• KSII Transactions on Internet and Information Systems (TIIS)
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• v.10 no.8
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• pp.3701-3727
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• 2016

Recently Service Function Chaining (SFC) is promising to innovate the network service mode in modern networks. However, a feasible implementation of SFC is still difficult due to the need to achieve functional equivalence with traditional modes without sacrificing performance or increasing network complexity. In this paper, we present a configurable network service chaining (CNSC) mechanism to provide services for network traffics in a flexible and optimal way. Firstly, we formulate the problem of network service chaining and design an effective service chain construction framework based on integrating software-defined networking (SDN) with network functions virtualization (NFV). Then, we model the service path computation problem as an integer liner optimization problem and propose an algorithm named SPCM to cooperatively combine service function instances with a network utility maximum policy. In the procedure of SPCM, we achieve the service node mapping by defining a service capacity matrix for substrate nodes, and work out the optimal link mapping policies with segment routing. Finally, the simulation results indicate that the average request acceptance ratio and resources utilization ratio can reach above 85% and 75% by our SPCM algorithm, respectively. Upon the prototype system, it is demonstrated that CNSC outperforms other approaches and can provide flexible and scalable network services.

• International Commerce and Information Review
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• v.12 no.1
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• pp.403-428
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• 2010

This research is about global investment for managing the important position, what Korea is doing in World's main market. Considering there are some differences between developed countries' model and developing countries' model in doing direct overseas investment, they target to get political agreement and develop the new invest plan and strategy by understanding changes of Korean manufacturing companies in direct overseas investment between 2001 and 2008 and analyzing the change of yearly investment motivation. The result from this result let us know that company should develop their own idea for their competitive advantage by doing direct overseas investment. And, the overseas investment, which was already done in other countries, 1. Review its realities and tendency in terms of investing countries, industries, and its scale and then Set up an actual model, based on strategic combination of investing location select and determination of Korean manufacturing companies. 2. Analyze how the situational factors have influenced and what factors would be considered for direct overseas investment. From the analyzing result, even though it is fairly true that raising wage and getting resources, and developing alternating industries for export had influenced at the beginning, overseas investing companies' policy will be influenced by the results from studying marketing-pursuit type, local producing and manufacturing by using low-wage people for local sale, and situation for changing investing tendency as service industry.

• The Korean Journal of Rehabilitation Nursing
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• v.12 no.2
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• pp.92-101
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• 2009

Purpose: This study was conducted to explore the functional status and long-term care services for the community-dwelling low-income elderly. Method: A descriptive research design was used in this study. The functional status of the participants was obtained using Minimum Data Set-Home Care Version 2.0 and the long-term care services were identified via Michigan's choice. Total of 154 persons aged 65 years or older completed Korean Minimum Data Set-Home Care Version 2.0 on the community dwelling low-income elderly. Results: The average of Activities of Daily Living was 4.19, and the range was 0-55, while the average of Instrument of Activities of Daily Living was 4.85 and the range was 0-56. Among the subjects, 46.1% belonged to the Information and Referral group and 1.3% to the Nursing Home group. Severe daily pain was reported by 14.9%, and 76.6% of the participants had impaired vision. The Activities of Daily Living was difference according to living with, education, vision, and depression. The long-term care services differed according to gender, pain, vision, hearing, and depression. Conclusion: The support policy for the elderly needed to focus on impaired visual and depression to enhance the activities of daily living. Moreover, there is a need for the Information and Referral group to arrange and develop nursing intervention resources.

• Journal of Information Processing Systems
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• v.2 no.2
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• pp.107-113
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• 2006

It is essential to guarantee a handoff dropping probability below a predetermined threshold for wireless mobile networks. Previous studies have proposed admission control policies for integrated voice/data traffic in wireless mobile networks. However, since QoS has been considered only in terms of CDP (Call Dropping Probability), the result has been a serious CBP (Call Blocking Probability) unfairness problem between voice and data traffic. In this paper, we suggest a new admission control policy that treats integrated voice and data traffic fairly while maintaining the CDP constraint. For underprivileged data traffic, which requires more bandwidth units than voice traffic, the packet is placed in a queue when there are no available resources in the base station, instead of being immediately rejected. Furthermore, we have adapted the biased coin method concept to adjust unfairness in terms of CBP. We analyzed the system model of a cell using both a two-dimensional continuous-time Markov chain and the Gauss-Seidel method. Numerical results demonstrate that our CAC (Call Admission Control) scheme successfully achieves CBP fairness for voice and data traffic.

• Journal of Korean Library and Information Science Society
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• v.25
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• pp.405-439
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• 1996

During his reign, Kwang-Hae-Kun has done various works to promote literature and book acquisition. Among those works is the establishment of a special office called 'Tok Seo Dang' as he was enthroned in 1608, though it was demolished in 1622. And 'Seo Chuk Kyo In To Kam' was built to recover the scattered and lost books. He encouraged the people to collect and publish books by rewarding those who were engaged in a sort of library works. Their primary responsibility was to collect rare and essential resources, seek the material even in China and publish them using metal printing type. They even sought the diaries and newsletters which the individuals kept at their house. The collected materials were first copied and then kept in 'Shilok' shrine. Among the imported books are Dae Myung Hoi Chon, Chon Choo Sa Chon, Tong Kam Chan Yo, Du Si Tong Chon, Ok Hae, Mun Seon, Hak Hae, Lim Geo Man Rok and some were without titles. Majority of the compiled materials were medical books and geographies like Shin Cheung Tong Kak Yeu Chi Seung Ram, Tong Eui Po Kam, etc. Because of this strenuous effort, they were able to collect and retrieve lots of books and materials between 1608 and 1623. Majority of the published books were of Confucianism(13) which were followed by Political and Legal items(5), Historical documents(3), literature (3), etc. Regarding our library history, one should never forget Kwang-Hae-Kun's significant and remarkable contribution to it.

• Korea Journal of Hospital Management
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• v.23 no.1
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• pp.16-27
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• 2018

1) Purpose : The purpose of this research is to identify the trend of job stress of hospital nurses based on last 10 years of domestic research and to suggest directions for systematic future research. 2) Methodology : 101 studies between 2006 and 2016 were selected using key words such as registered nurse and job stress from Academic Information Service(Riss4u), the National Assembly Library and Korean studies Information Service System(KISS). 3) Findings : The researches on job stress of hospital nurses were increasing. The result showed that job stress increased for shift nurses. Especially, nurses of small-medium sized hospital showed remarkable effects to organization such as turnover intention. In addition, although the importance of approach to management is emphasized, there is little research on these aspects. 4) Practical Implications : It is necessary to develop systematic research on job stress directly effecting turnover intention of hospital nurses from hospital management aspect. The development of job stress measuring tools reflecting the characteristics of the medical institution, and the human resources management plan to resolve the imbalance in manpower for nurses should be required.

• Journal of the Korean Society for Library and Information Science
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• v.36 no.2
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• pp.73-87
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• 2002

Public library statistics can be a useful tool for measuring public library resources and services and also supporting management process including planning and policy development. This study attempts to present an advanced national public library statistics system to report accurate description of public library situation. Main user groups and useful areas of public library statistics were identified through literature review, and the emerging trends of public library statistics systems at the national and international levels were summarized. Current public library statistics system, annually collected and published by the Korean Library Association, was analyzed and ways for the improvement were suggested particularly in the aspects of validity, reliability, consistency, currency, and utility.

• Journal of Digital Convergence
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• v.12 no.2
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• pp.327-333
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• 2014

Recently, most of computing technology is based on web. Therefore, the users register web services or needed resources, and they can find and use the registered item. These services can be used alone or can be used in combination. When the item is used in combination, the ordering and association of service is important, and an ontology that defined association of services is required. In this paper, we define association of services based on ontology, and propose a method that can be used by services integration. The proposed method provides an efficient retrieval service by compositing the ontology with the service area and data association area.

• Journal of Information Science Theory and Practice
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• v.6 no.2
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• pp.6-23
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• 2018

Digital Science's Dimensions is envisaged as a next-generation research and discovery platform for more efficient access to cross-referenced scholarly publications, grants, patents, and clinical trials. As a new addition to the growing open citation resources, it offers opportunities that may benefit a wide variety of stakeholders of scientific publications, from researchers and policy makers to the general public. In this article, we explore and demonstrate some of the practical potentials in terms of cascading citation expansions. Given a set of publications, the cascading citation expansion process can be iteratively applied to a set of articles so as to extend the coverage to more and more relevant articles through citation links. Although the conceptual origin can be traced back to Garfield's citation indexing, it has been largely limited, until recently, to the few who have unrestricted access to a citation database that is large enough to sustain such iterative expansions. Building on the open application program interface of Dimensions, we integrate cascading citation expansion functions in CiteSpace and demonstrate how one may benefit from these new capabilities. In conclusion, cascading citation expansion has the potential to improve our understanding of the structure and dynamics of scientific knowledge.

• Journal of Technology Innovation
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• v.6 no.2
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• pp.122-158
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• 1998

This study empirically examined different patterns of collaborative R&D project with their key success factors(KSFs), using data from 82 projects in the Korean electronic parts industry. The patterns of R&D collaboration were categorized into 4 types by two criteria development motive(technology Push/market pull) and Project initiator (focal firm/partner). The bivariate relationships revealed that project characteristics (technological complexity, market uncertainty), management characteristics (participation in project formulation), problem solving characteristics(problem solving performance of the focal firm, users active role in problem solving, active role of university or research institute in problem solving) and success rates appear to be different among four types of collaboration. Each type of collaborative R&D projects also had different KSFs. The KSFs of type 1 (technology Push and focal firm initiation), for instance, include the strategic importance of the project, focal firms share of cost, active role of university or research institute in problem solving, while those of type 4(market pull and customer initiation) cover reliability of partner relationship, a time at partners involvement, information sharing. The findings suggest that the different contingencies brought different patterns and KSFs of collaborative R&D project, since different information, resources, and partners roles were needed to successfully implement the projects according to development motive and project initiator Finally, managerial, policy, and theoretical implications for the collaborative R&D activities in the Korean electronics parts industry were discussed, based on empirical results of this study.