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Anyang, South Korea

Kim S.,Chungnam National University | Cho S.,Anyang University, South Korea
Journal of the American Society for Information Science and Technology | Year: 2013

Korea, along with Asia at large, is producing more and more valuable academic materials. Furthermore, the demand for academic materials produced in non-Western societies is increasing among English-speaking users. In order to search among such material, users rely on keywords such as author names. However, Asian nations such as Korea and China have markedly different methods of writing personal names from Western naming traditions. Among these differences are name components, structure, writing customs, and distribution of surnames. These differences influence the Anglicization of Asian academic researchers' names, often leading to them being written in various fashions, unlike Western personal names. These inconsistent formats can often lead to difficulties in searching and finding academic materials for Western users unfamiliar with Korean and Asian personal names. This article presents methods for precisely understanding and categorizing Korean personal names in order to make academic materials by Korean authors easier to find for Westerners. As such, this article discusses characteristics particular to Korean personal names and furthermore analyzes how the personal names of Korean academic researchers are currently being written in English. © 2012 ASIS&T. Source

Lee S.-H.,Anyang University, South Korea
Engineering Applications of Artificial Intelligence | Year: 2015

Feature selection has commonly been used to remove irrelevant features and improve classification performance. Some of features are irrelevant to the learning process; therefore to remove these irrelevant features not only decreases training and testing times, but can also improve learning accuracy. This study proposes a novel supervised feature selection method based on the bounded sum of weighted fuzzy membership functions (BSWFM) and Euclidean distances between their centers of gravity for decreasing the computational load and improving accuracy by removing irrelevant features. This study compares the performance of a neural network with a weighted fuzzy membership function (NEWFM) without and with the proposed feature selection method. The superiority of the NEWFM with feature selection over NEWFM without feature selection was demonstrated using three experimental datasets from the UCI Machine Learning Repository: Statlog Heart, Parkinsons and Ionosphere. 13 features, 22 features, and 34 features were used as inputs for the NEWFM without feature selection and these resulted in performance accuracies of 85.6%, 86.2% and 91.2%, respectively, using Statlog Heart, Parkinsons and Ionosphere datasets. 10 minimum features, 4 minimum features and 25 minimum features were used as inputs for the NEWFM with feature selection and these resulted in performance accuracies of 87.4%, 88.2%, and 92.6%, respectively, using Statlog Heart, Parkinsons and Ionosphere datasets. The results show that NEWFM with feature selection performed better than NEWFM without feature selection. © 2015 Elsevier Ltd. All rights reserved. Source

Wang B.,Huazhong University of Science and Technology | Guan Z.-H.,Huazhong University of Science and Technology | Yuan F.-S.,Anyang University, South Korea
Automatica | Year: 2011

In this paper, the optimal tracking problem under control energy constraint is studied. The disturbance in the upstream channel and down channel is adequately considered. Some new results are derived and it is shown that the performance limitation is tightly dependent on the non-minimum phase zeros and the unstable poles. In addition, the performance limitation, which is greater than that of the disturbance only in the down channel, depends on other new non-minimum phase zeros. Finally, the example explains and validates the conclusion. © 2011 Elsevier Ltd. All rights reserved. Source

Wang C.M.,Anyang University, South Korea
Physical Review B - Condensed Matter and Materials Physics | Year: 2010

We systematically study the anisotropic magnetoresistance (AMR) in a two-dimensional electron system with a combined Rashba and Dresselhaus spin-orbit interaction by exactly solving the kinetic equation. This AMR originates from the combination of spin-orbit coupling and in-plane magnetization, instead of the combined effect of spin-orbit coupling and polarized impurities emphasized in previous theoretical studies. A combined electromagnetic potential is taken into account to investigate the effect of impurity scattering. The electric component of the potential is long ranged, and both the positions and the directions of the magnetic moments of magnetic impurities are random. For long-range electric collision, AMR occurs and AMRs due to remote charged scatterers and background ones are comparable. For pure magnetic scattering, the magnitude of AMR is tiny when the magnetization is smaller than a singular magnetization. However, the anisotropy of spin-spin coupling can enhance the AMR and its magnitude reaches up to nearly 100% when only the majority band is occupied. For the combined electromagnetic potential, the magnitude of AMR is not very large and its sign is always positive when the electric part of scattering is remote. A sudden step of AMR emerges when the value of magnetization is near the Fermi energy, which is due to the uncontinuity of the density of state. © 2010 The American Physical Society. Source

Park C.M.,Anyang University, South Korea | Park J.J.,Yonsei University | Lee S.H.,Yonsei University | Seo Y.M.,Myongji University | Kim C.K.,Yonsei University
Physical Review Letters | Year: 2011

We amplified acoustic evanescent waves using metamaterial slabs with a negative effective density. For the amplifying effect of the slab to overcome the dissipation, it is necessary that the imaginary part of the effective density is much smaller than the real part, a condition not satisfied so far. We report the construction of membrane-based two-dimensional negative-density metamaterials which exhibited remarkably small dissipation. Using a slab of this metamaterial we realized a 17-fold net amplitude gain at a remote distance from the evanescent wave source. Potential applications include acoustic superlensing. © 2011 American Physical Society. Source

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