• Journal of the Korea Institute of Information and Communication Engineering
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• v.21 no.3
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• pp.558-567
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• 2017

In this research, we developed an efficient real-time human exercise pose estimation system using multiple Kinects. The main objective of this system is to measure and recognize the user's posture (such as knee curl or lunge) more accurately by employing Kinects on the front and the sides. Especially it is designed as an extensible and modular method which enables to support various additional postures in the future. This system is configured as multiple clients and the Unity3D server. The client processes Kinect skeleton data and send to the server. The server performs the multiple-Kinect calibration process and then applies the pose estimation algorithm based on the Kinect-based posture recognition model using feature extractions and the weighted averaging of feature values for different Kinects. This paper presents the design and implementation of the human exercise pose estimation system using multiple Kinects and also describes how to build and execute an interactive Unity3D exergame.

• Journal of KIISE:Computer Systems and Theory
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• v.33 no.3
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• pp.147-156
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• 2006

Physically-based simulation modeling is to simulate the real world by using physical laws such as Newton's second law of motion, while other modelings use only geometric Properties. In this paper, we present a real time simulation of stone skipping by using the physically-based modeling. We also describe interaction of a stone on the surface of water, and focus on calculating the path of the stone and the natural phenomena of water The path is decided by velocity of the stone and drag force from the water The motion is recalculated until the stone is immersing into the water surface. Our simulation provides a natural motion of stone skippings in real time. And the motion of stone skippings are generated by give interactive displays on the PC platforms. The techniques presented can easily be extended to simulate other interactive dynamics systems.

• Journal of the Korea Computer Industry Society
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• v.7 no.4
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• pp.427-436
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• 2006

State-space method for the analysis of the dynamic characteristics of a body motion is set up as mathematical tool for the solution of differential equation by computer. Representation of a system is described as a simple form of matrix calculation and unique form of model is available for the linear or nonlinear, time variant or time invariant, mono variable or multi variable system etc. For the analysis of state-space method a complicated vector calculation is required, but this analysis can be simplified with the specific functions of a software package. Recently as the Graphical User Interface softwares are well-developed, then it is very simplified to execute the simulation of the dynamic characteristics for the state-space model with the interactive graphics treatment. The purpose of this study is to developed the simulator for the educational analysis of the dynamic characteristics of body motion, and for the analysis of the longitudinal dynamic characteristics of an aircraft that is primarily to design the simulator for the analysis of the transient response of an aircraft longitudinal stability.

• Annual Conference on Human and Language Technology
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• 1996.10a
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• pp.284-297
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• 1996

사용자가 컴퓨터와 자연스럽고 인간적으로 대화할 수 있고, 사람의 요구에 지능적인 해답을 능동적으로 제시할 수 있는 사용자 인터페이스 에이전트가 활발히 연구되고 있다. 음성, 펜, 제스쳐인식 등을 비롯한 다양한 방법을 통하여 사람의 의사전달방식을 컴퓨터의 입력수단으로 구현하여 사용자 편의성을 도모하고 있다. 본 논문에서는 컴퓨터를 블랙박스로 하고, 표면적으로 지능형 3차원 그래픽 얼굴 에이전트와 사용자가 의사소통을 하는 사용자 인터페이스를 대상으로 하였다. 컴퓨터가 단순문제 해결을 위한 도구에서 많은 정보를 다양한 매체를 통해 제공하는 보조자의 역할을 수행하게 되었기 때문에 위의 방법은 보다 적극적인 방법이라 할 수 있다. 이를 위한 기반 기술로써 국어를 발음하는 얼굴 애니메이션을 연구하였다. 발음을 표현하기 위한 데이터로써 디지털 카메라를 사용하여 입술 운동의 특징점의 위치를 조사하였고, 모델링 시스템을 개발하여 데이터를 입력하였다. 적은 데이터로도 복잡한 자유곡면을 표현할 수 있는 B-Spline곡면을 기본데이터로 사용하였기 때문에 애니메이션을 위한 데이터의 양 또한 줄일 수 있었다. 그리고 국어음소의 발음시간 수열에 대한 입술모양의 변화를 조사하여 발음소리와 입술 움직임을 동기화 시킨 발음 애니메이션을 구현하였다.

• Journal of Digital Convergence
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• v.12 no.6
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• pp.655-667
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• 2014

This paper has identified five major categories of the T2D patients' concerns based on an online forum where the patients voluntarily verbalized their naturally occurring emotional reactions and concerns related to T2D. We have emphasized the fact that the lexical and phrasal analysis brought to the forefront the prevailing negative reactions and desires for clear information, professional advice, and emotional support. This study used lexical and phrasal analysis based on text-mining tools to estimate the potential of using a large sample of patient conversation of a specific disease posted on the internet for clinical features and patients' emotions. As a result, the study showed that quantitative analysis based on text-mining is a viable method of generalizing the psychological concerns and features of T2D patients.

• Journal of KIISE:Computer Systems and Theory
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• v.28 no.9
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• pp.415-423
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• 2001

Recently, there are many attempts to reproduce real world fine art pieces in digital forms. The digital representations are convenient to store and/or transmit. In contrast, mobiles, or moving sculptures, such as those designed by Alexander Calder cannot to reproduced realistically by usual reproduction techniques. Since mobiles are originally designed to generate motions in response to external forces applied to it, people could not fully enjoy them through photographs or static images. We present a virtual mobile system where use can easily control the mobile and can feel the impressions that the artist originally intended to provide. A real-world mobile is reconstructed in a three-dimensional physically-based model. and then virtual wind is generated to give motions to it. The motions of the mobile are generated by constraint dynamics and impulse dynamics techniques, which are modified to fully utilize the characteristics of the mobile, and finally give interactive displays on the PC platforms. The techniques presented can easily be extended to simulate other interactive dynamics systems.

• Journal of the Korean Society of Food Science and Nutrition
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• v.35 no.4
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• pp.430-439
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• 2006

The purpose of this study was to investigate effects of web-based nutrition counseling on food intake and dietary behavior of type II diabetic patients. Forty type II diabetic patients, twenty -one of them were diabetic patients without complication (Ncx -DM) and nineteen of them were diabetic patients with complication (Cx-DM), participated in a web-based nutrition counseling program. At the first nutrition counseling, the patients were counselled through interview and then follow up nutrition counseling was accomplished four times during eight weeks through the web-based internet program. The web-based nutrition counseling program was consisted of diet management, nutrition counseling, nutritional assessment and follow-up management pro-gram The diet therapy knowledge score increased significantly (p<0.001) in both groups after the nutrition counseling. The dietary behavior score also increased significantly (p<0.001). For food frequency, vegetable (p<0.01), fish & shellfish (p<0.01) and seaweed (p<0.01) intake increased significantly, while potatoes, bread and carbohydrate beverage intake decreased, specially sugar products (p<0.01) and instant food (p<0.01) intake decreased significantly in both groups after the nutrition counseling, The evaluation of the web-based nutrition counseling and its program by the diabetic patients showed above average in all domains, specially the evaluation scores of younger aged patients habituated to practice computer were better than those of older aged patients. Therefore, this study shows that the web-based nutrition counseling is effective for improving dietary behavior and food intake of the patients. In addition, these results indicate that internet presents us with potential as a new medium for nutrition counseling ill informationized society.