• Journal of Bio-Environment Control
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• v.16 no.1
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• pp.13-20
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• 2007

This study was conducted to collect the basic data fo the development ot hydroponic technique and the efficient promotion of water culture. We have also analysed the water culture associated domestic patent application informations searching for on-line internet site with an admission fee (http://www2.wips.co.kr) from the year 1983 to January, 2006. Fifty nine patent applications related to the hydroponics were searched for in this study. Main patent contents applied were as followed in the order of that nineteen applications about the hydroponic equipments by 32.2%, thirteen applications about the materials used in water culture by 22.0%, eleven applications about the composition of nutrient solution by 18.6%, nine applications about the cultural methods by 15.3%, and seven applications about the cultural media by 11.9%. The compositions of nutrient solution and the cultural methods intended for specific crops were increased in number following five applications about tomato plants and four applications about potatoes. Thirty three patents (55.9%) were mainly applied before the year 2000. Main patent contents were the compositions of nutrient solution before the year 2000 in contrast to the cultural methods and substrates after the year 2000.

• Proceedings of the SAREK Conference
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• 2007.06a
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• pp.195-195
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• 2007

• Proceedings of the Korean Ceranic Society Conference
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• 2003.10a
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• pp.211.2-211
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• 2003

• The Journal of Bigdata
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• v.2 no.1
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• pp.49-58
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• 2017

The inventory location is the mos important factor which decide the efficiency of picking orders. According to the inventory location, it is possible to optimize the route for picking order, and then it makes us to expect the cost reduction and efficiency improvement. However, it is practical situation to make decisions where to keep the products based on manager's intuition and experience, not based on the systematical or analytical approach. In this research, with the practical order data of cropper product and layout for the storage yard, the association rules have found, and then the new methodology has been devised to make the decision where to keep the inventory. By utilizing the practical order data for a year, it has been proved that the proposed approach can reduce the total distance of the all routes for picking order and solve the problem of delayed delivery.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.22 no.3
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• pp.147-151
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• 2012

Carbon dioxide ($CO_2$) could be stored in the form of Ca and Mg compounds including alkaline earth metal by carbonation. The possibility of $CO_2$ storage was tested by using desulfurized ash from fluidized bed type boiler as raw material. Autoclave was used for maintaining the reaction pressure and temperature for the carbonation. The analysis of weight change rate, XRD, and TG/DTA proved that more than 15 % of carbonation rate was obtained under 10 $kgf/cm^2$ and $120^{\circ}C$-10 min.

• Journal of the Korean Institute of Gas
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• v.26 no.4
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• pp.18-26
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• 2022

The Korean government is conducting heat-using equipment(industrial boiler) inspection in accordance with the Energy Use Rationalization Act because of the heat-using equipment(industrial boiler)'s risks such as explosion and fire, and safe use and management. This paper aimed to setup the safe and performance vulnerabilities from database based on the inspection results for heat-using equipment(industrial boiler). This study surveyed the inspection results of 1,249 heat-using equipment(industrial boiler) which were failed inspection of heat-using equipment(industrial boiler) from january 2016 to december 2020. And the analysis method is to inform safety and performance vulnerability categories of heat-using equipment(industrial boiler) by statistically analyzing the failure reasons of boiler type and inspection type which are high variance in failure rate. The safety and performance vulnerability categories was abbreviated into 18 cases. And each catagory's main reason for failure was suggested by additional analyzing the opinions of inspectors. This paper would be the basic source and the comprehensive information dealing with the safety and performance vulnerability of heat-using equipment(industrial boiler).

• The Monthly Technology and Standards
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• s.117
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• pp.29-31
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• 2011

한국건설생활환경시험연구원(이하 KCL)은 건축자재, 토목 관련 제품, 생활환경, 물류, 의료기기 등에 대한 시험 평가 인증과 교육 컨설팅, 연구개발 등을 효율적으로 수행하고 있으며, 국내 산업의 기술 고도화와 소비자 보호, 국가경쟁력 제고를 위해 설립된 시험인증 기관이다. KCL은 특히 2010년 7월 8일 한국건자재시험연구원과 한국생활환경시험연구원이 통합 출범한 이후 더욱 풍부한 경험과 노하우를 축적하게 되었고 전문인력과 첨단 인프라를 갖추게 되었다. 현재 약 500여 명의 전문요원이 국내외 20개 사업장에서 일하고 있다. KCL은 지식경제부, 국토해양부, 환경부 식약청 등 주요 12개 부처에서 40여 개 기관지정을 받은 전문시험연구기관이며, TUV, MTS, Eurofins 등 해외 유수의 기관들과 MOU를 체결하여 해외로의 진출에도 적극 앞장서고 있다.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2000.04a
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• pp.366-368
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• 2000

휘발성유기화합물질(Volatile Organic Compound ； VOCs)은 오존등 광화학옥시단트로 인한 대도시의 대기질 악화와 함께 도시환경에서 중요한 발암성 물질이거나 만성 또는 급성의 건강장해를 일으킴으로써 공중보건상에 나쁜 영향을 주는 것으로 조사되고 있다. 특히 실내 공기중의 VOCs는 건축자재, 가구, 접착제, 카페트, 흡연 및 취사행위 및 난방을 포함한 연료의 연소 등 다양한 오염원으로부터 방출되는 건으로 알려져 있다. (중략)

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2000.04a
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• pp.341-344
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• 2000

건설시장의 개방에서 경쟁력을 확보할 수 있도록 시장 개방과 때를 같이 하여 국내 모든 사업장에서 750 인증 취득이 활발하게 진행되어 왔다. 특히 최근 들어 국내건설회사와 협력업체 및 건자재 관련 업체에서는 경쟁적으로 ISO 인증을 활발히 취득하였다. 특히 관급 공사와 관련된 입찰과정에서 가산점이 부여되면서 이러한 현상은 더욱 활발하게 이루어 졌다. 건설현장에서의 실질적인 ISO SYSTEM 적용은 우리 나라의 여건상 매우 어려우며 설사 시스템을 구축하였다고 하여도 이를 효과적으로 운용하기가 매우 어렵다. 본 사례는 건설현장에서의 ISO에 대한 인식부족과 적용과정에서 많은 시행착오를 범하고는 현실적인 어려움을 극복하고 국내 건설 현장에서의 ISO SYSTEM의 실제적인 구축방법을 제시하였으며 이를 효과적으로 활용하는 방안을 제시하였다. 특히 부산 거제 현대 아파트현장에서 이를 적용한 결과를 ISO 20가지 항목별로 비교 분석함으로서 국내 건설현장에서의 품질경영 활동의 확산과 ISO 관련업계와 단체에서의 효율적인 활용에 도움이 되고자 한다.

• Proceedings of the Korea Concrete Institute Conference
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• 1996.10a
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• pp.64-69
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• 1996

As Waste-concretes generated in construction field are increasing, it is becoming difficult and expensive to dispose them. For environmental reasons, many attempts have been made to find ways of reusing these materials. However, very little waste-concrete is currently recycled or reused anywhere on the world. Recycled concrete is mainly used as nonstabilized base of sub-base in highway construction. In this study, in order to promote the reuse of the waste-concretes, no-fines concrete blocks using recycled concrete aggregates were produced and their properties are evaluated. From the test results about strengths, pemeability, and durability, it is known that to use recycled aggregates for construction goods is promising and economical.