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Visible Light Induced Degradation of Recalcitrant Pollutants Using Modified TiO2 Photocatalysts
최원용,배은영,김순현,경현숙 한국화학공학회 2007 화학공학의이론과응용 Vol.10 No.1
Dye-sensitized TiO2 and platinum ion-doped TiO2 photocatalysts were synthesized and their physicochemical characteristics and visible light reactivities were investigated. When ruthenium complexes were used as a sensitizer of TiO2, the visible light induced degradation of perchlorocompounds could be achieved through a reductive path. However, the sensitized TiO2 is not stable enough to be a practical photocatalyst. In a related sensitized TiO2 system, a simultaneousremoval of dyes and heavy metal ions was observed in visible light illuminated TiO2 suspensions and the removal rate of each component was synergistically enhanced. The electron injection from an excited dye into the conduction band of TiO2 and the subsequent reduction of metal ions on TiO2 take place concurrently to exhibit a novel synergic effect. This model system of ternary components (dye/ TiO2/metal ion) can be a basis of solar remediation technology for dye-contaminated wastewaters. On the other hand, platinum ion doped TiO2 as a visible light photocatalyst was synthesized and characterized to demonstrate its successful performance in degrading recalcitrant organic pollutants.
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Modeling of Target Detection in Local Search for Phased Array Radar Tracking
최원용,홍순목 제어·로봇·시스템학회 2009 International Journal of Control, Automation, and Vol.7 No.6
The local search in tracking with a phased array radar can be characterized in terms of the events that can occur in the search and the probabilities of those events. In predicting the event probabilities, it is required to evaluate the expectation of a product of target detection probabilities for repeated beam-positioning in the local search. In this paper, we present a model of the local search and derive an expression for the expectation of the detection-probability product. An expression of angular measurement accuracy of target detection is also presented. Evaluation of the expressions requires numerical integration, which is computationally expensive. Approximations to the expressions are presented in analytic form, which are fairly accurate.
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최원용,이종태 동국대학교 산업기술연구원 2001 산업기술논문집 Vol.12 No.2
This study focuses on the establishment of quality management system that satisfies quality management system of ISO 9000 and the certification system of quality management system and is able to hold a program that can improve quality. For this purpose, we did, we did research on literature and the case of M company, a service provider for overseas study. The introducing chapter explains the purpose, method, and range of research and the concept and configuration of quality management system in addition to its certification system and procedure. In addition, through the study case of M, a service provider, it tries to contribute to the settlement and improvement of the system, by the execution of quality management system. It suggests the method of system documentation for a service provider through the process of documentation by M company. The concluding chapter summarizer the research results and discusses the future assignments.
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The Effects of Internal Governance Mechanisms on Voluntary Disclosure
최원용 한국인적자원관리학회 2019 인적자원관리연구 Vol.26 No.4
Researches on the effects of internal governance mechanisms report contradictory results. Some researchers argue that internal governance mechanisms are able to reduce agency problems, but others assert that they are not effective and just spend firms’ resources. This study suggests that internal governance mechanisms may have different effects depending on managerial activities. Managers tend to comply with internal governance mechanisms in the managerial activities, such as disclosing activity, whose results are obvious and assessable because the consequences of their actions can be easily observed and evaluated by governance mechanisms. In the other hands, because it is difficult to evaluate whether managers’ actions are for shareholders’ value in ambiguous and non-assessable activities, managers eagerly entrenches themselves to protect their position and privilege. Therefore, internal governance mechanisms are more effective in obvious and assessable managerial activities than ambiguous and non-assessable ones. In this study, I investigated the effects of internal governance mechanisms on voluntary disclosure; the obvious and assessable activity. An empirical test was conducted on 331 Korean firms in 2017. This study found that the stronger internal governance structure, such as outside directors and stock option, the more a manager is likely to disclose the performance expectation or goal.
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한국형제조혁신 방법론에 대한 실증적 연구 : M 기업의 사례를 중심으로
최원용 대한안전경영과학회 2012 대한안전경영과학회 학술대회논문집 Vol.2012 No.1
최근 글로벌 경쟁이 치열해 지면서 가격경쟁력이 뒷받침되지 않으면 신흥 시장에 대한 대응이 어려워져 가격경쟁력의 중요성이 부각되고 있으며, 구 조적인 비용 상승 추세로 기업의 원가 압력이 증대되고 있고, 이러한 변화된 경쟁 환 경에서 생존하기 위 해서는 전체적인 생산성 향상이 필수이다. 가격경쟁력 강화 및 원 가압박을 해소하고 품질, 가격, 납기 전반에 모방할 수 없는 차별화된 경쟁력의 확보는 생산성 향상을 통 해서 실현할 수 있고, 생산성 향상을 통한 경쟁력 있는 기업 육성은 우리 제조업을 발 전시키는 토대(infra structure)이며, 기반 시설의 확충이다. 본 연구에서는 현재 외국의 혁신방법을 우리산업 현실에 대한 고려 없이 단순 도입 으로 국내 실정에 맞지 않아 상당한 시행착오를 격고 있으며, 국내 에 벤치마킹 할만한 제조혁신 방법론이 거의 없고, 벤치마킹하려고 해도 기업의 영업비 밀이라 배우기도 쉽 지 않은 상황에서 우리산업 현실에 맞는, 중소·중견기업의 맞춤형 생산성 혁신 지원 도구로 중소기업의 자생적인 혁신을 위해 중소기업의 수준에 맞는 제조혁신 방법을 국내외 제조혁신 전문가로 컨소기엄을 구성하여 한국생산성본부에 서 개발된 한국형제 조혁신 방법론을 제조기업에 적용하여 성공적인 결과를 다른 기업 에 적용 할 수 있도록 하는데 목적을 둔다. 연구목적을 달성하기 위해 문헌연구를 통해 일본의 TPS(Toyota Production System), 미국의 Lean 시스템 및 6시그마 시스템에 대 하여 살펴보았고, 한 국형 제조혁신 모델인 KPS(korea production system)를 통신장비 제조회사인 M. 사 에 적용하여 실증하였으며, 그 결과 우수한 성과를 보임을 확인할 수 있었다.
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