• 한국컴퓨터정보학회논문지
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• 제20권12호
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• pp.175-180
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• 2015

It is important to maintain information system (IS) following the business and institutional change. Even if successfully developed information systems, we cannot gain the benefit from the systems without the proactive maintenance activities. However, the importance of IS maintenance has not been considered as much as the system development, and we don't have any specific performance management structure. The objective of this study is to identify the relationship between IS maintenance activities and utilization. For empirical test of the hypothesis model, the sample data is collected from public information system sites. Results from multiple regression analysis reveal that proactive maintenance activities including IS maintenance cost increase, improving functionality, and enhancing ease of use have a causal effect on the IS utilization.

• 한국건축시공학회지
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• 제2권4호
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• pp.123-129
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• 2002

This research is aiming to specify the requirement of the investment such as initial cost, running cost earning rate to make effective investment considering the purpose of remodeling and economical value of store building enough to meet the initial purpose of remodeling. The review of earning rate for economical evaluation was performed by the on-site auditing on the structure and function of the building and applying the assessment simulation program, which is to find the possible business model to identify the requirement of building owner through case study. After the research, the following results are obtained. First, it is important that many aspects should be carefully analysis and the best method should be selected as characteristics of remodeling can tie defer each other in their implementations. Second, though the remodeling of exist buildings to promote the functions has been applied. no suitable assessment tool has bee developed for deriding the level of remodeling in the view of economical efficiency so far. Third, the economical benefit was evaluated by analysing annual earning rate which is applied by investment items and recovery period for the investment. More specific data base should be established to apply the suggested economic accession in business enough to forecast the future circumstances. More researches should be promoted on this area continuously as well as the integrated economic evaluation of remodeling on existing building.

• 한국산학기술학회논문지
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• 제16권9호
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• pp.5829-5835
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• 2015

본 연구는 독특한 기업 지배구조 형태가 대리인비용을 완화시켜 차입비용을 감소시킬 수 있는지에 대해 실증 분석하였다. 지배대주주가 존재하는 가족기업은 그렇지 않은 기업에 비해 위험회피 경영과 기업의 성과와 명성 중시 및 기업의 장기 존속 등의 면에서 채권자들과 이해가 일치되어 부채의 대리인비용이 완화될 수 있다고 주장되었다. 본 연구에서 지배 대주주 지분율 및 외국인투자자 지분율 등 기업 지배구조와 차입비용 사이의 관계에 대한 실증 분석결과, 지배대주주 지분율과 외국인투자자 지분율은 차입비용에 대해 2008년 금융위기 이전에는 계수추정치가 유의적이지 못하였으나 2008년 금융위기 이후에는 계수추정치가 유의적으로 나타났다. 2008년 금융위기가 극복된 이후에, 지배대주주 지분율은 차입비용과 음의 유의적인 계수추정치를 보여 기업 지배구조에서 가족 지배대주주의 존재는 차입비용을 감소시키는데 크게 긍정적인 영향을 미치는 것으로 나타났다. 반면, 외국인투자자 지분율은 차입비용과 양의 유의적인 계수추정치를 보여, 오히려 차입비용을 증가시키고 있는 것으로 나타났다. 본 연구를 통해, 지배대주주 지분율이나 외국인투자자 지분율 같은 기업의 지배구조 형태가 기업의 차입비용과 신용위험에 미치는 영향은 체계적이며 계량적으로 유의적으로 나타나고 있으며, 취약한 지배구조는 주주들에게 부정적인 영향을 미칠 뿐만 아니라, 기업의 경제적 가치를 하락시켜 채권자들에게도 불리한 영향을 줄 수 있다는 것이 확인된 것이다.

• Earthquakes and Structures
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• 제22권6호
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• pp.561-570
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• 2022

It is of great importance to be able to evaluate different structural systems not only based on their seismic performance but also considering their lifetime service costs. Many structural systems exist that can meet the engineering requirements for different performance levels; therefore, these systems shall be selected based on their economic costs over time. In this paper, two structural systems, including special steel moment-resisting and the ordinary concentric braced frames, are considered, which are designed to meet the three performance levels: Immediate Occupancy (IO), Life Safety (LS), Collapse Prevention (CP). The seismic behavior of these two systems is studied under three strong ground motions (i.e., Tabas, Bam, Kajour earthquake records) using the Perform3D package, and the incurred damages to the studied systems are examined at two hazard levels. Economic analyses were performed to determine the most economical structural system to meet the specified performance level requirements, considering the initial cost and costs associated with damages of an earthquake that occurred during their lifetime. In essence, the economic lifetime study results show that the special moment-resisting frames at IO and LS performance levels are at least 20% more economical than braced frames. The result of the study for these building systems with different heights designed for different performance levels also shows it is more economical from the perspective of long-term ownership of the property to design for higher performance levels even though the initial construction cost is higher.

• Fisheries and Aquatic Sciences
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• 제25권9호
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• pp.473-488
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• 2022

To have a better understanding of the impact of the PETRONAS oil and gas platform on commercial fisheries activities, Universiti Malaysia Terengganu (UMT) examined two approaches which are data collection from satellite and data collection from fishermen and anglers. By profiling the anglers who utilize reefed oil and gas structures for fishing, it can determine if the design and location of the reef platforms will benefit or negatively impacts those anglers and fisherman. Furthermore, this assessment will be contributing to the knowledge regarding the value of offshore oil and gas platforms as fisheries resources. Collectively, the apparent fishing activity data included, combined with the findings in the reefing viability index will help to inform PETRONAS's future decommissioning decisions and may help determine if the design and proposed locations for future rigs-to-reefs candidates would benefit commercial fishing groups, further qualifying them as appropriate artificial reef candidates. The method applied in this study is approaching by using a data satellite known as Google's Global Fishing Watch technology, which is one of the applications to measure commercial fishing efforts around the globe. The apparent commercial fishing effort around the selected twelve PETRONAS platforms was analyzed from January 2012 to December 2018. Using the data collection from fishermen which is the total estimation of commercial fish value cost (in Malaysia ringgit, MYR [RM]) in Peninsular Malaysia Asset, Sabah Asset, and Sarawak Operation region. The data were extracted every month from 2016 to 2018 from the National Oceanic and Atmospheric Administration database. Most of the selected platforms that show a high frequency of vessels around the year are platform KP-A, platform BG-A and platform PL-B. The estimated values of commercial fishes varied between platforms, with ranged from RM 10,209.92 to RM 89,023.78. Thus, platforms with high commercial fish value are selected for reefing in-situ and will serve multi-purposes and benefit the locals as well as the country. The current study has successfully assessed the potential reefing area of the Malaysian offshore environment with greater representativeness and this paper focused on its potential as a new fishing ground.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2006년도 정기학술발표대회 논문집
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• pp.384-389
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• 2006

최근 경량전철 건설사업에 대한 수요가 증가하고 있으며, 경량전철 건설 사업은 주로 민자사업의 형태로 추진되고 있다. 따라서 사업에 투자할 비용을 계약기간 동안 해당 시설물 운영을 통해 수익창출을 해야 하는 민간건설업체 입장에서는 생애주기측면에서 보다 정확한 비용의 산정이 요구되고 있다. 특히, 경량전철 건설사업에 있어서 비용측면에서 많은 부분을 차지하고 있는 교량은 기존의 생애주기비용 산출방식보다 정밀한 비용 산출이 필요하였다. 이에 본 연구에서는 문헌고찰을 통해 LCC 분석 모델을 개발하고, 비용분류체계를 제시하였다. 제시된 비용분류체계를 바탕으로 경량전철 교량 상부구조 형식별 공사비와 보수 ${\cdot}$ 보강 ${\cdot}$ 교체 이력자료를 바탕으로 비용발생주기 및 비용단가 등을 수집 ${\cdot}$ 분석하였다. 또한, LCC분석을 위한 기본적인 가정사항을 설정한 후, 각 항목별 실적자료 정보를 활용하여 LCC 측면에서의 경제성 평가를 실시하였다. 그간 경량전철을 비롯한 철도교량에 대한 LCC분석연구가 많이 이루어지고 있지 않은 상황임을 감안할 때, 본 연구를 통해 제시된 비용분류체계와 유지관리 관련 데이터는 철도교량의 체계적인 유지관리 활동에 대한 기반이 될 것으로 기대된다.

• 항공우주정책ㆍ법학회지
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• 제5권
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• pp.303-320
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• 1993

The construction of New Seoul International Airport is under way despite much controversy. Among much discussed, but not well-formulated controversy is the possibility of the airport as a hub in the North Asia Region. This paper specifies the factors which render it possible for an airport to be a regional hub. Then each factor is applied to the new airport to see whether it can function as a hub airport. Also examined is the qualitative cost and benefit calculation related to the hub function. The usual discussion has missed one big point of cost side of hub function in the belief that the hub only produces benefits to the national economy where the airline and airport industry belong; earlier-than-expected congestion and the necessity to expand the airport sufficiently enough to accommodate the increasing air demand. An airport as a hub is determined by several factors; geographical location ; economic status of the country where the airport belongs ; bilateral air service agreements according to which the airlines can exercise the route rights; the airport charges which directly influence the cost structure of the carriers ; international aviation and airport related policies of each country in the region ; airport capacity etc. The tentative implications of this paper are the followings; first, the new airport is able to function as a regional hub in the transpacific routes which connect Asian countries and North America. That is, directional hubbing by the airlines is implicated; second, the main benefits may be accrued to american airlines exercising all the route rights in the Asian region; third, the governmental effort to make the new airport a regional hub must take caution in optimizing the hubbing level (% of transitting passengers and freight) between the benefits and the costs. Further Studies may include optimal level of hubbing for the new airport and, quantification of the impact of the new airport on the national economy depending on the degree of hubbing.

• 한국항해학회지
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• 제19권1호
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• pp.49-69
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• 1995

What is the national competitive power\ulcorner What are the determinants of national competitive advantage\ulcorner In order to find these problems, this study was initiated theoretically through the international trade theory and international managerial strategic theory. The flow of studies, in connection with these competitive advantage, come into industries competitive advantage from national competitive advantage. It is understood that the flow of studies is based on the change of paradigm about the international industry environment. Today, the international industry environment has been changed into vigorous situation with the new trade system such as globalization, UR negotiation, WTO system instead of GATT. Among these environments, all enterprises in any industries should try to enhance their benefit, income profits and develop their management strategy, because it is essential for them to keep and make a profit in order to be competitive against all other rivaling enterprises. According to researchers and the ages of history, the concept and determinants of competitive advantage have been dissimiliar as followings. 1) Theory of absolute advantage : Absolute Product Cost. 2) Theory of comparative advantage : Comparative Product Cost. 3) Theory of reciprocal demand : the Reciprocal Demand Structure. 4) Theory of Hechsher-Ohlin : Factor Endowment. 5) Paradox of Leontief : the Quality of Factor Endowment. 6) Theory of technological gap : R & D. 7) Technological gap model : The Technological Gap. 8) Theory of the product life cycle : Product Life Cycle. 9) Christensen's study : Firm's character & manager's character. 10) Monopolistic Advantage Theories : Monopolistic Advantage 11) Electic theory : Ownership, location and internalization specific advantages. 12) Theory of value chain : Cost advantage, Differentiation, Focus. However all these theories have the limit of illustration regarding today's competitive situation, the Porter's theory shows well the determinants of competitive advantage with competitive strategy. Therefore, the analysis of the competitive advantage for maritime industry should be studied by the determinants of competitive advantage of nations

• 대한교통학회지
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• 제26권6호
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• pp.113-122
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• 2008

본 연구에서는 위계구조 대중교통 노선망의 효율성을 이론적으로 해석한 박준식 외(2007c)의 연구를 연장하여 실제 자료를 적용한 결과를 도출하고 이의 실제 적용성을 검토하였다. 가상의 운영비용계수를 추정하는 모형을 구축하여 운영비용 계수를 추정하였으며, 이를 활용하여 도시철도 도입을 위해 요구되는 최소 통행수요를 도출하였다. 본 연구에서 산출한 최소 통행수요는 하나의 계산 예에 불과하며 모형 내/외부의 여러 가지 요소에 따라 가변적이다. 모형 내부의 경우 운영비용 계수와 도시철도의 통행속도가 주요 변화요소인데, 운영비용계수가 작고 통행속도가 빠른 경량전철의 경우 도시철도의 도입 가능성이 보다 높은 것으로 검토되었다. 모형 외부의 경우 노선망의 구조와 수요분포, 대중교통의 수단분담율에 대해서 검토한 바, 본 연구에서 산출한 최소 통행수요 값이 이들 변화요소들에 따른 예상치들 중 최대값이 될 것으로 판단된다. 투자평가의 경우 본 연구의 모형에서보다 편익을 과다추정하고 비용을 과소추정하는 것으로 검토되었는데, 본 연구의 결과값이 현실적인 변화요소들에 따른 기대치들 중 최대값임을 감안하면 투자평가는 결국 현실적인 수준에서 적정하게 평가하고 있는 것으로 볼 수 있다. 본 연구는 해석적인 접근을 통해 도시철도 도입의 효율성을 분석하였기 때문에 많은 단점과 한계를 갖고 있다. 또한 투자평가와 같은 실용적인 분석에 있어서도 나름대로의 한계를 갖는 것을 확인하였다. 이론적인 해석과 실용적인 방법론을 비교 검토하여 보다 정확하고 합리적인 분석 틀을 마련하는데 본 연구가 바탕이 될 수 있을 것이다.

• 대한건축학회논문집:구조계
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• 제36권4호
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• pp.153-161
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• 2020

This study investigates the recycling potential of demolition waste (DW) according to building structure, while considering economic aspects. For that, this study surveyed 1,034 residential buildings to collect reliable information on demolition waste generation rates (DWGRs). This study suggested a method for operational cost calculation for each stage and carried out an inventory analysis. The economic value of recycled DW materials was also calculated. And then, the recycling potential(RP) was calculated by building structures and waste types. RP by building structure was low (27-40%), and RP was found in the order of masonry-block, wooden, RC and concrete-brick. By type of DWs, the RP of aggregates was considerably lower than 7%, and DWs such as wood, plastics, and metals showed more than 100% RP. Considering the results of this study, In order to improve the RP of buildings and DWs, the diversification of products that recycled waste like aggregates (i.e., mortar, concrete, bricks, blocks, tiles) and the development of high value-added products are considered to be the most urgent problems. Based on the above RP results, this study proposed a more advanced method for life cycle assessment of buildings and demolition waste.