ATM 전송에서 인터넷 서비스 방안

민재홍,Min, Jae-Hong 한국정보처리학회 1999 정보처리학회논문지 Vol.6 No.11

Recently the number of Internet users have been drastically increased with the introduction of WWW browsers, which requires accommodation study of TCP/IP on ATM networks. There are a number of problems in operating IP-over-ATM efficiently because of limited functions and overhead of IP. According to recent research, the alternatives to TCP/IP efficiently because of limited functions and overhead of IP. According to recent research, the alternatives to TCP/IP over ABR or UBR have been suggested, and the required capacity of switch buffer and problems in TCP/IP over ABR have been researched. In this paper, we address problems caused by the features of HTTP traffic and suggest a solution for TCP over ABR. The performance of the methods suggested in this paper is verified through simulation under limited conditions.

소아 루프스 신염에 대한 기초 조사

민재홍,백경훈,박경미,김정수,하일수,정해일,김중곤,최용,Min Jae Hong,Paek Kyung Hoon,Park Kyung Mi,Kim Jung Sue,Ha Il Soo,Cheong Hae Il,Kim Joong Gon,Choi Yong 대한소아신장학회 1999 Childhood kidney diseases Vol.3 No.1

목 적 : 루프스 신염은 전신성 홍반성 낭창(systemiclupuserythematosus,SLE)의 가장 심각한 합병증 가운데 하나이지만, 소아 연령에서 루프스 신염에 대한 국내 연구는 미약한 실정이다. 본 연구는 루프스 신염 환자를 대상으로 빈도, 임상상, 치료반응, 예후 등에 대한 기초 조사를 실시하여 향후 전국 규모의 다기관 연구를 위한 기반 자료로 사용하기 위함이다. 방 법 : 1986년부터 1997년 11년 동안 서울대학교 어린이병원 소아과에 입원한 SLE환아 53례 중 신생검상 루프스 신염이 확인된 46례를 대상으로 후향적 의무기록 고찰을 시행하였다. 결 과 : 1) 전체 남녀비는 1:2.5, 루프스 신염의 진단 당시 정중연령은 12.8세(2세-15세 8개월)이었다. 2) ARA 분류 기준 중 형광항핵항체($85.7\%$), 항ds-DNA항체($78.0\%$), 나비모양 홍반($60.8\%$) 등이 가장 빈번히 관찰되었으며, 기타 검사 소견중에서는 C3의 감소($88.9\%$)가 흔하였다. 3) 혈뇨($87.0\%$)는 가장 흔한 신장 증상이었고, 신생검상 41례에서 WHO class IV 병변이 확인되었다. 4) Prednisolone, azathioprine, 경구 또는 정맥 cyclophosphamide 등을 단독 또는 병합치료 결과 대부분 환자에서 질환 활성도가 정상 혹은 중증도 이하로 조절되었으며, 치료 종류에 따른 반응도의 차이는 관찰할 수 없었다. 5) 감염은 치료 경과중 가장 흔한 합병증이었으며, 특히 Varicella-Zoster virus와 candida 감염증이 흔하였다. 결 론 : SLE 환아중 루프스 신염의 빈도는 $87.0\%$이었고, 그중 $89.1\%$가 장기적 예후가 불량한 WHO class IV 로 확인되었다. 따라서 신염 초기의 적극적인 면역억제제 사용이 장기적 예후 향상에 도움을 주리라 사료되며, 이에 대한 장기간의 전향적-비교연구를 위하여 다기관 공동연구가 절실히 필요하다. Purposes : Renal involvement is a potentially serious complication of systemic lupus erythematosus (SLE). There have been only few studies of lupus nephritis in pediatric age. In this study, the clinical manifestations, pathologic findings, response to treatment, and clinical course of lupus nephritis in children were analyzed. And the results will provide basic data for future nation-wide prospective multi-center study. Methods . The medical records of 46 children clinically and pathologically diagnosed to have lupus nephritis at Seoul National University Children's Hospital during 1986 to 1997 were analyzed retrospectively. Results : 1) The median age of diagnosis of lupus nephritis was 12.8 years ($2\;years\~\;15year$ 8months), and the sex ratio was 1:2.5. 2) FANA($85.7\%$), anti-ds-DNA antibody ($78.0\%$), and malar rash ($60.8\%$) were the most common findings among the classification criteria by ARA Decreased C3 was detected in $88.9\%$ of patients. 3) Hematuria ($87.0\%$) was the most common renal symptom, and WHO class IV lupus nephritis was identified in 41 cases by renal biopsy. 4) In most of patients, the disease activity was controlled relatively well with a single or combined therapy of prednisolone, azathioprine, or cyclophosphamide. The response revealed no difference according to the mode of treatment. 5) Infection, especially of Varicella-Zoster virus and candida, was the most common complication during the disease course. Conclusion : The renal involvement was noted in $87.0\%$ of childhood SLE, and $89.1\%$ of renal lesions was WHO class IV lupus nephritis known to associated with poor long-term prognosis. So, aggressive treatment using immunosuppressants in the early disease course may be helpful to increase long-term prognosis of lupus nephritis. A prospective multi-center study is necessary to analyze the therapeutic efficacy of various treatment modalities.

한국 학습자의 중국어 겸어문 오류 분석

閔載泓(Min, Jae-hong) 중국어문학연구회 2021 중국어문학논집 Vol.- No.130

This article study on the biased expression error in Modern Chinese “Jianyuju” of Korean Learner. “Jianyuju”(‘N₁ + V₁ + N₂ + V₂’) is a predicate type that arouses people’s constant discussion. In Modern Chinese “Jianyuju” means a sentence with its object plays as subject of the second verb simultaneously. It is difficult to use the perfect “Jianyuju” because it is a special sentence type among Chinese expressions, and it is a structure that does not exist in Korean. Korean learners also learned English from an early age, so most of them are familiar with the structure of ‘predicate + object’. This article theoretically analyzed Korean learner expressions of “Jianyuju”. The analysis was divided into three types : errors in non-use of “Jianyuju” components, errors in using “Jianyuju” components, and errors in “Jianyuju” sentence patterns. I think that this study of grammar theory can be a basis for reducing errors in practical application, and it is expected that Korean learners learning Chinese can reduce trial and error in the practice of using “Jianyuju”.

칼만 필터와 가중탐색영역 CAMShift를 이용한 휴먼 바디트래킹 및 자세추정

민재홍 ( Jae Hong Min ),김인규 ( In Gyu Kim ),황승준 ( Seung Jun Hwang ),백중환 ( Joong Hwan Baek ) 한국항행학회 2012 韓國航行學會論文誌 Vol.16 No.3

본 논문에서는 사람의 신체 일부분을 추적하는 시스템을 위해서 피부영역을 추출하고 여러 개의 영역을 추적하는 칼만 필터와 가중 탐색 영역을 이용한 다중 CAMShift 알고리즘(KWMCAMShift)을 제안한다. 배경모델을 구성하고 손과 얼굴의 피부색영역을 탐색 영역으로 하는 CAMShift를 제안한다. 이때 CAMShift의 유동적인 탐색영역을 안정화하기 위해 칼만 필터를 이용한다. 손과 얼굴 등이 상호 겹쳐지는 경우 탐색영역의 손실을 막기 위해 주 탐색영역과 비 탐색영역에 대한 가중치를 부가하여 서로 폐색 영역에 대한 회피 알고리즘을 제안한다. 얼굴 영역과 양손의 영역을 중심으로 인간의 자세를 추정하여 어깨와 손과의 관계로 팔꿈치를 추정하였고, 가우시안 배경 모델에 생성되는 그림자를 제거하여 발끝을 찾아 신체 전체를 추정하였다. 제안된 KWMCAMShift알고리즘을 적용하였을 때 폐색 시에도 96.82%의 인식률을 보였으며 실시간이 가능하였다. In this paper, we propose Modified Multi CAMShift Algorithm based on Kalman filter and Weighted Search Windows(KWMCAMShift) that extracts skin color area and tracks several human body parts for real-time human tracking system. We propose modified CAMShift algorithm that generates background model, extracts skin area of hands and head, and tracks the body parts. Kalman filter stabilizes tracking search window of skin area due to changing skin area in consecutive frames. Each occlusion areas is avoided by using weighted window of non-search areas and main-search area. And shadows are eliminated from background model and intensity of shadow. The proposed KWMCAMShift algorithm can estimate human pose in real-time and achieves 96.82% accuracy even in the case of occlusions.

Pilot valve 의 누유 원인 규명 및 개선을 위한 시험적 연구

민재홍(Jae Hong Min),이희태(Hee Tae Lee),안형환(Hyung Hwan Ahn) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.3

제트 팬 가동위치에 따른 장대터널 내 CO 농도 변화율에 대한 전산해석

민재홍(Jae-Hong Min),김대현(Dae-Hyun Kim),정진택(Jin-Taek Chung) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11

The purpose of tunnel ventilation system for long road tunnels is to keep certain levels of Visibility Index and the concentration of CO. Additional equipments such as jet fans are used in road tunnel to discharge pollutants in the road tunnel. The control algorism of tunnel ventilation system takes the value of sensors as input, and then gives the operation method of jet fans in tunnel as output. Information on the variation of CO concentration in tunnel when jet fans are running is needed to minimize their operation time. Numerical analysis is used in this paper because of the difficulty of conducting experiments under standard condition for ventilation of road tunnel. The concentration of CO has been calculated by using 3-dimensional CFD under transient condition with speed of cars, quantity of air ventilation, and the results for various operation position of jet fans are compared.

중국인의 성씨(姓氏)와 이름(名字) 연구

閔載泓(Min Jae hong) 한국중어중문학회 2007 中語中文學 Vol.40 No.-

Cohesive Zone 모델을 이용한 에폭시-금속 접합부의 구조강도 평가

민재홍(Jae Hong Min),이희태(Hee Tae Lee) 대한기계학회 2023 대한기계학회 춘추학술대회 Vol.2023 No.11

Epoxy, a polymer material, is actively used in many fields because it has excellent insulation performance and strength and light weight. However, it is difficult to predict the strength of the adhesive zone formed as the epoxy was cured on the conductor surface. Therefore, this paper used the CZM (Cohesive Zone Model) model in Abaqus CAE(Computer Aided Engineering) program to obtain an analysis model to evaluate the structural strength of adhesive zone and experimentally verified it.

경량전철 무인자동운전의 비용 절감 효과 분석

민재홍(Min Jae-Hong) 한국철도학회 2000 한국철도학회 학술발표대회논문집 Vol.- No.-

Light Rail is highlighted for its construction cost and operation & maintenance cost in Korea. However, lack of analysis on driverless operation effect causes many disputes. In this paper, using latest driverless operation cost data, analysed cost reduction effect of it, with comparing present KNR"s metropolitan subway signal system. It showed there is enough economic appropriateness B/C 1.241 on interest rate 6%, 1.076 on 8% and 0.943 on 10%, though it couldn"t include passenger travel time value.

철도수송수요 예측시스템 제안

민재홍(Min Jae-Hong) 한국철도학회 2003 한국철도학회 학술발표대회논문집 Vol.- No.-

It is very difficult to find optimal train operation plan when analyzing the economic investment using traditional railroad travel demand estimation method. Train operation plan depends on travel demand and vice versa. To solve this problem, this study suggests a demand estimation method to address an optimal train operation scheme with the modal spilt using initial train operation plan and trip assignment.