 $2.35{\times}10^{-3}/K$로 성능지수가 향상되었으나, 12시간 이상 열처리 시에는 전기비저항의 증가에 기인하여 성능지수의 현저한 감소가 발생하였다. Thermoelectric properties of the 0.05wt% $SbI_3$-doped n-type $Bi_2(Te_{0.95}Se_{0.05})_3$ alloy, prepared by melting/grinding and hot pressing, were investigated with variation of the annealing time up to 36 hours. The electron concentration of the 0.05wt% SbI$_3$-doped n-type $Bi_2(Te_{0.95}Se_{0.05})_3$ alloy decreased with increasing the annealing time. The figure-of-merit of the 0.05wt% $SbI_3$-doped n-type $Bi_2(Te_{0.95}Se_{0.05})_3$ alloy was improved from $2.1{\times}10^{-3}/K$ to $2.35{\times}10^{-3}/K$ by annealing at $500^{\circ}C$ for 3 hours. When annealed longer than 12 hours, however, the figure-of-merit decreased substantially due to the increase of the electrical resistivity.
이선경,권순석,LEE, Sun-Kyoung,Kwon, Soon-Suk 대한치과기공학회 2019 대한치과기공학회지 Vol.41 No.4
Purpose: The purpose of this study was to enhance curriculum satisfaction of dental laboratory technology and curriculum demands. Methods: From March 5 to March 31, 2019, a self-written questionnaire was conducted for 195 students from the department of dental laboratory technology at a university in Gangwon-do. The analytical methods used were descriptive statistical analysis, frequency analysis, cross analysis, correlation analysis and reliability analysis. The collected data was used for SPSS 18.0 for Windows statistics program. Results: The demand of the school education includes systematic experiments and demand of practical training, acquisition of professional knowledge, introduction of advanced technology curriculum, reduction of national examination-oriented curriculum, and increased professionalism and professionalism as professional professionals. Investigated by the ethics. In addition, they were strongly aware of the necessity of digital education related to CAD / CAM, and there was a high demand for how to operate programs, scanning and design. Conclusion: The curriculum needs to be reorganized to cultivate dental technicians in a changing era, and in-depth centralized curriculum in fields with high practical needs, as well as vocational and ethical views as professionals.
이선경,성정민,Lee, Sun-Kyoung,Seong, Jeong-Min 한국전자통신학회 2013 한국전자통신학회 논문지 Vol.8 No.2
본 연구는 의료기관 종사자들의 이직의도 수준을 파악하고, 이직의도에 영향을 미치는 요인을 파악하고자 시행되었다. 연구대상은 179명의 의료기관 종사자를 대상으로 선정하였고, 설문지를 사용하여 자료를 수집하였다. 다중회귀분석결과, 연령과 교육수준, 경력관리와 조직몰입 요인에서 유의한 영향을 미쳤다. 결론적으로, 이직의도를 감소시키기 위해서는 의료기관의 다양한 경력관리 프로그램 개발과 의료기관 종사자들의 직무몰입도를 높이기 위한 대책이 필요하다. The purpose of this study is to find out factors that turnover intention among medical staffs of hospital. The study subjects were 179 medical staffs of hospital and the data were collected using by self-administered questionnaire. As the result of multiple regression analysis the age, education, career management and organizational commitment were statistically significant related with turnover intention. Especially, in order to reduce turnover intention that hospital is development of career management programs and organizational commitment for enhancing the security measures are necessary.
이선경,Lee, Sun-Kyoung 대한치과기공학회 2018 대한치과기공학회지 Vol.40 No.2
Purpose: The purpose of this study is to provide basic data that can help the development and implementation of effective and satisfactory programs. Methods: This study was used for the analysis of 699 dental technicians attending the general conference of Korean dental technicians in 2017. Statistical analysis, t-test and ANOVA were used for the analysis. The collected data were analyzed by SPSS 24.0. Results: Satisfaction with the number of lectures in continuing education was 2.54, and satisfaction with composition of major field was 2.72. Satisfaction with the content of the lecture was 3.04. The instructor level was 2.91, and the overall satisfaction was 2.92. Satisfaction with continuing education was 2.83. Conclusion : In order to increase the satisfaction of dental technicians, we expect to have various practical and systematic education such as diversification of education methods, quality level management, online continuing education.
수도권지역에서 노인의치 국민건강보험 급여에 관한 치과기공사의 인식조사
이선경,박용덕,황경숙,김영훈,Lee, Sun-Kyoung,Park, Yong-Duk,Hwang, Kyung-Sook,Kim, Yung-Hoon 대한치과기공학회 2010 대한치과기공학회지 Vol.32 No.1
Purpose: The purpose of this study is dental technicians perception investigation about national health insurance of old persons denture in metropolitan area. Methods: A survey was performed on 103 subjects in metropolitan from January 14 to April 30 in 2009. The research tool was a structured questionnaire. The collected data was analyzed by frequency, descriptive and multiple linear regression. Results: Total dental technician who respond to questionnaire was 103(100.0%). Male respondent appeared by 66.0%. 30-year-old low respondent appeared by 60.2% and subjects lived the most in seoul(68.0%). When got married, was expose that realization about national health insurance of old person s denture was high(p<0.05). When made denture, was expose that realization about national health insurance of old person s denture was high(p<0.05). Also, When got married, was expose that necessity about national health insurance of old persons denture was high(p<0.001). Conclusion: When did national health insurance of old persons denture, there were a lot of problems. But, old people was need it. Therefore, I desire that this study is used to basic data of the national health insurance.