• Journal of the Korean Operations Research and Management Science Society
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• v.31 no.1
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• pp.91-103
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• 2006

Given a bill of materials (BOM) tree T labeled by the breadth first search (BFS) order from node 0 to node n and a general network ${\Im}=(V,A)$, where V={1,2,...,m} is the set of production facilities and A is the set of arcs representing transportation links between any of two facilities, we assume that each node of T stands for not only a component. but also a production stage which is a possible stocking point and operates under a periodic review base-stock policy, We also assume that the random demand which can be achieved by a suitable service level only occurs at the root node 0 of T and has a normal distribution $N({\mu},{\sigma}^2)$. Then our integrated model of facility location problems and safety stock optimization problem (FLP&SSOP) is to identify both the facility locations at which partitioned subtrees of T are produced and the optimal assignment of safety stocks so that the sum of production cost, inventory holding cost, and transportation cost is minimized while meeting the pre-specified service level for the final product. In this paper, we first formulate (FLP&SSOP) as a nonlinear integer programming model and show that it can be reformulated as a 0-1 linear integer programming model with an exponential number of decision variables. We then show that the linear programming relaxation of the reformulated model has an integrality property which guarantees that it can be optimally solved by a column generation method.

• Journal of Korean Physical Therapy Science
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• v.24 no.1
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• pp.59-68
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• 2017

Purpose : The aims of this study was to conduct a systematic literature review with meta-analysis to investigate the effect of virtual reality based rehabilitation program on balance of patient with stroke in Korean studies. Method : The studies for analysis were searched in electronic databases(Research Information Sharing Service; RISS, Korean Studies Information Service; KISS, DBpia, e-articles, National Assembly Library). The key words for search were 'virtual reality', 'stroke', and 'balance' and only randomized controlled trials and clinical controlled trials were included. Of 40 studies identified in the search, 20 studies met the criteria of this study and included in this meta-analysis. Result : The results were as follows: 1) The overall effect size of virtual reality based rehabilitation program was 0.557(95% critical interval; 0.340~0.774). 2) In the analysis of sub-categorical variables, effect size was as follows; the commercial game type(0.621) > virtual environment type(0.335); the dynamic balance measurement(0.750) > static balance measurement(0.226); randomized controlled trial(0.653) > clinical controlled trial(0.275); and thesis type(0.706) > article of journal type(0.339). 3) In the analysis of sub-continuous variables, as time of program(per session) increased, the balance increased(p<0.05). Conclusion : The results of this study showed that virtual reality based rehabilitation program moderately improves the balance of stroke patient. Further studies are recommended to investigate the effect of sub-variables related to virtual reality programs on motor functions of patient with stroke.

• Journal of Korean Society of Archives and Records Management
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• v.16 no.3
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• pp.235-256
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• 2016

This study suggested a digital curation framework for supporting the digital policy of institutes that collect memory. As such, it conducted a literature review and an analysis of digital curation models, as well as a focus-group interview of historians and graduate students majoring in historical studies. In this study, digital curation framework refers to an abstract model for supporting policy development and the planning for a high-level view of the archival information service. This implications of this framework are as follows: (1) to emphasize the data life cycle and connection between stages and actions; (2) to make an infra-schema for understanding institutes that create, arrange, or store specific data as the same history contents have to be provided by different institutes and as there are differences in the data's value; (3) to check the present conditions of information services and their systems; (4) to consider the practical applications of contents that have been collected and stored; and (5) to converge all data in one system through the framework and activate diverse works in the context of the framework.

• International Commerce and Information Review
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• v.6 no.2
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• pp.43-62
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• 2004

The present study reviewed the meanings of mediation and the roles of mediators, and examined the necessities of online mediation system, prerequisites for the settlement of the system, foreign cases of promoting online mediation and the current state of online mediation in Korea. It also identified problems in the mediation system in Korea and, based on the analysis of problems, discussed directions for the development of Korean mediation system in broad perspective. Directions for the development of Korean online mediation system suggested in this study can be summarized as follows. Firstly, the government must make an unsparing investment in order to activate online mediation system in Korea. Secondly, from the aspect of online mediation procedure, it is necessary to introduce online mediation system in combination with online seal system or certification marks. Thirdly, the judicial circle must take an amicable attitude toward ADR system and, furthermore, it is necessary for the court to be active in introducing various ADR systems. Fourthly, it is necessary to establish an integrated mediation system for the efficiency of mediation and cost saving. Fifthly, mediators must be provided with systematic and exhaustive periodical retraining programs. Lastly, it is necessary to help people to recognize that mediation system is a better service than other forms of dispute resolution procedure and particularly to enhance users' confidence in online mediation through advertising its advantages and safety. Moreover, in order to make e-commerce-related online dispute resolution available to everybody, it is necessary to overcome language barriers by establishing perfect service systems including automatic translation system in the governmental dimension.

• International Commerce and Information Review
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• v.13 no.1
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• pp.77-96
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• 2011

Recently e-marketplace, one of the e-business models, has gotten the spotlight so many companies have invested in the E-marketplace work or considered doing business in such a fashion. According to these conditions, Internet business chances are expanded and strategic activities are increased in ocean or harbor fields, as well. In addition, these days, port-related-ideas have changed just increasing the carloadings, expanding the harbor facilities so called quantity growth into creating the high valued-added business, namely quality growth. The Shipping Instrument supply business is one of the important high valued-added businesses of the harbor-related field. However, because the Shipping Instrument supply business at Gwangyang Port is very poor and operated on a small scale, the harbor service business has not been activated. Thus this study demonstrates that the e-Marketplace is forming a way to expand the Shipping Instrument supply business in order to develop the harbor service business at Gwangyang Port.

• Korean Business Review
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• v.18 no.1
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• pp.1-17
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• 2005

This study attempts to investigate the IT utilization and e-business level of the small and medium companies in order to facilitate their e-commerce efforts. Results show that they have basic IT infrastructures such as internet and PC, but they use their IT resources mainly for office automations. Major problems with such low level of IT utilization are in their lack of manpower, skill, and fund. Considering above issues, web hosting service is believed as a good measure to alleviate their problems. Hence, this paper suggests that utilization of the web-based ASP can be a viable solution for the currently revealed issues. Also, development of creative IT application(business) cases and their advertizement can lead small and medium finns to more productive IT investments, which requires more diverse IT performance measurements such as BSC(balanced scorecard), other than traditional ROI.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.43 no.3
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• pp.101-111
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• 2020

Companies struggle to make their best products with high quality and service at a competitive price in global markets. However, customer needs and requirements keep changing with a variety of situations. Companies that face the changes can not stay the same and make an effort to adapt themselves to new circumstances. They would probably review the overall management system that is currently implementing to improve management efficiency. Among other things, quality might be considered to be a crucial element if they are manufacturing industries to be sustained in global markets. KSA (Korean Standards Association) is a government-affiliated organization under the Ministry of Trade, Infrastructure, and Energy. It is a Korean standards provider for quality and service industry. KSA confers national commendations for organizations, quality circles, artisans, QCEC (Quality Competitive Excellent Company), and the most honorable KNQA (Korean National Quality Award) every year. KSA established KNQA on the basis of Malcom Baldrige National Quality Award, Deming Prize, and European Quality Award. Research on quality awards shows that there are many similarities in the framework. Although KSA summarizes two factors for 13 evaluation indicators in the quality competitive excellent model of QCEC, the categorization is ambiguous to explain them according to earlier studies. We performed a deep analysis of foreign quality awards and background for KNQA and QCEC. We conducted a content analysis of KNQA and QCEC and matched evaluation items that were closely related. We proposed a quality competitiveness model with three factors, Technology, System, and Tools, summarizing 13 evaluation indicators in QCEC. Based on audit data for six years from 2012 to 2017 we carried out a confirmatory factor analysis for the proposed model by examining the model validity and fitness.

• Journal of Korean Academy of Nursing Administration
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• v.18 no.1
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• pp.106-117
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• 2012

Purpose: This study was designed to develop quality outcome indicators for nursing homes and community-based home care that would contribute to an appropriate evaluation and improvement of quality of long term care in Korea. Methods: The preliminary quality indicators of long term care were developed from a literature review and clinical expert panel. A content validity testing was done using a panel of experts who were selected from academic and clinical field of long-term care. The final quality indicators were confirmed after application in four nursing homes and four home care agencies to test clinical validity. Results: The preliminary quality indicators consisted of 3 domains and 19 indicators. The final quality indicators were composed of 4 domains and 17 indicators. Conclusion: This study demonstrated the feasibility of outcome quality indicators in long term care. These quality indicators can be effectively used to evaluate the quality of nursing home and home care and to improve the quality of care in the Korean long-term care system.

• Journal of Korean Medicine Rehabilitation
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• v.30 no.4
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• pp.55-64
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• 2020

Objectives This study aimed to analyze the trends of Korean traditional medicine treatment for idiopathic scoliosis. Methods We searched clinical studies used Korean traditional medicine for idiopathic scoliosis in 4 Korean online databases 'Koreanstudies Information Service System', 'Earticle', 'Oriental Medicine Advanced Searching Integrated System', 'Research Information Sharing Service'. We selected 18 studies and analyzed their characteristics according to author, publication year, number/sex/age of patient, treatment period, intervention, outcome measure and result. Results Eighteen case report studies were selected by criteria and randomized controlled trials were not found. The most frequently used therapy was Chuna therapy. Cobb's angle was most commonly used outcome measure. Conclusions In this study, we reviewed studies used Korean traditional medicine treatments for idiopathic scoliosis. However, evidence is limited because all selected studies were case reports. This study suggests that further clinical studies are needed to provide higher evidence about Korean traditional medicine treatment for idiopathic scoliosis.

• Culinary science and hospitality research
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• v.21 no.4
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• pp.175-191
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• 2015

The purpose of this study is to investigate the relationships among personality, LMX(leader-member exchange), and innovative behavior of the employees engaged in the foodservice business. In order to achieve the purpose of this study, a literature review was first carried out concerning personality, LMX, and innovative behavior of employees. The questionnaire survey was conducted on foodservice employees working at a hotel buffet restaurant and an independent buffet restaurant in the Busan area. The survey period was from Oct. 1, 2014 to Oct. 15, 2014, and 236 cases were used for analysis. The results are as follows. Foodservice employees who are agreeable and extroverted are likely to develop innovative ideas in the course of their job duties. In addition, foodservice employees who are agreeable, extroverted and conscientious are likely to practice innovative ideas. LMX, especially the contributable relationship between leader and employee, has a positive effect on the development of innovative ideas, and the contributable, respectable, and loyal relationship between leader and employee has a positive effect on the practice of innovative ideas in the foodservice industry.