• Proceedings of the KIEE Conference
• /
• 대한전기학회 2008년도 제39회 하계학술대회
• /
• pp.562-563
• /
• 2008

경쟁적 전력시장에서는 이익주체의 다양화로 송전망확장은 개별 시장참여자의 경제적 편익에 큰 영향을 미칠 수 있다. 송전설비 투자계획은 미래 전력 시장 및 계통의 예측을 바탕으로 하기 때문에 예측의 불확실성에서 발생하는 설비투자의 과잉.과소투자의 최소화 방안이 필요하다. 따라서 본 논문은 송전망확장사업의 경제적 가치를 평가하는 방법에 대해 연구였고 미래 시장 및 계통의 불확실성을 반영하기 위해 전력수요와 연료가격의 과거 예측오차의 표준편차를 이용한 예측값의 확률밀도함수의 모델링 방법을 이용한 송전망확장의 경제성 평가 방법을 제시한다. Monte Carlo Sampling을 이용, 송전망확장으로 인한 시장참여자의 경제적 편익 변화의 기대값과 편익 변화의 범위를 산출함으로써 설비투자의 리스크와 잠재효과에 대해 분석한다.

• Journal of the Korean Association of Geographic Information Studies
• /
• 제14권1호
• /
• pp.94-106
• /
• 2011

The muddy water occurrence possibility of reservoir were analyzed by considering GIS based soil erosion model, sediment delivery ratio and effective reservoir capacity. For the purpose, the weakness factors for the establishment of countermeasures of basin were analyzed by evaluating input factors of RUSLE model based on spatial data such as DEM, soil map, landcover map and so on. The potential of soil erosion was estimated considering highland upland. The sediment yields of Chungju-Dam and Soyanggang-Dam showed the highest result in sediment yield using sediment delivery ratio with considering basin area. The sediment concentration of Imha-Dam and Chungju-Dam showed the highest value as 0.791 $kg/m^3/yr$ and 0.526 $kg/m^3/yr$ respectively in sediment concentration with considering effective reservoir capacity. Especially, sediment yield of Imha-Dam was about 2.36 times lower than Soyanggang-Dam, but the sediment concentration was 1.90 times higher preferably, because the effective reservoir capacity of Imha-Dam was about 4.48 times lower. This study calculated sediment concentration using the 10 years mean rainfall event and could consider the aspects of soil, terrain, landcover, cultivation condition and effective reservoir capacity of each basin effectively through the results. Therefore, these quantitative sediment concentration data could be used to estimate the potential of high density turbid water for reservoir and applied with effective tools for the management of reservoir.

• Journal of Korean Tunnelling and Underground Space Association
• /
• 제11권2호
• /
• pp.141-150
• /
• 2009

When constructing a subsea tunnel in discontinuous rock mass, fluid flow in joints has a great influence on the behavior of the tunnel so that hydro-mechanical coupled analysis should be performed for the stability estimation. In practice, relaxed rock load is generally used for the design of tunnel concrete lining. In a continuum analysis, a method based on the distribution of local safety factor around a tunnel was proposed for the estimation of a potential relaxed zone. However, in the case of discontinuous rock mass in which joints are developed, the whole stability of tunnels depends on the behavior of the joints. In this study, therefore, a method is proposed for the estimation of a potential relaxed zone occurred by the excavation of a tunnel in discontinuous rock mass. The suggested method is validated by sensitivity analysis and the comparison with the results of continuum analysis.

• Analytical Science and Technology
• /
• 제35권3호
• /
• pp.93-115
• /
• 2022

Potential impurities in pharmaceuticals could be produced during manufacture, distribution, and storage and affect quality and safety of pharmaceuticals. In particular, highly reactive impurities could result in carcinogenic (mutagenic) effects on human body. International Conference on Harmonisation (ICH) has provided M7(R1) guideline for "Assessment and Control of DNA Reactive (Mutagenic) Impurities in Pharmaceuticals to Limit Potential Carcinogenic Risk" and recommended an adoption of this guideline to the authorities. ICH M7(R1) guideline provides classification, accepted intakes, and controls of potential impurities in pharmaceuticals. However, since appropriate and unified analytical methods for impurities in pharmaceuticals have not been provided in this guideline, most potential impurities in pharmaceuticals are still difficult to manage and supervise by pharmaceutical companies and regulatory authorities, respectively. In this review, we briefly described definition of unintended mutagenic impurities, basic information in ICH M7(R1) guideline, and analytical methods to determine potential impurities. This review would be helpful to manage and supervise potential impurities in pharmaceuticals by pharmaceutical companies and regulatory authorities.

• Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
• /
• 제8권4호
• /
• pp.339-346
• /
• 2010

Recently, there have been grave concerns that the anticipated increase in the use of nuclear energy worldwide could result in dissemination of sensitive nuclear technologies. To meet the increase in nuclear energy demand and strengthen the non-proliferation regime simultaneously, the various proposals for 'multilateralization of nuclear fuel cycle' have been widely suggested. Those proposals are expected to have serious impacts on our country, if they has come true. In this paper, therefore, the 12 existing proposals were reviewed and assessed for their potential impacts on our country, in order to help prepare the appropriate measures responding to the international attempt of 'multilateralization of nuclear fuel cycle'.

• The Korean Journal of Financial Management
• /
• 제11권1호
• /
• pp.123-155
• /
• 1994

자본시장개방(資本市場開放)의 장기계획(長期計劃) 아래 추진된 증권시장의 개방은 국내경제를 한단계 높은 수준의 개방경제(開放經濟) 체제(體制)로 전환시키는 계기를 제공하는 혜택(惠澤)이 있는 반면에, 개방으로 유입되는 해외투자자금이 주식시장은 물론 거시경제지표(巨視經濟指標)에 부정적 영향을 미치는 경우를 배제할 수 없다. 부정적 현상으로 단기투기성(短期投機性) 자금에 의한 주가의 단기급등(短期急騰)이나 거품현상, 실물경제의 기반없는 해외부문통화(海外部門通貨) 증발(蒸發)에 따른 물가와 금리불안(金利不安), 그리고 원화의 수요증가(需要增加)로 인한 평가절상(評價切上) 압력으로 국제수지의 악화 등이다. 증시개방 이후 유입된 해외주식투자(海外株式投資) 자본(資本)이 거시경제 변수인 통화(通貨), 환율(換率), 그리고 주식시장(株式市場)에 미친 영향을 일반회귀분석, ARCH, VAR등의 모형을 통하여 연동적(連動的)인 유기관계(有機關係)를 실증적으로 분석한다. 분석 결과 통화량(通貨量)과 환율(換率)이 해외유입 자본으로 인하여 예상했던 부정적 효과를 나타냈다는 것을 입증(立證)할 근거(根據)는 찾을 수 없었다. 주가와 거래량은 해외주식 투자자금이 유인된 후 약 2주이내에 상승하였지만, 해외주식 투자자금의 유입원인(流入原因)은 주가(株價)와 거래량(去來量)의 상승세(上昇勢)로 인한 것이 아니라 주식시장의 위험도(危險度)와 잠재성(潛在性)에 비하여 주가(株價)가 저평가되어 향후 고수익율이 보장된다는 기대가 주요한 요인이라고 결론내릴 수 있다.

• Korean Journal of Culture and Social Issue
• /
• 제10권2호
• /
• pp.39-77
• /
• 2004

This literature review introduced the concept of psychopathy which has never been defined academically in Korea. Also it is reviewed how this concept could be applied as latent factor of criminal behavior in the forensic settings. For this purpose, first of all, the periodical change of psychopathy definition was explored. Then it was investigated which determinants might develop psychopathy and what would be the behavioral characteristics of psychopaths. Finally, risk assessment tools measuring psychopathy were introduced and their predictive efficacy and applicability in Korean criminal justice system was discussed.

• Journal of Korean Society of Forest Science
• /
• 제97권3호
• /
• pp.255-265
• /
• 2008

This study is aiming at providing the useful information for successful implementation of the forest resource promotion policy through analyzing the impacting factors and their relationships on policy accomplishment and policy effectiveness in executing the forest resource promotion policy. Interview survey was conducted on the stake-holders such as government officers and civilians who have direct or indirect influences on the establishment and execution of the forest resource promotion policy. The forest resource promotion policy was heuristically analyzed by using the LISREL (Linear Structural RELations) Model. The policy accomplishments of forest resource promotion significantly showed the positive relations with the suitability of problem recognition, the suitability of policy decision-making and rationality of policy execution, while the degree of policy support and the policy accomplishments were having significant impacts upon the policy effectiveness. Since the path coefficients between the latent variables and observed variables and among the latent variables mostly showed the positive relations significantly, the forest resource promotion policy was evaluated very successful in terms of policy accomplishments and policy effectiveness.

• The Journal of the Korea Contents Association
• /
• 제15권2호
• /
• pp.408-418
• /
• 2015

The purpose of this study is to evaluate the official medical tourism websites in several countries. We compared the websites of three countries using the 4 criteria(e.g.,contents, convenience, design, interactivity). The evaluation of accessibility and subjective perception were conducted by websites users. Total 77 cases were used for the analysis. For the statistical analysis of data, MANOVA was used. According to the MANOVA analysis, The Malaysia website received the highest mark in accessibility and subjective perception. Each of the evaluations showed a significant difference among countries.

• Journal of the Korea Institute of Information Security & Cryptology
• /
• 제23권5호
• /
• pp.873-883
• /
• 2013

Security vulnerability quantification is the method that identify potential vulnerabilities by scoring vulnerabilities themselves and their countermeasures. However, due to the structural feature of smart grid system, it is difficult to apply existing security threat evaluation schemes. In this paper, we propose a network model to evaluate smartgrid security threat for AMI and derive attack scenarios. Additionally, we show that the result of security threat evaluation for proposed network model and attack scenario by applying MTTC scheme.