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수상함 전투체계 육상시험체계용 개체생성기 구현에 적합한 병렬처리기법에 관한 연구
김창진,오광백,정용환,Kim, Chang-Jin,Oh, Gwang-Baek,Jung, Young-Hwan 한국군사과학기술학회 2010 한국군사과학기술학회지 Vol.13 No.5
Object Generator is a software to provide simulation object data(aircraft, ship, submarine, missile, torpedo) for sumulators in LBTS(Land Based Test System). but there is a burden to the system, because Object generator needs to send many object's data, display objects in a tactical screen, show object's information in a list in 1 second. This paper suggests a parallel software structure taking a few factors(deadlock, dependency) into consideration. At last, the paper shows the performance of the parallel structure's software compared with the former structure's software.
Scanning Hall probe를 이용한 coated conductor의 field profile 측정과 current profile 계산
유재은,이상무,정예현,이재영,정용환,염도준,김호섭,하홍수,오상수,Yoo, Jae-Un,Lee, Sang-Moo,Jung, Ye-Hyun,Lee, Jae-Young,Jung, Yong-Hwan,Youm, Do-Jun,Kim, Ho-Sup,Ha, Hong-Soo,Oh, Sang-Soo 한국초전도학회 2007 Progress in superconductivity Vol.8 No.2
We measured the field profiles, H(x)'s of coated conductors by using scanning Hall probe method when various magnetic fields, $H{_\alpha}'s$ or currents, I's were applied. From the measured field profiles, we calculated the current profiles, J(x)'s by the inversion method. The calculated J(x)'s of coated conductors show some different properties from the standard critical state model. $J{_c}'s$ are inhomogeneous varying with the positions and are not constant when $H_{\alpha}$ or I changes. And when I decreases the features of current reversion are remarkably different from the model.
김성태(Seong Tae Kim),정영섭(Young Sub Jung),이동규(Dong Kyu Lee),신봉식(Bong Sik Shin),정용환(Yong Hwan Jung),이효진(Hyo Jin Lee) 대한산부인과학회 2001 Obstetrics & Gynecology Science Vol.44 No.4
Intravenous leiomyomatosis is an uncommon uterine tumor characterized by the growth of histologically benign smooth muscle initially into venous channels within the broad ligament, intrauterine, and iliac vein, and can extend to inferior vena cava, and right side of the heart. Intravenous leiomyomatosis is always grossly visible as worm-like plugs within the involved vessels. A 41-year-old woman presented with lower abdominal mass, and she had undergone total abdominal hysterectomy and left salpingoophorectomy for leiomyoma of uterus. On pathological examination it was diagnosed as intravenous leiomyomatosis. 16 month later, She was admitted with lower abdominal mass on retroperitoneal cavity. The patient was successfully treated by resection of recurred mass and right salpingoophorectomy. A case of recurrent intravenous leiomyomatosis is presented with a brief review of literatures.
김성철,송은영,김공호,권혁모,강상헌,박기훈,정용환,장기창,Kim, Seong-Cheol,Song, Eun-Young,Kim, Kong-Ho,Kwon, Hyeog-Mo,Kang, Sang-Heon,Park, Ki-Hun,Jung, Yong-Hwan,Jang, Ki-Chang 한국응용생명화학회 2003 한국농화학회지 Vol.46 No.3
양하(Zingiber mioga Roscoe) 근경의 에탄을 추출물을 재료로 Staphylococcus aureus, Bacillus subtilis 및 B. cereus에 대한 activity-guided fractionation을 실시하여 항균성 물질 세가지준 얻었다. 항균력실험 결과, 화합물 I과 111은 세가지균주 모두에 활성이 있었고, 화합물 II에서는 B. subtilis과 B. cereus에서만 활성이 나타났다. 그 중에서 가장 활성이 강한 화합물 I을 Bioscreen C로 optical density(600 nm)를 측정하여 증식억제실험을 한 결과 10 ppm 처리시 B. subtilis과 B. cereus에서 72시간동안 강한 증식억제효과를 나타내었으며, S. aureus에서는 25 ppm 처리시 72시간동안 완전증식억제효과를 나타내었다. $1^H-NMR$, ${13}^C-NMR$, DEPT,$1^H-1^H$ COSY, HMQC, HMBC 및 IR 스펙트럼 등을 분석한 결과 화합물 I, II, III은 labdane-type diterpene인 $(E)-8{\beta}(17)-epoxylabd-12-ene-15,16-dial(C_{20}H_{30}O_3,\;MW=318)$, $galanolactone(C_{20}H_{30}O_3,\;MW=318)$ 그리고 galanal A($C_{20}H_{30}O_3,\;MW=318$)로 각각 동정되었으며, 이들은 양하의 근경에서는 처음 분리된 것이다. In order to isolate antibacterial substances from the rhizome of Zingiber mioga Roscoe, the ethanol extracts was fractionated according to the activity against Bacillus subtilis, B. cereus and Staphylococcus aureus. Three antibacterial substances were isolated and purified by column chromatography and recrystallization. Compounds I and III showed activity against all the tested bacterias and compound II exhibited the activity against B. subtilis and B. cereus S. aureus. Compound I was examined antimicrobial activity against B. subtilis, B. cereus and S. aureus by optical density using Bioscreen C. Compound I showed strong growth inhibition at 10 ppm on B. subtilis and B. cereus for 72 hrs, and at 25 ppm on S. aureus. On the basis of spectrometric studies including $1^H-NMR$, ${13}^C-NMR$, DEPT, IH-lH COSY, HMQC, HMBC and IR, compounds I, II and III were identified as $(E)-8{\beta}(17)-epoxylabd-12-ene-15,16-dial\;(C_{20}H_{30}O_3,\;MW=318)$, galanolactone $(C_{20}H_{30}O_3\;MW=318)$ and galanal A $(C_{20}H_{30}O_3,\;MW=318)$, respectively. These results are the first reports on the isolation of $(E)-8{\beta}(17)-epoxylabd-12-ene-15,16-dial, galanolactone and galanal A from the rhizome of Zingiber mioga.