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정용규(Yong-Gyu Jung),김운섭(Un-Seob Kim) 한국정보과학회 2002 한국정보과학회 학술발표논문집 Vol.29 No.1A
전자문서교환(EDI, Electronic)은 기업과 기업간에 컴퓨터와 컴퓨터의 통신을 통하여 필요한 거래문서를 구조화된 형식으로 교환하여 업무를 처리하는 방식을 말한다. 그동안 EDI 표준은 북미를 중심으로 한 ANSI X.12를 시작으로, 이에 대응되는 유럽중심의 UN/CEFACT 표준이 제정되었다. UN/CEFACT로 표준을 통합하기로 합의한 양대 표준은 또 다른 XML환경을 접하게 되었다. ISO TC154에서는 UN/CEFACT전자문서의 XML변환에 관한 논의하게 되었으나 표준으로 권고되지 못하고 있는 실정이다. 이런 표준간 연동의 문제를 위하여 본 논문에서는 Speaking Tag방식과 UN/CEFACT Tag방식의 두가지를 제안하며 각각에 대해 변환규칙을 제안한다.
심운택,이동배,조영채,이영수,윤창규 충남대학교 의과대학 지역사회의학연구소 1991 충남의대잡지 Vol.18 No.1
For the purpose to estimate the exposure levels of heavy metals and to present a basis of occupational health managements to the industrial workers exposed to heavy metals, this study conducted to know the lead and chromium levels of whole blood of industrial workers. The study population were divided into three groups to the exposure levels ; directed exposure group, indirect exposure group and non-exposure group, and the sample number of workers who exposed to lead were 80, chromium were 77, and control group were 31. The contents of lead and chromium were analyzed by atomic absorption spectrophotometer. The results were summerized as follows : 1. Sex distribution of studied group were 77.1 % in male, and 22.9 % in female. Age distribution were 74.4% in 30-49 age group. The work in years were 43.1 % in 5-10 years, 29.8% in 1-4 years. 2. Mean blood level of lead were 33.53㎍/㎗ in direct exposure, 23.84㎍/㎗ in indirect exposure group and 11.77㎍/㎗ in control group. 3. Mean blood levels of chromium were 1.9㎍/㎗ in direct exposure, 1.51㎍/㎗ in indirect groups and 0.95㎍/㎗ in control group. 4. Mean lead levels of direct exposure group was higher in male than female as 36.44㎍/㎗, 27.35㎍/㎗ respectively, but there was no difference in indirect and control group by sex. Mean chromium levels of direct exposure group were higher levels 2.26㎍/㎗ in female than 1.84㎍/㎗ in male, but there were no difference in indirect and control group by sex. 5. The age group of 29 or younger among the direct exposed had high level of lead and chromium as 35.7㎍/㎗ 2.41㎍/㎗ respectively, but that age group had no evident difference in the level of lead and chromium among the indirect exposed and non-exposed.
유기주석 노출에 의한 Mysid, Neomysis awatschensis의 독성 영향
지정훈,김상규,황운기,강주찬 한국환경독성학회 2002 환경독성보건학회지 Vol.17 No.4
Tests for the toxicity of tributyltin (TBT) were conducted on mysid collected from Dadepo beach, Pusan, Korea. The toxic effects of tributyltin on the survival, growth and oxygen consumption of the mysid, Neomysis awatschensis have been evaluated. Mysids were exposed to several concentrations of TBT (0, 0.56, 1.15, 3.07 and 6.12 ㎍/L) for 6 weeks. Survival rate was decreased with increases in concentration and exposure time and the reduction of more than 40% occurred at TBT concentration greater than 1.15 ㎍/L after 6 weeks. Growth rate was significantly decreased at concentrations greater than 1.15 ㎍/L Oxygen consumption rate was also decreased in a concentration-dependent way and significantly decreased to 39, 47 and 69% of the control at 1. 15, 3.07 and 6.12 ㎍/L, respectively. These results indicate that the contamination of aquatic environment by TBT has the potential to significantly reduce coastal and estuaries recruitment of mysid.
RFLP 법을 이용한 종에 따른 鹿茸類 한약재의 유전자 감식 연구
崔湖榮,鄭裕憲,鄭宗云,金圭烈 대한본초학회 2000 大韓本草學會誌 Vol.15 No.2
Cornu Cervi Pantoctricchum is a hairy, dried, non-ossific young horn of a stag on Cervus nippon Temminck or C. elaphus L (family Cervidae) and a popular crude drug used in Korea to reinforce the kidney-yang, to tonify the vital essence and blood, and to strengthen the bones and muscles. The present study is designed to make a DNA marker for breed identification of Cornu Cervi Pantotricshum families and later to establish a gene discrimination. In this experiment some genomic DNA were extracted fine from dried samples, most of them were extracted damaged a lot. In RFLP analysis using restriction enzyme Hinf I, Hae Ⅲ, Hha I and Msp I can be used to distinguish the breed of Cornu Cervi Pantotrichum. Therefore, these polymorphic bands by RFLP can be used in breed identification of deer and Cervi Cornu Pantoctrichum now in use.
김명호,강상수,백운규 國立 昌原大學校 産業技術硏究所 1996 産技硏論文集 Vol.10 No.-
The defect model of nonstoichiometric rutile ( TiO₂-x ) has been studied by means of the electrical conductivity measurement as function of temperature and oxygen partial pressure(Po₂). The Po₂dependence of σindicates that the major defects in rutile are doubly charged oxygen vacancies and tetravalent charged interstitial titanium ions. The interstitial titanium Ti ??'''' prevails at temperatures above 1170˚C. But the doubly charged oxygen vacancy Vo " predominates at low Po₂and temperature under 1170˚C. The proposed defect model in rutile is consistent with our previous result which was investigated by the O?? tracer diffusion.
Gyu-Un Jung,Jae-Yun Jeon,Kyung-Gyun Hwang,Chang-Joo Park 대한구강악안면외과학회 2014 대한구강악안면외과학회지 Vol.40 No.4
ectives: The purpose of this preliminary study is to evaluate the effectiveness of a customized, three-dimensional, preformed titanium mesh as a barrier membrane for peri-implant alveolar bone regeneration. Materials and Methods: Ten patients were recruited for this study. At the time of implant placement, all patients had fenestration or a dehiscence defect around the implant fixture. A mixture of particulate intraoral autologous bone and freeze-dried bone allograft was applied to the defect in a 1 : 1 volume ratio and covered by the preformed titanium mesh. A core biopsy specimen was taken from the regenerated bone four months postoperatively. Patients were followed for 12 months after the definitive prosthesis was placed. Results: Satisfactory bone regeneration with limited fibrous tissue was detected beneath the preformed titanium mesh. Histologic findings revealed that newly formed bones were well-incorporated into the allografts and connective tissue. New growth was composed of approximately 80% vital bone, 5% fibrous marrow tissue, and 15% remaining allograft. All implants were functional without any significant complications. Conclusion: The use of preformed titanium mesh may support bone regeneration by maintaining space for new bone growth through its macro-pores. This preliminary study presents the efficacy of a preformed titanium mesh as a ready-to-use barrier membrane around peri-implant alveolar bone defect. This preformed mesh is also convenient to apply and to remove.
Weight - Update - Control Adaptive Noise Canceller for speech enhancement in noisy factory
Gyu Dong Kim,Yun-jung Lee,Pil Un Kim,Jin Ho Cho,Myoung Nam Kim 대한전자공학회 2007 ITC-CSCC :International Technical Conference on Ci Vol.2007 No.7
In this paper we proposed a Weight - Update - Control Adaptive Noise Canceller which improves speech when environmental noise is stationary and it is hard to acquire a reference signal. The proposed method is based on facts that the factory noise is stationary and the noise is not changed in short conversation range. As a result of simulation using MATLAB, we confirmed that the proposed method is effective for reducing factory noise and has high signal to noise ratio (SNR).
( Un Taek Hwang ),( Junsoo Bae ),( Taekyeong Lee ),( Sung-yun Hwang ),( Jong-chan Kim ),( Jinseok Park ),( In-gyu Choi ),( Hyo Won Kwak ),( Sung-wook Hwang ),( Hwanmyeong Yeo ) 한국목재공학회 2021 목재공학 Vol.49 No.3
In this paper, we investigated the carbonization characteristics of lignin hydrochar prepared by hydrothermal carbonization and established a model for predicting the carbonization degree using near-infrared spectroscopy and partial least squares regression. The carbon content of the hydrothermally carbonized lignin at the temperature of 200 ℃ was higher by approximately 3 wt% than that of the untreated sample, and the carbon content tended to gradually increase as the heating time increased. Hydrothermal carbonization made lignin more carbon-intensive and more homogeneous by eliminating the microparticles. The discriminant and predictive models using near-infrared spectroscopy and partial least squares regression approppriately determined whether hydrothermal carbonization has been applied and predicted the carbon content of hydrothermal carbonized lignin with high accuracy. In this study, we confirmed that we can quickly and nondestructively predict the carbonization characteristics of lignin hydrochar manufactured by hydrothermal carbonization using a partial least squares regression model combined with near-infrared spectroscopy. 본 논문에서는 열수 탄화(hydrothermal carbonization)에 의해 제조된 리그닌 하이드로차의 탄화 특성을 조사하였고, 근적외선 분광법과 부분 최소 제곱(partial least squares) 회귀를 이용하여 탄화 거동을 예측하기 위한 모델을 수립하였다. 온도 200℃에서 열수 탄화된 리그닌의 탄소 함량은 무처리 시료 보다 약 3 wt% 높았으며 가열 시간이 증가할수록 탄소 함량도 서서히 증가하는 경향이 나타났다. 열수 탄화는 리그닌을 더욱 탄소 집약적으로 변화시키고 마이크로 파티클을 제거하여 더욱 균질한 특성을 부여하였다. 근적외선 분광법과 부분 최소 제곱 회귀를 이용한 판별 및 예측 모델은 수열 탄화의 적용 여부를 완벽히 구분했으며 높은 정확도로 열수 탄화 리그닌의 탄소 함량을 예측하였다. 본 연구로부터 근적외선 분광법과 결합된 부분 최소 제곱 회귀 모델을 이용하여 열수 탄화에 의해 제조된 리그닌 하이드로차의 탄화 특성을 빠르고 비파괴적으로 예측할 수 있다는 것이 확인되었다.
Improvement of fibrosed scar tissue elongation using self-inflatable expander
Gyu-Un Jung,Jin-Woo Kim,Eun-Kyoung Pang,Sun-Jong Kim 대한치과의사협회 2016 대한치과의사협회지 Vol.54 No.7
We evaluated a self-inflatable osmotic tissue expander for its utility in creating sufficient soft tissue elongation for primary closure after bone grafting. Six patients with alveolar defects who required vertical augmentation of >6 mm before implant placement were enrolled. All had more than three prior surgeries, and flap advancement for primary coverage was restricted by severely fibrosed scars. Expanders were inserted beneath the flap and fixed with a screw. After 4 weeks, expander removal and bone grafting were performed simultaneously. A vertical block autograft and guided bone regeneration and distraction osteogenesis were performed. Expansion was sufficient to cover the grafted area without additional periosteal incision. Complications included mucosal perforation and displacement of the expander. All augmentation procedures healed uneventfully and the osseous implants were successfully placed. The tissue expander may facilitate primary closure by increasing soft tissue volume. In our experience, this device is effective, rapid, and minimally invasive, especially in fibrous scar tissue.