광 기록 시스템을 위한 멀티모드 변조 코드의 DC-억압 코드 선택 방법

이명진,이준,이재진,Lee, Myoung-Jin,Lee, Jun,Lee, Jae-Jin 한국통신학회 2003 韓國通信學會論文誌 Vol.28 No.3C

Multi-mode coding method is a reliable DC-suppression method. There are two ways to improve the DC-suppression performance. One is improving scrambler's performance, and the other is improving selection criteria. The latter uses the MRDS(minimum running digital sum) criterion. It is easy to calculate, but its performance goes down when the length of codeword is getting longer. The MSW(mean squared weight) criterion that is known as the best so far regardless of the length of codeword has the high complexity. In this paper, we present the new selection criteria, MPRDS(minimum peak RDS) and A BSRDS(absolute RDS). Their performance are close to the MSW, implementation is simple. And also we present the SC(sign change) that has a subsidiary role with the original selection criteria and improve the capacity. 신뢰할 수 있는 DC-억압(DC-suppression) 방법으로 멀티모드 코딩 방법이 있다. 멀티모드 코드의 DC-억압 성능을 향상시키는 방법에는 스크램블러(scrambler)의 성능을 개선하는 방법과 후보 코드워드의 선택 기준(selection criteria)을 개선하는 방법이 있다. 후보 코드워드의 선택 기준으로 흔히 사용되는 MRDS(minimum running digital sum) 기준은 계산 및 구현이 쉬운 반면에 후보 코드워드의 길이가 길어질수록 성능이 저하되는 단점이 있다. 코드 워드 길이에 무관하게 최고의 성능을 갖는 MSW(mean squared weight) 기준은 구현상의 복잡도가 높다는 단점을 가진다. 본 논문에서는 이론상으로 가장 효율이 우수한 MSW의 성능에 근접하면서, 하드웨어 구현이 용이한 MPR DS(minimum peak RDS)와 ABSRDS(absolut RDS)라는 새로운 선택 기준을 제시하였고, 기존의 선택 기준과 함께 사용 시 보조적인 역할을 하여 성능 향상을 도모할 수 있는 SC(sign change) 알고리즘을 제시하였다.

이명진_에스에이치 프로젝트

이명진(Max Lee) 현대건축사 2013 월간 CONCEPT Vol.- No.177

원격탐사활용을 위한 딥러닝기술

이명진,이원진,이승국,정형섭,Lee, Moung-Jin,Lee, Won-Jin,Lee, Seung-Kuk,Jung, Hyung-Sup 대한원격탐사학회 2022 大韓遠隔探査學會誌 Vol.38 No.6

Recently, deep learning has become more important in remote sensing data processing. Huge amounts of data for artificial intelligence (AI) has been designed and built to develop new technologies for remote sensing, and AI models have been learned by the AI training dataset. Artificial intelligence models have developed rapidly, and model accuracy is increasing accordingly. However, there are variations in the model accuracy depending on the person who trains the AI model. Eventually, experts who can train AI models well are required more and more. Moreover, the deep learning technique enables us to automate methods for remote sensing applications. Methods having the performance of less than about 60% in the past are now over 90% and entering about 100%. In this special issue, thirteen papers on how deep learning techniques are used for remote sensing applications will be introduced.

영상레이더 환경 분야 활용 기술 및 체계 정립

이명진,윤정호,조남욱,한현경,이선민,Lee, Myeong-Jin,Yun, Jeong-Ho,Jo, Nam-Uk,Han, Hyeon-Gyeong,Lee, Seon-Min 한국수자원학회 2019 물과 미래(한국수자원학회지) Vol.52 No.10

역행성 골수강 내 금속정을 이용한 경-거-종골 유합술의 술 후 결과

이명진,이영구,김동률,유정우,Lee, Myoung Jin,Lee, Young Koo,Kim, Dong Ryul,Yoo, Jung Woo 대한족부족관절학회 2015 대한족부족관절학회지 Vol.19 No.4

Purpose: Tibiotalocalcaneal arthrodesis has been used as a treatment option for severe deformity including Charcot arthropathy, avascular necrosis of the talus, and severe osteoarthritis of the ankle and subtalar joint. The purpose of this study was to evaluate the result of the surgical outcome of tibiotalocalcaneal arthrodesis using a retrograde intramedullary nail. Materials and Methods: Tibiotalocalcaneal arthrodesis using a retrograde intramedullary nail was performed by one surgeon in 36 cases. Clinical and radiological finding was evaluated using assessment of fusion time, 5th metatarsal-tibial angle, possibility of postoperative complication, visual analogue scale for pain and American Orthopaedic Foot and Ankle Society (AOFAS) score. Results: Union was achieved in 33 cases at an average of 23 weeks (11~29 weeks). There were 3 cases of nonunion and 1 case of reoperation. Nail-tibial angle tended to be larger in nonunion cases. AOFAS score showed significantly poor outcome at malalignment (${\geq}5^{\circ}$), negative value of 5th metatarsal-tibial angle. Conclusion: Tibiotalocalcaneal arthrodesis using a retrograde intramedullary nail is considered a useful treatment option for severe destruction and deformity involving ankle and subtalar joint.

고강도 용착금속의 미세조직이 저온균열에 미치는 영향

이명진,강남현,Lee, Myung-Jin,Kang, Nam-Hyun 대한용접접합학회 2014 대한용접·접합학회지 Vol.32 No.1

In the past, cold crack was commonly observed in the HAZ(heat affected zone) of high-strength steels. Applying to TMCP(thermo-mechanical controlled process) and HSLA(high strength low alloy) steels, cold crack tends to increase the occurrence in the weld metal. It is generally understood that cold crack occurs when the following factors are present simultaneously : diffusible hydrogen in the weld metal, a susceptible microstructure and residual stress. In particular, many studies investigated the microstructural effect on the cold crack in HAZ and the cold crack in weld metals starts to receive the special attendance in modern times. The purpose of the study is to review the effect of weld microstructures (grain boundary ferrite, Widm$\ddot{a}$nstatten ferrite, acicular ferrite, bainite and martensite) on cold crack in the weld metals. Among various microstructures of weld metals, acicular ferrite produced the greatest resistance to the cold crack due to the fine interlocking nature and high-angle grain boundary of the microstructure.

대기오염관계 유해물질의 처리기술(3)

이명진,Lee, Myeong-Jin 한국설비기술협회 1992 설비 : 공조ㆍ냉동ㆍ위생 Vol.9 No.5

An Agent Communication Language for Negotiation in BDI Agents Environments

이명진,김진상,Lee, Myung-Jin,Kim, Jin-Sang Korea Information Processing Society 2003 정보처리학회논문지B Vol.10 No.1

Negotiation plays a fundamental role in human cooperative activities, allowing people to resolve conflicts that could interfere with cooperative behaviors. Negotiation In multi-agent systems is achieved through the exchange of messages In a shared agent communication language (ACL). We introduce a rational negotiation meta-language for autonomous, self-interested, and resource-bounded artificial BDI agents. We then propose a negotiation protocol for BDI agents with communicative acts based on their mental states. 인간의 협동적인 활동에서 협상은 협동적인 행위를 방해할 수 있는 충돌을 해결하는데 중요한 역할을 담당한다. 이를 위해 멀티 에이전트 시스템에서의 협상이 공통의 에이전트 통신 언어를 사용하는 메시지의 교환을 통해 진행한다고 가정한다. 본 논문에서는 자율적이고, 자기 목표에 충실하면, 한정된 자원을 가진 BDI 에이전트를 위한 합리적인 협상 메타 언어를 가정한다. 또한 에이전트의 정신적인 상태에 바탕을 두고 통신하는 BDI 에이전트를 위한 협상 프로토콜을 제안한다.

계층분석법(AHP)과 GIS를 이용한 고양시 일대의 지하수오염 관리우선순위 평가

이명진,현윤정,김영주,황상일,Lee, Moung-Jin,Hyun, Yunjung,Kim, Youngju,Hwang, Sang-Il 한국지하수토양환경학회 2013 지하수토양환경 Vol.18 No.5

In this study, priority for groundwater contamination management was assessed based on regional vulnerability in Goyang-si area, Gyonggi-do, Korea using analytic hierarchy process (AHP) and geographic information system (GIS). We proposed a concept for regional vulnerability to groundwater contamination with using socio-environmental vulnerability factors, which can be classified into three properties including regional hydrogeological property, contamination property, and groundwater use property. This concept is applied to Goyang-si area. For AHP analysis, an expertise-targeted survey was conducted. Based on the survey, a total of 10 factors (criteria) and corresponding weights for regional vulnerability assessment were determined. The result shows that regional contamination property is the most weighted factor among the three property groups (hydrogeological property: contamination property: groundwater use property = 0.3: 0.4: 0.3). Then, database layers for those factors were constructed, and regional vulnerability to groundwater contamination was assessed by weighted superposition using GIS. Results show that estimated regional vulnerability score is ranged from 22.7 to 94.5. Central and western areas of Goyang-si which have groundwater tables at shallow depths and are mainly occupied by industrial and residential areas are estimated to be relatively highly vulnerable to groundwater contamination. Based on assessed regional vulnerability, we classified areas into 4 categories. Category 1 areas, which are ranked at the top 25% of vulnerability score, take about 2.8% area in Goyang-si and give a high priority for groundwater contamination management. The results can provide useful information when the groundwater management authority decide which areas should be inspected with a high priority for efficient contamination management.

족부에 재발한 지방종 거대증: 증례 보고

이명진,김동률,Lee, Myoung Jin,Kim, Dong Ryul 대한족부족관절학회 2016 대한족부족관절학회지 Vol.20 No.1

We reported on a rare case of recurred macrodystrophia lipomatosa of the foot, and reviewed the literature. A 62-year-old male patient presented with right foot second toe pain; preoperative magnetic resonance imaging and radiograph examination was performed. After surgery the biopsy confirmed the diagnosis. American Orthopaedic Foot and Ankle Society score was checked before and after surgery. Wide excision of the affected area including ray amputation is an effective way to prevent recurrence and relieve the pain after surgery. The 2nd toe ray amputation was performed in the treatment of recurred macrodystrophia lipomatosa of the foot, and is thought to be an effective way to relieve pain and prevent recurrence. After minimally invasive surgery with complete excision surgery, additional data on recurrence and pain relief rate are needed.