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Woo-Seop Rhee,김상하,Jun-Hwa Lee,Jea-Hoon Yu 한국전자통신연구원 2004 ETRI Journal Vol.26 No.1
The architecture in a differentiated services (DiffServ) network is based on a simple model that applies a per-class service in the core node of the network. However, because the network behavior is simple, the network structure and provisioning is complicated. If a service provider wants dynamic provisioning or a better bandwidth guarantee, the differentiated services network must use a signaling protocol with QoS parameters or an admission control method. Unfortunately, these methods increase the complexity. To overcome the problems with complexity, we investigated scalable dynamic provisioning for admission control in DiffServ networks. We propose a new scalable qDPM2 mechanism based on a centralized bandwidth broker and distributed measurement-based admission control and movable boundary bandwidth management to support heterogeneous QoS requirements in DiffServ networks.
Performance Evaluation of Service-Aware Optical Transport System
Jiwook Youn,Jea-Hoon Yu,Tae-Whan Yoo 한국전자통신연구원 2010 ETRI Journal Vol.32 No.2
We propose and experimentally demonstrate a service-aware optical transport system. The proposed service-aware optical transport system makes a flow based on service type and priority of traffic. The generated flow is mapped to a corresponding sub-λ for transport over an optical network. Using sub-λ provided by the centralized control plane, we could effectively provide quality-of-service guaranteed Ethernet service and best-effort service simultaneously in a single link. The committed information rate (CIR) traffic and best-effort traffic are assigned to different sub-λs. The bandwidth of the CIR traffic is guaranteed without being affected by violation traffic because the bandwidth is managed per each sub-λ. The failure detection time and restoration time from a link failure is measured to be about 60 s and 22 ms, respectively, in the ring network. The measured restoration time is much smaller than the 50 ms industry requirement for real-time services. The fast restoration time allows the proposed service-aware optical transport system to offer high availability and reliability which is a requirement for transport networks.
게임과몰입 개선을 위한 신체활동 기반 VR 게이미피케이션 개발
허정훈(Jung-Hoon, Huh),이제욱(Jea-Woog, Lee),방큰별(Keun-Byul, Bang),박성제(Sung-Je, Park),이현우(Hyun-Woo, Lee),한정규(Joung-Kyue, Han),양준석(Joon-Seok, Yang),고경훈(Kyung-Hoon, Ko),유지미(Ji-Mi, Yu),김승철(Seung-Chul, Kim),박상국( 한국HCI학회 2020 한국HCI학회 학술대회 Vol.2020 No.2
청소년 게임과몰입에 대한 문제는 그 원인 중 하나로써 게임자체 보다는 게임과몰입 청소년의 환경, 개인적 특성 등에 중점을 두고 개선하고자 하는 다양한 방법을 시도해오고 있다. 이 가운데 운동을 통한 게임과몰입의 원인인 청소년의 심리·정신의학적 기전에 효과적임을 검증하였고, 각 기전에 대한 세분화된 운동치유 방법을 본 연구에서 정립하고자 한다. 즉, 정립된 운동 프로그램을 게임콘텐츠로 적용하여 게임과몰입 청소년들의 인지기능 개선, 기분상승, 사회성 향상, 일반 게임시간 대체 등의 효과를 불러일으키는 “게이미피게이션(Gamification)” 개념을 실천하는 것이 게임과몰입 및 게임에 대한 부정적 사회인식을 개선하는데 세부적인 목적이 있다.