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배추좀나방(Plutella Xylostella Linnaeus)에 대한 새로운 살충활성 분자의 설계
조윤기,최우영,성낙도 충남대학교 농업과학연구소 2007 농업과학연구 Vol.34 No.2
The new insecticidal active molecules from the based on the holographic quantitative structure-activity relationships (HQSAR) between a series of 1-(R₁)-2-(n-octyl)-3-(R₂), 3-(R₃)-pseudothiourea derivatives and their insecticidal activities against Diamond-back moth (Plutella Xylostella Linnaeus) were designed and discussed quantitatively. The most active molecule from the based graphical analyses of atomic contribution maps with the optimized HQSAR C-1 model (q²=0.764 & r²_(ncv)=0.942) was 1-(n-butyl)-2-(t-butyl)-3,3-diisopropylpseudothiourea (P1: pI_(50)=5.30, IC_(50)=1.397 ppm). Therefore, it is suggested that the new designed molecule would increased the activity as much as 23.5 times as compared to X=n-octyl substituent 17(pI_(50)=4.00, IC_(50)=32.86 ppm) which was the highest active molecule in training set compounds.
조윤기 광운대학교 디지털경영연구소 2003 디지털 경영연구 Vol.9 No.-
한국에서의 군수품 품질보증은 미 국방성에서 품질에 영향을 주는 모든 요소들을 체계화, 절차화하고 계약업체에 생산시 이를 준수하도록 요구하기위해 1959년 제정한 MIL-Q-9858, MIL-I-45208, MIL-STD-45662를 근간」로 하여 국방-0050-0015, 국방-0050-0029, 국방-0050-0030을 제정하여 1970년대 중반부터 적용하여 왔다. 이후 국제적인 발전 추세에 맞추어 ISO 품질시스템 규격을 모체로 하여 군수품의 특수성을 고려한 국방규격 (국방0050-9001, 9002, 9003, 9004)을 새로이 제정하여 군수품 생산 및 품질보증에 적용하고, 국방규격에서 명시된 평가 기준 요구조건에 적합한 업체에 대하여 문서로서 공인하는 국방품질시스템 인증제도를 시행하고 있다. 본 논문에서는 생산자와 구매자의 신뢰의 기반하에 군수업체를 대상으로 시행하고 있는 국방분야의 품질시스템 인증 제도가 더욱 완벽하고 권위있는 제도로 발전하기 위한 발전방향을 제시하는데 본 연구의 목적이 있다. MIL-Q-9858, MIL-I-45208 and MIL-STD-45662 of the U.S. Pentagon established in 1959 to systemize in procedures for contracted companies to comply had formed the keynote of Defense-0050-0015, Defense-0050-0029 and Defense-0050-0030, effective since the mid 1970's, which became the ways to guarantee the qualities of military supplies in the Republic of Korea. After these standardizations, the Republic of Korea has newly established defense standards(Defense 0050-9001, 9002, 9003 and 9004) based on ISO in order to apply in guarantee procedures for military supplies produced as well as to keep up with the international trends. Not only these systematic procedures in producing military supplies, the Republic of Korea also has been operating the Defense Quality Authentication System to officially certify companies that are qualified for demands in the Defense Standards. In order to promote more development and authority in recently operated Defense Quality Authentications System on trust between supply and demand, I would like to offer other options to consider.
조윤기 대진대학교 1999 大眞論叢 Vol.7 No.-
The purpose of this paper is to analyze adjustment speeds of employment and working time in Korean manufacturing sectors by short-run labor demand function. The model used in this paper is based on the labor hoarding theory and the Koyck-type adjustment mechanism. Using monthly data, Ⅰ estimate the amount of labor hoarding in manufacturing sector and analyze the adjustment of it against the economic fluctuation. This method is expected to catch firm's labor adjustment behavior more accurately than that of simply regressing the employment and working time variables against the product fluctuation. Majou findings of this study are as follows. 1) labor hoaddings are found to be existing in manufacturing sector and adequately adjusted every month. 2) The rate of adjustment of surplus labor in previous month to desirable level is very small and non-production worker's adjustment speeds are more slow than that of production worker. it suggest that costs of employment adjustment are very severe. 3) working time adjustment to desirable level is found to be completed more quickly than that of employment. So, it can be concluded that employment adjustment are very rigid, but working time is quickly adjusted to desirable level.
기혼여성의 노동공급유형 및 결정요인 분석 : 이변량프로빗 모형을 중심으로 with bivariate probit selectivity model
조윤기 대진대학교 1996 大眞論叢 Vol.4 No.-
This study deals with employment pattern of married woman and it's determinant by treating the simultaneous labor force participation and employment pattern choice for married woman. It estimates a bivariate probit selectivity model with data from 1994 Korean Household Panel Study(KHPS) of Dae Woo Economic Institute. Estimated correlation coefficients between the error terms of labor force participation and job pattern choice equations is not zero and statistically significant. This implies that without sample selecion bias control, there may be a case for a serious bias. The empirical results generally conform the economic model's theoretical predictions. However, labor supply behavior of married woman in korea is less related with her human capital and market wage that she can earn than household characteristics such as husband's income, employment status and presence of young children.
모잘록병균(Pythium ultimum)에 대한 N-Phenylbenzenesulfonamide 유도체의 살균활성에 미치는 구조적 특성
조윤기,장기운,성낙도 충남대학교 농업과학연구소 2008 농업과학연구 Vol.35 No.1
The structural characteristics that influence on the fungicidal activities of N-phenylbenzenesulfonamide (1∼24) and N-phenyltheinylsulfonamide (25∼30) derivatives against Dampping-off (Pythium ultimum) were discussed quantitatively using the models of molecular holographic quantitative structure-activity relationships (HQSAR). From the based on these findings, the statistical results of the optimized HQSAR F-3 model showed better predictablity (r² cv. or q²=0.581) and correlation coefficient (r²_(ncv).=0.963). And, from the analytical results of the atomic contribution maps on the fungicidal activities, the most active compound is R₁= 2-fluoro-4-chloro substituent (4) and the most inactive one is R₁=4-methoxy substituent (20). It was found that the 2-fluoro-4-chlorophenyl group as a R₁-group was an important structure and a characteristic factor not only for herbicidal activity but also for fungicidal activity.
한국 노동시장의 수량적 유연성 분석 : 국제비교를 중심으로
조윤기 대진대학교 1998 大眞論叢 Vol.6 No.-
This study is intended to measure the extent of labor flexibility in Korean labor market. For these end, I estimate the speed of labor input adjustment in Korean manufacturing sector. Using quarterly data, I estimate median lag and mean lag of labor adjustment through Koyck model in Korean manufacturing sector and compare it with those of U.S and European Countries. Major findings of this study are as follows 1) Employment adjustment speed in Korea is substantially slower than those of U.S, Germany and Belgium. So, unlikely previous studies which have analyzed Korean labor market flexibilities, it can be concluded that employment adjustments in korea are very difficult. 2) Working time adjustment are also more difficult than those of above mentioned countries. Thus adjustments of total employment which include number of workers and workers time are analized to be relatively difficult compared to those of OECD countries.
조윤기 건국대학교 1993 대학원 학술논문집 Vol.36 No.-
Wage structure in a country is a very important issue in respects that it reallocates labor forces through labor movement and determines the income distribution of wage earners. This paper is intended to analyze the wage structure in Korean labor market. The estimated wage differentials by industry and firm size are very small in comparison with those by education levels and occupations, and negligible. The analysis shows that nonproduction workers earn 35% more than production workers, and university graduates 32% more than high school graduates. So, wage differentials in Korean labor market can be defined to those by occupations and education levels. Also, occupations are largely composed according to education levels. Thus, education level is the most important factor that has an effects on wage structure in Korean labor market. The causes of these wage differentials can be found as follows. 1.difference in complementarity between university and high school graduates. 2.difference in developments of internal labor markets among occupations. 3.screening effect of education.
발달장애학생의 제조업 현장실습에 요구되는 기초 직업기술 중요도에 대한 특수교사와 산업체 직원의 인식 비교
조윤기,이미숙,양소현 부산대학교 지역혁신역량교육연구센터 2022 교육공동체연구와실천 Vol.4 No.1
연구목적: 본 연구는 발달장애학생의 제조업체 현장실습에 필요한 기초 직업기술 중요도에 대한 특수교사와 산업체 직원의 인식 차이를 살펴보고자 하였다. 연구방법: D와 CH 지역의 특수학교 교사와 산업체 직원을 대상으로 설문조사를 실시하였고, SPSS 24.0 프로그램을 활용하여 기술통계 및 t-test를 실시했다. 연구결과: 첫째, ‘기초 직업기능’에서 특수학교 교사와 산업체 직원은 ‘안전수칙을 알고 안전수칙 지키기’를 중요하게 인식하였다. 둘째, ‘직무수행기능’에서 특수교사는 ‘직무 순서에 따라 올바르게 수행하기’를, 산업체 직원은 ‘불량품 없이 작업을 정확하게 수행하기’를 중요하게 인식하였다. 셋째, ‘사회성 및 일상생활 기능’은 특수교사와 산업체 직원 모두 ‘직장의 정해진 규율 지키기’를 가장 중요하게 인식하였다. 결론: 마지막으로, ‘직무수행기능’과 ‘사회성 및 일상생활 기능’에서는 특수교사가 산업체 직원에 비해 보다 중요하게 인식하고 있는 것으로 나타났다. 논의: 산업체 직원이 중요하게 인식하고 있는 기초 직업기술들을 발달장애학생의 직업 관련 교육과정에 반영함으로써, 산업체 맞춤형의 직무지도가 이루어질 필요가 있다.