• Tunnel and Underground Space
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• v.15 no.3 s.56
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• pp.195-212
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• 2005

Surface subsidence which occurs with several reasons, such as collapse of gangway, discharge of groundwater, compaction of weak rock mass, and tunnel excavation in shallow depth, gives rise to a serious problem in national infra-structures. In this study, therefore, the mechanism of subsidence has been examined numerically to overcome the passive approach on subsidence occurrence area. With many kinds of numerical studies, the major geotechnical parameters have been selected and the weighted values have been defined for each parameters. Also the authors developed the numerical program which can estimate the possibility of subsidence occurrence, and proposed the decision method for objective and quantitative guideline. It is anticipated that this research will be helpful to establish the hazard map on subsidence region.

• Proceedings of the Korea Water Resources Association Conference
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• 2016.05a
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• pp.570-570
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• 2016

홍수해석을 위해서는 DEM, 토지피복도, 토양도 등을 이용해서 대상 유역의 수문지형학적 매개변수를 도출해야 한다. 이때 북한과 같은 비접근 지역이나, 지상 관측에 의한 자료가 부족한 해외 지역에 대한 유출해석을 위해서는 대상 지역에 대한 상세한 자료를 얻기 어려우므로, 위성영상이나 전지구 데이터베이스 등과 같은 글로벌 자료를 이용하는 것이 대안이 될 수 있다. 글로벌 지형공간 자료로는 ASTER GDEM과 같은 DEM, Global Map과 같은 토지피복도, HWSD(Harmonized World Soil Database)와 같은 토양도를 이용할 수 있다. 본 연구에서는 이 중 HWSD의 적용성을 평가하였다. HWSD는 UN FAO(Food and Agriculture Organization of the United Nations)의 토지이용변경 프로그램에 따른 지도와 지역 및 국가 토양데이터베이스를 조합해서 만들어 졌으며, 30 arc-second(약 1km)의 해상도를 가진다. 유출해석은 물리적 분포형 모형인 GRM(Grid based Rainfall-runoff Model)을 이용하였으며, 낙동강 수계의 향석 수위관측소 유역을 대상으로 2008년과 2009년에 발생한 2개의 수문사상을 이용하여 연구를 진행하였다. 토양도를 제외한 자료(DEM, 토지피복도 등)는 모두 국내에서 구축된 자료를 이용하였다. 우리나라의 정밀토양도를 이용해서 보정된 모형(매개변수)에 HWSD 자료를 적용한 유출해석 결과, 두 사상에서 모두 유량이 크게 모의되었다. 이는 HWSD에서는 유역 전체가 양토(수리전도도 0.34cm/h)로 정밀토양도(향석 유역 평균 수리전도도 1.07cm/h)에 비해 약 1/3의 수리전도도 값을 가지고, 정밀토양도를 적용한 경우의 평균 토양심은 70cm이지만 HWSD에서는 37cm로 상대적으로 작기 때문에 토양 침투량은 작아지고, 유출량이 크게 계산되는 것으로 판단된다. HWSD를 이용한 모형 보정에서는 토양 수리전도도와 토양심 매개변수를 중심으로 보정하였으며, 그 결과 관측 유량을 잘 재현할 수 있었다. 위성영상을 이용해서 구축되는 토지피복도와는 달리, 토양정보는 원시 자료가 구축된 지역에 따라서 구축방법, 정확도 등에서 크게 차이가 날 수 있다. 그러므로 글로벌 자료를 이용한 유출해석에서는 토양 자료의 적용 및 이와 관련된 매개변수의 주의가 필요할 것으로 판단된다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.10a
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• pp.647-650
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• 2009

In recent years, an understanding and concern about the Photo Realistic CG increased while the CG industry grew. The overall understanding of a system, an output and algorithm, and etc. are needed in order to implement the Photo Realistic CG. Moreover, for the realistic output on CG, the texture task that it is logical the various environment condition according to the physical environment and time, and etc.s has to show. For carrying out the Photo Realistic CG texture task, the extensity of a texture, the physical properties, a material, and an environment, the various access and the logical analysis are needed. Analyzed data reaches the direct affect to the final product for expressing. The realistic ancient history site, and the cultural inheritance and industrial product will be implemented with the ground of the research of the upper part in the imaginary realistic world.

• Journal of Digital Convergence
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• v.16 no.11
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• pp.477-485
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• 2018

Beyond the mid-2010s, there has been increasing cases of using 'Reminiscence' as a trigger for recalling 'Past' in pre-production process of creative contents. In previous researches on this phenomenon, it has been recognized that retro, recall, compassion, and memory are similar. In order to look closely to grasp the psychological tendency of the contents user in detail, the study about 'Reminiscence' was conducted. The researcher analyzed 'Reminiscence' as a process of restructuration based on the experience and desire of the person individual which were derived from the past and further analyzed it as a lack of desire due to the time can never return. The study hopefully can make a balance against the cutting edge content distribution technology biased production tendency.

• Journal of Korean Society of Rural Planning
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• v.25 no.3
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• pp.19-27
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• 2019

The purpose of this study was to determine whether public services in rural areas performed the functions of public interest value that benefited all residents of rural areas. Therefore, the results were derived through spatial distribution and population characteristics analysis at the level of basic living service facilities. As a result, the status of spatial distribution in the Favorable and Vulnerable areas of rural villages and the status of population distribution in the vulnerable areas was analyzed for retail, child care and medical facilities. In the case of retail facilities, it was found that more than 80.0% of the country's farming villages were distributed in the favorable areas that could be reached within 15 minutes. In the case of child care facilities, 91.5% of the total number of favorable areas could be reached within 15 minutes, and the distribution of child care facilities nationwide was deemed proper. In the case of medical facilities, 90.8% or more villages could be reached within 15 minutes of travel time as a lawmaker, and in the case of hospitals and emergency medical services, 92.7% of hospitals and 68.2% of emergency medical services were analyzed as favorable areas. Through these results, the government intends to establish objective spatial data in rural areas to provide basic information on policy directions and contribute to planning.

• Journal of Cadastre & Land InformatiX
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• v.49 no.1
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• pp.113-121
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• 2019

The fourth industrial revolution technology focused on the fusion of infrastructure and various advanced technologies related city. Therefore, technical cooperation in various fields of research is essential. In order to activating the fourth industrial revolution technologies, it is necessary to research the state of technology in various fields. Consequently, this paper aims to analysis of domestic and foreign research trends on technology to the fourth industrial revolution using SNA and text mining for web site. We collected text, date data of research paper and report in web site for five years, that is, from January 1st in 2014 to December 31st in 2018. Next, we have deduced the major keywords in public data through analyzing the morphemes. Then we have analyzed the core and related keyword lists through an SNA. In Korea, the focus is on R&D and legal/institutional solution in relation to the fourth industrial revolution technology. On the other hand, in the case of foreign, there was focus on practical technologies for urban services in detail aspects.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.23 no.2
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• pp.207-214
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• 2019

The speed of technological development is increasing, and high-performance digital devices are spreading. Wired digital devices such as PCs have been optimized for existing wired environments, but needs are shifting away from the constraints of space and space to smart work that enables efficient work anywhere and anytime. The Smart Work System security design is needed to secure integrity and availability in the face of various security threats including physical threats (lost, stolen, and damaged terminals), technical threats (data theft, DoS: denial of service), and unauthorized access outside the wired environment. In this study, we analyzed smart work network systems, wired / wireless link systems, and digital smart devices. We also studied cyber-attack analysis and cybersecurity design methods for a Smart Work wired system and a future wireless system. This study will be used as basic data for building a secure Smart Work system.

• The Korean Journal of Health Service Management
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• v.13 no.1
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• pp.15-30
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• 2019

Objectives: This study aimed to analyze people's accessibility to medical institutions providing national gastric cancer screening services in Gangwon-do using a geographic information system(GIS). Methods: To assess the spatial accessibility, network analysis was applied. Two types of network analysis-Service area analysis and origin-destination cost matrix(OD-cost matrix)-were applied to create network dataset. Results: The results of the analysis of the service area revealed that it took more than 60 minutes each to reach tertiary hospitals and general hospitals from 74.4% and 9.6% of Gangwon-do areas, respectively. Similarly, it took more than 60 minutes each to reach hospitals and clinics from 4.2% and 3.4% of Gangwon-do areas, respectively. The results of the OD-cost revealed that there were large regional variations in distance and time taken to reach the medical institutions. Conclusions: there were regional variations of spatial accessibility between Si and Gun in Gangwon-do.

• Tunnel and Underground Space
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• v.31 no.1
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• pp.25-40
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• 2021

As the era of Industry 4.0 arrives, the researches using artificial intelligence in the field of rock engineering as well have increased. For a better understanding and availability of AI, this paper analyzed the types of algorithms and how to apply them to the research papers where AI is applied among domestic and international studies related to tunnels, blasting and mines that are major objects in which rock engineering techniques are applied. The analysis results show that the main specific fields in which AI is applied are rock mass classification and prediction of TBM advance rate as well as geological condition ahead of TBM in a tunnel field, prediction of fragmentation and flyrock in a blasting field, and the evaluation of subsidence risk in abandoned mines. Of various AI algorithms, an artificial neural network is overwhelmingly applied among investigated fields. To enhance the credibility and accuracy of a study result, an accurate and thorough understanding on AI algorithms that a researcher wants to use is essential, and it is expected that to solve various problems in the rock engineering fields which have difficulty in approaching or analyzing at present, research ideas using not only machine learning but also deep learning such as CNN or RNN will increase.

• The Journal of Sustainable Design and Educational Environment Research
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• v.19 no.4
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• pp.1-14
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• 2020

This study is to make suggestions on the type and operation of community life SOC projects suitable for the use of idle facilities in elementary and secondary schools. To this end, we analyzed the types and operation of desirable utilization facilities according to regional characteristics through the analysis of cases utilizing Japanese idle classrooms and closed schools. As a result of the study, in areas with excellent accessibility to residents such as old downtowns and towns, libraries, entrepreneurship counseling and exhibition spaces, and lifelong education centers were desirable as part of the residents' convenience facilities. It was found that the facilities that could be used with families, such as an experiential training center, were being utilized.