• Journal of Institute of Control, Robotics and Systems
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• v.22 no.7
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• pp.570-577
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• 2016

This paper proposes the design of a novel distributed message management scheme using a message-oriented management and analysis tool (MOMAT) for naval combat system (NCS) middle-ware. If a message is not guaranteed real-time of the NCS with each node, it causes the loss of data and decreases the reliability of systems. To solve these problems, improved message management schemes are proposed. Message management schemes are considering a real-time user management scheme and a real-time traffic management scheme. The proposed schemes are simulated with a developed simulation tool, data publisher, and subscriber connected through nodes in middle-ware. The simulation results show improved results in terms of message round-trip time (RTT), End-to-End delay, and throughput.

• Proceedings of the IEEK Conference
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• 2002.06a
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• pp.89-92
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• 2002

It is important that fault management of devices which is composing network in the next-generation internet environment. It is best method of operating network safely and efficiently. In this paper, we have suggested double message broker architecture to transmit trap messages in web-based fault management system using Java technologies. The double message broker fault management system shows that manager can do its own job efficiently

• Journal of KIISE:Computing Practices and Letters
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• v.14 no.6
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• pp.609-613
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• 2008

In Large scale system, components are developed by many different developers. In such a development environment, efficiency of the development depends largely on effectiveness of interface management. In the early stage of development, many components are newly defined or modified quite often. These definitions and modifications of components cause the change of interfaces between components. If changes of interfaces are not properly managed, many developers may implement components based on different version of interfaces. This causes decrease in efficiency of development. "Message Definition and Management system (MDMS)" provides the means to cope with the inefficiency of unmanaged interface definitions and changes. MDMS automatically generates source code and Interface Design Description (IDD). The automatic generation of source code and IDD prevents the disagreement between code and documents. Furthermore, MDMS shows the overall view of message flow for a system. Based on this information, we can optimize the system identifying message bottleneck and apply to support for the performance tuning of the system.

• Management & Information Systems Review
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• v.25
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• pp.171-201
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• 2008

Previous research on negative contents of verbal message being more influential has a two broad streams as impression formation theory and negative information having an more diagnostic informational value. Therefore, this research was intended to obtain consistent results from researches by message frame segmentation of verbal message and to determine the medium of verbal message. It was proven from the research that objects influencing verbal message are being effected by the participation ratio of products and the positive indication is having more meaningful difference than the negative indication statistically unlike to the results of previous researches. Unlike just a biased positive message or negative message as the result of previous research, it was proven that the positive indication is influential regardless of sequences according to participation ratio and site participation in case of positive and negative being existing together.

• Journal of Communications and Networks
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• v.15 no.1
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• pp.54-60
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• 2013

In this paper, a novel method called location-based delivery (LBD), which combines the short message service (SMS) and global position system (GPS), is proposed, and further, a realistic system for tracking a target's movement is developed. LBD reduces the number of short message transmissions while maintaining the location tracking accuracy within the acceptable range. The proposed approach, LBD, consists of three primary features: Short message format, location prediction, and dynamic threshold. The defined short message format is proprietary. Location prediction is performed by using the current location, moving speed, and bearing of the target to predict its next location. When the distance between the predicted location and the actual location exceeds a certain threshold, the target transmits a short message to the tracker to update its current location. The threshold is dynamically adjusted to maintain the location tracking accuracy and the number of short messages on the basis of the moving speed of the target. The experimental results show that LBD, indeed, outperforms other methods because it satisfactorily maintains the location tracking accuracy with relatively fewer messages.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.10 no.6
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• pp.53-62
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• 2011

Although the demand of Variable Message Sign(VMS) has become pervasive in fulfilling the ITS policy, there are still several unsolved problematic issues. The most critical ones of them are inequality and inefficiency of providing traffic information. This paper proposes the Infra-free Variable Message Sign in order to provide useful informations such as road condition, weather, and traffic of the area, where constructing the infrastructure of communication and power supply is relatively very hard. First of all, the characteristics of infra-free Variable Message Sign are studied and analyzed in deep because of differences between normal Variable Message Sign and Infra-free Variable Message Sign in the configuration and the operating method due to the nature of the Infra-free Variable Message Sign. Futhermore, for effective power management of operating Infra-free Variable Message Sign with limited power acquired through stand-alone PV system, new battery connection structure and dynamically variable power managements for the differently shown messages on Variable Message Sign are proposed. The proposed structure in this paper can be applied to not only power management for Infra-free Variable Message Sign but also power management for the various applications using parallel connection battery system.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.61 no.8
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• pp.1140-1147
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• 2012

This paper proposes the power management technology for stand-alone PV system to extend installation environment and coverage. The proposed power management technology in this paper can protect battery safeness from overcharge/discharge with keeping the proper SOC(State of Charge) and extend using time of system through estimation of operating power. The proposed power management technology in this paper is applied to Infra-free Variable Message Sign. And performance of power management technology in this paper was verified using simulation scenario.

• Journal of KIISE
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• v.44 no.8
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• pp.749-759
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• 2017

The weapon system based on voice call can cause delay, error or damage to the message during the exchange of information. Furthermore, since the weapon system has a unique message format, it has limited data distribution. Therefore, a Korea Variable Message Format(KVMF) has been developed in this study to utilize a standard sized data format to guarantee the transmission quality and minimize the transmission amount. The ground tactical data link system quickly and accurately shares tactical information by incorporating a field management system that utilizes the KVMF standard message in the mobile weapon system. In this study, we examine the possibility of performing the mission immediately by recovering the state of network joining when a normal/abnormal termination situation of the battlefield management system occurs.

• Management & Information Systems Review
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• v.6
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• pp.21-43
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• 2001

Contract requires, on principle, a meeting of minds. The basic elements of that contact are an offer by one party and an acceptance of the terms of the offer by the other party. In the electronic commerce an offer and the acceptance of an offer may be expressed by dispach or receipt of data messages. The contract which a data messages is used in the formation may be called electronic contract. The formation of the electronic contract is regulated by the Civil Code or the Commerce Code. The time of the contract formation is regulated by the Civil Code and the Commerce Code. But the time of dispach and receipt of the data message is stated in Article 9 of the Fundamental Law on Electronic Commerce. In this article the dispatch of a data message occurs when it enters an information system outside the control of the originator or of the person who sent the date message on behalf of the originator. The time of receipt of a data message, if the adressee has designated an information system for the purpose of receiving data message, is at the time when the data message enters the designated information system; or if the data message is sent to an information system of the adressee that is not the designated information system, at the time when the data message is retrieved by the addressee; if the addressee has not designated an information system, receipt occurs when the data message enters an information system of the addressee. The time of the electronic contract formation depends on the Civil Code or the Commerce Code and this Article 9 of the Fundamental Law on Electronic Commerce. An electronic contract may be formed by an offer and the acceptance of an offer by dispach or receipt of data message. An offer can not be withdrawn after it is accepted. But in mail-order sales and installment dealing an offer can be revoked after the goods were delivered. In this case the contract is lapsed.

• KIISE Transactions on Computing Practices
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• v.23 no.12
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• pp.670-676
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• 2017

Naval combat systems use real-time processing and compositing of collected information to provide the optimal combat capabilities that maximize survival and ensure mission effectiveness. The software for a combat system has dozens to thousands of components depending on the size of the system, and the communication between the components is achieved via DDS. Although the message interface of the combat system is managed through MDMS, an increase in the system size can result in problems such as the deterioration of the development efficiency. In this paper, we implement XMDMS to operate a distributed processing environment and then solve the problem of the reduction in the development efficiency caused by a load at the server. The experimental results shows that XMDMS improves the processing delay and network performance compared to MDMS.