• Journal of Korea Multimedia Society
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• v.17 no.11
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• pp.1307-1312
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• 2014

Online games are virtual space where it connects individual users through network connection to offer enjoyment of play games and game developer who service online games have to develop new contents and provide them to users to extend life of their service. Typically, in order to update new contents, all service companies have maintenance schedule to stop the game service for a while to update both server and client applications. Usually this process takes quite amount of time and users do not have any other choice but disconnected from server and wait until it is over. The purpose of this thesis is to describe the advantages of new design system which will allows users to continue to play the game even during the update. The main focus of this design is to make users feel more convenience in online gaming experience by move client from previous server to new server while users are still playing. If they can to connect current client with new server without any certificate validation process while users information from the client can automatically pass through to the new server, users may not need to experience maintenance for new contents update.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.10a
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• pp.854-857
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• 2008

Wireless sensor consists of an internal power source which has limited life time. Several MAC protocols have exploited scheduled sleep/listen cycles to conserve energy in sensor networks. Duty cycle is a user-adjustable parameter in low duty cycle MAC protocols, which determines the length of the sleep period in a frame. The sire of duty cycle has direct effect on the Performance of MAC Protocols. In this Paper, we simulated TEEM (A Traffic Aware, Energy Efficient MAC) and S-MAC in NS-2 with different duty cycle values and analyze how duty-cycle effects on the performance and energy consumption of both the protocols.

• KIPS Transactions on Computer and Communication Systems
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• v.4 no.7
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• pp.235-238
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• 2015

IEEE 802.15.4 is the well-established standard enabling wireless connectivities among wireless sensor nodes. However, the wireless sensor networks based on IEEE 802.15.4 are inherently vulnerable to hidden nodes collision because the wireless sensor nodes have very limited communication range and battery life time. In this paper, we propose the advanced method of mitigating hidden nodes collision in IEEE 802.15.4 base wireless sensor networks by clustering sensor nodes according to channel quality information. Moreover, we deal with the problem of resource allocation for each cluster.

• Journal of the Korean Society for Library and Information Science
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• v.43 no.1
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• pp.271-292
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• 2009

The public library strives to foster information use by the public, cultural activities, reading, and life-long education. Public libraries are firmly rooted in local societies providing services that reflect the needs and characteristics of those local communities, while at the same time are structured in a coherent nation-wide network. This study examines practices of managing local cultural contents and proposes ways in which public libraries, as central information hubs in local communities, can provide diverse knowledge information and cultural programs, and local culture contents.

• Proceedings of the KIEE Conference
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• 2002.07d
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• pp.2631-2633
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• 2002

The rapid increase of traffic (amount) in metropolitan (big) cities makes the quality of urban life horrible/decreasing and costs much. Much efforts have been done to develop a good public transportation information system. However, it is not goof enough, its unsystematic and inefficient system forces citizens to use their own cars instead of using public transportation. Today high speed network is available everywhere and developing applications based on the internet is very popular. To solve the traffic congestion related problems, this paper tries to build, using TCP/IP and RS-232 protocol a system which can monitor the transportation situation in the matter of real-time on the internet.

• Journal of the Korean Institute of Rural Architecture
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• v.7 no.3
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• pp.19-26
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• 2005

In this study treats 'Rural Village Development Project'. The ministry of Agriculture and Forestry and Korea Agricultural & Rural Infrastructure Corporation are enforcing this from 2004. A purpose of 'Rural Village Development Project' is as follows. Repairs a function of production farms-residing rest tourism generally after connecting a neighborhood village having the same nature in a small scale unit. Too local human resources and material resources is utilized, and develops various types with specialization. As a result, it is to improve with the quality of life of a farmer. This study finds problems to have broken out in Rural Village Development Project. Therefore, recognize whether it is on to be devoted to rural village and rural community inhabitants to solve the problem how. And analyze a policy characteristic of Rural Village Development Project and basic course. Therefore, provide with materials when decides on plan course of Rural Village Development Project through this. As a result, it is a purpose to give help to Rural Village Development Project. The results of study are follows; First, A state inhabitants, professional group, administration understand an agricultural village, and to be able to learn must be prepared first. Second, the enough time that can carry out study is necessary. Third, must present the guidebook which expresses a local characteristic well. Fourth, it is specialist database construction and network formation.

• Journal of the Korean Institute of Landscape Architecture
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• v.23 no.2
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• pp.223-241
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• 1995

Ji Cheng's great work on garden design, the 'Yuanye'(Craft of garden), written in 1631 and originally published in 1634 is the first surviving manual on landscape gardening in the Chinese tradition. This study aims at investigating not only Ji Cheng's life, achievements companionship and design activities, but also the xylographic copies, literary style, and framework of Yuanye in their historical context in order to provide the bases for further study, Ji Cheng was exellent in poetry and painting. And he constructed Dongdiyuan in Changzhou around 1623, Wuyuan in Yiaheng in 1631, and Yingyuan in Yangzhou around 1634 But no poems, paintings, and gardens designed by hi shill exist Therefore his design phi philosophy is able to be interpreted only by his work, Yuanye. After publishing, Yuanye fell into obscurity for several centuries in Chlna. It was redescovered and reprinted for the first time in 1931. Yuanye is composed of prefaces and main text The main text is divided into 'the Theory of Construction' and 'on Gardens', and the latter also into 10 sections. In this text Ji Cheng explains the aesthetic principles underlying garden design and the appropriate emotional response to various efftcts Especially, he emphasizes the importance of basin the garden design on the taxi ting nature and features of landscape and making use of natural scenery. The literary style of the book is highly mannered, and there are so many poetic descriptions and Ji Cheng's native Jiangsu dialects. So the translation of the original text is very difficult After this, the major design concepts of Ji Cheng's landscape gardening theory and whole network of these concepts have to be studied.

• Journal of Internet Computing and Services
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• v.15 no.2
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• pp.1-7
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• 2014

This paper presents an analytical method for finding the optimum transmission range in mobile ad hoc networks(MANETs). The results are particularly useful for the operation of military networks, as the transmission range affects the throughput, delay, and battery consumption. Plus, the proposed method allows the optimum transmission range to be determined in advance when deploying combatants with mobile terminals. And we analyze the battery life-time and the optimum transmission range under various propagation scenarios based on Hata propagation model. The proposed method obtains the optimum transmission range in a MANET based on the operational conditions.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.11 no.8
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• pp.4133-4145
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• 2017

Advances in science and technology are driving us to the better life but also forcing us to make more investment at the same time. Therefore, the government has provided the investment to carry on the promising futuristic technology successfully. Indeed, a lot of resources from the government have supported into the science and technology R&D projects for several decades. However, the performance of the public investments remains unclear in many ways, so thus it is required that planning and evaluation about the new investment should be on data driven decision with fact based evidence. In this regard, the government wanted to know the trend and issue of the science and technology with evidences, and has accumulated an amount of database about the science and technology such as research papers, patents, project reports, and R&D information. Nowadays, the database is supporting to various activities such as planning policy, budget allocation, and investment evaluation for the science and technology but the information quality is not reached to the expectation because of limitations of text mining to drill out the information from the unstructured data like the reports and papers. To solve the problem, this study proposes a practical text mining methodology for the science and technology trend analysis, in case of aerospace technology, and conduct text mining methods such as ontology development, topic analysis, network analysis and their visualization.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.18 no.6
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• pp.145-149
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• 2018

This paper introduces a method of sending and registering SMS using mobile LBS (Local Based Service) in social network service environment. This method acquires the location of the target person and object through the API and LBS, constructs the SMS based on the obtained information, and transmits and registers the SMS in the mobile environment. The composition of the SMS is the personal information of the object to be searched, the current position and the position of the object. Therefore, the user can quickly and accurately grasp the brief items and locations of objects to be searched through SMS. Also, Today we will improve the quality of life by providing upgraded service for shortening of appointment time and delivery.