• Proceedings of the Korea Information Processing Society Conference
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• 2005.05a
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• pp.1517-1520
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• 2005

UHF대역의 RFID 시스템을 위한 에어 인터페이스 표준으로 ISO/IEC는 ISO/IEC FDIS 18000-6 국제표준안을 발표하였다. 국내에서는 RFID 시스템을 위한 UHF 대역을 위해 $908.8MHz{\sim}914MHz$ 대역을 확정 발표하면서 UHF대역의 RFID 시스템을 위한 연구가 본격화 되고 있다. 특히, 대규모 RFID 시스템에서 태그들의 신속한 인식을 위해 효율적인 충돌방지 알고리즘의 개발이 중요한 연구과제로 등장하고 있다. 본 논문에서는 ISO/IEC 18000-6 국제표준을 기반으로 UHF 대역 RFID 시스템에서 리더와 리더, 리더와 태그 사이의 충돌방지 알고리즘을 소개하고 각 알고리즘의 장 단점을 분석한다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.1
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• pp.358-362
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• 2013

RFID reader platform with self-diagnosis function studied in this paper has an automatic state recognition function, a report function, and an automatic upgrade function. Also, since it uses frequency operation policy in multiple reader environments, it will be frequently used in the large operation environment and multi-readers environment. Therefore, the technology can meet the demands not only in the domestic RFID market, but in the global market.

• Journal of Global Scholars of Marketing Science
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• v.16 no.3
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• pp.107-123
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• 2006

This study suggest a model to find out relationships among the servant leadership as a preceding factor, the trust in higher officers as mediating factors, and leader satisfaction, additional efforts as a resulting factor. Then, empirical study testify the relationship among these factors. This study confined the subjects of empirical analysis to the employees in super-deluxe hotels located in Seoul, Gyeongju, Busan, and Daegu areas. In order to clarify the utility of this study, This study took only hotel employees as the subject of measurement because only hotel organization is able to reveal sensitively the behavioral response between the leader and the members of organization. The preceding study has systematized a basic theory on the servant leadership, and provided factor structure in regard to the servant leadership, but this study has searched the factor structure of the servant leadership with the hotel employees as the subjects of study. Also, from the side of the personnel manager of hotel business, this study can be a criterion for clarifying a leadership program. Especially, in order to cultivate their servant leadership, it is necessary to testify morality and pride as sub-behavioral characteristics of new employees. Also to change the mid-managers' leadership for the effective achievement of the object of organization, this study can be utilized for the development of servant leadership.

• Korean journal of communication and information
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• v.34
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• pp.244-274
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• 2006

To explore the social construction of the concept of leadership, image of media mogul depicted in the popular business newspaper, the Wall Street Journal, was analyzed. Then, the reconstructed image of the CEO was compared with the firm's stock price change to see their relationship, if any. This paper focused on the case of Steve Case (previous chairman of AOL Time Warner), who was the leader of the world largest media company. The period for the analysis was three years and five months from his inauguration(January 2000) to the resignation(May 2003). In general, CEO of a firm represents the firm itself. Thus, the image of the CEO is highly transcends to the image of the firm as well. Consequently, the image of CEO might have an impact on the firm's performance. Since business newspaper works as one of the most important information intermediaries in the stock market, the image of CEO constructed in the newspaper might be a critical indicator for the investors. The results revealed that media coverage of Steve Case was commensurate with the financial performance, particularly stock price change of the AOL Time Warner.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.21 no.7
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• pp.752-760
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• 2010

This paper investigates the performance of EPCglobal Generation-2(Gen-2) radio frequency identification(RFID) protocol under reader-to-reader interfering environments. We establish a modified discrete-time Markov chain(DTMC) model for the Gen-2 and accordingly obtain quantitative results of query success rate(QSR) and tag identification speed (TIS). Extensive simulations validate our theoretical analysis and demonstrate that the number of tags over 100 has little impact on the performance. TIS linearly decreases by 10 tags/sec/reader as the number of interfering readers increases. Our model for Gen-2 protocol is also useful to study the performance of other RFID protocols.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.27 no.1
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• pp.109-116
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• 2023

In this paper, we study the containment control problem for second-order multi-agent systems, which consists of multiple leaders and followers. The goal is to drive the followers toward the convex hull spanned by the leaders. Thus, the swarm behavior can be obtained by controlling the entire group by the leaders. This paper considers the leaders move at a constant speed and the followers have input saturations. Moreover, we assume that the followers can exchange information with neighbors, and only relative state information is available. Under these assumptions, we propose the Proportional-Integral based distributed control algorithm to solve the containment control problem with moving leaders. Moreover, based on Lasalle's invariance principle, the conditions for the control gains that guarantee the convergence of the followers to the convex hull spanned by the leaders are investigated, and it was shown that it can be designed only using the system parameter. Finally, the simulations are conducted to validate the theoretical result.

• Korean Business Review
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• v.19 no.2
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• pp.47-67
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• 2006

This paper examined the relationships between LMX, perceived use of power and conflict handling references. The empirical study was made by questionnaire survey. The sample was consisted in 615 office workers of 25 large corporations in Korea. Results of analysis of t-test indicated that LMX was significant difference in outcome variables such as perceived use of power and perceived conflict handing references. The limitation and future directions of the study were suggested.

• Journal of the Korea Convergence Society
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• v.9 no.10
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• pp.265-270
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• 2018

In this study, the flow analysis due to the car body configuration of air breather was carried out. As the resistance force whose flow affects car body has been studied, it is published that the electricity can be decreased. When the inner pressure of air breather is evaluated, there is the study of efficiency in order to raise the flow rate of inner body. At a total of five models, it is shown that the air resistance and pressure happen differently and the air pressure of side flow is changed. This study result was analyzed by using the analysis program of ANSYS, a study model was modelled using the CATIA V5 modelling program. It was investigated that the air flow rate was distributed uniformly as the curved surface of air breather configuration increases. It is thought as the most effective design method to design the air breather by considering the effect on the air resistance and flow. Also, through the design of the vehicle's airbrid configuration, the design of the product can incorporate a aesthetic sense into the design.

• The Journal of the Korea Contents Association
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• v.9 no.5
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• pp.257-264
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• 2009

This study gropes for the way to seek a desirable leader increase the efficiency of the mail service in the post service administration. That is to say, this study presents an appropriate leadership for the enhancement of the post service administration by investigating the relationship of the leadership to the organizational commitment and job satisfaction in the post service organization. Consequently, for the mail business organization, the selling leadership and the participating leadership show strong positive (+) interrelationship with the organizational commitment, but weak positive (+) interrelationship with job satisfaction. On the other hand, the telling leadership and the delegating leadership show weak negative (-) interrelationship with the former. Here, we can learn that the selling leadership and participating leadership are more effective on the mail business organization.

• Journal of the Korean Society for Library and Information Science
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• v.53 no.1
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• pp.83-108
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• 2019

This study investigated South Korean citizens' political communication and deliberation through Twitter during the 2014 General Election, focusing on influential opinion leaders' political information behaviors. Individual semi-structured interviews were administered with 13 opinion leaders using the multiple interview modes of email interviews, Skype interview and face to face interviews. Through the analytical lens of the theory of Information Worlds, the chosen social types and social norms of opinion leaders impacted their political information behaviors, including how they assessed, shared, exchanged, or avoided information, and, in turn, created boundaries between and around their information worlds that allowed for both conflict and synergy.