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데이터마이닝 기법을 이용한 문헌정보학 전문용어 클러스터링 모델의 데이터베이스 설계에 관한 연구
황정민,박미영,승현우 서울여자대학교 자연과학연구소 2002 자연과학연구논문집 Vol.14 No.-
Data mining, a relatively new technique which has been evolved from the field of the computer and information science, involves searching for patterns in data. Similarly, text mining involves searching for patterns in text. It may be defined as the process of analyzing text to extract information useful for a particular purpose. Text is relatively unstructured, amorphous and difficult to deal with, compared with other types of data stored in databases. The number of terminologies extracted from unstructured text documents is irregular and the terminologies themselves are general in nature, making it difficult to retrieve useful information as efficiently as using algorithms searching for general association rules. In this paper, we propose a database design method for the terminology clustering model in which a datamining technique is used in order to extract useful information from large documents. The proposed method can be used in various areas including automatic document classification and intelligent search engines.
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Anti-oxidant and Anti-inflammatory Properties of Methanol Extracts from Various Crops
황정민,최기춘,방성준,손영옥,김범태,Dong-Hern Kim,최기준,김다혜,Xianglin Shi,이정채 한국식품과학회 2013 Food Science and Biotechnology Vol.22 No.suppl1
Corn, sorghum, barley, Italian ryegrass (IRG),and alfalfa have long been used in human and/or animal diets. While their nutritional information is widely available,their potentials for anti-oxidation, anti-inflammation, and anti-tumor are barely explored. In the present study, several serial extracts were prepared from 70% methanol extracts of these forage crops and their bioactive potentials were investigated using cell-free and cell-mediated experimental systems. Chloroform extracts in this study generally showed stronger activity to scavenge hydroxyl radicals and superoxide anions than butanol or water extracts. IRG and sorghum chloroform extracts especially almost completely suppressed the lipopolysaccharide-mediated production of nitric oxide,tumor-necrosis factor-α, and interleukin-6. These extracts also inhibited dramatically the viability and DNA synthesis of human skin dermatofibrosarcoma cells without a toxic effect on primary cultured control cells. These beneficial effects appeared to be associated with the amount of flavonoids contained in the extracts.
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