무인계산 게이트용 UHF대역의 RFID 라벨태그 안테나에 관한 연구

이재용,심용석,양진모 대구대학교 정보통신연구소 2010 情報通信硏究 Vol.7 No.1

In this paper, we presented a specific UHF RFID label-type tag antenna for unattended payment gateway system to avoid null point by improving radiation patterns and directivity. The proposed antenna was constructed with form of microstrip line on a thin PET substrate for low-cost fabrication. We built some sample antennas and measured the antenna characteristics such as return loss, radiation patterns, and read range. The operating frequency of the tag antenna is 0.7-1.06GHz under -3dB(VSWR<2) return loss. The average readable range of the tag with a conventional RFID reader is 3.75m and the maximum readable range at an echoic chamber is about 5.68 to 6 m. 본 논문에서는 방사 패턴과 방향성을 향상시켜 널 구역을 제거한 무인 계산 게이트 시스템용 UHF RFID 라벨형 태그 안테나를 제안하였다. 제안된 안테나는 PET 기판에 쉽게 인쇄할 수 있어 제조 단가 절감을 통해 대량 생산이 용이하다. 최적화된 RFID 태그 안테나의 표본 안테나를 제작하고 반사손실, 방사패턴, 인식거리 등을 측정하였다. 태그 안테나의 동작 주파수는 반사손실 -3dB(VSWR<2) 기준으로 0.7-1.06 GHz이며, 고정용 리더시스템을 이용한 태그의 평균 인식거리는 3.75m, 무반사실에서의 최대 인식거리는 5.68-6m였다.

집적회로 설계적 기법을 이용한 고전압 인버터 설계

양진모,심용석 대구대학교 과학기술연구소 1997 科學技術硏究 Vol.4 No.3

As the size of MOSFET becomes small due to recent advancements in integrated circuit fabrication technology, operating voltage goes low, typically 3.3∼5[V], by the limitation of semiconductor physics. However, high output-voltage is needed in several applications such as LCD of notebook computers, automobiles, communication systems, CD-ROM drivers, and medical instruments. There are several methods to obtain high-voltage integrated circuits. One is using a high voltage fabrication process and another is using a modified low voltage process which supports high voltage MOSFETs obtained by changing the geometry of low-voltage transistors. Since the above methods use non-standard fabrication techniques, the manufacturing cost goes high and the signal integrity might become hazardous. This paper, therefore, proposes a new design technique that enables the design of high-voltage inverter using only standard low-voltage MOSFETs. Circuits designed by this method, therefore, can be produced in a standard CMOS process and no additional production cost is required. The proposed method adds a kind of safety circuitry to the low-voltage transistors making up high-voltage circuits in such a way that all the transistors in the circuits operate within a given safe operating voltage. This paper discusses how to design the safety circuit and shows the validity of this design method through a design example using a circuit simulation program, SmartSpice. In order to convert a low-voltage signal to the high-voltage signal which is demanded in high-voltage circuits, a new level shifter architecture is proposed also. The simulation results shows the high-voltage output driver will be safely operating under many severe input and power supply conditions.

모바일 전자정부(m정부)의 구현 방안에 관한 연구

이진복,박순용 건국대학교 사회정책연구소 2003 사회과학연구 Vol.16 No.-

RF용 MOSFET를 위한 BSIM3v3 모델의 I-V 파라메터 최적화

심용석,강학진,양진모 대구대학교 정보통신연구소 2003 情報通信硏究 Vol.1 No.2

본 논문에서는 고주파 영역에서 정확한 동작을 예측하는 MOSFET 모델에서 핵심 역할을 하고 있는 BSIM3v3 모델의 정확한 대신호 전류-전압 특성을 위한 직류 모델 파라미터의 최적화 방법을 제안하였다. BSIM3v3의 직류 모델 파라미터는 변화가 허용되는 범위 내에서 측정된 직류 전류-전압 곡선과의 일치로 추출하였다. 또한 MOSFET의 다양한 크기에서 파라미터의 최적화를 수행하여 그 평균값을 취함으로써, 트랜지스터의 크기에 무관한 파라미터를 추출하였다. This paper proposes a DC parameter optimization method that finds the most appropriate DC paramtcr set of BSIM3v3 model accurately represent DC I-V characteristics of MOSFET devices in the giga frequency ranges. The DC I-V characteristics of BSIM3v3 model was varied by changing the DC parameter set (XL, XW, TOX, RSH, DELVTO) in order to fit the measured DC characteristics of various sized RF MOSFETs. The value of the DC parameter set was obtained by averaging the result of optimized values for various sized MOSFETs.

RF-MOSFET의 개선된 BSIM3 소신호 모델과 측정기반 파라미터 추출

심용석,김정보,양진모 대구대학교 정보통신연구소 2004 情報通信硏究 Vol.3 No.1

RF 영역에서 동작하는 초미세 MOSFET를 위한 새로운 소신호 모델과 파라미터 추출방법을 제안하였다. 이 모델은 BSIM3v3 코어에 기판 회로망 모델과 기생소자들이 추가된 매크로 모델로 구현되었다. 모델 파라미터들은 공통-소오스로 구성된 다양한 크기와 바이어스 조건하에서 nMOS 트랜지스터의 측정된 S-파라미터로부터 직접 추출되었다. 직접 파라미터 추출은 활성영역에서 동작하는 등가회로에서 Z와 Y 파라미터를 이용하여 임베이딩 기법으로 이루어 졌다. 0.5 GHz에서 20 GHz 범위까지 측정된 S-파라미터와 소신호 모델의 시뮬레이션 결과는 우수하게 일치하였다. A new small-signal model for deep submicrometre MOSFET for radio frequency operation and its parameter extraction method are proposed. The model is implemented as macromodel with substrate network model and parasitic elements added to the BSIM3v3 core. Model parameters are directly extracted from S-parameter data measured from common-source structured and various sized and biased MOS transistors . Direct parameter extraction is performed by embedding technique using Z and Y parameter analysis on the equivalent circuit in the saturation region of operation. Excellent agreement between the simulation results of the small-signal model and measured S-parameters at virious-sized MOS transistor in the range from 0.5 GHz to 20 GHz has been obtained.

CMOS RFIC 설계를 위한 MOSFET 모델링과 파라미터 추출 방법

심용석,한기원,양진모 대구대학교 정보통신연구소 2003 情報通信硏究 Vol.2 No.1

고주파수 영역에서 동작하는 초미세 MOSFET를 위한 새로운 소신호 모델과 파라미터 추출방법을 제안되었다. 이 모델은 BSIM3v3 코어에 기판회로망 모델과 기생소자들이 추가된 매크로 모델로 구현되었다 모델 파라미터들은 공통-소오스로 구성된 다양한 크기의 nMOS 트랜지스터의 측정된 S-파라미터로부터 직접 추출된다. 직접 추출은 활성영역에서 동작하는 등가회로에서 Z와 Y 파라미터를 이용하였다. 0.5 ㎓에서 20 ㎓ 범위까지 측정된 S-파라미터와 소신호 모델의 시뮬레이션 결과는 우수하게 일치하였다. A new small-signal model for deep submicrometre MOSFET for high frequency operation and its parameter extraction method are proposed. The model is implemented as macromodel with substrate network model and parasitic elements added to the BSIM3v3 core. Model parameters are directly extracted from S-parameter data measured from common-source structured and various sized nMOS transistors. Direct extraction is performed by Z and Y parameter analysis on the equivalent circuit in the saturation region of operation. Excellent agreement between the simulation results of the small-signal model and measured S-parameters at vinous-sized MOS transistor in the range from 0.5 GHz to 20 GHz has been obtained.

<어벤져스>에 나타난 미국적 이데올로기의 양상들

최영진 ( Yong Jeen Choe ),유준석 ( Jun Seok Yoo ) 한국비교문학회 2014 比較文學 Vol.0 No.62

This article aims to discuss how the ideological implications are embedded in American superheroes by analyzing the narrative of The Avengers (2012), one of superhero films adapted from the Marvel Comics book with the same title. Especially, it focuses on how the ideological aspects of superhero characters in the film show difference from the actual ideological effects of our life. In this film, the state ideology is represented by the World Security Council and its division S.H.I.E.L.D., while the individual ideological aspects are reflected in the superhero characters. These two ideological values can be understood as two poles of traditional American myth which typically features the thematic paradigm of the Classical Hollywood films, that is, the conflict and reconciliation between outlaw hero and official hero. This arguing point leads to discussion of the ideological effect of the film, which functions as reappropriating two seemingly incompatible values of the individual and the state into what we can call American ideology. Through the detailed analysis of the superhero characters and Nick Fury (director of S.H.I.E.L.D.), the article reaches the final arguing point that the ambivalence of American ideology can covertly interpellate the audience through the detour of the spectacular actions of superheroes on the screen.

益氣化瘀湯加味方이 고지방 식이로 유발된 생쥐의 항고지혈 및 항산화에 미치는 효과

신용진(Yong Jeen Shin),전상윤(Sang Yun Jeon) 한의병리학회 2015 동의생리병리학회지 Vol.29 No.5

교육개혁조치의 근본이념과 현장 적용성에 대한 연구 : 학교운영위원회 제도를 중심으로 A Stdudy on the School-Site Council

조경원(Kyung Won Cho),정진곤(Jeen Gon Cheong),김용식(Yong Sick Kim) 한국초등교육학회 1997 초등교육연구 Vol.11 No.1

이 연구는 정부에서 발표한 다양한 교육개혁조치 가운데 학교현장에 많은 변화를 가져올 것으로 기대되어 왔던 '학교운영위원회'를 선택하여, 그 제도가 추구하고자 하는 목적과 근본이념이 무엇이며, 과연 그러한 목적이 학교현장에서 원래의 의도대로 시행되고 있으며, 그렇지 않다면 그 원인은 무엇이며, 이를 달성하기 위하여 어떤 방향으로 개선되어야 할 것인가를 탐색하였다. 학교운영위원회 제도의 근본이념과 취지는 이제까지의 교장중심의 독단적인 학교운영에서 탈피하여 학교 사회의 주된 구성원인 교장, 교사, 학부모, 지역사회인사 등이 함께 모여 학교의 주요한 일들을 협의해 가는 '학교운영의 민주화'라고 할 수 있다. 그러나 학교현장에서는 이 제도가 위원의 선출, 안건의 상정과 심의 및 의사결정과정 등에서 원래의 취지대로 운영되지 못하고, 비민주적인 방식으로 운영되고 있다. 그 주된 원인은 제도자체의 미비점, 졸속적인 시행과 준비부족, 제도정착을 위한 노력의 미흡, 학교장의 권위주의적 태도 그리고 학부모의 전통적 교육관과 의식 등에서 찾아 볼수 있다. 이를 개선하기 위해서는 학교 급별, 지역별, 학교별로 다양한 형태의 위원회를 구성하여 운영할 수 있도록 허용하고, 위원의 선출과정과 절차의 준수, 위원들의 역할과 권한에 대한 철저한 교육 등이 이루어져야 한다. Korean government like any other countries believes that his future depends on the quality of education. Most people think that current educational systems are not effectively working and students do not study worthwhile knowledges and skills eventhough they work very hard. Such as increasing world-wide competitiveness, technological development requires educational reform. If the future generation continues to concentrate on memorizing inert and tedious informations in these situations, the nations may face serious danger. The Presidential Committee on Educational Reform was organized in 1994 and tried to reestablish educational system of our country. The Committee suggested many educational agenda. Most people at that time appreciated their efforts and hoped their success. The School-Site Council(SSC)is one of such educational reforms of the Committee. The school is not democratic and parents cannot participate in school government. Only the principal has monopolic power in decision and management of the school. The study is to make clear what the fundamental purpose of SSC is. Even though the Presidential Committe suggested three purposes, enhancing the diversity of schoolings, trying to make parents and teachers participate in school administration, and connecting the school with the community, they can be summarized with making the school democtratic. The study finds out how SSC is democratically organized and performing in school. In other words we want to know whether educational ideal of SSC is really achieved in school or not. However, the answer is negative. The procedures and management of electing the members of the council are, first of all, undemocratic. The council members of the parents do not represent them because very few parents among the whole participate in the election. The members in some schools are appointed by the principal. The principal in some cases ask the council to pass the agenda because they are already informed to the parents. The coucil easily agrees with his asking. Such as an agenda about the management of school curriculum is never argued even though the council is to touch upon it. Why is SSC not so effectively working in school? The members, first of all, do not know what their roles are. Most of them are never heard of them and educated. They only guess that SSC is similar with the past parent association which was organized in order to collecting money from the parents for the development of the school. The second reason is that the principal is very authoritarian in most cases. He or she thinks the council do not know what is going in school and cannot make good decision. Most parents are very obedient and seldom against the principal. How can we make achieve the ideal purpose of SSC? We must allow the diversity of SSC. The school district should make an effort to educate the members what they do for the school. The members are to be elected in such ways to represent the whole parents and they are able to do their roles and work hard.

Glutamate 로 유도된 C6 glial 세포의 독성에 대한 八物湯의 보호 효과

신용진(Yong Jeen Shin),신선호(Sun Ho Shin) 한의병리학회 2012 동의생리병리학회지 Vol.26 No.4