• The Journal of Korean Association of Computer Education
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• 제13권5호
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• pp.91-102
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• 2010

Star graph is a well-known interconnection network to further improve the network cost of Hypercube and has good properties such as node symmetry, maximal fault tolerance and strongly hierarchical property. In this study, we will suggest embedding scheme among star graph and pancake graph, bubblesort graph, which are variations of star graph. We will show that bubblesort graph can be embedded into pancake and star graph with dilation 3, expansion 1, respectively and pancake graph can be embedded into bubblesort graph with dilation cost O($n^2$). Additionally, we will show that star graph can be embedded into pancake graph with dilation 4, expansion 1. Also, with dilation cost O(n) we will prove that star graph can be embedded into bubblesort graph and pancake graph can be embedded into star graph.

• The Korean Journal of Applied Statistics
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• 제23권5호
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• pp.783-797
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• 2010

Based on the importance of asset allocation in the return of an investment portfolio, this article attempts to verify the appropriateness of mutual funds as means of investment to obtain optimal asset allocation. The return-based style analysis is applied to determine a mutual fund's allocation(or a style) among a set of specified asset classes. Assuming a particular investor who defines a range allowed a fund's style to differ from its original one, it is examined whether or not the fund style is continued over an investment time horizon. After verifying the fact that the original style of the investment fails to remain unchanged from the empirical analysis limited to domestic equity mutual funds, we further investigated the reasons for the style drift. Despite several limitations of the analysis, it yields the conclusion that domestic equity mutual funds do not seem to be an appropriate investment tool to achieve a target asset allocation.

• Journal of the Institute of Electronics Engineers of Korea CI
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• 제47권5호
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• pp.25-34
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• 2010

By introducing additional nodes called Steiner points, the problem of Steiner Minimum Tree whose length can be shorter than Minimum Spanning Tree and which connects all input terminal nodes belongs to Non-Polynomial Complete domain. Though diverse heuristic methods can be applied to the problem, most of them may meet serious pains in computing and waiting for a solution of the problem with numerous input nodes. For numerous input nodes, an efficient PTAS approximation method producing candidate unit steiner trees with portals in most bottom layer, merging them hierarchically to construct their parent steiner trees in upper layer and building swiftly final approximation Steiner tree in most top layer is suggested in this paper. The experiment with 16,000 input nodes and designed 16 unit areas in most bottom layer shows 85.4% execution time improvement in serial processing and 98.9% in parallel processing comparing with pure Steiner heuristic method, though 0.24% overhead of tree length. Therefore, the suggested PTAS Steiner tree method can have a wide range applications to build a large scale approximation Steiner tree quickly.

• Culinary science and hospitality research
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• 제17권5호
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• pp.15-29
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• 2011

In this study, I examined the problems of the current barista curriculum and sought how to improve them by feedback from domestic specialized baristas and comparative analyses of the training programs that take place in barista educational institutions. In order to identify problems in curriculum and what to be improved, I gained the opinions of 15 experts who are currently teaching students in barista educational institutions using Delphi technique. To sum up the opinions of experts, working level education of coffee has to be mainly done and substantial educations for employment such as cafe operating technique and marketing are needed. In addition, experts suggested enhancing service courses considering the nature of working in contact with customers and the course for baking goods that takes up a lot of sales. As a result of examining the current curriculum in the institutions for baristas, it seems necessary to supplement these training courses that experts suggested because the educations are very poor.

• KIPS Transactions on Software and Data Engineering
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• 제11권11호
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• pp.465-472
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• 2022

In this paper, the style synthesis network is trained to generate style-synthesized video through the style synthesis through training Stylegan and the video synthesis network for video synthesis. In order to improve the point that the gaze or expression does not transfer stably, 3D face restoration technology is applied to control important features such as the pose, gaze, and expression of the head using 3D face information. In addition, by training the discriminators for the dynamics, mouth shape, image, and gaze of the Head2head network, it is possible to create a stable style synthesis video that maintains more probabilities and consistency. Using the FaceForensic dataset and the MetFace dataset, it was confirmed that the performance was increased by converting one video into another video while maintaining the consistent movement of the target face, and generating natural data through video synthesis using 3D face information from the source video's face.

• Journal of the Korea Society of Computer and Information
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• 제28권8호
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• pp.31-38
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• 2023

Style transfer is one of deep learning-based image processing techniques that has been actively researched recently. These research efforts have led to significant improvements in the quality of result images. Style transfer is a technology that takes a content image and a style image as inputs and generates a transformed result image by applying the characteristics of the style image to the content image. It is becoming increasingly important in exploiting the diversity of digital content. To improve the usability of style transfer technology, ensuring stable performance is crucial. Recently, in the field of natural language processing, the concept of Transformers has been actively utilized. Attention maps, which forms the basis of Transformers, is also being actively applied and researched in the development of style transfer techniques. In this paper, we analyze the representative techniques SANet and AdaAttN and propose a novel attention map-based structure which can generate improved style transfer results. The results demonstrate that the proposed technique effectively preserves the structure of the content image while applying the characteristics of the style image.

• RED RIBBON
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• 통권79호
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• pp.20-22
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• 2008

우리나라에서도 몇몇 연예인이 에이즈 예방 및 퇴치 홍보대사로 활동하고 있다. 하지만 이번에 소개하는 미국 KCA의 'I AM AFRICAN' 캠페인처럼 스타들을 적극적으로 활용한 홍보 캠페인은 없었다. 할리우드 스타들이 대거 참여한 미국 KCA의 캠페인과 MTV의 포르투갈 콘돔 착용 권장 캠페인, 그리고 자유분방한 표현의 콘돔광고 몇 편을 소개한다.

• Proceedings of the IEEK Conference
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• 대한전자공학회 2003년도 하계종합학술대회 논문집 Ⅲ
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• pp.1573-1576
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• 2003

스타 그래프와 팬케익 그래프는 하이퍼큐브가 갖는 좋은 성질을 가지면서 하이퍼큐브보다 망 비용이 적은 값을 갖는 상호연결망이다. 본 논문에서는 그래프의 에지 정의를 이용하여 스타 그래프 S/sub n/은 팬케익 그래프 P/sub n/에 연장율 4, 확장율 1에 임베딩 가능함을 보인다.

• The Monthly Technology and Standards
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• 통권101호
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• pp.22-23
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• 2010

미국 에너지스타 제도가 강화됨에 따라 기술표준원은 국내의 관련 업계와 단체의 전문가들로 T/F를 구성하고 대응방안을 논의하였다. 우선적으로 미국 정부에 시행연기를 요청하고, KOLAS(국내 시험소인정기구)가 인정한 국내 시험소에서도 에너지스타 성적서를 발급받을 수 있는 방안을 추진하기로 하였다.

• Proceedings of the Korean Information Science Society Conference
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• 한국정보과학회 2003년도 가을 학술발표논문집 Vol.30 No.2 (1)
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• pp.373-375
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• 2003

최근에 하이퍼큐브의 망비용을 개선한 상호연결망 하이퍼-스타가 제안되었다. 본 논문에서는 상호연결망 하이퍼-스타 HS(2n,n)가 제안된 매핑 알고리즘에 의해 노드 대칭임을 보인다.