• Journal of Institute of Control, Robotics and Systems
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• v.20 no.6
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• pp.599-605
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• 2014

This paper presents the interactive behavior modeling method based on POMDP (Partially Observable Markov Decision Process) for HRI (Human-Robot Interaction). HRI seems similar to conversational interaction in point of interaction between human and a robot. The POMDP has been popularly used in conversational interaction system. The POMDP can efficiently handle uncertainty of observable variables in conversational interaction system. In this paper, the input variables of the proposed conversational HRI system in POMDP are the input information of sensors and the log of used service. The output variables of system are the name of robot behaviors. The robot behavior presents the motion occurred from LED, LCD, Motor, sound. The suggested conversational POMDP-based HRI system was applied to an emotional robot KIBOT. In the result of human-KIBOT interaction, this system shows the flexible robot behavior in real world.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.10a
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• pp.664-665
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• 2013

This paper present a method of constructing the multimedia processor architecture. The proposed multimedia processor architecture be able to handle each text, sound, and video in one chip. Also it have interactive function that is a characteristics of multimedia. Specially, the proposed multimedia processor be able to addressing nodes in memory map without software, and it is completely reconfigurable depend on data. Also it as able to process time and space common that have synchronous/asynchronous and it is able to protect continuous and dynamic media bus collision, and local and overall common memory structure. The proposed multimedia processor architecture apply to virtual reality and mixed reality.

• Proceedings of the Korean Society of Computer Information Conference
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• 2012.01a
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• pp.177-178
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• 2012

최근의 게임 시장에서 체감형 게임은 홈 엔터테인먼트의 중심이 되어가고 있으며 그만큼 큰 인기를 끌며 발전하고 있다. 본 논문에서는 스마트폰 모션 센서를 실제 게임에 적용하기 위한 동작 인식 방법과 적용방법을 제안한다. 본 논문에서는 모션 센서를 이용하여 테니스 게임에 사용되는 모션들을 인식하고 적용시킨다. 실험의 결과 스마트폰 모션 센서를 적용시켜 게임에 이용하는 데에 사용자가 충분한 만족도를 보였다.

• Journal of Welding and Joining
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• v.20 no.5
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• pp.113-119
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• 2002

To prevent problems caused by welding deformation, preparation in the design stage is necessary. Countermeasures in the design stage is also the most cost-effective method. In this study, to give designers information on the welding deformation, a system to visualize the welding deformation is developed. The model to visualize the deformation is the stiffened plate common in steel structures. To increase computational efficiency, theoretical solutions to calculate the deformation of plate and stiffener are used instead of numerical analysis. Also, to secure accuracy, experiments to estimate bending moment causing welding deformations are performed. A computer program written with Visual C++ is developed for interactive data input, calculation of welding deformation and display of deformed shape. Designers can change the design in the early stage after checking the deformed shape by this system.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04a
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• pp.469-471
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• 2004

기존의 전화기 자판은 여러 번의 키 누름에 의해 입력해야 하는 숨겨진 자음과 모음의 배열 때문에 문자 입력에 많은 불편이 따른다. 본 논문에서는 보다 쉬운 한글 입력을 위해서 휴대용 전화기의 키패드(Keypad)에 대한 분산형 한글 자판 배열과 그 자판 배열을 이용해서 쉽게 한글 문자를 입력할 수 있는 사용자 중심의 대화형 방법을 제시한다. 모든 단자음과 단모음이 키에 나타나 보이도록 중복 할당시키고 입력하고자 하는 글자를 구성하는 자소를 필기순서에 따라 해당키를 한번씩만 눌러서 입력할 수 있도록 했다. 또한 복자음이나 복모음의 입력을 글자의 필기 순서와 동일하게 입력하도록 하여 사용자의 문자 입력에 대한 부담이 최소화 되도록 했다. 모의실험을 통하여 기존의 방식보다 입력에 필요한 키 동작의 횟수가 줄었음을 확인했다.

• Proceedings of the IEEK Conference
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• 2006.06a
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• pp.429-430
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• 2006

In this paper, we describe the architecture of interactive data broadcasting server that can transmit the various data-service contents of the Terrestrial DMB(digital multimedia broadcasting). In the broadcasting environment of the Terrestrial DMB, we enjoys the PADS(program associated data service), or the PIDS(program independent data service) to be executed on various T-DMB terminals as well as the basic video or audio services. This server provides the function such as the data contests management, data channel management, service information configure, return channel connection. Etc. Particularly, this system provides the method to create and transfer the application signaling information for the T- DMB middle application based the java language.

• Proceedings of the Korea Concrete Institute Conference
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• 2005.05a
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• pp.419-422
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• 2005

Prestressed composite girder bridges with concrete infilled steel tube at negative flexural moment region takes the advantages provided due to the interactive reaction in the steel tube and concrete interface layer, enhancing local buckling resistance and the concrete strength provided by the lateral confining effect of concrete. Two beams were tested to examine ultimate behaviors of prestressed composite girder bridges subjected to negative flexural moment. The experimental observations of the Prestressed composite girder bridges subjected to positive flexural moment are investigated and compared to the numerical results obtained by sectional analysis method, and 1-D. and 3-D. finite element analysis methods.

• Proceedings of the KIPE Conference
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• 2005.07a
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• pp.54-56
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• 2005

The paper proposes the solar photovoltaic power generation system method for photovoltaic system to solve the power shortage due the sudden power demand. So that supplied electric power to system at appearance during surplus electric power minute and unit moment link driving with common use system is available, digital PLL circuit system voltage through composition and phase of solar photovoltatic power generation system to do synchronization do. Feed forward controller was applied to get fast current response Solar cell that is changed by solar radiation always kept the maximum output when it used Step up chopper. The dynamic character had checked through simulation used Matlab Sumulink and confirmed through an experiment.

• Proceedings of the KIPE Conference
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• 2005.07a
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• pp.57-60
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• 2005

The existing DSP for utility interactive photovoltaic generation system control, generally uses floating point process type. Because it is easy to use for number crunching, However it is too late and too expensive. fixed point process DSP, TMS320F2812, has high control speed and is rather inexpensive. This paper presents more efficient method for MPPT control using TMS320F2812.

• Proceedings of the KIPE Conference
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• 2013.07a
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• pp.380-381
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• 2013

중요부하가 존재하는 계통연계 단상 인버터에서 LCL필터 설계시 계통으로 주입하는 전류뿐만 아니라 중요부하 전압품질도 고려되어야 한다. 또한, LCL필터의 가격과 부피측면을 고려하여 고조파 감쇠율 기준을 만족하면서 인덕턴스와 캐패시턴스는 가능한 작게 설계하는 것이 중요하다. 본 논문에서는 계통 전류의 고조파 기준을 만족하고, LCL필터 모델로부터 구해지는 전달함수를 이용하여 계통연계시와 독립운전시 모두 중요부하의 전압품질이 만족하도록 단상 인버터의 필터설계를 한다. 또한, 중요부하 전압리플, 인덕터 부피, 무효전류량, 시스템 대역폭에 가중치를 적용한 LCL필터 최적설계 방법을 제안한다.