집적화된 실리콘 압력센서의 출력전압 보상파라미터 추출 및 그 특성

이보나,김건년,박효덕,신상모,이경탁,김찬,권혁채,이상조,박현주 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1

An integrated silicon pressure sensor has been designed, fabricated and tested. The signal conditioning circuits were designed to include calibration and temperature compensation of output voltage through trimming of diffusion and ion-implanted resistors. Before trimming of resistors, the compensation parameters such as pressure sensitivity, temperature coefficient of pressure sensitivity, temperature coefficient of piezoresistors and pressure sensitivity of piezoresistors were measured. Then offset voltage, span, and temperature coefficients of offset voltage and span were calibrated by trimming of resistors. The measured output voltage met our design specification and simulation value above room temperature. But, the measured output voltage at -30°C deviated from our design specification and simulation value because the offset voltages were found to vary randomly as a function of temperature.

Si Bulk Micromachining을 위한 Wafer Rolling Etching 및 그 특성

김건년,이보나,박효덕,신상모,공경준,장동근,김병철,권혁채,이봉희 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1

A wafer rolling etching system for the silicon bulk micromachining has been designed and fabricated. The silicon diaphragms were anisotropically etched in a 24.5 weight percent KOH solution. Compared to the conventional KOH etching systems, pyramidal hillocks, and wave-shaped structures on the etched surfaces were greatly reduced by using this system. After etching for time of 438 minutes, the average etched depth and the etch-rate were measured to be 537μm and 1.22μm/min, respectively. The average etching uniformity of etching depth was 0.87% in 5-inch wafer. Our results showed that the wafer rolling method enhanced etch uniformity and etch rate.

보행훈련방법이 편마비 환자의 보행요소와 족저압에 미치는 영향

김은정,황보각,권혁철 대구대학교 특수교육재활과학연구소 2009 再活科學硏究 Vol.27 No.2

이 연구는 뇌졸중으로 인한 편마비 환자에게 보행훈련방법을 달리하였을 때, 일반적인 지면과 트레드밀, 불안정면을 이용한 보행훈련이 보행요소와 족저압에 미치는 영향을 알아보기 위하여 편마비 환자 30명을 지면과 트레드밀, 불안정면 보행훈련군으로 무작위 배정하고 각 치료군들은 주 5회, 8주 간의 보행훈련을 실시하였다. 실험 전과 후, 보행요소를 알아보기 위하여 보행속도, 보장, 보각과 족저압을 측정하여 수집된 자료를 분석하여 다음과 같은 결과를 얻었다. 이 연구의 결과를 종합해 보면 보행훈련방법에 따라 지면 보행훈련은 보행속도와 족저압 전족부, 트레드밀 보행훈련군은 보행속도와 보각, 족저압 중족부, 불안정면 보행훈련군은 보행속도와 보장, 보각에서 유의한 증가를 보였다. 이러한 결과는 뇌졸중으로 인한 편마비 환자에게 보행훈련방법을 달리함에 따라 많은 영향을 끼치어, 환경의 변화와 다양한 과제에 대한 적절한 반응을 만들어 낼 수 있음을 의미하며, 기능 회복의 임상적 접근에서 치료 중재의 시점과 기간, 제공되는 환경, 과제의 선택에 대한 광범위한 연구가 필요할 것으로 생각되어진다. Purpose : This study was performed for effects of gait component and plantar foot pressure on gait training way needed in gait with hemiplegic patients caused by cerebrovascular accident. Methods : Three groups of adult hemiplegia(n=30) were allocated randomly in this study : group I(TGT : treadmill gait training), group II(USGT : unstable surface gait training) and group III(SGT : surface gait training). The gait training was provided to experimental groups for 8 weeks(5 times a week). Measurements of pre and post experiment were gait velocity, step length, toe out angle, foot plantar pressure which demonstrate temporal-spatial parameter of gait component. Results : The results of this study showed that in comparison of pre and post changes of gait training, SGT group has statistically significant differences in gait velocity, metatarsal area of foot plantar pressure, TGT group has statistically significant differences in gait velocity, toe out angle, midfoot of foot plantar pressure. USGT group has statistically significant differences in gait velocity, step length, toe out angle. Conclusion : These results mean gait training resulted by gait training way provides effective gait, with stroke, and therefore proper response about environmental changes and various tasks could be made.

고두께 유리-실리콘의 대면적 양극접합에 관한 연구

김건년,이보나,박효덕,신상모,이근혁,권혁채 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1

In this paper, we studied the anodic bonding of 5-inch silicon and #7740 Pyrex glass wafers with a thickness of 3mm by using the EV501 bonder and the Karl Suss SB6 bonder. The test conditions for anodic bonding of the EV501 bonder system with a full field electrode were temperature of 400 ℃ and voltage of 800V in a chamber pressure of 1X10^(3)mbar. The SB6 bonder with a star shaped electrode was tested at the temperature and voltage of 450 ℃ and 1300V in the atmosphere, respectively. As the results of test, we obtained the void free samples regardless of shape of substrates such as etched wafers with cavities and drilled glasses with holes.

Papain 유도 호흡기 염증모델에서 인삼패독산(人蔘敗毒散)의 항염증 효과

우연주, 유준상, 이동혁, 서진우, 김주희, 권보인 상지대학교 한의학연구소 2023 尙志韓醫論文集 Vol.11 No.1

Objectives: Insampaedok-san and its main components have been used for treatment of fever, joint pain, cough, headache and pain. Using a respiratory inflammation model, we intend to investigate the anti-inflammatory effect and its mechanism of Insampaedok-san. Methods: We induced the actue respiratory inflammatory mouse model by papain treatment. BALB/C mice (female, 8 weeks old) were divided into three groups as follows: saline control (SC): papain treated group (vehicle): papain and Insampaedok-san (200mg/kg) treated group (n=4). To demonstrate the ani-inflammatory effect of Insampaedok-san water extracts, inflammatory cell infiltration was evaluated in bronchoalveolar lavage fluid (BALF) and nasal lavage fluid (NALF). In addition, immunogloblin (Ig)-E level was measured by using ELISA. Results: Insampaedok-san extracts administration decreased inflammatory cell infiltration in BALF and NALF. Especially, eosinophil infiltration was dramatically reduced. Furthermore, total Ig-E level was diminished in BALF and serum by Insampaedok-san administration. Conclusions: Our findings revealed Insampaedok-san extracts have anti-inflammatory effects by inhibiting inflammatory cell, especially eosinophil infiltration and Ig-E level.

디지털 교과서 활용이 학습자의 인지 기능에 미치는 영향-EEG 연구

권석원(Kwon Suk Won),권용주(Kwon Yong Ju),양일호(Yang Il Ho),변정호(Byun Jung Ho),이일선(Lee Il Sun),권승혁(Kwon Seung Hyuk),김순미(Kim Soon Mi),박상희(Park Sang Hee),김윤영(Kim Yoon Young),계보경(Kye Bo Kyung),정광훈(Jung Kwang Hun) 학습자중심교과교육학회 2015 학습자중심교과교육연구 Vol.15 No.2

본 연구의 목적은 디지털교과서 및 서책형교과서 활용이 인지 기능에 미치는 영 향을 알아보기 위한 것이다. 연구대상자는 모두 5학년으로 디지털교과서 활용반 20 명, 서책형 교과서 활용반 21명이었다. 뇌파 측정은 안정상태, 단기기억, 작업기억, 공간인지 과제 수행간 이루어졌다. 행동과제 분석 결과, 단기기억과 공간인지 과제 수행시 디지털교과서 활용 그룹과 서책형교과서 활용 그룹간 통계적 차이는 발견되 지 않았다. 뇌파분석 결과, 디지털교과서 활용그룹이 서책형교과서 활용그룹에 비해 우측 전두엽 인근 델타대역에서의 부적 두뇌 활성이 관찰되었다. 또한, 디지털교과 서 활용 그룹에 비해 서책형교과서 활용 그룹이 공간인지 과제 수행시 전두엽을 중 심으로 민감도가 높게 나타남을 확인할 수 있었다. 본 연구 결과를 통해 디지털교과 서 활용이 인지기능에 미치는 영향을 확인하였고, 이를 바탕으로 디지털 교재 개발 의 나아갈 방향과 후속 연구를 제안하였다. The purpose of the this study was to investigate effects of using a digital textbook on cognitive function. We recorded EEG(resting state, short term memory task, working memory task, spatial cognition task) from 20(digital textbook group) and 21(paper textbook group), 5th elementary school volunteers. The results of behavioral tasks(short term memory and spatial cognition task), revealed no significant differences between digital textbook and paper textbook group. The results of an EEG, the digital textbook group that negative oscillate more than the paper textbook group around the right frontal(delta range) and paper textbook group that higher sensitivity more than the digital textbook group appears around the frontal area performing the tasks in spatial cognition. The results of this study provide effects of using a digital textbook on cognitive function and suggest that the directions for development of digital textbook and further research based on analysis results.

디지털 교과서와 서책형 교과서 사용시 두뇌 활성 차이-EEG 연구

권석원(Kwon, Suk-Won),권용주(Kwon, Yong-Ju),양일호(Yang, Il-Ho),변정호(Byun, Jung-Ho),이일선(Lee, Il-Sun),권승혁(Kwon, Seung-Hyuk),김순미(Kim, Soon-Mi),박상희(Park, Sang-Hee),김윤영(Kim, Yoon-Young),계보경(Kye, Bo-Kyung),정광훈(Jung, 학습자중심교과교육학회 2014 학습자중심교과교육연구 Vol.14 No.5

정보통신 전자기술이 발달하고 확산됨에 이를 이용한 스마트 교육이 점점 확산되고 있다. 이에 스마트 기기를 이용한 디지털 교과서의 사용에 대한 우려가 증가하고 있다. 이 스마트 교육의 보급을 위해서 디지털 교과서 사용에 따른 역기능에 대한 체 계적인 진단 및 분석에 대한 요구의 목소리가 높아지고 있다. 이에 본 연구의 목적은 디지털 교과서 사용의 뇌기능에 대한 영향을 규명하고 안전하고 올바른 활용 방안을 제시하는 것이다. 이를 위해 먼저 디지털 교과서 활용 시 학습자의 두뇌 활성 영향분석을 위해 실험 연구를 진행하였다. 연구 결과, 디지털 교과서 사용시 서책형 사용에 비해 델타와 감마대역에서 우측 전두엽, 두정엽, 피질하 일부 영역과 변연계 중뇌섬엽에서 유의하게 두뇌 활성 및 강도가 높게 나타났다. 본 연구를 바탕으로 디지털 교과서의 안전하고 올바른 사용을 위해 관련 뇌과학연구의 확대와 가이드라인의 제작 및 제시, 교사와 함께하는 스마트 교육의 발전을 위한 추가 연구의 필요성을 제시하였다. The smart education is spreading to more and more according to development of information and communication technologies and the proliferation of electronic communication. It is increasing concerns about using digital device based on digital textbooks. The growing calls for systematic diagnosis and analysis about dysfunction of using digital textbooks for the proper prevalence of smart education. Therefore, the purpose of this research is to investigate the effect on brain function using digital textbooks and to propose ways to ensure safe and proper utilization. To reach the purpose, experimental research was conducted for analysis effect on brain activation of learner using digital textbooks. A comparative study of active region of the brain when students use digital textbook or paper textbook, this results of this study, we observed a significant delta and gamma power increase in right frontal, parietal and insula(Sub-lobar) in using the digital textbook. Though this research, It is revealed that using digital textbook effect especially on brain function. And we propose a enlargement of smart education related brian science research, manufacture and present guide-line and necessity of additional research for development smart education with teachers.

InGaAs-based Tunneling Field-effect Transistor with Stacked Dual-metal Gate with PNPN Structure for High Performance

Kwon, Ra Hee,Lee, Sang Hyuk,Yoon, Young Jun,Seo, Jae Hwa,Jang, Young In,Cho, Min Su,Kim, Bo Gyeong,Lee, Jung-Hee,Kang, In Man The Institute of Electronics and Information Engin 2017 Journal of semiconductor technology and science Vol.17 No.2

We have proposed an InGaAs-based gate-all-around (GAA) tunneling field-effect transistor (TFET) with a stacked dual-metal gate (DMG). The electrical performances of the proposed TFET are evaluated through technology computer-aided design (TCAD) simulations. The simulation results show that the proposed TFET demonstrates improved DC performances including high on-state current ($I_{on}$) and steep subthreshold swing (S), in comparison with a single-metal gate (SMG) TFET with higher gate metal workfunction, as it has a thinner source-channel tunneling barrier width by low workfunction of source-side channel gate. The effects of the gate workfunction on $I_{on}$, the off-state current ($I_{off}$), and S in the DMG-TFETs are examined. The DMG-TFETs with PNPN structure demonstrate outstanding DC performances and RF characteristics with a higher n-type doping concentration in the $In_{0.8}Ga_{0.2}As$ source-side channel region.

Assessment of the core cryparin promoter from Cryphonectria parasitica for heterologous expression in filamentous fungi

Kwon, Bo-Ra,Kim, Myoung-Ju,Park, Jin-A,Chung, Hea-Jong,Kim, Jung-Mi,Park, Seung-Moon,Yun, Sung-Hwan,Yang, Moon-Sik,Kim, Dae-Hyuk Springer-Verlag 2009 Applied microbiology and biotechnology Vol.83 No.2

The Necessary and Sufficient Fragment of Promoter for a High Level Expression of the Cryparin Gene

Bo-Ra Kwon,Jung-MI Kim,Hwan-Gyu Kim,Seung-Moon Park,Dae-Hyuk Kim 한국생물공학회 2007 한국생물공학회 학술대회 Vol.2007 No.10