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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.
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.
ETC 적용을 통한 천연가스/디젤 혼소엔진 배출가스 특성에 관한 연구
이옥재(OkJae Lee),이상민(Sangmin Lee),심주현(Juhyen Sim),곽용환(Yongwhan Kwak),이창언(Changeun Lee),양순용(Soonyoung Yang) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
In this study, 3.4L mechanical controlled diesel engine is converted into Natural Gas / CRDi dual fuel engine and investigated the emission characteristics of the engine according to restrict air flow by ETC to suppress the performance degradation of emissions due to lean combustion characteristics of the dual fuel engine based on diesel engine(by KC1-8 Mode). As the result, fuel consumption is significant reduction in low load area. THC, CH₄, CO emissions were reduced and PM emissions rapidly decreased to 7.42×10<SUP>-7</SUP> g / kWh from 1.4×10<SUP>-4</SUP> g / kWh. NOx emission increased to 3.12 g / kWh from 2.65 g / kWh, but can be improved through optimization of the ETC.
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)
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.
이옥재(Ok Jae Lee),심정우(Jung Woo Shim),김현진(Hyun Jeen Kim),김기홍(Kee Hong Kim),정기문(Kee Moon Chung) 대한소화기학회 1997 대한소화기학회지 Vol.30 No.2
Although primary angiosarcoma of the liver is a rare malignant tumor, it is the object of interest because of an association with specific carcinogen such as thorium dioxide, arsenic and vinyl chloride. We present here a case of primary angiosarcoma of the liver found in farmer. A 72-years old man was presented with right upper quadrant abdominal pain. Abdominal ultrasonography and CT scan revealed a mass in the left lobe of the liver and histologic diagnosis of angiosarcoma was made by percutaneous needle biopsy. Follow-up ultrasonography performeci at 8 weeks after discharge against advice increased size of the tumor. (Korean J Gastroenterol 1997; 30: 262-267)