• The Transactions of the Korean Institute of Electrical Engineers C
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• v.53 no.5
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• pp.279-285
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• 2004

In this paper, low noise amplifier(LNA), aperture coupled patch antenna and $4{\times}4$ array antenna are designed in the frequency range from 11.7㎓ to 12㎓. Array antennas with and without LNA at the antenna element are fabricated and the performances are measured including noise figure(NF). The noise figure calculation for overall system was conducted and compared with the measured data to verify our measurement method. The measured overall noise figure of the array antenna with LNA at the antenna element is lower than that of array without LNA as expected.

• Journal of Elementary Mathematics Education in Korea
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• v.15 no.3
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• pp.509-531
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• 2011

This study is to determine if teaching of measuring the area of plane figures in elementary school is successful. While they teach to measure the area of figures in elementary school, students don't measure the segment of the figure directly until now. The figures are presented with auxiliary line and numerical information. When students measure the area of such figure, they do only substitute the number and calculate it. This study found that such teaching is not successful and propose the new teaching method of measuring the plane figures.

• 한국정보통신설비학회:학술대회논문집
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• 2008.08a
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• pp.35-38
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• 2008

In this paper, study noise performance of LNA to enhance Q-factor of input circuit by patterned ground shield is inserted inductor using TSMC 0.18um. Applied LNA technology is cascode method. The input matching circuit was constituted on-chip and wirebonding inductor. Taguchi's method is used for the best suited structure of PGS. We confirmed enhancement of Q-factor by inserted PGS into inductor. The input matching circuit enhanced Q-factor by inductor with PGS improve noise figure of LNA.

• Journal of the Korean Institute of Landscape Architecture
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• v.22 no.1
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• pp.111-119
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• 1994

Until now, Many studies on the traditional landscape architecture were approached to the interpretation of meanings and symbolism in terms of the traditional ideology and the view of nature. The purpose of this study was to research the principle of form included in the space planning by the analysis of the drawing figure. The principes of figure were presented in the space planning as the field of art. In the pavillion and square pond, drawing figure, based on the principle of simple proportions, shall be assured the value of being as a role of functions for planning first of all. Such principles of the functional aspect are in hormony and balance by proportion and thus a visual and structural aesthetic will be abled to refer.

• Korean Journal of Applied Biomechanics
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• v.17 no.3
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• pp.165-172
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• 2007

The purpose of this study was to examine the effects of the result of hardship performance of the propulsion speed on the flying carmel spins during a Figure Skating. The subjects were five the korea national representative players. Kinematic variables were analyzed 5frame of the excursion phase by the three-dimensional motion analysis system(60Hz). The obtained conclusion were as follows: In this study, during the propulsion classify two groups as "type I" the acceleration patterns S3, S4 and "type II" the uniform velocity group S1, S2, S5. The results of percentage comparative analysis between type I and type II can be summarized as below: the height of jump(24%), the height of COM(25%), the maximum speed of Roundhouse Kick(21%), the judging technical score(18%), the flight time(13%), the velocity of spins(4%), the distance of flight(-6%) Analysis of the results on performance variables, the velocity pattern of the type I showed comparatively excellence than that of type II.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.54 no.6
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• pp.1036-1044
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• 2021

A linear array acoustic transducer with 12 tonpilz elements mounted independently on a gradual wedge-shaped tail mass was fabricated, tested and analyzed. The compensated transducer, which is modified by including a series inductance of 137 µH in the developed linear array transducer, attained improved figure of merit (FOM) performance characteristics compared with the uncompensated transducer. The four resonant frequency bands were identified from the measured FOM curve. The FOM response patterns over the frequency ranges of 31 to 40 kHz and 50 to 60 kHz were relatively uniform, whereas sharp resonance peaks were observed at around 73 kHz and 84 kHz. These results indicate that the developed linear array transducer can be used as an enhanced broadband transducer of echo sounder, and the operating frequency can be selected for more effective echo surveys in the fishing ground.

• Journal of architectural history
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• v.30 no.4
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• pp.17-29
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• 2021

Young-dang(影堂) is a ritual pavilion where figures of a dedicated person is enshrined. According to literature, establishment of Young-dang architecture is thought to have the affinity with Buddhist tradition in the beginning of its history. A tradition of enshrining figure could be found especially in Buddhism. Until the mid Joseon dynasty, enshrining figure made of wood, clay and bronze was quite often at Young-dang. In Confucian ritual tradition, a pavilion where enshrining ancestor's sprit tablet called Sadang(祠堂) or Myo(廟). In regarding portrait is a sort of figure, it has to be concerned with Buddhist ritual tradition. For this reaseon, Young-dang started to be distinguished from older aspect of existence in mid Joseon dynasty when the study of Confucian courtesy widely spread. It show the transformation process of Young-dang architecture from Buddhist tradition to Confucian tradition in J oseon dynasty.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2021.05a
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• pp.213-214
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• 2021

External insulation method is used to conserve energy of buildings. However, the current external insulation method uses organic insulating materials to become a diffusion path in case of fire. In this study, the purpose of this study is to provide basic data on the required performance of the plastering material according to the CaCO₃ powder addition of the finishing material of the external insulation method. In Figure 1, when powder was added, the adhesion strength decreased by 30% to 35% at 10% and 0% to 50% at 20% compared to Plain. In Figure 2, the moisture permeability increases approximately twice when powder is added. The results for the water absorption coefficient are shown in Figure 3.

• International Journal of Advanced Culture Technology
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• v.12 no.1
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• pp.128-133
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• 2024

Painting, as an artistic creation with aesthetic characteristics, is inseparable from "shape". "Modeling" is a subjective way of expressing objects, and "black shape" is not only a way of expression, but also a way of composition. "Black shape" is a way of expressing the overall picture of the creator, and "black shape" extracted from the pattern analysis of black and white gray structure is a powerful means to deeply explore the emotions and thoughts of the painter. How to create the expression of subjective intention in the creation of artificial figure painting and to explore the beauty of picture form and the presentation of formal language in multiple dimensions is always sought by painters. Tang Dynasty political stability, economic and cultural development of unprecedented prosperity, "Toujian Diu" as a representative painting of Tang Dynasty, the figure is plump and realistic, colorful but elegant. It not only represents the aesthetic taste of the Tang Dynasty, but also reflects the overall style of the Tang Dynasty's artificial figure painting. The aim of this paper is to explore the value of "black shape" in "Toughen Diagram" and analyze its multi-component form in depth.

• Journal of architectural history
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• v.14 no.3 s.43
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• pp.129-148
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• 2005

The plan type of Korean protestant church architecture underwent changes as following five stages according to the changes of the distinction between the sexes. First stage - At the beginning of missionary work in Korea, Koreans generally worshiped in missionary houses which were traditional Korean styles. The plan type of these houses was a simple '-' figure. At that time, men and women worshiped separately because of the idea of the distinction between the sexes. They either worshiped in different places at the same time or in the same place at the different time. Second stage - At this stage, men and women started to worship together in the same place. At the beginning of this stage, men sat in the front of the chapel on a rostrum, and women sat behind the men. The plan type of the chapel was a simple '-' or a rectangular figure. Later, they sat separately on the right and left side. There are the visual interceptions which were set up between them. As the number of church members increased rapidly, a new type of church architecture appeared. It was a 'ㄱ' figure. At that time the entrances were separated by the sexes. Third stage - At this stage, the visual interceptions disappeared as the idea of the distinction between the sexes became weak. As new churches had been constructed by the plan type of rectangular figure, the visual interceptions weren't set up anymore. Fourth stage - At this stage, the separated entrances were unified as one. But the arrangement of their seats didn't change because of the old idea of the distinction between the sexes. Fifth stage - In the final stage, the plan type of the church architecture was not determined by the idea of the distinction between the sexes but social, economical, technological facts and the influence of the foreign architecture. At this stage, new and various kinds of the plan type appeared such as the fan, round, squared, or oval figure as well as the rectangular figure. Men and women were not classified anymore. They started to sit and worship together in the same place. Also, when men and women sat separately from side to side because of the Idea of the distinction between the sexes, men sat on the right and women sat on the left side of rostrum. It didn't applied Confucian ideas but the idea of protestant church; protestant churches have the idea that the right side is more important but it does not in Confucianism.