• KSII Transactions on Internet and Information Systems (TIIS)
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• 제9권10호
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• pp.4177-4190
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• 2015

Current research on Internet of Things (IoT) has primarily addressed the means to enhancing smart resource allocation, automatic network operation, and secure service provisioning. In particular, providing satisfactory security service in IoT systems is indispensable to its mission critical applications. However, limited resources prevent full security coverage at all times. Therefore, these limited resources must be deployed intelligently by considering differences in priorities of targets that require security coverage. In this study, we have developed a new application of Cognitive Radio (CR) technology for IoT systems and provide an appropriate security solution that will enable IoT to be more affordable and applicable than it is currently. To resolve the security-related resource allocation problem, game theory is a suitable and effective tool. Based on the Blotto game model, we propose a new strategic power allocation scheme to ensure secure CR communications. A simulation shows that our proposed scheme can effectively respond to current system conditions and perform more effectively than other existing schemes in dynamically changeable IoT environments.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제7권5호
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• pp.1058-1076
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• 2013

The WBAN(Wireless Body Area Network) supplies mobile convenience to our medical services. But if we have few effective control variables across this service deployment, the hidden distortions or defects of the system might threaten the lives and rights of the stakeholders. Therefore we need to increase the service credibility, to get WBAN effective. This study proposes a governance mechanism using feasible variables that are currently in use in practices in WBAN environments against medical incidents. Control variables were tested in Seoul National University hospital and related medical industries of South Korea. We assume that WBAN systems would be open based on integrating patients, medical employees and law enforcements to get smart theater operations against medical incidents by implementing proposed MJA(Multilateral Joint Analysis) model. MJA model also contributes to the convergence of computer systems and medical services by demonstrating flexible SOA(Service Oriented Architecture) dashboard of healthcare services with credibility factors in medicine. The important components in MJA model across WBAN, were found to be "Safety, Accuracy and Reliability" in priority order. Factor analysis, correlations and ANOVA were used to evaluate this model and an IT dashboard with a realization of mobile application, was used to support participants' decision-making.

• 한국항공우주학회지
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• 제50권4호
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• pp.277-285
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• 2022

뉴스페이스 시대를 대표하는 소형위성 분야에서 발사기회에 대한 수요가 크게 증가하고 있다. 이를 위한 소형위성 전용 발사서비스를 합리적인 가격에 제공하는 것은 많은 스타트업 기업들이 추구하는 새로운 비즈니스 모델이 되고 있으며, 여기에는 저비용 부품과 대량생산, 최적화된 제작 공정이 결합된 비용 절감을 위한 혁신적인 솔루션들이 요구되고 있다. 이러한 흐름 속에서 우리나라에서도 한국항공우연구원에서 제3차 우주개발 진흥 기본계획에 따라 누리호를 통해 개발된 액체로켓엔진 기술을 기반으로 2단형 소형발사체 개발에 대비하여 핵심기술 및 비용절감 기술들을 개발하기 위한 선행기술 연구에 착수하였다. 본 논문에서는 소형위성을 위한 혁신적이며 가격 경쟁력을 가지는 것을 목표로 하는 2단형 소형발사체의 개념을 소개하고, 스테이징 설계 및 2단형 발사체의 전기체 구성안을 포함한 임무설계 결과를 기술하였다.

• 전자통신동향분석
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• 제32권5호
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• pp.74-84
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• 2017

In wireless access networks, it is extremely important to provide high quality of real time and interactive services, including voice and video traffic. Furthermore, low latency communication is shifting toward new paradigm which enhances user's high quality of experience, meeting the requirements for specific applications such as tactile internet, remote-control robot and machines, and mission critical application. In this paper, we introduce the approaches to achieve the extremely low latency service. The approaches include the core requirements and the key technologies providing low latency communication maintaining high reliability in wireless access networks.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.1662-1664
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• 2007

As the logistic environment of digital contents is rapidly changing, the protection of the digital rights for digital content has been recognized as one of critical issues. Digital Right Management(DRM) has taken much interest Internet Service Provider(ISP), authors and publishers of digital content as an interested approach to create a trusted environment for access and use of digital resources. This paper propose an interested digital rights protection scheme using license agent to address problems facing contemporary DRM approached : static digital rights management, and limited application to on-line environment. We introduce a dynamic mission control technology to realize dynamic digital rights management. And we incorporate license agent to on- and off-line monitoring and tracking. The proposed system prevent illegal access and use by using PKI security method, real time action monitoring for user, data security for itself.

• Journal of information and communication convergence engineering
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• 제20권1호
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• pp.8-15
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• 2022

The new 5G radio technology (NR) can provide ultra-reliable low latency communications. The supporting 5G network infrastructure will move away from the previous point-to-point network architecture to a service-based architecture. 5G can provide three new things, i.e., wider channels, lower latency and more bandwidth. These will allow 5G to support three main types of connected services, including enhanced mobile broadband, mission-critical communications, and the massive Internet of Things (IoT). In 2015, the 5th generation (5G) mobile communication was officially approved by the International Telecommunication Union (ITU) as IMT-2020. Since then, 3GPP, the international organization responsible for 5G standards, is actively developing specifications for 5G technologies. 3GPP Release 15 provides the first full set of 5G standards, and the evolution and expansion of 5G are now being standardized in Release 16 and 17, respectively. This paper provides an overview of 3GPP 5G technologies and key services.

• 인터넷정보학회논문지
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• 제9권5호
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• pp.35-46
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• 2008

서비스 기반 아키텍처의 서비스들 사이에서 연결 테스트를 하기 위하여 서비스 기반 아키텍처의 연결 특성을 분석하고, 분석을 통해서 서비스 기반 아키텍처 특성을 표현한 서비스 메시지 흐름도를 정의한다. 이 정의를 토대로 본 논문은 서비스 연결 테스트하기 위한 방안을 제안하고 실제 서비스 기반 아키텍처를 사용하는 회사에 이를 적용한다 최근 많은 기업들에서 기존의 시스템을 서비스 기반 아키텍처로 재구축하려는 움직임이 활발하다. 그러나 이러한 프로젝트들이 현실적으로 실제 시스템으로 사용되기 어려운 점은 그에 대한 연결테스트의 부재이기 때문이다. 또한 SOA에서의 통합과 연결에 차이에 대해 느끼지 못한다는 문제와 그에 따른 서비스의 계층 간의 연결에 대한 테스트의 필요성을 느끼지 못한다는 문제이다. 따라서 본 논문에서는 서비스 기반 아키텍처가 준수해야 하는 계층구조를 기반으로 서비스 연결 테스트 방안을 제안하고, 차별화 되는 두 가지 사례에 적용한다.

• 경영정보학연구
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• 제9권1호
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• pp.259-282
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• 2007

본 연구는 조달청의 종합성과관리시스템에 대한 사례를 제시하는 것이다. 조달청은 최초 구축한 성과관리시스템의 개선 및 보완 작업을 통해 2006년 초에 BSC 시스템을 구축하였으며, 그 결과 미션과 비전과 전략과제로부터 도출된 CSF와 KPI의 활용을 통해 부서와 개인에 대한 성과측정과 평가를 자동적으로 연계할 수 있게 되었다. 이는 공무원도 기업처럼 성과에 따른 보상을 함으로써 더욱 향상된 고객서비스를 제공하고, 평가 결과를 통하여 인사, 보수 등에 있어서 인센티브와 디스인센티브를 적절히 활용하여 경쟁과 성과보상의 조직으로 확고한 자리를 잡고자 하는 데 기여하였다. 또한BSC 구축은 부서중심의 개인평가체계의 강화, 다양한 평가체계에 대한 통합구성 및 실적주기별 목표관리에 의한 달성률 모니터링 체계의 구축을 가능하게 하였다. 이와 같은 조달청에 대한 사례 제시는 향후 다른 공공조직의 BSC 구축에 대한 방향을 제시할 것이며, 성과관리시스템 구축 방안과 성공요인에 시사점을 줄 수 있을 것으로 기대된다.

• 천문학회지
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• 제56권2호
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• pp.263-275
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• 2023

The Sun-Earth Lagrange point L4 is considered as one of the unique places where the solar activity and heliospheric environment can be observed in a continuous and comprehensive manner. The L4 mission affords a clear and wide-angle view of the Sun-Earth line for the study of the Sun-Earth and Sun-Moon connections from he perspective of remote-sensing observations. In-situ measurements of the solar radiation, solar wind, and heliospheric magnetic field are critical components necessary for monitoring and forecasting the radiation environment as it relates to the issue of safe human exploration of the Moon and Mars. A dust detector on the ram side of the spacecraft allows for an unprecedented detection of local dust and its interactions with the heliosphere. The purpose of the present paper is to emphasize the importance of L4 observations as well as to outline a strategy for the planned L4 mission with remote and in-situ payloads onboard a Korean spacecraft. It is expected that the Korean L4 mission can significantly contribute to improving the space weather forecasting capability by enhancing the understanding of heliosphere through comprehensive and coordinated observations of the heliosphere at multi-points with other existing or planned L1 and L5 missions.

• 품질경영학회지
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• 제42권3호
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• pp.425-444
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• 2014

Purpose: This study aims to overcome the problem of private education market environment which is polarized into commercialized large private education institutions and small and medium sized private education institutions in a poor business environment, and develop systematic performance measurement model applicable for small and medium sized private education institutions. Methods: To develop the BSC which measures financial and non-financial indicator in a balanced manner and introduce the BSC into private education institutions that contain conflicting goals "EDUCATION" and "PROFIT". In particular, Utilizing the methodology of AHP, the priority of strategies and execution assignments are derived. Results: BSC model was developed and introduced by cooperating with executives of the private education institution. Moreover, the study permits to achieve the strategy, enterprise-wide vision and mission by deriving strategy map and applying it to the private education institution. To measure the performance of BSC model instruction, KPI corresponding to the strategic objectives of each perspective was derived. Conclusion: BSC model generally introduces to large-sized companies and public institutions. In this study, BSC model is developed by focusing on small and medium sized private institution. Furthermore, this study is more than simple model development, it makes a connection with achievement of strategic objectives, enterprise-wide vision and mission through strategy map and strategy execution method. Through the developed BSC model and strategy execution method, utilization plan in practice and customized model for private education institutions coexisting profit and non-profit objectives were developed, and academic implications were presented.