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함영국,강민석,정홍규,박래홍,박귀태 대한전자공학회 1994 전자공학회논문지-B Vol.b31 No.4
This paper presents recognition of raised alphanumeric markings on rubber tires for their automatic classification. Raised alphanumeric markings on rubber tires have different characteristics as compared to those of printed characters. In the preprocessing step, we first determine the rotation angle using the Hough transform and align markings, then separate each character using vertical and horizontal projections. In the recognition step, we use several features such as width of a character, cross point, partial projection, and distance feature to recognize characters hierarchically. The computer simulation result shows that the proposed system can be successfully applied to the industrial automation of rubber tires classification.
저농도의 Microcystin-LR를 단기간 처리한 흰쥐에서 투여방법에 따른 독성 지표의 변화
함영국,김성완 한국환경독성학회 2003 환경독성보건학회지 Vol.18 No.3
To investigate the effects of low dosed microcystin-LR(MCLR) on the initial stage of subacute hepatotoxicity in vivo, male Sprague-Dawley rats after weanling were divided in four groups. The orally treated group(OG) was administered orally by 1㎍/kg B.W. at an interval of three days. The free group(FG) has taken the drinking water including 1㎍/L freely and the control group (CG) was only treated with 0.9% saline solution. All groups were treated for a period of 3 weeks. There was a significant correlation in body growth rate between OG and FG and especially, a deterioration of the growth of spleen was observed in the FG after 5 days. The protein levels were also decreased in OG and FG after 9 days. Level of total fat was increased to the 9th day but again decreased up to the initial level. High hemolysis of the isoiated erythrocytes occurred only in OG. Activities of γ-GT of OG and FG were higher twice-fold than CG, but the values of OG were already higher at the first treatment day. No significant change in aspartate aminotransferase(AST) activity was shown in all groups, but the activity of alanine aminotransferase(ALT) was slightly increased at the beginning state. There were much similarities in the results of OG and FG, except the growth inhibition of spleen in FG. It may be concluded that long-term effects of the low doses of mycrocystins in animals including human being can lead to serious health problems, especially to liver and spleen.
함영국,김영환,신석철 한국경영과학회 1998 한국경영과학회 학술대회논문집 Vol.- No.2
본 연구에서는 위성영상 및 항공영상을 이용하여 여러 가지 정보를 추출하였다. 시간적으로 차이가 있는 Landsat TM(Thematic Mapper) 영상과 항공영상을 이용하여 변화 지역을 검출하였다. 변화지역 검출시 각 연도별로 비교사 알고리듬인 ISODATA를 이용하여 영상 분류를 행한 후, 분류 결과를 이용하여 지형이 변화된 지역을 추출함으로써 지형변화 추출 결과의 정확도를 높일 수 있었다. 또한 부화소(sub-pixel) 개념을 도입하여 비접근 지역의 도로망과 경작지역에 대한 피복 분류를 행하였다. 본 연구에서 사용한 알고리듬이 비접근 지역에 대한 지형정보 분석에 유용함을 알 수 있었다. In this study, we several terrain information using satellite and aerial images. We detected change of terrain using Landsat Thematic Mapper(TM) and aerial images which are multitemporal data. In change detection processing, we first classified satellite images by ISODATA algorithm which is an unsupervised learning algorithm, then performed change detection. By this method, we could obtain good result. Also we introduce sub-pixel concept to classify road and agriculture area in inaccessible area. In summary, in chang detection processing, we can find that the used method is efficient.
DMBA 와 TPA 에 의해 유발되는 암 발생과정에서의 PKC 활성과 몇 가지 항산화 지표에 대한 비타민 A 와 E 의 영향
함영국,최면,김성완 ( Young Kook Ham,Myeon Choe,Sung Wan Kim ) 생화학분자생물학회 1990 BMB Reports Vol.23 No.4
Recombinant human interferon-β was purified to homogeneity from E. coli by methods of sonication, extraction with 8 M Guanidine HCl, solubilization of inclusion body, dilution, Blue Sepharose CL-6B column chromatography and HPLC gel filtration. Specific activity of purified IFN-β was 3.1×10^8 IU/㎎ protein and the purification was 1,902 fold. The purified IFN-β was a single band on SDS polyacrylamide gel electrophoresis under reducing condition and non-reducing condition and its molecular weight was estimated to 18,000 dalton. The results of N-terminal analysis showed that recombinant human IFN-β has N-terminal methionine same as natural human IFN-β. The inclusion bodies were observed in the E. coli cells harboring IFN-β gene but not observed in the host cells (MM 294). The purity of finally purified IFN-β was more than 99% by HPLC gel filtration.
함영국,오세종,김성완 한국분석과학회 2004 분석과학 Vol.17 No.5
This study was examined occurrence of bisphenol A (BPA) and nonylphenol (NP) in waterworks system of Seoul, Korea from September 2002 to December 2003. The levels of BPA and NP in Han-river and its tributaries were as followed: Paldang-dam, ND(not detected)~0.033 ㎍/L and ND~0.823 ㎍/L; Kyungahn-creek, ND~0.659 ㎍/L and ND~3.827 ㎍/L; Whangsuk-creek, ND~0.528 ㎍/L and ND~12.724 ㎍/L, respectively. In water of 6 intake-station, the contents of NP and BPA were detected 0.122~2.724 ㎍/L, and ND~0.260 ㎍/L, respectively. In the finished- and tap-water of three drinking water treatment plants (DWTPs) around Whangsuk-creek, BPA was not detected in all samples, while NP was in ppt levels in whole. Through the process of DWTP, also, the removal ratio of NP was above 80% in all this. Therefore, this result was suggested that levels of BPA and NP in waterworkssystem depended on non-point contaminants and swage treatment plants in the Han-river shed.
함영국,김인권,정홍규,박래홍,이창범,김상중,윤병남 대한전자공학회 1994 전자공학회논문지-B Vol.b31 No.7
In this paper, an efficient algorithm is proposed which recognizes the mixed document consisting of the printed Korean/alphanumeric texts and graphic images. In the preprocessing step an input document is aligned if necessary by rotating it. We obtain the rotation angle using the Hough transform and align the input document horizontally. Then we separate graphic image parts from text parts by considering chain codes of connected components. We further separate each character using vertical and horizontal projections. In the recognition step Korean and alphanumeric characters are classified and each of them is recognized hierarchically using several features. In summary an efficient recognition algorithm for mixed documents is proposed and its performance is demonstrated via computer simulations.