• Journal of Korea Society of Industrial Information Systems
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• v.1 no.1
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• pp.153-176
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• 1996

The new field of learning control devleops controllers that learn to improve their performance at executing a given task, based on experience performing this task. the simplest forms of learning control are based on the same concepts as integral control, but operating in the domain of the repetitions of the task. This paper studies the use of such controllers ina decentralized system, such as a robot with the controller for each link acting independently. The basic result of the paper is to show that stability of the learning controllers for all subsystems when the coupling between subsystems is turned off, assures stability of the decentralized learning in the coupled system, provided that the sample time in the digital learning controller is sufficiently short.

• 한국정보디스플레이학회:학술대회논문집
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• 2000.01a
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• pp.53-54
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• 2000

Measurements of the direct current resistivity, on multiwalled carbon nanotubes(MWNT) for field electron emitter source that had been screen printed in a thick film form were made as a function of temperature T in the range of 1.7K-390K. In this measuring temperature range, the electrical resistivity for the MWNT show that the main contribution to the conductivity comes form carries that hop directly between localized states executing variable range hopping processes. This thick-film form system for large area display showed a high bright light emission as well as very low turn-on field as like an individual MWNT system at room temperature. Furthermore, the electron emission characteristics followed well typical Fowler-Nordheim conduction under the vacuum.

• Proceedings of the KIEE Conference
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• 2002.07d
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• pp.2521-2524
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• 2002

In this paper, We propose an Image processing algorithm for a paper-cup inner defect inspection. First, we devide a cup image to four sections considering the characteristic of a cup and filter noises limit by using the flood-fill algorithm and median filter. Second, to obtain the clearer inspection result of the edge point inner cup, We apply the sharpening convolution filer to the objected inspect the edge points by using the LOG edge detector. Third, executing sub-pixel operation with the orignal image, we find the defect parts in the cup. Finally, denoting the inspected defect parts as rectangular, we recompose the images of the defected ones.

• Journal of the Korea Safety Management & Science
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• v.6 no.3
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• pp.121-130
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• 2004

This Study will introduce the concept of CTP(Capable-to-Promise) Algorithm, CTP process, and the modeling of algorithm. This research is based on the environment of using Job-Shop method. CTP algorithm model use LPST(Latest Possible Start Time) and EPST(Earliest Possible Start Time) method especially. It is important part of executing CTP system. The CTP modeling and implementing develops to system which is able to implement in the various business environment through additional and continuous research.

• Journal of the Korea Safety Management & Science
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• v.8 no.1
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• pp.65-84
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• 2006

This study was to suggest the necessity of depth research in order to enhance the effectiveness of technical consulting system. And the purpose of this study was to decrease the construction accidents to some extent, being on the increase day by day as it takes issue properly and suggest a reform measure. As for research method, it executed the collection of public opinions widely and questionnaire with the bibliography, expert of construction safety, the related institutions, academic world, safety association, and director of construction site. Also, it was to suggest the reform measure by the stage, classifying the problems on the system and operation by 4 stages like a stage of delivery of subscription and supervision, a stage of contract with guidance of technology, a stage of executing the guidance work of technology, and a stage of performance of advice.

• Proceedings of the Safety Management and Science Conference
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• 2003.11a
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• pp.117-127
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• 2003

This Study will introduce the concept of ATP(Available To Promise) and CTP(Capable to Promise) through the existing study , the process analysis of CTP(Capable to Promise), the modeling of algorithm and the embodiment of system. This research considers the environment of using Job-Shop method. The CTP algorithm models espicially through using LPST(Latest Possible Start Time) and EPST(Earlist Possible Start Time) method. It is important part of executing CTP(Capable to Promise), The CTP(Capable to Promise) modeling and implementing system develops to system which is capable to implement in the various business environment through addational and continuous research.

• Proceedings of the Safety Management and Science Conference
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• 2012.04a
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• pp.1-11
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• 2012

Risk Assessment, a basis of health and safety management system, is an calamity prevention activity which regularly measure the level of a risk to passively improve potential hazard. A problem, the assessment not being improved to be applied to the construction work site where requires diversity and complexity, causes the assessment to be inefficient to bring quality results. A study on the investigates and compares the surveyed degree of recognitions of workers who works in companies executing the risk assessment By the investigation and comparison, it is expected to bring the better solution for early and efficient application for those companies which are not taking the risk assessment.

• Proceedings of the KSR Conference
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• 2008.06a
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• pp.417-422
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• 2008

The DC high speed circuit breaker used in Seoul Metro for line no.1.2 is Japan HITACHI and FUJI breaker, and for line no.3.4 is Whipp & Bourne MM74 breaker from UK. The years that each breakers made are 1973(line no.1), 1984(line no.3.4), So that equipments are superannuated. Nowday the for equipment exchanging is executing, equipment for exchanging were used the Secheron breaker from Swiss. but now the Intec breaker made in Korea is used. The RTU of supervisory control and data acquisition system have the capabilities that can observe, control and work the installation efficiently. In this paper, as summarizing the solving process of problem that happened the SCADA system when old-equipment exchange and concerned point for logical supervision and control of reservation factors and equipment, I'll provide the direction that can do receiving-process of control-equipment, progressed with the exchange of old-electronic equipment.

• Journal of Digital Convergence
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• v.6 no.1
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• pp.63-73
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• 2008

The present study attempted to explore effective scanning and monitoring in process of risk management on agri-marine products distribution policy. The interest public's group interests clash in accordance with theme for issue on marking policy. For executing a better systematic scanning and monitoring on actual affairs of marketing, selecting information personnel, gathering and analysing information, issue and risk management and their valuation with ongoing and simultaneously. Especially, In order to explore effective scanning and monitoring as a model of risk management, the study attempted to analyze within and without environment of marketing, to analyze issue management strategy, to evaluate issue activity for likelihood and impact, risk cycle analysis, interest public's group concerned, grade of interest public's group threatened(power, legitimacy, willingness), rapport(staying close, credibility, meeting expectation). And the study make an ongoing observation progress of subjects, and the serious subjects need have made an close observation. The study suggested to establish friendly relationship between organization and interest public's group, and to regularly accomplish two-way symmetric communication.

• Journal of the Korea Society of Computer and Information
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• v.5 no.4
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• pp.69-75
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• 2000

This paper proposes a network intrusion detection model which can detect the insertion and evasion attacks. These attacks can be prevented when some kind of information are available in the network intrusion detection system. We classified these information with three categories and used each category at setup phase and executing Phase. Within the proposed model, all necessary information which are related with networks and operating systems are maintained in the database and created as a table. This table is used during intrusion detection. The overheads of database and table may be simple in this model.