• Journal of Navigation and Port Research
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• v.31 no.8
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• pp.717-723
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• 2007

In recent years, the transportation sector has been undergoing very rapid and multifarious changes due to the M&A, alliances between shipping companies, introduction of larger container ship as it cost reduction measure and the application of integrated logistics to satisfy the needs of customers. Therefore, container terminal is required adequate terminal facilities, sufficient channel depth, efficient handling and low cost of port fees and dues. The purpose of this paper is for functional assessment of efficient container terminal. Firstly, the container operating process information about yard equipment and chassis is extracted through the analysis of practical daily work report of container terminal. Also, the formulae of skill factor and troubles of operator on transfer crane are defined. Lastly, container handling simulation model which consideration of skill factor and trouble of operator is proposed by Petri network model.

• Journal of Navigation and Port Research
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• v.32 no.8
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• pp.675-683
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• 2008

This paper develops a framework of combining Balanced Scorecard (BSC) and Quality Function Deployment (QFD) using Analytic Hierarchy Process (AHP) and Analytic Network Process (ANP) and evaluates the performance factors of container terminals using the framework. This study designs a BSC of container terminals and then transforms this into QFD in order to determine the priority of performance factors. This paper provides a modified QFD model and shows a causal relationship among perspectives of BSC to find out critical performance factors of container terminals. This modified QFD model is different from traditional models in that a correlation and relation matrix is presented. This combination of BSC and QFD with AHP and ANP helps to create more realistic and accurate representation of QFD models.

• Journal of the military operations research society of Korea
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• v.36 no.2
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• pp.71-84
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• 2010

This work describes capabilities based acquisition process in the SoS(System of Systems) environment. It is written as qualitative paper based on a cognitive paradigm. Future battle space is formed with grids of the various sensors and the shooters. It has been also transformed into a SoS concept which accomplishes missions and their functions through network based battle management systems in a single theater. The SoS is a set or arrangement of systems that results when independent and useful systems are integrated into a larger system that delivers unique capabilities. Therefore the acquisition process is changing over from single system requirements to capabilities based acquisition of the SoS. In this point of view, this paper analyzes functionally JCIDS, DAS and CEP which are critical elements of the acquisition process. From results of this comprehensive analysis, perspectives on the application of capabilities based acquisition suitable for Korean acquisition environment are presented.

• Journal of KIISE:Databases
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• v.41 no.4
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• pp.217-225
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• 2014

Analysis of social media such as Twitter can yield interesting perspectives to understanding human behavior, detecting hot issues, identifying influential people, or discovering a group and community. However, it is difficult to gather the data relevant to specific topics due to the main characteristics of social media data; data is large, noisy, and dynamic. This paper proposes a new algorithm that dynamically selects the seed nodes to efficiently collect tweets relevant to topics. The algorithm utilizes attributes of users to evaluate the user influence, and dynamically selects the seed nodes during the collection process. We evaluate the proposed algorithm with real tweet data, and get satisfactory performance results.

• The Journal of Information Technology and Database
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• v.1 no.2
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• pp.37-52
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• 1994

오늘날의 정보시스템 구축 방향은 대형 컴퓨터를 중심으로 수많은 단말기를 연결한 수직형네트워크 시스템에서 다운사이징과 네트워크 기술이 결합하여 분산적으로 자료를 처리하는 클라이언트/서버 시스템 구축으로 변화하고 있다. 본 연구는 모든 단말기를 통제하는 대형 컴퓨터를 운영하는 전산망에서 클라이언트/서버 전산망으로 전환하는 하나의 사례연구를 통하여 구축환경변화, 시스템구성, 경영환경변화를 분석함으로써 클라이언트/서버 시스템의 성공적인 사례를 제시하는 것이다. 클라이언트/서버 시스템으로 변환하기전에 재개발할 시스템의 목표와 방향을 설정하기 위해서 벤치마킹을 실시하였고, 이의 결과를 바탕으로 경영업무의 프로세스를 재설계 하였다. 그리고 기업의 내부와 외부자료에 관한 표준화를 실시하였다. 정보기술 투자의 경제성과 경쟁우위 확보를 위하여 클라이언트/서버 시스템을 구현하게 되었으며 판매물류, 생산물류, 그리고 재무회계에 관한 경영지원시스템으로 구성되는 종합물류시스템 이외에 영업소에 관련된 영업정보시스템과 자동창고시스템이 컴퓨터 네트워크와 관련해서 시스템을 구성하였다. 구성 전략 촛점은 리엔지니어링, 다운사이징, 그리고 벤치마킹이었다. 시스템을 재개발한 후 업무의 계획, 진행, 분석, 감리등에 관한 체계적 업무흐름이 정착될 정도로 변화하였으며, 통신방식의 확대 및 다양화로 의사소통의 원활화와 타 관련업무와 연계처리, 그리고 부서들 상호간에 정보를 공유할 수 있었다. 또한 정보기술에 의한 업무처리를 기본으로 하는 기능적 태도로 인하여 관리자와 실무자의 업무운영에 관한 사고와 의식이 변화하였다. 따라서 매출액의 증가와 종업원수가 감소되었다.

• Journal of Internet Computing and Services
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• v.14 no.2
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• pp.25-34
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• 2013

In this paper, we propose an activity-performer bipartite matrix generation algorithm for analyzing workflow-supported human-resource affiliations in a workflow model. The workflow-supported human-resource means that all performers of the organization managed by a workflow management system have to be affiliated with a certain set of activities in enacting the corresponding workflow model. We define an activity-performer affiliation network model that is a special type of social networks representing affiliation relationships between a group of performers and a group of activities in workflow models. The algorithm proposed in this paper generates a bipartite matrix from the activity-performer affiliation network model(APANM). Eventually, the generated activity-performer bipartite matrix can be used to analyze social network properties such as, centrality, density, and correlation, and to enable the organization to obtain the workflow-supported human-resource affiliations knowledge.

• The Journal of the Korea Contents Association
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• v.9 no.5
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• pp.118-127
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• 2009

The current global spread of communal residential culture and the trend of continuing increase of newly built apartment environment are increasing the demand of home network products for each residential space and among households. The continuing advancement of ubiquitous and the introduction and development of home network system are promoting the demand for the product design. The residential culture change and the apartment interior design change are having mutual effects on the lifestyle of residents and the product design and demand new product design. Coordination with interior products, interior style and products, product and fashion design and reconstruction and fusion between the products and their element factors are the core element of this design study. Based on this, integrated design strategy and concept research and analysis were studied for the design process, and have been expressed in three dimension design through which the design functionality and the external aesthetical design can correspond to each other. It's because the aspect of the future development prospect can be predicted in detail by presenting practical design plan.

• The Transactions of the Korea Information Processing Society
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• v.4 no.10
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• pp.2581-2595
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• 1997

In this paper, the real-time facility of the operating system for a VOD(Video On Demand) server have been analyzed and implemented. The requirements of the real-time scheduling have been gathered by analyzing the model of the video-data-transfer-path. Particularly, the influence of the bottleneck subsystem have been analyzed. Thus, we have implemented the real-time scheduler and primitives which is proper for processing the digital video. In performance measurements, the degree of the guarantee of the real-time scheduler have been experimented. The measured data show that the most time constraints of the process is satisfied. But, the network protocol processing by the interrupt is a major obstacle of the real-time scheduling. We also have compared the difference between the real-time scheduler and the non-real-time scheduler by measuring the inter-execution time. According to the measured results, the real-time scheduler should be used for efficient video service because the processor time allocated to the process can't be estimated when the non-real-time scheduler is used.

• Journal of Internet Computing and Services
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• v.4 no.2
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• pp.69-80
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• 2003

Program Behavior Intrusion Detection Technique analyses system calls that called by daemon program or root authority, constructs profiles, and detectes modificated anomaly intrusions effectively. In this paper, the relation among system calls of processes is represented by bayesian network and Multiple Sequence Alignment. Program behavior profiling by Bayesian Network classifies modified anomaly intrusion behaviors, and detects anomaly behaviors. we had simulation by proposed normal behavior profiling technique using UNM data.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.11a
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• pp.793-796
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• 2013

스마트폰, IPTV(Internet Protocol Television), VoIP(Voice over Internet Protocol) 등의 인터넷을 활용한 서비스의 증가는 IPv4(Internet Protocol Version4)의 주소 부족문제를 야기시켰으며 이를 해결하기 위한 장기적인 해결방안으로는 IPv6(Internet Protocol Version6)가 제시되었고 단기적으로는 NAT(Network Address Translator)가 제안되었다. NAT는 사설 IP 주소를 공인 IP 주소로 활용하여 네트워크에 접속할 수 있도록 지원하며 주소 부족 문제를 해결하고 내부 네트워크를 보호하는 긍정적인 기능도 하지만 역으로 해커들에게 숨은 공간을 제공하는 역할을 하기도 한다. 본 논문에서는 NAT 기능을 활용한 IP 공유기를 통해 내부 보안 프로세스를 우회할 수 있는 단말기를 검출하는 탐색 알고리즘을 분석하고 이를 병렬화하여 정확도를 높일 수 있는 검출 시스템을 연구하고자 한다.