• East Asian Economic Review
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• v.18 no.4
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• pp.367-394
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• 2014

In this study, we examined the fractal structure of the Nikkei225, HangSeng, Shanghai Stock Exchange and Straits Times Index of Singapore. Empirical analysis was performed via non-parametric, semi-parametric long memory tests and also fractal dimension calculations. In order to avoid spurious long memory features, besides the Detrended Fluctuations Analysis (DFA), we also used Smith's (2005) modified GPH method. As for fractal dimension calculations, they were conducted via Box-Counting and Variation (p=1) tests. According to the results, while there is no long memory property in log returns of any index, we found evidence for long memory properties in the volatility of the HangSeng, the Shanghai Stock Exchange and the Straits Times Index. However, we could not find any sign of long memory in the volatility of Nikkei225 index using either the DFA or modified GPH test. Fractal dimension analysis also demonstrated that all raw index prices have fractal structure properties except for the Nikkei225 index. These findings showed that the Nikkei225 index has the most efficient market properties among these markets.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.11 no.8
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• pp.3950-3964
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• 2017

With the increasing popularity of 3D technology such as 3D printing, 3D modeling, etc., there is a growing need to search for similar models on the internet. Matching non-rigid shapes has become an active research field in computer graphics. In this paper, we present an efficient and effective non-rigid model retrieval method based on topological structure and local volume. The integral geodesic distances are first calculated for each vertex on a mesh to construct the topological structure. Next, each node on the topological structure is assigned a local volume that is calculated using the shape diameter function (SDF). Finally, we utilize the Hungarian algorithm to measure similarity between two non-rigid models. Experimental results on the latest benchmark (SHREC' 15 Non-rigid 3D Shape Retrieval) demonstrate that our method works well compared to the state-of-the-art.

• Journal of the Korea Furniture Society
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• v.20 no.1
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• pp.95-104
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• 2009

The study was carried out to analyze wood quality of coffin board, the wood species of coffin excavated in Youngdong, Korea. All coffin woods were identified as hard pines, Korean red pine(Pinus densiflora S. & Z.). According to wood quality of coffins, inner coffins of Bae Cheon-Jo and his wife showed similarity and dissimilarity comparing with several literatures. The similarity was in the structure of panels, bottom lining board and charcoal layer, and the dissimilarity was in jointing. From the analysis of fibrous materials attached to coffin woods, the paper mulberry and cotton fibers were identified. In the inner coffin of Bae Cheon-Jo, tool traces by handle planer were observed.

• Journal of Ocean Engineering and Technology
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• v.22 no.5
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• pp.39-43
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• 2008

For a partially filled and deeply submersed membrane container, an analytic solution for similarity shape was studied. The static shape of a membrane container can be expressed as a set of nonlinear ordinary differential equations. These equations are combined into an integrable equation. The solution of the equation is derived in terms of elliptic integrals, the arguments of which contain an unknown at the point of inflection. The point of inflection is determined by using the boundary condition at a separating point. Some characteristic values of the similarity shape were evaluated and the shapes are illustrated.

• The Korean Journal of Ecology
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• v.18 no.2
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• pp.207-218
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• 1995

Five non-stratified plant communities, Dichanthium-Artemisia-Themeda, Dichanthium- Plectranthes-Themeda, Plectranthes-Carex-Myrine, Heteropogon- Dichanthium-Dodonaea and Artemisia-Cynodon-Ber-beris were recognized in Girbanr hills, District Swat, during autumn, 1992. The indices of similarity showed that the communities were dissimilar. The percentage of leptophyllous and nanophyllous, terophytic and nanophanerophytic species were higher than other groups. These indicate dry and disturben conditions. Due to autumn season most of the species were entering in dormant stage. There was no tree layer on southern slopes while northern slopes had a poor layer of Pinus roxburghii. Deforestation, uprooting, terrace cultivation and overgrazing followed by erosion are the main ecological problems. The presence of isolated trees of Pinus roxburghii and stunted Olea ferruginea indicate that the original vegetation might have been of chirpine or Olea-Pinus type. The area having resource potential can be changed into a forest or rangeland by proper protection and management. Suggestions in favour of improvement are given.

• Journal of the Korean Society for information Management
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• v.24 no.1 s.63
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• pp.103-120
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• 2007

Node is the semantic unit and a part of structured document. Information retrieval from structured documents offers an opportunity to go subdivided below the document level in search of relevant information, making any element in an structured document a retrievable unit. The node-based document retrieval constitutes several similarity calculating methods and the extended node retrieval method using structure information. Retrieval performance is hardly influenced by the methods for determining document similarity The extended node method outperformed the others as a whole.

• Korean Institute of Interior Design Journal
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• v.14 no.5 s.52
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• pp.62-70
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• 2005

Basically, modern architect's translation of relations between architectural space and human beings is focused upon the space and the way the space is experienced. Thus, the architecture is construed not as the finalized and fixed structure but as something undetermined and In progress. Here, we can identify the similarity between current trend and theory on process. Experience argument in this study is based upon such a similarity. And for your understanding of the spatial concept broached in the following experience argument, I've presented the analysis of Ben van Berkel's and Kazuyo Sejima's works that represent user's experiences in discussing art works. Taking a step further, I'll try to provide the true definition of being in progress and the potential of the architecture, thereby seeking the value and meaning of trends in modern architecture. In this regard, this study is aimed to analyze the attributes of experiences in progress identified in the art works of Ben van Berkel and Kazuyo Sejima and to extract and analyze the architectural concepts therein.

• The Journal of the Korea Contents Association
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• v.11 no.12
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• pp.52-59
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• 2011

In this paper, we propose an indexing method to support efficient similarity search for sequence databases. We present a new distance measurement called minimum DTW distance to enhance the filtering effects. The minimum DTW distance is to measure the minimum distance between a sequence data and the group of similar sequences. It enables similarity search through hierarchical index structure by filtering sequence databases. Finally, we show the superiority of our method through some experiments.

• Journal of KIISE:Databases
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• v.30 no.3
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• pp.237-251
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• 2003

In this paper, we propose a video retrieval system to search logical structure and semantic contents of video data efficiently. The proposed system employs a layered modelling method that orBanifes video data in raw data layer, content layer and key frame layer. The layered modelling of the proposed system represents logical structures and semantic contents of video data in content layer. Also, the proposed system supports various types of searches such as text search, visual feature based similarity search, spatio-temporal relationship based similarity search and semantic contents search.

• Journal of Internet Computing and Services
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• v.18 no.4
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• pp.7-17
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• 2017

Despite various types of online social networks having different topological and functional characteristics, the kinds of online social networks considered in social recommendations are highly restricted. The pervasiveness of social networks has brought scholarly attention to expanding the scope of social recommendations into more diverse and less explored types of online social networks. As a preliminary attempt, this study examined the information-sharing patterns of a new type of online social network - unilateral (directed) network - and assessed the feasibility of the network as a useful information source. Specifically, this study mainly focused on the presence of shared interests in unilateral networks, because the shared information is the inevitable condition for utilizing the networks as a feasible source of personalized recommendations. As the results, we discovered that user pairs with direct and distant links shared significantly more similar information than the other non-connected pairs. Individual users' social properties were also significantly correlated with the degree of their information similarity with social connections. We also found the substitutability of online social networks for the top cohorts anonymously chosen by the collaborative filtering algorithm.