ATM 멀티캐스트 스위치에서 복사 네트워크의 셀 분배 알고리즘

이옥재,전병실,Lee, Ok-Jae,Chon, Byoung-Sil 대한전자공학회 1998 電子工學會論文誌, S Vol.s35 No.8

본 논문에서는 복사 네트워크의 멀티캐스트 셀을 적절하게 분배할 수 있는 새로운 분배 알고리즘을 제안한다. 합산기, 분배기, 가상 주소 부호기, 방송 네트워크가 이원적으로 구성된 복사 네트워크는 제안된 분배 알고리즘에 의하여 낮은 번지와 높은 번지가 양분되어 동시에 동작하기 때문에 입력된 셀이 균등하게 처리되어 셀 지연율과 입력 공정성이 개선되고 복잡도가 감소된다. 또한 방송 네트워크로 이진 트리와 Banyan 네트워크로 구성된 확장 Banyan 네트워크를 사용하여 오버플로우 발생 확률을 1/2로 감소 시킨다. 분석 결과 제안된 알고리즘은 입력 버퍼에서 셀 지연율이 확연하게 감소됨을 알 수 있었다. In this paper, a new algorithm is proposed which distributes multicast cells in a copy network. The dual copy network is composed of running adder network, distributor, dummy address encoder, and broadcasting network. It is operated lower input address and higher one simultaneously by the distribution algorithm. As a result, for each input has a better equal opportunity of processing, cell delay and hardware complexity are reduced in copy network. Also, for it adopts the broadcasting network from an expansion Banyan network with binary tree and Banyan network, overflow probability is reduced to a half in that network. As a result of computer simulation, the copy network processed by the distribution algorithm is remarkably improved in cell delay of input buffer according to all input loads.

대청호에서의 질화작용

이옥재,이일규,박희진,안태영 ( Ok Jae Rhee,Il Gyu Lee,Hee Jin Park,Tae Young Ahn ) 한국하천호수학회 1995 생태와 환경 Vol.28 No.1

The nitrification rate and environmental factors were estimated 12 times at 4 stations from March 1992 to January 1994 in Daechung reservoir. The number of nitrifying bacteria and nitrification rate were measured with MPN and ^14C-dark incorporation method, respectively. The distribution of ammonia-oxidizing bacteria was 0.5∼220MPNml^-1(mean, 13MPNml^-1) and that of nitrite-oxidizing bacteria was ND-42MPNml^-1(mean,3MPNml^-1). The range of nitrification rate was 0.01∼7.15㎍-Nl^-1day^-1(mean, 0.74㎍-Nl^-1day^-1) and the highest value was 7.15㎍-Nl^-1day^-1 at station 3 where lots of fishfarm were located. Being showed through multiple regression analysis from all data estimated, the distribution of nitrification was affected by change of ammonia concentration, but not affected by nitrifying bacterial population.

존재론적 장소개념에 의한 전통공간 해석에 관한 연구

이옥재(Lee, Ok-Jae),김문덕(Kim, Moon-Duck) 한국실내디자인학회 2014 한국실내디자인학회논문집 Vol.23 No.4

Nowadays when the social and cultural paradigm is changing, the incomplete space is becoming a matter of controversy. In order to figure out the solutions to it, are being held a variety of spatial discourses for spatial essence and meaning to be cleared. Accordingly, this study has tried to seek for any probability to interpret the ontology shown at any traditional space on the ground of Heidegger`s Ontological Thinking Structure which has a considerable impact on Modern Space, whose conclusions are the followings. First, Heidegger`s ontological space theory, which provided a foundation of Placeness concept, includes not only the character of interdisciplinary learning among philosophy, arts and any related studies but also that of mutual oriental and occidental cultures. Second, between the thoughts of Heidegger and Lao-tzu are considerable similarities from the methodical viewpoint that materializes the meaning of existence as an essence. Third, for a convenient interpretation, the ontological spatial concept of Lao-tzu`s philosophy shown at traditional spaces have been categorized into Typology-Incident, Morphology-situation and Topology-meaning generation with Schultz`s Existential Spatial Concept based on Heidegger`s Ontology as a medium. In particular, the meaning generation which materializes the placeness has the trait of being clarified as the product of interactions between incidents and situations.

간농양의 임상적 고찰

이옥재(Ok Jae Lee),김영채(Young Chai Kim) 대한소화기학회 1994 대한소화기학회지 Vol.26 No.3

N/A Liver abscess had been described as fatal disease before the turn of the century. There are two kinds of liver abscess, the etiology, clinical course, diagnosis, and management are different be- tween pyogenic and arnebic abscess. With the advent of antibiotics and the development of newer imaging t,echniques, marked changes in diagnosis, treatment and prognosis have been reported. In this study, a detailed review was perforrned in 74 patients treated for pyogenic or amebic liver abscess at the Gyeongsang I%ational University Hospital frorn January, 1987 through June, 1993. Among 74 cases of liver abscess, 66(89.2%) were pyogenic and 8(10.8%) amebic. The male to female ratio of liver abscess was 1.1:1 in pyogenic, 7:1 in amebic, the peak inci- dence was in the 6th decade in pyogenic and 5th, 6th decade in amebic abscess. The rnost com mon portal of entry in pyogenic abscess was biliary tract(71.2%). Liver scan, abdominal ul- trasound and CT scan was performed in 18.9%, 100%, 77% each with the each positive rate was 100%, 81.1%, and 98.2%. The most common organism of the pyogenic abscess was E. coli(46.3%). Secondary infection of amebic abscess was occurred in 1 case(12.5%). 1n the amebic abscess, antibody t.o ameba was positive in 6 cases(75%) and pus revealed chocolate brown or anchovy paste like color in 7 cases(87.5%). In the pyogenic abscess, su.'gical drain- age, percutaneous drainage or antibiotics alone was tried in 50.2%, 25.8%, 21.2% E.'ach and the each cure rate was 89.5%, 88.6% and 28.6%. The patients with amebic abscess were cured by amebicides alone(62.5%) or percutaneous aspiration(37.5%). The mortality rate of liver abscess was 12.1% in pyogenic and 0% in amebic. The factors influencing mortality in the pyogenic abscess were nonbliary origin, underlying malignancy, multiplicity of abscess, large abscess cavity(>10cm), involvement of both lobe and hypoalburninemia(K3g/dl).(Ko rean J Gastroenterol 1994; 26: 506 520)

RFID를 이용한 반도체 패키지 소자 제조 공정의 자동관리 시스템 설계

이옥재(Ok-Jae Lee) 한국통신학회 2008 韓國通信學會論文誌 Vol.33 No.8D

RFID 시스템은 전자 태그를 이용한 식별기술로서 서비스 연동이 가능하기 때문에 다양하게 연구가 진행되고 있다. 특히 RFID 시스템은 다량의 물품을 실시간으로 식별 가능하기 때문에 유통 물류 분야에서 많이 적용되고 있지만, MES(Manufacturing Execution Systems) 분야에서 적용은 미비하다. 본 논문에서는 RFID 시스템을 이용하여 반도체 패키지 소자 제조공정에서 자동 공정 관리 시스템을 설계하였다. 이를 위하여 RFID 코드체계와 태그의 논리적 메모리 구조를 분석하여, ISO/IEC 18000-6C의 UII 데이터 영역의 OID를 재구성하여 정의하였다. 또한 서버와 모바일 단말기를 통하여 각 공정을 관리할 수 있는 모바일 및 윈도우 애플리케이션을 설계하였다. RFID system, as one identification technology with using electronic tag, has been studied in the various fields for being closely connected with services. Especially, it has been applied to the field of supply chain management for identifying a lot of objects by real time, but very rarely to field of MES. In this paper, automatic management system in manufacturing process of semiconductor package elements was designed by using RFID. For this, the RFID code systems and logical memory structure of tag were analyzed, and reconstructed UII data region of ISO/IEC 18000-6C, and defined OID of UII data region. Also, a mobile and windows application were designed for being able to manage the each manufacturing process by means of server and mobile terminals.

포스터 발표 : 수질관리 ; 지표수 중 병원성미생물 분포 및 오염지표 연구

이옥재 ( Ok Jae Rhee ),조은주 ( Eun Ju Cho ),이은숙 ( Youen Sook Lee ),윤태호 ( Tae Ho Yoon ),김세철 ( Se Chul Kim ),변승헌 ( Seung Heun Byun ),류부걸 ( Bu Geol Ryu ),최선영 ( Sun Young Choi ),이목영 ( Mok Young Lee ) 대한상하수도학회 2005 공동추계 학술발표회 논문집 Vol.2005 No.-

RFID를 이용한 MES에서 웹 기반 통합 관리 시스템 설계

이옥재(Ok-Jae Lee) 한국통신학회 2009 韓國通信學會論文誌 Vol.34 No.6D

RFID 시스템은 전자 태그를 이용한 식별기술로서 서비스 연동이 가능하기 때문에 다양하게 연구가 진행되고 있다. 특히 RFID 시스템은 다량의 물품을 실시간으로 식별 가능하기 때문에 유통 물류 분야에서 많이 적용되고 있지만, MES(Manufacturing Execution Systems) 분야에서 적용은 미비하다. 본 논문에서는 RFID 시스템을 이용한 반도체 패키지 소자 제조공정의 자동 공정 관리 시스템 설계를 토대로 발주와 수주를 통합으로 관리할 수 있는 웹기반의 통합관리 시스템을 설계하였다. 이를 위하여 통합관리 시스템의 기본 시트를 정의하였고, 관련 기업간 통합관리를 위한 애플리케이션을 설계하였다. RFID system, as one identification technology with using electronic tag, has been studied in the various fields for being closely connected with services. Especially, it has been applied to the field of supply chain management for identifying a lot of objects by real time, but very rarely to field of MES. In this paper, based on an automatic management system in manufacturing process of semiconductor package elements by using RFID, integrated management system was designed for unifying the management of ordering and receiving an order. For this, the basic sheet of integrated management system was defined, and the application was designed for unifying the management of business between enterprises.

위장관 위선암의 림프절 전이의 평가에 있어서 면역조직화학적 방법의 의의

이옥재(Ok Jae Lee),정기문(Kee Moon Chung),하우송(Woo Song Ha) 대한소화기학회 2001 대한소화기학회지 Vol.37 No.5

Background/Aims: Lymph node micrometastasis could be detected by immunohistochemical staining but not by conventional H&E staining. We investigated the usefulness of immunohistochemical staining in evaluation of lymph node metastasis, and examined the role of p53 protein expression in the detection of lymph node micrometastasis. Methods: H&E staining and immunohistochemical staining using antibodies against cytokeratin and CEA were performed in 509 lymph nodes resected from 19 patients with gastric adenocarcinomas. The expression of p53 was investigated for primary tumors and 401 lymph nodes obtained from 16 patients with gastic cancer. Results: Metastasis was confirmed in 131/509 (25.7%) lymph nodes by H&E staining, in 186/509 (36.5%) by immunohistochemical staining (cytokeratin, 186; CEA, 30), and in 187/509 (36.7%) by combined analysis. Micrometastasis was identified in 56 lymph nodes (14.8%). Five of seven patients who had H&E-negative lymph nodes showed micrometastasis, and all were poorly differentiated or signet ring cell type and diffuse type of carcinoma. P53 protein was more frequently expressed in metastasis-positive nodes than negative nodes (24.3% vs. 1.2%, p<0.005). However, the expression of p53 was observed in only 7.0% of lymph nodes with micrometastasis. Conclusions: Immunohistochemical staining for cytokeratin is useful for detection of lymph node micrometastasis, especially in poorly differentiated and diffuse type adenocarcinomas. P53 expression in lymph nodes is not so useful for identification of lymph node micrometastasis. (Korean J Gastroenterol 2001;37:327-335)

서울시 급수과정별 시설에서의 수질경향

이옥재 ( Ok Jae Rhee ),이기선 ( Ki Seon Lee ),황동연 ( Dong Hyun Hwang ),이은숙 ( Eun Suk Lee ),원선정 ( Sun Jeong Won ),김상은 ( Sang Eun Kim ),임희아 ( Hui A Lim ),이경우 ( Kyung Woo Lee ),이진효 ( Jin Hyo Lee ),이목영 ( Mok You 한국물환경학회 2009 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2009 No.-

태양전지를 이용한 LED 가로등의 태양광 추적 장치 설계

이옥재(Ok-Jae Lee) 한국조명·전기설비학회 2013 조명·전기설비학회논문지 Vol.27 No.12

A standalone LED lighting system in using solar energy has been used usually less than 70W of lighting power because of a troublesome installation and maintenance. In this system, as more and more LED lighting power increases, the capacity of photovoltaic panel does proportionally, and to improve the charging efficiency of solar energy, MPPT(Maximum Power Point Tracking) techniques is used frequently, but the solar tracker is not. In this paper, a solar tracker which traces the light of the sun in varying hour to hour is studied to apply to the standalone LED lighting system. This solar tracker consists of twin axis for tracing the azimuth and altitude respectively, and it has a robust structure with safe mode to stand a strong wind. As a result of analysis, generating efficiency of the traced type has improved on the fixed one 28.84% on average.