• Journal of Korean Ophthalmic Optics Society
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• v.16 no.2
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• pp.135-145
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• 2011

Purpose: This study was conducted to investigate the actual condition of caring soft contact lens cases and the change in contamination level of lens cases by wearing and storage period of soft contact lens. Methods: The actual condition of caring soft lens cases was surveyed with sixty-three of contact lens wearers. Soft contact lenses were worn for 1, 3, 7 and 14 days, and the lenses were separately stored in 12 lens cases for 1, 3 and 7 days. The contamination level of lens cases was determined by counting the numbers of microorganisms, gram negative bacteria and fungi. Results: Only 14% of survey answerers cleaned their lens cases with a brush, rinsed and dried them upside down before next usage of lens case when those lenses were kept for a long time. Furthermore, 54% of total answerers just kept soft contact lens in the case without changing the multipurpose solution. Microorganisms, gram negative bacteria and fungi were detected in lens cases even when soft contact lens were kept for 1 day in the lens case after wearing for 1 day and cleaning it with multipurpose solution. The numbers of microorganisms, gram negative bacteria and fungi in lens cases increased with storage periods of soft contact lens, and also contamination level of lens cases was increased in accordance with wearing period of lens. In the lens cases without changing multipurpose solution, the numbers of microorganisms, gram negative bacteria and fungi increased with storage period of lens with statistical significance. Conclusions: This study showed that lens wearers' concerns on caring contact lens case were not satisfactory. As the result, the contamination of lens cases was related to increase of lens wearing and storage periods suggesting that the proper instruction and education for lens wearers are required.

• 한국IT서비스학회:학술대회논문집
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• 2010.05a
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• pp.95-99
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• 2010

다양한 업무 환경에서 발생한 문서를 공인전자문서보관소에 보관하여 필요시에 해당 전자문서 혹은 증명서를 발급하여 활용하는 방식은 업무처리의 간소화, 검색의 용이성 및 문서보관비용 절감 등의 효과를 기대할 수 있다. 그러나 공인전자문서보관소가 보관 위주 서비스 제공으로 기업의 전자문서 생성 및 유통 업무를 효율적으로 지원하고 있지 못하고 있어 해당 기업이 업무환경에 신뢰기관으로서 공인전자문서보관소를 이용하는 사례가 부족한 실정이다. 본 논문에서는 전자문서 및 공인전자문서보관소 이용의 활성화를 위해 효율적인 전자거래문서 유통방안을 제안하고 이를 지원하기 위해 제3신뢰기관으로서 공인전자문서보관에 추가로 요구되는 기능 요소를 제안한다.

• Korean Journal of Poultry Science
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• v.28 no.3
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• pp.225-229
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• 2001

This experiment was carried out to investigate the effects of storage temperature and time on hatch-ability of the commercial Ross broiler breeder eggs. In Trial 1,720 eggs collected in the morning were allotted to four storage time treatments (3, 5, 7 and 9 days), with three replicates per treatment. The storage temperature was fixed at $4^{\circ}C$. In Trials 2 and 3, similar protocol was used as in Trial 1 except that the storage temperature was fixed at $17^{\circ}C$ and $28^{\circ}C$respectively. In Trial 1, hatchability was significantly (P<0.05) reduced when the eggs were stored more than 3 days. In Trial 2, no significant difference was found among all treatments, indicating that, at 17$^{\circ}C$ storage temperature, the eggs could be stored up to 9 days without reducing hatchability. In Trial 3, however, hatchability of eggs stored for 9 days was significantly reduced compared to the other treatments. In conclusion, we found out that optimum hatchability can be achieved with a storage temperature of $17^{\circ}C$ for Ross broiler eggs stored for up to 9 days.

• Journal of Chest Surgery
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• v.33 no.12
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• pp.929-934
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• 2000

배경: 기관의 동종이식편은 초냉동보관으로 생육성을 유지할 수 있으며 항원성이 줄어든다고 알려졌으나 냉동보관 온도 및 기간에 따른 항원성의 변화는 아직까지 명확히 밝혀져 있지 않다. 따라서 이번 연구에서는 냉동보관 온도의 차이 및 기간이 쥐 기관 동종이식편의 거부반응에 미치는 영향을 연구하였다. 대상 및 방법: 24개의 쥐 기관을 적출하여 12개씩 -8$0^{\circ}C$ 냉동고 및 -196$^{\circ}C$ 질소탱크에 각각 1, 3, 6개월씩 보관하였다. 냉동보관한 기관을 반으로 나누어 48마리의 쥐복강에 대망으로 감싼 다음 이식하였다. 1, 3, 5군은 -8$0^{\circ}C$ 냉동고에 각각 1, 3, 6개월씩 보관한 기관 동종이식편을 이식하였고 2, 4, 6군은 -196$^{\circ}C$ 질소탱크에 각각 1, 3, 6개월씩 보관한 기관 동종이식편을 이식하였다. 7군은 대조군으로 냉동보관하지 않은 동종이식편을 이식하였다. 이식후 14일째 이식된 동종이식편을 적출하여 간질조직의 단세포 침윤정도 및 내강 폐쇄 정도를 관찰하여 거부반응을 정도를 측정하였다. 결과: 7개 군 모두에서 중등도 이상의 심한 단세포 침윤을 보였으며 각군간의 통계학적인 차이를 보이지 않았다. 1, 2, 3, 4, 5, 6군에서 7군에서 보다 내강 폐쇄 정도가 적었으나 통계학적인 의의는 없었다. 모든 군에서 연골주위 단세포 침윤이 심한 경우에도 연골세포는 비교적 생육성을 잘 유지하고 있었다. 결론: 냉동보관 온도 및 보관 기간의 차이에 따른 동종이식편의 거부반응의 차이는 없었으며 모든 군에서 심한 거부반응을 보였다. 따라서 냉동 보관 쥐 동종이식편을 이용한 실험에서는 적절한 면역억제제의 사용이 필수적이라고 생각된다.

• 한국IT서비스학회:학술대회논문집
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• 2009.05a
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• pp.197-200
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• 2009

비즈니스 환경에 전자문서를 활용함으로써 종이 없는 사회를 구현하기 위해 정부는 공인전자문서보관소 제도를 추진하고 있다. 이는 업무처리 과정에서 발생한 전자문서를 공인된 전자문서보관소에 보관하고 필요시에 해당 전자문서 혹은 증명서를 발급하여 활용하는 방식으로 업무처리의 간소화, 검색의 용이성 및 문서보관비용 절감 등의 효과를 기대할 수 있다. 그러나 공인전자문서보관소를 기반으로 하는 다양한 비즈니스 모델이 부족하여 기업이 업무환경에 공인전자문서보관소를 이용하는 사례가 부족한 실정이다. 본 논문에서는 전자문서 및 공인전자문서보관소 이용의 활성화를 위해 이를 기반으로 하는 IT 부가서비스 모델과 이의 적용 사례를 제시하고자 한다.

• Journal of the korean academy of Pediatric Dentistry
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• v.41 no.1
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• pp.1-7
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• 2014

If it is possible to preserve and culture cells from exfoliated deciduous teeth in a readily available storage medium within each family, more stem cells would be obtained. This research is about the effect of storage media and time on pulpal cell viability of exfoliated deciduous teeth. 330 exfoliated deciduous teeth were randomly divided into 11 groups; fresh group, dry group, groups stored in cell culture medium (2, 4, 7 days each), in milk (2, 4, 7 days each), and in saline (2, 4, 7 days each). Primary culture of pulpal cells was conducted in each group and the success rates were compared by calculating the number of teeth with viable cells. The result of primary culture shows that the success rate decreases as the time of storage gets longer. There was no statistical difference between groups stored in the cell culture medium, milk, and saline for 2 and 4 days. However, the groups stored in milk and saline for 7 days showed dramatic decrease in success rate compared to the group stored in the cell culture medium. In conclusion, exfoliated or extracted deciduous teeth can be used to culture pulpal cells when they are stored in milk and saline for a certain period of time; however obtaining viable pulpal cells becomes harder as the storage time gets longer.

• Convergence Security Journal
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• v.11 no.3
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• pp.99-111
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• 2011

The management and deposit of paper document costs are increased gradually. Specially, it is too expensive to safekeeping paper document in the warehouse. Also paper based document system is exposed in several security problems. Therefore, demands of transformation process from paper document into electronic ones are quietly needed. Electronic document repository system is one of the best solutions for solving paper based document system issues. Electronic document repository system can reduce overall costs and provides some advantages in comparison with paper based document system. But, electronic document repository system has no formal methodology for guarantee safeties. Therefore, we suggest a security mechanism for establish electronic document repository system. Suggested security methodology can help for design of more secure electronic document repository system.

• Journal of Korea Port Economic Association
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• v.26 no.4
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• pp.310-328
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• 2010

The purpose of this study is to contribute to reducing distribution costs, enhancing export price competitiveness, and improving distribution system in LCL cargo, by pursuing the present status of warehouse storage fee, a cause & problem about excessive hike, and a plan for stabilizing warehouse storage fee, as for LCL Cargo, which is imported by sea. The plans for rationalizing warehouse storage fee in LCL cargo were suggested the adoption of the ceiling system for warehouse storage fee rate, the obligation of offering information on warehouse storage fee rate, the eradication of illegal rebate, the improvement in distribution system of the imported LCL cargo, a scheme for the importer to designate a bonded warehouse and forwarder, the introduction of the tentatively named 'LORAS(Lowest Rate Service),' and formation of the dispute coordinating committee for warehouse storage fee.

• Convergence Security Journal
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• v.9 no.2
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• pp.23-32
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• 2009

CeDA (Certified e-Document Authority) was adopted in March 2005. It is possible to register/store/send/receive/transfer/revoke e-documents by using trusted third party, CeDA. It is important to store not only e-documents of users but also logs produced by CeDA. Thus all logs must be electronically signed using certificate of CeDA. But management of electronically signed logs is difficult. In this paper, the method which can be applicable to authenticate all logs of CeDA using "Hash Tree" is present.

• Proceedings of the KIEE Conference
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• 2006.10a
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• pp.160-161
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• 2006

본 연구는 살균선 및 오존선을 방사하는 저압 자외선램프를 이용하여 한약재 살균 및 장기간의 보관에 따른 변질 원인을 제거하고, 고품질 유지를 위한 것이다. 본 연구에서는 이미 발표한 오존 및 전기적 특성을 연구한 '오존램프를 이용한 약재 보관 특성(1)'에 이어서, 주로 약재 보관 특성의 관점에서 연구를 하였다. 대구 약전골목에서 현재 가장 많이 사용되고 유통되고 있는 작약, 백출, 왕기, 감초, 당귀를 실험에 이용 하였으며, 오존램프 보관 유무에 따른 약재의 외관상의 변화, 일반성분의 변화, 생리활성 물질의 변화 등 특성 평가를 연구하였다.