• 시스템엔지니어링학술지
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• 제16권2호
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• pp.141-147
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• 2020

Due to the nature of the long-term project of a Railway business, Many problems have been arisen in the process of delivering products or systems verified by suppliers to the customer's operation site. Unexpectedly, it is often necessary for the verified products to store intermediately at the supplier's site for a variety of reasons, such as delays in business and delays in civil engineering, at the time of sending them to the customer's operation site. In this study, the intermediate storage process for finding and solving problems related to intermediate storage was presented focusing on the Rolling Stock of Railway System by reference to ISO/IEC/IEEE 15288:2015. A suitable intermediate storage process based on the developed product or system's characteristics will allow the verified products or systems to be placed on the customer's operation site and to meet the customer's product or system requirements.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1992년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 19-21 Oct. 1992
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• pp.303-308
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• 1992

In this study, we propose a shared storage system which is more efficient policy than MIS(Mixed Intermediate Storage) policy for relatively rare storage system and can be called CIS(Common Intermediate Storage) policy. Using this strategy, we develop a new completion time algorithm and apply it to two kinds of optimal or near optimal scheduling method; combinatorial search and simulated annealing method. We also extend this strategy to other storage policy, for example MIS policy, with PLC(Programmable Logic Controller) logic and on/off action of electronic valves. It thus can be accepted as a basic form of FMS(Flexible Manufacturing System) for operating various storage policies. Finally we suggest the interlocking block to compansate for the shortcoming of CIS policy, i.e, complication of operation and safety, resulting in a basic batch process automation mode.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1995년도 Proceedings of the Korea Automation Control Conference, 10th (KACC); Seoul, Korea; 23-25 Oct. 1995
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• pp.319-322
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• 1995

As a trend toward multi-product batch processes is increasing in Chemical Process Industry (CPI), multi-product batch scheduling has been actively studied. But the optimal production scheduling problems for multi-product batch processes are known as NP-complete. Recently Ku and Karimi [5] have studied Simulated Annealing(SA) and Jung et al.[6] have developed Modified Simulated Annealing (MSA) method which was composed of two stage search algorithms for scheduling of batch processes with UIS and NIS. Jung et al.[9] also have studied the Common Intermediate Storage(CIS) policy which have accepted as a high efficient intermediate storage policy. It can be also applied to pipeless mobile intermediate storage pacilities. In spite of these above researches, there have been no contribution of scheduling of CIS policy for chemical batch processes. In this paper, we have developed another MSA for scheduling chemical batch processes with searching the suitable control parameters for CIS policy and have tested the this algorithm with randomly generated various scheduling problems. From these tests, MSA is outperformed to general SA for CIS batch process system.

• 산업경영시스템학회지
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• 제36권3호
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• pp.133-141
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• 2013

The revitalization of e-business via Internet brings big changes to the postal business, and leads to a tremendous increase of heavy and large sized postal mails with continuing growth of home delivery business. Thus, even though the number of intermediate storages for mail delivery that mailmen use for picking up mails in the middle of mail delivery has been being increased, it has still many problems such as insufficient number and size of the storages as well as avoidance of mail keeping of trust agents. It is necessary that safety of mail keeping, seamless mail delivery, and individual parcel pick-up process reestablishment should be made through an improved counter plan for the problems described previously. This study presents the efficient and right operational plan for the intermediate storage for mail delivery with providing the number and size of intermediate storages per mail delivery sequence according to four different types of post offices.

• 한국식품과학회지
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• 제16권3호
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• pp.341-347
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• 1984

과립혼입 오렌지 쥬우스용 오렌지 과립을 대량 으로 1차 가공하여 중간제품으로 저장하면서 필요시에 완제품으로 제조할 수 있는 방안을 모색하기 위하여 오렌지 과립의 열처리 조건 및 포장방법별 저장중 품질변화와 완제품 제조에 따른 저장제품의 가공적성을 확인한 결과 5개월 이상 안전저장이 가능하였으며 포장후 살균공정과 고온충진공정에서의 가공방법별 차이는 없었고 포장방법에 따른 차이는 있어 관포장이 가장 좋았고 3겹파우치포장, 2 겹파우치포장 순이었다. 또한 쎄그먼트로 가공 저장하는 것이 과립으로 저장하는 것보다 우수하었으며 2겹파우치 포장을 제외한 모든 처리구에서 대조구(과립 저장초기에 가공한 과립혼입 쥬우스 완제품)보다 관능검사 결과가 좋게 나타나서 중간제품으로 저장하였다가 제조한 완제품이 품질면에서 더 좋다는 것을 확인하였다.

• 방사성폐기물학회지
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• 제20권3호
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• pp.365-369
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• 2022

Operating and decommissioning nuclear power plants generates radioactive waste. This radioactive waste can be categorized into several different levels, for example, low, intermediate, and high, according to the regulations. Currently, low and intermediate-level waste are stored in conventional 200-liter drums to be disposed. However, in Korea, the disposal of intermediate-level radioactive waste is virtually impossible as there are no available facilities. Furthermore, large-sized intermediate-level radioactive waste, such as reactor internals from decommissioning, need to be segmented into smaller sizes so they can be adequately stored in the conventional drums. This segmentation process requires additional costs and also produces secondary waste. Therefore, this paper suggests repurposing the no-longer-used spent nuclear fuel casks. The casks are larger in size than the conventional drums, thus requiring less segmentation of waste. Furthermore, the safety requirements of the spent nuclear fuel casks are severer than those of the drums. Hence, repurposed spent nuclear fuel casks could better address potential risks such as dropping, submerging, or a fire. In addition, the spent nuclear fuel casks need to be disposed in compliance with the regulations for low level radioactive waste. This cost may be avoided by repurposing the casks.

• Food Quality and Culture
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• 제3권2호
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• pp.89-93
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• 2009

This study was conducted to investigate the effects of herbs (dill weed, fennel seed and rosemary) on color stability and lipid oxidation of ground pork patties during storage at $2^{\circ}C$ and $-20^{\circ}C$. Lipid oxidation was determined by the thiobarbituric acid reactive substances (TBARS) method. Fennel seed was identified as being the most effective ingredient in terms of meat redness (Hunter a-values) during storage at $2^{\circ}C$ (p<0.05). Patties treated with rosemary had lower Hunter a-values than control, and dill weed was the least beneficial in influencing meat redness, having significantly lower a-values than control patties. During frozen storage at $-20^{\circ}C$, no significant differences in a-values were observed between the control patties and those treated with fennel seed. Patties treated with rosemary had lower a-values than control and patties with dill weed had negative a-values throughout storage. The cooking process increased Hunter L-values and decreased a-values in all patty samples. TBARS values increased during storage. Rosemary displayed excellent antioxidative activity as evidenced by the completely inhibition of TBARS formation of cooked pork patties. Dill weed and fennel seed also exerted an intermediate but significant antioxidant effect during storage (p<0.05).

• 한국압력기기공학회 논문집
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• 제16권1호
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• pp.110-116
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• 2020

As the management plan for domestic spent nuclear fuel is delayed, the storage of the operating nuclear power plant is approaching saturation, and the Kori 1 Unit that has reached its end of operation life is preparing for the dismantling plan. The first stage of dismantling is the transfer of spent nuclear fuel stored in storage at plants. The spent fuel management process leads to temporary storage, interim storage, reprocessing and permanent disposal. In this paper, the technical issues to be considered when transporting spent fuel in this process are summarized. The spent fuels are treated as high-level radioactive waste and strictly managed according to international regulations. A series of integrity tests are performed to demonstrate that spent fuel can be safely stored for decades in a dry environment before being transferred to an intermediate storage facility. The safety of spent fuel transport container must be demonstrated under normal transport conditions and virtual accident conditions. IAEA international standards are commonly applied to the design of transport containers, licensing regulations and transport regulations worldwide. In addition, each country operates a physical protection system to reduce and respond to the threat of radioactive terrorism.

• 방사성폐기물학회지
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• 제5권4호
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• pp.351-357
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• 2007

일본 정부는 사용후핵연료의 중간저장시설의 입지로 아우모리현의 무쯔시를 선정했다. 2000년부터 시작된 유치활동이 5 년만에 결실을 맺은 것이다. 한국은 사용후핵연료를 원자력 발전소 내에 저장하고 있는데 2016년이면 저장한계에 이를 것으로 전망되고 있어 일본의 사례연구는 한국에 시사하는 바가 크다. 한국은 경주에 중, 저준위 방사성 폐기물 저장시설을 성공적으로 유치한 경험이 있어 사용후핵연료의 저장시설을 유치하는 학습경험을 축적한 바 있는데 두 나라의 큰 차이점은 한국은 경쟁적인 주민투표를 통하면서 막대한 지역지원금을 지원한다는 점이고 일본은 주민투표를 시행하지 않고 지방자치 정치의 리더쉽이 문제를 해결하는 방식을 택했다는 점이다. 엄청난 지역지원금이 지원되지 않은 점도 일본의 특징이다. 본 연구가 한국의 사용후핵 연료 저장시설을 유치하는 데 도움이 되었으면 하는 바람이다.

• 한국식품영양학회지
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• 제17권2호
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• pp.193-198
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• 2004

본 연구는 저장 중 연화 다시마의 연화 안정성을 검토하여 다시마 다시마 가공품의 중간소재를 개발하기 위하여 수행하였다. 본 연구에서는 초산과 가열하여 연화시킨 다시마의 유연조직을 유지하기 위하여 친수성이 강한 연화제를 사용하여 경시적인 연화 안정성을Avrami equation 색깔 및 관능성 등의 변화를 검토하였다. 그 결과 4일간 저장할 경우 ln( $E_{L}$- Et) vs t와의 관계에서 isomalto oligosaccharide의 기울기가 가장 낮은 값을 나타내었으며 log(- ln( $E_{L}$- Et)/( $E_{L}$- $E_{O}$) vs log t의 관계에서도 Avrami equation의 exponent n는 1.00-1.67 범위에 있고 isomalto oligosaccharide의 exponent n는 1.00으로 가장 연화 안정 효과가 큰 것으로 나타났다. Rate constant는 isomalto oligosaccharide가 가장 낮은 값을 나타내어 경시적으로 연화가 천천히 진행됨을 알 수 있었다. 연화제를 사용한 경우 연화 다시마의 명도(L), 적색도(a), 황색도(b)는 대부분 감소하는 경향을 나타내었다. 관능성의 경우 색깔 선호도, 냄새, 가공적합성, 점조성, 연화 정도 및 전체 기호도 등은 isomalto oligosaccharide를 사용한 경우가 가장 좋은 것으로 나타났다. 결론적으로 연화 다시마를 연화제로 처리하면 중간소재로서의 가치와 저장성, 관능적 가치가 좋은 것으로 나타났으며 특히 isomalto oligosaccharide를 사용하는 것이 좋은 것으로 나타났다. 나타났다.다.