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정종민,정종민,전은경,김유경,배소영 한국언어청각임상학회 2023 Communication Sciences and Disorders Vol.28 No.2
Objectives: The purposes of this study were (1) to determine the reliability of the Korean version of the Scale of Parental Involvement and Self-efficacy-Revised (SPISE-R-K), (2) to examine whether rehabilitation experience and residual hearing level have an impact on parental self-efficacy and their involvement in rehabilitation processes, and (3) to describe the early intervention for young children with hearing loss (CHL) and their caregivers in Korea by analyzing the items in the SPISE-R-K. Methods: We collected 61 SPISE-R-K questionnaires from the caregivers of CHL (mean age= 20.85 months, SD= 7.85; male= 33, female= 28). All children used hearing devices (hearing aid (s) users= 36; cochlear implant (s) users= 25). The reliability of the questionnaire was assessed, and the effects of rehabilitation experience, and children’s residual hearing were examined for the sub-sections of ‘Knowledge’, ‘Confidence’ and ‘Action’. Moreover, the item scores from each section were compared. Results: Cronbach’s α analyses indicated that the SPISE-R-K was reliable in measuring the self-efficacy and involvement of caregivers of CHL. We found that the rehabilitation experience did not show a significant effect on each section’s score whereas residual hearing level had a significant effect on the ‘Knowledge’ section scores. Overall, parents showed higher self-efficacy in items related to auditory access than in items related to language development. Conclusion: The SPISE-R-K is a reliable tool for measuring the self-efficacy and involvement of Korean caregivers of young CHL. We hope that professionals utilize SPISE-R-K to identify the information that needs to be provided to caregivers of young Korean children with hearing loss, making it a valuable tool for early intervention.
실시간 온라인 네트워크 게임 환경에서의 게임 트래픽 특성 분석
정종민,이문규,이구연 강원대학교 산업기술연구소 2000 産業技術硏究 Vol.20 No.B
The study of game traffic has neglected by scientists, but as Internet gaming becomes more popular, multiplayer online games have become a significant element of Internet traffic. In this paper we analyze Internet traffic generated by sessions of multiplayer online games and study source models of multiplayer online game traffic. Our analysis shows that the empirical game traffic can be characterized by certain analytical model. We describe how our empirical traffic data set can be modeled and discuss how game server type influences interarrival distribution.
정종민,이구연 강원대학교 정보통신연구소 2004 정보통신논문지 Vol.8 No.-
A next generation wireless system will be converged with a number of current wireless systems that have unique and individual features. These days, researches about the integration of a 3G cellular networks and NUN are fully activated. But they are not considered subject of the virtual home environment (VHE) and global roaming environment (GRE) which are defined for personal mobility in 3G wireless system. In the GRE and the VHE, there needs an authentication among different networks as well as between user equipment and access network. In this paper we deal with an extended authentication procedure which accepts the VHE and GRE of 3G wireless system regarding an integration of authentication between 3G cellular network and Wireless LAN.
가입자 정보보호를 위한 Virtual Home Environment 시나리오 보안 취약점 분석
정종민,이구연,이용 江原大學校 産業技術硏究所 2001 産業技術硏究 Vol.21 No.A
Currently, the VHE (suggested for global roaming user to provide personal service environment) implementation scenario is being proposed to realize 3G network requirements. However, developing VHE scenarios are focused on signal flew between node and network, and network and network. this case may result in weakness to protect subscriber's privacy in 3G network which commonly uses visited network. In this paper, we reanalyze a several VHE implementation scenarios for user profile protection, indicate a problem concerning user privacy, and finally, design a procedure to cope with vulnerability in VHE implementation scenario.
ISDN AO/DI 시스템에서 버퍼링 기능 구현으로 인한 성능 향상
정종민,이구연 강원대학교 산업기술연구소 2000 産業技術硏究 Vol.20 No.B
ISDN AO/DI provides efficient communication. It dynamically allocates channels for bandwidth, which is key component for packet data communication. In this paper, we analyze performance improvement of ISDN AO/DI system with buffering scheme and compare with AO/DI system without buffering scheme. From the simulation of AO/DI with buffering scheme, we see that the required bandwidth is less than of the AO/DI system without buffering scheme.
PKI 방식의 차세대 이동통신 망에 적용 가능한 인증서 검증 절차 설계
정종민,이구연 江原大學校 産業技術硏究所 2002 産業技術硏究 Vol.22 No.A
When the wireless PKI is applied to 3G/4G mobile network which requires mutual authentication among all entities, the wired PKI procedure is not feasible for validating visited network's certifications because of the wireless environmental limitations. Also, if we depend on WAP based PKI, we cannot support confidence about certification validation since the information offered from visited network is not authenticated. Therefore, in this paper we consider various and unique characteristics of mobile environment for certification validation at 3G/4G mobile networks based on wireless PKI and then propose two certification validation procedures.