• Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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• 1995.06a
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• pp.18-24
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• 1995

본 연구에서는 두가지 엔진에 사용된 엔진오일의 성상변화를 측정하였다. 따라서 금속 마모입자 분석, 동점도 측정과 TAN 및 TBN 분석을 통한 물리적 성상과 화학적 성질 분석 그리고 적외선 분광 분석과 정량 폐로그라피 분석 등을 통하여 Table 1에 나타난 기준에 의해 오일의 수명을 판정하였다. 아울러 RPD를 이용하여 마모입자의 형상 등을 분석하고 엔진에서 발생하는 마모기구를 살펴보았다. 물론 본 연구는 주위 환경이 양호한 실험실에서 엔진 동력계에 의한 실험에 의존하였으므로 실제 주행실험 결과보다는 오일의 수명이 더 길게 나타날 것으로 예측된다. 더욱이 농경지에서 주로 사용되는 경운기의 경우는 오일이 먼지나 모래, 진흙 등에 의해 오손되기 쉬우므로 실제 오일의 수명은 훨씬 더 짧을 것으로 생각되므로 실차 주행실험 결과와의 비료는 앞으로 더 연구할 분야로 생각된다.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2010.05a
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• pp.181-189
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• 2010

개방형 액체로켓엔진 시스템에 대한 동특성 예측 프로그램을 작성하였다. 이 프로그램을 통해 얻은 펌프 시동 시 시간에 따른 압력 및 유량 변화 결과를 수류실험장치를 구축하여 실험적으로 검증하였다. 수류실험장치는 실제 액체로켓엔진 추진제 공급 계통에서 구성품의 형태와 배치위치, 가스발생기와 주연소실로 분기되는 유량비를 기준으로 모사되었다. 측정 시 관로가 채워진 상태에서 펌프를 시동하였으며 펌프는 전동기로 구동된다. 동특성 예측 프로그램의 작성을 위해 구성품별 동특성 모델링을 수행하고 엔진 시스템을 기준으로 각 모델링을 순차적으로 통합하였다. 구성품의 동특성 파라미터를 측정 반영하였고 압력 밸런싱을 통해 수렴 조건이 결정된다. 수렴된 밀도와 유량을 가지고 다음 시간에서의 초기 입력 값으로 대체하여 계산을 수행하였다. 천이 작동 상태에서 엔진 시스템 내의 물리량 변화를 전산 예측과 더불어 실험적으로 측정하고 비교하였다.

• The Journal of the Korea Contents Association
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• v.9 no.9
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• pp.60-67
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• 2009

This paper describes a development of system that enables the user to simulate the rockfall and landslide from slopes using physical engine. Until now, it will not be able to accomplish the virtual experiment of three-dimensional interpretation about slope informations, stability evaluation, the rockfall and landslide simulation, etc., because of absence of three-dimensional simulation systems which relates with slopes. With like that reason, this paper developed a simulator which is identical or similar the rockfall and the landslide where the possibility which will occur or occurred from actuality is high very actual condition from virtual experiment. For a simulator development, this paper uses the physical engine which is mainly used from computer game and animation development etc., And it will be show the process where the rockfall and landslide occurs with simulator. This simulator which sees the process where the rockfall and the landslide occur from three-dimension computer graphics theory and the physical engine, is a system which is the possibility of showing actual feeling. Therefore, the result of this paper is applied in vehicle travelling guidance system and intelligence traffic systematic etc., because of creates visual service and three-dimensional application of the slope information database which is developed in existing, and will be able to forecast the upgrade of user benefit planning and a service.

• Journal of Digital Convergence
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• v.10 no.4
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• pp.347-352
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• 2012

Uncertain physical phenomena of nature are a frequently researched area in emotional engineering technology and visual expression of art. This paper suggests possibility for implementation of physical phenomena (percolation, dispersion, and flow) of nature using Unity 3D engine's particle system, which have already been analyzed in a previous study [1] on modern paintings that emphasized physical properties. This paper proposes an easy implementation method for uncertain physical phenomena of nature for artists experiencing difficulty in acquisition of knowledge on computer graphics programming, providing an idea for engineers conducting research on emotion-based technology.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.42 no.5 s.335
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• pp.23-28
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• 2005

Recently, new concept, NP(Network Processor) was emerged into communication systems to cope with the various service requirements from Internet users. NP is an unique promising technique to capable of implementing of the packet processing in wire-speed and providing the flexibility for supporting the newly network services, having satisfied with implementation using hardware and software respectively in past, This paper deals with the implementation techniques and evaluation results of the line card capable to do packet forwarding function with packet processing power of wire-speed and applicable to various physical interfaces. There are several interfaces of POS, Gigabit ethernet and EPON in E-OLT(EPON Optical Line Terminal) system of PATH(Photonic Access To Home) network. Therefore, the E-OLT's packet forwarding engine have to support various subscriber's interface in wire speed. Our system is implemented the subscriber's card in daughter board and the setup procedure is done by system firmware based on the module's identifier acquired from installed physical board.

• Journal of the Korean Applied Science and Technology
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• v.32 no.2
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• pp.194-201
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• 2015

A lubricant used in the transport sector have been developed for the purpose of improving vehicle performance. To improve the engine oil for some terrible conditions, various studies have been conducted to improve vehicle performance. There are limitations in development of lubricant for the economic point, but various additives have beed developed in the technical point. Recently, government tried to prohibit reckless use of additives in base oil because of the environmental issues. The institutionalized quality standards of the additives has been estabilished. In this study, physicochemical properties and environmental effect of vehicle engine oils in domestic sector were investigated.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2019.05a
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• pp.227-229
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• 2019

Currently, people use game engines which is consist of essential elements(Graphic engine, Physics engine, Audio engine, UI system, Gameplay frameworks, etc) to develop video. This game engine is used for its own development, but usually it is used by renting a commercial engine. To be able to use such a game engine requires a lot of theoretical and functional education, but in a limited period of university education, it is impossible to deal with various game engines in game art colleges, not general engineering universities. This paper will compare and analyze the characteristics, and merits and demerits of these two kinds of Game engines (Unity and Unreal engine), and showed the result of analyses about the fact that educating which of the above 2 Game engines are helpful and beneficial for the students for the efficient education in the Art college where should teach much in the limited time.

• Proceedings of the Korean Information Science Society Conference
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• 2003.10a
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• pp.346-348
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• 2003

레디언스 엔진(Radiance Engine)은 미국 Lawrence Berkeley Laboratory(LBL)에서 개발된 빛의 거동을 물리적으로 시뮬레이션한 결과로부터 조도 및 휘도 분포를 계산하고 가시화 하여 빛 환경의 정량적, 정성적 평가가 모두 가능한 전 세계적으로 수많은 사용자 그룹이 형성되어 있는 프로그램이다. 그러나 많은 사용자 층을 보유하고 있음에도 불구하고 텍스트 기반의 인터페이스와 UNIX 환경의 워크스테이션급 컴퓨터에서만 실행되는 한계를 가지고 있기 때문에 그래픽 기반의 인터페이스에 익숙해져 있는 사용자들이 이용하기 어렵고. 비용적으로 고성능 컴퓨터에 대한 많은 부담이 있어 대중화가 되고 있지 못하는 실정이다. 본 논문에서는 아직까지 그 우수성에도 불구하고 불편한 인터페이스와 고성능의 서버를 필요로 하는 이유로 국내에서 활발하게 사용되고 있지 못하는 레디언스 엔진을 다수의 사용자가 쉽고 빠르며 간편하게 이용 할 수 있도록 각각의 사용자자가 제출한 레디언스 엔진 수행 작업을 분산하여 처리할 수 있는 클러스터링 시스템을 설계하고 구현한다.

• Journal of Korea Game Society
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• v.15 no.6
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• pp.183-190
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• 2015

Construct2 Game Engine is development by in United Kingdom production company Scirra. Construct 2 game engine to be used globally, the most excellent technical strength and visibility in the 2D game engine has grown to high engine. The game engine created by the 'Kongbin&Domino'. 'Kongbin&Domino' game, it began commercialization in the Google store and Apple's App Store. It advances the quality evaluation of the case of the production process and the game engine. Researched that can contribute to a better production. In the future, throughout the Research, it is to be contributed to the development of the game industry is conducting research to support the game development process which can be facilitated by the game content creation.

• Journal of the Korean Society of Propulsion Engineers
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• v.4 no.3
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• pp.83-94
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• 2000

A systematic humidity correction technique that can be used for any type of engine control mode is developed to predict the variation of engine performance due to inlet humidity. Limitation of conventional method is rot identified and then, a new method is proposed to take into account the humidity effects on each engine component characteristics and to find the variation of equilibrium running point through a re-match process between the components with a given engine control variable depending on the humidity of inlet. Comparisons are made between two methods for a single spool gas turbine engine, and it was found that the conventional method leads to invalid correction when a physical variable such as rotational speed is controlled for engine operation in humid environment. It was also found that the accuracy of the conventional method depends on the engine control mode and the engine configuration whereas the proposed method can be used for any type of engine control mode and engine configuration.