• 전기전자학회논문지
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• 제16권4호
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• pp.405-409
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• 2012

In this paper, on-chip antennas applicable to ultra low power wireless transceiver are designed and evaluated. Using $0.18{\mu}m$ SiGe MMIC process, 4 types of antenna with $1{\times}1mm^2$ dimensions are fabricated. The on-wafer measurement in a microwave probe station is conducted to measure the input VSWR and antenna performance of the designed on-chip antenna. Performance evaluation results show that developed antennas can be easily integrated into one-chip RF transceiver for ubiquitous applications, including WPAN and human body communications.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 춘계학술대회 논문집 전기설비전문위원
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• pp.68-71
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• 2007

In this paper, we developed HPF (high pass filter) consisted of lumped LC components to decrease the noises that are detected in PD (partial discharge) measuring test, and adapted it to field test. We tested under laboratory circumstances like the fields, and measured the phase change properties of detected signal in UHF sensor with Lemke probe and oscilloscope (TDS-3054, Tektronix).

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.2036-2037
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• 2007

반사형 펄스와전류(Pulsed Eddy Current; PEC) 탐상을 위한 여러 가지 탐촉자를 설계하고, 수치해석 방법을 사용하여 신호특성과 두께변화에 대한 만감도를 조사하였다. 구리와 페라이트를 차폐체로 사용한 결과, 구리로 차폐한 여자코일이 페라이트로 차폐한 센서코일보다 안쪽에 있는 것이 두께변화에 더 민감하였고, 페라이트만으로 차폐한 경우에도 여자코일이 안쪽에 있는 것이 더 민감하다는 것을 알 수 있었다. 한편, 두께가 두꺼워지면 펄스신호의 피크치는 감소하며 피크 발생시간이 변화하는 것을 관찰할 수 있었다.

• 한국정보통신설비학회:학술대회논문집
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• 한국정보통신설비학회 2008년도 정보통신설비 학술대회
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• pp.566-569
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• 2008

와전류탐상(ECT) Transmit-Receive 프로브를 이용한 ECT 방법은 센서코일의 유도기전력의 변화를 관찰하여 피검사체의 결함이나 특성의 변화를 탐지해내는 방법이다. ECT T/R 프로브는 여러 개의 Pancake 코일로 구성되어있고, 각각의 코일은 Transmit 코일과 Receive 코일로 나뉜다. 본 논문은 실제 TH 프로브 제작에 앞서 동일한 특성을 갖는 와전류센서를 설계 및 제작하여 그 특성을 파악하였다. 와전류센서에 인가되는 시험주파수와 Lift-off의 변화에 대한 특성을 파악하고 와전류센서의 임피던스값을 산출하여 정규화 임피던스도를 그려 와전류센서의 특성을 살펴보았다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2005년도 하계학술대회 논문집 Vol.6
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• pp.215-216
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• 2005

To decrease and remove of much noises that is detected in PD (partial discharge) measuring test. we forced on detection of those. We made W-LC filter for measuring PD. which adapted that to field test. We tested after design laboratory circumstances like field line. and then the phase change properties of detected signal in UHF sensor were measured by Lemke Probe and oscilloscope (TDS-3054. Tektronix). Eventually we checked decrement of noises from experimental result. Also from experimental result at the joint box of 22.9[kV] distribution line. we obtained reasonable data which enable noises to decrease. Hereafter those results will be adapted at ultra-high voltage for trouble prevention and on-line cable watch. diagnosis of those.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2000년도 추계학술대회논문집
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• pp.161-164
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• 2000

Currently, Atomic Force Microscope(AFM) has been widely used to measure the surface topography of a sample by detecting interaction force between atoms on the sample and extremely sharp probe tip. The vertical resolution of AFM is mainly determined by external vibration noise. The resolution of AFM shows different values for the different environment, thus it is necessary to determine relationship between the criteria and the resolution of AFM regardless of environment. In this paper, we discuss the allowable level of floor vibration for AFM equipment at given resolution. The vibration criteria can be used as reference data to design mechanical structure and to analyze the structural dynamics of AFM equipment.

• 반도체디스플레이기술학회지
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• 제18권2호
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• pp.53-57
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• 2019

In this study, we prepared sputtering cathode for large sputtering thin film in the facing targets sputtering(FTS) system. Before fabrication of cathode equipment, we investigated optimal magnetic flux in the sputtering cathode by using magnetic field stimulation(Comsol). According to the result of magnetic field stimulation, we manufactured the cathode. After we mounted laboratory-designed cathode on FTS system, the discharge properties were observed in vacuum condition. In addition, ITO films were deposited on glass substrate and their electrical and optical properties were investigated by various measurements (four-point probe, UV-VIS spectrometer, field emission scanning electron microscopy(FE-SEM), Hall-effect measurement).

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2011년도 춘계학술발표대회
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• pp.1595-1597
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• 2011

과거에는 고속도로 상에 일정간격으로 설치하여 운영 중인 VDS(Vehicle Detection System)에서 주기적으로 검지되는 지점자료나 실제로 도로를 주행하면서 교통상황을 측정하는 프로브 차량(Probe Vehicle)들을 이용하여 통행시간을 추정해 왔으나 단순한 현시점에서의 통행시간을 나타내는 점이나 설치구간이 조밀하지 못한 곳에서의 정확성 등 많은 문제점이 있어왔다. 이에 본 연구에서는 고속도로 통행료 수납자료(Toll Collection System)를 출발시각 기준으로 정렬하고, 이를 Fuzzy c-means 클러스터링 기법을 사용하여 고속도로 통행료 수납자료의 특성에 따라 분류한 후 하나의 대푯값으로 추출하여 Kalman Filter 기법에 적용하는 고속도로 통행시간 예측 모형을 설계한다.

• 천문학회보
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• 제45권1호
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• pp.39.2-39.2
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• 2020

Based upon the previous heritage in the complete development of the infrared imaging spectrometer, NISS (Near-infrared Imaging Spectrometer for Star formation history) onboard NEXTSat-1, we are participating in the NASA MIDEX mission (PI Institute: Caltech), the all-sky infrared spectro-photometric surveyor SPHEREx (Spectro-Photometer for the History of the Universe, Epoch of Reionization, and Ices Explorer). The SPHEREx will provide us the first all-sky infrared spectro-photometric data set to probe the origin of our Universe, to explore the origin and evolution of galaxies, and to explore whether planets around other stars could harbor life. After the SPEHREx have passed the PDR (Preliminary Design Review) on this September, the fabrication of flight hardware will be started soon. As an international partner, KASI takes part in the hardware development, the operation and the science for the SPHEREx. Here, we report the status of the SPHEREx project and the progress in the Korean participation.

• 한국의상디자인학회지
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• 제17권2호
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• pp.79-92
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• 2015

Covers of fashion magazines are part of the media that reflects the zeitgeist. Thus an analysis of the covers is a tool to probe the social and cultural changes of a period. This study attempts to shed light on the changes of the image of women on the cover of men's fashion magazines; this study intends to investigate the changes of status and role of women, from the past up to the present, through analyzing the meaning of the image of female models. For this purpose, this study conducts both literature and corroborative research. The period for the analysis is limited to post-1960s when female models began to appear alone on the cover of men's fashion magazine. The three decades from the 1960s through today have been analyzed according to its characteristics. The result is as follows: female models in the 1960s were shown as subjugated and ancillary to men as a commodity for the affluent materialistic civilization after World War II. In the 1970s, thanks to feminism movement, the image of resistance dominated. As a result of women's right movement, the 1980s came to witness the female image of subjective characteristics. Finally, starting in the 1990s, a mixture of subjugated, resistant, and subjective image of female models has appeared. In the contemporary culture, where the communication through images is being increased, the image of the female models in fashion magazines could work as a criterion to measure the social change.