• 한국멀티미디어학회:학술대회논문집
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• 한국멀티미디어학회 2012년도 춘계학술발표대회논문집
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• pp.166-167
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• 2012

High packet loss rate and impatience of messages passing through optical switches are essential characteristics in Optical Burst Switching system equipped with Optic Delay Lines buffer, which have not been solved efficiently yet by current existing models. In order to capture both effects, this paper introduces an analytical model from the viewpoint of classical queuing theory with impatient customers. We then apply it to evaluate and compare two wavelength-sharing cases, (1) all delay lines share a common wavelength resource and (2) each wavelength is associated with a number of delay lines. Our numerical results suggest to implement the first case because of lower packet loss rate for a fairly broad range of traffic load.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2009년도 춘계 학술대회 제21권1호
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• pp.179-180
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• 2009

최근 3차원 공간 및 설계 정보를 기반으로 건설 프로젝트의 생애주기에 걸쳐 참여주체들이 효과적으로 정보를 공유하고 관리할 수 있도록 하는 협업환경 내에서 토목 구조물에 대한 3차원 모델링 데이터와 구조해석 프로그램과의 연계방안에 대한 연구를 수행하였다. 이 연구에서는 특히 PSC박스 구조물에 대하여 3차원 모델링 데이터와 해석프로그램간의 연계방안 및 그 해석기법에 관하여 논하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 하계학술대회 논문집 A
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• pp.572-574
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• 2004

The configuration of Distribution Automatic System(BAS) is dual servers and raid 5(redundant arrays of inexpensive disks) clustering dual HDD. The DAS has the distributed object-oriented architecture using middleware software(BASEstar), so the number of client nodes has no limitation. Because the DAS is scalable, it can be configured using various application programs and be upgraded easily. The DAS has competitive to export because there are system development and accumulation of technology that coincide in International Standard, using common 05 and DB. This paper describes the structure of DAS hardware and software separately and proposes to improve program to share real time DB efficiently at each node.

• 한국멀티미디어학회논문지
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• 제18권7호
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• pp.873-885
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• 2015

Today, It is difficult to search the various and numerous information efficiently. For this reason, Semantic Web emerged to provide searching services more easily through the structuring of a variety of unstructured format data and the definition of meaningful relationships between information. Especially, definition of relationship and meaning among resources is significant to share and infer related information. Ontology modeling plays just that role. Weapon parts development information is unstructured and dispersed all over. There are many difficulties in finding desired information, leading to getting improper outcomes. In this paper, we present an intuitive ontology model with weapon parts development information including the multi-dimensional information analysis and expansion of the relevant information. This study build up a ontology model through creating class and hierarchy about parts information and defining the properties of classes with Ontology Development 101[1] procedures using Protégé tools. The ontology model provides users with a platform on which search of needed information can be easy and efficient.

• 한국멀티미디어학회논문지
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• 제20권11호
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• pp.1785-1792
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• 2017

Generally, big data contains sensitive information about individuals, and thus directly releasing it for public use may violate existing privacy requirements. Therefore, privacy-preserving data publishing (PPDP) has been actively researched to share big data containing personal information for public use, while protecting the privacy of individuals with minimal data modification. Recently, with increasing demand for big data sharing in various area, there is also a growing interest in the development of software which supports a privacy-preserving data publishing. Thus, in this paper, we develops the system which aims to effectively and efficiently support privacy-preserving data publishing. In particular, the system developed in this paper enables data owners to select the appropriate anonymization level by providing them the information loss matrix. Furthermore, the developed system is able to achieve a high performance in data anonymization by using distributed Hadoop clusters.

• 디지털산업정보학회논문지
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• 제8권4호
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• pp.121-127
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• 2012

In this paper, we propose a new beamforming method which is used in Multiple User-Multiple Input Multiple Output (MU-MIMO) system. An experimental system consists of LTE based TDD base-station which has 2 MIMO elements each of which contains 10-array antennas and 2 mobile terminals each of which has a single antenna. We demonstrate that the Multiple Access Interference can further be reduced by appending a beamforming procedure in MU-MIMO system in which various users share a given channel resource. The proposed algorithm is the ordinary Lagrange beamforming algorithm combined with Zero-Forcing. It is demonstrated that the proposed beamforming method outperforms a conventional method which is the ZF at least by 8dB in terms of SNR through computer simulations. From experimental tests, we verify the feasibility of the proposed beamforming algorithm for realizing a practical LTE based TDD base-station for utilizing channel resources more efficiently.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1996년도 추계학술대회 논문집
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• pp.509-513
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• 1996

The information technology of computers and computer tools have become so powerful that virtual enterprises are not just concepts any longer The virtual enterprises comprise distributed facilities and it is necessary to have a collaborative system among them. This paper proposes the modeling process of web-based collaborative system in the distributed manufacturing environment. It also presents the information infrastructure in order to communicate and to share the information more efficiently among the collaboration subsystem. The web-based collaborative system consists of four processes: 1) product design, 2) procurement of DB information, 3) query process, and 4) negotiation. The proposed web-based collaborative system will be implemented with network technologies.

• 한국전자통신학회논문지
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• 제5권2호
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• pp.185-192
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• 2010

P2P 기술은 분산 환경에서 자원을 보유한 개인은 효율적으로 공유하는 측면에서 활용도 높은 분야이다. P2P 시스템은 자원 검색, 전송 재전송 작업이 발생됨으로 인해 네트워크 트래픽이 과다하게 발생된다. 이에 관한 성능 향상을 목표로 많은 연구가 진행되고 있다. 이러한 성능 향상의 다양한 방향성 가운데 사용자 입장에서의 사용성 개선 측면이 최근 중요한 부분으로 대두되고 있다. 이에 본 연구에서는 사용성 개선을 위한 P2P 그룹 검색 알고리즘을 제안한다.

• 정보화연구
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• 제10권1호
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• pp.1-11
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• 2013

Various computing systems are used in naval ships. Since each system has a single purpose and its applications are tightly coupled with the physical machine, applications cannot share physical resources with each other. It is hard to utilize resources efficiently in conventional naval shipboard computing environment. In this paper, we present an integration architecture for virtualized naval shipboard computing systems based on open architecture. Our proposed architecture integrates individual computing resources into one single integrated hardware pool so that the OS and applications are encapsulated as a VM. We consider the issue of varying needs of all applications in a naval ship that have different purposes, priorities and requirements. We also present parallel VM migration algorithm that improves the process time of resource reallocation of given architecture. The evaluation results with the prototype system show that our algorithm performs better than conventional resource reallocation algorithm in process time.

• 한국실내디자인학회:학술대회논문집
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• 한국실내디자인학회 2004년도 추계학술발표대회 논문집
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• pp.159-162
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• 2004

The globalization through sport has its own positive point, because its speed can proceed faster than the other area. For twenty-five years long Soccer has influenced people all of the world not only as a role of the most enjoyable sport, but also as a role of the most important position in politics, economics and social fields. Moreover, soccer has comprised transcendentally within region, race and nation which has made a big market share in leisure industry. By completing this research, the Sport Exhibition should be defined innovatively as a place that enables people actively to develop their creativity. Some of overseas sport exhibitions were selected as a sample in this study, such as The National Football Museum in England, Cornilon Nord Saint Denis in France and Sir Matt Busby Way Old Trafford Manchestrer Ml6 ORA in England, which produced an experience based exhibition. Here this study is purposed to establish, efficiently, the history of korean soccer and FIFA Worldcup as a part of construction for 2002 FIFA Worldcup exhibition and to define its conceptional characteristics composition of planning and schematic design than to play a role as basic study of architectural space.