• 한국물환경학회지
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• 제24권1호
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• pp.91-98
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• 2008

This work was performed to develop a model possible to predict the influent flow and influent components, which are one of main disturbances causing process problems at the operation of municipal wastewater treatment plant. In this study, artificial neural network (ANN) was used in order to develop a model that was able to predict the influent flow, $COD_{Mn}$, SS, TN 1 day-ahead, 2day-ahead and 3 day ahead. Multi-layer feed-forward back-propagation network was chosen as neural network type, and tanh-sigmoid function was used as activation function to transport signal at the neural network. And Levenberg-Marquart (LM) algorithm was used as learning algorithm to train neural network. Among 420 data sets except missing data, which were collected between 2005 and 2006 at field plant, 210 data sets were used for training, and other 210 data sets were used for validation. As result of it, ANN model for predicting the influent flow and components 1-3day ahead could be developed successfully. It is expected that this developed model can be practically used as follows: Detecting the fault related to effluent concentration that can be happened in the future by combining with other models to predict process performance in advance, and minimization of the process fault through the establishment of various control strategies based on the detection result.

• 한국농림기상학회지
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• 제22권4호
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• pp.340-345
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• 2020

본 연구에서는 첨단 옥외환경조절시설인 SPAR 시스템의 작물 및 환경 관측 자료의 품질 관리와 보증 방법을 최초로 제시하였다. 특히 실시간 군락 CO2플럭스의 경우에는 수집되는 자료의 특성을 고려하여 이상치의 제거와 보정이 병행되어야 함을 확인하였다. 본 연구를 통해 구축된 자료 처리 방법들은 향후 SPAR 자료를 통한 작물 생육 모형 개선에 매우 중요하게 활용될 수 있을 것으로 보인다. SPAR 내 작물과 환경 관련 10분 평균 자료는 국립식량과학원 내 작물 연구 통합 정보시스템(Crop Research Information System, CRIS) 웹사이트(www2.nics.go.kr/cris)에서 이용 가능하다.

• Ecology and Resilient Infrastructure
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• 제10권4호
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• pp.226-236
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• 2023

기후변화가 심화됨에 따라 식물계절연구의 중요도가 증가하고 있으며 자동영상촬영장치 (피노캠, Phenocam)을 활용한 연구방법이 급부상하고 있다. 본 연구에서는 국립생태원에서 운영하는 피노캠을 활용하여 국내 주요 생태계 유형에 대한 식물계절 변화의 경향을 확인하고 기후요인과의 상관관계를 분석했다. 식물계절의 변화 양상은 지역 및 수종별로 다르게 나타났다. 곰솔 및 소나무림은 전체 생장 기간이 증가하는 경향을 보이며 주로 겨울철 기온과 강수량과 양의 상관관계를 보였으나, 한라산 구상나무는 8월 강수량이 많을수록 생장종료일이 빨라졌으며 최근 발생하는 구상나무 고사 현상과의 연관성 분석이 추후 필요할 것으로 보인다. 분석 결과에서 더 나아가 데이터 수집 과정에서 발생할 수 있는 결측치 문제 등에 대한 해결책을 제시하였으며, 향후 연구 범위를 확장하고 다양한 생태계 유형을 반영하기 위해 피노캠 연구와 위성 관측을 결합하는 방안을 제안하였다.

• 한국토양비료학회지
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• 제18권1호
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• pp.32-37
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• 1985

볏짚부초의 인삼(人蔘) 근부(根部) 및 지상부생육(地上部生育)에 대(對)한 효과(效果)와 토양(土壤)의 물리(物理) 및 화학성(化學性)에 주는 영향(影響)은 포장조건(圃場條件)에서 조사(調査)하였다. 볏짚부초는 수량(收量), 경장(莖長)과 엽면적(葉面積)을 증대(增大)하고 낙엽주율과 결근율을 감소시켰다. 볏짚부초는 토양(土壤)의 경도(硬度), 공극율(孔隙率)을 좋게 유지시켰다. 볏짚부초는 보수력(保水力)을 증대(增大)시키고 지온(地溫)을 강하(降下)시켰으며 후행(後行), 전행(前行) 중간행(中間行)의 순(順)으로 그 효과가 적어졌다. 볏짚부초는 토양의 유효인산(포장에 따라 극심하게), 치환성 칼리, 유기물 함량을 증대시키고 치환성 칼슘함량을 감소시키고 pH 강하를 억제하였다. 볏짚부초는 잡초발생(雜草發生)을 크게 억제하였고 토니(土泥)의 오염을 막았으며, 골가토, 두둑다짐, 상면가토 등의 작업을 배제하였다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2015년도 춘계학술대회
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• pp.728-731
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• 2015

제조공정의 대다수 장비들은 기존의 수동 설비에서 자동화 시스템이 접목된 설비로 전환되는 추세다. 공정 의사결정을 내리는 생산 관리자들은 전문적인 의사결정 기법의 관리 및 활용이 익숙하지 않기 때문에, 시스템 등의 방안을 이용하기보다 컨설팅 등의 외부 중개자를 통해 단발적인 조치를 받는 것이 일반적이다. 본 연구에서는 제조공정에서 발생하는 데이터 입력의 문제점과 의사결정 시스템을 통하여 납기일에 맞추어 납품이 가능한지, 공정 중에 사용되는 자재들의 수급 정보를 확인하고, 다중 입출력장치인 Android Application과 ATmega2560을 활용한 입력 모듈을 제안하였다. 이로 인하여, 제조 공정 생산업무의 작업효율 향상 및 공정 정보의 변경에 쉽게 대응 및 작업 공장 데이터 누락 감소하였으며, 생산성 향상으로 인한 납기일 준수 및 제품 만족도 향상으로 경영 개선에 이바지 하고자 한다.

• 한국약용작물학회지
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• 제23권1호
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• pp.27-36
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• 2015

Shading and soil environment are the main factors of growth and yield in ginseng (Panax ginseng C. A. Meyer). Ginseng yield is directly related to survival rate because of increased missing plant for their growing period. Under field conditions, diseases and pests significantly affect plant survival rate. We evaluated the seedling establishment, growth and ginsenoside of the ginseng plants, under controlled management conditions in a plastic greenhouse, when their treated with different types of organic matter. Ginseng seeds were sown at a rate of three seeds per hole, and the seeding space measured $10cm{\times}15cm$. Compared to the control, treatment of cattle manure vermicompost (CMV) was shown to increase seedling establishment and decrease ginsenoside content. Root weights of plants treated with CMV were higher than those of plants treated with other types of organic matter. In addition, seedling establishment of 2-year-old ginseng plants was decreased when it was compared to that of 1-year-old ginseng plants. Our results indicated that organic matter type and rate were associated with seedling establishment, growth characteristic and ginsenoside content in greenhouse of ginseng direct-sowing culture.

• Journal of Ginseng Research
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• 제4권1호
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• pp.104-120
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• 1980

The effects of temperature on transpiration, chlorophyll content, frequency and aperture of stomata, and leaf temperature of Panax ginseng were reviewed. Temperature changes of soil and air under spade roof were also reviewed. Growth responses of responses of ginseng plant at various temperature were assessed in relation to suseptibillity of ginseng plants. Reasonable management of ginseng fields was suggested based on the response of ginseng to various temperatures. Stomata frequency may be increased under high temperature during leaf$.$growing stage. Stomata aperture increased by high temperature but the increase of both frequency and aperture appears not enough for transpiration to overcome high temperature encountered during summer in most fields. Serial high temperature disorder, i.e high leaf temperature, chlorophyll loss, inhibition of photosynthesis, increased respiration and wilting might be alleviated by high humidity and abundant water supply to leaf. High air temperature which limits light transmission rate inside the shade roof, induces high soil temperature(optimum soil temperature 16∼18$^{\circ}C$) and both(especially the latter) are the principal factors to increase alternaria blight, anthracnose, early leaf fall, root rot and high missing rate of plant resulting in poor yield. High temperature disorder was lessen by abundant soil water(optimum 17∼21%) and could be decreased by lowering the content of availability of phosphorus and nitrogen in soil consequently resulting in less activity of microorganisms. Repeated plowing of fields during preparation seems to be effective for sterilization of pathogenic microoganisms by high soil temperature only on surface of soils. Low temperature damage appeared at thowing of soils and emergence stage of ginseng but reports were limited. Most limiting factor of yield appeared as physiological disorder and high pathogen activity due to high temperature during summer(about three months).

• 한국잡초학회지
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• 제16권3호
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• pp.176-180
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• 1996

지속적 농업을 구현하는 차원에서 제안된 논 무경운체계에서 이앙전 발생한 둑새풀을 효과적으로 방제하기 위하여 제초제의 종류와 처리시기 및 처리약량을 달리하여 둑새풀 방제가, 재생정도 및 전년도 탈립된 벼의 발생정도를 조사한 결과는 다음과 같다. 1. 둑새풀은 4월중순부터 생육이 급격히 진전되었으며, 무경운 경관년수가 깊어질수록 그 발생량은 많아졌다. 2 둑새풀 방제를 위하여 Glyphosate를 이앙전 20일경에 살포하는 것이 적당하였다. 3. 벼 이앙시 결주율은 비선택성 제초제 처리시기가 늦을수록 높아졌으며, 이앙후 생육은 처리시가가 빠를수록 양호하였다. 4. 잡벼 발생은 비선택성 제초제를 살포하지 않을 경우 1,600개체/10a 정도 발생하였으며, 제초제 처리시기가 늦을수록 적게 발생하였다.

• 한국약용작물학회지
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• 제23권2호
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• pp.150-154
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• 2015

Physiological disorders such as symptoms in leaf colored with brown spots are so many occurred in ginseng garden cultivated with paddy soil. This study was carried out to inhibit the symptoms of brown-colored leaf in 3-year-old ginseng by fertilizing calcium hydroxide [$Ca(OH)_2$] of 100 ~ 400 kg per 10a on paddy soil before transplant of seedling. Soil pH was rapidly increased, while Fe was decreased in soil by the increase of application level of calcium hydroxide. Soil pH was increased from 4.53 to 6.18 when calcium hydroxide was fertilized at level of 100kg per 10a. The content of Fe in ginseng leaf was decreased more than the control by fertilizing calcium hydroxide in soil. Ratio of brown-colored leaf and plant height and leaf area were decreased by the increase of calcium hydroxide. Ratio of survived root and yield of root showed the peak at the application level of 100 kg per 10a, and both of them were gradually decreased by the increase of calcium hydroxide. The decrease of missing plant rate above the application level of 200 kg per 10a had a negative effect on the decrease of yield of root.

• 한국약용작물학회지
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• 제21권5호
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• pp.372-379
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• 2013

The present study was investigated the effect of planting density on plant growth and yield of Panax ginseng C. A. Meyer. Sowing density is one of the most important factors affecting yield. The value of roots have affected by shape, color, weight and degree of disease injury in ginseng. Also, it needed to minimize elapsed time for 5 years including pre-planting field management and cultivation period. We were conducted to evaluate that planting densities and varieties on the growth, yield and missing rate. The direct sowing was treated seeds density as a four levels (seeds; 72, 90, 120, 144) and 10 different varieties with 3 years old ginseng roots. Root weight was significantly affected by planting density and variety, but the number of lateral root and yield were affected by only planting density. Growth index was related to variety and planting density. Also, Root shape index was affected by both varieties and planting densities. Suitable planting density and variety were 120 plant per 1.62 $m^2$ and Gopoong, respectively. Results showed that it was also a significant difference (p=5%) in variety of planting density on growth.