가래나무로부터 세포독성물질의 분리 , 구조결정 [ 대한약학회 춘계총회 및 학술대회 ] ( PRESENTATIONS )

조윤기 충북대학교 약품자원개발연구소 1994 약학논문집 Vol.9 No.-

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.

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.

신뢰성 향상을 위한 품질시스템 인증 발전방향에 관한 연구 : 방위산업체 인증체계를 중심으로 Concerning Authentication System in Defense Industries

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.

노동력 퇴장과 경기변동

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.

북한의 대외 무역구조변화와 경제발전단계분석

조윤기,조영기 대진대학교 2000 大眞論叢 Vol.8 No.-

This study is intended to find the properties and development level of North Korean economy by analizing the trade performance of North Korea. For this purpose, We start with the assumption that trade patterns inevitably reflect the internal characters of economy. The empirical results of index of trade specialization of composite goods in North Korea are as follows. 1) During 1970-80, North korea had a comparative advantages in natural resource intensive Ricardo goods. But this comparative advantage had declined in 1980s. So, North Korea seems to have passed the first stage of economic development. 2) Comparative advantages in Hecksher-Ohlin goods are more than one during the whole periods. So, North Korea has a standard technologies to product a industrial goods. Given that exports of these products are concentrated in socilaist countries and those to capitalist countries are far less than imports, however, North Korea seems to have gained comparative advantage over socialist countries alone. 3) Comparative advantages in product cycle good with the advanced technology are less than one during the whole periods. Therefore, North Korea's economic cooperation with multinationals and the level of technical development is far below the world average. But they are increasing continuously since 1980s. Therefore, It can be said that North Korea have passed the first stage of development, have a comparative advantages in standard industrial goods produced with modern, if naive, technologies and have pursued the improvement of the comparative disadvantage in high tech industries since 1980s.

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.

보너스제도와 노동의 유연화

조윤기 대진대학교 1997 大眞論叢 Vol.5 No.-

This paper is intended to investigate the possibility of Korean bonus system to contribute to labor flexibilities. To this end, this paper examines 1) the nature of bonus payments as worker's share of firm specific human capital investment profits and 2) the cyclical movement of bonuses compared with regular wages and the relation of bonuses to employment in the context of Weitzman's share Economy. The results of this study are as follows 1) Korean bonuses are not paid according to general or firm specific human capital such as educational level and tenure in current firm. So It is hard to say that Korean bonus system lead the worker's longevity or have a function of compensating individual worker's effort. 2) Korean bonus is more procyclical than regular wages in that bonuses-wage ratio is positively correlated with economic conditions. But not only bonuses but also regular wage move procyclically with economic conditions, so that elasticities of bonus-wage ratio are much less than their counterpart in japan. Hence, It can be said that Korean labor market is more or less a "spot market" and more flexible in wage and numerical aspects than Japanese market.

한국노동시장의 임금구조분석

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.

노동조합이 근로시간 및 초과근로수당에 미치는 효과분석

조윤기,배규한 한국동서경제학회 2001 한국동서경제연구 Vol.12 No.2