• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제53권1호
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• pp.8-15
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• 2004

In order to scheme the optimal assumption that satisfies the travel demand, it should be review the elements that affect on determining the headway, which are signal systems, line shape, vehicle(Light Rail Transit) performance, and so on. When applying the conventional signal systems, including Fixed Block System and Moving Block System, It was confirmed whether or not satisfy the requirements of target line with the way of a numerical formula reviewing and Train performance Simulation on the main line, station, depot, and so forth. Therefore, it should be used as references that decide target line and each sub-system after identifying the compliances for Minimum Headway to Moving Block System.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 1996년도 춘계학술대회논문집; 부산수산대학교, 10 May 1996
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• pp.291-297
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• 1996

To visualize sound field or to identify noise sources, we can use many methods such as intensity method, acoustic holographic method, source identification method using line array, etc. Conventionally all these methods are performed with the assumption of stationary condition in space and time. But for moving source, spatial characteristics and frequency components are changing, so we need another processing algorithm. This paper shows some experimental results - sound field by moving noise sources. In the experiment cross type microphone line array is used for sensing pressure and cars and a motorcycle are used as moving sources that are assumed to have constant speed. The processing methods are acoustic holographic method, spherical beamforming and spectrogram.

• 융합신호처리학회논문지
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• 제3권3호
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• pp.6-13
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• 2002

본 논문에서는 신호 교차로에서 red-time 및 green-time의 backward moving 충격파 속도를 자동 측정하는 영상처리 기반 방법을 제안한다. 충격파(shockwave)란 서로 다른 교통류 상태가 만나는 불연속적인 경계선을 의미하며, 충격파 속도는 충격파가 움직이는 속도 즉, 경계선의 기울기로 구해진다. 본 논문에서는 충격파 속도를 자동 측정하기 위해 거리-시간 다이어그램(distance-time diagram)을 작성하였다. 차량의 전역 추적을 통해서 모든 개별 차량의 이동 경로를 거리-시간 다이어그램에 나타내었고, 이동 경로 곡선의 기울기 변화 패턴을 분석하여 red-time 및 green-time의 backward moving 충격파 속도를 계산하였다. 제안된 방법을 신호 교차로에서 실험하였고 red-time 및 green-time backward moving 충격파 속도의 측정 결과를 얻었다. 충격파 속도를 측정하게 되면 차량 진행 방향의 교통 혼잡 상황을 쉽게 파악할 수 있으므로 고속 도로의 진입차선 제어, 교차로의 자동 신호제어에 효과적으로 응용할 수 있다.

• 소음진동
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• 제10권4호
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• pp.669-678
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• 2000

This paper reviews the improved moving frame acoustic holography (MFAH) method and its application. Moving frame acoustic holography was originally proposed to increase the aperture size and the spatial resolution of hologram by using a moving line array of microphones. The hologram of scanned plane can be obtained by assuming the sound field to be product of spatial and temporal information. Although conventional MFAH was only applied to sinusoidal signals, it allows us to visualize the noise generated by moving noise sources by employing a vertical line array of microphones affixed to the ground. However, the sound field generated by moving sources becomes different from that of stationary ones due to the movement of the sources. Firstly, this paper introduces the effect of moving noise sources on the obtained hologram by MFAH and the applicability of MFAH to the visualization of moving sources. Secondly, this paper also reviews improved MFAH that can visualize a coherent narrow band noise and a pass-by noise. The practical applicability of the improved MFAH was demonstrated by visualizing tire noise during a pass-by test.

• Journal of information and communication convergence engineering
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• 제7권3호
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• pp.366-371
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• 2009

A realization for an accurate position detecting system of a moving target in two dimensional plane using dual line CCDs and photometric interpolation is presented. The system is realized that the infrared LEDs are utilized for lighting source, a target size is recognized by the scanned data from CCD owing to blocking the radiated light path by placing the target between CCD and lighting source, a coordinate on the plane is found by plane trigonometry formed by the moving target and two CCD sensors, and the former scan data is used for the coordinate iteratively and the photometric interpolation is applied to sub-pixel of scanned image. The experimental results show that the experiment results in a success rate about 3 different size targets, 3, 5 and 7mmm on the test plane $210{\times}373mm$. The moving target positioning detected success rate is 93% in 3mm target, 5mm is 95.3%, and 7mm is 95.8% respectively. The photometric interpolation is enhanced to 1.5% in comparison to be unused.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2000년도 춘계학술대회논문집
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• pp.1479-1486
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• 2000

This paper introduces the improved moving frame acoustic holography (MFAH) method and its application. MFAH allows us to visualize the noise generated by moving noise sources by employing a vertical line array of microphones affixed to the ground. The sound field generated by moving sources is different from that of stationary ones due to the movement of the sources. Therefore the measured sound pressure by the microphone on the ground has to be processed so that it cooperates the effect of the movement. This paper discusses the effect of moving noise sources on the obtained hologram by MFAH. This assures the applicability of MFAH to the visualization of moving sources. This paper also reviews the improved MFAH that can visualize a coherent narrow band noise and a pass-by noise. The practical applicability of the improved MFAH was demonstrated by visualizing tire noise during a pass-by test.

• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 1999년도 추계 학술대회논문집
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• pp.85-94
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• 1999

Transient aerodynamic response of an airfoil to a moving plane-flap is numerically investigated using two-dimensional Euler equations with conservative Chimera grid method. A body moving relative to a stationary grid is treated by an overset grid bounded by a 'dynamic domain-dividing line' the concept of which is developed in this study. A conservative Chimera grid method with a dynamic domain-dividing line technique is applied and validated by solving the flowfield around circular cylinder moving supersonic speed. The unsteady and transient characteristics of the flow solver is also examined by computations of a oscillating airfoil and a ramp pitching airfoil respectively. The transient aerodynamic behavior of an airfoil with a moving plane-flap is analyzed for various flow conditions such as deflecting rate of flap and free stream Mach number.

• 만화애니메이션 연구
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• 통권31호
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• pp.153-176
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• 2013

20세기 초 미래주의 화가 중 일부는 2차원 그림에 '속도감'과 '역동성'을 표현하고자 시도하였다. 그림 속 이미지가 움직이는 것처럼 보이도록 하기 위한 속도감과 역동성의 표현은 다양한 시각적 기호로 발전하였다. 이러한 움직임을 나타내는 시각적 기호는 만화에서 중요한 운동표현의 선으로 정착하였다. 세계적으로 인기를 얻은 토리야마 아키라의 <드래곤볼>은 속도감과 역동성이 강조되어 있는 액션장르의 만화로써, 운동표현에 관한 선을 연구하기에 좋은 작품이다. <한국만화영상진흥원>의 용어사전과 <만화 애니메이션 사전>에는 운동표현에 관한 선으로 속도선, 동작선, 효과선의 세 용어가 있지만 문맥적으로 의미가 유사해서 구분해 사용하기에는 쉽지 않은 면이 있다. 본 연구에서는 <드래곤볼>의 운동표현에 관한 선을 연구하기위해 기존의 운동표현에 관한 선의 의미상 문제점을 밝히고 새로운 대안을 제시하고자 하였다. 본 연구에서 운동표현에 관한 선을 기호적인 관점에서 분류하고 쓰임에 맞추어 새롭게 정의하고자 하였으며, 기존의 속도선, 동작선, 효과선에서 잔상선을 추가하여 네 가지 선으로 분류하였다. 첫 번째, 속도선은 '움직이는 대상의 운동표현을 속도성의 개념으로 표현한 선'으로 정의하였다. 표현함에 있어서 속도선이 대상의 형태와 결합했을 때는 직접속도선, 대상의 배경과 결합했을 때는 간접속도선으로 세분하였다. 두 번째, 동작선은 '움직이는 대상의 이동형태나 이동경로를 단순화시킨 선'으로 정의하였다. 세 번째, 효과선은 '움직이는 대상의 운동표현을 감각적 표현 혹은 감정적 표현으로 강조하는 선'으로 정의하였다. 네 번째, 잔상선은 '느리게 움직이거나 흔들리는 대상의 운동표현을 잔상효과로 표현한 선'으로 정의하였다. 본 연구에서 제시한 용어는 <드래곤볼>의 운동표현에 관한 선의 이해를 도울 수 있을 것이다.

• 한국실내디자인학회논문집
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• 제20권1호
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• pp.165-172
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• 2011

Visitors' behaviors within an exhibition space are a substantial means to grant spatial arrangement and validity of exhibits. Therefore, the study analyzed visitors' behaviors in the viewpoint of attraction power and holding power of exhibits on the basis of exhibition layout of real science museums. Through the analysis, the study grasped efficiency of analysis index and exhibition environment elements which might have an effect on planning the exhibition space of a large-scale museum and producing detailed ranges of exhibition. The main indicators used are: 1. Attraction power: it indicates the relative incidence of people who have stopped in front of an object/exhibit during the exhibition tour. It is calculated by dividing the number of people who stop by the total number of people who have visited the museum or gallery. 2. Holding power: it measures the average time spent in front of an information/communication element. It is calculated by dividing the average time of stay by the time "necessary" to read an element. As a result, It was expected that attraction power and holding power of exhibit would be increased when moving line of seeing was inductive. However, when the traffic movements of seeing was inductive, repetitive seeing of exhibit was almost never realized and visitors had a strong tendency which viewed on their way of moving without viewing on their way of stopping. On the other hand, it may mean that density of exhibit is low or size of exhibition space is small that most of exhibits within exhibition space have high attraction power and holding power. As Gwacheon National Science Museum, when a museum is composed of many large-scale exhibit halls, it should be formed by separating the main moving line of seeing from the optional moving line of seeing through visitors' natural choice of exhibit and proper inducement of moving line of seeing. In such structure, exhibition environment of the main moving line has an effect on attraction of exhibit and the use of optional moving line acts as a factor to increase attraction. In addition, it is thought that attribute of exhibit and proper arrangement of rest space within exhibition space will increase holding power of exhibit.

• Journal of Advanced Marine Engineering and Technology
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• 제34권5호
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• pp.617-624
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• 2010

선박 건조공정에서 외피의 곡면 가공에 많이 사용하는 가공법을 선상가열법이라고 한다. 선상가열법은 엔지니어의 숙련도에 따라 품질의 차이가 커지기 때문에 현재에는 엔지니어의 숙련도에 의존하지 않는 자동화기기를 사용하여 선상가열을 수행하는 경우가 많다. 본 연구에서는 자동화기기를 사용한 선상가열에 의한 가열판재의 온도분포를 조사하고자 한다. 선상가열시 적용되는 주요한 변수는 가열원의 이동속도, 강도 및 가열 방식 등이 있으며, 본 연구에서는 세 가지 변수를 중심으로 가열판재의 표면 및 내부온도가 어떻게 변화하는지를 조사하였다. 해석결과 가열원의 이동속도가 빨라질수록 판재의 피크온도는 낮게 형성되는 것을 확인하였고, 또한 열원의 크기에 따른 피크온도 및 온도분포가 선형적으로 변화하는 것을 정량적으로 계산할 수 있었다.