• Proceedings of the Korean Radioactive Waste Society Conference
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• 2004.06a
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• pp.199-207
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• 2004

In order to develop a safe geological disposal concept for the HLW from the nuclear power plants in Korea, it is necessary to evaluate the safety of the disposal concept in an underground research tunnel in the same geological formation as the host rock mass. The design concept of a research tunnel depends on the actual disposal concept, repository geometry, experiments to be carried at the tunnel, and geological conditions. In this study, geological investigation had been carried out to develop the basic design of the small scale underground disposal research tunnel in KAERI.

• Proceedings of the KAIS Fall Conference
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• 2009.12a
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• pp.53-56
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• 2009

본 연구는 생태면적률을 교육시설에 적용하기 위한 프로세스 개선에 관한 연구로 수행되었다. 생태면적률은 최근 시행되기 시작한 개발사업에 대한 환경지표로 생태환경보전에 매우 중요한 역할을 담당할 것으로 전망되고 있다. 본 연구에서는 관련 선행연구 및 제도, 기준고찰을 통하여 생태면적률에 관한 국내외의 동향을 파악하고, 교육시설에 생태면적률을 적용하기 위한 실태파악을 위하여 일차적으로 중부권 C시의 초등학교를 중심으로 적용된 대지 및 체육장 면적분포, 교지 대비 체육장 비율, 조경면적, 친환경 인증 등에 관한 현황조사를 수행하였다. 본 연구의 실태조사 결과를 통하여 교육시설의 부지조성 특성에 따른 부지유형을 도출하였고, 부지유형별 생태면적률 적용 프로세스를 제안하고, 제도적 적용을 검토하기 위하여 공공부문의 도시 건축 및 환경분야 종사자 및 건축사의 생태면적률에 관한 인지도를 알아보기 위한 설문을 수행하였다. 본 연구의 결과 교육시설의 계획특성에 부합되는 생태면적률 적용 프로세스를 제안하였다.

• Research in Plant Disease
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• v.10 no.2
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• pp.94-99
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• 2004

'Shiranuhi' citrus cultivar bred by crossing 'Kiyomi' tangor and 'Nakano No.3' ponkan is cultivated in polyethylene film house, and the number of cultivating farmers is rapidly increasing in recent years. Recently, some diseases are taking place on 'Shiranuhi' fruit in some orchards, and were to be big problem in some case. It was surveyed that six diseases were mainly taken place in 'Shiranuhi' cultivating orchards in Jeju Island. They were Phytophthora citrophthora, Alternaria sp., Penicillium digitatum, Botrytis cinerea, Diaporthe citri and Xanthomonas axonopodis pv. citri.

• Journal of Soil and Groundwater Environment
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• v.12 no.1
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• pp.44-52
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• 2007

This study reviewed the overall process of application of contaminant fate and transport model as part of risk assessment. Site characterization and establishment of a conceptual model prior to establishing or selecting a appropriate model were described. Types of models, model selection guidance, and generic site conditions for model application were presented, the process of model calibration, validation, and sensitivity analysis were reviewed. Objectives of modeling should be defined before model selection, and the complexity of selected models should balance the quantity and quality of available input data with the desired model output. If model output is highly sensitive to an assumed or default value of input parameter, or fate and transport models cannot be adequately calibrated or validated, consideration should be given to other options such as using measured data or using another model.

• Journal of the Earthquake Engineering Society of Korea
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• v.13 no.1
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• pp.1-8
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• 2009

In order to evaluate the effect of shear wave velocity of a seismic control point on site response analysis, one-dimensional equivalent linear site response analysis were performed on the model soil profile based on the results of a detailed site investigation of sedimentary layers at Incheon and Busan. The results of the analysis show that an increase of shear wave velocity on the seismic control point (base rock) results in an increase of acceleration in the soil layers. This was mainly due to an unclear definition of the seismic control point. For this reason, the Korean Seismic Design Standard requires a specific definition of the seismic control point, including spatial conditions and soil properties, similar to the MCE (Maximum Considered Earthquake) in FEMA 369.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2004.04a
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• pp.5-11
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• 2004

The objectives of this study is to find problems in the legal and institutional background on our information system for soil contaminated sites. To achieve this abjective, we compared our system with those of federal and New Jersey state governments of the United States. We found that we have no comprehensive guideline on how various information from the contaminated sites should be manipulated. In our system, some regulations on information management were found only in a few prescriptions on detection, detailed investigation, and remediation phases. However, we found that provisions, detailed procedures, and related guidelines for the information management are provided in tile case of the federal and New Jersey state governments. Also, public involvement and disclosure of tile information for the remediation procedure are designated in their legal systems.

• Journal of the Korean Geotechnical Society
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• v.38 no.10
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• pp.49-60
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• 2022

Underground urbanization appears to be a promising solution in response to the shortage of construction sites in the above-ground space. In this context, an accurate evaluation of a construction site ensures the long-term performance of geosystems. This study characterizes potential sites for complex plants built in underground space using geophysical methods (i.e., seismic refraction exploration and electrical resistivity survey) and in situ tests (i.e., standard penetration tests (SPTs) and downhole tests). SPTs are conducted in nine boreholes BH-1-BH-9 to estimate the groundwater level and vertical distribution of geological structures. The seismic refraction method enables us to obtain the elastic wave velocity and thickness of each soil layer for each cross-sectional area. An electrical resistivity survey conducted using the dipole array method provides the electrical resistivity profiles of the cross-sectional area. Data obtained using geophysical techniques are used to assess the classification of the soil layer and bedrock, particularly the fracture zone. This study suggests that geotechnical information using in situ tests and geophysical methods are useful references to design an underground complex plant construction.

• Journal of the Korean Geotechnical Society
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• v.25 no.1
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• pp.5-19
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• 2009

Most of earthquake-induced geotechnical hazards have been caused by the site effects relating to the amplification of ground motion, which is strongly influenced by the local geologic conditions such as soil thickness or bedrock depth and soil stiffness. In this study, an integrated GIS-based information system for geotechnical data, called geotechnical information system (GTIS), was constructed to establish a regional counterplan against earthquake-induced hazards at an urban area of Daejeon, which is represented as a hub of research and development in Korea. To build the GTIS for the area concerned, pre-existing geotechnical data collections were performed across the extended area including the study area and site visits were additionally carried out to acquire surface geo-knowledge data. For practical application of the GTIS used to estimate the site effects at the area concerned, seismic zoning map of the site period was created and presented as regional synthetic strategy for earthquake-induced hazards prediction. In addition, seismic zonation for site classification according to the spatial distribution of the site period was also performed to determine the site amplification coefficients for seismic design and seismic performance evaluation at any site in the study area. Based on this case study on seismic zonations in Daejeon, it was verified that the GIS-based GTIS was very useful for the regional prediction of seismic hazards and also the decision support for seismic hazard mitigation.

• Journal of the Korean Geotechnical Society
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• v.17 no.6
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• pp.69-83
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• 2001

In order to make use of finished municipal landfill as a construction site, it is necessary to consider environmental and geotechnical aspects for the ground improvement and application of waste landfill. In environmental aspect, methods for management of landfill gas and leachate have to be established, and in geotechnical aspect, it is necessary to investigate available method for constructing structure foundation. In this study, the finished landfill was selected for pilot test. Investigation about the environmental characteristics of the waste landfill was performed to establish the methods far management of landfill gas according to monitoring the gas quantity and to investigate economical efficiency according to utilizing landfill gas. Investigation about cases of utilizing the waste landfill in Korea and abroad as construction site was performed and pilot tests were performed to analyze the improvement effects of methods such as dynamic compaction method and PG pile method available to waste landfill. The results of this study showed that economical profits could be gained by utilizing landfill gas and improved waste landfill, besides, dynamic compaction method was effective in case of improvement depth being shallow, and PG pile method was effective in case of improvement depth being deep.

• 월간낙농육우
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• v.29 no.7
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• pp.158-161
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• 2009

옥산목장은 자연순환형 낙동기반이 탄탄한 곳이다. 3만평의 조사료를 확보해 목장에서 밸생하는 가축분뇨를 전부 퇴비화해 환원하고 있으며 목장에서 발생하는 오수도 충분히 정화될 수 있는 시설을 갖췄다. 넓은 조사료포를 제 때 가꾸기 위해서는 관련 농기계도 확보해야 하고, 축분처리와 오수정화를 위한 설비 구축도 해야한다. 뿐만 아니라 목장을 경영하는 두 부부의 꾸준한 노력과 부지럼함도 담보돼야 한다.