• 트랜스-
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• 제11권
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• pp.119-142
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• 2021

영상은 이미지를 전제로 하는 문화적 실천이다. 영상이미지를 통해 관객은 일상이 아닌 새로운 것을 체험하기를 갈망한다. 영상이미지의 구성 요소는 많지만 그중에 시각적 표현인 색채가 큰 역할을 담당하고 있다. 컬러영화가 등장하기 시작하면서부터 색채는 영상예술의 중요한 구성요소로서 끊임없이 발전하고 혁신적인 영상미술 디자인에서 중요한 역할을 하였다. 영화인들은 1895년 영화가 흑백으로 탄생할 때부터 색채에 대한 관심이 있었다. 이 두 가지 색채로 더 이상 시청자를 만족시키지 못했기 때문에 필름에 색채를 입히는 등 더 많은 색채를 영화 속에서 표현하려고 노력했다. 영상에서의 색채는 표현의 기법이면서도 정신과 사상으로 이해할 수 있다. 색채가 단순히 그냥 존재하는 것이 아니라 인간심리에 강하게 작용하고 있음에 일러주는 것이기도 하다. 색채는 영화 언어의 일부로, 색채언어는 영화 속에서 영화의 사상적 주제를 표현하거나 선명한 캐릭터를 묘사할 수 있으며, 사람들에게 더 직관적으로 메시지를 전달할 수 있다. 본 연구는 색 조명 방식 혹은 배색 방안인 바이섹슈얼 라이팅을 대상으로, 그의 기본적인 색채 구성요소, 즉 핑크색, 파란색 및 보라색이 갖고 있는 색채 특성을 이해해 색채를 통해 인간심리가 어떤 영향을 받고 있는 지에 대해 분석하고 바이섹슈얼 라이팅이 영상에서 나오는 장면들을 결합해 구체적인 사례분석을 했다. 이를 통해 바이섹슈얼 라이팅이 영상에서 색채 속성을 이용해 표현한 색채 언어가 무엇이고 바이섹슈얼 라이팅이 어떻게 색채를 통해 인간심리와 상호 작용하는지를 탐색하였다.

• 한국전자통신학회논문지
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• 제19권1호
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• pp.137-142
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• 2024

최근, 의료 데이터 표현 분야에서 딥러닝 방법들이 사실상의 표준으로 자리잡고 있다. 하지만, 딥러닝 기술은 내재적으로 많은 양의 학습 데이터를 필요로 하므로 대규모의 데이터를 확보하기 쉽지 않은 의료 분야에서는 직접적인 적용이 어려운 실정이다. 특히 뇌신호 모달리티의 경우, 변동성이 크기 때문에 여전히 데이터 부족 문제를 가진다. 이에, 최근 연구에서는 뇌신호의 시간-공간-주파수 특징을 적절하게 추출할 수 있는 딥 뉴럴 네트워크 구조를 설계하거나, 혹은 자가-지도 학습 방법을 도입하여 뇌신호의 신경생리학적 특징을 미리 학습하도록 한다. 본 논문에서는, 최근 각광받는 기술인 뇌-컴퓨터 인터페이스 및 피험자 상태 예측 등의 관점에서 소규모데이터를 다루기 위해 적용되는 방법론에 대한 분석 및 향후 기술 방향성을 제시한다. 먼저 현재 제안되고 있는 뇌신호 표현을 위한 딥 뉴럴 네트워크 구조에 대해 분석한다. 또한 뇌신호의 특성을 잘 학습하기 위한 자가-지도 학습 방법론을 분석한다. 끝으로, 딥러닝 기반 뇌신호 분석을 위한 중요 시사점 및 방향성에 관하여 논한다.

• 대한화학회지
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• 제60권6호
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• pp.415-427
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• 2016

This study analyzed the attributes of the conceptions of $3^{rd}$ to $6^{th}$ grade elementary school students on three states of matter and investigated the characteristics of the classified results of various examples of matter by grades. Through discussion activities, we confirmed the stabilization of conception attributions. For this study, 113 participants from two $3^{rd}$ to $6^{th}$ grade elementary school classes were selected. The concentration analysis (C-factor) and normalized gain (G-factor) of the conceptions for the quantitative analysis of the conception changes were used. The elementary school students retained different percentages of the attributes for states of matter. The characteristic of the grades were different between the 3rd grade and other grades. Based on these results, we pointed out the problems with the present teaching methods in science textbooks and stated the advantages of the effects of the representation of mixtures.

• Journal of Advanced Marine Engineering and Technology
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• 제10권4호
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• pp.31-40
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• 1986

With the tendency toward high speed and high pressure in centrifugal pumps, the problem of sub-synchronous vibration has arisen, caused by the hydraulic forces of the working fluid, such as wearring, balance piston, impeller, etc.. These forces can drastically alter the rotor critical speeds and stability characteristics, and can be acted significant destabilizing forces. For preventing such self-excited vibration, the desing of the rotor system needs, which would secure the stability of the machine. In this paper, a procedure is presented for dynamic modeling of rotor-bearing-seal-impeller systems which consist of rigid disks, distributed parameter finite rotor elements and discrete bearings, seals and impellers. A finite element model including the effects of rotatory inertia and gyroscopic moments is developed using the consistent matrix approach. The technique of dynamic matrix reduction is applied to the shaft matrices to reduce them to a set of matrices of dynamic of significantly fewer degrees of freedom. The representation of bearing, seal and impeller elements is in term of linearized stiffness and damping matrices by reasonably small perturbations from equilibrium. The stability behavior of a typical double suction centrifugal pump is presented. Results show the influence of clearance and flow conditions on running speeds and stability characteristics.

• International Journal of Control, Automation, and Systems
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• 제4권1호
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• pp.77-86
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• 2006

A new method in robot path generation is presented using an analysis of the characteristics of multi-robot collision avoidance. The research is based on the concept of the collision map, where the collision between two robots is presented by a collision region and a crossing curve TLVSTC (traveled length versus servo time curve). Analytic collision avoidance is considered by translating the collision region in the collision map. The 4 different translations of collision regions correspond to the 4 parallel movements of the actual original robot path in the real world. This analysis is applied to path modifications where the analysis of collision characteristics is crucial and the resultant path for collision avoidance is generated. Also, the correlations between the translations of the collision region and robot paths are clarified by analyzing the collision/non-collision areas. The influence of the changes of robot velocity is investigated analytically in view of collision avoidance as an example.

• 복식
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• 제54권5호
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• pp.83-93
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• 2004

The purpose of this study is to examine the relationship between thought systems of post-structuralism by Deleuze and digital culture which is the core topic of social and cultural discussion. And this study also aims to grasp the diversity and movable thinking shown in fashion illustration from the aesthetic thought systems of post-structuralism theory by Deleuze. Furthermore, this study intends to ascertain the concrete representation characteristics and its significance of fashion illustration by analyzing works on the basis of the above-mentioned theory. What are discussed in this paper can be summarized as follows First, this study examined the post-structuralism which supplies the theoretic basis for figuring out the principles of diversity and movable thinking. Second, this study examined the relationship between the open structure and movable individuality of Deleuze who is a representative scholar of post- structuralism. Third, this study analyzed the representative characteristics and aesthetic value to which the principles of post-structuralism, derived from the aesthetic theory of Deleuze, was applied.

• 대한전기학회논문지:전력기술부문A
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• 제50권1호
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• pp.6-12
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• 2001

This paper deals with the development of dynamic equivalents of the Korea Electric Corporation (KEPCO) systems. The weak coupling method is chosen for the most suitable coherency identification to represent the characteristics of the KEPCO system by the dynamic characteristic comparison of several coherency identification methods. Also, this paper shows the detail aggregation of generator groups makes a better representation of the dynamic and static characteristics of the original system than the classical aggregation. The simulation results of the developed KEPCO equivalent system are presented in comparison with the original system to illustrate the validity of the equivalent system are presented in comparison with the original system to illustrate the validity of the equivalent system.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2003년도 추계학술발표회 논문집
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• pp.341-345
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• 2003

This study develops modeling processes for alignment optimization considering characteristics of intersections using genetic algorithms and GIS for road alignment optimization. Since existing highway alignment optimization models have neglected the characteristics of intersections, they have shown serious weaknesses for real applications. In this paper, intersection costs include earthwork, right-of-way, pavement, accident, delay and fuel consumption costs that are sensitive and dominating to alignments. Also, local optimization of intersections for saving good alignment alternatives is developed and embedded. A highway alignment is described by parametric representation in space and vector manipulation is used to find the coordinates of intersections and other interesting points. The developed intersection cost estimation model is sufficiently precise for estimating intersection costs and eventually enhancing the performance of highway alignment optimization models. Also, local optimization of intersections can be used for improving search flexibility, thus allowing more effective intersections. It also provides a basis for extending the alignment optimization from single highways to networks. The presented two artificial examples show that the total intersection costs are substantial and sensitive to highway alignments.

• 한국멀티미디어학회논문지
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• 제23권1호
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• pp.67-73
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• 2020

This paper analyzed the characteristics of Motion Poster (Moster) and discussed the visual expression methods. To this end, the existing literature on motion posters was organized. The visual representation of motion posters was analyzed by dividing into 'Main Visual', 'Mode of Movement', 'Playtime' and 'Sound'. The analysis results were as follows. As motion posters are kind of movie posters, they are made from the original movie poster images, characters, or scenes of the movie. Graphical representations used either photo-realism or computer realism. The movement methods are 'simple movement of visual elements(movement, gesture and rotation, appear or disappear)+fixed camera movement' or' camera movement (zoom in/out, rotate, move) + fixed visual element movement'. Playback time ranged from about 10 seconds to over 1 minute of video, and the longer the video, the higher the probability of including sound.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1996년도 추계학술대회
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• pp.293-296
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• 1996

In this paper, we studied two image characteristics, similarity and smoothness, which give rise to local and global redundancy in image representation. The similarty means that any patterns in the image repeat itself anywhere in the rest of image. The smoothness means that the gray level values within a given block vary gradually rather than abruptly. In this sense, we propose a lossless medical image compression scheme which exploits both types of redundancy. This method segments the image into variable size blocks and encodes them depending on characteristics of the block. The proposed compression schemes works better than other compression schemes such as the huffman, the arithmetic, the Lempel-Ziv and the lossless scheme of JPEG.