플랜트 프로젝트의 구매조달단계 입찰평가 시스템 프레임워크 개발

한동환(Dong-Hwan Han),소지윤(Ji-Yune Soh),이준복(Junbok Lee),한충희(Choong-Hee Han) 대한설비공학회 2011 대한설비공학회 학술발표대회논문집 Vol.2011 No.7

For enhancing domestic EPC enterprise's competitiveness in the world market, it needs to achieve improvements in project management technique. Chief of all, procurement phrase comprise 50~60% of prime cost. Accordingly, expeditious management skill for procurement business affairs is urgently needed. The object of this research is to develop frame works for bid evaluation system of procurement phase which are possible to systematize bid evaluation task and support decision making. Research and development phrases are following in three steps. First, the detailed task process is builded for bid evaluation using the task process map from precedent studies. Second, functions for the system are designed according to the detailed task process. Third, the frame work is developed through the detailed task process and the functional components diagram for the system.

재난관리 프로젝트 성공요인과 PMO의 기능이 재난관리 업무성과에 미치는 영향에 관한 연구

한동환(Han, Dong-Hwan),부제만(Boo, Jeman),폴홍(Hong, Paul),김승철(Kim, Seung-Chul) 글로벌경영학회 2016 글로벌경영학회지 Vol.13 No.2

오늘날 우리나라뿐만 아니라 세계 여러 곳에서 자연재난과 사회재난이 발생하여 인명피해와 물적 손해를 입고 있다. 재난이 발생할 경우 중요한 것은 체계적인 관리 및 대응이다. 재난이 가진 특성을 살펴보면 재난은 프로젝트와 유사한 특성이 있다. 재난에 관련된 선행연구 중에서 재난관 리를 프로젝트 관리 관점에서 접근한 사례는 많지 않지만, 점차 늘어나는 추세다. 재난이 발생할 경우 혼란스러운 상황을 빠르고 효율적으로 대응하기 위해서는 통합적이고 체계적 관리가 필요하 다. 본 연구는 재난관리를 하나의 프로젝트로 간주하여 프로젝트 조직관리 방법론을 적용할 때 재난관리의 효율성에 미치는 영향을 조사한 연구다. 특히 재난관리를 통합적으로 지휘하는 프로젝트 조직의 리더십이 재난관리 업무성과에 유의한 영향을 미치는지 분석하였고 의사소통이 리더십과 재난관리 업무성과 사이에서 매개역할을 하는지 살펴보았다. 또한, 프로젝트 리더십을 효과적 으로 실행하기 위한 하나의 체계로서 프로젝트 관리 분야에서 주목을 받고 있는 PMO 기능이 어떤 영향을 줄 수 있는지 조절변수로 설정하여 조사하였다. 연구결과를 보면 리더십은 재난관리 업무성과에 유의한 영향을 미쳤으며, 의사소통은 리더십과 재난관리 업무성과 간에 매개 역할을 하는 것으로 파악되었고, PMO의 기능은 의사소통이 재난관리 업무성과에 미치는 영향에 조절효과를 미치는 것으로 파악되었다. 이는 여러 조직이 동시에 참여하게 되는 재난관리의 특성상 조직 간의 협력을 이끌어 내는 리더십이 재난관리에서 매우 중요한 것으로 파악됐다고 볼 수 있으며, 아울러 리더십을 효과적으로 발휘하기 위해서 PMO와 같은 구체적인 조직체계가 필요하다는 것을 본 연구의 결과가 보여준 것으로 여겨진다. Today, our country as well as in many parts of the world wearing a property damage and personal injury by natural disasters and social disasters. The important thing is the systematic management and response in case of a disaster. Looking at the characteristics of a disaster, disaster has similar properties to the project. Thesis approach to disaster management in project management point of view is not much among previous studies related to disaster, but the trend gradually increasing. In order to address the chaotic situation quickly and efficiently, integrated and systematic management requires when disaster occurred. This research is study about effect of disaster management efficient when apply project management methodology to disaster. Especially, we analyze how effect the leadership of project organization that manage disaster management syntagmatically to disaster work performance and we examine mediator effect of communication between leadership and disaster work performance. Also, we study about effect of PMO functions to disaster work performance by set PMO as moderating variable. The PMO is a system for implementing project leadership effectively. By presenting the results in this study to increase the disaster management performance by applying the leadership, also we confirm that communication has mediator effect between leadership and disaster work performance. PMO functions also have moderating effect between communication and disaster work performance. As a result, the leadership is critical to disaster management. Because disaster management need cooperation of various organization that engage to disaster. And also this study shows that if we want use effective leadership in disaster management, we need specific organization such as PMO.

19세기 ‘征韓論’의 虛構性에 대한 批判的 硏究

한동환(Han Dong-Hwan) 강원대학교 인문과학연구소 2012 인문과학연구 Vol.0 No.34

19세기 중반 동양으로 세력을 확장해 온 서구에 의해 조선, 청, 일본의 정국은 크게 요동친다. 단순한 정치적 격변이 아니라 문명적 변화를 가져온 기폭제였다. 동양 각국은 스스로 가지고 있는 힘을 최대한 발휘하여 향후 나라를 어떻게 만들어 갈 것인가? 하는 중요한 선택을 한다. 개혁 또는 혁명의 날을 세우거나 자강을 위한 쇄국을 기치를 걸고 대응하였다. 결과를 보면 일본은 침략적 제국주의 국가가 되었고, 조선은 식민지로 전락하였으며 중국은 열강의 각축 속에 약 100년간 치열한 전쟁을 치르게 된다. 각국이 처한 요소들의 작용에 의한 결과이지만 부인할 수 없는 것 중 하나가 바로 인접국 일본에 의한 요인이다. 그 요인의 핵심엔 일본 근대화를 이루는데 중요한 정치적 이념 역할을 하였던 ‘征韓論’이 있다. ‘征韓論’은 메이지 정부를 출범시키고 난 이후에도 일본 사회뿐만 아니라 한일관계에 있어서 차지하는 비중이 절대 작지 않다고 생각한다. 본고에서는 그동안 연구 성과를 축적해온 ‘征韓論’ 원인이나 내용보다는 ‘征韓論’의 속성 및 허구성에 대해 다음의 세 가지 관점에서 살펴보았다. 먼저 조선멸시관에 대한 역사적 조망, 그리고 征韓論’의 뿌리인 삼한정벌설의 신화적 내용애 대한 비판, 그리고 요시다 쇼인(吉田松陰)을 중심으로 일본 내 정치적 활용에 대한 비판으로 논지를 전개했다. 이런 세 가지의 논점에 주목한 이유는 왜곡에 의한 허구성이 다른 어떤 征韓論’의 내용 보다 선명하기 때문이다. 필자는 이러한 세 요소를 통해 征韓論’이 갖고 있는 허구성을 가지고 담론을 중심으로 19세기 한일관계의 본질을 침략과 허구라는 틀로 구성 했다. 그리고 이런 틀은 근현대 일본의 침략론과 왜곡된 역사인식의 시점이었음을 명확히 했다. The political situation in Chosun, Cheng and Japan was agitated by the mid-19th century, according as the Western powers expanded to the East. Such agitation was a catalyst for civilizational changes, rather than a political upheaval. Each of nations in East Asia focused on how to construct its country in the face of this political environment. They chose either reformation for importing Western civilization or seclusion for nation’s self-empowerment. As a result, Japan transformed into a invasive imperialist country, Chosun became colonized, and China was involved with fierce wars for about a century. Japan was undoubtedly a key factor that affected these changes in its neighboring countries. The Japanese political ideology ‘Seikanron’, which was at the core in achieving the modernization of Japan, was deeply involved in these changes. ‘Seikanron’ has a significant implication not only for Japanese historical trajectory since the launching of Meiji government, but also for the relationship between Korea and Japan. This paper focuses on discussing the properties and falsity of ‘Seikanron’ rather than reviewing its contents and cause. This paper discusses three perspectives on the Seikanron. The first is a historical review on Japan’s discourse of ‘contemptuous viewpoint on Chosun’, the second is a critical review on Japan’s ‘myth of subjugation of three kingdoms’, and the third is a review on the intentional appropriation and leverage of the Seikanron for political leverage along with discussing an exemplar figure Yoshida Shoin(吉田松陰). The falsity and distortion in the discourse of Seikanron is clearly evident in these three points. This paper approaches to the nature of Korea-Japan relationship through analyzing the falsity of the Seikanron within the framework of aggression and fiction. This framework provides a firm ground on which Japan’s imperial invasion and distortion of its national history has been implemented.

생물전환 기법을 이용한 토란 뿌리 추출물의 RAW 264.7 세포에 대한 항염증 효과

박태진(Taejin Park),심지한(Ji Han Sim),홍혜현(Hyehyun Hong),한동환(Dong-Hwan Han),김승영(Seung-Young Kim) 한국생물공학회 2020 KSBB Journal Vol.35 No.2

Biorenovation is a method of modifying the structure of a broad range of substrates such as chemical compounds and plant extract by microbial enzymes with the potential benefits of reduced cytotoxicities and enhanced biological activities relative to its parent substrates. We generated Colocasia esculenta L. Schott root extract using Biorenovation technology and tested the anti-inflammatory properties of its Biorenovation product (CEB) in lipopolysaccharide (LPS)-treated RAW264.7 murine macrophages. CEB inhibited the LPS-induced production of pro-inflammatory markers such as nitric oxide (NO), prostaglandin E2 (PGE2), interleukin-6 (IL-6), interleukin-1β (IL-1β), cyclooxygenase-2 (COX-2), inducible nitric oxide synthase (iNOS) in a concentration dependent manner without no noticeable toxicities in RAW 264.7 cells. Then together, our results indicate that CEB could be a new source for the ingredients of cosmetics and pharmaceuticals.

추출방법에 따른 청각 및 모과 추출물의 항균활성 및 기능성

김민선(Min-Seon Kim),김규민(Kyu-Min Kim),한동환(Dong Hwan Han),고광욱(Kwang-Wook Ko),김승영(Seung-Young Kim) 한국생물공학회 2018 KSBB Journal Vol.33 No.2

We have extracted Codium fragile in two ways : hot water extraction and alcohol extraction. We also have extracted dried fruit of chinese quince (Chaenomeles sinensis) with hot water. Antimicrobial activities of Codium fragile and Chaenomeles sinensis extracts were investigated using paper disc method and continuous sequential dilution method respectively. Total phenol and flavonoid contents were also measured. As a result, alcohol extracts of Codium fragile showed high antimicrobial activity and did not affect beneficial intestinal microorganisms. In addition, hot water extracts of Chaenomeles sinensis showed antimicrobial activity. These results suggest that alcohol extracts of Codium fragile and hot water extracts of Chaenomeles sinensis can be used as antimicrobial agents in various aspects. In addition, they exhibit high phenol content and are considered useful as functional materials.

디지털 소자용 방열판 제작을 위한 초고속 금속필름 증착장치 및 공정기술 개발

윤효은(Hyo Eun Yoon),안성준(Seong Joon Ahn),한동환(Dong Hwan Han),안승준(Seungjoon Ahn) 한국산학기술학회 2017 한국산학기술학회논문지 Vol.18 No.7

최근에 LED나 OLED와 같은 조명용 소자의 온도 상승에 따른 문제점을 개선하기 위하여 전기 도금 방법을 사용하여 제작한 두께가 두꺼운 금속 필름을 heat sink로 사용하고 있다. Cu 필름과 같은 두꺼운 금속 필름은 습식 방법인 전기 도금으로 제작하여 주로 소자의 방열판으로 사용되어 왔으나 건식의 증착 방법을 이용한 수 백 ㎛의 Cu 금속 필름에 대한 필요성이 요구되고 있다. 본 연구에서 설계⋅제작된 유도 가열 방식의 Cu 필름 증착 장비는 가열부가 세라믹 도가니 히터 부분과 세라믹 도가니 부분으로 분리된 이중 구조의 heating 방식을 채택하여 열 손실을 최소화 하고 보온 효과를 극대화시켰다. 또한 유도 가열 방식으로 초고속의 필름 증착 속도를 구현하였다. 그리고 열전도도가 높고 안정적인 두꺼운 Cu 필름 증착 기술을 확보하고 최적화 하여 1000 Å/s의 증착율로 100 ㎛의 필름을 증착 하였으며 ~2.0% 이내의 두께 균일도를 얻었다. To resolve the problem of the temperaturerise in LED or OLED lighting, until now a thick metal film has been used as a heat-sink. Conventionally, this thick metal film is made by the electroplating method and used as the heat-dissipating plate of the electronic devices. However, nowadays there is increasing need for a Cu metal film with a thickness of several hundred micrometers that can be formed by the dry deposition method. In this work, we designed and fabricated a Cu film deposition system where the heating element is separated fromthe ceramic crucible, which makes ultra-rapid deposition possible by preventing heat loss. In addition, the resulting induction heating also contributes to the high deposition rate. By tuning the various parameters, we obtained a 100-μm thick Cu film whose heat conductivity is high and whose thickness uniformity is better than 2%, while the deposition rate is as high as 1000 Å/s.

염생식물 갯질경 추출물의 미백 활성

김민진(Min-Jin Kim),현광희(Kwang Hee Hyun),김지혜(Ji-Hye Kim),한동환(Dong Hwan Han),김승영(Seung-Young Kim),이남호(Nam Ho Lee),현창구(Chang-Gu Hyun) 한국생물공학회 2017 KSBB Journal Vol.32 No.3

To identify the natural and novel cosmeceutical ingredients which have whitening function, we examined the effects of tyrosinase activity and melanin production on halophyte Limonium tetragonum (Thunb.) A. A. Bullock extracts. As a result, the extracts showed whitening effect with no cytotoxicity. Melanin contents of B16F10 melanoma cells were decreased in a dose-dependent manner at 50, 100, 200 μg/mL treatment of the extracts. In tyrosinase activity inhibition test, L. tetragonum (Thunb.) A. A. Bullock extracts showed decreased tyrosinase activity as the concentration of α-MSH was increased. Furthermore, it was observed that the tyrosinase and MITF expression was significantly downregulated by adding L. tetragonum (Thunb.) A. A. Bullock extracts in α-MSH, a melanogenesis inducing material, treated B16F10 melanoma cells. These results indicate that L. tetragonum (Thunb.) A. A. Bullock extract might be an effective whitening agent by inhibit melanin formation.

B16F10 흑색종 세포에 대한 Biorenovation 기법을 이용한 파리풀 캘러스 추출물의 Melanin 생성 억제 효과

이경미(Kyung-Mi Lee),박태진(Taejin Park),지은이(Eun Yee Jie),김석원(Suk Weon Kim),한동환(Dong-Hwan Han),김승영(Seung-Young Kim) 한국생물공학회 2021 KSBB Journal Vol.36 No.1

Bio-renovation is the microorganism-assisted conversion of the structure and improvement of biological efficacies of natural products and synthetic compounds. In this study, we investigated the effect of plant callus on anti-melanogenic effect and compared the activity changes of bio-renovated callus. Phryma leptostachya bio-renovation products at the concentrations of 100, 200, 400 μg/mL suppressed tyrosinase activity and the expression of melanogensis-related protein such as tyrosinase-related protein-1 (TRP-1), tyrosinase-related protein-2 (TRP-2) and microphthalmia-associated transcription factor (MITF) without a loss of cell viability in α-melanocyte-stimulating hormone (α-MSH)-stimulated B16F10 melanoma cells relative to its substrate. Moreover, cell viabilities of PLBR increased over the tested concentrations compared to its substrate (PL). PLBR at 400 μg/mL inhibited the α-MSH-induced melanogensis effect to the level of non-treated control. These results indicate that the structure of various compounds contained in Phryma leptostachya (PL) were modified through a bio-renovation technique and which conferred anti-melanogenic properties to PL.

유한대기열과 귀환을 갖는 일렬대기모형

한동환 선문대학교 첨단과학기술연구소 1999 첨단과학기술연구소 논문집 Vol.4 No.-

A multiple steam generator tube rupture (MSGTR) event has never occurred in the commercial operation of nuclear reactors while single steam generator tube rupture (SGTR) event is reported to occur every two years. As there is no occurrence of MSGTR event, the understandings of transients and consequences of this event are very limited. In this study, a postulated MSGTR event in Korea Next Generation Reactor (KNGR) is analyzed using thermalhydraulic system code. The KNGR is a two-loop, 3893 MWt, PWR supposed to be built in 2010. RELAP5/MOD 3 is used in this study. The present study aims to understand the effects of rupture location in heat transfer tubes and selection of affected steam generator following a MSGTR event. The effects of five tube rupture locations are compared with each other. The comparison shows that the response of KNGR is to allow shortest time for operator action following a tubes rupture in the vicinity of hot-leg side tube sheet and to allow longest time following a tube ruptures at the tube top. The MSSV lift time for rupture at tube-top is evaluated as 24.5% larger than that for rupture at hot-leg side tube sheet. Also, the MSSV lift time for four cases are compared in order to examine how long operator response time is allowed depending on which steam generator is affected. The comparison shows that the cases for both of two steam generators are affected allow longer time for operator action compared with the cases that a single steam generator is affected. Further more, the tube ruptures in the steam generator where a pressurizer is linked leads to the shortest operator response time.

PC통신에서의 적정회선수 산출 방법

한동환 선문대학교 ·중소기업기술지원연구소 1999 선문공대 연구/기술 논문집 Vol.4 No.1

본 논문에서는 통신처리시스템의 트래픽 유형을 분석하여 트래픽에 많은 영향을 주는 재시도 호의 의미에 대해서 설명하고 재시도 호가 트래픽에 어떤 영향을 미치게 되는지에 대해서 연구하려고 한다 또한,재시도 호를 분류하여 순수한 트래픽을 산출하고 이 트래픽을 이용하여 PC통신에서의 블로킹 확률과 호손율등 여러가지 변수에 대한 값을 계산함으로써 보다 경제적이고 질 좋은 서비스를 제공할 수 있는 기반을 마련하려고 한다. In this paper, we represent for calculating the effcient data, which is based on the classification of the pure traffic and the affects of user's retrial call statisticalIy. Our results provide the useful too for calculating the optimum data limes and the blocking rate with the variation of probability of call loss under the assumption that either the telephone lines or the data lines are fixed.