• 한국멀티미디어학회논문지
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• 제19권6호
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• pp.1003-1013
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• 2016

This paper proposes a framework of superpixel-based vehicle detection method using plane normal vector in disparity space. We utilize two common factors for detecting vehicles: Hypothesis Generation (HG) and Hypothesis Verification (HV). At the stage of HG, we set the regions of interest (ROI) by estimating the lane, and track them to reduce computational cost of the overall processes. The image is then divided into compact superpixels, each of which is viewed as a plane composed of the normal vector in disparity space. After that, the representative normal vector is computed at a superpixel-level, which alleviates the well-known problems of conventional color-based and depth-based approaches. Based on the assumption that the central-bottom of the input image is always on the navigable region, the road and obstacle candidates are simultaneously extracted by the plane normal vectors obtained from K-means algorithm. At the stage of HV, the separated obstacle candidates are verified by employing HOG and SVM as for a feature and classifying function, respectively. To achieve this, we trained SVM classifier by HOG features of KITTI training dataset. The experimental results demonstrate that the proposed vehicle detection system outperforms the conventional HOG-based methods qualitatively and quantitatively.

• 한국콘텐츠학회논문지
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• 제15권8호
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• pp.141-148
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• 2015

본 연구는 수많은 콘텐츠가 생산 소비되는 현대사회에서 카툰 본연이 갖고 있는 역할적인 부분을 잃지않고 경쟁력 있는 콘텐츠로 자리매김하기 위해서는 캐릭터의 개발이 필수요소라는 가설에서 시작되었다. 하지만 카툰에서는 캐릭터를 적극적으로 활용한 작품이나 기획이 활발하게 이루어지고 있지 않다. 카툰 캐릭터 개발 연구를 위한 기초연구로서 의인화 의인법에 대해 살펴보고, 의인화가 대표적으로 사용되는 콘텐츠인 우화에서의 캐릭터와 카툰에 등장하는 의인화된 캐릭터의 특징을 비교했다. 우화와 카툰에 등장하는 의인화된 캐릭터는 다음과 같은 특징을 지닌다. 인물이 아닌 또 다른 인격체로서 등장하며, 풍자의 대상을 직설적이지 않고 우회적인 방법으로 순화하여 표현하게 한다. 또한 특수한 상징의미를 풍자하는 대상에게 투영하는 효과를 가진다. 다의적인 해석을 가능하게 하고, 묘사의 축소와 내용을 신속하게 이해하는데 도움을 준다. 그리고 의인화라는 아이러니와 환상적인 요소는 흥미와 웃음을 유발하는 역할을 한다.

• 스마트미디어저널
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• 제5권1호
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• pp.30-37
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• 2016

In recent decades, the study of human brain function has dramatically increased thanks to the advent of Functional Magnetic Resonance Imaging. This is a powerful tool which provides a deep view of the activities of the brain. From fMRI data, the neuroscientists analyze which parts of the brain have responsibility for a particular action and finding the common pattern representing each state involved in these tasks. This is one of the most challenges in neuroscience area because of noisy, sparsity of data as well as the differences of anatomical brain structure of each person. In this paper, we propose the use of appropriate discriminant methods, such as Fisher Discriminant Ratio and hypothesis testing, together with strong boosting ability of Adaboost classifier. We prove that discriminant methods are effective in classifying cognitive states. The experiment results show significant better accuracy than previous works. We also show that it is possible to train a successful classifier without prior anatomical knowledge and use only a small number of features.

• The Journal of Asian Finance, Economics and Business
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• 제6권1호
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• pp.83-89
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• 2019

The purpose of this paper is to examine how the social system of deposit insurance affected the financial market in Korea. Specifically, we want to know how much the risk-seeking behavior of financial institutions has increased or decreased. The most important feature of the deposit insurance system is to prevent the insolvency of financial institutions and to properly protect depositors. In recent studies, it has been argued that characteristics of deposit insurance bring moral hazard of financial institutions and that financial institutions make unreasonably risky investments. Therefore, in this study, we will first examine whether such previous research can be applied to the Korean financial market. Next, we will examine the appropriateness of the differential premium rate that is currently used for each financial institution in the Korean financial market. In order to test the first hypothesis, we used the Capital Asset Pricing Model (CAPM) to calculate the total risk for each financial institution. As a result, significant changes were found in all regions before and after the introduction of the deposit insurance system. As for testing the second hypothesis, we conducted a variance analysis of financial institutions' indexes before and after the introduction of the deposit insurance and we discovered significance of the total risk difference.

• 무역학회지
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• 제44권2호
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• pp.269-282
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• 2019

This study analyzes the effects of participation in the global production network on the income inequality using panel data from 2005 to 2016 for 63 countries. In this study were used fixed effects model with autocorrelation, random effect model with autocorrelation and the GLS method. Results are as follows: First, the economic development level supports the Kuznets hypothesis. And then, the forward participation in global value chains increased income inequality, and the backward participation decreased income inequality. In order to derive more detailed estimation results, we analyzed OECD countries and non-OECD countries. First, OECD countries featured decreased, but increased beyond a certain level as a U-shaped curve, that did not support the Kuznets hypothesis. In contrast, non-OECD countries followed the Kuznets U-curve. Second, participation in the global production network showed that both OECD and non-OECD countries featured increased income inequality. In contrast, backward participation appears to mitigate income inequality both in OECD and non-OECD countries. Finally, the ratio of labor and capital is significant in mitigating income inequality in non-OECD countries in which they feature backward participation in production networks. This can be interpreted as developing economies participate in the global production network due to increased capital accumulation and increased the labor productivity.

• 비교문화연구
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• 제45권
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• pp.109-143
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• 2016

본 연구는 번역된 텍스트들에 전형적으로 나타나는 언어적 특성들인 번역 보편소(translation universals)에 관한 코퍼스 기반 연구이다. 지금까지의 번역 보편소 연구는 언어계통상 서로 밀접한 관련이 있는 영어와 다른 유럽어 사이의 번역에 집중되어 왔으며, 다른 한편으로 주로 문학 장르의 분석에 치중되어 있다는 아쉬움을 지닌다. 본 연구에서는 관련 연구가 지닌 이러한 두 가지 주요 문제점을 보완하고자 하는 노력의 일환으로 한국어를 원문으로 하는 영어 번역 가운데 비문학 장르인 신문언어 텍스트를 분석대상으로 선택하였다. 먼저, 번역된 신문영어 텍스트와 비번역 신문영어 텍스트를 정해진 기준에 따라 수집하여 번역과 비번역 영어(translated and non-translated English)로 구성된 대응코퍼스(comparable corpora)를 구축하였다. 이렇게 구축된 대응 코퍼스를 바탕으로 기존 문헌에서 논의된 번역 보편소 가설 가운데 가장 대표적인 단순화(simplification), 명시화(explicitation), 규범화(normalization), 평준화(leveling-out) 현상이 한국어 신문의 영어 번역 텍스트에서 어떠한 양상을 보이는지 살펴봄으로써 각 가설들이 지니는 타당성을 검증해보고자 하였다. 본 연구의 분석결과를 종합해보면, 단순화와 규범화를 제외한 나머지 하위가설의 언어적 특성들은 모든 언어쌍과 모든 텍스트 장르에 걸쳐 일반화하기에 다소 한계가 있는 것으로 나타났다. 또한, 번역 보편소의 개념 규정이나 분석지표의 정교화, 그리고 결과의 일반화에는 신중한 접근이 필요할 것으로 보인다.

• 천문학회보
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• 제38권2호
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• pp.62.2-62.2
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• 2013

Recent spectroscopic observations have provided evidence for complex chemical evolution by supernovae and/or asymptotic giant branch (AGB) stars in the two metal-poor globular clusters (GCs) NGC2419 and M15. In particular, the horizontal branches (HBs) of these metal-poor GCs are very extended in the Hertzsprung-Russell diagram. The origin of these peculiar features, as well as that for the Sandage period-shift effect observed in these clusters, are yet to be understood. Here we show, by constructing population models including the Nitrogen enhanced subpopulation, that the second generation populations in these clusters would be enhanced not only in Helium, but also in Nitrogen. This working hypothesis can simultaneously explain the observed extended feature on the HB and the period-shift of RR Lyrae variables.

• Journal of Electrical Engineering and Technology
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• 제3권3호
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• pp.436-443
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• 2008

This paper presents a new method for building detection and reconstruction from aerial images. In our approach, we extract useful building location information from the generated disparity map to segment the interested objects and consequently reduce unnecessary line segments extracted in the low level feature extraction step. Hypothesis selection is carried out by using an undirected graph, in which close cycles represent complete rooftops hypotheses. We test the proposed method with the synthetic images generated from Avenches dataset of Ascona aerial images. The experiment result shows that the extracted 3D line segments of the reconstructed buildings have an average error of 1.69m and our method can be efficiently used for the task of building detection and reconstruction from aerial images.

• 전자공학회지
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• 제36권11호
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• pp.66-82
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• 2009

Probabilistic atlases for the human brain structure are more suitable than single brain atlases for representing population anatomy. In this study, we hypothesized the group-specific probabilistic atlas for accurate characteristic feature coding. Our proposed method for a new group comparison study, using a subpopulation specific probabilistic atlas, was based on this hypothesis. A knowledge-based automatic labeling technique using nonlinear registration was applied to encode group-specific regional probabilistic information. Direct atlas-based comparison using volume counting above the probability threshold, distance measurement and correlation analysis were performed based on the probabilistic atlas. Here, we applied this method for comparison between Korean and occidental groups. The results showed that this method could provide simple but intuitive regions of interest-based group analysis for the entire cortex area.

• The International Journal of Costume Culture
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• 제12권1호
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• pp.13-25
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• 2009

This research is progressed to look out for efficient expression-elements of eroticism used in advertisements. Since these expressions of eroticism appealing to sex which is one of the primitive instincts of mankind are increasing in advertisements of cosmetic products which are used more often by recent high-rate-growth and the elevation of living conditions. The most usual expression-elements of eroticism in advertisement are exposure, pose, fashion style, make up, hair style and color. To analyze those expression-elements we made four pieces of fashion advertisement photos with four different types and surveyed both fashion majored students and non-fashion majored students. We applied regression analysis, ANOVA, and frequency analysis to verify the hypothesis. We found that in eroticism, the pose was the most important cognitive feature among the expression-elements and degree of cognition are varied according to major field and sexual interest. As a result, degree of cognition which effected by expression-elements will be varied even in same advertisement. In particular, convincing that the pose was the significant factor of eroticism cognition, expression of eroticism in advertisement would be more diverse and daring.