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이연구(Yeon-Koo Lee),송정호(Jung-Ho Song),이호석(Ho-Suk Lee) 한국정보과학회 1998 한국정보과학회 학술발표논문집 Vol.25 No.2Ⅰ
대학 행정의 전산화 프로젝트는 여러 부분에서 진행되어 왔다. 본 논문은 학사 행정 업무에 관한 프로토타입으로 사용될 목적으로 개발되었으며, 웹에 대학 지원 경쟁률을 실시간으로 사용자에게 보여지도록 했다. 개발 환경은 Unix 운영체제에 오라클 데이터 베이스가 기반이며 호스트 언어로 Pro*C를 사용하였다. 구현 원리는 TCP/IP 프로토콜을 거치지 않고 웹 서버를 이용하여 웹 상에 데이터베이스의 데이터를 주기적으로 갱신하여 보여준다는 점이 특색이다.
이연구(Y G Lee),노준규(J K Loh),이창걸(C G Lee),이종영(J Y Lee),김귀언(G E Kim),서창옥(C O Suh),홍원표(W P Houng) 대한두경부종양학회 1988 대한두경부 종양학회지 Vol.4 No.1
Radiation therapy is generally considered to be the treatment of choice in T₁ glottic cancer, maninly because of preservation of voice function and its local control rate is comparable to that of surgery. Failures from radiation therapy can be ultimately salvaged by surgery. A retrospective analysis of the treatment of 25 patients with T₁ glottic cancer seen at the Y onsei Cancer Center from 1980 to 1984 is presented. Radiation dose to the target volume varied from 6400 to 7000 cGy in 6-7 weeks. The local control rate is 84%. Four patients had primary failure and three of these patients had salvage surgery. Of the 3 patients who had salvage surgery, 2 were cured and aonther one was died with progression of the disease. 5-year acturial and disease free survival rate are 91.1%, 78.0% respectively.
원유내(原乳內) 체세포수(體細胞數) 측정(測定)을 위한 Fossomatic과 Coulter Counter 방법(方法)의 비교(比較)
이연구 ( Chung Goo Lee ),손봉환 ( Bong Whan Sohn ),이정길 ( Chung Gil Lee ),고홍범 ( Hong Bum Koh ) 한국가축위생학회 1993 韓國家畜衛生學會誌 Vol.16 No.1
Samples of bulk herd milk, foremilk, last milk(stripping) and individual cow sample were collected and their somatic cell number were counted with Fossomatic counter(FCC), Coulter counter(CC), direct microscopic somatic cell count(DMSCC) and Califormia mastitis test(CMT). The results were compared and summarized as fallows: 1. Mean somatic cell counts of 120 bulk herd milk samples obtained by DMSCC, FCC and CC were 433,203, 481,213 and 676,245 respectively. 2. Mean somatic cell counts of 116 foremilk samples obtained by DMSCC, FCC and CC were 515,035, 611,845 and 725,051 respectively. 3. Mean somatic cell counts of 87 last milk samples obtained by DMSCC, FCC and CC were 718,506,839,874 and 1,041,160respectively. 4. Mean somatic cell counts of 57 individual cow samples obtained by DMSCC, FCC and CC were 449,258, 491,018 and 621,315 respectively. 5. Mean somatic cell counts of all samples increased with the increasing CMT score, and the cell counts were higher by CC than by FCC. 6. The correlation coefficients between the somatic cell counts by CMT and CC were 0.926 in bulk herd milk, 0.707 in foremilk 0.688 in last milk and 0.675 in individual cow sample, respectively. 7. The correlation coefficients between the somatic cell conuts by CMT and FCC were 0.945 in bulk herd milk, 0.705 in foremilk 0.694 in last milk and 0.727 in individual cow sample, respectively. 8. The correlation coefficients between the somatic cell conuts by CC and FCC were 0.978 in bulk herd milk, 0.997 in foremilk 0.983 in last milk and 0.986 in individual cow sample, respectively.
이연구(Youn Goo Lee),안기정(Ki Jung Ahn),서창옥(Chang Ok Suh, 김귀언(Gwi Eon Kim),노준규(John J.K. Lohn),안희정(Hee Jung Ahn),최인준(In Joon Choi),김병수(Byung Soo Kim) 대한방사선종양학회 1989 Radiation Oncology Journal Vol.7 No.2
Rhabdomyosarcoma is a highly malignant soft tissue sarcoma that can arise in any site of the body containing striated muscle of its mesenchymal analgae. It is the most common childhood sarcoma with two peak age frequencies, one at ages 2 to 6, and one in the adolescence. The site, stage and extent of disease, and pathologic characteristics of the tumor contribute to prognostic factors that influence therapeutic decisions. The results of treatment of 52 patients with rdomyosarcoma, who were treated at Department of Radiation Oncology, Yonsei University College of Medicine, Yosei Cancer Center from 1976 to 1987 were retrospectively analyzed. The most frequent clinical group and primary sites were IRS group III(57.7%) and head and neck (42.3%) including orbit (11.5%) and parameningeal region (13.5%). The overall and disease free 5 year survival rate of eligible 41 patients were 31.7%, 29.3%, respectively. The complete remission (CR) rate was 50% in clinical group III and 0% in IV. Primary tumors of the orbit, clinical group I and embryonal subtype had the best prognosis. The survival rate was improved by addition of chemotherapy to operation and radiation therapy.
신동철,양은지,이연구,박철휘 대한환경공학회 2018 대한환경공학회지 Vol.40 No.2
In this study, evaluation of sludge reduction and advanced treatment were performed using the batch test. Sludge reduction rate was checked by batch experiment on excess sludge and aerobic sludge. The maximum sludge reduction rate was 37% for excess sludge and 34% for aerobic sludge. As a result of the batch process, the SCODCr 26%, S-N 62% and S-P 82% were removed. Therefore, it is possible to reduce the amount of sludge during the microbial catalyst injection and to remove the organic matter and nutrients simultaneously. In particular, the removal efficiency of S-P is higher than that of the conventional treatment. Especially, the removal efficiency of S-P was higher than that of conventional A2O treatment. In order to evaluate sludge reduction ability after microbial catalytic agent injection, the yield of heterotrophic biomass (YH), decay coefficient of heterotrophic biomass (bH) and observed or net biomass yield (Yobs) were estimated. The yield of YH was 0.32 and 0.25, which was less than 50% of the YH (BOD based) value of general heterotrophic microorganisms. On the other hand, bH was 0.232 day-1, which is a general value. Therefore, it is considered that the main factor of sludge reduction using microbial agent is due to the decrease of biomass build-up rather than the death of sludge microorganisms. 본 연구는 batch-test를 통해 미생물 촉매제의 적정 주입량을 산정하고 슬러지 감량화에 대하여 검토하였다. 잉여슬러지와 호기조 슬러지를 대상으로 batch 실험을 통해 슬러지 감량화율을 확인하였으며 잉여슬러지는 최대 37%, 호기조 슬러지최대 34%의 슬러지 감량화율을 나타내었다. Batch test를 통하여 고도처리 효율을 산정한 결과 SCODCr 26%, S-N 62%, S-P 82% 제거되었다. 따라서 미생물 촉매제 주입 시 슬러지 감량화가 가능하고 유기물 및 영양염류의 동시제거가 가능한 것으로나타났으며 특히 S-P의 경우 기존 처리공정의 인 제거효율보다 높은 제거효율을 보였다. 미생물 촉매제 주입 이후 슬러지감량능을 평가하기 위하여 종속영양미생물 생산계수(YH), 종속영양미생물 사멸계수(bH), 미생물 생산계수(Yobs)의 산정을 통해 분석하였다. YH 산정결과 0.32, 0.25으로 나타났으며 일반적인 종속영양미생물의 YH (BOD based) 값의 50% 이하의 값을보였다. 반면에 bH는 0.232 day-1로 일반적인 수치를 보여 미생물 촉매제를 이용한 슬러지 감량의 주 요인은 슬러지 미생물의사멸이 아닌 증식 저하에 따른 것이라 판단된다.