• 한국문헌정보학회지
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• 제40권3호
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• pp.263-287
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• 2006

정보매체와 정보환경의 변화에 따라 전통적인 도서관은 디지털도서관으로 진화발전하고 있다. 따라서 디지털 환경에서 급증하는 다양한 전자정보자원을 효율적으로 관리하기 위한 종합적인 시스템이 필요하다. 본 연구에서의 전자정보자원으로는 전자저널, 웹 데이터베이스. 전자책, 오픈엑세스 자원 등을 대상으로 하였다. DLF의 ERMI를 분석하여 국내 디지털도서관 정보관리자를 위한 ERMS를 구축하는 것이 연구목적이다. 이를 위해 본 연구에서는 전자정보자원의 다양한 생성주기, 구독모델, 수록범위, 정보제공자를 조사하여 ERMS를 설계하고 구현하였다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권9호
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• pp.4320-4333
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• 2017

Energy-efficient virtual resource allocation algorithm has become a hot research topic in cloud computing. However, most of the existing allocation schemes cannot ensure each type of resource be fully utilized. To solve the problem, this paper proposes a virtual machine (VM) allocation algorithm on the basis of multi-dimensional resource, considering the diversity of user's requests. First, we analyze the usage of each dimension resource of physical machines (PMs) and build a D-dimensional resource state model. Second, we introduce an energy-resource state metric (PAR) and then propose an energy-aware multi-dimensional resource allocation algorithm called MRBEA to allocate resources according to the resource state and energy consumption of PMs. Third, we validate the effectiveness of the proposed algorithm by real-world datasets. Experimental results show that MRBEA has a better performance in terms of energy consumption, SLA violations and the number of VM migrations.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권5호
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• pp.2258-2276
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• 2019

Resource sharing is one of the main goals achieved by network virtualization technology to enhance network resource utilization and enable resource customization. Though resource sharing can improve network efficiency by accommodating various users in a network, limited infrastructure capacity is still a challenge to ultra-low latency service operators. In this paper, we propose an inter-slice resource borrowing schema based on the device-to-device (D2D) potentiality especially for ultra-low latency transmission in cellular networks. An extended and modified Kuhn-Munkres bipartite matching algorithm is developed to optimally achieve inter-slice resource borrowing. Simulation results show that, proper D2D user matching can be achieved, satisfying ultra-low latency (ULL) users' quality of service (QoS) requirements and resource utilization in various scenarios.

• 정보관리학회지
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• 제23권3호
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• pp.241-264
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• 2006

이 연구에서는 도서관에서 구독하는 전자자원의 효율적 관리를 위한 필수 전자자원 관리용 메타데이터를 제안하였다. 제안의 근거를 확보하기 위한 기초자료로 DLF ERMI 권고안을 비롯하여 해당 권고안을 제안한 연구컨소시엄에 참여한 UCLA 대학도서관, 노스캐롤라이나주립 대학도서관, Boston대학도서관의 전자자원 관리시스템의 메타데이터의 요소를 활용하였다. 이상의 기초자료를 비교, 분석하여 도출된 결과를 국내 전자자원관리담당자에 검증을 받았다. 그 결과 본 연구에서는 다음과 같이 전자자원 관리용 메타데이터 요소를 제안하였다. 트라이얼 법주는 트라이얼 URL을 포함한 총 12개 요소, 컨소시엄 법주는 컨소시엄 명을 포함한 총 15개 요소, 수서정보 범주는 부서 ID를 포함한 총 24개 요소, 라이선스 범주는 라이선서를 포함한 총 33개 요소, 전자자원 정보는 P-ISSN을 포함한 총 21개 요소, 접근/관리정보는 관리자ID를 포함한 총 20개 요소, 이용통계 범주는 이용통계 유형을 포함한 충 13개 요소, 워크플로우 범주는 워크플로우ID를 포함한 총 14개 요소, 연락정보 범주는 연락ID를 포함한 총 18개 요소이다.

• Journal of Information Processing Systems
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• 제19권5호
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• pp.590-601
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• 2023

University books are an important information resource. University book resources can be shared not only in the traditional paper form, but also electronic form under the background of the Internet. In order to better manage the sharing of electronic book resources in universities, this study put forward three resource sharing strategies: centralized sharing strategy, distributed sharing strategy, and centralized-distributed sharing strategy by analyzing the combined development of books and the Internet as well as the significance and development of book resource sharing. The centralized sharing strategy, however simple, was difficult to handle large traffic; while the resource nodes were independent and self-consistent, the distributed sharing strategy was not easy to find and had a high repetition rate. Combining the advantages of both strategies, the centralized-distributed sharing strategy was more suitable for the heterogeneous form of university book sharing. Finally, a teaching resources sharing platform for university libraries was designed based on the strategy of centralized and distributed sharing, and three interfaces including platform login, resource search, and resource release were displayed. The results of the simulated comparison experiment showed that centralized and distributed sharing strategies had limitations in resource searching and had low efficiencies; the efficiency of the centralized strategy reduced with an increase in search subjects; however, the centralized-distributed sharing strategy was able to search more resources efficiently and main stability.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제8권7호
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• pp.2350-2364
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• 2014

This paper addresses the problem of resource allocation in amplify-and-forward (AF) relayed OFDM based cognitive radio networks (CRNs). The purpose of resource allocation is to maximize the overall throughput, while satisfying the constraints on the individual power and the interference induced to the primary users (PUs). Additionally, different from the conventional resource allocation problem, the rate-guarantee constraints of the subcarriers are considered. We formulate the problem as a mixed integer programming task and adopt the dual decomposition technique to obtain an asymptotically optimal power allocation, subcarrier pairing and relay selection. Moreover, we further design a suboptimal algorithm that sacrifices little on performance but could significantly reduce computational complexity. Numerical simulation results confirm the optimality of the proposed algorithms and demonstrate the impact of the different constraints.

• 한국도서관정보학회지
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• 제22권
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• pp.205-244
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• 1995

Originally the concept of the traditional resource sharing has been discussed in the context of bibliographic materials, and has been labor-intensive and high-cost activities. The technology has had a great impact on such pattern of the resource sharing, and has expanded the limited scope of the traditional concept into the sharing of library information in the levels of local, regional and national systems, and expertise, materials, facilities, equipments and personnels of the library system. While the traditional circulation service as a basic method to share library materials by users can provide the resource to a single person at a time, the electronic resource can be shared, by multi-users at a time anytime anywhere. The maximization of the electronic resource sharing requires that publishing process should be fundamentally changed and articles, books, chapters, speech manuscripts, music scores, maps, sound, and other formats of materials should be prepared in machine readable format. This study examined the positive effects of the technology on the resource sharing, but not investigate the concrete and complex problems as to the cost, guidelines, detailed procedures, design details, and intellectual properties and protection involved in the resource sharing. Some findings extracted from the study can be summarized as follows; (1) ILL will lose its meaning as a method to share the materials if they are all in the electronic format and the phrase 'networked information resource' becomes omnipresent. (2) The technology keeps on changing the concept of resource sharing. Today, the scope of resource sharing not only encompasses the sharing of the primary and secondary materials but also the sharing of the processings(eg. cataloging), expertise, user education, special facilities, and the integrated automated library systems. (3) The sharing of the networked resource will be a method to provide better services for library users in the low cost. (4) The a n.0, pplication of the technology to the resource sharing should be focus on the method which allows an end-users to do the direct access to the needed materials, and to be delivered the primary document as soon as possible.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2005년도 추계종합학술대회
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• pp.301-306
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• 2005

In this paper, we propose P-SRA (Proposed Simplified Resource Allocation) algorithm for efficient resource allocation for real time traffic in MIMO-OFDMA (Multiple Input Multiple Output - Orthogonal Frequency Division Multiple Access) systems with V-BLAST (Vertical-Bell laboratories LAyered Space-Time coding) detector. The proposed P-SRA scheme employs efficient 3 step resource allocation algorithm with plain V-BLAST and no H-ARQ, however it achieves comparable performance of a MIMO-OFDMA system utilizing error compensated V-BLAST and H-ARQ IR scheme.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권12호
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• pp.5174-5190
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• 2016

Recent years have witnessed an explosive growth of mobile devices, mobile cloud computing services offered by these devices and the remote clouds behind them. In this paper, we noticed ultra-low latency service, as a type of mobile cloud computing service, requires extremely short delay constraints. Hence, such delay-sensitive applications should be satisfied with strong QoS guarantee. Existing solutions regarding this problem have poor performance in terms of throughput. In this paper, we propose an end-to-end bandwidth resource reservation via software defined scheduling inspired by the famous SDN framework. The main contribution of this paper is the end-to-end resource reservation and flow scheduling algorithm, which always gives priority to delay sensitive flows. Simulation results confirm the advantage of the proposed solution, which improves the average throughput of ultra-low latency flows.

• 한국문헌정보학회지
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• 제47권4호
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• pp.125-142
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• 2013

이 연구는 정보환경의 변화와 대학도서관에 있어서 전자정보원의 비중 증가, 그리고 이용자 요구의 변화 등에 따라 대학도서관에서 그 중요성이 증가하고 있는 전자자원관리정책의 모형을 제안하고자 한 연구이다. 이를 위해 우선 전자자원의 정의와 유형 전자자원관리정책의 개념과 기능, 그리고 필요성을 정의하였다. 다음으로, 전자자원관리정책의 구성요소를 도출하였는데 이를 위해 국제도서관협회연맹(IFLA)의 전자자원개발정책 가이드라인과 미국의 대학도서관들이 실제로 수립, 공개하고 있는 전자자원관리정책 사례, 그리고 관련연구들을 바탕으로 구성요소를 선정, 취합하였다. 이 결과를 종합하여 전자자원관리정책의 구성요소별 우선순위를 정하고 가상의 대학을 대상으로 전자자원관리정책 모형을 제안하였다.