• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.8
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• pp.5422-5429
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• 2015

Main idea of this study is applying The HACCP (Hazard Analysis Critical Control Point) system to Confectionery. LB company, located in Gyeryong-si, Chungnam, provided main ingredients of confectionery, work facilities and workers between September 1, 2014 and January 15, 2015. The manufacturing process was made by Referring to the typical manufacturing process of confectionery manufacturers. Based on the microbiological hazard analysis, egg contained $6.2{\times}10^3CFU/g$ of bacteria, which has most amount of bacteria among agricultural materials. However, the Microbiological hazard analysis of the raw materials and after the baking process of confectionery showed a safe result. As a result, the microbiological hazard should be reduced by systematic cleaning, disinfection and improved sanitary education.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.05a
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• pp.580-583
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• 2009

It is very important to minimize the maintenance cost on easy accessibility in the production information system, change of production process line, and system expansion for globalization of logistics and production in the steel and manufacturing. In this paper, we design applying design patterns of object-oriented as well as implement web-based integrated manufacturing management system using JSP for easy accessibility of users and reduction of maintenance cost on business expansion and system integration. In addition, The proposed MES system supports various functionality such as equipment master code management, equipment management, inspection management, repair management, failure management, and statistic management in detail.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.25 no.11
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• pp.1525-1530
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• 2021

By applying AI-based efficient inventory management and logistics optimization technology using the smart factory's production plan and manufacturing data, the company's productivity improvement and customer satisfaction can be expected to increase. In this paper, we proposed a system that collects data from the factory's production process, stores it in the cloud, and uses the manufacturing data stored there to apply AI-based supply chain optimization technology later. While the existing system supported approximately 10 to 20 data types, the proposed system is designed and developed to support more than 100 data types. In addition, in the case of the collection cycle, data can be collected 1-2 times per second, and data collection in TB units is possible. Therefore This system is designed to be applied to the existing factory of past in addition to the smart factory.

• Journal of the Korea Society of Computer and Information
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• v.26 no.1
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• pp.119-125
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• 2021

Companies' efforts to find ways to reduce logistics costs for products and raw materials currently being brought in to produce products in all manufacturing processes are one of the biggest challenges, and the recent global recession has made logistics management even more important. This development technology limits the development of IN/OUT Bound truck logistics and dock management optimization system in the factory, especially by using UHF 900Mhz RFID radio frequency technology.

• Proceedings of the Korean Society of Computer Information Conference
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• 2023.07a
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• pp.669-670
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• 2023

본 논문에서는 열화상 카메라 및 주변 환경요인 측정 시스템을 이용하여 각종 반도체 제조공정에 사용되는 화학물질의 누수를 검출하는 방안을 제안한다. 이는 대형화되고 복잡한 집적배관이 시공되어 있는 공장 환경에서 검출센서를 통한 화학물질 누수 관리를 열화상 시스템으로 대체함으로써 보다 정확하고 안정적인 모니터링을 통해 신속한 대응 및 관리가 가능할 것이다. 또한 본 연구를 통해 누수 배관표면의 열패턴을 실시간으로 모니터링 함으로 기존 누수 검출 센서(면적식 라인타입의 센서)에 대비하여 20% 이상 검출의 신속성 향상을 보장할 수 있다.

• Journal of Korean Society of Occupational and Environmental Hygiene
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• v.25 no.2
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• pp.126-133
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• 2015

연구목적: 이 연구는 노동부의 보건진단 명령에 의해 유리섬유 강화플라스틱(FRP)을 이용한 이중벽 탱크 제조 사업장의 적층 공정 근로자들을 대상으로 스티렌 노출 특성을 평가하기 위해 수행되었다. 연구방법: 스티렌의 주요발생원 파악을 위해 불포화 폴리에스테르 수지(UPR), 경화제, 조색제, 세척액 등의 원료 내 스티렌 함유량을 가스크로마토그래피 질량분석기(GC-MS)를 이용하여 분석하였다. FRP 적층 공정에 근무하는 작업자들을 대상으로 NIOSH 1501 공정시험법에 의해 공기 중 스티렌 노출 농도에 대한 개인노출 평가를 실시하였고, 생물학적 노출 지표로 뇨 중 만델릭산을 채취한 후 고성능액체크로마토그래피(HPLC)로 분석하였다. 또한 각 직무 특성과 단위작업 중심으로 스티렌에 대한 단시간 노출평가를 수행하였다. 연구결과: 스티렌의 함유량이 가장 많은 주요 원료는 중량비율로37%의 스티렌이 함유된 UPR이었다. 적층 공정의 FRP분무 작업자와 보조 작업자들 모두 스티렌의 8시간 가중평균 노출기준(20 ppm)을 초과하였다. 단시간 노출평가 결과 FRP분무 작업자의 경우 45.9 ppm에서 86.1 ppm 수준으로 FRP를 사용하지 않는 작업보다 통계적으로 유의하게 높은 수준이었다(P<0.01). 가장 높은 수준의 스티렌에 노출되는 단위작업은 FRP를 이용하여 1차 코팅 하는 작업으로 특별한 관리가 필요하였다. 결론: 보건진단을 위해 실시한 이중벽 탱크 제조 사업장의FRP 적층 공정 작업자의 스티렌 노출수준은 노출기준을 초과할 정도로 높은 수준이었다. 그러나 탱크를 천장에 매달고 돌리면서 적층작업을 수행하기 때문에 적절한 국소환기 시스템을 구축하는데 어려움이 있다. 따라서 적절한 방독마스크 착용으로 스티렌 노출 예방이 필요하였다.

• Korean Journal of Construction Engineering and Management
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• v.6 no.6 s.28
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• pp.152-159
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• 2005

Since Lean Construction has been introduced as a new management approach to improve productivity in the construction industry, much research is in progress to develop lean concepts and principles for better implementation and to get results of the successful adaptation of lean ideas from manufacturing for application in the construction industry. Currently, Lean Construction Institute developed Last Planner System to achieve better workflow and effective planning management. Domestic construction companies are also getting interested in the Lean Construction. However, there are no detailed guidelines how to implement lean system. Thus, this study will provide a guideline for deployment of last planner system, a prototype lean implementation control checklist, and all project participants roles based on the case studies in USA. This study should provide a framework to apply lean construction to domestic construction sites.

• Journal of Korean Society of Archives and Records Management
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• v.1 no.1
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• pp.177-200
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• 2001

The causes which affects the deterioation of paper arc paper structure, papermaking process, temperature and rative humidity, light and biological agents. Paper made from cllulose fibers by the wood and the nonwood, This paper structure is further hydrolyzed by acidic additive such as the sizing agents during the manufacturing process. These additives leave residual acids in the paper, which break the cellulose clown to simper molecules. The results is weak paper and bas caused most of the damage to book. This study was carried out to investigate the presevation and the deacidification for the permanenece by the book. The deacidification and the chemical agents aims to nutralized the aicd in paper and add alkaline to it as a buffer to withstand future acid attacks. By applying the system to the acid paper with a pH of 4.5 neutralized a pH of 8.5. The expected of alkaline reserved paper extend about 2times and 3times than acidic paper.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.37 no.1C
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• pp.17-23
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• 2012

RFID(Radio Frequency IDentification) is now being applied in the lots of fields as an alternative of barcode system. However, it is restricted within product manufacturing, sales, and delivery parts. In this paper, research results regarding an actual progress of an RFID-based system and its effect are described. In addition, this paper confirms that the RFID-based process of manufacture gives much better return of investment than the barcode-based one. Therefore, the results of this paper are highly expected to contribute to make many people, who might hesitate to replace the barcode and apply RFID system to the process of manufacture, a positive decision.

• Fire Science and Engineering
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• v.26 no.5
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• pp.41-47
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• 2012

As a core process in the manufacture of state-of-the-art industrial technologies such as semiconductor and LCD, a clean room is the most important process which can affect the performance and quality of products drastically. Nevertheless, scientific research on comprehensive safety measures from a fire protection standpoint is not being carried out in Korea. This study aims to derive measures to improve smoke control systems by identifying performance and problems of smoke systems installed in clean rooms as an LCD manufacturing process and analyzing fire and evacuation simulations considering several scenarios. As a result of analysis of fires and smoke in a clean roomas an LCD manufacturing process, it is found to be necessary to stop air handling units through interlocking in case of a fire and exhaust smoke out of the room through the top of FAB in consideration of buoyancy of smoke. It is also found to be necessary to install quick response sprinkler heads and accessories to accelerate the response time, because the heat-accumulating performance of sprinkler heads decreases in this application. Despite its low density of dwelling due to the automation process, clean room is characterized by an array of complex production equipment and working environment requiring dustproof clothes, which makes it difficult to acquire evacuation safety performance. Thus, thorough control of danger factors in processes and periodic education and training are required. It is also necessary to establish a level of domestic technologies equivalent to the level of standards of advanced countries in fire protection.