• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.1
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• pp.243-248
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• 2014

This study was carried out to evaluate the economic value of development of separation and purification techniques of flavonoid in citrus using IRR, NPV. The separation and purification techniques of flavonoid of citrus was developed by national institute of horticultural and herbal science in Korea rural development administration. This technology could be used to improve efficiency and practicality of cultivation of citrus. The research results show that the technological value of separation and purification techniques of flavonoid of citrus was evaluated 3,155(scenario 1)~6,518(scenario 2) million won. IRR was 28.3%~61.2%, which was greater than discount rate(11.9%). NPV is 5,541~18,773 million won. Therefore, the economic validity of development of separation and purification techniques of flavonoid of citrus is identified by the results of technology evaluation.

• Korean journal of communication and information
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• v.35
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• pp.87-113
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• 2006

This study aims to theoretically examine the validity of argument that market-opening will improve the audience welfare of media and cultural contents. To accomplish its purpose, first of all, this study classifies the spectrum of approaches on cultural market-opening in Korea. Then, it examines, by the concept of public goods, whether market-opening can bring on economic gains for audience as consumer. Finally, this study inspects the profit and loss for audience as citizen which will be brought on by market-opening on the grounds of democratic value. As a result of this study, the improvement of economic efficiency and competence, the expansion of consumer‘s choices, the preservation of cultural value that the positive approach on market-opening is promising cannot be justified theoretically and logically. Therefore, at least in theoretically, the conclusion that market-opening cannot improve the audience welfare is deduced. However, the objection of market-opening cannot be related to the distorted protectionism of nation culture. On the contrary, this study suggests the condition of market-opening debate must be a opportunity to reconsider and reform of cultural diversity in Korea.

• Journal of Korea Technology Innovation Society
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• v.16 no.1
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• pp.20-40
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• 2013

A project of developing marine environmental risk assesment and management technology was proposed to improve the level of marine environmental management research. This paper attempts to measure the non-market benefits of the project. To this end, the dichotomous choice contingent valuation method is used. In particular, recently proposed one and one-half bounded model is applied. The model can reduce the potential for response bias comparing to the double bounded model while maintaining much of its efficiency. Moreover, in order to deal with zero WTP observations, a spike model is adjusted for our data. A survey of randomly selected 600 households was implemented and the respondents were asked in person-to-person interviews about how they would be willing to pay for implementing the project. Respondents overall accepted the contingent market and were willing to contribute a significant amount (2,663 won), on average, per household per year. The aggregate value of the project in the nation amounts to approximately 46.3 billion won per year. The figure 2.16 of cost-benefit ratio shows that economic validity of this technical development.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.11
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• pp.6652-6658
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• 2014

This study evaluated the economic value of the development of an environment-friendly controlling method of mushroom using IRR and NPV. The environment-friendly controlling method of mushrooms was developed by the national institute of horticultural and herbal science in Korea rural development administration. This technology can be used to improve the efficiency and practicality of cultivation of mushroom. The research results show that the technological value of the development of an environment-friendly controlling method of mushroom was evaluated at 135.4 billion won (average), 182.6 billion won (maximum), and 88.1 billion won (minimum) based on the discount rate of 7.3%. The IRR was 1,958.5% - 4,054.4%, which was greater than the discount rate (6%~10%). The NPV was evaluated at 134.8 billion won (average), 218.1 billion won (maximum) and 87.5 billion won (minimum) based on the discount rate of 7.3%. Therefore, the economic validity of the development of an environment-friendly controlling method of mushrooms was identified by the results of a technology evaluation.

• Journal of Korea Port Economic Association
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• v.29 no.4
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• pp.201-222
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• 2013

The purpose of the present study is to analyze how and to what degree multinational companies organize and operate their supply chains in accordance with the strategic resource of knowledge in their multinational management, and what kind of influence knowledge oriented global supply chain management has on the management performance of multinational corporations. For this purpose, the current research proposed a measurement model to provide specific shape to the concept of knowledge oriented global supply chain management by adopting the knowledge creation process proposed by Nonaka (1994), and conducted an empirical analysis of what kind of impact the knowledge management system and the knowledge creation process of companies have on the performance of their global supply chain management. The result of the empirical analysis of 113 multinational companies verified the validity and reliability of the measurement model proposed in this study. In addition, the comparative study of the sampled companies by grouping them according to the level of knowledge orientation in global supply chain management indicated that the enterprises that effectively manage the knowledge created within the global supply chain presented overall superiority on the performance of global supply chain management.

• Journal of Korea Port Economic Association
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• v.28 no.4
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• pp.169-191
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• 2012

This study is to investigate the strategy on forming a long term relationship between logistics service provider and demander including maintaining strategy of it. For these purposes, effect on the organization and human factor of Logistics service companies and also, impact on the customer trust and relational commitment against service recovery are analysed. Literature review and empirical study are used to modify research model and to develop questionnaire for logistics service companies. Reliability for measuring procedure yields the same result on repeated trials and validity for identifying the accuracy of the accrual measuring instrument are also used. Suggested hypothesis are verified through multiple regression method and the testing results are shown as follows; First, organization and human factor have a positive effect to the service recovery satisfaction against the service failure of logistics service providing company. Second, the service recovery satisfaction also leads a positive effect on the customer trust and relational commitment.

• Economic and Environmental Geology
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• v.26 no.2
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• pp.207-215
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• 1993

In modem petroleum reservoir engineering, the characterization of reservoir heterogeneities is very important to accurately understand and predict reservoir production performance. Formation evaluation for the description of reservoir is generally conducted by performing the analysis of well logging, core testing, and well testing. However, the measured data points by well logging or core testing are in general very sparse and hence reservoir properties should be interpolated and extrapolated from measured points to uncharacterized areas. In assigning the data for the unknown points, simple averaging technique is not feasible as optimum estimation method since this method does not account the spatial relationship between the data points. The main goal of this work is to develop PC-version of multi-purpose geostatistical model in which several stages are systematically proceeded. In the development of model, the simulator employs a automatic selection of semivariogram function such as exponential or spherical model with the best values of $R^2$. The simulator also implements a special algorithm for the fitting of semivariogram function to experimental sernivariogram. The special algorithm such as trial and error scheme is devised since this method is much more reliable and stable than Gauss-Newton method. The simulator has been tested under stringent conditions and found to be stable. Finally, the validity and the applicability of the developed model have been studied against some existing actual field data.

• Journal of Korea Port Economic Association
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• v.31 no.3
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• pp.75-91
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• 2015

This study aims to assess the competitiveness of 30 logistics centers that operate in the hinterland of the North Container Port at Busan New Port. Thirty-two key factors were selected from previous studies to analyze and improve competitiveness and expand business opportunities in the hinterland. Suggestions from logistics experts were also canvassed. These variables were then put through first- and second-factor analysis to verify validity and measure confidence levels; they were later categorized into five factors and 15 sub-factors impacting on competitiveness. The categorized factors were compared using the analytic hierarchy process (AHP) to assess the importance of each factor and sub-factor in the case of logistics centers in the North Container hinterland of Busan New Port. The findings indicate that factors related to the securing of significant amounts of container cargoes were of greater importance. On the other hand, relatively basic factors proved to be less important in improving the competitiveness of the port hinterland.

• Journal of Korea Port Economic Association
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• v.28 no.1
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• pp.203-227
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• 2012

Based on the review of the existing studies, this study built the conceptual framework describing the structural relationships among port service quality dimensions(port internal service quality, external service quality, interaction quality), customer satisfaction, customer trust and customer loyalty. In specific, switching barrier was included as moderator in customer satisfaction and customer loyalty relationships. The subjects are the customers who use the Busan New Port. A survey using 317 customers was conducted, Confirmatory factor analysis was conducted to test the validity of the measurement model, and AMOS analysis approach was used to gain important insights into how customer retention in the port business can be ensured. Results in this paper indicate that customer trust and satisfaction are identified as antecedents of the port service quality dimensions. Customer satisfaction positively influences trust. Customer trust and satisfaction positively influence loyalty. Switching barrier positively moderates the relationship of customer satisfaction and customer loyalty. Finally, this study suggests that the implications of these findings and offers directions for future research.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.24 no.8
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• pp.133-141
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• 2010

MG(Microgrid) is a small power supply system located on-site that can supply both the electricity and the hot-water simultaneously. Engineering S/W is requested to construct Microgrids economically. We developed Engineering S/W that can combine DERs (Distributed Energy Resources) most economically using the linear programming and estimate of the economic. Developed S/W was programed using GAMS(General Algebraic Modeling System) and it is composed of the optimal DER combination module and forecasting module of renewable energy's output. We embody it based on MS Excel considering the user's convenience and we show its validity through a case study. We think that developed S/W will be very useful for planning MGs and energy supply.