• Proceedings of the Korea Contents Association Conference
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• 2007.11a
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• pp.899-902
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• 2007

Maya is known as the best program in the 3D graphic. Currently maya program is used from movie and TV program production. In this paper, we study skeleton setup techniques using support joint. This techniques are useful generation and development of various behavior of human body.

• Journal of Institute of Control, Robotics and Systems
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• v.6 no.10
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• pp.911-917
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• 2000

As many sensors and actuators are used in various automated systems, the application of network to real-time distributed control system is gaining acceptance in many industries. In order to take advantages of networking, however, the network should be carefully designed to satisfy real-time distributed control. This paper presents an implementation method of closed-loop control using Profibus-FMS. In order to implement a closed-loop control system, we used industrial computers with Profibus-FMS network cards and a DC servo motor. Through various experiments, the step response of the control system with network was compared with the reference response without network.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2000.11a
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• pp.717-720
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• 2000

Event-driven communication protocols such as CAN(Controller Area Network) have inherent packet delays due to the contention process for the use of network medium. These delays are stochastic in nature because most packets arrive at random time instants. The stochastic property of the delay adversely influences the control system's performance in terms of stability, responsiveness and steady-state error. Another problem for safety-critical application such as brake-by-wire systems is the reliability of the communication modules that can fail abruptly. This paper deals with two methods to overcome the above problems : (i) scheduling method that can maintain packet delays under some acceptable level, and (ii) redundancy management of communication modules that prescribes dual-redundancy modules' behavior when one of them fails.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2000.05a
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• pp.647-650
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• 2000

For the failure diagnosis of industrial system like various manufacturing systems, power plants and etc, many failure diagnosis approaches are considered. Here we are focus on the DES approach for failure diagnosis. We treats of failure recovery problem that is euly not mentioned in DES approach. The procedure to design a recoverable diagnoser is presented. And the recoverability, necessary and sufficient condition fur recoverability are defined. Then we make the high-level diagnoser to reduce the state size of recoverable diagnsoer. Finally, a pump-valve system example is presented.

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 1991.10a
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• pp.188-191
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• 1991

통신망의 가용율을 최대로 유지시켜 가입자에게 만족스러운 서비스를 제공하기 위해서는 통신망을 실시간으로 감시하여 망에서 발생하는 장애 및 과부하 트래픽을 망차원에서 관리해 주어야한다. 그러나 현재 운용중인 운용시스팀의 대부분이 특정기종의 통신설비 및 서비스제공에 관련된 시스팀들로서 망차원에서 통신망을 효율적으로 관리하기에는 미흡한 점이 많이 있다. 본 논문에서는 통신망을 최적의 효율로 운용하기 위한 망관리의 개념에 대해 설명하고 망차원에서 통신망을 관리하기 위해 필요한 지역망관리 시스팀의 일환으로 개발한 지역망 감시 시스팀(RNNS:Regional Network Monitoring System)의 구조 및 설계방법과 아울러 본 시스팀에서 구현한 망감시 기능에 대해 논한다.

• 제어로봇시스템학회:학술대회논문집
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• 2000.10a
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• pp.111-111
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• 2000

The research of network system, being used to reduce automotive wiring harness, is reaching to the development of by-wire system. It is by-wire system that apply IVN(In-Vehicle-Network) to steering, braking system, and it has the advantage of mass-decreasing, easy to diagnose fault and so on. But until now, many developed device can't satisfied with reliability that system have ever had. So redundancy of each network module, i.e., It is only way to make backup module. This paper researches development of network module and redundancy management of backup module when error occurred for implementation of brake-by-wire system.

• 한국항공운항학회:학술대회논문집
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• 2015.11a
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• pp.237-241
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• 2015

After it first opened in 2001, Incheon International Airport (IIA) has grown into a world-class airport, leaving remarkable traces, such as being the first airport to win the ASQ Airport Serivce Price for 10 consecutive years. However, ever since its birth IIA has tried to position itself as the leading hub airport of Northeast Asia. Until this day, it has not been meeting this goal, with transfer passenger numbers and transfer rates decreasing recently. This study looks at the outer environment to discover which factors affect IIA's transfer market. Through extensive research on external analysis, the study will eventually provide a counter strategy guideline for fighting back against decreasing transfer usage.

• Magazine of the Korean Society of Agricultural Engineers
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• v.40 no.6
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• pp.89-94
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• 1998

Stock(1992) had developed the graph for solving the penetration depth, tieforce of anchor and maximum bending moment of sheet-pile wall for cantilever and free earth supported anchored wall. Kim(1995) had developed graph for design of fixed earth supported anchored wall. In this paper, the simplified formulas for calculating the penetration depth, tieforce of anchor and maximum bending moment of sheet-pile wall was developed for fixed earth supported anchored wall in sand. The developed formulas may be helpful for design or sheet pile wall.

• Proceedings of the KIEE Conference
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• 1994.07b
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• pp.1625-1627
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• 1994

A potential to effective ozone generation for 4 kinds of gap, a hole-to-plate gap, a hole-to-hole gap, a hole-to-rod gap and a plate-to-plate gap in tap water has been investigated. It is found that the hole gaps indicated higher ozone generation compared to that of the plate-to-plate gap. As a result, the hole gaps could be an effective means to generate ozone in water by utilizing both of one generation mechanisms of the discharge and the electrolysis.

• Proceedings of the Korean Geotechical Society Conference
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• 2009.09a
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• pp.1425-1434
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• 2009

This study was aimed at comparing and assessing SPT-N values both measured by automatic and manual record devices of Standard Penetration Test. As a result, energy efficiency of hammer was approximately 62.9%, meaning SPT-N value measured by automatic recording device showed relatively accurate performance that the one done by manual device. Given the relations between hit frequency of automatic recording device and intrusion, the characteristics of stratum are expected to be proved in more accurate way. Additionally, higher confidence level seems to make it preferred and quality assessment method.