• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.10
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• pp.2247-2256
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• 2011

In this paper, we propose a coordinator-based reader protocol that can avoid reader collisions in a passive RFID system. In a proposed protocol, unlike conventional protocols that a reader itself selects its own slot randomly to communicate with tags such as DCS, Colorwave, a coordinator reader allocates an unused slot to a reader to participate in the network and sends a current slot number. A reader allocated a slot can communicate with tags. The proposed protocol can adaptively modified to apply for multiple coordinator readers environment in a wide area. This causes reader collision problem, but can be alleviated partly by applying the frequency planning. In this way, we verifies that a RFID system using the proposed protocol is three to five times better than existing systems through the simulation.

• Journal of Korean Public Health Nursing
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• v.33 no.3
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• pp.311-325
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• 2019

Purpose: This study examined the definition of care coordination, and the activities and roles of nurse care coordinators. The study also proposed suggestions for establishing and expanding the role of nurse care coordinators in community health practice. Methods: This study derived its conclusions by conducting a literature review. Results: The definition of care coordination is a comprehensive concept that includes case management and transitional care, and can be summarized as organizer and integrator of care. According to the literature review, 12 activities and 6 roles of nurse care coordinator were identified such as a collaborator, an individualized care planer, an educator/counselor, a direct nursing care providers, a population care coordinator, and a program evaluator. Training for nurse care coordinators is currently addressed in the Primary Medical Chronic Disease Management Program. Visiting nurses working at the Eupyeong-dong visiting health and welfare service are expected to act as nurse care coordinators, and the role of nurse care coordinators will, in the future, gradually increase in various nursing facilities. Conclusion: In addition to developing competencies to act as a nurse care coordinator, there is need for approaches to health policy that develop both independent role and population focused role as care coordinators.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.2
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• pp.321-328
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• 2010

This paper presents a coordinator-based TDMA reader protocol that can avoid the reader collision in a passive RFID system. In the proposed protocol, the coordinator can not only minimize the number of empty slots by efficiently allocating slots to readers incoming in Poisson distribution, but reduce latency time through the limited frame size. The proposed protocol can be implemented in either mobile or fixed mode through the slot structure to be described in the context. The simulation results show it works as suggested and the frame size limitation as well as the statistical distribution of incoming readers has a great impact on the overall slots and the average latency time.

• Korea Journal of Hospital Management
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• v.18 no.3
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• pp.1-26
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• 2013

To improve the competitiveness of the hospital provides high quality medical services in a hospital coordinator role is emphasized. This study on customer orientation of the role ambiguity in order to identify the impact of degree of customer orientation were analyzed for demographic differences. Dependent variable, customer orientation affects role ambiguity as independent variables, and regression analysis were set. And the control variables are set to support situational factors, customer orientation on the role ambiguity and hierarchical regression analysis was performed. Obtained through empirical results are as follows: First, according to the demographic characteristics of the hospital coordinator customer orientation, the difference between gender and medical subjects are not shown. Age, education, work experience, job title, and the hospital on the pattern of customer orientation has shown a difference. Second, according to the hospital coordinator role ambiguity about its impact on customer orientation analysis can be a role implementation, job implementation, opinion communication in achieving customer orientation was negatively affected. Third, role ambiguity, and customer orientation factors for the moderating effects of organizational support for the role of customer orientation can role implementation, job implementation, opinion communication was a statistically significant. Fourth, the role ambiguity factors and customer orientation for the administrative support for the moderating effect of customer orientation and role implementation is significant, but job implementation, opinion communication were statistically significant. Fifth, the role ambiguity factors and customer support for customer orientation and customer orientation for the moderating effects of role performance and the opinion communication was not statistically significant. However, job implementation was statistically significant. The limitations of this study are as follows: First, role ambiguity, situational factors and support due to limitations of the variable factors that may affect the customer orientation of a number of factors were excluded. So many exogenous variables in the measurement process can affect. Second, the variables measured as problems of self-assessment by the variable measuring the respondent's bias may occur. Third, This study is difficult to generalize. In other words, several areas of the province conducted by the empirical results of the survey as a limit on the overall generalization can follow.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.3
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• pp.984-990
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• 2010

Zigbee sensor network technology to build a ubiquitous environment has an important role. However, Zigbee technology, sensing environmental information within the local area to deliver the information because it was designed for the purpose of simple tasks, Attack by a variety of technologies that could potentially compromise the network is very high. To solve this problems, many defense mechanisms are presented in a lot of papers. But, to attack the existing Zigbee various response measures for the implementation of the functionality of the sensor nodes very heavy and high expensive problem. To resolve this problems, with superior computing power Zigbee network coordinator to install, based coordinator to intrusion detection systems is proposed. Coordinator-based IDS(Intrusion Detection System) of the Zigbee network is detected attack, and present a new approach to resolve, possible applications in various fields, so in real life Zigbee technology is expected to contribute to graft.

• Journal of the Korean Institute of Telematics and Electronics B
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• v.33B no.6
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• pp.208-216
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• 1996

This paper presents a decentralized control scheme for interconnected systems with unmodeled nonlinearities and interactions using a neural coordinator. The interactions due to the interconnection and the unmodeled nonlinearity associated with each subsystem are represented by the deviations from linearized states of decomposed subsystems. the decentralized controller is composed of local controllers and a neural coordinator. The local controller for each subsystem is derived from linearized local system parameters y linear optimal control theory. the neural cooridnator generates a corrective control signal to cancel the effect of deviation sthrough the backpropagation learning with the rrors obtained form the difference of the local system outputs and reference model outputs. the reference model consists of the part of local system without deviations. The effectiveness of the proposed control scheme is demonstrated by simulation studies.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2001.04a
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• pp.393-397
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• 2001

This paper addresses an Intelligent Agent-based Open Architecture Cell Controller for Intelligent Manufacturing System(IMS). With an Intelligent Agent approach, the IMS will be a independent, autonomous, distributed system and achieve a adaptability to change of manufacturing environment. As the development methodology of Open Architecture Cell Controller, an object-oriented modeling technique is employed for building models associated with IMS operation, such as resource model, product model, and control model. Intelligent Agent-based Open Architecture Cell Controller consists of two kinds of dependant agents, that are the active agent and the coordinator agent. The Active agent is contributed to control components of IMS in real-time. The coordinator agent has great role in scheduling and planning of IMS. It communicates with other active agents to get information about status on system and generates the next optimal task through the making-decision logic and dispatch it to other active agent.

• Information Systems Review
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• v.1 no.2
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• pp.41-54
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• 1999

지금까지 메타-몰에서의 지불처리 보안 방안을 살펴보았다. 사실상의 표준인 SET이 1인의 상인만을 대상으로 하고 있으므로, 여러 하부 몰을 거느리고 원-스톱 지불을 지원하는 메타-몰에는 그대로 적용할 수 없었다. 따라서, 메타-몰에서는 지불대표자의 개념을 도입하여 Meta-Malls Coordinator가 SET에서의 상인 역할을 하면서 Mall Operator들에 대해 주문정보를 전달하도록 하였다. 고객, Meta-Malls Coordinator, 금융기관 간에는 SET 규정을 따름으로써, 메시지의 기밀성, 인증, 무결성, 연결성을 확보하였다. 그리고, Meta-Malls Coordinator와 Mall Operator 간의 주문정보에 대한 인증과 무결성을 위하여 주문정보에 전자서명을 하도록 하였으며, 전자서명의 Refreshness를 위하여 Challenge를 주고 받을 수 있도록 주문확인과 주문통지의 두 번의 메시지 전달단계를 정의하였다. 동시에, 주문확인 메시지는 재고확인 등의 판매 가능성 여부를 확인하는 절차를 겸하도록 하였다. 본 방법론은 SET을 메타-몰에 적용하는 방안으로서 구현 되었으나, SET이외의 지불방법론에 대해서도 동일하게 적용될 수 있다. 현재 (주)메타랜드(http://www.metaland.com)가 실제 고객들을 대상으로 이러한 지불정보 보안체계를 갖는 메타-몰 구조의 전자쇼핑몰을 운영 중에 있다.

• Journal of the Korea Computer Industry Society
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• v.10 no.5
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• pp.193-200
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• 2009

In this paper, the raid and fire preventable system using Zibee module with IEEE 802.15.4 wireless communication standard and multi-sensor was developed displaying raid and firing condition with wireless network. The raid preventable system is designed using a ultrasonhe waves sensor and infrared sensor. The fire preventable system is designed using a thermistor. The datas for raid and firing condition are communicated from enddevice to coordinator with wireless network and are displayed on PC monitor.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2003.12a
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• pp.573-577
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• 2003

본 논문에서는 하나의 네트워크로 연결되어진 가정내의 모든 가전 기기 및 PC 관련 제품들을 인터넷 접속을 통해 제어 및 데이터 전송을 가능하게 하는 흠 네트워크에서 DDoS Attack을 방지하고 보안 통신을 가능하게 하는 Secure Coordinator를 구현하였다 여러 가전기기들은 진화를 거듭하여 데이터 통신 및 원격 제어가 가능하게 되었고 대부분의 전자 장비들과 연결되어 하나의 Network를 구성하고 있다. 이러한 데이터 통신은 아직 암호화 통신이 이루어지지 않아 쉽게 외부로 유출 될 수 있을 뿐만 아니라 악의적인 사용자의 DDoS Attack 에 의해서 내부 Network는 쉽게 무력화 될 수 있다. 본 논문에서는 Secure Coordinator를 통한 DDoS Attack 방지 및 암호화 통신을 구현하였으며, 본 시스템을 통해 기존 시스템의 수정 없이 서버 및 클라이언트 앞단에 모듈처럼 삽입하는 방식으로 선계가 되어 있어 Home Networking 뿐만 아니라 서버/클라이언트어플리케이션에 많은 활용이 기대되어 진다.