• The Transactions of the Korean Institute of Electrical Engineers A
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• v.53 no.5
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• pp.302-307
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• 2004

As deregulation of power industry is becoming a reality, there has been an intense interest in the strategic bidding for suppliers to maximize their profits. The profit gained by a supplier is related not only to its energy-price bid curve but also to its submitted operational parameters such as generation capacity, etc. So suppliers are willing to use those strategic parameters that can be manipulated by themselves and are effective to their profit. This paper deals with the competition model with compound strategies: generation capacity and bidding curve. The parameter space is modeled by dividing into the two strategies, so the problem is made up of the four types of sub-game in a two player game. This paper analyzes the global Nash Equilibrium (NE) over the whole divisions by computing the sub-game NEs in some divisions and by deriving the best response curves which have discontinuities in other divisions. The global NE is shown to correspond to the Cournot NE where the quantity variable is realized by a constraints of a generation capacity.

• Journal of Digital Contents Society
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• v.19 no.1
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• pp.173-179
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• 2018

With the recent increase in the number of cars and the lack of parking spaces, the number of parking businesses has increased. the parking management has become an essential element in parking business, and the parking management's company becomes an increasingly popular opportunity. However, as competition grows as more and more and companies increase in number, efforts are being made to create new services, gain technological excellence, or reduce costs through current system improvements. In this paper, we developed a parking management system using cloud based LPR(License Plate Recognition) service for effective parking. Structural improvements in the proposed system reduce costs, simplify installation, and respond quickly to failures and updates.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.33 no.2
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• pp.33-38
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• 2010

To survive head-to-head competition, we should keep our labor productivities above those of other nations. However, our labor productivities are low compared to those of the developed countries. It is the well-known fact that we make up for the productivities with long work hours. Entering the line of developed nations safely and enjoying well-being age freely, we need to achieve high labor productivities without sacrificing work hours. What would be a fine solution? Back to the basics! Although it is important to enforce R&D on high-tech products, we should have so-called bluebird philosophy, being faithful to the basics and trying to find solutions at a stone's throw. Basics of basics may be unceasing improvement, establishing reasonable standard times, and maintaining them. To support going back to the basics, this thesis proposes VITAMAX, a motion and time study software. As VITAMAX stands for "Visual Improvement and Time Analysis for Maximizing Profits", it provides a simple and powerful visual tool which is useful for improving manual works and determining standard times. Since VITAMAX is based on the Microsoft Excel and VBA, it is very cost-effective and easy to use. VITAMAX may contribute to the profit increase of manufacturing companies, especially for the small and medium-sized enterprise.

• The Research Journal of the Costume Culture
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• v.20 no.3
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• pp.378-391
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• 2012

Loyalty programs are used by many fashion firms as marketing tools for reducing customer switching and increasing customer loyalty in keen market competition conditions. The purpose of this study is to explore and propose an effective implementation of a loyalty program for a targeted fashion firm's customers by grasping their perceived value of and satisfaction with the loyalty program. Questionnaires were administered to 329 college students in Gwangju. For data analysis, factor analysis, Chronbach's ${\alpha}$, correlation analysis, and a Structural Equation Model using the LISREL 8.30 program were applied. The results were as follows. First, the degree of perceived value of the loyalty program was classified according to cash value, convenience of use, aspirational value, and suitability of use. The aspirational value and cash value significantly affected the students' satisfaction with the loyalty program, but the convenience of use and suitability of use were not significant. Second, higher satisfaction with the loyalty program was related to higher overall customer satisfaction but did not affect customer trust and loyalty. Finally, higher overall satisfaction was related to customer trust but did not affect customer loyalty, and higher trust affected customer loyalty.

• Journal of the military operations research society of Korea
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• v.28 no.1
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• pp.17-28
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• 2002

Recently, To define an enterprise's survival strategy is a difficult task, because the competition of a business is a complexity. The reason is the original research uses a statistical survey method. On a conceptual point of SCM, - as an order of development, physical distribution, logistics management, basic supply chain management and advanced supply chain management etc - a supervisor is magnifying gradually as well as confusing with information and analysis techniques which seems possible. On executing this, however, it has many problems since it is hard and wide; therefore, The Manager don't aware a total executable solution even though the enterprise knows necessity of SCM. On this paper focus on a proposal of alternatives with reasonableness of manufacturing and making a profit of sales department like most of enterprises are willing to overcome such as carelessness and unready strategy of investment additionally, the thesis should effort to find an element through an analysis of cases, a statistical method of effective SCM, and actual survey to propose an alternative; moreover, this paper proved the facts that it could be a guiding company, which has an ability of cooperation with entities through the founding of supply chain. As a conclusion, this essay showed the variation that influences the capacity entities and alternative to define an element which basically influence for a cause and effect.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.599-602
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• 2007

To enhance the competition of National power, the investment of SOC is an essential factor for infrastructure construction. The capital for SOC is so gigantic and the national finance is limited, engagement of various subject is necessary. So, Government is promoting the private sector to invest capital in SOC development. Nevertheless the increasement of SOC investment, various problems were issued in selection & operation of BTL. Therefore, to raise the probability of success for BTL project, escalation, unification and specialization of BTL affairs, BTL selection process were suggested in this study.

• KIEAE Journal
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• v.10 no.1
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• pp.45-55
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• 2010

While Korean construction companies are adapting themselves to rapidly changing business landscape at home and abroad, intensifying competition among competitors in local as well as global market deteriorates the profitability of construction industry, which leads to another problem. In response to such challenges, many construction companies continue to innovate their business portfolio and organization structure, with strong commitment to business process innovation. Furthermore, they need to analyze the productivity of project site management manpower overhauling business processes systematically and develop effective alternative strategies. This research aims to analyze the productivity of project site management manpower. Current operational practices of construction site organizations have been analyzed with focus on large construction companies in Korea and data gathered from project sites have been analyzed from a wide range of perspectives, In so doing, this research is expected to provide basic inputs for any subsequent attempt to estimate proper resource requirement for site management tasks in construction projects and analyze the management productivity of such resources by enabling construction companies to better understand the current operational status of site organization.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.58 no.5
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• pp.898-904
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• 2009

The objective of the present study lies in constructing web-based GIS system providing broad range of information applicable for power/telecommunications distribution facilities through cable. Nowadays, Korea is renowned forits faste sttele communications network across the nation enjoyable for being a test-runbed by worldwide contents providers. It is not too much to say that the trend is caused by the fact that Korea utilizes the cobweb-like power transmission cables applicable for the nationwide telecommunications networking. In particular, the trend has been all the more encouraged by the governmental drive to expedite the telecommunication network by way of the established power transmission facilities deemed as publicutility. Nevertheless, few can deny that the overexcessive competition among telecommunication service providers increasingly gives rise to unauthorized, arbitrary facilitation of distribution devices, which becomes much burden in operating the normal power/telecommunications distribution facilities by a power-generating company. In this regard, the study, to cope with such problems, attempts to develop a web GIS-based information management system compatible with NDIS(New Distribution Information System), a distribution facility management system now under operation by KEPCO, making advantage of GE Energy's SIAS(Smallworld Internet Application) technology. The model provided by this study is expected to get closer into effective operation of distribution facilities along with better sharing of information among conventional telecommunications operators, while getting rid of infringed facilitation cases

• Proceedings of the Korean Institute of Interior Design Conference
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• 2008.05a
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• pp.159-162
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• 2008

The main consumers of wedding market are young people. They prefer differentiated and unique wedding and with the deregulation of using five-star hotels as wedding spaces in 1999, the wedding market has entered into an era of new competition. Under the background like above, this study tries to provide the basis for the effective and systematic interior coordination of wedding spaces. For this study, large banquet halls at 16 five-star hotels in Seoul were selected. Theoretical and field examinations, and interviews were conducted. The elements of wedding space include the architectural elements of floor, walls, and ceiling and lighting, color, fabric, table setting, and flower coordination. This study found that uniformity or repetition is used for the walls while modules are used for the ceiling. Unlike the past, LED is used for lighting to create diverse colors and the range of colors used has been broadened. In addition, fabric, table setting, and flowers are used actively to create overall atmosphere of the space. When these elements are aggregated and analyzed by hotel for interior design style, Hotels H and S have modern style, Hotels L and P have elegant style and Hotel IP have classical style.

• Journal of Electrical Engineering and Technology
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• v.3 no.2
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• pp.199-206
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• 2008

The introduction of competition in electricity markets emphasizes the importance of sufficient transmission capacities to guarantee effective power transactions. Therefore, for the economic and stable electric power system operation, transmission security constrains should be incorporated into the dispatch scheduling problem. With the intent to solve this problem, we decompose a dispatch scheduling problem into a master problem(MP) and several subproblems(SPs) using Benders decomposition. The MP solves a general optimal power flow(OPF) problem while the SPs inspect the feasibility of OPF solution under respective transmission line contingencies. If a dispatch scheduling solution given by the MP violates transmission security constraints, then additional constraints corresponding to the violations are imposed to the MP. Through this iterative process between the MP and SPs, we derive an optimal dispatch schedule incorporating the post-contingency corrective rescheduling. In addition, we consider interruptible loads as active control variables since the interruptible loads can participate as generators in competitive electricity markets. Numerical examples demonstrate the efficiency of the proposed algorithm.