• 디지털융복합연구
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• 제5권1호
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• pp.69-76
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• 2007

This paper presents a study on the introduction of User Model-Based Dialogue System. Also we present a plan-based Korean dialogue system as a natural language database user interface for product search. The system can be characterized by its support for mixed initiative to give user more control over dialogue, employment of user model to reflect user's preferences, alternative solution suggestion if there is no product matched exactly to user's requirements, handling circumlocution which frequently occurs in dialogues. The user modeling shell system BGP-MS is adapted for the system. The system provides for a user-friendly database user interface by managing dialogue intelligently. By its implementation and test, it has been shown that the user model-based dialogue system can be utilized effectively for product search.

• 한국게임학회 논문지
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• 제13권5호
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• pp.73-80
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• 2013

NUI(Natural User Interface)는 별도의 입출력 장치 없이 사용자 자신의 음성/신체부위 등을 사용하여 주변 디지털 기기를 제어할 수 있도록 하는 기술이다. 본 논문에서는 NUI가 적용된 스마트 공간에서 신체를 직접적으로 사용하는 체감형 게임을 실행하는 사용자를 대상으로 연구를 진행하였다. 게임 사용자의 스트레스 발생 여부를 알아내기 위하여 게임 시행 전과 후로 나누어 각각 60초에 걸쳐서 심전도를 측정하였고, 측정된 신호를 개량된 Random Forest 알고리즘으로 분석하였다. 교사학습 방식에 의한 실험을 위하여 사용자는 자신의 스트레스 발생 여부를 별도로 입력하여 저장하도록 하였으며, 실험결과 개량된 알고리즘이 기존의 알고리즘보다 1.04% 높은 정확도를 보여주었다.

• 대한인간공학회지
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• 제31권4호
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• pp.577-583
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• 2012

Objective: This paper describes the process and results related to the development of gesture recognition-based natural user interface(NUI) for vehicle maintenance e-Training system. Background: E-Training refers to education training that acquires and improves the necessary capabilities to perform tasks by using information and communication technology(simulation, 3D virtual reality, and augmented reality), device(PC, tablet, smartphone, and HMD), and environment(wired/wireless internet and cloud computing). Method: Palm movement from depth camera is used as a pointing device, where finger movement is extracted by using OpenCV library as a selection protocol. Results: The proposed NUI allows trainees to control objects, such as cars and engines, on a large screen through gesture recognition. In addition, it includes the learning environment to understand the procedure of either assemble or disassemble certain parts. Conclusion: Future works are related to the implementation of gesture recognition technology for a multiple number of trainees. Application: The results of this interface can be applied not only in e-Training system, but also in other systems, such as digital signage, tangible game, controlling 3D contents, etc.

• 인지과학
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• 제3권2호
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• pp.291-309
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• 1992

자연어에 의한 컴퓨터 조작은 시스템의 사용을 간편하고 편리하게 할 뿐 아니라 인간과 컴퓨터 사이의 정보 전달이라는 측면에서 시스템에 유연성을 제공한다.본 논문에서는 자연어 인터페이스를 지능형 지리교육 시스템(IGTS)에 적응하여 보고, 시스템 구현시 고려해야 할 여러가지 사항들을 설명한다.IGTS의 각 모듈들은 시스템과 학습자간의 자연스런 대화를 위해 인터페이스 모듈과 결합되어 있으며 상호 통신한다.

• Bulletin of the Korean Chemical Society
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• 제28권12호
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• pp.2514-2516
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• 2007

• 설비공학논문집
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• 제1권1호
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• pp.64-72
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• 1989

Laminar natural convection heat transfer from a horizontal heat exchanger tube with one infinitely long vertical plate fin has been studied by a finite-difference numerical procedure. In predicting convective heat transfer from a circular tube, the thermal boundary condition at solid fluid interface is usually assumed to be isothermal. However, in reality, the thermal boundary condition is not isothermal, and the tube has the thickness and the conductivity. So the temperature at the interface is not known a priori to the calculation. This problem has the conjugate phenomena which occur between the tube conduction and external natural convection, and between the fin conduction and external natural convection. Numerical results are obtained to determine the effects of the conductivity of solid wall and the thickness of tube wall on heat transfer. It is found that the conduction causes significant influence on the natural convection heat transfer at low K and high ${\delta}$.

• 대한기계학회논문집
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• 제16권1호
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• pp.142-155
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• 1992

본 연구에서는 실제 빙축열 시스템의 해석을 위한 기초 모델로서 수직원관 주 위의 응고과정에 대하여 밀도차와 자연대류 효과 및 최대 밀도점을 나타내는 밀도-온 도 관계식을 도입한 수치해석과 실험을 통하여 여러가지 매개변수들이 상변화에 미치 는 영향을 알아 보았다.

• 태양에너지
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• 제8권1호
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• pp.33-40
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• 1988

The characteristics of thermal instabilities of natural convection in a horizontal fluid layer bounded below by a rigid plate and above by an interface with a passive gas is presented. The critical Grashof number decreases as the surface tension gradient effect (Marangoni effect) at the interface increases and the flow remains unstable for a critical Marangoni number depending on Prandtl numbers. These results are in substantial agreement with those of Smith and Davis.

• Bulletin of the Korean Chemical Society
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• 제28권5호
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• pp.880-882
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• 2007

• International Journal of Contents
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• 제7권1호
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• pp.29-36
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• 2011

Gestures have been employed for human computer interaction to build more natural interface in new computational environments. In this paper, we describe our approach to develop a gesture interface using spatial context information. The proposed gesture interface recognizes a system action (e.g. commands) by integrating gesture information with spatial context information within a probabilistic framework. Two ontologies of spatial contexts are introduced based on the spatial information of gestures: gesture volume and gesture target. Prototype applications are developed using a smart environment scenario that a user can interact with digital information embedded to physical objects using gestures.