• Korean Management Science Review
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• v.31 no.3
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• pp.113-130
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• 2014

Cooperative coevolutionary algorithm (CCEA) has proven to be a very powerful means of solving optimization problems through problem decomposition. CCEA implies the use of several populations, each population having the aim of finding a partial solution for a component of the considered problem. Populations evolve separately and they interact only when individuals are evaluated. Interactions are made to obtain complete solutions by combining partial solutions, or collaborators, from each of the populations. In this respect, we can think of various interaction modes. The goal of this research is to develop a CCEA for a supply chain network design (SCND) problem and identify which interaction mode gives the best performance for this problem. We present general design principle of CCEA for the SCND problem, which require several co-evolving populations. We classify these populations into two groups and classify the collaborator selection scheme into two types, the random-based one and the best fitness-based one. By combining both two groups of population and two types of collaborator selection schemes, we consider four possible interaction modes. We also consider two modes of updating populations, the sequential mode and the parallel mode. Therefore, by combining both four possible interaction modes and two modes of updating populations, we investigate seven possible solution algorithms. Experiments for each of these solution algorithms are conducted on a few test problems. The results show that the mode of the best fitness-based collaborator applied to both groups of populations combined with the sequential update mode outperforms the other modes for all the test problems.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.32 no.2
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• pp.120-131
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• 2009

Most world-leading companies are aware that Environment and Health and Safety Issues are critical to the product quality and sustainable growth of their company. Environment-friendly efforts are seen in almost all aspects of business operations in an advanced nation. The Extended Producer Responsibility(EPR) and EU Directive on Waste Electric and Electronic Equipment(WEEE) attempt to tackle the growing quantity of WEEE by making producers responsible for the costs of the collection and recycling of their products at the End-of-Life(EOL). To implement the RFID-based integration system for EOL household electric appliances, such as washing machines and refrigerators, we analyzed the process of collecting, recovering, and recycling the EOL products returned from the distribution points. Furthermore, we proposed a soon-to-be process using the RFID-based integration system in the metropolitan recycling center(MRC). This soon-to-be process model is composed of RFID tags, readers, ALEs, applications and several devices. Through the introduction of the RFID-based integration system, we are expecting to see increasing traceability and real-time management for EOL products from customers, and also improvements in valuable reusable materials(VRM) produced from recycling processes.

• Spatial Information Research
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• v.6 no.2
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• pp.183-199
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• 1998

The motivation of this paper comes from a recognition that GIS educators in the private and public sectors are faced with both an opportunity and a dilemma. As the GIS vendors move to open systems which can be integrated with many traditional operations, the use of spatial data and analysis will become widespread throughout business, government and education. Hence the need for standardization in GIS fields is expanding rapidly. Especially non-standardized terminology of GIS prevents GIS-users from communicating among the GIS application fields. This paper will assist this shifting foundation by providing terminology control procedures for ISO/TC2ll family of standards and KS(Korea Standards) information terminology and make recommendations for the improvement and harmonization of terminology.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.44 no.7 s.361
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• pp.70-80
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• 2007

For supporting various mobile networks, this paper proposes a framework of distributed connection admission control, named SmartCAC. Especially, intelligent CAC operations are adopted in terms of interoperation between mobile nodes and mobile networks. This scheme does not need to correct information between networks. Basically vertical handover call can use guard channel that was reserved for handoff, because SmartCAC addresses the identification between vertical handover call and new call, delay and reliability as requirement of QoS for efficient connection control. The scheme also uses mobile terminal speed for network filtering. Especially an extended protocol is proposed to give different network states information to mobile nodes because there have been no ways for mobile nodes to compare the states of different networks. Sophisticated simulation study is performed in order to evaluate SmartCAC in terms of signaling cost. As a result, signaling cost of ours is up to 96% better than that of the existing scheme.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.43 no.3
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• pp.29-40
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• 2020

Korean firms have been vigorously searching and exploring overseas market opportunities through export and overseas investment. As of end of 2019, there were more than 80,000 Korean overseas subsidiaries all over the world. With Korean overseas direct investment increasing recently, it became one of the important issues for overseas investors to be successful in the global market. There are a lot of studies on factors influencing the performance of overseas subsidiaries such as 'firm' and 'country' factors. This study empirically examines subsidiary performance determinants with 'industry architectures' by using a sample of 292 overseas Korean firm subsidiaries. Industry architectures are the stable but evolving sets of rules and roles through which labor is divided within a sector. This article considers how industry architectures shape success in international expansion. Industry architectures differ between countries, are not necessarily technologically determined, shape firms' capabilities and their competitive environment, and constitute a distinct level of analysis. We extract antecedents of related theory and empirically test its impact with a survey of Korean firms expanding in emerging economies. We would say this is the first study which tries to focus on industry architectures with the performance of Korean overseas subsidiaries. We find that separability and similarity of industry architectures across countries and localization of subsidiaries are robust and important predictors of success in international expansion. Our results suggest that industry architectures should be added to firm and country as an intermediate level of analysis that helps explain success in international expansion. While we established a pattern, much more remains to be done. We focus on the success of foreign operations, but we do not consider the broader benefits of going abroad, such as the learning or network effects that accrue at the level of the entire firm. The next obvious question is whether the results would differ in the developed market context. These we leave for future research to consider.

• Journal of the Korean Society of Safety
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• v.27 no.3
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• pp.49-56
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• 2012

The purpose of this paper is to present a model for operating an emergency power system(EPS) that can secure a sufficient power supply used in case of a fire by analyzing the status of power supplies for emergency and firefighting operations. Investigations on the one of the causes of the operational failure of firefighting systems show evidence of EPS. Generally, when power to a building is interrupted, EPS supplies the emergency load(excepted firefighting load) first. When a power outage and a fire occur simultaneously, the EPS must be able to supply both the emergency load and the firefighting load, especially the firefighting load to the end. However, in order to save construction costs, emergency power generators in apartment, commercial, and business buildings can satisfy only one of the required loads. In cases like this, when a power outage and a fire occur simultaneously, there is a danger of firefighting equipment not operating due to insufficient power supply from the emergency generator. Therefore, an EPS must have a reserved firefighting power that can supply both the firefighting and the emergency load. Such EPS, when faced with a danger of an overload, will shut down the supply to all or part of the emergency load, thus securing a continuous power supply to the firefighting equipment. The generator power system with reserved firefighting power (RFP) will also have an indicator to show that the selective control is being used. General power generation systems for emergency load and firefighting load were found to have a demand factor of 50-60% with a lump. However, when installing an EPS, the builders must choose the higher demand factor suggested according to the official approval demand factor of the building.

• Journal of the Korea Society of Computer and Information
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• v.17 no.6
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• pp.191-199
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• 2012

By the way, in light of the knowledge, even public institutions are paying much attention to the management of IT assets for achieving organizational goals. Recently, some public institutions adopt balanced scorecard for enhancing efficiency in operations and management of total administrations. To be interested, some key performance indicators(KPI) of the balanced scorecard reflect the three aspects of IT assets and their possible outcomes. The main focus of this study is to investigate whether there is positive effects of IT asset management through balanced scorecard at public institutions. Specifically, we selected and classified KPIs into different categories depending on three aspects of IT assets, internal process change, and organizational outcomes. To address relationships of KPIs among the categories, we specified each category and developed as a variable respectively. A middle-sized city provided us with 138 KPIs for the development of scales.

• Journal of Arbitration Studies
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• v.25 no.4
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• pp.51-75
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• 2015

Administrative ADR to solve new problems has the characteristics of a new project, hence ADR is established and operated with a lack of human and material resources in the process of introducing administrative ADR. Therefore, it is preferred to resolve conflicts by less costly counseling and mutual agreement before mediation. When we try to settle the disputes through administrative ADR at the stage before mediation, it causes problems for the neutrality and impartiality of the dispute settlement procedures. In this case administrative ADR systems should introduce devices that ensure the impartiality of the process. In some issues becoming social problems, relevant administrative agencies are inclined to establish ADR systems. If ADR systems become available, a person who may use ADR services may have some trouble grasping ADR institutions because he/she can hardly distinguish their business affairs. By subdividing administrative affairs, when the disputes have the issues that touch on various fields of the affairs, parties in the disputes have to take ADR procedures one by one in all ADR-related institutions. This may lead to too heavy a burden on the disputing parties, furthermore forcing them to give up the remedies of their rights. For more efficient ADR operations, it is necessary that the institutions which set up and operate ADR systems should actively exchange and cooperate with one another. They need to forge and strengthen the solidarity between administrations and courts. The administrative agencies which run ADR themselves have to build up the devices for preparing human resources and material facilities for administrative ADR.

• Journal of Fisheries and Marine Sciences Education
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• v.18 no.3
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• pp.244-260
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• 2006

The main objective of this study aims at analyzing the national roles of fisheries in the global economy from the constitutional view point. Globalization provides general firms and businessmen with great opportunities that allow them to be able to plan and operate their business strategies beyond the national boundaries. WTO and FTA negotiations must be important facilitators of such globalization. However, Korean primary industries like fisheries under comparative disadvantage have a high probability that there may have to be the trade-offs between the primary and the industrial sector to maximize national benefits in the process of bilateral and/or multilateral international trade deals. Since, moreover, fishermen face strong binding constraints under which they hardly carry out fishing operations standing aloof from national boarders, they have to manage fishing businesses within their own national territory, to maintain and develop fisheries culture, and to explore their own destiny for themselves. Because of such reasons, the constitution imposes upon the State the duty to support and develop fisheries and fishing villages. Considering its article and spirit associated with fisheries(i.e. article 123), it seems unnecessary at this point in time that Korean society makes debates over national consensus for supporting fisheries. The reason is because the explicit provisions of the constitution do not allow their arbitrary interpretation depending upon interests or policy situations. However, where national support to the particular sector could not meet the expected social value system, there would be a great deal of chance to invite serious societal debates over such national commitment to the fisheries. Therefore, whether using it efficiently and realizing the socially expected policy goals must be a responsibility of both fisheries administration and fishing industries.

• Journal of Korea Society of Industrial Information Systems
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• v.9 no.1
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• pp.69-76
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• 2004

Recently, smart cards with multi-applications loaded are becoming popular owing to many advantages. As many casual users would like to reduce the number of plastic cards, and card issuers want to upgrade the existing applications or add the new applications, and developers wish to reduce the development turn-around time, multi-applications smart cards are becoming important. In addition, many advantages exist between the business partners as smart card applications can share critical information. New operating systems such as JavaCard and MULTOS are suggested for the multi-applications smart card service recently. In this paper, after we review the principles of operations of smart card, we propose the various security mechanisms for the multi-application JavaCard service environment, which is becoming de facto standard in the industry.