• 현장농수산연구지
• /
• 제23권2호
• /
• pp.71-86
• /
• 2021

빅데이터 분석기술인 웹 크롤링 기술을 이용하여 네이버 뉴스 데이터 내에 담겨 있는 '한농대' 에 대한 이미지 단어를 추출하였다. 뉴스 기사에서 언급된 빈도에 따라 중요한 단어로 평가는 단어빈도 분석에서는 청년농업인을 육성하는 한농대의 특성을 잘 설명하는 '농업', '교육', '지원', '농업인', '청년', '대학', '사업', '농촌', '대표' 등의 단어가 자주 사용되는 것으로 나타났다. 또한 '디지털', '스마트', '드론', '졸업생', '창업', '새만금', '교육과정' 등 디지털 농업 전문 인재를 육성하기 위한 학교의 교육, 지원, 비전 등과 관련한 단어들이 추출되었다. 모든 기사 데이터의 단어 빈도(TF) 및 역 문서 빈도(IDF)를 이용한 TF-IDF 가중치의 전체 순위는 '농업인', '드론', '농림축산식품부', '전북', '청년농업인', '농업', '전주', '대학', '장치', '파종' 등의 단어가 한농대와 관련된 뉴스 기사에서 중요한 핵심어 역할을 하는 것으로 나타났다. 단어 빈도에서 '드론', '농림축산식품부', '전북', '청년농업인', '전주', '장치, '파종' 등은 순위가 매우 낮았으나 TF-IDF 가중치 순위에서는 한농대를 표현하는 핵심어로 나타났다. TF-IDF 평가에서 '교육', '지원', '청년', '사업', '농촌' 등의 키워드는 단어빈도가 높으면서 많은 문서에서 자주 등장하는 키워드로서 핵심어 역할은 크지 않은 것으로 나타났다. 단어 간 연계성을 파악하기 위한 의미연결망 분석에서 추출한 바이그램은 '청년'-'농업인', '디지털'-'농업', '영농'-'정착', '농업'-'농촌', '디지털'-'전환' 등의 순으로 빈도가 높게 나타났다. 중심성 지표로 키워드의 영향력을 평가한 결과 모든 지표에서 '농업'이 1위로 나타났으며, 2위에는 '농업인'(근접 중심성, 매개 중심성), '교육'(연결 중심성, 페이지랭크 중심성) 및 '미래'(고유벡터 중심성)으로 나타났다. 스피어먼 순위 상관계수에 의한 중심성 지표별 키워드의 순위의 유사성은 연결 중심성과 페이지랭크 중심성이 0.89 전후의 가장 높은 상관관계를 보였다. 이상으로 네이버 뉴스의 한농대 관련 기사에서 단어 빈도로 보면 '농업', '교육', '지원', '농업인', '청년', '대학', '사업', '농촌', '대표' 등이 중요한 단어로 평가되었으나, 문서빈도를 함께 고려한 평가에서는 '농업인', '드론', '농림축산식품부', '전북', '청년농업인', '농업', '전주', '대학', '장치', '파종' 등의 단어가 핵심어 역할을 하는 것으로 나타났다. 한편 단어나 문서의 빈도가 아니라 단어 간 네트워크 연계성을 고려한 중심성 분석에서는 연결 중심성과 페이지랭크 중심성에 의한 평가가 적합한 것으로 나타났으며, '농업', '교육', '미래', '농업인', '디지털', '지원', '활용' 등이 중심성이 강한 단어로 나타났다.

• 한국환경과학회지
• /
• 제1권2호
• /
• pp.93.2-97
• /
• 1992

The naturally occurring plasmids of Vibrio species have been isolated in part to investigate their genetic traits. Among six different Vibrio species tested, Vibrio anguillarum, Vibrio fluvialis, Vibrio vulnificus, Vibrio mimicus and Vibrio furnissi did not show any presence of plasmid. One environmental isolate of Vibrio pnrahemolyticus harboring plasmid was observed. The isolated plasmid was 8.7 kb by analysis with restriction endonuclease digestion. No common feature was shown relationships between the presence of plasmid and resistance against commonly used antibiotic compounds from the tested Vibrios. Key words . plasmid, Vibrio anguillarum, Vibrio fluvialis, Vibrio uulnincus, Vibrio mimicus, Vibrio furnissi, Vibrio parahemolyticus.

• 한국기술혁신학회:학술대회논문집
• /
• 한국기술혁신학회 2000년도 춘계학술대회
• /
• pp.141-153
• /
• 2000

Interdisciplinary research is one of the well-known key words represent the 21st century As in the developed countries, interdisciplinary research is a pervasive phenomenon in Korea. This paper intends to clear up the interdependent structure among disciplines of university researches. First, 39.9% of individual and 59.8% of collaborative research projects of university researches are interdisciplinary. Second, the interdependency among disciplines of collaborative research is more severe than that of individual research. Third, The interdependency among disciplines indicates tile importance of the balanced development in all science and engineering fields.

• 아시안잔디학회지
• /
• 제9권2호
• /
• pp.119-129
• /
• 1995

Decomposition rates of glucose, starch, spinach leaves and litters in forests are calculated by equation dC dt=-kC(Co-1nC), dC- dt=$-kC^2$, and Olson's negative exponential decay model.dC dt = - kC =-kC(Co - InC) showed a very close fit to decomposition of the organic matters in cultural media by purified microorganisms and dC dt=$-kC^2$ to decomposition of the litters in forests. Key words: Organic matters, Cultural media, Glucose, Starch, Leaves, Litters.

• 아시안잔디학회지
• /
• 제12권1호
• /
• pp.31-48
• /
• 1998

In this paper, pollen types of plants and Pb, N, P, K, Ca and Na in pallens of trees were investigated to control the air and soil pollutions. Morphological types of about 500 species of plants were identified to make the best use of paleontology, medicine and pharmacy. There were the positive correlations between Pb, N, P, K,Ca and Na contents in pollens and soils, respectively. A heavy metal, Pb, contained in pollens was not absorbed by rats. This fact should be utilized to purify air and soils polluted by Pb. Key words: Pb, Pollen, Pollution, puripication, Control.

• 아시안잔디학회지
• /
• 제10권4호
• /
• pp.331-339
• /
• 1996

The mass action on the assimilation and dissimilation of a living system from bio-molecules to bio-spheres has been demonstrated by the theoretical models as the bio- and trophic-functions From the viewpoint of this bio-mechanics, the general principle on the pre-equilibrium of the bio-molecular system is found. Key words: Mass action, Living system, Bio-molecule, Bio-sphere, Bio- and trophic function.

• 아시안잔디학회지
• /
• 제11권2호
• /
• pp.125-137
• /
• 1997

Five dictyostelid cellular slime molds were isolated from the littoral grassland ecoystems of the lake Paldangho, safeguard of waterworks, Kyounggi-do, South Korea. They were Poiysphoadylium violceum, Dictyosielium aureo-stipes var. aureo-stipes D crassicaule, D macrocephalum and D gigauteum. P. violaceum was dominant species. It live on the low nutrient and barren soils as the littoral zone destabilized in surface soils, litters and chemicals by inundation an rain precipitation. Key words: Cellular slime mold, Littoral grassland ecosystem.

• Journal of information and communication convergence engineering
• /
• 제2권3호
• /
• pp.172-176
• /
• 2004

In special effects industry there is a high demand to convincingly mimic the appearance and behavior of natural phenomena such as smoke, waterfall, rain, and fire. Particle systems are methods adequate for modeling fuzzy objects of natural phenomena. This paper presents particle system graphics library for generating special effects in video games and virtual reality applications. The library is a set of functions that allow c++ programs to simulate the dynamics of particles for special effects in interactive and non-interactive graphics applications, not for scientific simulation.

• 디지털산업정보학회논문지
• /
• 제5권2호
• /
• pp.177-184
• /
• 2009

The digital contents distribution system via network provides comfortability, usability, and diversified functions to content's users. However, for the characteristic of easy access of digital contents, the copyright infringements and indiscreet contents distribution are realized in this days. In other words, any users with the authentication key can access to copyright contents with any restrictions. To solve this problems, we proposed a user authentication mechanism which prevent indiscreet access to the digital content by using user system information. Also, to provide safe distribution of digital content, we used user's unique content authentication key.

• 한국멀티미디어학회논문지
• /
• 제23권5호
• /
• pp.658-666
• /
• 2020

PGP is an encryption software designed to provide information protection, security and authentication services for online communication systems. The characteristic of behavior done on the Internet is that you don't know the other person. It is very important to protect information from someone you cannot trust. So identification of the other person is an important task. PGP uses an digital signature algorithm to verify the identity of the other party. However, it is not accurate to check the other party's credibility. PGP increases trust as other users sign more on public keys of user. In other words, credibility is not perfect. In this paper, PGP certification system that key management in Ethereum blockchain, one of the blockchain platforms, is proposed. Key management in blockchain ensures data integrity, transparency and reliability.