• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년 학술대회 논문집 정보 및 제어부문
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• pp.518-520
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• 2006

Due to the rapid popularization of mobile multimedia devices and the Internet as well as the realization of high-speed data transmission and large-volume data recording media, high quality content distribution and ubiquitous information services are making progress and a new type of information distribution and network sharing service has gradually emerged into the market. It is capable of utilizing terabyte sized home servers also in private homes. Under these circumstances, in distribution of content over shared networks, it is crucial to establish DRM (Digital Rights Management) technologies to protect the content from illegal copying and usage. A truly successful DRM system must be built on open worldwide specifications and provide maximum interoperability and user acceptance. An open interoperability of DRM is able to construct highly expandable PKI based DRM, targeting usage between systems, considering the expansion of recent content distribution services and clients This document gives protocol specifications for the exchange of rights information between the DRM module, description of specifications for rights information and encrypted content formats.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1994년도 Proceedings of the Korea Automatic Control Conference, 9th (KACC) ; Taejeon, Korea; 17-20 Oct. 1994
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• pp.229-231
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• 1994

For the effective use of satellite communication transponder, tests for the payload system such as IOT(In-Orbit Test), RPM(Routine Payload Monitoring), CSM(Communicatios System Monitoring), and REV(Remote Earth-Station Verification) have to be conducted. Those tests are used in order to verify the condition and generic design of the satellite, to provide a database for operational calculations, and to maintain the quality of communication services. As the satellite communication system gets with wider expansion with higher complexity of operation, tests for the communication system also need more complex operation that usesophisticated computer-controlled measuring system. For and C language based measurement functions, which uses GPIB protocol and SCPI commands. But SICL requires knowledge of BASIC and C language as well as GPIB and SCPL system. This paper introduces a new language called CALSTEP-Control and Access Language for the Systems of Test Equipment and Payload. This language is designed for the operator to perform the tests for the satellite communication system without any special knowledge that is mentioned above. This language has very limited number of commands which are to be used to control the payload system and test equipments to perform IOT and CSM, and those commands are very readable and easy to understand, so an operator without any knowledge of BASIC and C programming language, or SICL and SCPI command can use it.

• 한국시뮬레이션학회논문지
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• 제16권2호
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• pp.9-15
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• 2007

인터넷이 급성장하고 멀티미디어와 같은 대용량 데이터의 사용이 증가함에 따라 스토리지 시스템은 스토리지가 서버에 직접 연결되어 있던 DAS에서. 스토리지를 별개의 전용 네트워크로 연결한 SAN, 그리고 스토리지가 IP 네트워크에 연결되어 파일 서비스 기능만 전담하는 NAS로 발전하게 되었다. 그러나 SAN과 NAS를 독립적으로 사용하면 다양한 기업의 요구를 충족시키지 못한다. 그래서 등장한 것이 SAN과 NAS의 통합이다. 본 연구에서는 SAN과 NAS의 통합 방법의 하나인 MCI(Metadata server and Cluster Interation)를 바탕으로, MCI의 구현과 확장에 따른 비용 증가 문제를 해결하기 위해 GMC(Group Master Cahce)라는 개념을 제안하여 보다 효율적인 데이터 공유 방안을 제시한다. CMC의 기본 개념을 소개하고 기존의 MCI와 새로 제시하는 GMC를 컴퓨터 시뮬레이션을 통해 성능 측면에서 비교 분석하였다.

• Journal of Forest and Environmental Science
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• 제32권2호
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• pp.173-181
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• 2016

This study designed a model of the efficient production schemes and raw materials transportation optimization of current South Korean's simple and monolithic distribution system of wood to build a SCM (supply chain management) as a basic level to establish a distribution of future by pellet production of raw materials costs and reduce transport costs, and specifically to forest of pallet to contribute to revitalizing the market. The result of each transportation costs after building the best transportation network from raw material supply area to demand area applying transport law was 964,600 thousands Won from 6 supply areas to 7 demand areas. And the result of each model's analysis to get the pellet's efficient production through production cost reduction showed that it reduced from 325,701 Won/t to 240,106 Won/t, results of existing efficient pellet for the production model 8,233 tons over 20,000 tons annual production capacity from the size of the expanded production capacity when the expansion. However, when the production size expanded to 50,000 Tons of the production, the effect was very small even though production cost decreased.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2003년도 추계종합학술대회
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• pp.145-148
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• 2003

MPLS는 차세대 네트워크의 발전에 있어서 중요한 기술 중 하나이다. MPLS는 2계층의 스위칭 속도와 3계층의 라우팅 기능을 접목한 3계층 스위칭 기술의 일종으로, 짧고 고정된 길이의 레이블(label)을 이용하는 단순한 레이블 스위칭 방식을 사용한다. 이런 방식을 이용하는 MPLS는 성능대 가격비를 낮추면서 2계층의 속도, 3계층의 확장성, 기존 프로토콜과의 호환성 등 각 계층의 장점을 그대로 유지할 수 있다. 이슈로 부각되고 있는 트래픽 엔지니어링, VPN(Virtual Private Network), QoS 등을 쉽게 지원할 수 있다는 것이다. 본 논문에서는 MPLS를 기반으로 한 small 상호연동망을 구현하여 성능을 분석하고자 한다.

• 한국통신학회논문지
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• 제29권5A호
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• pp.545-553
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• 2004

네트워크 환경의 발전과 더불어 멀티미디어의 확대는 HDTV와 같은 응용 서비스의 보편화를 요구한다. 이러한 상황에서 핸드폰과 같은 무선통신 시스템과 xDSL과 광케이블에 의한 유선통신 시스템에서 멀티미디어 실시간 처리는 필수조건이다. 그러므로 본 논문에서 영상정보에 대해서 최소의 평균 부호장을 가지며 순간적 디코딩 능력이 뛰어난 허프만 부호화와 압축 수행속도가 우수한 렘펠-지브 알고리즘의 장점을 접목하여 채널 전송률 및 압축과 정중의 처리속도를 증가시키기 위하여 최적 메모리 할당 기법을 HDTV의 엔트로피 부호화기에 적용하여 설계하고 검증하였다. 구현된 최적 메모리 할당 기법을 사용한 엔트로피 부호화기 시스템은 메모리 포화를 방지할 수 있기 때문에 기존 시스템에 비하여 동영상에 대한 압축률이 허프만 부호나 LZW에 비하여 우수하다는 것을 확인하였다.

• 한국의류학회지
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• 제27권1호
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• pp.123-133
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• 2003

The specific objectives of the study were as follows: 1) To investigate the composition system (design, usability and interactivity) of web sites of textile exchange of B to B 2) To examine and valuate contents and marketing (announcement, satisfaction and variety of contents) of web sites of textile exchange of B to B. The data were collected from search engine, portal sites of evaluation, direct contact, interview over the phone with web master of concerned web sites and the result of analytical valuation of web sites. The results of this study were as fellows: 1) The Dongsung trading intended to mainly use their homepage as a inside communication place by intranet network. The Daechang trading was mainly using their homepage as a tool of expansion of their outside export market. The etextiler was selling their web solutions through homepage. The texcom was offering the web place and useful informations to trading companies in Asia. 2) The texcom consisted text with little image to speed up for loading and navigation for usability of users. The Dongsung trading made intranet network for communication and exchange of informations of company inside. The etextiler offered a booking menu to inquiry in homepage. The Daechang trading tried to give good impression from the introduction page at homepage.

• 한국정보시스템학회지:정보시스템연구
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• 제24권1호
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• pp.1-25
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• 2015

Social Network Service (SNS) has been played an important role in the life with the expansion of the modern technology in the cellular communication. More knowledge and understanding should be inevitable even if companies have taken advantage of SNS through word of mouth as one of the new paradigm. In most cases the crucial benefit or peculiarity of SNS has been overlooked because only general aspects of SNS have been applied in the online situation. As a result of this, same paradigm has been considered in reality as SNS was just used one of the marketing tools. However, essential aspects of SNS were investigated to see the relation of usage intention and word of mouth in this study. The hypothesis of the effect of continuous intention of the usage, trust and word of mouth was made and reviewed statistically. The statistical analysis showed there was significant among relationship, context, perceived service quality and continuous intention of the usage. In addition to that, self-expression, relationship, perceived service quality and trust were significant. Finally the continuous intention of the usage and word of mouth was significant as well. Based on this study, SNS provided by the companies could be effective to the customers in terms of word of mouth while different trend was shown in terms of trust.

• 대한산업공학회지
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• 제39권4호
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• pp.253-259
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• 2013

Investment scenarios in the transportation network design problem usually contain installation or expansion of multi-mode transportation links. When one applies the mode choice analysis and traffic assignment sequentially for each investment scenario, it is possible that the travel impedance used in the mode choice analysis is different from the user equilibrium cost of the traffic assignment step. Therefore, to estimate the travel impedance and mode choice accurately, one needs to develop a combined model for the mode choice and traffic assignment. In this paper, we derive the inverse demand and the excess demand functions for the multi-mode multinomial logit mode choice function and develop a combined model for the multi-mode variable demand traffic assignment problem. Using data from the regional O/D and network data provided by the KTDB, we compared the performance of the partial linearization algorithm with the Frank-Wolfe algorithm applied to the excess demand model and with the sequential heuristic procedures.

• 한국실내디자인학회논문집
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• 제32호
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• pp.64-71
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• 2002

Today, term of ‘industrial society’means the totally changing society by new technical innovation through the Industrial Revolution begun in England at the mid-nineteenth century and it made social structure centering agricultural culture change with industrial culture with expansion of goods by the massive production. Information working area has to bo a space not just for improving business efficiency in industrial society but for developing efficiency in working in harmony with the information and structural aspects based on computer and communication technology. There are two kinds of environmental elements of working space : the tangible ones are the area and the structure of working space, lights, network, layout and information machines in office, the intangible ones are a feeling of satisfaction of management and arrangement of office information machines capability of information delivery, common ownership of documents and their files, the security and connection between office workers, and harmony. According to the wave of information begun from the late twentieth century, structural layout of working area has become various by the working type through network of new developed information communication machines. But it is hard to apply them in actually.