유체가 흐르는 원통형 관내의 최적 전기도금을 위한 전류분포의 예측

朱宰伯,鄭在益 弘益大學校 科學技術硏究所 1996 科學技術硏究論文集 Vol.7 No.1

The methmatical model of the tertiary current distribution for the optimum conditions of electroplating inside a cylindrical tube with fluid flows, was stuied. With the assumption of fully developed flow, in the diffusion layer region the steady state equation of laminar convective diffusion was used, in the bulk region the Laplace's equation in cylindrical coordinates was used. The optimum condition of electroplating considered parameters that decide current distribution, was predicted.

광고의 애매 모호성이 지각된 해석난이도 및 광고태도에 미치는 영향 : 사고방식의 조절효과

정재익,윤규도,김귀곤 한국디지털정책학회 2015 디지털융복합연구 Vol.13 No.6

사회적책임경영시스템(SRMS)

정재익 한국산업경영시스템학회 2017 한국산업경영시스템학회 학술대회 Vol.2017 No.춘계

토끼 대뇌 연막혈관에 국소 Nilvadipine 용액이 미치는 영향

정재익,이영우 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.8

The effects of mock CSF, nilvadipine solution of various concentrations and PEG 400 solution on regional cerebral pial vessels in rabbits were studied by topical microapplication to the perivascular evironment through the bilateral cranial windows in a randomized fashion. Physiological parameters(PaO₂. PaCO₂. blood pH. and systolic blood pressure) were not significantly changed during all experiments. The pial vascular diameter was directly determined with the micrometer eyepiece under the operating microscope The results were the followings : 1) Topical applications with mock cerebrospinal fluid(Group I ) and PEG 400(Group 1) on cerebral pial vessels did not significantly change pial vascular diameter in comparison with the resting state(p>0.05) 2) Application of nilvadipine solution of 1×10^(-8)M did not show significant dilatation, and solutions over the range of 1×10^(-7)M to 1×10^(-2)M resulted in significant dilatation of the cerebral pial arteries in a dose-dependent manner. The small arterial segments showed more dilatation than large arterial segments when topical nilvadipine solution were applied. however. the difference was not significant(p>0.05). 3) In venous segments, topical application of the nilvadipine solution induced no significant pial vein dilatation compared with the resting state(p>0.05). except when 10 minutes after the topical application of 1×10^(-2)M nilvadipine solution(p<0.05). It may be suggested that topical application of nilvadipine solution induce the dilatation of pial arteries with dose-dependent manner. Nilvadipine might be used for treatment and prevention of cerebral vasospasm and ischemia.

사회적책임경영시스템(SRMS) - A사 구축사례를 중심으로

정재익 한국산업경영시스템학회 2017 한국산업경영시스템학회 학술대회 Vol.2017 No.춘계초록

외국인직접투자기업 지정이 이익조정에 미치는 영향

정재익,박종국,홍영은,김수진 연세대학교 경영연구소 2019 연세경영연구 Vol.56 No.3

The opening of foreign investment has continuously increased the proportion of foreign investors in the corporate ownership structure, which has led to a considerable portion of the role of foreign investors in the Korean economy. In particular, it qualifies requirements, the government will designate it as a foreign direct investment enterprise and provide various benefits such as tax support, location support and cash support. It is argued that these benefits for foreign direct investment enterprises may not be desirable to discriminate based on the nationality of the capital. Therefore, in order for the discriminatory support policy for foreign direct investors to be valid, it should be evaluated that the companies that are supported are more likely to contribute to the national economy than the domestic ones because of their superior performance or external effects. As the investment intentions of foreign investors have a problem of pure function and agent problem, previous studies so far have presented contradictory conclusions. However, unlike a simple foreign investor, in order to be designated as a foreign-invested company, foreign investors are obliged to dispatch officers or provide technology to the foreign-invested enterprise that owns or invests in voting rights or the total number of shares, And joint research and development. The requirement to designate foreign direct investment is likely to make foreign investors have an investment objective based on long-term investment potential, rather than aiming at short-term dividend income or market profit. Therefore, in this study, it is expected that the earnings management will be reduced when the foreign direct investment enterprise is designated as a foreign direct investment enterprise. In order to verify this, we analyzed the earnings management behavior before and after the appointment of a foreign direct investment enterprise. As a result of the empirical analysis on the relationship between the conversion of foreign direct investment (FDI) and earnings management(DA) to the samples of KOSPI listed companies and KOSDAQ listed companies, the companies listed on the KOSPI market converted into foreign direct investment companies However, in the case of KOSDAQ listed companies, after converting to FDI, the level of earnings management did not differ from the level of earnings management before conversion. These results suggest that various support policies for foreign direct investment companies are effective in the KOSPI market. This study is expected to verify the effectiveness of the current foreign investment policy implemented by the government so that the government can be used as a major resource for improving the foreign investment policy in the future. 외국인투자의 개방은 기업소유구조에 있어 외국인투자자의 비중을 지속적으로 높여왔으며, 이로 인해 한국경제에 있어 외국인투자자의 역할은 무시할 수 없는 상당한 비중을차지하기에 이르렀다. 특히 일정요건을 충족한 경우 정부는 외국인직접투자기업으로지정하여 조세지원, 입지지원, 현금지원 등의 다양한 혜택을 제공하고 있다. 외국인직접투자기업에 대한 이러한 혜택은 자본의 국적에 따라 차별하는 것이 바람직하지 않을 수 있다는논란이 제기될 정도이다. 그렇다면 이러한 외국인직접투자기업에 대한 차별적인 지원 정책이타당성을 확보하기 위해서는 지원 받는 기업들이 국내 기업에 비해 성과가 우수하고, 외부적미치는 파급 효과가 커서 국가경제에 기여하는 바가 높다고 평가되어져야 한다. 외국인투자자의 투자의도에는 순기능적의도와 대리인문제적 의도가 상존하고 있기 때문에지금까지의 선행연구에서도 서로 상반된 결론을 제시하고 있다. 그러나 단순한 외국인투자자와는 달리 외국인직접투자기업으로 지정되기 위해서는 외국인투자자가 기업이 발행한의결권 또는 주식총수나 출자총액의 100분의10이상 소유하거나 투자한 당해외국인투자기업에 임원파견 또는 기술의 제공 공동연구개발 등의 요건을 충족하여야 한다. 이러한 외국인직접투자기업지정 요건은 외국인투자자로 하여금 단기적인 배당소득이나 시세차익을노릴 목적보다는 장기적인 투자 잠재력에 기초한 투자목적을 가지게 할 가능성이 높다. 이에 본 연구에서는 외국인직접투자기업으로 지정되면 지정 이전에 비해 이익조정이 줄어들것으로 예상하였다. 이를 검증하기 위해 외국인직접투자기업 지정전후의 이익조정행태를분석하였다. 외국인직접투자기업으로의 전환(FD)과 이익조정(DA)간의 관계를 코스피상장기업 표본과 코스닥 상장기업 표본으로 각각 구분하여 실증 분석한 결과 코스피시장에상장된 기업은 외국인직접투자기업으로 전환 후 이익조정이 감소하였으나 코스닥 상장기업의 경우 외국인직접투자기업으로 전환 후 이익조정수준이 전환 전 이익조정수준과차이가 없는 결과를 보였다. 이러한 결과는 외국인직접투자기업에 대한 각종 지원정책이코스피시장에서는 효과가 있는 것으로 해석할 수 있다. 본 연구가 현재 정부가 시행하고있는 외국인투자정책에 대한 실효성을 검증함으로써 향후 정부가 외국인투자정책을 개선발전시키는데 주요한 자료원으로 활용될 수 있을 것으로 기대한다.

가족 구성원에서 이환된 서경 (Writer

정재익,최성호,차재관,김상호,김재우 대한신경과학회 1999 대한신경과학회지 Vol.17 No.3

시멘트 소성공정 자동제어시스템 개발

정재익,이호형,유재상,김광호 한국시멘트협회 1997 시멘트 심포지움 Vol.25 No.-

곡선형 강박스거더 도로교의 단면최적화에 관한 연구

김상효,조성범,정재익 연세대학교 산업기술연구소 1996 논문집 Vol.28 No.1

The steel-box girder decks are widely adopted for middle and long-span bridges due to many advantages, when comparing with other open-section girder types, such as higher torsional rigidity, better resistance against corrosion, etc. In current design practice, the design variables of steel-box girder are selected mainly on the basis of engineer's experience and direct observation. Then the assumed sections are checked for design limit states. Therefore, the resulted design sections are doubtful in the optimum viewpoint. To achieve more rational design, systematic design procedure is required, by which the design constraints on steel-box girders are satisfied and the design variables of minimum cost are obtained. Generally both bending moments by transverse loads and torsional moments by eccentric loadings are the most important load effects in curved steel-box girder bridges. Therefore, an optimization program is developed to consider the torsional moment in addition to other load effects. The efficiency of the developed program has been verified by redesigning some sections selected from existing bridge designs. The resulting optimum sections with discrete variables are found to be cost-saving and comparable with original sections. Based on the parametric studies performed for mainly radius of curvature on curved bridge and bridge width, some essential guidelines for rational design of curved steel-box girder bridges are suggested.

증류공정 차수감소 모델의 개발과 Extended Kalman Filter에 의한 실시간대에서의 조정 ( Development of a Reduced-Order Distillation Model and Real-Time Tuning Using the Extended Kalman Filter )

정재익,최상열,이광순 대한전자공학회 1988 대한전자공학회 학술대회 Vol.1988 No.01