• Journal of Bio-Environment Control
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• v.19 no.3
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• pp.135-139
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• 2010

This experiment was conducted to investigate the difference among 3-years-used polyolefin films which were J-l, J-2 and J-2 having differences in film thickness, infrared absorption and ultraviolet penetration from Jan. 16, 2006. And 1-year-used polyethylene film K-1 used from Jan. 16, 2009, for covering film of greenhouse for oriental melon cultivation. J-2, J-3 and J-1 films were better for keeping heat in order, and J-2 film was the best in plant growth at early stage. The first blooming and harvesting days in J-2 film were earlier 15 days than those in K-1 film. Chromaticity and soluble solid of harvested fruit in J-2, J-3 and J-1 films were higher than whose in K-1 film. Marketable yields in J-2, J-3 and J-1 films were higher in order.

• Journal of the Korean Solar Energy Society
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• v.26 no.3
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• pp.1-8
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• 2006

The objective of this research is to study on the analysis of long-term performance characteristics of various solar thermal system for heating protected horticulture system for reducing heating cost, increasing the value of product by environment control, and developing advanced culture technology by deploying solar thermal system. Long term field test for the demonstration was carried out in horticulture complex in Jeju Island. Reliability and economic aspect of the system which was operated complementary with thermal storage and solar hot water generation were analyzed by investigating collector efficiency, operation performance, and control features. Optimum operating condition and its characteristics were closely investigated by changing the control condition based on the temperature difference which is the most important operating parameter. However, it is expected that, in high-insolation areas where large-scale ground storage is adaptable, solar system demonstrated in the research could be economically competitive and promisingly disseminate over various application areas.

• Journal of Animal Environmental Science
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• v.3 no.1
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• pp.35-42
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• 1997

The purpose of this study is to investigate the effect of the biologically treated animal wastewater as a liquid fertilizer in the paddy rice. The treated water has content of the ammonia nitrogen 24mg/I and nitrate 40 mg/I on an average in the first year. A trace of nitrite has been shown. The phosphate content was 92 mg/I on an average. The amount of yielded rice was 365kg/10a for test 1 (no fertilizer), 388dg/10a for test 2(chemical fertilizer), 526kg/10a for test 3 (treated water) respectively. The treated water showed 35% more in production than the chemical fertilizer. The treated water has content of the ammonia nitrogen 40mg/I and nitrate 67mg/I on an average in the second year. A trace of nitrite has been shown. The phosphate content was 57mg/I on an average. The amount of yielded rice was 402kg/10a for test 1, 505kg/10a for test 2, 607kg/10a for test 3 respectively. Yield of unhulled rice was 20% more in the plot of treated water than that of chemical fertilizer.

• 한국신재생에너지학회:학술대회논문집
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• 2005.06a
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• pp.403-407
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• 2005

Objective of the research is to demonstrate solar thermal space and ground heating system which is integrated to a greenhouse culture facility for reducing heating cost, increasing the value of product by environment control, and developing advanced culture technology by deploying solar thermal system. Field test for the demonstration was carried out in horticulture complex in Jeju Island. Medium scale solar hot water system was installed in a ground heating culture facility. Reliability and economic aspect of the system which was operated complementary with thermal storage and solar hot water generation were analyzed by investigating collector efficiency, operation performance, and control features. Short term day test on element performance and Long term test of the whole system were carried out. Optimum operating condition and its characteristics were closely investigated by changing the control condition based on the temperature difference which is the most important operating parameter. For establishing more reliable and optimal design data regarding system scale and operation condition, continuous operation and monitoring on the system need to be further carried out. However, it is expected that, in high-insolation areas where large-scale ground storage is adaptable, solar system demonstrated in the research could be economically competitive and promisingly disseminate over various application areas.

• Journal of Wetlands Research
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• v.11 no.3
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• pp.81-88
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• 2009

The cows manure has been used as fertilizers in farmland because of enough nutrients. However, excess nutrients can be washed off during a storm and affected on nearby waterbodies. In this paper, the runoff characteristics from farmland were studied to determine the watershed runoff rate. As results of estimating, watershed runoff rates with short-term runoff are BOD 0.6%, CODcr 0.3 %, CODMn 0.1 %, T-N 0.8 % and T-P 1.0 % On the other hand, they with long-term runoff are BOD 3.6 %, CODcr 1.0 %, CODMn 0.9 %, T-N 4.9 % and T-P 4.8 %. It is clean that the watershed runoff rates increase according to the rainfall runoff time.

• New & Renewable Energy
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• v.1 no.2 s.2
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• pp.53-59
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• 2005

Objective of the research is to demonstrate solar thermal space and ground heating system which is integrated to a green-house culture facility for reducing healing cost, Increasing the value of product by environment control, and developing advanced culture technology by deploying solar thermal system. Field test for the demonstration was carried out in horticulture complex In Jeju Island. Medium scale solar hot water system was installed in a ground heating culture facility. Reliability and economic aspect of the system which was operated complementary with thermal storage and solar hot water generation were analyzed by investigating collector efficiency, operation performance, and control features. Short term day test on element performance and Long term test of the whole system were carried out. Optimum operating condition and its characteristics were closely Investigated by changing the control condition based on the temperature difference which Is the most important operating parameter For establishing more reliable and optimal design data regarding system scale and operation condition, continuous operation and monitoring on the system need to be further carried out. However, It is expected that, in high-insolation areas where large-scale ground storage is adaptable, solar system demonstrated in the research could be economically competitive and promisingly disseminate over various application areas.

• Korean Journal of Environment and Ecology
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• v.8 no.2
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• pp.81-92
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• 1995

The flora of the Chuwangsan National Park was surveyed. The field works was done for three times from February to October, 1994. The total number of vascular plants in this area were surveyed as 433 taxa ; 94 families, 260 genera, 365 species, 60 varieties, 2 subspecies, 5 formas, and 1 cultivars. The twenty seven taxa which were artificially planted could be found at the temple and abandoned cultivated areas. The population of Jeffersonia dubia Benth, one of the rare and endangered plants in Korea, were surveyed and mapped for an ecological monitorings in the future. Since this population is restrictly located in the vicinity of the mountain trails, the protection measures should be urgently needed in the future.

• Proceedings of the Korea Water Resources Association Conference
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• 2011.05a
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• pp.366-366
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• 2011

수자원 관리 정책은 한정된 수자원의 재배분과 효율적 이용, 수요관리에 의한 물 절약 정책 등, 지속가능한 발전을 추구하면서 물 부족의 사회적 대응력을 향상시키기 위한 정책으로 전환되어 가고 있다. 환경부에서는 2000년에 "물 절약 종합대책(2000.3)"발표를 시작으로 시 도별 "물 수요관리 종합대책"을 수립하였고, "수자원장기종합계획(2006.9)"수립에서는 수요관리 시나리오에 따른 장래수요량을 예측하여 발표하였다. 그러나 수요관리에 따른 절감량 산정 및 정량화된 수요량 평가 시스템의 부재로 수요관리 정책수립이나, 장래 용수수요량 예측에 어려움을 겪고 있다. 이에 따라 물 수요관리에 따른 물 사용량의 변화를 파악하고, 이를 이용하여 장래수요량 예측 및 물 수급전망에 연계할 수 있는 시스템이 필요하다. 본 연구에서는 지자체별 수요관리 계획 및 추진결과에 따른 물 사용량의 변화를 분석하였다. 또한 수요관리 계획과 추진전후의 상수도 관련 지표를 비교하여 합리적인 수요관리 계획 수립을 제안하였다. 분석결과 물 절약 종합대책 및 물 수요관리 종합대책 수립이후 1인1일당 급수량의 증가가 대체로 둔화되는 것을 알 수 있었다. 그렇지만 수요관리 계획을 수립한 일부 지자체는 과도한 계획수립으로 인하여 계획대비 수요관리 추진 효과가 미비한 곳도 있었다. 이러한 지자체는 현 상황을 고려한 합리적인 수요관리 계획 수립이 필요함을 알 수 있었다. 본 연구결과는 장래 용수수요량 예측이나 물수요관리 정책수립에 활용할 수 있을 것으로 판단된다.

• Journal of Plant Biology
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• v.2 no.1
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• pp.35-42
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• 1959

The cuttings and apical portion of stein in sweet potato were growlh under artificial light and specific photoperied and temperature. Though the plant growth was poor under insufficient light intensity of artificial light, the tuber formations were induced at long light period (16L+8D) and not induced at short light period (8L+16D) and low temperature of darkparied. The determinative factor for tuber formation of sweet potato seems to be a stimulation which has intimate relationship with specific photoperiod and temperature and no direct relation with the growth of plant body and light intensity. The root pattern of inductive state for tubers and non-inductive state were different distinctly, the former were silky and slender, the latter were branchy, and stout appearence. This different root pattern must be due also to the specific photoperiod and temperature and may have any relationship with the stimulation for tuber formation from the point of auxin physiology etc.

• Prospectives of Industrial Chemistry
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• v.14 no.4
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• pp.29-40
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• 2011

앞으로 글로벌 시장에 진입할 수 있는 작물보호 신물질 개발을 위해서는 기술 난이도가 크면서 파급성 및 경제성을 갖는 친환경 신규작용점 탐색과 독창적 Scaffold를 갖는 후보물질 또는 천연물소재 발굴에 주력해야 하며, 이를 지원하는 HTS, 화합물은행 및 천연물은행 활용 분자설계 및 최적화 합성기술 등 후보물질 발굴 핵심 기술개발에 국가적인 지원이 지속적이고 장기간에 걸쳐 이루어져야 한다. 고품질의 식량생산 관리기술은 물론 석유대체 에너지 확보를 위한 농작물 바이오매스(작물, 사료, 바이오연료 등) 생산관리기술로서, 그린바이오기반(Target 효소, 천연물소 재탐색응용) 저탄소 녹색성장을 실현시키기 위한 친환경적인 생화학 작물보호제 개발이 필요하다. 또한 인구 증가와 유가상승 등 전 세계적인 경제위기 극복과 이산화탄소 증가에 따른 온난화 등 지구환경보존의 중요성이 크게 증가되면서 안전한 먹거리 생산과 환경오염을 최소화하는 지속적 생산체제를 갖추기 위하여 LOHAS (Lifestyle Of Health And Sustainability) 트랜드가 최근 농업의 화두로 떠오르고 있다. 이를 만족시키기 위하여 OECD를 중심으로 하는 선진 국가들은 기존 작물보호제의 사용을 5년 이내에 현재 사용량의 절반 이하로 감소시키고자 하고 있는데, 특히 지속적 재배와 국민건강 보호를 위한 LOHAS 농작물의 생산이 매년 50-100억불로 성장하고 있다. 이러한 추세는 2017년까지 그 성장세가 계속 지속될 것으로 예상되고 있어 미생물/생화학 중심의 바이오작물보호제의 개발은 LOHAS 트랜드를 충족시킬 수 있는 유력한 수단으로 인식되고 있다.