• Korean journal of applied entomology
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• v.45 no.2 s.143
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• pp.227-234
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• 2006

For the biological control of the greenhouse whitefly, aphids, American leaf-miners, Encarsia formosa, Aphidius coiemani, Diglyphus isaea, and Dacnusa sibirica were used as biological control factors. Otherwise, many kinds of environment friendly agricultural materials were also used in the kindly environment friendly farming. For testing the toxicity of environment friendly agricultural materials against to insect parasitoids as biological control factors, 61 environment friendly agricultural materials were selected by using methods and periods with insect parasitoids in the greenhouses. Environment friendly agricultural materials were sprayed to mummies and adults of E. formosa and A. colemani, and adults of Diglyphus isaea and Dacnusa sibirica in laboratory condition. Emergence rates were checked during 12 days after spray to mummies of E. formosa and A. colemani, and survival rates were at 24 and 48 hours after viral test for adult parasitoids, with 10% sugar solution. Emergence rates of E. formosa mummies were inhibited by sprayed the fungicidal environment friendly agricultural material (FEFAM) E and the environment friendly agricultural materials contained molybdenum (EFAMMo) G as 0.4 and 2.7%, respectively. E. formosa adults were not survived in vial for 48hours after sprayed and dried with the environment friendly agricultural materials contained plant extract (EFAMPE) J and the EFAMMo C. The environment friendly agricultural materials contained microelements (EFAMMEs) B and EFAMPE H, environment friendly agricultural materials contained useful soil microorganisms (EFAMSMs) H, FEFAM A and FEFAM D were recorded low survival rates of E. formosa adults with 6.7, 13.3, 13.3, 20.0 and 20.0, respectively. In case of the spraying environment friendly agricultural materials to mummies of A. colemani there were low emergence rate from mummies to adults as around 20s % with water spraying as control. A. colemani adults were not survived in vial with EFAMMo C. EFAMPE J, EFAMPE F, EFAMPE H, EFAMSM H were recorded low survival rates under 20% as 6.7, 13.3, 13.3 and 13.3, respectively, D. isaea and D. sibirica adults were not survived in vial with EFAMPE J. EFAMMo C was 53.3% of survival rates in 48 hours vial tests. D. isaea and D. sibirica were not affected by environment friendly agricultural materials compared with E. formosa and A. colemani.

• Journal of Bio-Environment Control
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• v.18 no.4
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• pp.341-347
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• 2009

Experiments and computations were conducted to investigate the heat insulation characteristics of multi layer materials for cultivation greenhouse. In case of the experiments, measurements of temperature were carried out with a K-type thermocouples and data logger to research the heat transfer in the experimental module generated by the heat source. A thermal conductivity meter, QTM-500 based on modified transient hot wire method was used to measure the thermal conductivity of multi layer materials. The numerical analyses were performed by commercial code CFX-11 according to the variation of multi layer materials without air layer. The experimental results showed that the heat insulation of multi layer materials was higher than single layer materials by 50~90%. It was found that the effect of heat insulation was raised by the combination of multi layer materials.

• Korean Journal of Organic Agriculture
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• v.21 no.2
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• pp.233-246
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• 2013

This study was performed to investigate the recognition of Korean farmers for the safety of environment-friendly organic materials (EFOMs). The main purchase line of environment-friendly organic materials was the sustainable agriculture organizations, and decisive basis for the materials purchase was because they thought that agricultural produce cultivated with EFOMs were safe. Currently farmers obtained the most information about EFOMs through farmer's education operated by agricultural technology center. Sixty nine percent of respondents hoped that they would get the information on the website and through official education opened by of the government or relative institutions. Whereas, only a few respondents hoped that they would get the information from the sellers. Therefore we thought that government and related institutions should operate the education program to give the sellers the scientific and accurate information about EFOMs. In addition, farmers are highly recognized the necessity of safety-related information provided by government and related institutions. Most Farmers thought that safety education for farmers using EFOMs was very important. Also, it was confirmed that farmer respondents thought to need to establish the shelf-life and user guideline and to label about toxic category of EFOMs. The Cronbach' alpha coefficient calculated in order to verify the reliability of survey questions was 0.699. That value indicates that responses of the respondents in this study might be reliable.

• 월간 기계설비
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• s.245
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• pp.82-83
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• 2010

올 초만 해도 자재 시장에 큰 소용돌이가 있을 것이라는 견해가 지배적이었다. 결과는 찻잔 속의 태풍으로 그쳤다. 침체된 건설 경기에 돌파구가 생기지 않은 탓이다. 오히려 부도 여파와 줄어든 수요 때문에 자재 시장은 이전 투구의 양상까지 보이고 있다. 단기적으로 큰 변화가 없다고 전제할 때 당분간은 기업 경쟁력 강화 특히 구매력 강화에 더욱 힘써야 하겠다. 즉 회사의 구매 경쟁력 요소 중 강점은 더욱 부각시켜 단가 인하의 토대로 만들고 약점은 최소화하여 단가 인상을 막아야겠다. 연말 결산의 의미에서 회사의 구매 경쟁력 수준 파악에 필요한 요소들을 점검해 보고 그에 따른 경쟁력 강화 전략도 함께 살펴보겠다.

• 월간 기계설비
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• no.2 s.187
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• pp.44-54
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• 2006

사회가 복잡해지고, 개인의 삶의 질 향상에 대한 욕구가 높아지고 있는 현실에서 노력과 시간, 경비를 절감할 수 있는 인터넷 쇼핑은 가 장 보편타당한 구매 수단이 되고 있다. 대상 품목도 생필품에서부터 기업에서 필요로 하는 원자재에 이르기까지 모든 분야로 확대되고 있다. 설비건설업계도 예외는 아니다. 이제 설비업체의 자재담당자들은 필요한 자재 구매를 위해 공급사를 찾아 이리저리 전화하고 판매자를 만나 금액을 협의하는 절차가 없어지게 됐다. 인터넷에 들어가면 대부분의 자재와 그 자재를 공급하는 양질의 공급사를 만날 수 있고, 여러 공급사의 단가와 서비스 등을 어렵지 않게 비교할 수 있기 때문이다.

• 월간 기계설비
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• s.273
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• pp.76-79
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• 2013

'수도법' 제14조 및 환경부령 '수도용 자재와 제품의 위생안전기준 인증등에 관한 규칙' 제2조에 따라 물과 접촉하는 수도용 자재와 제품을 제조, 수입, 공급, 판매코자 하는 자는 '위생안전기준 인증(KC)'을 취득 후 제조, 수입, 공급, 판매해야 하며 위반 시 '수도법' 제83조, 제87조에 근거한 벌칙을 적용받게 된다. 또한 일반수도 및 전용 상수도를 설치하려는 자도 물과 접촉하는 수도용 자재와 제품을 사용할 경우에는 '수도법' 제14조제3항에 의거하여 '위생안전기준 인증(KC)' 제품을 사용해야 하며 위반 시 '수도법' 제83조에 근거한 벌칙을 받는다.

• Magazine of RCR
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• v.16 no.2
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• pp.50-55
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• 2021

• Journal of Food Hygiene and Safety
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• v.23 no.3
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• pp.182-190
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• 2008

A survey on consumer's awareness and perception toward genetically-modified(GM) foods was conducted on 2110 random samples of Korean consumers. More than 65% of the respondents were exposed to some information related to GM foods. The respondents answered that the greatest benefit of the development of GM foods is remedy of potential food shortages in the future. More than 90% of Korean consumers wanted GM foods to be labeled as such. More than 50% of the respondents would not buy until they know more about GM foods. Only 35.8% of Korean consumers were found to know that food items originating from plants contained genes. More consumers responded that they would not buy herbicide-resistant GM soybean but buy vitamin-enriched GM soybean. Many Korean consumers' decision of acceptance or rejection of GM foods depend not on the basis of biotechnology, but on the basis of the degree of benefit to the consumers. Only 6.4% of Korean consumers responded that GM foods were the greatest threat to the safety of Korean foods. The perception of Korean consumers on GM foods has not changed significantly during the past 5 years.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2006.11a
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• pp.597-601
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• 2006

There are considerable amount of man power and time spent for analysis and selection of various materials due to the inadequate application system and rapid searching process of material related information in each stage of building production process. Also, due to the insufficiency in recycling system of important information created for each process, they are hoarded at each task stage and project completion. As a result, because of the repetition of the similar/identical tasks on each process, it is the major reason for impeding the efficient employment of manpower of the company and decreasing competition of the company. Moreover, in selecting finish material in the project field, there are many difficulties due to the lack of technical information such as product characteristics and field applications. The construction quality also affects the profit and loss of the product which calls for a need to develop continued information management system that the finish material related examples could be shared in real time. The objective of this study is to propose a building finish material information which the real time research and application is possible to raise the productivity. TO do this, the current material information task status analysis and questionnaire research should be conducted to understand the demand of system development and reflect the result onto the system for easy access and application. Therefore, the building finish material information system for enhancement of productivity of construction task proposed in this study is expected to be utilized in enhancement of construction quality, maximization of company profit, and strengthening of company competition.

• Korean Journal of Organic Agriculture
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• v.25 no.1
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• pp.161-170
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• 2017

To investigate the influence of long-term organic cultivation on soil characteristics, chemical properties of 35 soils in the national scale organically managed over 10 years were analyzed. 57% of soils which were managed by the materials containing livestock manure have higher nutrient concentration than the materials not containing livestock manure. The decomposed composts (containing livestock manure) had higher amount of $P_2O_5$, CaO, $K_2O$ than organic fertilizers (not containing livestock manure). In the results, the nutrient concentration of soils in long-term organically managed was higher than optimum range of upland soil, especially pH 6.9, available phosphorus (Av. $P_2O_5$) 744 mg/kg, exchangeable calcium $9.4cmol_c/kg$, potassium 2.51 cmolc/kg. On the other hand, more than 50% of soils had lower concentration of exchangeable magnesium than optimum range (soil nutrient distribution was unbalanced). It is suggested that farmers have to be careful to apply organic materials, especially containing livestock manure.