• The Journal of the Korea Contents Association
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• v.9 no.4
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• pp.181-188
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• 2009

With the question, "What would be the difference between TV drama image production techniques under the changing circumstances of domestic broadcasting faced with multi-media, multi-channel age after 1980' s press unification and establishment of two times commercial TV stations?" This study analysed image production techniques of three periods of TV drama development, 'TV drama maturity period(1981-1990)', 'TV drama transition period(1991-2000)', 'TV drama take-off period(2001-)'. For the image analysis within the genre of home drama, 3 dramas for each period were selected and analysed cameraworks, shot size, shot duration with the broadcasting station's DVD, homepage and manuscript. The result of this analysis revealed that the change of shot size was slight but the change of cameraworks was great, the usage of zoom and tilt diminished but the usage of dolly and track increased. and the average shot duration drastically diminished during the take-off period. These results show us that broadcasting production equipments developed during the periods, and broadcasting stations poured all-out efforts for the higher viewing rates and international competitiveness.

• Journal of the Korea Society of Computer and Information
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• v.17 no.10
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• pp.55-60
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• 2012

An free-fall object is received only force of gravity. Movement that only accept gravity is free-fall movement, and a free-falling object is free falling body. In other words, free falling body is only freely falling objects under the influence of gravity, regardless of the initial state of objects movement. In this paper, we assume, ignoring the resistance of the air, and the free-fall acceleration by the height does not change within the range of the short distance in the vertical direction. Under these assumptions, we can know about time and maximum height to reach the peak point from jumping vertically upward direction, time and speed of the car return to the starting position, and time and speed when the car fall to the ground. It can be measured by jumping degree and risk of accident from car or motorcycle in telematics.

• Journal of Korea Multimedia Society
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• v.9 no.8
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• pp.971-981
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• 2006

As shear-warp volume rendering is the fastest rendering method among the software based approaches, image quality is not good as that of other high-quality rendering methods. In this paper, we propose two methods to improve the image quality of shear-warp volume rendering without sacrificing computational efficiency. First, supersampling is performed in intermediate image space. We propose an efficient method to transform between volume and image coordinates at the arbitrary ratio. Second, we utilize pre-integrated rendering technique for shear-warp rendering. We propose new data structure called overlapped min-max map. Using this structure, empty space leaping can be performed so that we can maintain the rendering speed even though pre-integrated rendering is applied. Consequently, shear-warp rendering can generate high-qualify images comparable to those generated by the ray-casting without degrading speed.

• Journal of Korea Multimedia Society
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• v.14 no.3
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• pp.339-347
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• 2011

As the volume visualization has been applied to render medical datasets, there has been a requirement to produce high quality images. Even though nice images can be generated by using previous linear filter, high order filter is required for better images. However, it takes much time for high order resampling, so that, overall rendering time is increased. In this paper, we perform high quality volume visualization using the cardinal interpolation. By enabling the empty space leaping which reduces the number of resampling, we achieve the efficient visualization. In detail, we divide the volume data into small blocks and leap empty blocks by referring the upper and lower bound value for each block. We propose a new method to estimate upper and lower bound value of for each block. As the result, we noticeably accelerated high quality volume visualization.

• Journal of The Korean Association For Science Education
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• v.34 no.8
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• pp.795-806
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• 2014

The purpose of this study is to develop an intervention program for improvement of elementary science-poor students' Basic Science Process Skill (BSPS) and to validate the intervention program's effectiveness using eye-tracker. The participants of this study were 35 elementary science-poor students. This study's method was the analysis of real-time eye movements during basic science process skill problem solving. SMI's 120 Hz iView XTM RED was used to collect EMD (eye movement data). Experiment 3.4 and BeGaze 3.4 programs were used to design experiment and to analyze EMD. The results of this study are as follows. First, we developed an intervention program including BSPS instructional strategy, behavior of teachers & student according instructional strategy stage, teachinglearning plan and learning note. Second, science poor students' BSPS ability has improved statistically significantly through the application of intervention program and BSPS problem-solving time decreased statistically significantly. Third, AFT (average fixation time) of BSPS Question and keyword area decreased statistically significantly. Fourth, APD (average pupil diameter) of BSPS problem-solving process expanded statistically significantly. Fifth, AST (average saccade time) of BSPS problem-solving process increased statistically significantly. Sixth, AFET (average fixation entry time) of BSPS problem-clue area was accelerated statistically significantly, AFT of BSPS problem-clue area reduced statistically significantly.

• The Proceeding of the Korean Institute of Electromagnetic Engineering and Science
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• v.13 no.3
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• pp.63-73
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• 2002

초광대역 통신 시스템은 광대역에 걸쳐 주파수 스펙트럼이 기저 대역 잡음과 같이 존재하여 기존의 통신 시스템에 간섭을 주지 않고 고속의 통신이 가능하며, 반송파를 사용하지 않기 때문에 송.수신기의 소비 전력을 감소시키고 그의 구조를 간략화 시킬 수 있다. 본 논문은 신호의 대칭성에 의해 평균값이 0인 안티포달 초광대역 신호를 구성하고 시간 도약 부호를 이용하여 다중접속, 주파수 영역에서 에너지의 평활화 및 재밍 저항(간섭 제거)을 위 한 초광대역 통신 시스템을 제안하였다. AWGN 및 다중접속 환경에서 안티포달 초광대역 통신 시스템의 오류확률, 다중접속시 전송속도에 대해 수치해석을 통해 시스템의 성능을 분석하였다.

• Defense and Technology
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• no.11 s.297
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• pp.32-43
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• 2003

달에 착륙한 지 6시간 20분이 지난 후 암스트롱은 온 인류가 긴장하여 TV로 지켜보는 가운데 착륙선의 문을 열고 아홉 계단의 달착륙선 사다리를 천천히 그리고 조심스럽게 내려오기 시작하였다. 인간이 지구상에 그 모습을 나타낸 이후 40만km의 먼거리에 있는 달은 인간에게는 바라볼 수는 있지만 영원히 닿을 수 없는 것으로만 생각하였는데, 4일간의 비행 끝에 전인미답의 달에 도착하여 역사적인 첫 발을 내딛는 암스트롱에게는 형용할 수 없는 감회와 감격의 순간이었을 것이다. 그는 용솟음치는 흥분을 누를 수 없었는지 착륙 직후 "이것은 한 인간에게는 작은 발걸음이지만 인류에게는 커다람 도약이다"라고 부르짖었다.

• Electronics and Telecommunications Trends
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• v.9 no.4
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• pp.43-51
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• 1994

최근의 통신산업은 제2의 무선통신기술 도약기라 할 수 있다. 셀룰러 통신기술의 출현으로 가속화 되기 시작한 무선통신기술은 다양한 무선응용 서비스의 등장으로 정보통신 환경의 변화로 이어지고 있다. 향후 무선통신은 정보통신망에 의한 음성, 데이터, 메시지 서비스 등이 장소와 시간에 제한받지 않고 보다 효율적으로 이루어질 수 있도록 발전해 나아갈 전망이다. 본고에서는 셀룰러 응용 및 기술개발에 관한 현황과 미래의 무선통신 네트워크의 향후 발전 전망 등에 대하여 살펴보고자 한다.

• Proceedings of the Korea Society for Industrial Systems Conference
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• 2000.11a
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• pp.681-691
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• 2000

시간과 공간의 제약이 사라지고 지구촌이 하나의 세상으로 발전하고 있다. 정보가 힘이 되는 세상에 고객의 요구에 부흥하는 기업만이 살아 남을 수 있으며 고객의 성향 및 기호에 부흥하는 상품을 개발하고 철저한 원가 분석에 의한 과학적인 경영만이 기업의 생존을 보장하는 세상이 되었다. 이 글에서는 IMF 이후에 개방화의 물결 및 구조 조정이라는 거대한 파도를 맞은 금융권의 선진 분석시스템의 구축사례를 소개하고자 한다. 광주은행에서는 과학적 금융 기법을 습득하여 불필요한 낭비 요소를 줄이고자 하며, OFSA를 이용하여 위험관리시스템을 구축함으로써 내부 역량을 축적하고 새로운 도약의 발판을 마련하려 노력하고 있다.

• Journal of KIISE:Computer Systems and Theory
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• v.29 no.8
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• pp.463-471
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• 2002

In order to implement virtual endoscopy, high-speed rendering algorithm that generates accurate perspective projection images and efficient collision detection method are essential. In this paper we propose an efficient virtual endoscopy system based on volume rendering technique. It is possible to skip over empty (transparent) space using the distance value produced in preprocessing time, and it does not deteriorate image quality since it is an extension of ray-casting. It also accelerates rendering speed with minimal loss of image quality by adjusting sampling interval along a ray according to direction of the ray. Using the distance information, we can simplify the collision detection of volumetric objects.