• Journal of Institute of Control, Robotics and Systems
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• v.10 no.12
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• pp.1172-1180
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• 2004

Recently, the gene expression data, product of high-throughput technology, appeared in earnest and the studies related with it (so-called bioinformatics) occupied an important position in the field of biological and medical research. The microarray is a revolutionary technology which enables us to monitor several thousands of genes simultaneously and thus to gain an insight into the phenomena in the human body (e.g. the mechanism of cancer progression) at the molecular level. To obtain useful information from such gene expression measurements, it is essential to analyze the data with appropriate techniques. However the high-dimensionality of the data can bring about some problems such as curse of dimensionality and singularity problem of matrix computation, and hence makes it difficult to apply conventional data analysis methods. Therefore, the development of method which can effectively treat the data becomes a challenging issue in the field of computational biology. This research focuses on the gene selection and classification for cancer subtype discrimination based on gene expression (microarray) data.

• Journal of the Korean earth science society
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• v.36 no.5
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• pp.476-483
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• 2015

The high-order Laplacian-type filter, which is capable of providing isotropic and sharp cut-off filtering on the spherical domain, is essential in processing geophysical data. In this study, a spherical high-order filter was designed by combining the Fourier method with finite difference-method in the longitude and latitude, respectively. The regular grid system was employed in the filter, which has uniform angular spacing including the poles. The singularity at poles was eliminated by incorporating variable transforms and continuity-matching boundary conditions across poles. The high-order filter was assessed using the Rossby-Haurwitz wave, the observed geopotential, and observed wind field. The performance of the filter was found comparable to the filter based on the Galerkin procedure. The filter, employing the finite difference method, can be designed to give any target order of accuracy, which is an important advantage being unavailable in other methods. The computational complexity is represented with 2n-1 diagonal matrices solver with n being the target order of accuracy. Along with the availability of arbitrary target-order, it is also advantageous that the filter can adopt the reduced grid to increase computational efficiency.

• English & American cultural studies
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• v.18 no.3
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• pp.115-170
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• 2018

The objective of this paper is to explore Jim's itinerary journey in terms of both Girald's concept of triangular desire and Derrida's concept of event. According to the Girard's mimetic desire theory, human being's desire is not spontaneous like Romanticism thought, but mimetic to the mediator between the subject and the object. Thus there is no romantic desire understood as one's own desire except mimetic desire. In this regard, mimetic desire is compatible with the conception of Derrida's thinking of an event that is resistant to its absolute singularity. Because both mimetic desire and event cannot be defined by the fact of each spatio-temporal specificity, they can not be understood by a traditional metaphysics of presence. In this paper, by using Girard's concept of mimetic desire theory, I showcase why the tragic journey of Jim's telos as a mythic quest for his romantic ego(ipse) cannot help but face his death and by using deconstructive thinking of iterability, this paper analyzes why Jim's romantic ego imitated by the mimetic desire through a mediator cannot be encountered happily with his ipseity until his end. As a victim of triangluar desire, Jim's romantic ego is nothing but a notion of an ipsiety that has been defined in terms of presence central to metaphysics. This paper also makes an attempt to re-interpret some articles contaminated with post-colonial perspectives from Derridean views with deconstructive rigorous reading to those papers to uncover an essential ground of presence.

• The KIPS Transactions:PartB
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• v.10B no.6
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• pp.657-664
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• 2003

Reliable tracking of moving humans is essential to motion estimation, video surveillance and human-computer interface. This paper presents a new approach to human motion tracking that combines appearance-based and model-based techniques. Monocular color video is processed at both pixel level and object level. At the pixel level, a Gaussian mixture model is used to train and classily individual pixel colors. At the object level, a 3D human body model projected on a 2D image plane is used to fit the image data. Our method does not use inverse kinematics due to the singularity problem. While many others use stochastic sampling for model-based motion tracking, our method is purely dependent on nonlinear programming. We convert the human motion tracking problem into a nonlinear programming problem. A cost function for parameter optimization is used to estimate the degree of the overlapping between the foreground input image silhouette and a projected 3D model body silhouette. The overlapping is computed using computational geometry by converting a set of pixels from the image domain to a polygon in the real projection plane domain. Our method is used to recognize various human motions. Motion tracking results from video sequences are very encouraging.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.20 no.3
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• pp.311-319
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• 2007

A Meshfree is a method used to establish algebraic equations of system for the whole problem domain without the use of a predefined mesh for the domain discretization. A point interpolation method is based on combining radial and polynomial basis functions. Involvement of radial basis functions overcomes possible singularity Furthermore, the interpolation function passes through all scattered points in an influence domain and thus shape functions are of delta function property. This makes the implementation of essential boundary conditions much easier than the meshfree methods based on the moving least-squares approximation. This study aims to investigate a stress analysis of structural element between a meshfree method and the finite element method. Examples on cantilever type plate, hollow cylinder and stress concentration problems show that the accuracy and convergence rate of the meshfree methods are high.

• The Journal of the Korea Contents Association
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• v.21 no.5
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• pp.170-181
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• 2021

The purpose of this study is to produce the results of the cultural aspects of the Honam region and present the aesthetic specificity of the traditional dances inherited in the Yehyang Honam region. The research method examined the regional characteristics of Honam dance and the form of Lee Mae-bang, Choi Seon, Jang Geum-do, and Cho Gap-nyeo Salpuri dance, and analyzed the authenticity and dance tendencies of Honam dance through the analysis.The work of understanding the background of local culture and creating cultural values through these representative salpuri dances in Honam region is an attempt to reflect on the essential value of the region as an intangible heritage of the region.