• Proceedings of the IEEK Conference
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• 2001.06d
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• pp.227-230
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• 2001

In this paper, We present a 3D image data for ocular refina. This 3D display techniques are used voxel(cuboid) projection. Voxel is 3D reconstruction method of the pixel. In this paper, 3D image display system is constructed under PC environment and programed based on modular programming by using Visual C++. The hole procedures are composed of data preparation, 3D Display over transformation and scaling.

• Proceedings of the IEEK Conference
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• 2000.11d
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• pp.109-112
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• 2000

Bitstrems corrupted by channel errors are not only difficult to be decoded but also propagate error to other part of the bitstreams when highly compressed video is transmitted over channels with noise such as mobile communication channels. In this paper, error concealment algorithm performed in decoder is proposed when errors occur for transmission. Proposed algorithm searches moving area with homogeneous movement in neighbored blocks when motion vectors are damaged, then recovers motion vectors of missing blocks considering where missing blocks are belong to. Experiment result shows that proposed algorithm exhibits better performance in PSNR than existing error concealment method.

• Proceedings of the Optical Society of Korea Conference
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• 2009.02a
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• pp.535-536
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• 2009

This paper presents a new approximation for the crystalline lens of the human eye with refracting surfaces based on schematic eye during accommodation. A new model eye describes the iso- indical profiles in the form of symmetric spherical surfaces. A vary important condition which was imposed upon the parameters (thickness, radius) was the lens volume conservation during accommodation.

• Proceedings of the IEEK Conference
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• 2001.09a
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• pp.709-713
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• 2001

인터넷과 같은 네트워크의 특성은 QoS(Quality Of Service)가 보장되지 않으며, 다양한 대역폭 변화 율, 전송중의 높은 패킷 손실율, 그리고 스트리밍 시스템에서 스트리밍 서버 및 클라이언트의 부호 화/복호화에 따른 복잡도등 다양한 문제점 및 많은 스트리밍 클라이언트에게 효과적으로 데이터를 전송하기 위한 멀티캐스팅 기법이 필수적으로 요구된다. 따라서, 계속 증가하는 멀티미디어 데이터의 스트리밍 지원을 위해 이러한 네트워크 특성과 비디오 부호화 기술을 접목시켜 보다 안정적인 데이터 전송 및 화질 유지를 가능하도록 하기 위한 요구 조건 및 스트리밍을 위한 영상 부호화 기술에 대해 살펴보고자 한다.

• Proceedings of the Korea Concrete Institute Conference
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• 2001.05a
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• pp.1029-1034
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• 2001

The effects of binder content and silica sand content on the freezing and thawing resistance of lightweight polymer concrete are examined. As a result, the mass loss and pulse velocity of lightweight polymer concrete decrease with increasing binder content and silica sand content. The relative dynamic modulus and durability factor of lightweight polymer concrete reaches minimum at a silica sand content of 50% and a binder content of 28%, and is inclined to increase with increasing binder content and silica sand content.

• Proceedings of the Materials Research Society of Korea Conference
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• 1998.05a
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• pp.98-98
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• 1998

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 1998.10a
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• pp.171-175
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• 1998

This study was to estimate the strength of pine needle ash concrete using cement, natural aggregates and pine needle ash(PNA). The highest strength was achieved by 5% pine needle ash filled PNA concrete respectively. It was increased 6% by compressive strength, 15% by tensile strength and 13% by bending strength than that of the normal cement concrete, respectively.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2000.10a
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• pp.171-174
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• 2000

This paper presents an approach to determine the vehicle fleet size for container shuttle service in a stochastic working environment. The shuttle service can be defined as the repetitive travel between the designated places during working period. The initial number of vehicles is temporarily calculated using the transportation model. Simulation is carried out in order to investigate dynamic behavior of container shuttle. Finally, the equation for estimating the vehicle fleet size is obtained through the multiple regression model based on simulation results.

• Proceedings of the Korean Information Science Society Conference
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• 2002.04b
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• pp.520-522
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• 2002

본 논문에서는 3차원 게임 엔진에서 역학엔진의 개발을 지원하는 역학 시뮬레이터 및 개발도구에 대해 설계하였다. 3차원 게임 엔진을 개발하는 과정에서 역학 현상을 실시간으로 테스트하여 동적이며 인터렉티브한 게임 효과와 사용자가 역학 시뮬레이터를 통해 실시간으로 테스트한 환경을 개발도구에서 적합한 API를 생성하여 라이브러리형태로 제공함으로써 개발기간의 단축 및 개발 공정에 관련된 프로세스 처리론 효율적으로 할 수 있도록 하였다.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2002.10a
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• pp.185-188
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• 2002

This study is performed to examine the engineering properties of polyprofilene fiber reinforced high flowable concrete. For the estimation of the flow ability and filling ability, the slump flow, box height difference and L-shape filling appearence are measured and compared. The test result shows that the slump flow and L-shape filling appearence is decreased with increase containing polyprofilene fiber and box height difference is increased with increase containing polyprofilene fiber. Also, compressive strength is decreased with increase containing polyprofilene fiber.