• Journal of KIISE:Computer Systems and Theory
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• v.27 no.5
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• pp.518-528
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• 2000

Messages in distributed real-time systems are categorized into two groups: synchronous messages and asynchronous messages. Synchronous messages, such as sampled audio and image data,are generated periodically with delivery time constraints. Protocols should guarantee the end-to-enddeadlines for such messages. Asynchronous messages are non-periodic and may arrive in a randomway with no strict time constraints.In this paper, we propose TTP/C(timed token protocol with concession), an extension of TTPprotocol, to achieve higher timeliness guarantee for synchronous messages in distributed real-timesystems. In TTP/C, a node concedes the allocated bandwidth to other nodes with urgent synchronousmessages to be sent provided that the node has no urgent messages, TTP/C works very well evenif the synchronous messages are generated with some jittering by nodes. The simulation results showthe improved performance of TTP/C protocol for guaranteeing synchronous messages deadlinescomeared to the existing TTP protocols.

• 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.

• The Journal of the Korea Contents Association
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• v.19 no.4
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• pp.174-186
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• 2019

Twitter is very popluar with users who desire social interaction as it is a highly effective method of communicating compared to traditional communication platforms; and thus has garnered considerable interest from the academic community. This research reveals how election results can be predicted by the factors of total volume of messages, positive messages and negative messages tweeted about a candidate. Social matrix analysis revealed that the quantity of twitter messages was a strong predictor of election results in the 18th presidential election in Korea. In addition, more positive messages than negative messages about a candidate from twitter users recorded better results in the election. This research found that the total quantity of messages, positive messages, and negative messages as key factors for predicting election result. Future studies should investigate other SNS platforms to discover what is the most effective communication strategy on each platform.

• Journal of KIISE:Computing Practices and Letters
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• v.15 no.1
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• pp.29-37
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• 2009

Recently, message based data transmission plays an important role in modem computing systems. Especially JMS(Java Message Service) is one of the most popular messaging platform. However, because of its characteristics for maintaining reliability, if we want to use it for transmission of large scale messages in a distributed Internet environment by using a WAN connection which may not be robust enough, we need to employ a different method to minimize total transmission time of messages. We found the fact that the total time of message transmission heavily depends on size of a message. In order to achieve the ideal size of a message, we develope a novel mechanism and a system which finds the ideal size of a message and automatical1y control JMS applications for minimizing transmission time. Finally, we test the proposed mechanism and system using real-data in order to prove advantages and compared with the naive mechanism. As a conclusion, we showed that our proposed mechanism and system provide an effective way to reduce transmission time of large scale messages in distributed environment.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 1994.11a
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• pp.67-77
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• 1994

통신로에서 메시지 수정 등을 검출하는 수단인 메시지 인증법에 관해 살펴보고, 기존의 방식과 새로 제안하는 방식을 메시지 에러율과 효율성 면에서 고찰하여, 제안된 방식이 기존의 방식보다 통신로 비트 에러율이 $10^{-2}$~$10^{-5}$일 때 효율이 크게 좋아지고 메시지 에러율이 개선됨을 보인다.

• Management & Information Systems Review
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• v.31 no.1
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• pp.247-272
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• 2012

This study scarcity of recent online message promotion limited quantity of messages and time the message is limited controlled variable message whose regulatory focus and promotional discounts depending on the presence of any differences in attitudes and purchase intention appears, was to verify empirically. The results of this study, first, if limited quantity of messages focus on prevention rather than focusing on messages promoting promotion attitudes and purchase intention was higher. Second, the scarcity message is simply, as well as adjust the focus, such as price discounts and promotional activities can be controlled by a variety of points were identified. If the message is particularly limited quantity discounts are not present, rather than the message, the message is presented when the discount promotional attitudes and purchase intention, except that the amplification has been demonstrated. If the message is limited time, however, these discounts are worth the extra promotion on attitudes and purchase intentions are least likely to affect the thing that was found.

• The Journal of the Korea Contents Association
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• v.20 no.3
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• pp.81-91
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• 2020

This study explored message framing methods for effective campaigns to prevent suicide. In particular, the study reviews the gain message and the loss message. In the effect of campaign message, gender differences and Any differences between the suicide high risk group and low risk group were explored. Subjects were a total of 98 people. A total of 10 messages were presented as loss framing and gain framing, respectively. The attitude towards these messages were then measured. Suicide low risk group showed favorable attitude toward gain framing messages that emphasized the benefits of not committing suicide. Meanwhile suicide high risk group showed a similar effect of gain framing and loss framing. Compared to men, women showed a favorable attitude toward gain framing. also high persuasive effects. In other words, this indicates that a more effective way of expressing messages to prevent suicides is to take a positive approach rather than a negative approach. Implications of the these findings are discussed and directions for future research are advanced.

• Proceedings of the Korean Information Science Society Conference
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• 2006.06d
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• pp.103-105
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• 2006

웹은 이미 인터넷 사용에 있어 가장 중요하고, 자주 이용하는 서비스로 자리 잡고 있으며, 이에 대한 여러 활용 방안에 대해서도 많은 연구가 진행되었다. 그럼에도 불구하고 웹을 이용한 메시지 전달이나 광고 등은 서비스를 제공하는 포털에 의해서 진행되고 있고, 해당 포털에 접속하지 않은 사용자에게 원하는 메시지를 전달하기가 어려운 것이 현실이다. 이미 긴급 재난 공지 등은 각 포털의 공지사항 등을 이용하여 전달하고자 하는 시스템을 구축하고 있지만 이는 결국 해당 포털에 접속해야만 메시지를 볼 수 있으며. 각 포털에 메시지를 전파하고 협조를 얻어야 하는 등의 문제가 있다. 또한 지역적, 국지적으로 발생하는 사안이나 긴급을 요하는 메시지의 경우 이러한 방식이 맞지 않고, TV, 방송 등의 직접적인 수단을 통해서만 메시지를 전달할 수밖에 없으며, 대부분의 많은 메시지가 이런 식으로만 전달하기엔 적합하지 않은 현실에 비추어 볼 때 그다지 효율적이라 볼 수 없다. 이에 7계층의 컨텐츠 스위칭 기법에서 사용되는 방식을 이용하여 네트워크의 중간에서 직접 사용자별 혹은 목적지 별 메시지를 사용자가 접속하려는 사이트나 해당 컨텐츠의 저작권과 관계없이 메시지를 전달하는 방안을 제안하고자 한다.

• The Journal of the Korea Contents Association
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• v.14 no.5
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• pp.380-389
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• 2014

The purpose of this study is to examine sidedness effects of political Ad message and moderating roles of consumers' persuasion knowledge. To test these research hypotheses, this study conducted experimental designs. 125 undergraduate students were assigned to one of the two experimental groups. The data demonstrate that message types have a significant effect on both reliability toward Ad message and acceptance intention. In addition, consumers' persuasion knowledge plays a significant moderating role between the message types and the dependent variables. The results of this study suggest various implications by indicating political Ad message as an important factor which can enhance customers' positive responses but has been passed over by the previous research. We also indicated the limitations of this study, and suggested the future research directions.

• Journal of Korea Multimedia Society
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• v.15 no.3
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• pp.372-379
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• 2012

This paper presents a group based propagation method for multi-hop transmission, in order to deliver an emergency message to the reasonable size of vehicle troop. A group head is selected in considering of the position information of vehicles and radio transmission range. With benefits of the group based transmission, it is possible to minimize the unnecessary transmissions and the possibility of message collisions. We evaluate the performance of the proposed scheme compared with conventional schemes. Simulation results show that the message propagation performance is so stable regardless of vehicle's congestion degree.