연구보문 : 환경미생물 ; 미생물혼합제제 처리가 토양의 미생물상과 화학적 특성 및 시설 채소 생육에 미치는 영향

류일환 ( Il Hwan Ryu ),정수지 ( Su Ji Jeong ),한성수 ( Seong Soo Han ) 한국환경농학회 2012 한국환경농학회지 Vol.31 No.4

BACKGROUND: The urgency of feeding the world`s growing population while combating soil pollution, salinization and desertification requires suitable biotechnology not only to improve crop productivity but also to improve soil health through interactions of soil nutrient and soil microorganism. Interest in the utilization of microbial fertilizer has increased. A principle of nature farming is to produce abundant and healthy crops without using chemical fertilizer and pesticides, and without interrupting the natural ecosystem. Beneficial microorganisms may provide supplemental nutrients in the soil, promote crop growth, and enhance plant resistance against pathogenic microorganisms. We mixed beneficial microorganisms such as Bacillus sp. Han-5 with anti-fungal activities, Trichoderma harziaum, Trichoderma longibrachiatum with organic material degrading activity, Actinomycetes bovis with antibiotic production and Pseudomonas sp. with nitrogen fixation. This study was carried out to investigate the mixtures on the soil microflora and soil chemical properties and the effect on the growth of lettuce and cucumber under greenhouse conditions. METHODS AND RESULTS: The microbial mixtures were used with each of organic fertilizer, swine manure and organic+swine manure and compared in regard to changes in soil chemical properties, soil microflora properties and crop growth. At 50 days after the treatment of microorganism mixtures, the pH improved from 5.8 to 6.3, and the EC, NO3-Na and K decreased by 52.4%, 60.5% and 29.3%, respectively. The available P2O5 and SiO2 increased by 25.9% and 21.2%, respectively. Otherwise, the population density of fluorescent Pseudomonas sp. was accelerated and the growth of vegetables increased. Moreover, the population density of E. coli and Fusarium sp., decreased remarkably. The ratio of bacteria to fungi (B/F) and the ratio of Actinomycetes bovis to fungi (A/F) increased 2.3 (from 272.2 to 624.4) and 1.7 times (from 38.3 to 64), respectively. Furthermore, the growth and yield of cucumber and lettuce significantly increased by the treatment of microorganism mixtures. CONCLUSION(S): These results suggest that the treatment of microorganism mixtures improved the chemical properties and the microflora of soil and the crop growth. Therefore, it is concluded that the microorganism mixtures could be good alternative soil amendments to restore soil nutrients and soil microflora.

Pyrazole계 제초제 및 그 혼합제의 살초력 비교연구

한성수(Seong Soo Han),노석초(Seog Cho Lo),임방현(Bang Hyun Lim),임요섭(Yo Sup Lim) 원광대학교 생명자원과학연구소 1999 생명자원과학연구 Vol.21 No.-

재취업 교육생의 IT융합창업교육이 자기효능감에 미치는 영향

한성수(Seong-Soo Han) 인문사회과학기술융합학회 2018 예술인문사회융합멀티미디어논문지 Vol.8 No.10

최근 IT 기술과 다양한 분야의 융합을 통한 IT융합기술이 산업 전 분야에서 타나고 있다. 또한 교육 분야에서도 IT기술을 접목한 IT융합창업교육이 실시되고 있다. 이러한 IT융합기술은 컴퓨팅 사고력을 바탕으로 문제 해결 능력을 배양하여 IT창업교육의 효과를 높이고 있다. 이러한 추세에 따라 본 연구에서는 재취업 교육생의 IT융합창업교육이 자기효능감에 미치는 영향에 대하여 분석하고자 한다. 연구대상은 재취업 교육생 195명을 대상으로 2017년 5월 1일부터 2017년 7월 20일까지 설문조사를 실시하였다. 설문지는 사전에 연구대상자에게 설문 취지와 작성방법을 충분히 설명하고 자기기입식 방법으로 실시하였다. 분석방법은 SPSS 22.0 프로그램을 사용하여 빈도분석, 신뢰도분석, 상관관계분석, 다중회귀분석을 실시하였다. 연구결과 재취업 교육생 IT융합창업교육은 하위요인 교육내용, 강사, 학습구성원이 자기효능감에 긍정적인 영향을 미치는 것으로 나타났다. 그러나 교육시설은 자기효눙감에 유의한 영향을 미치지 않는 것으로 나타났다. 본 연구의 시사점은 재취업 교육생의 IT융합창업교육을 통해 자기효능감을 향상시킬 수 있는 IT창업관련 지원제도 마련의 기초자료가 될 것으로 사료된다 Recently, IT convergence technology has been emerging in all industrial fields through convergence of IT technology and various fields. In addition, IT convergence entrepreneurship education, which incorporates IT technology, is being implemented in the field of education. These IT convergence technologies are enhancing the problem solving ability based on computing thinking and the effect of IT entrepreneurship education. In this study, we try to analyze the effect of IT convergence entrepreneurship education on the self - efficacy of re - employment trainees. The subjects were 195 re - employment trainees from May 1, 2017 to July 20, 2017. The questionnaires were given to the subject in advance and the purpose of the questionnaire and the method of writing were fully explained and the self - filling method was used. Analysis conducted a frequency analysis, reliability analysis, correlation analysis, hierarchical regression analysis and multiple regression analysis using SPSS 22.0 program. As a result, it was found that IT convergence entrepreneurship education for reemployed students had a positive effect on self - efficacy of sub - factors education contents, lecturers, and learning members. However, education facilities did not have a significant effect on self - efficacy. The implication of this study is that it will be a basic data for providing support system for IT start - up that can improve self - efficacy through IT convergence entrepreneurship education for re - employment students

중학교 사회과 교과서 내 통계 그래프의 수학적 오류 분석

한성수(Han, Seong Soo),윤영주(Yoon, Young Joo) 학습자중심교과교육학회 2021 학습자중심교과교육연구 Vol.21 No.20

목적 본 연구의 목적은 중학교 사회과 교과서에서 등장하는 통계 그래프에서 나타나는 수학적인 오류의 양상을 살펴보고자 하였다. 방법 중학교 사회1, 사회2 교과서에 등장하는 통계 그래프에 대하여 분석하여 통계 그래프에서 볼 수 있는 수학적인 오류 양상을 살펴보기 위해 탁병주, 김다빈(2020)이 정의한 오류의 세 가지 유형에 따라 분류해 보고 오류가 어떠한 양상을 보이고 있는지 살펴보았다. 결과 중학교 사회과 교과서의 통계 그래프의 22.4%에서 오류가 나타났으며 오류의 대부분은 범주 표현, 빈도 표현에서의 오류가 대부분이었고 맥락 표현에서의 오류는 적었다. 결론 사회과나 타 교과에서 통계 그래프를 활용하기 위해 선택할 때 수학적 오류가 발생할 수 있는지 신중히 검토해야 한다. 또한 그래프의 오류와 관련한 그래프 작성 지침에 대한 활동을 고려해 볼 필요가 있다. Objectives The purposes of this study were to investigate the mathematical errors found in the statistical graphs of social studies textbooks of middle school. Methods The mathematical errors found in the statistical graphs of social studies textbooks were classified according to the three types of errors, and analyzed what the errors were showing. Results Mathematical errors could be identified in graphs corresponding to 22.4% of the statistical graphs in social studies textbooks, and most of them were errors in category representation and frequency representation. Conclusions We need to examine mathematical errors in statistical graphs when these are selected to use teaching materials in other subjects. In addition, it is necessary to consider the activities for graph-making instructions related to errors in the graph as learning content.

살충제 Carbofuran 과 Phenobarbital Sodium 및 3 - Methylcholanthrene 이 이스라엘 잉어의 효소활성에 미치는 영향

한성수(Seong Soo Han),임요섭(Yo Sup Rim),정재훈(Jea Hun Jeong) 한국응용생명화학회 1996 Applied Biological Chemistry (Appl Biol Chem) Vol.39 No.1

Effects of insecticide carbofuran and Phenobarbital sodium(PB) or 3-methylcholanthrene(3-MC) on activities of several enzymes in israeli carps were investigated. Survival number of Israeli carp was the same as that of control when PB and 3-MC only was treated, individually and that was low compared to control when carbofuran only was treated. But survival rate of Israeli carp was high compared to individual treatment of carbofuran when combination treatment of carbofuran and PB or 3-MC was carried out. These results indicate that PB and 3-MC can intervene to detoxify carbofuran exposed to israeli carp. In in vivo test for the effect of this chemicals on activity of enzyme in israeli carp, activities of acetylcholinesterase(AChE) and glutathione S-transferase(GST) were inhibited in carbofuran treatment, but did not in combination treatment of carbofuran and P3 or 3-MC. Activities of UDP-glucuronosyltransferase (UDPGT) and cytochrome P-450-dependent monooxygenase increased in individual or combined treatments of carbofuran and PB or 3-MC. These results suggest that a simultaneous application of carbofuran and PB or 3-MC is critical for the enhancement of activity of AChE, GST, UDPGT and monooxygenase and the protection of Israeli carp from carbofuran toxicity.

유기게르마늄 수용액으로 재배된 콩나물의 생육특성과 게르마늄 흡수량

한성수(Seong Soo Han),임요섭(Yo Sup Rim),정재훈(Jea Hun Jeong) 한국응용생명화학회 1996 Applied Biological Chemistry (Appl Biol Chem) Vol.39 No.1

In order to cultivate the soybean sprout fortified with organogermanium, we observed growth characteristics and germanium content of soybean sprout watered with the aqueous organogermanium, Ge-132[bis(2-Carboxyethylgermanium sesquioxide). Soybean sprout did not show difference in growth when treated with different times and frequencies of organogermanium or different types of germanium. Growth of Orialtae soybean sprout was smaller in diameter of hypocotyledonary axis and longer in total length than that of Danyeob soybean sprout. Three hour`s soaking was better in growth than half an boar`s treatment. Germanium absorbed by soybean sprout was greater in content in Danyeob soybean sprout than in Orialtae soybean sprout and highest at 20 ppm in water. Prolonged period and increased frequency in treatments with organic germanium resulted in increase of germanium uptake. Germanium content in soybean sprout was greater with treatment of organic germanium than with inorganic germanium.

[화학] 원자흡광분광법에 의한 식물체 중의 게르마늄 분석법 개선

한성수(Seong-Soo Han),임요섭(Yo-Sup Rim),김일광(Il-Kwang Kim) 한국분석과학회 1997 분석과학 Vol.10 No.3

[화학] 토양 중 제초제 Ethalfluralin의 잔류 농도와 반감기 분석

한성수(Seong Soo Han),임요섭(Yo Sup Rim),김일광(Il Kwang Kim) 한국분석과학회 1997 분석과학 Vol.10 No.3

EPON 장비 설계 및 구현

한성수(Seong-Soo Han),유석기(Seok-Ki Yoo),이순흠(Sun-Heum Lee),이병수(Byungsoo Lee) 한국정보기술학회 2005 한국정보기술학회논문지 Vol.3 No.4

In this paper, devices for EPON system have designed and implemented, which is one of practical technologies for achieving FTTH. The proper operation in packet exchange between OLT, is and ONT is confirmed on the test-bed.

쥐에서 phenobarbital sodium 및 3-methylcholanthrene이 ¹⁴C-carbofuran의 독성과 in vitro 대사에 미치는 영향

한성수(Seong-Soo Han),임요섭(Yo-Sup Rim) 한국농약과학회 1998 농약과학회지 Vol.2 No.2