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정광용,정연준,김찬영,양두현,김재천,Jung, Kwang-Yong,Jeong, Yeon-Jun,Kim, Chan-Young,Yang, Doo-Hyun,Kim, Jae-Chun 대한소아외과학회 2004 소아외과 Vol.10 No.1
A total of 30 cases of the peptic ulcer in children, who underwent operations from January 1981 to December 1995 because of complications at Department of the Surgery, Chonbuk National University Medical School, is reviewed. Twenty-three were males (76.7%), 7 females (23.3%) and male was preponderant at 3.3:1. There were 25 cases (83.3%) age 10 to 15 years, 3(10.0%) between 2 and 9 years, and 2 (6.7%) below 2. The ulcer was located at duodenum in 27(90.0%), and at stomach in 3 cases (10.0%). Complications were perforation in 19 cases (63.3%), pyloric obstruction in 9 (30.0%) and bleeding in 2 (6.7%). For perforation, truncal vagotomy with pyloroplasty was done in 11 cases, truncal vagotomy with hemigastrectomy and gastrojejunostomy in 6, and simple closure in 2 cases. For obstruction, truncal vagotomy with hemigastrectomy and gastrojejunostomy was done in 5, and truncal vagotomy and pyloroplasty in 3 cases. For bleeding lesions, truncal vagotomy and pyloroplasty was performed in 2 cases. Ten postoperative complications developed in 9 patients: adhesive ileus in 5, recurrence in 2, pneumonia 2, and wound seroma 1 case. One patient developed a primary duodenal perforation and another a recurrent obstruction. Both of patients had symptoms for more than 3 years and were treated with truncal vagotomy and pyloroplasty for the primary operations. Hospital stay was 11.5 days for the patient with perforated ulcer, 11.0 days for the patient with pyloric obstruction, and 14.5 days for the child with bleeding. Average hospital period was 11.6 days. To reduce recurrences after operation, extensive procedure such as distal gastrectomy with vagotomy at the first operation should be considered in case with severe complication or with patients who have been symptomatic for long periods.
오창 학소리유적 토광묘내 유리구슬의 화학적 특성 - 37호 및 40호 -
정광용,강형태,고민정,김화정,Chung, Kwang Yong,Kang, Hyung Tae,Koh, Min Jeong,Kim, Hwa Jung 국립문화재연구소 2011 保存科學硏究 Vol.32 No.-
오창 학소리I유적의 토광묘에서 유리구슬 시료 4점을 입수하고 각각 13종의 산화물을 분석하였다. 토광묘에서 출토된 유리구슬의 화학조성에 따른 유리 계통을 정리하였고 어떤 발색제가 기여하였는지를 확인하였으며 구슬을 제조하기 위한 원료의 대해서도 검토하였다. 토광묘에서 녹청색 유리 4점은 모두 $K_2O-CaOSiO_2$ 계통이며 동일한 농도범위이어서 같은 원료를 사용했을 것으로 판단되며, 이중 3점은 PbO 함량이 4% 이상으로서 포타쉬납유리 계통($K_2O-PbO-CaO-SiO_2$)으로 볼 수 있다. 유리의 녹청색은 Cu에 의한 것으로 생각되며 일부 철의 역할도 있었을 것이다. 납동위원소비 분포는 모두 흩어져있어 동일 지역에서 가져온 납을 사용했다고 볼 수 없다. Four glass beads from Hakso-ri site, O'chang were analyzed for thirteen oxides with SEM/EDS and lead isotope ratios with TIMS respectively. These samples were classified to potash glass system($K_2O-CaO-SiO_2$) with HCLA(High CaO, Low $Al_2O_3$). However three samples with above 4% for lead could be classified to potash-lead ($K_2O-PbO-CaO-SiO_2$)glass system and it seemed that coloring agent for greenish blue was Cu. Lead isotope ratio data for four samples did not make a group but scattered to the space respectively. It needs more study for compositions and lead iosotope data of potash-lead glasses with regions and ages.
위상 배열 다기능 레이더의 탄도탄 츠적 필터 성능 분석
정광용(Kwang-Yong Jung) 한국전자파학회 2012 한국전자파학회논문지 Vol.23 No.8
본 논문에서는 다기능 레이더를 이용한 탄도탄 추적을 위해 알파-베타 필터, 칼만 필터, 탄도탄 추적 필터의 성능을 분석하였다. 제시된 필터들은 탄도탄의 궤적과 다기능 레이더의 신호처리를 모의하는 시뮬레이터를 기반으로 시뮬레이션 되었다. 그 결과, 제안한 탄도탄 추적 필터의 성능이 알파-베타 필터에 비해 최대 75.3%의 속도 오차 감소 효과가 있음을 확인하였다. 또한, 추적 초기화 이후에 제안한 필터가 칼만 필터보다 거리, 속도오차가 작아 안정적인 성능을 보였다. 마지막으로 각도 추적에서도 전체 시나리오 구간에서 안정적인 동작을 확인하여 초고속 탄도탄 표적의 추적에 적합함을 입증하였다. This paper compares the performance of several tracking filters, namely, alpha-beta filter, Kalman filter and TBM tracking filter for ballistic target tracking problem using multi-function radar. Every of three tracking filters suggested was tested on simulator developed in accordance with TBM trajectory and MFR RSP measurement. The result shows the method using TBM tracking filter gives 75.3 % decreased velocity RMS error than alpha-beta filter. After initialization, the RMS error of range and velocity of the proposed filter is also smaller than the Kalman filter. Finally the proposed filter is suitable for high-speed TBM tracking due to the stable angle tracking accuracy.
고층 사무소 건축의 외부형태에 나타난 조형적 장식 표현에 관한 연구 -1980년 이후 국내 사례를 중심으로-
정광용(Kwang-Yong Jung) 한국산업융합학회 2002 한국산업융합학회 논문집 Vol.5 No.4
The focus of this study is that spacial, material, functional, cubical reasons are visually expressed on high-rise office Architecture in Korea according to the period of their completion. Office buildings are analyzed in three of exterior composition : Lower, Middle, Top part of the Building, Comparing the whole composition of the Building, forty-five types of compositions are extracted ; expression of formal, material, structural, functional Decoration which show the tendencies of Korean office buildings.