• Proceedings of the Korea Multimedia Society Conference
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• 2012.05a
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• pp.238-241
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• 2012

모든 기록매체의 장기보존성과 신뢰성은 보존에 있어 중요한 요소 중 하나이다. DVD 광기록매체 또한 신뢰성을 평가하기 위한 다양한 국제표준 및 연구가 진행되었다. 국가기록원은 각급 기관에서 생산되어 이관된 다양한 종류의 DVD 광매체를 보존하고 있으며, 이에 대한 상태평가를 위해 선행된 표준 및 연구 내용을 바탕으로 이관된 광매체에 대한 상태를 측정을 하였다. 본 연구에서는 이관된 DVD 매체에 대한 평가 기준을 8개의 연속된 ECC블럭의 PI 에러값을 사용하였다. 측정된 PI 에러 값은 생산년도, 제조회사, 에러 발생 위치로 분류하였으며 시간에 따른 열화 정도, 기록 품질 그리고 에러 발생 위치에 따른 매체 상태와의 연관성을 연구하였다.

• 한국문화재보존과학회:학술대회논문집
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• 2005.11a
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• pp.200-206
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• 2005

보존 처리된 유물은 경기도 하남시의 발굴현장에서 수습된 도토기로, 박물관의 소장유물로써 지역사(地域史)의 한 단면을 보여줄 수 있는 자료로 활용 가능성이 있을 것으로 판단되었고, 유물의 상태를 고려한 보존처리작업이 계획되었다. 보존처리작업은 가역성(可逆性)과 경제성에 중점을 두어, 박물관에서 이미 책정된 보존처리예산의 한도 내에서 선택할 수 있는 알맞은 약품과 재료를 선택하여, 복원작업이 필요한 부위 역시 추후 재처리작업이 필요할 때 해체가 용이한 기법을 이용하였다.

• 한국문화재보존과학회:학술대회논문집
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• 2002.11a
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• pp.31-40
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• 2002

1. 프랑스의 문화재보존과 복원 연구소 조직 현황소개 2. ARC-NUCLEART연구소 소개-연구소에서 문화재 보존을 위해서 사용 기술소개 - 지상과 해양의 고고학 발굴시 젖은 목재와 가죽작품 건조작업, 강화작 업, 보수작업 수행 -목재문화재 (조각상, 가구, 사적 바닥마루), 멸균 및 강화처리 - 가죽문화재의 복원 3. 연구소 시설 4. 화재 자질의 파손상태파악과 고고학가치의 목재와 가죽작품 보존 방법에 대한 연구 수행 5. ARC-NUCLEART에서 보존, 복원하는 문화재의 처리 용례 아크 뉘클레아르(ARC Nucleart)의 감마선조사기 설치

• Journal of Conservation Science
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• v.26 no.1
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• pp.33-41
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• 2010

The archival objects are tangible evidence reflecting public work as forming archives which are administrative, historic, symbolic, cultural and artistic value. They are produced from the various countries so that they have different material and manufacture techniques. However there are difficulties in conservation and management because the material investigation and conservation management system are not established. Therefore this research presents fundamental data for the efficient conservation management by material investigation and condition check metal archival objects. Among the public official presents made of metal, 12 pieces which are discoloration, oxidation, loss or crack are chosen for this research. In order to examine extensive condition of metal archival objects, the condition check card used from the domestic museum and the national museum in Japan are collected and then the new check card is produced. X-ray is used to know the making technique, binding means between different material. Portable-XRF is also used for the chemical composition analysis of metal archival objects, and then classifying respectively according to their material. As a result of condition check, it is possible to investgate the appearance character, deteriorated parts and weak parts of structure. Also P-XRF could find out the composition of metal archival objects which is different from existing condition check card. Therefore the research results can be used as fundamental data for further conservation and management as well as long-term conservation.

• Proceedings of the Korean Information Science Society Conference
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• 2006.10b
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• pp.515-520
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• 2006

계량기 숫자 인식은 일반적으로 사용되고 있는 아날로그 계량기에 카메라를 부착하여, 검침 시 숫자 계기판 영상을 전송받고, 그 영상으로부터 숫자를 추출 및 인식하는 기술이다. 계량기 숫자 인식에서는 카메라의 설치 상태 및 기타 환경적인 요인들로 인해 숫자 계기판 영상의 일관성 있는 취득이 어렵게 된다. 본 논문에서는 숫자 인식에 악영향을 미치는, 취득 영상의 상태 변화를 보정해주기 위해 잡영 제거 및 윤곽보존 숫자강화를 제안하였다. 잡영 제거를 위해 잡영을 분포 위치에 따라서 세 가지 타입으로 나누었으며, 각 타입별로 잡영 제거를 하였다. 윤곽보존 숫자강화 과정에서는 일반적인 이진화 기법이 가지는 테두리 정보손실을 최소화할 수 있도록, 숫자 테두리의 명도를 보존하면서 숫자 중심부분의 밝기를 강화시켰다. 전처리 전/후의 인식률 비교 실험을 위해 SVM(Support Vector Machines)을 사용하였으며, 학습 데이터 1,409장과 조명 상태를 달리하여 취득한 1,782의 테스트 데이터를 실험 데이터로 사용하였다. 실험 결과, 81.09%라는 성능 향상을 확인하였으며 이는 제안한 전처리 기법이 조명으로 인한 데이터의 상태 변화 문제를 해결해줌으로써 인식 성능 향상에 크게 기여한다는 것을 입증해준다.

• 한국문화재보존과학회:학술대회논문집
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• 2002.11a
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• pp.69-83
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• 2002

• Journal of Conservation Science
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• v.34 no.3
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• pp.167-177
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• 2018

The Bayon style Avalokitesvara statue from the $13^{th}$ century Angkor period is on display at the Cambodia Angkor Conservation Office. This statue is composed of dark green felthspathic greywacke, the surface of which has been shown light brown discoloration, detected calcite crystallization. As a result of condition assessment, the statue was damaged due to overlap scaling and cracking. Ultrasonic tests have investigated remarkable physical weathering area, flaking and fragmentation in lower velocity. The physical condition of the statue requires a conservation method that improves the binding power. To protect against salt weathering and to ensure physical stability, new conservation material composed of mixed ethyl silicate and sandstone powder similar to that composing the statue was created. The material affected by damage was removed and replaced with the new conservation material.

• 보존과학연구
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• s.32
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• pp.171-183
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• 2011

In this study molecular genetic analysis was carried out on 4 human skeletal remains from Osuri, Buyeo. We showed that real-time PCR is the method of the choice to assess the initial number of genuine ancient DNA molecules. Human mitochondrial DNA quantification was accomplished by the real-time PCR for the cytochrome b gene of the mitochondria. Histological results proved to be a good potentiality for biochemical analysis using biomolecule. The level of specimen's preservation state was proved that level of quantitative result was BO-04, BO-01, BO-03, BO-02. Continually, we showed that biochemical and biomolecule results for the level of preservation state were similar. This study will be useful to important material for predicting biochemistry and biology analysis of the ancient bone.

• KSBB Journal
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• v.21 no.4
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• pp.306-311
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• 2006

Cell preservation is indispensable in animal cell culture process and should be established according to the cell characteristics. In this study, we experimented hypothermic preservation of CHO cells that is widely used in pharmaceutical industry to produce therapeutic proteins and established a stable method of preservation. The highest viability of CHO cells was obtained when the cells were preserved using rolling tube, which means the cells should be suspended to avoid the cell lumping during the preservation. Also, we obtained superior preservation result under the anaerobic condition. To evaluate the serum-free media as a preservation solution, we investigated cell growth after hypothermic preservation using serum-free media. High cell viability and normal cell growth was observed during 10 days using serum-free media. Moreover, we found that more effective preservation when ${\alpha}$-tocopherol and retinoic acid is added to media as an additive. In the case of 1 liter large scale hypothermic preservation using established protocol, cell viability and growth rate was obtained as good as small scale one. This study is considered to be helpful for hypothermic preservation of CHO cells and large scale hypothermic preservation may be available through the further studies.

• 보존과학연구
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• s.34
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• pp.64-81
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• 2013

It is not easy to define the priority criteria of the need of conservation treatment for stone cultural heritage, although many of them have been treated and restored over the past decade. This study approached the correlation between damage grade and the need of conservation treatment based on damage diagnosis of stone cultural heritage carried out from 2001 to 2005. The number of Third-graded (from First to Fifth-grade) stone heritage in deterioration was the highest among state-designated stone cultural heritage. The Fourth-graded stone cultural heritage (143 in total) was mostly influenced by high physiochemical deterioration, whereas the Fifth-graded ones (61 in total) was dominantly affected by biological colonization. It was estimated that total 211 stone cultural heritage were treated for conservation and restoration from 2002 to 2011. They were usually cleaned (total 134, 26.1%), joined and consolidated, and maintenance works as shelter construction, drainage installation and surrounding cleaning were carried out for some of them. The number of conservation intervention increased with the high deterioration grade, and the case number of metamorphic and sedimentary rocks. By age, the stone cultural heritage in Three-kingdom Period were treated the most, and other heritage in Unified Shilla, Goryeo and Joseon showed an approximate ratio. The stone cultural heritage fallen in the fifth-grade in deterioration demonstrated the highest ratio, approximately 80% of conservation intervention. These results can be used as preliminary data to define the emergency criteria for conservation intervention policy.