• 지질공학
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• 제23권3호
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• pp.257-269
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• 2013

산사태나 비탈면 재해를 예방하기 위해서는 적절한 계획을 수립하여야 하며, 국가의 한정된 예산을 고려했을 때 체계적인 투자 계획이 마련되어야 한다. 국도 도로비탈면의 체계적인 관리와 합리적 투자 계획 수립을 위하여 위험도와 예상피해도를 고려하여 투자우선순위를 산출하였다. 투자우선순위에서 위험도 결정의 주요인자는 경사, 토질, RMR, 안정석해석, 불연속면 종류, 붕괴이력이며, 피해도는 교통량과 차선수, 평균차량위험도를 고려하여 결정하였다. 강원도 영서지방 392개소 비탈면에 대한 투자우선순위 산출 및 회귀분석 결과, 붕괴가 발생된 비탈면의 투자우선순위가 높은 것으로 확인되며, 위험구간비가 높은 비탈면, 계곡부가 존재하는 비탈면이 높은 투자우선순위를 차지하는 것으로 확인된다.

• 전기학회논문지
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• 제57권9호
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• pp.1531-1535
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• 2008

In the past vertically integrated power system, the power utility forecasted power demand and invested new power plants to keep a system adequacy. However, in the competitive electricity markets, a principle part of the capacity investment is market participants who decided the investment to maximize their profit. Especially, one of the main factors in their long-term decision making is the retrieval of fixed costs (construction costs). This paper presents the capacity payment in electricity power markets. The capacity payment (CP) in Cost Based Pool (CBP) is needed to recover fixed costs. However, CP in CBP was applied not only recovering fixed costs but also ensuring supply reliability. In order to operate harmonious power markets, pool needs reasonable CP mechanism. This paper analysis CP using capacity proportion and Reliability Pricing Model (RPM).

• KDI Journal of Economic Policy
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• 제40권2호
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• pp.23-52
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• 2018

Given the limited availability of data in South Korea, this study proposes a method by which to estimate regional capital stock by modifying the benchmark year method (BYM) and applies it to estimate regional net capital stock by sector in transport infrastructure. First, it estimates time-varying sectoral depreciation rates using the sectoral net capital stock and the investment amount for each period. Second, it estimates the net capital stock of each period using the net capital stock in the base year and the investment in each period. Third, in order to ensure that the sum of net capital stocks by region is equal to the nationwide estimate, the national estimates are allocated to each region according to the proportion of the values derived from the previous stage. The proposed method can alleviate well-known problems associated with conventional BYMs, specifically the upward bias and arbitrary choice of the depreciation rate.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2004년도 학술.기술논문발표회
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• pp.71-74
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• 2004

Recently, with the wide shortage of natural sand resources, it has been increasingly used the crushed sand. rushed sand is made by the process of crushing the rocks artificially, which has different particle properties compared with that of natural sand. Because such different panicle properties of crushed sand results in an undesirable effects of concrete. improvement technology for crushed sand particle properties like grain shape and fine particle needed during the manufacturing process. In this paper, improvement technology of grain shape and fine particle is reported. According to test results, adequate investment for manufacturing facilities like impact crusher and abrasion test machine is required to meet the advanced grain shape and grading of crushed sand. Based on the investigation of test result, mixing of natural land and crushed sand with given proportion can achieve the improvement of grain shape. For improving excessive fine panicle contents. current manufacturing system also can enhance the existing technology for fine particle without additional investment. It can be concluded that adequate investment and research can improve the quality of crushed sand.

• The Journal of Asian Finance, Economics and Business
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• 제7권3호
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• pp.289-294
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• 2020

The study of environmental pollution plays an important role in controlling emissions in the production activities of FDI enterprises as well as export goods. Vietnam is a country with a large proportion of FDI contribution and high export value. Therefore, there should be studies to assess the actual effects of FDI and the openness of the economy (trade) on the environment. Therefore, the authors conduct research on the role of FDI and trade on environmental quality in Vietnam. With data collected from 1990 to 2018 (from the period of Vietnam's economy opening up) through the ARDL (Autoregressive Distributed Lag) model, the results show that FDI has a positive impact on CO2 emissions in the short term but has no impact on the long-term (In this study, CO2 is considered to represent environmental quality). The trade has a positive impact on CO2 emissions in both the short term and long term. The results of the study show the actual shortcomings of FDI as well as production activities in the export enterprises in Vietnam. From the results of this research, the author also provides the causes and remedies to control of CO2 emissions from two activities of foreign direct investment and trade.

• KEPCO Journal on Electric Power and Energy
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• 제8권2호
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• pp.79-86
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• 2022

Recently, the amount of maintenance is increasing due to the aging of power facilities, but the budget is constrained. Therefore, the importance of asset management that selects replacement priorities based on the failure probability and enhances investment effects is increasing. Because the number of distribution transformers is very large, the proportion of investment cost is very high. Therefore, it is important to select the investment priority by evaluating the reliable remaining life based on the failure probability. This paper evaluates the statistical expected life using the failure data of distribution transformers for the last 11 years and the current operation data. The hazard rate of distribution transformer and MV cable was compared with each other and the adequacy of early failure removal was reviewed and the statistical expected life corresponding to the cumulative failure probability B3% was calculated.

• 디지털융복합연구
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• 제12권4호
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• pp.115-131
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• 2014

본 연구는 벤처캐피탈 투자가 중소벤처기업의 기술적 성과(특허)에 미치는 영향을 분석하였으며 분석결과는 다음과 같다. 벤처캐피탈 투자지분율이 높을수록, R&D집약도가 높을수록 기술적 성과에 정(+)의 영향을 미치는 것으로 나타났다. 또한 벤처캐피탈이 공동투자한 기업 또는 투자지분율이 월등하게 높은 리딩(leading) 투자자가 있는 투자기업의 경우에도 기술적 성과가 정(+)의 결과를 보이고 있다. 그러나 기업규모가 클수록, 기술인력이 많을수록 기술적 성과가 정(+)의 결과를 보이고 있으나 유의하지 않았다. 이는 벤처캐피탈의 투자기업에 대한 모니터링과 통제 그리고 경영 또는 기술적 지원이 효과를 발휘하고 있거나 다른 투자자들의 검증을 받은 기업 또는 비교적 안정적인 기업에 투자가 집중된 결과로 해석할 수 있다.

• 정보보호학회논문지
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• 제24권6호
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• pp.1271-1284
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• 2014

본 논문에서는 정보보호 관리체계를 구축하고 운영하고 있는 기업에서 외부감사(ISO27001)와 내부감사(보안전담조직에 의한)에 대한 결함 및 권고사항을 기술적 영역, 관리적 영역, 물리적 영역으로 분류하고 예산과 투자에 대한 상관관계를 확인하여 어떠한 영향이 있는지 분석하였다. 분석 결과는 시간의 흐름에 따라 관리적 보안영역과 기술적 보안영역에서 일관성 있는 연관관계를 확인하였으며 특히 미집행 예산(예산액-집행액) 규모와 감사 결함 및 권고사항의 수가 정(+)의 관계에 있음을 확인할 수 있었다. 이를 통해 상관분석 결과에 따른 유사도를 통계 분석하여 정보보호 투자의 효과성을 검증할 수 있는 모델을 제시한다. 그리하여 기업의 정보보호 투자에 대한 체계적인 방법론 접근과 정보보호 정책 수립 시 정확한 의사결정 방향에 도움이 되고자 한다.

• Asian Journal of Business Environment
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• 제2권1호
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• pp.19-23
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• 2012

The economic exchanges have become increasingly frequent between China and Korea and the average annual growth rate of the total trade volume has increased by 30% since the establishment of diplomatic relations between the two countries. With the rapid economic growth and industrial upgrading of China, there are changes in the investment of Korea in China and domestic demand of China, and the trade structure of Sino- Korea has changed a lot in recent years. The changes have mainly manifested in the following aspects, including the increased proportion of high-tech products, raw materials and the intra-industry trade, the decreased proportion of consumer goods, the inter-industry trade and the trade deficit of China. With the development of the situation of international economy, the scale of Korea and China trade will continue to expand and the structure of Korea and China trade will also keep on changing in the long run.

• 산업경영시스템학회지
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• 제38권3호
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• pp.95-99
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• 2015

The IRR(internal rate of return) is often used by investors for the evaluation of engineering projects. Unfortunately, it has serial flaws: (1) multiple real-valued IRRs may arise; (2) complex-valued IRRs may arise; (3) the IRR is, in special cases, incompatible with the net present value (NPV) in accept/reject decisions. The efforts of management scientists and economists in providing a reliable project rate of return have generated over the decades an immense amount of contributions aiming to solve these shortcomings. Especially, multiple internal rate of returns (IRRs) have a fatal flaw when we decide to accep it or not. To solve it, some researchers came up with external rate of returns (ERRs) such as ARR (Average Rate of Return) or MIRR (MIRR, Modified Internal Rate of Return). ARR or MIRR. will also always yield the same decision for a engineering project consistent with the NPV criterion. The ERRs are to modify the procedure for computing the rate of return by making explicit and consistent assumptions about the interest rate at which intermediate receipts from projects may be invested. This reinvestment could be either in other projects or in the outside market. However, when we use traditional ERRs, a volume of capital investment is still unclear. Alternatively, the productive rate of return (PRR) can settle these problems. Generally, a rate of return is a profit on an investment over a period of time, expressed as a proportion of the original investment. The time period is typically the life of a project. The PRR is based on the full life of the engineering project. but has been annualised to project one year. And the PRR uses the effective investment instead of the original investment. This method requires that the cash flow of an engineering project must be separated into 'investment' and 'loss' to calculate the PRR value. In this paper, we proposed a tabulated form for easy calculation of the PRR by modifing the profit and loss statement, and the cash flow statement.