• Journal of the Korean Society of Costume
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• v.52 no.3
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• pp.111-122
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• 2002

The study of traditional costume is significant in terms of figuring out of the reality of its originality and enrich the costume culture of today. The purpose of this study is to analyze the aesthetic characteristics and to contemplate the aesthetic values of the Kokuryo costume. Kokuryo costume were characterized with the simpleness in its clothing constructions. The spaces found on the dresses were emphasized giving a geometric characteristics and abstract images. Many different colors were used for tops, bottoms, and border elements showing value contrast in each parts of dress. Patterns were simplified in a dot or stripe shapes impling a certain symbols. Dot patterns were varied in its shapes. In general. the decorative elements were simple and eliminated. Through the process of investigating these aesthetic characteristics, aesthetic values were found. The aesthetics of nature were favoured and tradition were respected. Religious mind were favoured and progressive spirit were endowed by the Kokuryo people. They have pursued the diversities and many changes in visual forms of dresses which were the manifestations of their esprit.

• Journal of the Korean Society of Costume
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• v.22
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• pp.243-262
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• 1994

L'niteret majeur de cette etude reside dans I'interpretation des images vestimentaired au Moyen-Age en France sur le plan esthetique et religieux. Comme d'interessantes hypotheses de tra-vail les images religieuses temoignent de la transformation de I'esprit religieux, artistique mais aussistyle de vie, de la mode et du gout a l'epoque segeuriale. D'apres les icons de la ste. Vierge, on peut y noter de multiples sources d'influence. le style autochtone fancais-I'art courtois le style gothique intenational les types de repre'sentation siennoise le Realisme neerlandais le Naturalisme italien Comme le role du vetement d'apres les icons de la ste. Marie le Moye n d'identification de la ste. Marie L'Objet de connexion entre les figures et I'architecture L'Element decoratif dans la peinture L'Intermediaire expressif et approfondi du theme On peut aussi dresser I'iconographie et le symbolisme vestimentairedans le monde chretien.

• Journal of the Korean Society of Clothing and Textiles
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• v.3 no.1
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• pp.25-30
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• 1979

Le propos de la presente consideration est de deceler Ie probleme du costume au niveau de probleme de l'art pur qui, comme dit Hegel, repond a un besoin primitif qui consiste a exterioriser et a concretiser les representations et les idees nees dans I'esprit humain. II va de soi que c'est une sorte de problemes appartenants a la theorie generale du costume. Mais il nous semble que chez nous on a neglige d'analyser les elements du costume sous l'angle de cette exteriorisation de l'idee esthetique que nous avons essay de souligner. Nous avons pris cette fois, pour un modele de ce sujet, les costumes sous Justinien (527-565) de l'Empire byzantin.

• Electronics and Telecommunications Trends
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• v.8 no.1
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• pp.145-151
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• 1993

본 고에서는 현재 ISO/IEC/JTC1 SC6에서 거론되고 있는 새로운 트랜스포트 프로토콜에 대한 일반적인 내용과 그것의 가이드라인에 대하여 알아보았다. 현재 ISO(International Standard Organization)에서는 미국에서 제시하고 있는 XTP(eXpress Transfer Protocol) 와 유럽에서 ESPRIT 과제로 수행하고 있는, OSI '95에서 제시된 TPX, 그리고 벨기에에서 제안한 RTTS, 독일에서 제안한 Modular High-Performance Protocol Family가 있다. 이러한 프로토콜이 서로 장단점을 가지고 있지만 계속 발전하고 있는 하위계층의 요구사항과 매우 다양해져가는 상위계층의 요구사항을 적극 수용하고 있다는데 서로 비슷한 점이 있다. 본 고에서는 새로이 개발해야 될 필요성을 느끼고 있는 트랜스포트 계층의 요구사항과 앞으로 발전해야 할 방향, 그리고 세부적인 구조에 대하여 ISO에서 나온 가이드라인 문서를 중심으로 하여 트랜스포트 계층에서의 가이드라인을 작성하는데 목적이 있다.

• Journal of Navigation and Port Research
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• v.29 no.5 s.101
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• pp.403-408
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• 2005

The techniques of estimating angle of arrival(AOA) have played a key role for enhancement of wireless communications using array antennas. Among those techniques, the superresolution algorithms, such as MUSIC and ESPRIT, calculate the covariance matrix of the array output vectors which are observed at the array antennas, and then by using eigen-decomposition of the covariance matrix, they estimate AOAs of the received signals with high accuracy. However, superresolution algorithms based eigenvalue decomposition fails to estimate AOAs under multipath environments. Under multipath environments, it is difficult to estimate AOAs of the received signals due to coherency and high-correlation. To resolve coherent signals, the covariance matrix is calculated by using the conventional spatial smoothing technique, and then the techniques based on eigen-descomposition is applied. The result of the conventional spatial smoothing technique, however, is obtained at the cost of losing effective spatial aperture. Moreover, the conventional technique ignores any information in the cross-correlations of the array outputs the subarrays. As the result, the performance for AOA estimation is degraded. In this paper, we propose a new spatial smoothing technique, which consider the cross-correlation for subarrays. By computer simulation, the AOA estimation performance of the proposed method is compared with the conventional method and evaluated.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.38 no.6
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• pp.543-551
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• 2020

In this paper, we introduce a method to improve the accuracy of the length estimation of targets using a radar. The HRRP (High Resolution Range Profile) obtained from a received radar signal represents the one-dimensional scattering characteristics of a target, and peaks of the HRRP means the scattering centers that strongly scatter electromagnetic waves. By using the extracted scattering centers, the downrange length of the target, which is the length in the RLOS (Radar Line of Sight), can be estimated, and the real length of the target should be estimated considering the angle between the target and the RLOS. In order to improve the accuracy of the length estimation, parametric estimation methods, which extract scattering centers more exactly than the method using the HRRP, can be used. The parametric estimation method is applied after the number of scattering centers is determined, and is thus greatly affected by the accuracy of the number of scattering centers. In this paper, in order to improve the accuracy of target length estimation, the number of scattering centers is estimated by using AIC (Akaike Information Criteria), MDL (Minimum Descriptive Length), and GLE (Gerschgorin Likelihood Estimators), which are the source number estimation methods based on information theoretic criteria. Using the ESPRIT algorithm as a parameter estimation method, a length estimation simulation was performed for simple target CAD models, and the GLE method represented excellent performance in estimating the number of scattering centers and estimating the target length.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.13 no.1
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• pp.89-93
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• 2013

This paper is estimating a target direction of arrival with incident to receiver in spatial. This paper presented covariance using constraint matrix to correlation interference signal cancellation in multi input multi output array antennas system. we proposed a target direction of arrival estimation algorithm using cost function and minimum variance method. Through simulation, we were analysis a performance to compare general SPT-LCMV algorithm and proposal algorithm. We showed that proposal algorithm improve more target estimation than general SPT-LCMV algorithm in direction of arrival.

• Proceedings of the Korea Electromagnetic Engineering Society Conference
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• 2003.11a
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• pp.193-197
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• 2003

Radar target identification can be achieved by using various radar signatures, such as one-dimensional(1-D) range profile, 2-D radar images, and 1-D or 2-D scattering centers on a target. In this letter, five 1-D scattering center extraction methods are discussed - TLS(Total Least Square)-Prony, Fast Root-MUSIC (Multiple Signal Classification), Matrix-Pencil, GEESE(GEneralized Eigenvalues utilizing Signal-subspace Eigenvalues), TLS-ESPRIT(Total Least Squares - Estimation of Signal Parameters via Rotational Invariance Technique), These methods are compared in the context of estimation accuracy as well as a computational efficiency using a noisy data. Finally these methods are applied to the target classification experiment with the measured data in the POSTECH compact range facility.

• Journal of the Korean Society of Costume
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• v.58 no.6
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• pp.145-157
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• 2008

Vivienne Tam was born in mainland China and educated in Hong Kong and has worked mainly in New York. Within multi-cultural background, she has shown unique fashion designs where western styles and China esprit were harmonized.. This study analyzed the ethnic look featured on Vivienne Tam's design to identify how she has expressed her ethnic identity into fashion. Photos featuring ethnic appeal among her New York collection from 1996 S/S to 2005 F/W were analyzed in terms of shape/silhouette, color, fabric, motifs, detail and accessaries. She utilized frequently chinese motifs and patterns such as bamboo, panda, budha, flowers, letters, and masks. Secondly she modified the shapes of Chinese traditional costume like Quipao to render ethnic appeal. Color, fabric and detail like frog and embroidery also contributed to enhance China mood. Comparatively, she used western clothing items including shirts, blouses, skirts, pants, dresses, and coats and maintained the silhouette tight and fit so that most her designs look wearable and westernized.

• Journal of the Korean Society for Precision Engineering
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• v.31 no.5
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• pp.403-409
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• 2014

For ground-based telescope application, the performance assessment of tip-tilt actuator is important because the optical quality of telescope depends upon the windshake compensation ability of the fast steering secondary mirror. But it is difficult to measure the performance characteristics of the actuators due to the large size mirror and test facilities including the vacuum support and structural frame. In this paper, the full-scale tip-tilt test bed for the large size secondary mirror with diameter of 1m is built and the several tests are performed including the range, resolution and frequency response function. From the measurement results, it is shown that the tip-tilt actuator can successfully compensate the windshake with frequency of maximum 12 Hz and be a candidate for the Giant Magellan Telescope.