• Proceedings of the Korean Society of Precision Engineering Conference
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• 1995.10a
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• pp.947-951
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• 1995

Cim realization for the machinery manufacturing plant has several problems such as a lack of the adaptibity for system integration of the production machines, a lack of the flexibility for the information flow and a lack of the interchangeability fot the variety of the interchange information. In the paper the development of VMD for the object oriented machine tool in Cim enviroment is accomplised. FOr this purpose VMD is constructed in PC with NT 3.51/OS enviroment by using the exculsive comunication board and PLC for the conventional CNC machine tool that VMD support is not available. And also RS232 interface between VMD and CNC's and DNC 2 comunication board supplied by FANUC for two types of CNC are used. This developed VMD is very useful for CIM construction in the shop floor having the multi-vendor CNC controllers.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.13 no.7
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• pp.3714-3732
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• 2019

With the rapid development of network, Intrusion Detection System(IDS) plays a more and more important role in network applications. Many data mining algorithms are used to build IDS. However, due to the advent of big data era, massive data are generated. When dealing with large-scale data sets, most data mining algorithms suffer from a high computational burden which makes IDS much less efficient. To build an efficient IDS over big data, we propose a classification algorithm based on data clustering and data reduction. In the training stage, the training data are divided into clusters with similar size by Mini Batch K-Means algorithm, meanwhile, the center of each cluster is used as its index. Then, we select representative instances for each cluster to perform the task of data reduction and use the clusters that consist of representative instances to build a K-Nearest Neighbor(KNN) detection model. In the detection stage, we sort clusters according to the distances between the test sample and cluster indexes, and obtain k nearest clusters where we find k nearest neighbors. Experimental results show that searching neighbors by cluster indexes reduces the computational complexity significantly, and classification with reduced data of representative instances not only improves the efficiency, but also maintains high accuracy.

• Journal of the Korean Institute of Telematics and Electronics S
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• v.34S no.3
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• pp.33-45
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• 1997

In this paper, we propsoe a new method of th ecommunication system for cooperative behaviors and works in collective autonomous mobile robots. A communication function among the collective robots is essential to intelligent cooperative works. In genral, global communication is effective for small number of robots. However when the number of robot goes on increasing, this becomes difficult to be realized because of limited communication capacity and increasing amount of information to handle. And also the problems such as communciation interfeence and improper message transmission occur. So we propose local communication system based on infrared sensor to realize the cooperative behavior among robots as the solution of above problem. It is possible to prevent overflow of information and exchange of complex information by fusion sign board model which transmits the information to unspecified robots and message passing model which communicate a specific robot. And we formularize optimal communication range by analysis of information propagation mechanism from the proposed comunication system. At last we verify the effectiveness of the proposed communication system from example of cooperative works.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2019.11a
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• pp.211-212
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• 2019

Since nuclear power plant accident has occurred in Fukushima, marine pollution problem has been a hot issue due to discharging of contaminated water This paper deals in the marine environment monitoring sensor system. In this paper, we study on sensor and communication system to observe the various source of maritime pollution in realtime and transmit the measured date to observation center.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.30 no.4
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• pp.283-291
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• 1994

This paper describes about the behavior of the Striped mullet (Mugil cephalus) in the setnet by telemetry techniques. The telemetry system consists of a pinger of 50KHz, three omni-directional hydrophones and ultrasonic receivers, a single board computer for the signal processing, two RF transceivers for the data comunication and a personnel computer. The fish tagged the pinger was tracked by the LBL method, and its location was calculated by the hyperbolic method. The fish escaped from sea surface to 7m deep right after release and had been swum near the sea surface after 30 minutes being released. Also, in horizontal movements, the fish stayed long time around the enterance of the square net in setnet, and showed the escaping behavior repeatly. The average speed of the fish was about 0.41m/sec(1.1 times of the body length)

• Journal of Biomedical Engineering Research
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• v.20 no.6
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• pp.621-627
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• 1999

본 논문은 언어장애인을 위한 통신보조기기의 구현에 관한 연구이다. 통신보조기기에 적용되는 어휘는 사용자의 환경을 고려하여 선택되어야 하며 사용자의 환경에는 연령, 교육정도, 가족관계, 자주 이용하는 장소, 장애의 종류와 정도 등 사용자의 정신적, 육체적 능력을 모두 포함하여야 한다. 본 논문에서는 손의 사용이 가능하고, 어휘와 의미심볼의 관게를 이해할 수 있으면서, 음성표현이 부자유스러운 어린이를 사용자로 한정하였다. 사용자에 의해 발훼된 어휘는 중심어휘와 특정환경을 나타내는 장소 도메인에서의 사용어휘로 나눌 수 있다. 중심어휘는 장소에 구애받지 않고 일상생활에서 널리 쓰이는 어휘를 말하며, 장소 도메인에서의 사용어휘로 나눌 수 있다. 중심어휘는 장소에 구애받지 않고 일상생활에서 널리 쓰이는 어휘를 말하며, 장소 도메인에서의 사용어휘는 특정 장소에서 빈번히 사용하는 어휘를 말한다. 발췌된 어휘는 휴대용 통신보조기기로서의 공간적 제약을 극복하기 위하여 어휘를 명사, 동사, 조사로 나누어 좀더 많은 문장을 만들 수 있도록 하였으며, 동적 시스템과 정적시스템의 장점을 고려하여 장소 도메인 별 어휘로 나누면서 의미함축의 원리를 도입하였다. 또한 어휘의 인식이 쉽도록 의미심볼과 어휘를 대응하여 표현하였고, 시스템의 기능 혹은 어휘분류에 따른 화면의 배경색을 다르게 설정하여 쉽게 사용자가 선택할 수 있도록 하였으며 , 사용자의 선택에 의해 구성된 문장은 화면표시관에 보여진 후 음성으로 표현하였다.

• The Transactions of the Korea Information Processing Society
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• v.4 no.2
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• pp.573-585
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• 1997

In this paper, a new architecture for communication termial system that can support multiple communication servies simultaneously in ATM enviromment is proposed , and the prototype multimedia communication ter-minal system with the proposed architecture is introsuced.The proposed architecture can be used as a solution of cheap and dffecive implementation of multimedia comunication terminal system having interoperaqbility in heterogrneous network environment, because we cinsidet the international standarsd, the technical difficulties for the system implementation, and the requirment of media qualties needed for each multimedia communi-cation services fot the system archietcture design.The introduced multimedia communication termial is designed with proposed communication terminal reference model.The system can not be the target system in the B-ISDN era.But, the system may be the most effective one that can be used as the cost dffective terminal in the present time and by present technology.

• Journal of the Korean Society of Clothing and Textiles
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• v.8 no.2
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• pp.11-17
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• 1984

The purpose of this study was to explore the characteristics of Fashion leadership in relation to social partipation, mass communication, and socioeconomic level among married women living in Seoul. Fashion opinion leadership was measured by Schrank Fashion Opinion Leadership Inventory. Fashion Preference Scale was designed to determinefashion innovativeness. Social parti-cipationana mass communication were assessed by selected items from the inventory of Summer and Kim. Hollingshead's two-factor index and weighting system was selected to assess socioeconomic level. The questionnaires were adminstered to a random sample of married women in Seoul. The date for 214 respondents were analyzed by Pearson correlation, analysis of variance, and t-teat. The results were as followers : 1) Fashion opinion leadership was significantly related to fashion preference. 2) Fashion leadership was significantly related to social participation, mass communication, socioeconomic level. 3) There was a significant difference between fashion leadership and age. 4) Women's occupation had little influence on fashion opinion leadership as well as fashion preference.

• Proceedings of the Korea Information Processing Society Conference
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• 2015.10a
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• pp.297-300
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• 2015

이 논문에서는 가축관리의 효율성을 높일 수 있는 IoT 기술 기반의 지능형 축산정보 통합관리 시스템 및 구축 방안을 제안한다. 제안한 시스템은 체온, 활동량, 군집도와 같은 개체특성 정보와 온도, 습도, CO2 농도 등의 축사환경 정보를 무선센서 네트워크를 통해 실시간으로 수집한다. 수집된 정보는 가축개체별 생애주기 사양관리 스케쥴과 연동되어 신속한 관리가 필요한 이상상황을 자동으로 인식한다. 또한, 축적된 양질의 축산지식 정보는 허가된 범위 내에서 접종사, 수정사, 수의사, 축산공무원 등 축산종사자에게 공유된다. 제안한 시스템은 대규모 축사에서 수정, 분만, 질병관리 등 사양관리 시기를 자동으로 감지하여 축주에게 알려줄 수 있기 때문에 최소한의 시간과 비용으로 가축관리 효율성과 생산성을 높일 수 있다.

• The Transactions of the Korea Information Processing Society
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• v.7 no.11
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• pp.3417-3426
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• 2000

Most of conventional mobile agent systems requre that the users or the programmer should give the mobile agenl its detail behavioral script for accomplishing the given task. And during its runtime, such mobile agents just behave acording to the fixed script given by its user. Therefore it is impossible that conventional mobile agents autonomously build their own plans and execute. There in considering their ultirnale goals and the dynamic world states. One way to overcome such limtations of conventional mobile agent systems is to develop an mielligent mobile agent system ombedding a reactive planner.In this paper, we design both a modelof agent inobility and a model of inter-agent commuication based upon the representative reactive planning agent architecture called JAM. An then we develop an intelligent mobile agent system with planing capability, IMAS, by implementing addtional basic actions for agent moves and inter-agent comunication within JAM according too the predevined models. Unlike conventional mobile agents, IMAS agents can be able to adapt, their behaviors to the dynamic changes of their anvironment as well as build their own plans autonomously. Thus IMAS aents can snow higher flexibility and robustness than the conventional ones.