• International Journal of Highway Engineering
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• v.16 no.3
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• pp.75-84
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• 2014

PURPOSES : Traffic congestions which occur in the intersections of arterials lead to mobility and environment problem, and then traffic agencies and engineers have been struggling for mitigating congestions with greenhouse gas emissions. As an alternative of solving theses problems, this study is to introduce a low-cost and high-effectiveness countermeasure as unconventional intersections which are successfully in operation in U.S.. The main feature of unconventional intersections is to reroute turning movement on an approach to other approach, which consequently more green time is available for the progression of through traffic. Due to improved progression, this unique geometric design contributes to reduce delays with greenhouse gas emission and provides a viable alternative to interchanges. This study is to evaluate the potential operation and environment benefits of unconventional intersections. METHODS : This study used the VISSIM model with Synchro and EnViVer. Synchro is to optimize signal phases and EnViVer model to estimate the amount of greenhouse gas emissions by each condition. RESULTS : The result shows that unconventional intersections lead to increase the capacity and to reduce greenhouse gas emissions, compared to existing intersections. CONCLUSIONS : Unconventional intersections have the ability to positively impact operations and environments as a low-cost and high-effectiveness countermeasure.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.340-341
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• 2011

본 논문은 수도권 전압안정도 향상을 위해 사용될 Synchro-Phasor에 대하여 그 최적 설치위치에 관하여 다루었다. 특히 WAMAC(Wide Area Monitoring And Control system)시스템 구축을 위해 국내 계통 전체 감시목적과 수도권 전압 안정도 향상이라는 두 가지 측면에서 최적 PMU 설치 위치에 대해 검토하고 그 안을 제시하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.11a
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• pp.37-40
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• 2003

본 논문은 LipSynchro 소프트웨어 개발 키트(SDK)를 이용하여 기존 2차원의 정지된 이미지를 모션생성엔진, 음성분석, 인식엔진과 함께 연동함으로서 캐릭터의 움직임을 자동으로 생성하여 사실적이고 살아있는 캐릭터 에이전트를 만들어, 이를 멀티미디어 교육용 컨텐츠저작 툴과 결합하여 보다 나은 교육용 컨텐츠를 생성할 수 있도록 하였다.

• Proceedings of the KIPE Conference
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• 1999.07a
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• pp.333-337
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• 1999

This paper presents the DQ transfomation space space vector modulation method to devel control algorithm of distribu STATCON(STATic CONdenser) for line volt regulation, dc link voltage regulation harmonics compensation. The Performance an of a PI with ramp comparision and synchro reference frame current controller is carried Based on these analysis, the control perform are desirable to compensate the harmonics a regulate dc link and line voltage of Distrib line.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.12 no.4
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• pp.87-94
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• 2013

This study estimated the changes in delays and speeds of vehicles in exclusive bus lane and road when the High Occupancy Vehicles(HOV) use the median bus lane. Synchro simulation tool was used to optimize the traffic signal time on the network and VISSIM was applied to simulate various scenarios. Here, drivers behavior parameters in VISSIM was optimized using Simultaneous Perturbation Stochastic Approximation(SPSA) algorithm in order to represent real traffic condition. Based on the simulation results, the delay in Doan daero was decreased when the volume of HOV in current condition runs on the median bus lane, whereas delay in Doan dongro was increased in all scenarios. The changes in bus speed was not sharply decreased for both study sites, even though the number of HOV increased to 10%. Thus, it could be allowed that the HOV use the median bus lane in Doan dongro and Doan daero. Future research tasks include studying about changes in delay when the HOV use the curb bus lane.

• Journal of Dental Rehabilitation and Applied Science
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• v.22 no.1
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• pp.37-53
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• 2006

Purpose: The purpose of this study was to investigate the influences of the jaw dimension on the bone stress. Materials and Methods: Root analogue implant of Frialit-2 Synchro model in the jaw bone of various thickness from 8mm to 13mm were modelled axisymmetrically for a series of finite element analyses. As load conditions, non-axisymmetric lateral load of 20N and an oblique load of 50N, as well as an axisymmetric vertical load of 50N were taken into consideration. Results: The cervical area of implant under the axisymmetric load and the base cortical bone under the non axisymmetric load condition were the areas of main concern where the higher level of stress were likely to be obtained. Conclusion: The results indicated that at the two concerned areas drastically different stress distribution could take place as a function of the load conditions. Under the vertical load, the lower level of stress was observed for the narrow jaw bone at the cervical cortical bone whereas stress at the base cortical bone remained virtually unchanged. Under the non axisymmetric load condition, however, the stress at the base cortical bone increased very rapidly as the jaw bone width increased without inducing any significant change in the stress level at the cervical area.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.302-303
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• 2011

Smart WAMAC (Wide Area Monitoring And Control) System, which supplements control function with the function of WAMS(Wide Area Monitoring System), is an intelligent system not only monitoring the wide area but controlling the power equipment according to defined procedure. This paper presents WAMAC system architecture for hierarchical Infra and considerations to design and implement.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.175_176
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• 2009

K-WAMS based on i-PIU as a synchro-phasor data acquisition device using GPS can treat a monitoring and evaluation of wide area power system to detect a various symptoms of wide area disturbances and prevent large blackout. This paper introduced the development of K-WAMS such as WAMS(Wide Area Monitoring System).

• Journal of Electrical Engineering and Technology
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• v.4 no.4
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• pp.451-456
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• 2009

Through the development of phasor measurement units (PMU), various aspects of power system dynamic behavior could be monitored and diagnosed. Monitoring dynamic voltage stability has become one of the achievements we can obtain from PMUs. It is very important to select the most appropriate method for the Korea Electric Power Corporation (KEPCO) system since there are many voltage stability indices. In this paper, we propose an advanced WAVI (Wide Area Voltage Stability) that is well suited for the purposes of monitoring the dynamic voltage stability of KEPCO's PMU installation plan. The salient features of the proposed index are: i) it uses only PMU measurements without coupling with EMS data; ii) it is computationally unburdened and can be applied to real-time situations. The proposed index is applied to the KEPCO test system and the results show that it successfully predicts voltage instability through comparative studies.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.8 no.5
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• pp.1042-1049
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• 2004

In this paper, we design and implements editor for education multimedia content authoring based on avatar that use LipSynchro software development kit(SDK). This system automatically generate a movement of Avatar interworking with motion generation engine and phonetic tuning engine. thus, it is able to more excellent educational contents that combine educational multimedia contents authoring tool.