• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.1506-1507
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• 2007

For GPR applications, accurate analysis of the scatterered field is necessary to identify the unknown target. Dyadic Green's Function of the multilayered medium is developed and applied to analyse of underground conduting object. We used method of moment(MOM) with dyadic Green's function, and Discrete Complex Image Method(DCIM).

• The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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• v.6 no.4
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• pp.225-233
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• 2001

In order to find out the role of sea-ice in the climate system, a thermodynamic sea-ice model has been developed and included in the ocean general circulation model, MOM2, for the construction of OGCM/sea-ice coupled model in this study. By using the model developed, seasonal mean sea-ice distribution has been simulated, first of all. The role of sea-ice in the sense of large scale ocean circulation has been studied by comparing the results of OGCM/sea-ice coupled model experiment with OGCM-standalone experiment. At the same time, the coupled model has been verified by comparing and analysing the results of the other models and observation. The coupled model has reasonably simulated the overall seasonal distribution of sea-ice in the high latitudes of both hemispheres. In the comparative analysis between the OGCM/sea-ice coupled and OGCM-standalone experiments, the sea-ice is playing important roles on maintaining not only the distributions of temperature and salinity in high latitudes of both hemispheres, but also the meridional ocean circulation associated with south ocean cell, southern hemisphere cell and zonal ocean circulation such as a circum-polar current.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.25 no.5
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• pp.576-584
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• 2014

In this paper, a study on the optimization of fuzzy classifier using radar cross section(RCS) values is presented to classify shell-shaped targets. Method of moments(MOM) is exploited to construct RCS database of generic shell-shaped targets in uniform angular intervals. Relative orientations are estimated from various flight scenarios of shell-shaped targets, and associated RCS values are interpolated from the generated RCS database with uniform angular intervals. Initial membership functions are determined using the interpolated RCS values, and particle swarm optimization(PSO) is utilized to optimize the membership functions of the fuzzy classifier in terms of probability of correct classification.

• The Journal of the Korea Contents Association
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• v.12 no.3
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• pp.17-24
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• 2012

Andre Bazin called the movie frame as "the window open to the world." This expression is close to realization through 3D films. The 'Avatar' released in 2009 was a new turning point for 3D films. Nowadays the theory and information about 3D films is overflowed. It is necessary to find practices and to accumulate data useful in production of 3D films. There are several ways of working to achieve high quality 3D films. In any way that's chosen, there are priorities to be considered to create well-balanced 3D films. The aim of this article is to review primary considerations in film-making and share the technical issues experienced during the production of "Let's go to the amusement park again, Mom." Because the current practical knowledge in making 3D film is shallow, this article will offer a possible reference for further research.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.14 no.8
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• pp.830-838
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• 2003

In this paper, TX/RX dual operation microstrip single antenna for satellite communication is designed, analyzed, fabricated and measured. TX/RX frequency ranges are 14.0∼l4.5 GHz, 11.7∼12.75 GHz in respectively and vertical and horizontal polarizations are used for TX and RX. This antenna uses microstrip direct feeding for RX and aperture coupled strip-line feeding for TX and accommodates stacked elements for a high directivity and wide impedance bandwidth. In an analysis of single element, FDTD and MOM was compared and FDTD analysis was more accurate because of the consideration of finite structure and imperfect two ground planes. The proposed structure facilitates generally to an extension of two dimensional array and lower an unwanted radiation by strip-line feed in TX. TX/RX 8${\times}$4 array has a return loss below -10 dB, -14 dB in TX, RX respectively and a gain ranging from 19.1∼20.7 dB in TX, 21.2∼21.8 dB in RX which has a radiation efficiency of 43∼5l %, 52∼57 %.

• Journal of Korea Water Resources Association
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• v.41 no.5
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• pp.527-544
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• 2008

Generalized Pareto distribution (GPD) is frequently applied in hydrologic extreme value analysis. The main objective of statistics of extremes is the prediction of rare events, and the primary problem has been the estimation of the threshold and the exceedances which were difficult without an accurate method of calculation. In this paper, to obtain the threshold or the exceedances, four methods were considered. For this comparison a GPD model was used to estimate parameters and quantiles for the seven durations (1, 2, 3, 6, 12, 18 and 24 hours) and the ten return periods (2, 3, 5, 10, 20, 30, 50, 70, 80 and 100 years). The parameters and quantiles of the three-parameter generalized Pareto distribution were estimated with three methods (MOM, ML and PWM). To estimate the degree of fit, three methods (K-S, CVM and A-D test) were performed and the relative root mean squared error (RRMSE) was calculated for a Monte Carlo generated sample. Then the performance of these methods were compared with the objective of identifying the best method from their number.

• Journal of the Korea Convergence Society
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• v.10 no.11
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• pp.253-262
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• 2019

This study conducted an actual condition survey with users in order to examine the Graphic User Interface (GUI) design appearing in fast food Digital Information Display (DID). Selecting four restaurants with high sales in the hamburger industry in 2017, including Lotteria, McDonald's, Burger King, and Mom's Touch, based on this, this study investigated and analyzed GUI visual components appearing in DID, including layout, character, color, graphics, and videos based on this. As a result, this study could propose a design plan providing users with the layout that can be clearly and neatly divided, characters attracting attention with high readability, colors with high visibility, graphics attract interest, and videos with various contents, rather than a complex approach for efficient GUI design, analyzing the environmental factors of fast food restaurants.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.23 no.5
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• pp.1342-1348
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• 1998

The major limitation of MOM solution has alaways been the computer CPU time and storage size, needed to carry out the impedance matrix computation. A new formulation technique using Sorce Superimposion method is presented in order to cut down computerstorage requirements and CPU time based on the equivalence principle and induction theorem. The numerical results are shown to give good agreement to those calculated by the conventional method and also application example is presented.

• Proceedings of the KAIS Fall Conference
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• 2007.05a
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• pp.283-286
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• 2007

현재까지 이수관리를 목적으로 저수지 또는 저수지군의 최적(연계)운영모형 개발에 관한 연구들을 다수 수행한 바 있는데 그 예를 들면, 한강, 금강, 낙동강 수계에서 Hydro-scheduling 모형과 CoMOM(Coordinated Multi- reservoir Operating Model for Han River Basin)을 적용하였고 특히 낙동강 수계에 대해서는 저수관리시스템을 개발하여 적용하였다. 그러나 이러한 적용 사례에도 불구하고 이수 물관리의 근간이 되는 수계 저수유출을 모의할 수 있는 모형은 정립되어 있지 못한 실정이다. 본 연구에서는 수계별 한정된 수자원의 효율적 관리를 위한 기존댐의 연계운영과 병행하여 댐 상 ${\cdot}$ 하류 유출을 고려한 종합적인 수자원관리방안 수립의 필요성이 대두됨에 따라, 저수기 램 상 ${\cdot}$ 하류의 수계 주요지점에 대한 하천유출상황을 모의할 수 있는 모형을 개발하였다.

• Nutritional Sciences
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• v.8 no.2
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• pp.140-147
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• 2005

In order to promote foodservice for older adults, foodservice directors in Continuing Care Retirement Communities (CCRCs) must identify the dimensions used by residents to evaluate the service quality of dining service. A multidimensional measure of perceived service quality was developed based on residents' responses about their experiences with dining service. A survey was administered to residents in two CCRCs. Based on the results of principal component analysis, this study identified four dimensions: food quality, dining room employee's attitude and service skills, dining room employee's safety and cleanliness, and systemization of service delivery process. A new dimension that reflects residents' concern for the dining mom employees' safety and cleanliness also emerged. 1bis study points to areas of improvement for food quality and dining room employee's safety and cleanliness.