• Journal of Advanced Navigation Technology
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• v.24 no.5
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• pp.343-347
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• 2020

This paper presents the development of a software for tracking the location of objects in the water and for creating a three-dimensional hull map. The objective of this software, as a software for underwater hull cleaning robot, is to map the location of underwater hull cleaning robot and to locate the position of sensor by identifying the shaded area of acoustic communication. For the software designed for mapping the location of cleaning robot in the water, the height and intensity were applied as variables for underwater ultrasonic communication. The software for creating a three-dimensional hull was developed by OpenGL using scanned lines from a blueprint of a ship. This software can help identifying the location of underwater hull cleaning robot without actual visibility and can be used to maintain a stable communication status by locating the position of sensor by easily spotting the shaded area of acoustic communication caused by the curved area of the bottom of the ship.

• 제어로봇시스템학회:학술대회논문집
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• 2004.08a
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• pp.1396-1401
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• 2004

In recent years, robot has been used widely in industrial field and has been expanded as a result of continous research and development for high-speed and miniaturization. The goal of this paper is to design the special serial manipulator through the understanding of the structure, mobility, and analysis of serial manipulator. Thereafter we control the position and orientation of end-effector with respect to time. In general, a structure of industrial robot consists of several links connected in series by various types of joints. Typically revolute and prismatic joints. The movement of these joints is determined in inverse kinematic analysis. Compared to the complicated structure of parallel and hybrid robot, open loop system retains the characteristic that each link is independent and is controlled easily by AC servomotor that is used to place the robot end-effector toward the accurate point with the desired speed and power while it is operated by position control algorithm. The robot end-effector should trace the given trajectory within the appropriate time. The trajectory of 3D end-effector model made by OpenGL can be displayed on the monitor program simultaneously

• Asian-Australasian Journal of Animal Sciences
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• v.1 no.4
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• pp.201-208
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• 1988

Fifty-six lactating Surti buffaloes, fed rice straw, were allocated to seven treatment groups as follows: 1. Straw supplemented with 2% urea (SS) + 1.5kg rice bran (RB) 2. Straw treated with 4% urea in an open stack (TS open) 3. TS open + 1.5 kg RB 4. TS open + 3.0 kg RB 5. TS open + 1.5 kg RB + 3.0 kg Gliricidia (Gl) 6. Straw treated with 4% urea in a closed pit (TS closed) 7. TS closed + 1.5 kg RB + 3.0 kg Gl Milk production, butterfat percentage and liveweight gain of cows and calves were measured and tested with analysis of variance. The results are: - The animals on urea treated straw (group 2) had a higher milk production (p<0.05), higher butterfat production (p<0.05) and less liveweight gain loss (p<0.05) than the animals on urea supplemented straw (group 1). Butterfat percentage also increased by treatment, although not significantly (p>0.05). - Increasing levels of rice bran (groups 3 and 4 compared to 2) increased total milk production and milked quantity of butterfat, while butterfat percentage decreased (p < 0.05). - Milk production increased (p <0.05) with extra rice bran added (group 4 compared to 3), but was not affected (p > 0.05) by Gliricidia addition (group 5 compared to 3). Butterfat percentage dropped with extra rice bran supplement (p <0.05). The lack of response to Gliricidia indicated that protein is not limiting in treated straw, or that Gliricidia protein is partly insoluble. - System of treatment had no effect on milk production (p >0.05), while supplementation with 1.5 kg RB and 3.0 kg Gliricidia increased production and caused a lower butterfat percentage (p <0.05) (groups 2, 5, 6 and 7 compared). A significant (p <0.05) interaction treatment system x supplementation was present. It was concluded, that both treatment and supplementation did affect milk production as well as milk composition. Gliricidia addition gave less effect than rice bran, indicating different requirements for starchy substances in the feed. Treatment of straw does not negatively affect butterfat production, it can increase butterfat production and even butterfat percentage.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.1790_1791
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• 2009

OpenCV을 사용하여 MFC/OpenGL 환경의 BTT 미사일을 설계하였다. 시뮬레이션을 수행 하는 동안의 이미지에서 표적의 특징점(Feature point)를 추출해 호모그래피 행렬(Homography Matrix)을 계산하여 이로부터 표적의 위치, 속도, 자세 정보등을 추정하도록 하였다. 그리고 미사일 동역학, 자동 조종 장치 역시 C로 구현하여 통합 시뮬레이션 환경을 구축하였다.

• Proceedings of the IEEK Conference
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• 2008.06a
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• pp.1051-1052
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• 2008

As the mobile phone has multi functions and high performance, multimedia processors have an important roles in handsets. Recently high resolution camera (above 5M pixels), HD Camcording and beautiful UI which Using OpenVG or OpenGL are adopted in mobile phone. So we are introduced the function multimedia processor and guide to mobile phone engineers to meet multimedia features.

• International Journal of Internet, Broadcasting and Communication
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• v.11 no.3
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• pp.8-19
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• 2019

Since their emergence in 2007, smart phones have advanced up to the point that 5G mobile communication in 2019 started to be commercialized. Accordingly, now it is possible to share 3D modeling files and collaborate by means of a mobile web. As the recently commercialized 5G mobile communication network is so useful in sharing 3D modeling files and collaborating that even large-size geometry files can be transmitted at ultra high speed with ultra low transfer delay. We examines characteristics of major 3D file formats such as STL, OBJ, FBX, and glTF and compares the existing 4G LTE (Long Term Evolution) network with the 5G NR (New Radio) mobile communication network. The loading time and packets of each format were measured depending on the mobile web browser environments. We shows that in comparison with 4G LTE, the loading time of STL and OBJ file formats were reduced as much as 6.55 sec and 9.41 sec, respectively in the 5G NR and Chrome browsers. The glTF file format showed the most efficient performance in all of the 4G/5G mobile communication networks, Chrome, and Edge browsers. In the case of STL and OBJ, the traffic was relatively excessive in 5G NR and Edge browsers. The findings of this study are expected to be utilized to develop a 3D file format that reduces the loading time in a mobile web environment.

• Proceedings of the Korean Society of Marine Engineers Conference
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• 2005.11a
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• pp.258-259
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• 2005

• Proceedings of the KSMRM Conference
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• 2006.11a
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• pp.75-75
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• 2006

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2003.05a
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• pp.95-98
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• 2003

본 연구에서는 기존의 표면변형 디스플레이 방법의 단점을 해결하기 위한 새로운 방식의 퍼지 디스플레이 알고리즘을 제안한다. 제안한 방법에서 표면 변형을 디스플레이하기 위해서는 원래의 퍼지 모델에 단지 하나의 퍼지규칙을 추가함으로서 쉽고 간단하게 구현 할 수 있다. 제안된 퍼지 디스플레이 알고리즘은 Matlab과 OpenGL을 통한 시뮬레이션으로 물체의 표면변형을 디스플레이하기에 충분함을 검증할 수 있었다.

• Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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• 2004.05a
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• pp.101-105
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• 2004

In this paper, theoretical basis of stereoscopic display is investigated and programmed to shaw the application which could be used in the Virtual Reality (VR), especially for ship design. Stereoscopic is based on the seperated view point of left and right eyes on the screen and making 3 dimensional image. There different stereoscopic methods such are red-blue, interlacing, side-by-side and above-below are imvestigated and implemente to shaw the simple ship model and inside of ship. To shaw the 3 dimensional view, OpenGL is used to make program by implementing the logic of stereoscopic. Simple models and ship design are implemented to survey the applicability of stereoscopic for ship design. The best way is to use two projectors to emit interlaced shape. It is expected to imply this technique in the VR application for ship design.