• The KIPS Transactions:PartC
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• v.19C no.1
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• pp.63-70
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• 2012

To ensure privacy of individual information in remote healthcare service, health data should be protected through a secure technology such as encryption scheme. Only user who delegated decryption right can access to sensitive health data and delegator needs capability for revocating access privilege. Recently, in ubiquitous environment, CP-ABTD(Ciphertext-Policy Attribute-Based Threshold Decryption with Flexible Delegation and Revocation of User Attributes) which extends CP-ABE(Ciphertext-Policy Attribute-Based Encryption) has been proposed for these requirements. In this paper, we construct remote healthcare monitoring system with delegation and revocation capability for attribute in CP-ABTD. Finally, we analyze collusion attack between users in our system.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2002.05a
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• pp.90-95
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• 2002

This thesis is aiming at analysis and implementing Distance Video Lecturing System to guarantee the high quality in service through using less Network resource. Most of the usual Distance Video Lecturing System has been designed not in the system of Multiuser Conference but Point-to-Point. But from now on Distance Video Lecturing System is to be demanded on not only the expansion to Multiuser Distance Video Lecturing System, but high quality in service for users. To solve these problems, the Multicast Transmission Technology as the dimension of Network as well as highly efficient, advanced Compression Technology should be applied to Video Conference System in company with the expansion of Network bandwidth. The system suggested in this thesis is to help to offer an application service as Distance Video Lecturing System that will make popular on the basis of the character that the next generation Internet will be high speed Network.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.1
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• pp.520-523
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• 2005

As the Internet business has been growing rapidly, Internet users or Internet service providers have requested stable service. Along with them, the protection of data such as the management of computer information system and the prevention of barriers has become an important element. This study has embodied the remote control system that manages the scattered resources and service using JMX (Java Management Extensions) in the mobile environment and it has also suggest the method of connecting it with the remote terminal. Through the system suggested in this study, system managers are able to manage the system safely through their own regardless of time and space with the aid of mobile phone.

• Journal of the Economic Geographical Society of Korea
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• v.16 no.2
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• pp.198-217
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• 2013

This research aims to examine the behavior changes of telemedicine participants with regard to time-space reconfiguration and to address the implications of telemedicine in terms of extensibility and restrictions (ambilaterality). According to the results of this research, telemedicine can lead to behavior changes in telemedicine participants, particularly patients. However, it is difficult to anticipate the time-space reconfiguration of telemedicine participants drastically. In other words, although telemedicine minimizes patients' burden of accessibility to and utilization of medical institutions, it requires the patients to visit medical institutions at least once due to the restricted application of telemedicine related to technological problems, the characteristics of medical practice and mutual stakes among the medical institutions involved in telemedicine. And physicians (telemedicine providers as mediators between medical specialists and patients) and medical specialists (as the ultimate telemedicine providers) do not evidence considerable changes in their behaviors, except for offline meetings for information sharing and medical training. Because the present telemedicine system does not require simultaneity between physicians, patients and medical specialists. Furthermore, present telemedicine operation is absorbed into existing medical activities as a health care delivery method. These phenomena are due to 1) the interests among medical institutions and the limitation or generalization of telemedicine technologies to stimulate regional-based telemedicine operation and 2) the goal of face-to-face interactions between patients and doctors, which is to avoid misdiagnosis and side effects. Finally, medical activities related to telemedicine do not differ from general medical activities. The ambilaterality of telemedicine in terms of extensibility and the restriction of time-space reconfiguration is an unsettled problem in the ICT technologies of medical services.

• Management & Information Systems Review
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• v.31 no.1
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• pp.167-182
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• 2012

Recently, interesting of u-city with ubiquitous computing technologies has increased. In this paper, we propose u-service model for urban facility management based on ubiquitous computing technologies. To propose the research purpose, we define business model for the service and u-service model. And, we propose service function, service process, and relationships between participants to give shape to u-service model. First, we present five service functions; remote monitoring, remote control and inquire, state information, field support, and facility history information. And, we propose overall service process and demand-supply relationship between participants.

• Proceedings of the Korean Information Science Society Conference
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• 2007.06d
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• pp.435-439
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• 2007

전력부가서비스는 전력 서비스 본질의 가치를 높이기 위한 수단으로, 전력 서비스를 제공하는 과정 중에 취득된 정보를 가공 및 활용하여 제품이나 서비스의 형태로 제공하는 것을 의미하며, IT기술의 발전에 힘입어 전력산업내의 블루오션 시장으로 성장하고 있다. 국내에서는 원격검침시스템 구축 이후 원격검침데이터를 이용한 부가서비스 시스템이 개발되어 여러 형태로 수용가에게 제공되고 있으며, 요금관련 서비스는 비교적 다양하게 제공되고 있으나 그 외의 분야에서는 아직까지 깊이있는 서비스로 발전하지 못하였다. 이는 그동안의 환경적 요인이나 정책 등의 여러 가지 이유에서 기인한 것으로 보여진다. 그러나, 최근에는 시장이 변화하고 이에 따른 표준 인프라스트럭쳐 구축에 대한 논의가 이루어지면서 전력부가서비스에 대한 관심이 높아지고 이에 대한 연구도 더욱 활발해지고 있다. 본 연구에서는, 이와 같은 국내 시장의 환경 변화와 전력부가서비스의 발전 현황, 선진 시장의 부가서비스 현황을 분석하고, 실제적인 수용가의 수요 조사 결과를 바탕으로 하여, 국내의 환경 하에서 전력부가서비스 모델의 선정과 구축이 성공적으로 이루어질 수 있는 방안을 제시하고자 한다.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2003.04a
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• pp.15-20
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• 2003

한국항공우주연구원은 공공기술연구회 산하 한국지질자원연구원, 한국해양연구원, 한국건설기술연구원과 협력하여 2002년 4월 17일에 본격적인 원격탐사 연구 및 공공지원 업무의 주축을 담당하게 될 공공원격탐사센터를 설립하였다. 별도의 독립조직이 아니라 원격탐사위성인 아리랑위성을 개발, 운영하고 있는 한국항공우주연구원을 중심으로, 한국해양연구원, 한국지질자원연구원, 한국건설기술연구원등 관련기관이 해양분야, 지상분야, 건설분야 등 각 전문분야 별로 협동연구 체계를 구축, 실질적인 국가원격탐사센터 역할을 수행할 것이다. 이와 같이 설립된 공공원격탐사센터에 대한 홍보, 위성자료의 공공활용 지원 및 원격탐사 Tutorial 등을 사용자들이 쉽게 접속하여 이용할 수 있도록 공공원격탐사센터 홈페이지를 구축하여 Open 하게 되었다. 공공원격탐사센터 본부인 한국항공우주연구원을 비롯하여 전문센터별로도 홈페이지를 구축하여 서로 연결되도록 하였다. 2003년도에는 이와 같이 open 된 홈페이지에 위성자료 통합 DB를 구축하여 서비스할 예정이다.

• KIPS Transactions on Computer and Communication Systems
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• v.10 no.1
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• pp.15-28
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• 2021

As the social distance has been strengthened by the COVID-19 Pandemics, telecommuting has spread, and government agencies have also begun telecommuting since March and are still maintaining a certain level. The Government's remote work service, Government Virtual Private Network (GVPN), which is essential to telecommuting of government agencies, is expected to cause a number of problems with the rapid increase in users in a short period of time. Therefore, a survey and statistical analysis were conducted to analyze the impact of the quality factors of GVPN on the users' satisfaction to the public officials of the government departments who are directly using it, and based on these results, we intend to derive the implications necessary for the improvement of GVPN for remote work in preparation for the full-fledged spread of the non-contact era.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.48 no.6
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• pp.62-70
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• 2011

Smart-healthcare service is a health medical service which aims to provide an active consumer-directed service for both wellness and preventative health management upon the basis of rapid diffuse of smartphone which has been occurring recently. On this, this paper suggests a tele auscultation medicine smart-healthcare system based on digital stethoscope which is able through the use of the smart phone which is easy to approach anywhere. The suggested system consists of the digital stethoscope for patient's self auscultation and smart phone, the PC for doctor's examination, and the web server to connect those devices. A telemedicine can be performed between a doctor and a patient by the program which exchanges examine data and auscultation data among the devices. To sum up, by the system suggested in this paper, an easily and conveniently usable health medical service on an everyday basis could be provided without spatial and temporal limits.

• Proceedings of the Korean Information Science Society Conference
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• 2006.06d
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• pp.190-192
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• 2006

모바일 기기 시장의 폭발적인 성장과 그에 따른 서비스의 수요증가로 인해 기존 유선 환경에서 제공되던 서비스를 모바일 환경에서도 그대로 적용하고자 하는 연구가 진행되고 있다. 그러나 멀티미디어와 같이 대량의 데이터를 필요로 하는 서비스 및 대용량 데이터베이스와 같이 블록 단위의 입출력을 필요로 하는 서비스를 한정된 저장 공간과 무선 환경이라는 제한된 특성을 가진 모바일 기기에서 제공하기에는 많은 제약이 따르게 된다. 본 논문에서는 Multi-Connection[1]을 지원하는 모바일 기기의 대용량 데이터 전송에 있어 연결된 Connection이 끊기는 경우, 복구를 수행하는 동안 다른 Connection들을 통해 전송하려는 데이터들을 효율적으로 분산하여 전송하기 위한 iSCSI 기반의 원격 스토리지 시스템[2]의 로드 밸런싱 기법에 대해 기술한다.