• Title/Summary/Keyword: Growing environment

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Analysis and Improvement of Growing Environment of Two Tier Cropping Systems in Plastic Film House (플라스틱 온실내 2단 재배 시스템의 생육환경분석 및 개선)

  • 김문기;김기성
    • Journal of Bio-Environment Control
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    • v.8 no.1
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    • pp.49-55
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    • 1999
  • This study aims at analyzing environment factors of two tier cropping systems and suggesting effective structures of two tier cropping systems. The environment factors in two tier cropping systems are temperature, relative humidity, solar radiation, temperature of nutrient solution, and wind velocity. Especially, The most important factors are the solar radiation and the solar incident area between the two tiers. During the experiment, observations were made of the two levels in the plastic greenhouse. The highest temperatures were 38.3$^{\circ}C$ in the top level and, 35.5$^{\circ}C$ in the bottom level, respectively. The temperature of the nutrient solution between the two levels showed little difference. The relative humidity in the top level was 60~7o% and that in the bottom 65~80%, exhibiting that the bottom is approximately 10% higher. Change of photosynthetic photon flux density and solar radiation both have a tendency to be similar. The wind velocities for both levels were recorded at 0.1m.s$^{-1}$ in the afternoon and 0.05m.s$^{-1}$ in the evening. The solar incident areas in the bottom level increased by approximately 25% at an East-West position and 17.7% at a South-North position, respectively.

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Fertilizer Concentration after Flowering Affects Growth and Fruit Setting of Ornamental Pepper (개화 후 비료의 농도가 Ornamental Pepper의 생장과 착과에 미치는 영향)

  • 진영욱;정순주;이범선;강종구
    • Journal of Bio-Environment Control
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    • v.12 no.2
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    • pp.95-100
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    • 2003
  • To evaluate the effect of the fertilizer concentration after flowering on growth a31d fruit setting of ornamental pepper (Capsicum annuum L.), plants were fertilized with $100\;mg{\cdot}L^{-1} of N ($EC=0.8\;dS{\cdot}m^{-1}) until flowering, and then with 0 (no fertilizer), 100, 200 or $300\;mg{\cdot}L^{-1} of N (fertilizer solution EC of 0.15, 0.8, 1.45 or $2.10\;dS{\cdot}m^{-1}, respectively) until harvest. Maximum leaf area and shoot dry mass at the end of the growing period were obtained when plants were fertilized with $200\;mg{\cdot}L^{-1} of N. Total fruit number per plant at the end of the growing period was not different when plants were fertilized with 100,200 or 300 mg{\cdot}L^{-1}of N concentration. When plants were fertilized with $200\;mg{\cdot}L^{-1} of N, the number of fruits per plant was decreased significantly as compared to 100, 200 or $300\;mg{\cdot}L^{-1} of N, whereas the percentage of red fruits at the end of the growing period was maximized. Total fruit fresh weight per plant at the end of the growing period was highest with the concentration of $200\;mg{\cdot}L^{-1} of N. The EC of the growing medium remained within 0.8 to $1.2\;dS{\cdot}m^{-1}\;2.0\;to\;3.0dS{\cdot}m^{-1}, or 3.0 to 4.5 dS{\cdot}m^{-1}when fertilizer concentrations were 100, 200 or $300\;mg{\cdot}L^{-1} of N, respectively. Throughout most of the experiment, the pH of the growing medium remained within 5.4 to 6.2, but dropped to 4.9 near the end of the experiment when fertilizer concentration was 200 or 300\;mg{\cdot}L^{-1} of N. Content of most of the nutrients In the leaf was not affected by the different fertilizer concentration. Only aluminum was significantly affected and decreased linearly with increasing fertilizer concentration. The results from this study indicated that optimal fertilizer concentration after flowering for commercial production of ornamental pepper was 100 or $200\;mg{\cdot}L^{-1} of N. At these concentrations, the EC of the growing medium remained approximately within 0.8 to 1.2 and 2 to $3\;dS{\cdot}m^{-1}, respectively. This appears to be the optimal range for vegetative growth or fruit setting of ornamental pepper plants, and indicates that ornamental pepper can be grown with a fairly wide range of fertilizer concentrations.

Development of Growth Models as Affected by Cultivation Season and Transplanting Date and Estimation of Prediction Yield in Kimchi Cabbage (재배시기, 정식일에 따른 배추의 생육 모델 개발 및 생산량 예측 평가)

  • Lee, Jin Hyoung;Lee, Hee Ju;Kim, Sung Kyeom;Lee, Sang Gyu;Lee, Hee Su;Choi, Chang Sun
    • Journal of Bio-Environment Control
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    • v.26 no.4
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    • pp.235-241
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    • 2017
  • This study was carried out to estimate growth characteristics of Kimchi cabbage cultivated in two different growing seasons and three transplanting dates in the greenhouses, and to create a predicting model for the production of Kimchi cabbage based on the growth parameters and climatic elements. Kimchi cabbages were transplanted three times at intervals of two weeks in spring and autumn growing seasons. Sigmoidal models for the estimation of fresh weight (Fw) was designed with days after transplanting, which were Fw=4451.5/[1+exp{-(DAT-34.1)/3.6}]($R^2=0.992$) and Fw=7182.0/[1+exp{-(DAT-53.8)/11.6}] ($R^2=0.979$), respectively. The relationship between fresh weight of Kimchi cabbage and growing degree days (GDD) was highly correlated, and the regression model represented by Fw=4451.5/[1+exp{-(GDD-34.1)/3.6}] ($R^2=0.992$) in spring growing season. The yield of Kimchi cabbage under spring and autumn growing season were estimated 11348.3kg/10a and 15128.2kg/10a, respectively, which were much different than outdoor culture each growing season, while greenhouse cultivation have shown similar results. To estimate the efficacy of prediction yield in Kimchi cabbage, we will need to supplement a predicting model, which was based on the parameters and climatic elements by the field cultivation.

Executable Specification based Design Methodology - MPEG Audio IMDCT Design and Functional Verification (Executable Specification 기법을 이용한 MPEG Audio용 IMDCT 설계 및 기능검증)

  • 박원태;조원경
    • Proceedings of the IEEK Conference
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    • 2000.06b
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    • pp.173-176
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    • 2000
  • Silicon semiconductor technology agree that the number of transistors on a chip will keep growing exponentially, and it is pushing technology toward the System-On-Chip. In SoC Design, Specification at system level is key of success. Executable Specification reduce verification time. This Paper describe the design of IMDCT for MPEG Audio Decoder employing system-level design methodology and Executable Specification Methodology in the VHDL simulator with FLI environment.

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A Representation and Management of Models for WWW-based Decision Support Systems Development (WWW 기반의 의사결정지원시스템 구축을 위한 모형 표현 및 관리)

  • Kwon, O-Byung
    • Asia pacific journal of information systems
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    • v.7 no.2
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    • pp.35-49
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    • 1997
  • The usability of the Internet including WWW (World Wide Web) is dramatically growing in current business environment. These allow decision makers to enhance the productivity of decision making by referring valuable information in the remote sites, This paper presents the possibilities how WWW can be applied to build distributed and collaborative DSS, especially model management subsystem. A framework of Internet-based DSS is delineated, and then an idea of representing and managing models in the Internet-based DSS is suggested.

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GDAS and UNSPSC for the Distribution Industry (유통산업에 적용되는 GDAS와 UNSPSC 분류체계)

  • 이창수
    • Proceedings of the Korean Operations and Management Science Society Conference
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    • 2001.10a
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    • pp.265-268
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    • 2001
  • As growing the electronic commerce there are significant changes in the products/services catalog into the on-line environment. Advertent of e-catalog business opportunity for their own product/services enlarges the market volume and there are diverse methods for the presentation of its product/services. A method for the presentation of product/services features one uses identification and classification system. This study constructs a classification system and database layout for the product/services classification system as a part of e-catalog system. We consider the specific method for the GDAS-based dataset and UNSPSC classification system in the distribution industry.

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WWW 기반의 의사결정지원시스템 구축을 위한 모형 표현 및 관리

  • 권오병
    • Proceedings of the Korean Operations and Management Science Society Conference
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    • 1996.10a
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    • pp.69-72
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    • 1996
  • The usability of the Internet including WWW (World Wide Web) is dramatically growing in current management environment. These allow decision makers to enhance the productivity of decision making by referring valuable information in the remote sites. This paper presents how WWW can be applied to build distributed and collaborative DSS. Especially, a framework of Internet-based DSS is delineated, and then an idea of representing and managing models in the Internet-based DSS is suggested.

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Regional Air Pollution Problems in East Asia and International Role of Research Exchange

  • Akimoto, Hajime
    • Proceedings of the Korea Air Pollution Research Association Conference
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    • 2000.11a
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    • pp.8-8
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    • 2000
  • As economy and population have been growing, air pollution problems both in local and regional scale came to the surface in East Asia in last decades. In addition to urban problems, regional air pollution is also becoming a big issue international concern. Urban and regional air pollution issues are closely related and we have to tackle the problem by understanding underlying scientific reality and taking a strategic approach to mitigation. (omitted)

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Image Segmentation and Labeling Using Clustering and Fuzzy Algorithm (Clustering 기법과 Fuzzy 기법을 이용한 영상 분할과 라벨링)

  • 이성규;김동기;강이석
    • 제어로봇시스템학회:학술대회논문집
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    • 2000.10a
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    • pp.241-241
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    • 2000
  • In this Paper, we present a new efficient algorithm that can segment an object in the image. There are many algorithms for segmentation and many studies for criteria or threshold value. But, if the environment or brightness is changed, their would not be suitable. Accordingly, we apply a clustering algorithm for adopting and compensating environmental factors. And applying labeling method, we try arranging segment by the similarity that calculated with the fuzzy algorithm. we also present simulations for searching an object and show that the algorithm is somewhat more efficient than the other algorithm.

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Analysis of Pesticide Contaminants in Food (식품 중 잔류농약의 분석)

  • 김종규
    • Journal of Environmental Health Sciences
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    • v.19 no.1
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    • pp.90-93
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    • 1993
  • Increasing Public Concern : Pesticide residue is probably one of the fastest growing problems in regard to environmental contamination. Pesticide use in agriculture in this century has produced certain benefits, including a decrease in crop waste and an increase in crop yields and food quality. However, pesticide use also creates problems of having effects on the environment and remaining in food chain. The presence of pesticide residue in food, water, and soil has aroused public concern over potential health hazards. Despite information provided by national and private level agencies suggesting that food is safe, consumer groups worldwide are demanding assurance as to the safely of agricultural products.

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