• 한국산학기술학회논문지
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• 제8권6호
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• pp.1505-1512
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• 2007

유비쿼터스 환경을 구성하는 핵심기술 중 하나인 RFID 기술은 각종 물품에 소형 칩을 부착해 사물의 정보와 주변 환경정보를 무선주파수로 전송 처리하는 비접촉식 인식시스템이다. 현재 RFID 기술은 미들웨어 및 무선 인터페이스 등에 대한 연구가 진행되고 있으며, 또한 물류 및 유통 등의 분야를 비롯한 다양한 응용 분야에 RFID 시스템을 개발하고 있다. 본 논문에서는 지역이나 시설에 대한 보안 및 안전을 위하여 RFID 미들웨어 기반의 출입문 제어 시스템을 설계하고 구현한다. 이를 위하여 RFID EPC 코드에 의한 사용자의 출입을 인증하기 위한 알고리즘을 제시하고, RFID 기반의 사용자 인증 모듈, 다수의 출입문을 개폐하는 제어 모듈, 출입문의 상태 관리 모듈, 출입 여부도시 모듈, 테스트용 프로그램 등을 구현한다.

• 전기학회논문지
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• 제58권3호
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• pp.627-631
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• 2009

This paper presents a novel current steering cell matrix DAC(digital-to-analog converter) architecture to reduce decoder area. The current cell matrix of a existing architecture is selected by columns and lows thermometer code decoder of input bits. But The current cell matrix of a proposal architecture is divided 2n by the thermometer code decoder of upper input bits and are selected by the thermometer code decoder of middle and lower input bits. Because of this configuration, decoder numbers have increased. But the gate number that composed of decoder has decreased. In case of the designed 8 bit current steering cell matrix DAC, the gate number of decoder has decreased by about 55% in comparison with a existing architecture.

• 대한한의진단학회지
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• 제25권1호
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• pp.1-71
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• 2021

Objectives In order to reinterpret the meaning of Inch-Bar-Cubit used by pulse diagnosis, this study investigates floating pulses of lung and heart in the Inch area, middle pulse of spleen and livers in the Bar area, and deep pulse of kidney and life gate in the Cubit area. However, some suggested that the meaning of Inch-Bar-Cubit should be interpreted in the same way as floating-middle-deep. Methods In this study, the contents of Inch-Bar-Cubit assignment of pulse diagnosis proposed by Dongeuibogam and Medical Scientist were investigated along with the existing investigation of pulse diagnosis, and their interpretation was investigated. Result and conclusion The assignment of books in Pulse diagnosis can be applied by replacing them with floating-middle-deep instead of Inch-Bar-Cubit.

• 건축역사연구
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• 제1권2호
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• pp.68-84
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• 1992

The development of Buddhist architectures of the Unified Silla period have been generally understood to have paired pagoda instead of one which had been popular until before the unification. Besides the stylistic categorization of paired pagoda system, there had been no further investigation reported concerning whether there was any detailed process of change within the development of paired pagoda style. This paper aims to identify such change inside the development of paired pagoda style, which, externally, seems to be the same pattern of site design maintained throughout the period of Unified Silla that lasted for about three centuries. Since the temple sites of study are in the same pattern of layout, the method of investigation has to be such that can identify the subtle changes that, in external appearance, are not easily discernible. Hence, this research compared the dimensions of important measurement of five temple sites to be able to clarify the process of minor changes. Among many sites of Silla temples, only five were suitable for the research since detailed measurement were possible through field research or the report of excavation. They are the sites of Sachonwang-sa, Mangduk-sa, site of Kunsuri, and Bulguk-sa. Although the five sites have the same style of paired pagoda, it is clear that there were consistant flow of change. Even though the motivation of such change were not strong enough to change the site pattern itself, it resulted continuous minor changes such as the size and location of architectures. The size of image hall, for example, was growing larger and larger as time goes on, while, the size of Pagoda was getting smaller. In the same way, the size of middle gate became smaller while the size of lecture hall became larger, although the rate of change in these cases were not as severe as that of image hall and pagoda. At the same time, pagoda was coming closer to the middle gate leaving larger space in front of the image hall. Such aspect is even more meaningful considering the fact that the pagoda, from the 8th century in Japan and China, moved outside of the major precinct. The image hall, too, moved toward the middle gate slightly so that the space in front of the lecture hall became more spacious. Such changes, of course, were not accidental but they are the same continuous motivation of change that caused the changes before the period of unification. Enlargement of image hall and reduction of pagoda, for example, represent the changing relative importance of religious meaning. Hence, it is evident that one can not easily imterprete the development of one style only by categorizing it to be one same style. In the veiwpoint of the underlying motivation of change, the fact that one style persisted for a certain period of time, does not mean there had been no change, but means that it was the time of motivational accumulation, causing minor changes within the same style, to be able to create major change coming after.

• 건축역사연구
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• 제30권6호
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• pp.71-80
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• 2021

This study tries to shed light on character and architectural features of the 2nd construction of Bunhwangsa temple in the mid-8th century. The site of Bunhwangsa Temple is divided into upper and lower areas based on retaining walls running from northwest to southeast, and the main area of the temple centered on Geumdang(the main hall) is located in the upper area. Space composition of the lower area including Wonji(a garden pond) and Gangdang(a lecture hall), is noteworthy in that Bunhwangsa Temple was constructed in a deviating way from rigorous constructional disciplines and used their space efficiently. The Geumdang in the 2nd construction was the largest worship hall with 7×6 bays. The hall was designed to divide its space into two ; the core space was surrounded by outer space. Each gap between columns in the hall was narrowed from center to outer. The main construction of the Geumdang was built as a stable structure with lead-to corridors. This was a much-advanced style than Geumdang at Hwangnyongsa Temple. The Gangdang is presumed to be a large building site as a typical Gangdang style in the Silla era. It was built in the late 9th century and was located in the northern part of the retaining walls. The composition of the middle gate and southern corridors were in double and long corridor style and they were located in front of the 2nd construction. This style coincided in the form of the architectural style of the Hwangnongsa Temple. The 2nd construction of the Bunhwangsa Temple was smaller than the Hwangnongsa Temple. However, it was a prestigious architecture.

• 건축역사연구
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• 제10권2호
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• pp.21-34
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• 2001

The purpose of this study is that it is made clear the construction method of Japanese Castle Architecture in Korea as I study the construction method of Suncheon-Japanese Castle(順天倭城) in those days of Jeong-yu Japanese Invasion. Moreover, I intend to analyze the similarity and the difference between Suncheon-Japanese Castle and Korean Castle Architecture by a comparative study. The result of the study is showed that Suncheon-Japanese Castle seemed to be built with the object of a long time stay rather than it was of strategic importance for the national defense. In addition, it was different from other Japanese Castle in Korea because the watch tower(天守閣) of it stood in the middle of stronghold and the watch tower stronghold dividing the round of it while that of it stood the comer of stronghold. The face stone used in important part of watch tower, gate, and so on was mostly a trimed hexangular stone. On the other hand, the face abbuting on the Gulf of kwang-yang was made of naturally wild face stone. The stone cleared traces of Si-hyeol(矢穴) and domestic Castle in Japan was also made of this method after Im-Jin Japanese Invasion. According to the construction method, the wall of castle made use of the Netak(內托) method except the gate, the support stronghold and the watch. The early mountain castle in Korea have this construction method in common.

• 건축역사연구
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• 제27권2호
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• pp.79-88
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• 2018

Foreign Reception Hall in Gyeongungung Palace was constructed during 1899-1902 according to Yesigjangjeong (禮式章程), Korean Empire's modern diplomatic protocol. This bulilding is a case worthy of notice, because its construction process was written in Jubon(奏本), Korean Empire's official document. Yesigjangjeong(禮式章程) regulates the process of diplomat's audience with Emperor Gojong. The process suggested that Foreign Reception Hall was designed as the place of the end as well as the beginning for audience. According to the process, diplomat came through main gate, Daehanmun and outer gate of main hall(Junghwajeon Hall, Audience Hall), then arrived at the stair to Foreign Reception Hall. After waiting time in the hall, he was going to be granted an audience with Emperor. And he exited through Foreign Reception Hall as the reverse way. This hall was constructed as western-style. Subcontracted carpenters and wood sculptors and laborers from China represents that chinese workers were prevailed in the government construction at that time. And modern building materials, such as glass, colored brick, sanitary wares and lightings were applied, which showed the new landscape in the middle of Gyeongungung Palace. Above all, official documents related with this hall reveals Korean Empire supervised this construction for diplomatic protocol. That is the identity of western-style buildings in Gyeongungung Palace.

• International Journal of Contents
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• 제13권4호
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• pp.63-69
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• 2017

The objective of this study was to investigate factors that could bring about successful implementation of extensive reading using online/offline blended English library system called 'Reading Gate' in primary and secondary schools. Although there are a great number of studies on effects of various extensive reading on linguistic, cognitive, and affective development, few studies have investigated how extensive reading programs can be implemented at large scale, e.g., whole school level. After analyzing students' reading levels in 200 schools using the same online extensive reading program called Reading Gate, results showed that while some schools were successful, others were not. Five primary and 13 middle schools were selected as successful schools. Data on implementation of the program of schools was gathered. Eighteen teachers and seven headteachers took part in the interview. After analyzing these data on the implementation of the extensive reading program, results revealed that the following five factors for successful implementation of blended extensive reading programs: online level-up system, teacher intervention, integration with the curriculum, school-level support, and parents' awareness of literacy. This suggests that each factor might have contributed to the successful implementation of the extensive reading program at large scale. Implications and applications of this finding are discussed in this study.

• JSTS:Journal of Semiconductor Technology and Science
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• 제10권3호
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• pp.240-250
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• 2010

Double Gate MOSFETs (DG MOSFETs) with doping in one or two thin layers of an otherwise intrinsic channel are simulated to obtain the transport characteristics, threshold voltage and leakage current. Two different device structures- one with doping on two layers near the top and bottom oxide layers and another with doping on a single layer at the centre- are simulated and the variation of device parameters with a change in doping concentration and doping layer thickness is studied. It is observed that an n-doped layer in the channel reduces the threshold voltage and increases the drive current, when compared with a device of undoped channel. The reduction in the threshold voltage and increase in the drain current are found to increase with the thickness and the level of doping of the layer. The leakage current is larger than that of an undoped channel, but less than that of a uniformly doped channel. For a channel with p-doped layer, the threshold voltage increases with the level of doping and the thickness of the layer, accompanied with a reduction in drain current. The devices with doped middle layers and doped gate layers show almost identical behavior, apart from the slight difference in the drive current. The doping level and the thickness of the layers can be used as a tool to adjust the threshold voltage of the device indicating the possibility of easy fabrication of ICs having FETs of different threshold voltages, and the rest of the channel, being intrinsic having high mobility, serves to maintain high drive current in comparison with a fully doped channel.

• 대한미생물학회지
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• 제11권1호
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• pp.69-78
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• 1976

There have been increasing reports of mycobacterioses in man and animals caused by "atypical" or "opportunist" mycobacteria. At the presnt, "opportunist mycobacterioses" are not generally responsive to antituberculosis drugs, and therefore, create considerable problems with regard to chemotherapy and control measures. In recent years studies have been made to isolate opportunist mycobacteria from soil, house-dusts and tap-water. It seemed quite interesting to define the extent of circumstantial presence of "opportunist" mycobacteria and nocardia in the soils of school-ground of primary schools and middle-high schools. This communication is the results of pilot study to isolate and identify "opportunist" mycobacteria and nocardia from 504 soil specimens of 72 schools in Seoul City. 1. Of a total of 59 isolates from 504 soil specimens tested, 32 strains were identified as opportunist mycobacteria and 27 strains as nocardia. 2. Isolation rates of opportunist mycobacteria by the areas(of specimen collection) were as follows: 36.4% in the southern area of Han-River, 33.3% in the central area, 22.7% in the outskirt area and 16.6% in the intermediate area. There observed no apparent difference in the isolation rates both-between the areas and between primary schools and middle-high schools. However, a significant difference was noted in the isolation rates between the places of soil sampling in a given school(P<0.05), i.e., the highest was the soil of refuge heaps(15.2%), and tap-water pole area(11.1%), the school-lavatory entrance(9.7%), the school gate entrance(5.5%), and iron-bar play ground(2.7%). The soil specimens from the center of school ground and from school building entrance yielded none of mycobacterial isolates. 3. Isolation rates of nocardia by the areas were as follows: 33.3% in the central area, 31.8% in the outskirt area, 27.3% in the southern ares of Han-River and 11.1% in the intermediate area. As in the case of mycobacteral isolates, there observed no apparent differences in the isolation rates both between the areas and between primary schools and middle-high schools, but a significant difference was noted between the places of soil sampling(P<0.05), i.e., the highest was the soil of school building entrance(15.2%), and of school gate entrance(6.9%), refuge heaps(5.5,%), iron-bar play ground(4.1%), the school-lavatory entrance(2.7%) and tap-water pole area(2.7%), respectively. The soil specimens from the center of, school ground yielded none of nocardia isolates. 4. Of the 32 strains of isolated mycobacteria. 15 strains were slow-growing mycobacteria and the remaining 17 strains belonged to the rapid growers. Of the 15 slow-growers. 4 strains were M. scrofulaceum-szulgai complex, 3 M. gordonae, 4 M. terrae-triviale complex, 2 M. avium-intracellulare-xenopi complex, and 2 unclassified schotochromogens. Of the 17 strains of rapid growers, 12 were M. diernhoferi, 2 M. fortuitum-peregrinum complex, 2 M. vaccae and one M. flavescens. 5. Of the 27 strains of nocardia isolated, 11 strains were N. transvalensis, 5 N. convoluta, 5 N. erythropolis, one N. vaccinii, one N. polychromogens-paraffinae complex and 4 untypable strains of orange-pigmented nocardia spp.