• 한국HCI학회:학술대회논문집
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• 2009.02a
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• pp.315-318
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• 2009

A payment system is required to buy various services and micropayment system is demanded for minimizing a frequent payment transaction cost in ubiquitous environment. It is not guarantee that devices are always online and payment system is required a robustness when some of them is offline. To solve this situation other systems use a centralized broker but the problem with most existing micropayment system is the heavy load on the broker. In this paper present a payment system a DHT based Peer-to-Peer micropayment system for ubiquitous environment can use even if payments need not be online and reduce broker's load.

• Journal of the Korean Society of Hazard Mitigation
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• v.10 no.5
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• pp.49-54
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• 2010

The wooden cultural assets have the characteristics such as the fast spread of flame and leading to total destruction. Therefore, there is a need for a system for early countermeasure of recognized problem, along with the technological response for accurately recognizing the situation, for the prevention and early suppression of fire. To utilize such technology for detecting the situation through the latest ubiquitous technology and for a quick response to suppress fire, the ubiquitous sensor network (USN) technology, flame detector, image sensor, USN-based cultural asset disaster prevention management application case and malfunction identification system realization were examined in this study and the study result was presented focusing on the flame detector malfunction identification system for the ubiquitous-type cultural asset disaster prevention system.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.16 no.2
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• pp.109-138
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• 2005

The concept of ubiquitous is being applied already in Korean public libraries, and ubiquitous technologies are becoming intensively in RFID system and mobile service. This research is a survey study to analyze RFID system and mobile service in Korean public libraries which sees ubiquitous age. The RFID system investigation executed manager group of 15 public libraries where the RFID system is constructed and the 259 person user groups which are the experience which uses the RFID system. It analyzed the construction and management, the percieved system benefits, the use satisfaction, and the technical and ethical problems of the RFID system. And mobile service investigation executed 20 public libraries which provide a mobile service. It analyzed the current condition of construction and the problems on management of the mobile service. At the analysis result, the study suggested the concrete plan to activate the RFID system and mobile service in Korean public libraries.

• Journal of Korean Society of Forest Science
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• v.99 no.3
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• pp.368-379
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• 2010

u-Park means national parks with environmentally sound information networks and integrated ubiquitous services are available. u-Park is totally managed based on u-IT (Ubiquitous IT Technologies) which provides ubiquitous service through sophisticated resources of national park and establishments. It is necessary in changing the existing park management system into u-IT based u-Park management system that park managers should accept new technology, u-Park management system, and be able to utilize it. The purposes of this research is to analyze managers' acceptance behavior on ubiquitous computing technology. Technology acceptance model (TAM) was introduced to specifies the causal relationships among variables related to managers' technology acceptance behavior. The hypothesized model was tested by surveying 157 managers at 5 national parks in Korea. TAM accounted for 55.2% of the variance in intention to use. The most important finding is that perceived compatibleness was the most influential variable in determining intention to use. This means that u-Park management system should be compatible with manager's task and business style.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.12 no.11
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• pp.2097-2104
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• 2008

Ubiquitous services are high duality and differentiated services which are provided for users by recognizing the context of users and environmental conditions actively. In this case, context-aware middleware is one of the most important technologies required to implement the ubiquitous services. In this paper, we propose a method for providing ubiquitous services in a specific user space effectively and monitoring human bio-signal sensors. That is, the design and implementation of intelligent home service middleware and monitoring human bio-signal sensor based on context awareness is discussed here. Context information from various sensors is gathered, and suitable services are inferred and provided to users by the middleware system. In our approach, user services can be modelled easily by using facts and rules, and the system can be extended easily to support various ubiquitous services other than intelligent home services also. The system can be integrated with external applications and legacy systems effectively by using various protocols such as RMI, socket and HTTP, XML and Zigbee etc. We have designed and evaluated various facts and rules for intelligent home services in real environments. Functionality evaluation with the system shows that ubiquitous services can be provided to users effectively in a home environment.

• Proceedings of the Korea Society of Information Technology Applications Conference
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• 2005.11a
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• pp.297-300
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• 2005

Especially, system security is very important in the ubiquitous environment. This paper proposes a protecting scheme for security policies in Firewall and intrusion detection system (IDS). The one-way hash function and the symmetric cryptosystem are used to make the protected rules for Firewalls and IDSs. The proposed scheme could be applied in diverse kind of defense systems which use rules.

• Journal of the Korean Society for Precision Engineering
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• v.26 no.1
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• pp.11-16
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• 2009

• Proceedings of the Korea Inteligent Information System Society Conference
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• 2005.11a
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• pp.177-182
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• 2005

본 논문은 유비쿼터스 컴퓨팅 환경에서 기업의 마케팅 전략의 일환으로 RFID를 이용한 구전 마케팅과 이를 용이하게 하는 비즈니스 모델을 제안한다. 이를 위해 기존의 연구를 토대로 소비생활에 있어 구전 커뮤니케이션이 미치는 영향과 구전 마케팅에 대한 기업의 의식 변화 그리고 이를 수행하는데 있어 기업이 갖는 어려움을 살펴보았다. 본 논문에서 제안하는 비즈니스 모델은 RFID를 이용하여 기업과 소비자, 소비자와 소비자간의 seamless한 networking을 가능하게 하며, 각 경제 주체의 인센티브(incentive) 체계를 이용하여 기업의 구전 마케팅을 용이하게 한다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2010.11a
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• pp.57-58
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• 2010

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2009.04a
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• pp.193-198
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• 2009

This study focuses on building an effective environmental control system for the ubiquitous housing environment. In order to build an effective environmental control system that will provide a comfortable, pleasant, and convenient environment for residents, information on how people cognize the indoor and outdoor environmental conditions, information on human beings, and information of the space should be studied. Also more studies need to be done in which method would be the best way to integrate these informations that would affect the users in the most positive way. The current environmental control system only carries the information on providing separate information of environmental factors such as light, temperature, humidity, heat, and sound. However, it is difficult to understand the energy efficiency of an architectural element through this system. Therefore, this study proposes an energy monitoring system utilizing spatial information.