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정보기술의 진화과정 측면에서 본 중개형 e-마켓플레이스의 발전방향
이재근,Lee, Jae-Keun 한국정보기술전략혁신학회 2003 情報學硏究 Vol.6 No.1
In recent years, the number of public e-Marketplaces have grown according to the leap-frogging advancement of network technology based on open communication architecture named Internet. However, the transaction volume through public e-Marketplaces have been an immaterial increase, and some well-known sites closed their businesses. This study proposes the public e-Marketplace as an e-Business system which has been recognized the most strategic application of business information technologies (Barrett & Konsynski, 1982; Cash & Konsynski, 1985), and suggests some future strategic and technological direction which supports a firm's transaction infrastructure under internet architecture. For this purpose, it reviews evolution of business information technologies.
뉴스초점 - 광유와 합성유의 에너지 소비량, 온도변화 등의 성능시험 비교 고찰
이재근,Lee, Jae Keun 한국기술사회 2012 技術士 Vol.45 No.6
Namhae chemical is one of the largest fertilizer manufacturing company in Korea which company has operating 4 unit agitator gear boxes and producing variety kinds of fertilizer production. The gearbox operating temperature of agitator is approximated in $55^{\circ}C{\sim}90^{\circ}C$ and required to keep operating continuous without stopping. The system required high performance oil and longer oil drain interval as limited workforce in maintenance team. It was lubricated by mineral gear oil of ISO VG 320 and also need to change to new oil frequently. Namhae Chemical would expect to keep stable operating condition without shut down and consider, lower cost of operation and equipment protection.
1,2,4-Triazine Ⅰ ; 6-Oxo-1,6-dihydro-1,2,4-triazine 유도체의 Tautomeric 평형에 관한 연구
이재근,박무덕,이동엽,김우식,Jae-Keun Lee,Moo-Duk Park,Dong-Yeob Lee,Woo-Sik Kim 대한화학회 1988 대한화학회지 Vol.32 No.4
잘 알려져 있지 않는 6-oxo-1,6-dihydro-1,2,4-triazine 유도체 합성을 시도하였다. 가능한 각 tautomer의 model화합물을 합성하고 이들의 UV Spectra를 물과 alcohol용매 상에서 비교하여 tautomeric 평형을 검토하였다. 기대했던 상당량의 6-hydroxy tautomer는 관찰되지 않고 대부분 6-oxo-tautomer로 용액상태에서 존재함을 알았다. Synthesis of 6-oxo-1,6-dihydro-1,2,4-triazine derivatives was tried. The model compounds of the possible tautomers were synthesized. The tautomeric equilibrium of 6-oxo-1,6, dihydro-1,2,4-triazine derivatives was determined by comparing their UV spectra and those of model compounds. 6-oxo-tautomer was exclusively detected in water and alcohol solutions without observation of the expected 6-hydroxy tautomers.
1,2,4-Triazine III : 1,2,4-Triazine 유도체의 Methiodide 염 합성과 이들 염의 고리 축소화반응에 의한 1,2,4-Triazole 유도체 합성
이재근,유향선,Jae Keun Lee,Ryu Hyang Sun,W. W. Paudler 대한화학회 1989 대한화학회지 Vol.33 No.4
1,2,4-Triazine 유도체들을 acetone 용매하에서 methyl iodide와 반응시켜 다양한 1-methyl-1,2,4-triazinium iodide 염을 합성하였다. 또한 이들 염을 10% NaOH 수용액 내에서 $K_3Fe(CN)_6$로 산화시킨 결과 고리 축소화반응이 일어나 1-methyl-1,2,4-triazole 유도체를 주로 얻을 수 있었으나 $C_6$에 치환기가 없을 경우는 미량이긴 하지만 1,6-dihydro-6-oxo-1,2,4-triazine 유도체도 동시에 얻을 수 있었다. 고리 축소화반응은 $OH^-$에 의해 먼저 pseudo base를 형성하고 이 Pseudo base가 1-methyl-1,2,4-triazole과 1,6-dihydro-6-oxo-1,2,4-triazine으로 진행됨을 확인할 수 있었고 또한 1,2,4-triazine의 3개의 질소원자 중 $N_1$ 원자에 quaternization됨을 확인할 수 있었다. Various 1-methyl-1,2,4-triazinium iodides were easily synthesized by the reaction of various 1,2,4-triazines and methyl iodide in acetone. When methyl iodide salts of 1,2,4-triazine derivatives were treated with $K_3Fd(CN)_6$ in 10% NaOH solution, 1-methyl-1,2,4-triazole derivatives as the main products were obtained by ring contraction. In addition to 1-methyl-1,2,4-triazole derivatives, 1,6-dihydro-6-oxo-1,2,4-triazine derivatives as the minor products were also obtained when there were no substitutents in $C_6$-position of 1,2,4-triazines. The formation of pseudo base by $OH^-$ and then oxidation to either 1,6-dihydro-6-oxo-1,2,4-triazines or 1-methyl-1,2,4-triazoles were suggested as the mechanism of the ring contraction. This mechanism also verified that the position of quaternization was neither $N_2$ nor $N_4$ but 1-nitrogen of 1,2,4-triazine.
NTIS 데이터를 활용한 국가연구개발사업의 미션구성체의 탐색적 적용에 관한 연구
이재근,Lee, Jae-Keun 기술경영경제학회 2014 Journal of Technology Innovation Vol.22 No.3
본 논문은 사후적인 정량적 성과를 바탕으로 재정사업을 관리하는 기존체계에서 벗어나 사업의 출발점으로서의 미션의 역할을 강조하고자 한다. 이를 위해 선행연구가 탐색적으로 제시한 국가연구개발사업의 미션구성체와 이를 활용한 사업포트폴리오모형을 구체화하여야 한다. 본 논문에서는 미션구성체를 측정가능성 측면에서 재구성하고, 사업포트폴리오모형에 대한 측정도구를 설계하였다. 더 나아가 현재 진행되고 있는 7개의 대표적인 국가연구개발사업을 선정하여 사례연구를 진행함으로써 모형의 경험적 타당성과 전략적 의미를 논의하였다. 사례연구는 사업들의 정태적 및 동태적 차원에서 사업간 그리고 사업 내의 연도별 변화 추이를 바탕으로 개별사업들의 상대적 차이와 포지션의 적절성에 대해 논의하였다. This study emphasizes the importance of the mission concept in managing the public programs by the government rather than the existing quantitative output. To this end, a case study for 7 representative National R&D Programs in Korea is presented, based on the program portfolio model using the mission construct suggested by the prior researches, in order to give its empirical validity and strategic meaning. For the case analysis, the study devises the measures to evaluate the level of the mission in a program in the aspect of achievement and appropriateness. Real data collected from NTIS are analyzed in two ways: static and dynamic perspectives. The first is conducted by differences of mission values among programs and the latter by yearly differences. Finally, it concludes the implication and the shortcoming of the study.
기술사마당_기술해설 - 감속기 수명 연장을 위한 오일 순환시스템의 마모분석 해석
이재근,Lee, Jae-Keun 한국기술사회 2010 技術士 Vol.43 No.2
This analysis introduces a lube oil circulation system for a big reducer in the chemical process industries. We have been operating the system and found out that the system greatly helped us save the maintenance cost by increasing the lifetime of the reducer.