• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.800-807
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• 2009

The limited public funds available for infrastructure projects have led governments to consider private entities' participation in long-term contracts for finance, construction, and operation of these projects to share risks and rewards between the public and the private. Because these projects have complicated risk evolutions, diverse contractual forms for each project member to hedge risks involved in a project are necessary. In light of this, Build-Operate-Transfer(BOT) model is considered as effective to accomplish Public Private Partnerships(PPPs) with a characteristic of an ownership-reversion. In BOT projects, the government has used such an incentive system as minimum revenue guarantee(MRG) agreement to attract the private's participation. Although this agreement turns out critical in success of BOT project, there still exist problematic issues in a financial feasibility analysis since the traditional capital budgeting theory, Net Present Value(NPV) analysis, has failed to evaluate the contingent characteristic of MRG agreement. The purpose of this research is to develop real option model based on option pricing theory so as to provide a theoretical framework in valuing MRG agreement in BOT projects. To understand the applicability of the model, the model is applied to the example of the BOT toll road project and the results are compared with that by NPV analysis. Finally, we found that the impact of the MRG agreement is significant on the project value. Hence, the real option model can help the government establish better BOT policies and the developer make appropriate bidding strategies.

• 국제학술발표논문집
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• The 1th International Conference on Construction Engineering and Project Management
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• pp.437-446
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• 2005

Recently as people's values are changing from development phase into running stage after quality of life, so that the needs of environmentally friendly construction are gradually increasing. Also populace discontent about the pollution during construction process such as the noise and vibration caused by construction machinery is increasing. Even though it is impossible to eliminate the construction pollution fully, it is necessary to make efforts to reduce construction pollution to a minimum. In terms of construction site operating, the first possible step for solving these matters directly is that the necessary sum of expenses must be secured as the environmental management costs in the conceptual phase. However, in fact, the environmental management costs have not been secured in the budget. Generally it is the major reason not arising proper activities to prevent the pollution in the construction site. The purpose of this research is to suggest the efficient budgeting method regarding Environmental management costs to ensure the necessary sum of environmental management expenses. To provide an efficient budgeting method, interviews with the person in charge of environment management was conducted. 78 construction sites was surveyed and environmental management costs were analyzed through their historical data from the survey. According to the results of analysis, the ratio of environmental management costs is revealed 0.45% of construction cost as average comparing 0.2% of legal limit. And usually the environmental management cost was appropriated into the safety management budget. So it is needed to isolate environmental management budget securely and modify the ratio of Environmental conservation Costs in Construction Technology Management Act.

• 천문학회보
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• 제46권2호
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• pp.78.1-78.1
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• 2021

A Lunar observatory not only provides ideas and experiences for space settlements from the Moon to Mars, but also puts the telescope in an optimal position to compete with space telescopes. Earth observation on the Moon's surface has the advantage of no atmospheric scattering or light pollution and is a stable fuel-free observation platform, allowing all longitude and latitude of the Earth to be observed for a month. Observing the entire globe with a single observation instrument, which has never been attempted before, and calculating the global albedo will significantly help predict the weather and climate change. Spectropolarimetric observations can reveal the physical and chemical properties of the Earth's atmosphere, track the global distribution and migration path of aerosols and air pollutants, and can also help detect very small space debris of which the risk has increased recently. In addition, the zodiacal light, which is difficult to observe from Earth, is very easy to observe from the lunar observatory, so it will be an opportunity to reveal the origin of the solar system and take a step closer to understanding the exoplanet system. In conclusion, building and developing a lunar observatory will be a groundbreaking study to become the world's leader that we have never tried before as a first step in expanding human experience and intelligence.

• 한국습지학회지
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• 제25권4호
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• pp.366-378
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• 2023

본 연구는 자연 친화적 공공공간의 확보가 아동의 건강한 성장에 미치는 영향을 분석하고 독일의 사례를 고찰하여 한국에의 시사점을 도출하고자 하였다. 자연은 아동의 놀이와 신체활동을 증가시켜 인지능력과 행복도를 향상하는데 도움이 된다. 전반적으로 학업 스트레스 지수가 높고 행복도가 낮은 국내 아동을 위하여 반드시 제공해야 할 공간으로 판단된다. 그러나 독일의 '자연체험공간 사업' 사례가 보여주듯 아동을 위한 자연 친화 공간을 조성하기 위해서는 국가적 차원의 법적 지원이 필요하다. 또한 해당 사업이 주요 국가정책과 연계되어야 한다. 더 나아가 학제간 협업뿐 아니라 보호자가 자연환경에 대하여 긍정적으로 인식할 필요가 있다.

• Structural Monitoring and Maintenance
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• 제10권3호
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• pp.243-260
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• 2023

Indonesia has had seismic codes for earthquake-resistant structures designs since 1970 and has been updated five times to the latest in 2019. In updating the Indonesian seismic codes, seismic hazard maps for design also update, and there are changes to the Peak Ground Acceleration (PGA). Indonesian seismic design uses the concept of building performance levels consisting of Immediate occupancy (IO), Life Safety (LS), and Collapse Prevention (CP). Related to this performance level, cases still found that buildings were damaged more than their performance targets after the earthquake. Based on the above issues, this study aims to analyze the performance of base isolation design on existing target buildings and analyze the seismic fragility for a case study in Indonesia. The target building is a prototype design 8-story medium-rise residential building using the reinforced concrete moment frame structure. Seismic fragility analysis uses Incremental Dynamic Analysis (IDA) with Nonlinear Time History Analysis (NLTHA) and eleven selected ground motions based on soil classification, magnitude, fault distance, and earthquake source mechanism. The comparison result of IDA shows a trend of significant performance improvement, with the same performance level target and risk category, the base isolation structure can be used at 1.46-3.20 times higher PGA than the fixed base structure. Then the fragility analysis results show that the fixed base structure has a safety margin of 30% and a base isolation structure of 62.5% from the PGA design. This result is useful for assessing existing buildings or considering a new building's performance.

• Spatial Information Research
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• 제19권4호
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• pp.1-10
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• 2011

이 연구는 홍수, 허리케인, 위험물질 누출에 대한 과학적으로 측정된 환경위험지수와 가계의 특성간의 상관관계를 조사하였다. 이 연구는 인구적 특성(연령, 가족 수, 결혼 상태, 거주 기간)과 두 가지 자연재해(홍수와 허리케인)의 위험지수 사이에는 통계적으로 유의미한 관계가 없음을 보여주었다. 이 결과는 Drabek의 연구 결과를 지지하는 바, 사람들은 그들의 나이, 성별, 가족수, 결혼 상태, 거주기간과 관련 없이 그들의 주거를 선택하는데 자연재해의 가능성을 과소평가하거나 무시하는 경향이 있음을 보여주고 있다. 대조적으로, 위험물질 누출에 대한 환경위험지수는 위에 열거한 인구적 특성과 통계적으로 유의미한 상관관계를 보여주었다. 이는 가난하고 학력 수준이 낮은 사람들이 인적 재난에 더 노출된 지역사회에 사는 경향이 있음을 보여주고 있다.

• 한국지리정보학회지
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• 제5권4호
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• pp.35-44
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• 2002

GIS 기술은 하루가 다르게 발전하고 있는데 비해서 GIS 기술과 활용방법을 배울 수 있는 교육환경은 매우 열악하다. 이에 따라 공공부문에서는 GIS 응용시스템의 경제적 이용가치가 낮고 산업체에서는 GIS 전문인력을 구하는데 애를 먹고 있는 실정이다. 또한 GIS 분석기술이 다양한 분야로 보편화되면서 GIS에 대한 개념과 기술을 배우려는 교육수요가 급격하게 늘어나고 있다. 이러한 배경 하에서 본 연구는 우리나라 공공과 민간 그리고 대학에서 실시되고 있는 GIS 교육의 실태를 설문조사를 통하여 분석하였다. 그리고 조사결과를 바탕으로 GIS 전문인력 양성을 위한 교육환경 개선방안을 모색하였다. 공공과 민간 대학의 열악한 교육환경을 개선하기 위해서는 무엇보다는 국가차원의 계획적 투자가 필요한 시점이다.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2011년도 학술발표회
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• pp.21-21
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• 2011

Many Asian countries are suffered from various problems on water, which include the need for increased access to improves water supplies and sanitation through investments in infrastructure and capacity building, the balances water management system between development and ecosystem, and the need to reduce the human populations'vulnerability to water-related disasters, in particular, from climate variability and evolution. Decison makers are the most influential people in policy making and solving global water problems is central issue in eradicating poverty and achieving sustainable development (MDG). They across the world form an integral part of the architecture of national or regional governance. Their role covers a range of decision-making processes including passing legislation, scrutinizing government policy, and representing citizen through the election. We must ensure that these quiet but important issues get the political space, financial priority and public attention they deserve. Regional bodies such as the EU have also enacted legislation which introduces rules on water quality and other enforceable mattera across state boundaries. With this growing body of laws and policies on water issues, the role of decision makers is growing. Recognizing this role, decison makers' platform is essential to provide an opportunity to discuss crucial water issues in each country or region and for the purpose "2010 Parliaments for Water in Asia" has planned and organized to investigate our common issues and goals. During the meeting, we have an opportunity to observe water policy of Bangladesh, Bhutan, China, Mongolia, New Zealand and the Philippines and share the views on what needs to be done to move forward by decision makers for the future of water. In conclusion, the process of developing the decision makers' platform in each region would be ultimately essential point to increase the awareness of the developed and developing countries' roles, knowledge to clarify roles and responsibilities of each stake holders and finally be a major actor for resolving not only water challenges also issues of human settlements.

• 대한지리학회지
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• 제47권6호
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• pp.884-898
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• 2012

지명에는 해당 지역과 그 지역주민들의 삶에 관한 정보들이 녹아 있다. 특히, 오래전부터 이어져 온 고지명은 더 많은 공간적 속성들을 포함한다. 본 연구에서는 전통 지명의 하나인 고지명 '두모'를 연구대상으로 하여 그 분포와 특성을 고찰하였다. '두모'는 Nam(1996)에 의해 연구되기 시작한 지명군으로, 어원적 의미를 살펴본 결과 지명 자체에 산이나 물과 연관된 지형적 입지 조건의 의미를 내포하고 있었다. 그리고 전국에 걸쳐 비교적 균등하게 분포하는 가운데, 85%가 인문지명으로 사용되고 있었고 그중에 73%는 취락명이나 행정구역명 등 취락지명이 차지하고 있었다. 본 연구에서는 두모계 지명의 마을 220개만을 가지고 두모계 취락의 입지와 지명의 확산을 심층 분석하였다. 그 결과, 두모계 취락이 주로 남 동향을 취하고 배산임수의 지형적 조건을 갖추고 있었으며, 마을의 확장에 따라 두모계 지명이 분화되면서 여러 개의 두모계 지명이 함께 분포하고 있음을 확인하였다.

• 한국환경복원기술학회지
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• 제24권2호
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• pp.85-102
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• 2021

Phytosociological characteristics on Quercus acutissima forests distribution in Daechong-dam basin survey has been carried out using Z.-M. School's methodology and numerical-classification analyses. A total of 43 phytosociological relevés were sampled. Syntaxa were described as Oplismenus undulatifolius-Quercus acutissima community(typicum subcommunity, Phryma leptostachya var. asiatica subcommunity, Ulmus davidiana var. japonica subcommunity), Quercus acutissima community and Quercus variabilis-Quercus acutissima community (typicum subcommunity, Castanea crenata subcommunity). The above three plant communities were classified with species composition reflecting local environmental characteristics of mountain topographies, inclination degrees, and rock exposure rates. Conclusively, those communities were recognized as secondary vegetation affected by high intensity and frequency of human impacts as they inhabited in southward hill lands and low lying grounds in mountains adjacent to human settlements and arable lands. Quercus acutissima community was classified as rural type syntax based on their inlandward distribution and species composition differences from urban forests. Afforest process and natural succession were discussed in relation with habitat environmental elements of Quercus acutissima forest in the survey area.