• 한국방사성폐기물학회:학술대회논문집
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• 한국방사성폐기물학회 2004년도 Proceedings of the 4th Korea-China Joint Workshop on Nuclear Waste Management
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• pp.51-59
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• 2004

The geological research as a part of HLW disposal program in Korea is carried out to provide necessary data for the establishment of the reference repository system in term of design and safety assessment in the crystalline rock terrains. Six deep boreholes were drilled to obtain hydrogeological and hydrochemical data from Jurassic granites in the Yuseong area, Korea. The core observation, televiewer logging and hydraulic testing were carried out during and after drilling and multi-packer system were installed in the boreholes of 500m depth for hydraulic and hydrochemical monitoring including environmental isotopes. The integration of hydrogeochemical and hydrodynamic data would be built greater confidence for the understanding of groundwater system in fractured rock mass. This geoscientific program could be possible to suggest a general guideline to develop the reference disposal concept of high-level radioactive waste in Korea.

• 한국문헌정보학회지
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• 제53권3호
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• pp.317-344
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• 2019

데이터의 가치 증대, 연구 방법의 패러다임 변화 그리고 오픈 사이언스 등의 구체적 발현은 연구가 더 이상 기존의 학술지와 같은 텍스트 중심이 아닌 데이터 기반으로 전환되고 있음을 나타내고 있다. 본 연구에서는 아직 국내 연구가 미흡한 연구 데이터 관리 및 서비스를 위한 핵심요소와 해당 기능적 요건을 도출하기 위하여 DCC, ICPSR, ANDS 그리고 DataONE에 대한 서비스를 분석하였다. 분석 결과 도출된 핵심 요소는 'DMP 작성지원', '데이터 기술', '데이터 저장', '데이터 공유 및 접근', '데이터 인용' 그리고 '데이터 관리 교육' 등이다. 또한 도출된 핵심 요소에 기능적 요건을 제시함으로써 향후 실질적으로 RDM 서비스를 구축 및 운영하고자 할 때 본 연구의 내용을 적용할 수 있을 것이다.

• 산업공학
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• 제23권3호
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• pp.213-220
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• 2010

As the market becomes increasingly globalized and competition among companies increases in severity, various specialized organizations are participating across the process plant lifecycle, including the stages of design, construction, operation and maintenance, and dismantlement, in order to ensure efficiency and elevate competitiveness. In this regard, it is an important technical issue to develop services or information systems for sharing process plant data among participating organizations. ISO 15926 is an international standard for integration of lifecycle data for process plants including oil and gas facilities. ISO 15926 Part 7, a part of the ISO 15926 standard, specifies an implementation method called a facade that uses Web Services and ontology technologies for constructing plant data repositories and related services, with the aim of sharing lifecycle data of process plants. This paper discusses the ISO 15926-based prototype facade implemented for storing equipment data of nuclear power plants and servicing the data to interested organizations.

• International Journal of Knowledge Content Development & Technology
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• 제9권4호
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• pp.31-45
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• 2019

In this study, a database was established by analyzing the record data research produced in ice hockey sports. The deployed data verification with Ice hockey reference service was demonstrated with ice hockey officials and players. This research utilized the data stored in the KNSU Datanest data repository and developed PDF parsers for batch processing of records. Among the types of records, the game summary, team roster, team statistics, and player statistics files were collected, and tables were extracted from the records. PDF records were converted to text in CSV format which are converted to DataFrame and loaded into the database. Out of the total 22 types of records, 4 types were constructed with OO data parsed as element values. Data verification has found no problems with the quality of the data deployed, showing a high satisfaction with providing 66 factors against the 30 factors provided by the service previously used.

• 지식경영연구
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• 제18권4호
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• pp.287-306
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• 2017

This research focus on the effect of developers' participation structure in knowledge creation and knowledge sharing activities in open source software development projects. Based on preferential selection theory, hypotheses of relationship between a developers' concentration of knowledge creation/sharing activities and collaboration performance was derived. To verify the hypotheses, we use the Gini coefficient in the commit contribution of the developers (knowledge creation) and the centralization index in the repository issue network (knowledge sharing network). Using social network analysis, this paper calculates centralization index from developers in the issue boards in each repository based on data from 837 repositories in GitHub, a leading open source software development platform. As a result, instead of all developers creating and sharing knowledge equally, only a few of developers creating and sharing knowledge intensively further improve the performance of the open collaboration. In other words, a few developers predominantly providing commit and actively responding to issues raised from other developers enhance the project performance. The results of this study are expected to be used by developers who manage open source software project as a governance strategy, which could improve the performance of open collaboration.

• Journal of Nuclear Fuel Cycle and Waste Technology
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• 제1권1호
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• pp.9-27
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• 2013

Nagra was established in 1972 by the Swiss nuclear power plant operators and the Federal Government to implement permanent and safe disposal of all types of radioactive waste generated in Switzerland. The Swiss Nuclear Energy Act specifies that these shall be disposed of in deep geological repositories. A number of different geological formations and sites have been investigated to date and an extended database of geological characteristics as well as data and state-of-the-art methodologies required for the evaluation of the long-term safety of repository systems have been developed. The research, development, and demonstration activities are further supported by the two underground research facilities operating in Switzerland, the Grimsel Test Site and the Mont Terri Project, along with very active collaboration of Nagra with national and international partners. A new site selection process was approved by the Federal Government in 2008 and is ongoing. This process is driven by the long-term safety and feasibility of the geological repositories and is based on a step-wise decision-making approach with a strong participatory component from the affected communities and regions. In this paper a brief history and the current status of the Swiss radioactive waste management program are presented and special characteristics that may be useful beyond the Swiss program are highlighted and discussed.

• Geomechanics and Engineering
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• 제22권5호
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• pp.375-384
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• 2020

In this study, the application of conventional cubic law to a deep depth condition was experimentally evaluated. Moreover, a modified equation for estimating the rock permeability at a deep depth was suggested using precise hydraulic tests and an effect analysis according to the vertical stress, pore water pressure and fracture roughness. The experimental apparatus which enabled the generation of high pore water pressure (< 10 MPa) and vertical stress (< 20 MPa) was manufactured, and the surface roughness of a cylindrical rock sample was quantitatively analyzed by means of 3D (three-dimensional) laser scanning. Experimental data of the injected pore water pressure and outflow rate obtained through the hydraulic test were applied to the cubic law equation, which was used to estimate the permeability of rock fracture. The rock permeability was estimated under various pressure (vertical stress and pore water pressure) and geometry (roughness) conditions. Finally, an empirical formula was proposed by considering nonlinear flow behavior; the formula can be applied to evaluations of changes of rock permeability levels in deep underground facility such as nuclear waste disposal repository with high vertical stress and pore water pressure levels.

• Nuclear Engineering and Technology
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• 제34권4호
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• pp.406-414
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• 2002

In TSPA of long-term post closure radiological safety on permanent disposal of HLW in Korea, appropriate management of input and output data through QA is necessary. The robust QA system is developed using the T2R3 principles applicable for five major steps in R&D＇s. The proposed system is implemented in the web-based system so that all participants in TSPA are able to access the system. In addition, the internet based input database for TSPA is developed. Currently data from literature surveys, domestic laboratory and field experiments as well as expert elicitation are applied for TSPA.

• 한국지반공학회논문집
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• 제33권7호
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• pp.55-64
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• 2017

심층 처분방식은 고준위폐기물을 처분하기 위한 가장 적합한 대안으로 고려되어지고 있다. 심층 처분시설은 지하 500~1,000m 깊이의 암반층에 설치되며 심층 처분시스템의 구성 요소로는 처분용기, 완충재, 뒷채움 및 근계 암반이 있다. 이 중 완충재는 심층 처분시스템에 있어 매우 중요한 역할을 한다. 완충재는 지하수 유입으로부터 처분용기를 보호하고, 방사성 핵종 유출을 저지한다. 처분용기에서 발생하는 고온의 열량이 완충재로 전파되기에 완충재의 열적 성능은 처분시스템의 안정성 평가에 매우 중요하다고 할 수 있다. 따라서 본 연구에서는 국내 경주산 압축 벤토나이트 완충재에 대한 열전도도 추정 모델을 개발하고자 하였다. 압축 벤토나이트 완충재의 열전도도는 비정상 열선법을 이용하여 다양한 함수비와 건조밀도에 따라 측정하였으며, 총 39개의 실험 데이터를 토대로 회귀분석을 이용하여 경주 압축 벤토나이트의 열전도도 추정 모델을 제시하였다.

• 지능정보연구
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• 제13권2호
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• pp.1-14
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• 2007

사례기반추론은 다양한 예측 문제에 있어서 성공적으로 활용되고 있는 데이터 마이닝 기법 중 하나이다. 사례기반추론 시스템의 예측 성능은 예측에 사용되는 최근접 이웃 집합을 어떻게 구성하느냐에 따라 영향을 받게 된다. 최근접 이웃 집합의 구성에 있어서 대부분의 선행 연구들은 고정된 값인 K개의 사례를 포함시키는 k-NN 방법을 채택해왔다. 그러나 k-NN 방법을 채택하는 사례기반추론 시스템은 k 값을 너무 크게 혹은 작게 설정하게 되면 예측 성능이 저하된다. 본 연구에서는 이러한 문제를 해결하기 위해 최근접 이웃 집합을 구성함에 있어서 유사도의 임계치 자체를 이용하는 s-NN 방법을 제안하였다. UCI의 Machine Learning Repository에서 제공하는 데이터를 사용하여 실험한 결과, s-NN 방법을 적용한 사례기반추론 모델이 k-NN 방법을 적용한 사례기반추론 모델보다 더 우수한 성능을 보여주었다.