• Convergence Security Journal
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• v.9 no.2
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• pp.7-21
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• 2009

Strategies have to be employed in information systems security in order to build and operate systems for information systems security in effective and structured manner. It is also essential for the entire organization to participate for successful implementation of the strategies and making them work. Current researches on information systems security strategy in organizations, however, have mainly been focused on deployment and operation of countermeasures based on strategic thinking and decision. In consequence, it is lack of research on overall frame for containing consideration factors required for moving and leading the whole enterprise for the holistic security purpose. Therefore, this paper proposes a framework for use in establishment of organization-wide information systems security strategies based on the concept of grand strategy from the traditional strategy research and on the four dimensional features of it.

• Korean journal of communication and information
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• v.36
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• pp.198-230
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• 2006

The aim of the this study is to observer paradoxal phenomenon in media election. The media, especially Television, was traditionally a journalistic operation representing political events on the outside of political camp. But recently, it intervenes to 'the political camp' as the most important method for election campaign. A centripetal of electronic medias making the dominant political space offer an alternative plan which get over the modern crisis of representative democracy. Even though, to the production of the political symbol and the operation of symbol which constitute substantial system of political action, the human being subject is excluded and the technical system of communication make up a govern structure. So it makes the contradictory situation. TV broadcast for election campaigning show well this paradoxal situation. The institutionalization of electoral broadcasting oriented by the State strengthens an immensification, an economical and political efficiency and a transparency of electoral campaign. But the means which controls the mind of public is also strengthened. It relates the production and circulation of the political symbol and the symbolic image restricted by dominator. In conclusion, this study argues that the media election is institutionalized by the instrumental reason(procedural rationality of politics and technological rationality of broadcasting), therefore the candidate take a fragment roles for the production of transcendental political symbol and the voters accommodate to the symbolic images which are foreseen and they judge.

• Korean Journal of Social Welfare Studies
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• v.47 no.3
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• pp.5-33
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• 2016

This study investigates the current features of social service provision system focusing on the core institutional traits of the system and community environment. Specifically, the study analyzes the differences in the contents and characteristics of social service provision, according to the community types, such as metropolitan area, medium size cities, and rural area. Also, the study explores the relationships among the three major subsystems in the social service provision system based on the types of financial provisions. Furthermore, the interaction effects between the community factors and financial traits on the relationships among sub- components in the service provision system are investigated. In this study other organizations, service users and public sector are regarded as three major sub-components in the provision system. The study utilizes the raw data from '2015 Social Service Demand and Provision Survey', which interviewed 4,100 social service organizations. Results from analyses show that the gap among metropolitan area, medium cites, and rural area is not so much bigger in the diverse provision features(e.g. the competition level, the major focus on the users, and policy demands on public sector) of provider-provision-organizations than in those of both of user-provision-organization and of market-way-organizations. User-provision organizations show the distinct differences in terms of the focus points on the users, while marketed organizations do in terms of the policy demands to the public sector. In rural area, user-provision organizations act like provider-provision-organizations whereas they do market-way-organizations in the urban area. Research findings show that the social service provision types utilizing market mechanism(such as user-provision, and market-way) are not so well fit into the characteristics of rural area.

• Journal of Digital Convergence
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• v.9 no.1
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• pp.201-212
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• 2011

This study is to carry out meta-analysis on doctoral dissertations which had been written after 2004 when the empirical analysis about digital politics had begun. This study aims to identify tendency of recent analysis. For this purpose, it classifies the research trends of digital politics as political participation, political process, political advertising and election campaigns, and examines the researcher's definition, framework of empirical analysis, and all the results. Moreover, the study systematically summarizes the research model, analysis unit, concept and its components in order to ensure availablity so that the information could be available for the further research.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.49 no.7
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• pp.6-11
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• 2012

A mobile station(MS) in an 802.16e network manages its limited energy using the sleep mode operation. An MS can power down its physical operation components during the unavailability interval of the sleep mode. To reduce energy consumption by increasing the unavailability interval, this paper proposes an enhanced power saving mechanism(ePSM) when both activated Type I and Type II power saving classes(PSCs) exist in an MS. A performance evaluation confirms that ePSM results in the improved performance in terms of the unavailability interval as well as the energy consumption than conventional schemes.

• Journal of Elementary Mathematics Education in Korea
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• v.20 no.4
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• pp.563-581
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• 2016

Studies on meta-affect in problem solving tried to build similar structures among affective elements as the structure of cognition and meta-cognition. But it's still need to be more systematic as meta-cognition. This study defines meta-affect as the connection of cognitive elements and affective elements which always include at least one affective element. We logically categorized types of meta-affect in problem solving, and then observed and analyzed the real cases for each type of meta-affect based on the logical categories. We found the operating mechanism of meta-affect in mathematical problem solving. In particular, we found the characteristics of meta function which operates in the process of problem solving. Finally, this study contributes in efficient analysis of meta-affect in problem solving and educational implications of meta-affect in teaching and learning in problem solving.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.40 no.9
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• pp.589-596
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• 2016

Recently organic flash cycle (OFC) has been proposed which is a vapor power cycle where heat addition occurs with the working fluid remaining in the liquid state. This study proposes a modified OFC with regeneration and carries out thermodynamic performance analysis of the system utilizing low-temperature heat source in the form of sensible energy. Effects of working fluid and flash temperature are systemically investigated on the system performance such as net power production and thermal efficiency. Results show that the net power production has a peak value with respect to the flash temperature but the thermal efficiency increases with the flash temperature. The regenerative system shows higher thermal efficiency compared to the original OFC and improved potential for recovery of low-temperature heat sources.

• Journal of Biomedical Engineering Research
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• v.20 no.5
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• pp.609-616
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• 1999

심폐바이패스시 발생할 수 있는 튜브 마모 및 파쇄는 롤러펌프의 반복되는 압박에 의해 롤러펌프에 장착된 튜브 내벽에 균열이 생기고 이로 인해 미세한 비생물적 조각들이 혈액중으로 떨어져 나가는 현상을 말하는데, 임상적으로 치명적인 색전증을 초래할 수 있다. 그러나 아직 롤러펌프 튜브로 사용되는 PVC 및 실리콘 튜브 중 어느 쪽이 마모 및 파쇄 관점에서 더 우수한지는 체계적으로 밝혀지지 않고 있다. 이에 본 연구는 두 종류의 튜브를각각 일정 기간 롤러펌프에 장착하여 작동시킨 뒤 튜브내외면을 육안 및 주사형 전자현미경으로 관찰하였다. 즉 PVC 및 실리콘 튜브 (내경 1/2 인치의)들을 미리 정해진 폐쇄도 조절에 의해 폐쇄 회로 심폐비이패스 롤러펌프 헤드에 장착시키고 4.500ml/min에서 각각 4차례씩 1,2,4,6 시간 작동시켰다. 파쇄에 의한 색전 관찰 실험에서는 회로 중간에 동맥여과기를 설치하고 각각 6,9시간 씩 롤러펌프를 작동시켰다. 실험 후 튜브 및 여과기들을 수거한 후 육안 및 주사형 전자현미경 분석을 시행하였다. 실험후 튜브 및 여과기들을 수거한 후 육안 및 주사형 전자현미경을 분석을 시행하였다. 튜브 외부의 육안 관찰 결과 일반적으로 실라스틱 튜브에서의 외부 마모가 PVC 튜브에 비해 현저하였다. 주사형 전자현미경 관찰에서 PVC 튜브에서의 홈은 좁으면서 경계선이 뚜렷한 특징을 보였고 3시간 이상 롤러와 접촉한 튜브들에게서는 깊은 균열이 간헐적으로 관찰되었다. 반면, 실라스틱에서의 홈은 좁으면서도 경계선이 뚜렷한 특징을 보였고 3시간 이상 롤러와 접촉한 튜브들에게서는 깊은 균열이 간헐적으로 관찰되었다.반면 실라스틱에서의 튜브들에서는 홈이 상대적으로 넓고 경계가 덜 명확했으며, 특징적으로 V 자 모양의 융기부들이 간헐적으로 관찰되었다. 실라스틱 및 PVC 튜브 모두에서 50u 전후의 Craters 가 간헐적으로 관찰되었다. 여과기의 여과망에 대한 주사형 전자현미경 분석 결과 실라스틱과 PVC 튜브 실험군 모두에서 색전입자로 의심되는조각들이 발견되었으나 두군간 정량적 비교는 어려웠다. 결론적으로 롤러펌프에 의한 튜브 마모 및 파쇄현상은 실리콘 및 PVC 튜브의 재질에 따라 그 양상에는 차이가 있으나 임상적인 측면에서는 어느 쪽도 상대적인 우수성이 입증되지 못하였다.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.25 no.1
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• pp.81-89
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• 2012

This study propose the vibration-based damage monitoring scheme for steel girder bolt-connection member by using wireless acceleration sensor node. In order to achieve the objective, the following approaches are implemented. Firstly, wireless acceleration sensor node is described on the design of hardware components and embedded operation software. Secondly, the vibration-based damage monitoring scheme of the steel girder bolt-connection member is described. The damage monitoring scheme performed global damage occurrence alarming and damage localization estimation by the acceleration response feature analysis. The global damage alarming is applied to the correlation coefficient of power spectral density. The damage localization estimation is applied to the frequency-based damage detection technique and the mode-shape-based damage detection technique. Finally, the performance of the vibration-based damage monitoring scheme is evaluated for detecting the bolt-connection member damage on a lab-scale steel girder.

• Journal of Korea Game Society
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• v.10 no.3
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• pp.47-59
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• 2010

Differing from most of current studies which recognizing game item cash-trade as simple static system, this study approaches game item cash-trade as Complex Adaptive System through historical analysis. The item-trade is a complex phenomenon converging between cyber-economy and real-economy, and production and consumption process of game-item are evolving dynamically over time. The results are following: first, the early item-trade emerges in endogenously rather than results from purposed system designed by singular actor. Second, after the early item-trade, the trade system as a CAS which various voluntary actors(single user, factory, game company, user community, agency, etc.) participates in is self-organizing for trading safety and efficiency. Third, the complex adaptive item-trade system satisfies actor's needs interdependently and accelerate positive feedback powerfully. This study implies that purposeful control disregarding emergent adaptive item-trade system distorts system efficiency and can lead to unintended policy failure.