버얼리種 乾燥時 철재파이프비닐하우스의 遮光程度가 煙草葉의 理化學性에 미치는 影響

石泳善 충북대학교 엽연초연구소 1995 煙草硏究 Vol.15 No.-

This study was conducted to investigate the effects of shading rate of the pipe house covered with transparent plastic during curing on the variation of physical and chemical characteristics in burley tobacco. The results are summarized as follows. The decomposition of chlorophyll and total sugar during curing were insufficient in lower shading rate, particularly in no shading. In the case of higher shading rate, the content of ammonia nitrogen was more increased and that of amino-nitrogen was less increased. Chlorogenic acid was less decreased with lower shading rate. Yellowished and photobleached leaves under higher than 60% shading were markedly decreased, while house-burned leaves was slightly increased. Though yellowished leaves greatly decreased by higher shading rate, but there was insufficient to prevent yellowished leaves. Especially, the treatment of no shading overdried the tobacco leaves during the initial stage of curing as indicated by the 50% abnormal leaves from half of total leaves being marked as yellowish.

收穫時期 및 黃變期間에 따른 黃色種 담배 乾燥中 內容成分 含量 變化

石泳善,具漢書 충북대학교 엽연초연구소 1997 煙草硏究 Vol.16 No.-

This study was conducted to investigate the effects of harvesting time and periods of yellowing stage on the chemical composition of the pit-covered mulching cultured flue-cured tobacco leaves during flue-curing process. The results are summarized as follows : 1.The changes of chlorophyll content in tobacco leaves was influenced more by harvesting time than period of yellowing stages. As the early harvesting, the chlorophyll content of cured leaves was appeared high in prolonged yellowing time case. 2.The content of sugar in tobacco leaves were increased in early stage during flute-curing process with delayed harvest and prolonged yellowing period. 3.Total nitrogen and amono-nitrogen in fresh and cured leaves decreased at the harvesting time delayed. Amino-nitrogen content of cured leaves at early harvesting increased as the yellowing time was prolonged, but increased as the yellowing time was shortened in the case of late harvesting.

잎담배 生産技術의 現況 및 發展方向

石泳善 충북대학교 엽연초연구소 1995 煙草硏究 Vol.15 No.-

This paper aims to analyse the general characteristics of tobacco productive circumstances and to suggest attention on mechanization alternatives that are available to build up the infra-structure for tobacco production. The characteristics of tobacco productive circumstances can be summarized as widespread small scale farming, high labor practices, and pit-covered mulching cultivation. Rapid development of economic growth during the last decade has been largely increased farm wages as decrease of the shortage of absoluted rural labors. Accompanying the labor problems have been a continual reducing of tobacco production. Much progress has been made in recent years in the development of new tools and techniques for all phase of tobacco production, form soil preparation to curing. The new developments should be considered both reducing labor and raising operational efficiency toward optimum levels. The improvement of productivity should be effectively produced on mechanization and techiques by float system and direct-seeding of transplants in large greenhouse, integrate work of soil preparation, many-sided machinery for field management, large curing facilities, automation of curing management, and large package of tangled leaf. The management rationalization should be effectively produced on expanding farm size, reforming farm land, specializing the seedling production, manufacturing compost and grouping the curing barn by contract farmers or encouraging group.

텍스트 마이닝 분석을 통한 조경시공 연구경향 분석

석영선,반권수 전북대학교 부설 휴양및경관계획연구소 2022 휴양및경관연구 (J East Asian Landscape Studies) Vol.16 No.3

This study aimed to derive research trends related to the landscape construction field from various academic journals published in Korea from 1980 to 2022 by using text mining techniques. Research trends were analyzed through VOSviewer, the big data analysis program, and focused on keywords for landscape construction. As a result, first, a total of 226 research papers related to landscape construction showed a gradual increase by an average annual average of 5.8. This is caused by the increase landscaping- related various academic journals since the 1980s, and the increase in research opportunities on landscape construction, methods of construction, and materials due to the expansion of the landscape industry. Second, as a result of analyzing co-occurrence keywords related to landscape construction, it appeared in the order of Plant, Management, Improvement, Species, etc. In addition, as a result of network analysis, it was classified into four research clusters: (1) Post-management and Function improvement, (2) Plant and Plant growth environment, (3) Space and Usability, and (4) Constructability and Economy. Third, as a result of analyzing the field of landscape construction based on the passage of time, the research trend of the field of landscape construction tends to embrace various topics. However, in the future, research on landscaping construction and maintenance smart technology in the era of the 4th industrial revolution, as well as the development of materials and construction methods considering climate change, will be more necessary. This study is meaningful in that it analyzed the research trend related to the landscape construction field in detail through bibliographic analysis for the first time in Korea. In addition, it is meaningful as fundamental data for deriving the developmental research direction in the landscape construction field in consideration of the social paradigm and technological trends changing in the landscape architecture industry. 본 연구는 1980년부터 2022년까지 국내에서 출판된 조경 시공 분야 관련 논문들을 대상으로 텍스트 마이닝 기반의 핵심 단어 분석 프로그램인 VOSviewer를 이용하여 연구 경향을 분석하였다. 연구 결과 첫째, ‘조경 시공’과 관련된 연구논문은 총 226편이며, 연평균 5.8편이 발표되었다. 이는 1980년대 이후 조경학 관련 학회 수의 증가 및 다양화, 조경 산업 확대에 따른 조경시 공, 공법, 재료 등의 연구 기회와 필요성 증가 등에 따라 점진적으로 증가하는 경향을 보인 것으로 사료된다. 둘째, 조경 시공과 관련된 동시 출현 빈도가 높은 핵심 단어를 분석한 결과, Plant, Management, Improvement, Species 등의 순으로 나타났다. 또한, 연관성이 높은 핵심 단어 간의 네트워크를 분석한 결과, ‘사후관리, 기능개선’, ‘식생, 생육환경’, ‘공간, 이용성’, ‘시공성, 경제성’ 등 4개 주제로 연구 영역이 분류되었다. 셋째, ‘조경시공’과 관련된 주요 연구영역별로 시간의 흐름에 기반하여 연구 경향 변화를 분석한 결과, 시대 변화에 따라 점차 다양한 주제를 포용하는 경향을 보였으나, 4차 산업혁명 시대에 걸맞도록 첨단 스마트 기술을 접목한 조경 시공·유지관리 기술 및 기후변화를 고려한 소재, 공법 개발 등에 대한 연구가 활발히 이루어져야 할 것이다. 본 연구는 조경 시공 분야에 대해 국내에서 최초로 빅데이터 기반의 서지 분석을 통해 연구 경향을 분석하였다는 점에서 의미가 있으며, 조경 산업의 사회적 패러다임과 기술 트랜드 변화 추이를 고려하여 조경 시공 분야의 발전적인 연구방향 도출을 위한 기초자료로 활용될 수 있다.

붉은별무늬病葉의 乾燥中 病班 및 化學成分 變化

石泳善 충북대학교 엽연초연구소 1999 煙草硏究 Vol.17 No.-

This study was conducted to investigate the changes of lesion tissue area and chemical composition on the brown spot infected tobacco leaf during flue-curing process. The results are summarized as follows. The lesion tissue area was influenced by duration and temperature of the yellowing period. The enlargement of necrotic tissue was in proportion to duration of yellowing period and that of halo tissue showed a slight decline at the tatter yellowing stage, but it was a little relation with yellowing temperature. Contents of chlorophyll, starch, total sugar, total-N, and curing ratio and equilibrium moisture content among necrotic part, halo part, and healthy part of brown spot lesions showed to be decrease from the healthy to the necrotic part, whereas protein-N, NH4-N, and NO3-N, contents were increase from the necrotic to the halo and the healthy parts in that order.

황색종 건조시 황변엽의 탈수건조 조건에 따른 건조엽의 품질

석영선,이철희,C. W. Suggs 한국연초학회 2003 한국연초학회지 Vol.25 No.1

This study was carried out to investigate the changes of dehydration process and quality of cured leaves with crushed midribs and cut of the yellowed leaves during drying stage of flue-cured tobacco. The crushed midribs of yellowed leaf dried out before raising the highest temperature of midrib drying stage and reduced the curing time by about 20 hours. However, the cut of yellowed leaf was not affected the curing time and dehydration process during drying stage of flue-curing due to a problem with the cut leaves packing excessively in the curing container. The cured weight yield was increased with crushed midrib and cut leaves, and nicotine and sugar contents of cured leaves and quality in terms of dollars per kilogram were decreased with crushed midrib and cut leaves.

열풍건조시 적입 및 송풍량에 따른 황색종 연초엽의 이화학성 변화

석영선,노재영 한국연초학회 1992 한국연초학회지 Vol.14 No.1

This studies were carried out to investigate the effects of leaf loading quantity and circulating air volume during bulk curing on the variation of physical and chemical characteristics in flue-cured tobacco. The results are as follows : 1. The content of sugar in cured leaves was decreased with more circulating air volume and leaf loading quantity at bulk curing. 2. Total nitrogen and protein nitrogen were decreased with less circulating air volume and more leaf loading quantity, while amino nitrogen was increased. 3. The contents of linolenic acid and linoleic acid were increased with more leaf loading quantity and oxalic acid and citric acid had a tendency of being increased in case of high circulating air volume. 4. In general, major aromatic compounds were increased through flue-curing. Relatively high content of solanone in case of lower air volume and less leaf loading were observed, while megastig matrienone was increased when leaf loading was small. 5. The more circulation air volume with leaf loading quantity caused lowering equilibrium moisture content and higher shatter index, which resulted in poor quality of cured leaves based on quality index, nitrogen number, taste index phillips index, and sugar-nicotine ratio.

지리정보시스템을 활용한 연초재배 토양의 비옥도 평가

석영선,홍순달,안정호 한국연초학회 1999 한국연초학회지 Vol.21 No.1

Field test was conducted in Chungbuk province to evaluate the soil fertility using landscape and soil attributes by application of geographic information system(GIS) in 48 tobacco fields during 2 years(1996 ; 23 fields, 1997 ; 25 fields). The soil fertility factors and fertilizer effects were estimated by twenty five independent variables including 13 chemical properties and 12 GIS databases. Twenty five independent variables were classified by two groups, 15 quantitative indexes and 10 qualitative indexes and were analyzed by multiple linear regression (MLR) of SAS, REG and GLM models. The estimation model for evaluation of soil fertility and fertilizer effect was made by giving the estimate coefficient for each quantitative index and for each group of qualitative index significantly selected by MLR. Estimation for soil fertility factors and fertilizer effects by independent variables was better by MLR than single regression showing gradually improvement by adding chemical properties, quantitative indexes and qualitative indexes of GIS. Consequently, it is assumed that this approach by MLR with quantitative and qualitative indexes was available as an evaluation model of soil fertility and recommendation of optimum fertilization for tobacco field.

미세먼지 저감을 위한 그린인프라 계획요소 도출 - 텍스트 마이닝을 활용하여 -

석영선,송기환,한효주,이정아,Seok, Youngsun,Song, Kihwan,Han, Hyojoo,Lee, Junga 한국조경학회 2021 한국조경학회지 Vol.49 No.5

Green infrastructure planning represents landscape planning measures to reduce particulate matter. This study aimed to derive factors that may be used in planning green infrastructure for particulate matter reduction using text mining techniques. A range of analyses were carried out by focusing on keywords such as 'particulate matter reduction plan' and 'green infrastructure planning elements'. The analyses included Term Frequency-Inverse Document Frequency (TF-IDF) analysis, centrality analysis, related word analysis, and topic modeling analysis. These analyses were carried out via text mining by collecting information on previous related research, policy reports, and laws. Initially, TF-IDF analysis results were used to classify major keywords relating to particulate matter and green infrastructure into three groups: (1) environmental issues (e.g., particulate matter, environment, carbon, and atmosphere), target spaces (e.g., urban, park, and local green space), and application methods (e.g., analysis, planning, evaluation, development, ecological aspect, policy management, technology, and resilience). Second, the centrality analysis results were found to be similar to those of TF-IDF; it was confirmed that the central connectors to the major keywords were 'Green New Deal' and 'Vacant land'. The results from the analysis of related words verified that planning green infrastructure for particulate matter reduction required planning forests and ventilation corridors. Additionally, moisture must be considered for microclimate control. It was also confirmed that utilizing vacant space, establishing mixed forests, introducing particulate matter reduction technology, and understanding the system may be important for the effective planning of green infrastructure. Topic analysis was used to classify the planning elements of green infrastructure based on ecological, technological, and social functions. The planning elements of ecological function were classified into morphological (e.g., urban forest, green space, wall greening) and functional aspects (e.g., climate control, carbon storage and absorption, provision of habitats, and biodiversity for wildlife). The planning elements of technical function were classified into various themes, including the disaster prevention functions of green infrastructure, buffer effects, stormwater management, water purification, and energy reduction. The planning elements of the social function were classified into themes such as community function, improving the health of users, and scenery improvement. These results suggest that green infrastructure planning for particulate matter reduction requires approaches related to key concepts, such as resilience and sustainability. In particular, there is a need to apply green infrastructure planning elements in order to reduce exposure to particulate matter.

황색종건조기의 열풍순환방향과 건조엽의 색상

석영선 충북대학교 연초연구소 2008 煙草硏究 Vol.21 No.-

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