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텔레매틱스를 위한 차량과 기지국간 양방향 통신환경 구현
지용관(yongkwan Ji),강문원(Moonwon Kang),허건수(Kunsoo Huh),조동일(Dong-il Cho),박장현(Jahng-Hyon Park) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In present telematics services, GPS receivers and navigation systems using existing telecommunication network are operated only as a simple unilateral service i.e. a self localization of the vehicle, traffic report and a neighborhood information which is only provided from a base station. For an advanced driver-friendly and active-safety system, however, much more information should be transmitted between vehicles and the central information provider. This information is possibly status of the vehicles and road, or driver's condition, which is determined by sensing and monitoring all contexts, etc. For an introductory step, this paper presents a bilateral data telecommunication module between the vehicle and the base station using RF modules and Micro-controllers. This system adopted a real time operating system for stability and reliability of data communication, and was implemented in small sized module for supporting easy installation and maintenance, and prospective expansion into the mobile base station. An experiment showed the possibility and effectiveness of the proposed implementation in practical application.
Hoseop Yun,Yongkwan Dong,Jungwook Kim,Song-i Hahn,Junghwan Do 대한화학회 2005 Bulletin of the Korean Chemical Society Vol.26 No.8
Three new quaternary tantalum thiophosphates, K0.18TaPS6, K0.28TaPS6, and Rb0.09TaPS6 have been synthesized by using reactive alkali metal halide fluxes and structurally characterized by single crystal X-ray diffraction techniques. The crystal structures of K0.18TaPS6, K0.28TaPS6, and Rb0.09TaPS6 contain 3-dimensional open framework anions, [TaPS6]x (x = 0.09, 0.18, 0.28) with the empty channel which disordered alkali metal cations, K+ and Rb+ are located in. Crystal data: K0.18TaPS6, tetragonal, space group I41/acd (no. 142), a=15.874(3) Å, c=13.146(4) Å, V=3312.7(12) Å3, K, Z=16, R1=0.0545. Crystal data: K0.28TaPS6, tetragonal, space group I41/acd (no. 142), a=15.880(2) Å, c=13.134(3) Å, V=3312.1(10) Å3, Z=16, R1=0.0562. Crystal data: Rb0.09TaPS6, tetragonal, space group I41/acd (no. 142), a=15.893(3) Å, c=13.163(4) Å, V=3324.7(15) Å3, Z=16, R1=0.0432.
해석적 중복을 이용한 Steer-by-Wire 시스템의 감지기에 대한 이상진단 기법
문승욱(SeungWuk Moon),지용관(YongKwan Ji),허건수(Kunsoo Huh),조동일(Dong-il "Dan" Cho),박장현(Jhang-Hyon Park) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.5_1
This paper proposes an analytical redundancy technique for fault diagnostics of the sensor in steer-by-wire system. We use incorporating vehicle dynamics modeling into the design of a diagnostic system for steer-by-wire system. The use of a model of vehicle dynamics improves the speed and accuracy of the diagnoses. The proposed fault diagnostics algorithm is based on parity-space methods to generate residuals. To reduce the effects of modeling uncertainty and dynamic transients, the residuals are subject to filtering. We construct diagnostic system consisting residual threshold for detection and isolator with using the directional residual vector.
지능형 교통시스템을 위한 분산형 기지국의 최적경로 탐색 알고리즘
윤장열(Jangyeol Yoon),지용관(YongKwan Ji),허건수(Kunsoo Huh),조동일(Dong-il "Dan" Cho),박장현(Jhang-Hyon Park) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.5_1
In current ITS(Intelligent Transportation System), most route guidance services use cellularphone, PDA and navigation kit. Since these systems are depend on unilateral telecommunication, they guide almost drivers with same route. And it may cause traffic jam. Therefore, telecommunication system which can telecommunicate between vehicle and base station bilaterally and algorithm which is able to divide traffic flow are necessary to realize the efficient route guidance system.<br/> This paper introduces bilateral telecommunication system and proposes indexes such as 'Driving capability' and 'Route difficulty' to improve the performance of route guidance system. We can divide traffic flow by setting up the initial route individually based on driving capability and route difficulty in this system. If there is a traffic jam in the initial route, we can modify the route in local area temporarily by route modification algorithm. Therefore, we can realize the efficient route guidance system using above methods. The simulation results presented in this paper verify the proposed method.
차량간 실시간 양방향 통신을 이용한 충돌 예측 알고리듬 개발
이영진(Youngjin Yee),지용관(YongKwan Ji),허건수(Kunsoo Huh),조동일(Dong-il),박장현(Jahng-Hyon Park) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In present telematics services, GPS receivers and navigation systems using existing telecommunication network are operated only as a simple unilateral service i.e. a self localization of the vehicle, traffic report and neighborhood information which is only provided from a base station. For an advanced driver-friendly and active-safety system, however, much more information should be transmitted between vehicle and another vehicle. This information is possibly status of the vehicles and road, or driver's condition, or surrounding information, which is determined by sensing and monitoring all contexts, etc. This system adopted event based communication system for stability and reliability of data communication, and event holding time replaced vehicle safety driving time. This system estimated safety driving time when irregularly information occurs. This system was composed by collision warning/avoidance system. Especially, safety driving time was determined by vehicle relative position and another vehicle information which are rapid turning and acceleration. This main purpose is to provide the driver adequate warning message in advance in order to avoid the possible collision. A system demonstrator is developed in order to get a test bench for collision risk assessment algorithms evaluation.
Woo, Chanjin,Kwon, Jung-Hoon,Lee, Dong-Hun,Kim, Youngsik,Lee, Kwanghee,Jo, Seong-Deok,Son, Ki dong,Oem, Jae-Ku,Wang, Seung-Jun,Kim, Yongkwan,Shin, Jeonghwa,Song, Chang-Seon,Jheong, Weonhwa,Jeong, Jips Springer Vienna 2017 Archives of virology Vol.162 No.12
<P>We report the identification of a novel reassortant clade 2.3.4.4 H5N8 virus from a dead grey heron in Korea in 2017. Outbreaks of clade 2.3.4.4 H5 HPAIVs have been reported worldwide, and they have evolved into multiple genotypes among wild birds. Phylogenetic analysis indicated that this virus likely originated from Qinghai Lake and Western Siberia and further evolved through reassortment with Eurasian LPAI during the 2016 fall migration of wild birds. Enhanced surveillance and comparative genetic analysis will help to monitor the further evolution and dissemination of clade 2.3.4.4 HPAIVs.</P><P><B>Electronic supplementary material</B></P><P>The online version of this article (doi:10.1007/s00705-017-3547-2) contains supplementary material, which is available to authorized users.</P>
Yoon Woojin,Park Hyeongyu,Bae Sanghyun,Dong Yongkwan,Yun Hoseop 대한화학회 2022 Bulletin of the Korean Chemical Society Vol.43 No.4
A series of new quaternary group 4 metal palladium sulfides, A2MPd3S6 (A = Rb, M = Hf; A = Cs, M = Zr, Hf) have been prepared from elements with the use of alkali metal halide fluxes and they are structurally characterized by single crystal x-ray diffraction methods. They are isostructural and the structure of the title compounds consists of anionic 2 ∞[MPd3S6 2] slabs and alkali metal ions. In the slab, the group 4 metals are surrounded by six S atoms in a trigonal prismatic fashion and the Pd atoms are coordinated with four S atoms in square planar fashion. Two hexagons made of six edge-sharing square planar PdS4 are interconnected by two trigonal prismatic MS6 to form the basic repeating unit, M2Pd12S28. These are linked together to form the infinite twodimensional 2 ∞[MPd3S6 2] slabs. These slabs stack on top of each other and they are separated by alkali metal cations. There is no strong S S bonding interaction in this phase and the charge valence of the title compounds could be expressed as [A+]2[M4+][Pd2+]3[S2]6 (A = Rb, M = Hf; A = Cs, M = Zr, Hf).