색 분포 재배열을 이용한 색 분별력 향상 색역 사상

이재민,김경만,이채수,이철희,하영호,Lee, Jae-Min,Kim, Kyeong-Man,Lee, Chae-Soo,Lee, Cheol-Hee,Ha, Yeong-Ho 대한전자공학회 1999 電子工學會論文誌, S Vol.s36 No.10

많은 칼라 장치에서 동일한 영상을 출력했을때, 재현된 색들은 장치 사이의 색역 차로 인해 많은 차이를 나타내므로 이를 개선하기 위한 많은 색역 사상 방법들이 제안되었다. 본 논문에서는 기존의 장치 의존적 색역 사상의 단점인 압축 사상에서의 불필요한 왜곡을 줄이고 절단 사상에 의한 색 분별력 저하를 최소화시키기 위해 색 분포 재배열을 이용한 색 분별력 향상 색역 사상 방법을 제안한다. 제안한 방법은 입력 영상의 색을 색 분포라는 3차원 배열로 구성한다. 색 분포의 최대치가 출력 장치 색역의 경계치보다 작다면 같은 색으로 사상을 한다. 반대로 크다면 색역 내부에 색역 외부의 색을 재배열하여 사상을 한다. 결과적으로 모니터에 나타난 영상을 색과 비슷하고 채도가 높은 색이 선형적으로 변하는 영역에서 색의 분별력이 높은 영상을 프린터로 재현할 수 있었다. When the same image is displayed in many different devices, the reproduced colors are not same due to the differences in the gamut between devices. Therefore, many gamut mapping method were proposed to solve this problem. In this paper, color discrimination enhancement gamut mapping method using color distribution rearrangement is proposed to reduce the unnecessary distortions by compression mapping and to minimize the decrease of color discrimination by clipping method. The proposed method constructs color distribution, the 3-dimension array of input image's colors. if the maximum of color distribution is within the boundary of printer gamut. the colors are mapped to the same colors. Otherwise, out-of-gamut colors are compressed into the printer gamut with minimum distortion. Consequently, the printer output image was highly consistent with the corresponding monitor image and had an enhanced color discrimination in region where high chroma varied linearly.

지하수 오염복원에서 현장규모 이방성의 효과

이재민,이병선,우남칠,Lee, Jae-Min,Lee, Byung-Sun,Woo, Nam-Chil 한국지하수토양환경학회 2010 지하수토양환경 Vol.15 No.6

As a preliminary survey to improve efficiency of well-based permeable reactive barrier system for groundwater remediation, this site-scale study was carried to identify the flowpaths and controlling factors of plume at a remediation site in Suwon City, Korea. A total of 22 monitoring wells were installed as a grid system in the $4m{\times}4m$ square area by 1-m interval. For the groundwater characterization, various tests were performed including water-level monitoring, water sampling & analysis, pumping and slug tests, and tracer tests. The aquifer appeared to be unconfined with hydraulic conductivities (K) ranging from $2.6{\times}10^{-4}cm/s$ to $9.5{\times}10^{-3}cm/s$. The average linear velocity of groundwater was estimated to be $2.94{\times}10^{-6}m/s$, and the longitudinal dispersivity of a conservative tracer to be $5.94{\times}10^{-7}m^2/s$. Groundwater plume moves preferentially through the high-K zones, and the relatively high ion concentrations along the low-K zones implying deterred groundwater flow. Consequently, the spatial variation of hydraulic conductivity caused by aquifer heterogeneity and anisotropy appears to be the most important factor to maximize the effect of plume treatment system for application of in-situ groundwater remediation techniques.

아날로그 회로의 난검출 고장을 위한 효과적인 진단 및 테스트 기법

이재민,Lee, Jae-Min 대한임베디드공학회 2009 대한임베디드공학회논문지 Vol.4 No.1

Testing of analog(and mixed-signal) circuits has been a difficult task for test engineers and effective test techniques to solve these problems are required. This paper develops a new technique which increases fault detection and diagnosis rates for analog circuits by using extended MTSS (Modified Time Slot Specification) technique based on MTSS proposed by the author. High performance current sensors with digital outputs are used as core components for these techniques. A fault diagnosis structure with minimal hardware overhead in ATE is also described.

이벤트 기반 웹서비스를 이용한 워게임 시뮬레이터 제작

이재민,김병철,김태섭,이강선,Lee, Jae-Min,Kim, Byoung-Chul,Kim, Tae-Sup,Lee, Kang-Sun 한국시뮬레이션학회 2010 한국시뮬레이션학회 논문지 Vol.19 No.1

As future warfare becomes network-centric, war-game simulators require high interoperability between networked forces and dynamic reconfiguration in accordance with war events. In this paper, we propose an event-driven methodology to develop dynamic war-game simulations. Federates are developed by event-driven web services. The event-driven web services consistently sense war events and response them only if they are interested. By the sense-and-response mechanism and asynchronous event processing, we are able to save simulation time. An Anti-Surface-Warfare simulator is constructed to demonstrate the methodology and suggests that event-driven web services are efficient to model and simulate warfare where numerous events are generated from hardware systems and people dispersed on the network.

장기모니터링을 통한 지하수계의 이해 - 광릉소유역 사례 연구

이재민,우남칠,Lee, Jae-Min,Woo, Nam-C. 한국지하수토양환경학회 2012 지하수토양환경 Vol.17 No.4

Effects of climate change on groundwater system requires understanding the groundwater system in temporal and spatial scales through the long-term monitoring. In this study, the spatio-temporal variations of groundwater were analyzed through the continuous observation of water level, electrical conductivity (EC) and water temperature with automatic data-loggers and sampling in a Gwangneung catchment, Korea, for the four years from 2008 to 2011. Groundwater monitoring were performed at the nest-type wells, MW1 and MW2, located in upsteam and downstream of the catchment, respectively. During the survey period, both the total amount of annual precipitation and the frequency of concentrated rainfall have increased resulting in the elevation of runoff. Water level of MW1 showed no significant fluctuations even during the rainy season, indicating the confined groundwater system. In contrast, that of MW2 showed clear seasonal changes, indicating the unconfined system. The lag-time of temperature at both wells ranged from one to three months depending on the screened depths. Results of chemical analyses indicated that major water compositions were maintained constantly, except for the EC decreases due to the dilution effect. Values of the stable-isotope ratios for oxygen and deuterium were higher at MW2 than MW1, implying the confined system at the upstream area could be locally developed.

급성 골수성 백혈병 소아환자에서 초음파 검사에서 낭미충증으로 오인된 표피 포도알균에 의한 파종 감염 병변이 발생한 증례

이재민,최준식,유건희,김예진,김선자,Lee, Jae Min,Choi, Joon-Sik,Yoo, Keon Hee,Kim, Yae-Jean,Kim, Sun-Ja 대한소아감염학회 2020 Pediatric Infection and Vaccine Vol.27 No.2

표피 포도알균은 사람 피부에 있는 정상균이나, 체내 이물질을 가진 사람이나 면역 저하자에게는 심각한 감염을 일으킬 수 있다. 13세 남자가 발열, 근육통으로 입원하였고 두피, 팔과 다리에 통증이 있는 결절성 병변이 만져졌다. 혈액검사에서 범혈구 감소증과 모세포 80% 소견을 보였고 급성 골수성 백혈병으로 진단되었다. 전신 자기공명영상 검사에서 가장자리 조영 증강을 보이는 다발 낭성 병변이, 초음파 검사에서 에코성 낭성 병변과 그 내부의 에코성 결절이 팔과 다리의 근육 내부에서 관찰되어, 낭미충증이 강력히 의심되었다. 그러나 초음파 유도하 조직 검사에서 농양이 확인되었고, 조직 배양검사에서 표피 포도알균이 동정되었다. 저자들은 백혈병 환자에서 낭미충증으로 오인되었던 표피 포도알균에 의한 전신 다발 병변이 발생한 예를 경험하였기에 보고하는 바이다.

FOLFIRINOX 병합요법을 통한 이차 항암화학요법으로 완전 관해를 획득한 진행성 췌장암 증례

이재민,정광현,박진명,이상협,류지곤,김용태,Jae Min Lee,Kwang Hyun Chung,Jin Myung Park,Sang Hyub Lee,Ji Kon Ryu,Yong-Tae Kim 대한소화기암연구학회 2014 Journal of digestive cancer reports Vol.2 No.1

Pancreatic cancer is a highly aggressive cancer with poor prognosis. Although, gemcitabine is the current standard regimen as first-line chemotherapy for advanced pancreatic cancer, effective regimens of second-line chemotherapy after gemcitabine failure have not been established yet. We report a case of gemcitabine refractory pancreatic cancer treated with second-line chemotherapy with FOLFIRINOX regimen. A 57-year-old-woman visited our hospital for pancreatic body mass detected by computed tomography (CT). The patient underwent distal pancreatectomy and splenectomy and the pathologic results after surgery demonstrated adenocarcinoma. Follow-up was performed after surgery and CT and positron emission tomography (PET) 4 months after surgery revealed multiple hepatic metastases. The patient underwent first-line chemotherapy with gemcitabine and erlotinib for recurred pancreatic cancer. However, CT after 7 cycles of the chemotherapy showed the progression of multiple hepatic metastases and switch to second-line chemotherapy with FOLFIRINOX was initiated. CT after 16 cycles of the FOLFIRINOX showed the complete remission of multiple hepatic metastases. The patient was admitted for infective endocarditis with septic pneumonia 17 months after the initiation of FOLFIRINOX. However, the patients died from the progression of septic embolism and acute respiratory distress syndrome.

치아표면 처리에 따른 치면열구전색재의 전단강도에 관한 비교실험연구

이재민,신승철 ( Jae Min Lee,Seung Chul Shin ) 대한예방치과·구강보건학회 1994 大韓口腔保健學會誌 Vol.18 No.1

국내 기관 레포지터리 구축 및 활성화 방안 - KAIST의 KOASAS 사례를 중심으로 -

이재민,손청기,이미영,Lee, Jae-Min,Son, Chung-Ki,Lee, Mi-Young 한국과학기술정보연구원 과학기술정보센터 2008 Journal of Information Science Theory and Practice Vol.39 No.3

전통적으로 연구자들은 학술지를 통하여 연구결과를 공식적으로 발표하고 인정받아 왔으며, 그 이후 학회, 출판사, 대학 등의 단체가 학술지의 출판에 주력함으로서 학술지는 양적 질적 성장을 거듭해왔다. 최근 학술정보 유통에서 출판사들의 지나친 가격급등 및 상업화 전략으로 인해 학술정보에 대한 접근과 이용이 제한되고 있으며, 이에 따라 공공재인 학술정보를 무료로 이용할 수 있어야 한다는 주장을 전제로 오픈 액세스(OA)운동이 등장하게 되었다. 이에 본 논문은 오픈 액세스의 가장 핵심적인 실천전략이라 할 수 있으며 대표적인 기관 레포지터리라고 할 수 있는 DSpace 시스템을 소속 기관의 환경에 맞게 재개발한 KOASAS의 구축 및 운영사례를 분석함으로써, 국내대학 및 기관의 레포지터리 구축에 대한 필요성과 활용방안을 제시하고자 한다. Researchers' performances have been evaluated by contributing to the academic journals officially, and academic journals expanded both quantitatively and qualitatively since academic societies, publishers, and universities has concentrated on publishing journals. Recently, access and usage of academic information was restricted due to commercialization strategies and sudden rising of prices, and against this situation, OA movement came out arguing that academic information should be open to everyone freely. This article studies the case of KOASAS which is based on DSpace, one of the typical institutional repositories, and intends to show up the necessity to construct repositories in institutions universities and suggest the method to make full use of repositories.

선회와류식-SBR(하)

이재민,Lee, Jae-Min 한국환경기술인연합회 2006 환경기술인 Vol.23 No.8