• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.608-610
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• 2023

의료 분야에서 AI 모델의 활용이 증가하고 있지만, 모델의 예측 불확실성을 정확하게 평가하고 표현하는 것이 중요하다. 본 연구는 이러한 문제를 해결하기 위해 AI-driven 방식을 제안하며, 특히 의료 영상 변환 모델에 대한 불확실성 표현과 데이터 한계 극복 방법론을 제안한다. 제안된 AI-driven 안저영상 변환 모델은 기존 GAN과는 다르게 구조가 이루어져 있으며, 신뢰도가 낮은 영역을 구분하고 시각화하여 표현할 수 있다. 실험 결과, 제안된 방법은 기존 모델과 비교하여 영상 변환 성능이 크게 향상되었으며, 불확실성에 대한 정확도 평가에서도 AI-driven 방식이 높은 성능을 보인다. 결론적으로, 본 연구는 AI-driven 방식을 통해 의료 AI에서의 불확실성 표현의 가능성을 확인하였으며, 이 방식이 데이터의 한계와 불확실성을 극복할 수 있을 것으로 기대된다.

• The Journal of the Korea Contents Association
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• v.19 no.3
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• pp.100-113
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• 2019

The purpose of this study was to confirm the characteristics of released prisoners through demographic and sociological variables and to investigate the effects of childhood traumatic experiences on family functioning and the mediating effects of anger expression method. For this purpose, Korea Rehabilitation Agency were selected and finally 400 released prisoners were analyzed. As a result, it appeared that anger expression method played a role of mediating variable when childhood trauma experience affects family functioning. Childhood trauma experience not only directly affects family functioning, but indirectly affects family functioning through anger expression method and the anger expression method played a role as partial mediating variable. Based on the results of this study, we emphasized the need for intervention and education for anger expression method in psychological counseling interventions to improve family functioning as a way to suppress the second offense of released prisoners with childhood abuse experience.

• Proceedings of the Korea Contents Association Conference
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• 2009.05a
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• pp.229-234
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• 2009

The field of design is expanding and diversified in modern society while several new functions are presented by converging a variety of fields of knowledge. There are changes happening in people's way of thinking, sensitivity and behaviors as they are seeking for a new way of expression and aesthetic values. Accordingly, the black and white drawings are increasing as a new way of recognition of tradition or new materials. This paper is to make a study of the expression methods and their analysis of the black and white drawings, based on their historical and social background, and has suggested black and white expression methods as an aesthetic value consistent with the traditional oriental beauty and emotional sensitivity. This paper is also aimed at studying practical usage of the expression of black and white drawings shown in the TV-CM design, and expanding the scope of design by analyzing the conception, features, and classification of the black and white drawings and searching for a new technique or an oriental expression method.

• Journal of the Korean Society for Library and Information Science
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• v.36 no.4
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• pp.175-205
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• 2002

Information visualization in information retrieval is a creating tool that enables us to observe, manipulate, search, navigate, explore, filter, discover, understand, interact with large volumes of data for more rapidly and far more effectively to discover hidden patterns. The focus of this study is to investigate and analyze information visualization techniques in information retrieval system in the three-schematic levels. In result, it was found that first, scientific data, documents, and retrieval result information are visualized through various techniques. Second, information visualization techniques which facilitate navigation and interaction are zoom and pan, focus+context techniques, incremental exploration, and clustering. Third, the visual metaphors used by the visualization systems are presented in the linear structure, hierarchy structure, network structure, and vector scatter structure.

• Journal of the Korean Institute of Telematics and Electronics
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• v.27 no.2
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• pp.151-157
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• 1990

This paper presents a method for rapid wire frame drawing of the 3D objects represented by the CSG scheme. When the two CSG trees are combined into one, the intersection parts of the polygons constituting the object corresponds to each subtree are computed, and the boundary representation of the combined object is obtained according to the given combinational operator and stored in the root node. The boundary representation in the root node is used in the wireframe drawing of the object and later computation of boundary representation. Bezier surface is taken as one of the primitive object the scan-line algorithm is used, which subdivides each scan-line into the spans where no polygon is intersected, and renders each span with the CSG representation of the object.

• Proceedings of the Korean Society of Computer Information Conference
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• 2023.01a
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• pp.385-387
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• 2023

본 논문에서는 물감의 유체성, 확산성, 흡착성, 흡수성 및 응고성과 같은 물감의 물리적 특성을 활용하여 사실적인 페인트 시뮬레이션할 수 있는 입자 기반 프레임워크를 제안한다. 현실에서는 물감이 흐르고, 확산하는 것뿐만 아니라 흡착하거나 시간에 지남에 따라 응고되는 현상을 쉽게 관찰할 수 있다. 본 논문에서는 이런 현상을 사실적으로 표현하기 위하여 SPH(Smoothed-particle hydrodynamics) 방식을 시뮬레이션 하였으며 Isotropic kernel이 아닌 Anisotropic kernel을 사용하여 확산 과정을 표현하는 방식을 소개한다. 우리의 방법은 Fick's law를 바탕으로 물질 전달 방식을 이용한 확산 과정을 표현하였으며, 시간이 지남에 따라 굳어가는 응고성, 그리고 Van der waals 힘을 기반으로 한 흡착 과정을 동시적으로 표현하여 사실적인 페인트를 구현하였다.

• Cartoon and Animation Studies
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• s.51
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• pp.59-82
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• 2018

This study notes that the concept of painterliness, as defined by Heinrich $W{\ddot{o}}lfflin$, can apply to represent features in $Micha{\ddot{e}}l$, Dudok de Wit's animated short film Father and Daughter. It intends to examine the animated film's visual representation and narrative features in terms of painterliness. Comparing the Renaissance art style of the 16th century to the Baroque art style of the 17th century, $W{\ddot{o}}lfflin$ conceptualized the features of painterly style. In respect to this animated film, the images drawn by drawing tools are represented are represented by irregular and ambiguous shapes and meet $W{\ddot{o}}lfflin^{\prime}s$ conditions for painterly representation. Such a representation method in this animated film effectively functions as a double entendre or ambiguous narrative, while playing a key role in representing lyricism. In this animated film, painterliness contrasts with clarity, which commercial animated films provide, and plays a critical role in the representation methods utilized by auteurist animation directors. Painterliness in animated films is an element that should be highlighted, especially in the contemporary world where the forms of representation are becoming increasingly monolithic due to digital techniques. Continued research is greatly needed on this subject matter. Based on Father and Daughter, this study aims to examine the method of painterly representation that can be used in animation films, to explore its meaning and to underscore the importance of diversity in the forms of representation in animated films.

• School Mathematics
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• v.15 no.3
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• pp.633-650
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• 2013

The aim of this paper is to explore and understand, using in-depth interviews, the participant's interests and discourse analytic expressions in studying the notion of infinity and limit. In addition we tried to understand how the participant's ways of dealing with math and thinking patterns on the polygons whose boundary is infinite but area is finite as they brought up such examples. Further follow-up questions are posed on the infinite sum of a smallest number close to 0 and the sum of infinite sets of different smallest numbers close to 0. Larger aspects of two pre-service teachers' subjective thinking patterns and colloquial discourses were sketched by contrasting the three posed tasks. Cross case discussions are provided with several suggestions for the future research directions.

• Journal of Internet Computing and Services
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• v.16 no.3
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• pp.21-32
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• 2015

Since spatio-temporal local features for video representation have become an important issue of modeless bottom-up approaches in action recognition, various methods for feature extraction and description have been proposed in many papers. In particular, BoF(bag of features) has been promised coherent recognition results. The most important part for BoF is how to represent dynamic information of actions in videos. Most of existing BoF methods consider the video as a spatio-temporal volume and describe neighboring 3D interest points as complex volumetric patches. To simplify these complex 3D methods, this paper proposes a novel method that builds BoF representation as a way to learn 2D interest points directly from video data. The basic idea of proposed method is to gather feature points not only from 2D xy spatial planes of traditional frames, but from the 2D time axis called spatio-temporal frame as well. Such spatial-temporal features are able to capture dynamic information from the action videos and are well-suited to recognize human actions without need of 3D extensions for the feature descriptors. The spatio-temporal BoF approach using SIFT and SURF feature descriptors obtains good recognition rates on a well-known actions recognition dataset. Compared with more sophisticated scheme of 3D based HoG/HoF descriptors, proposed method is easier to compute and simpler to understand.

• Korean Journal of Childcare and Education
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• v.10 no.2
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• pp.5-19
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• 2014

The purpose of this study was to examine the effects of pre-service early childhood teachers' self-expression and stress coping style on their human nature. More specifically, this study attempted to investigate how teachers' human nature, self-expression and stress coping style are correlated with another and determine how much human nature is influenced by the other variables, ultimately providing basic information necessary for improving the humanity of pre-service preschool teachers. Findings of the study can be summarized as follows. First, correlations among pre-service early childhood teachers' self-expression, stress coping style and human nature were investigated to find that those teachers' human nature and self-expression have close relationships with each other and that the two variables are significantly related with their stress coping style. Second, the influences of pre-service preschool teachers' self-expression and stress coping style on their human nature were analyzed to find that the human nature of those teachers as a whole and some sub-areas of the variables like positive self-concept and human creativity have significant relationships with their self-expression and stress coping style. Finally, based on these findings, this study discussed how to establish and manage a curriculum that helps to improve the human nature of pre-service early childhood teachers of junior colleges. It also hopes to find effective ways to manage the department of education.