• 대한전자공학회논문지SD
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• 제45권11호
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• pp.21-28
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• 2008

본 논문에서는 단 채널 GaAs MESFET의 포화영역에서의 I-V 특성을 도출하기 위한 해석적 모델을 제안하였다. 기존의 단 채널 GaAs MESFET에 대한 해석이 채널 pinch-off의 개념이 도입되는 모델이었던 반면, 본 논문에서는 저자의 소도 포화 영역이 유한한 채널 폭을 갖으면서 전류 연속 조건을 만족하도록 공핍영역의 2차원 전위 분포 식을 도출하였다. 또한 소도 포화영역의 길이를 채널 전체 길이, 채널 도핑 농도, 게이트 전압 및 드레인 전압의 함수로 도출하여 포화영역에서의 Early 효과를 보다 합리적으로 설명할 수 있음을 보이고 있다.

• Bulletin of the Korean Chemical Society
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• 제24권6호
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• pp.837-842
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• 2003

In ab initio molecular dynamics, whenever information about the potential energy surface is needed for integrating the equations of motion, it is computed “on the fly” using electronic structure calculations. For Born-Oppenheimer methods, the electronic structure calculations are converged, whereas in the extended Lagrangian approach the electronic structure is propagated along with the nuclei. Some recent advances for both approaches are discussed.

• 한국중재학회지:중재연구
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• 제15권1호
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• pp.179-206
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• 2005

The development of information & telecommunication technology and internet-based electronic commerce helps to create a new economic environment. Such an economic environment requires the companies to change themselves, while providing unlimited potential and opportunities to them. Thus, in order to help the companies engaged in a fair and free competition in the electronic market, a fair competition policy needs to be designed and operated. The electronic commerce has not only promote the competition but also impede it. The electronic commerces tend to violate the fair trade than the conventional commerces in terms of differentiation, monopoly, conference, limited competition and intellectual property rights, schumpeterian competition, Alliance competition. With such basic concepts in mind, this study was aimed at reviewing the economic effects of the electronic commerce in the market and addressing the problems involving the application of the fair trade code to the electronic commerce, and thereby, suggesting the insights into our fair competition policy and reform measures.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2005년도 하계학술대회 논문집 Vol.6
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• pp.611-612
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• 2005

Fuel cells is proved that potential energy is greater than the existing power generation. In this paper, we describe a principle of fuel cell which is used for next generation portable battery and brief characteristic of direct methanol fuel cells (DMFCs) that used for portable appliances by miniaturization of polymer electrolyte fuel cell. Lastly we describe about research investment for fuel cells.

• 한국정보통신학회논문지
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• 제20권9호
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• pp.1771-1777
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• 2016

본 논문에서는 나노와이어 N-채널 GAA MOSFET의 항복전압 특성을 측정과 3 차원 소자 시뮬레이션을 통하여 분석하였다. 측정에 사용된 나노와이어 GAA MOSFET는 게이트 길이가 250nm이며 게이트 절연층 두께는 6nm이며 채널 폭은 400nm부터 3.2um이다. 측정 결과로부터 나노와이어 GAA MOSFET의 항복전압은 게이트 전압에 따라 감소하다가 높은 게이트 전압에서는 증가하였다. 나노와이어의 채널 폭이 증가할수록 항복전압이 감소한 것은 floating body 현상으로 채널의 포텐셜이 증가하여 기생 바이폴라 트랜지스터의 전류 이득이 증가한 것으로 사료된다. 게이트 스트레스로 게이트 절연층에 양의 전하가 포획되면 채널 포텐셜이 증가하여 항복전압이 감소하고 음의 전하가 포획되면 포텐셜이 감소하여 항복전압이 증가하는 것을 알 수 있었다. 항복전압의 측정결과는 소자 시뮬레이션의 포텐셜 분포와 일치하는 것을 알 수 있었다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2013년도 춘계학술대회
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• pp.762-765
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• 2013

본 연구에서는 이중게이트 MOSFET의 게이트 산화막 두께의 변화에 따른 문턱전압이하 전류의 변화를 분석하였다. 이를 위하여 이중게이트 MOSFET의 채널 내 전위분포를 구하기 위하여 포아송방정식을 이용하였으며 이때 전하분포함수에 대하여 가우시안 함수를 사용하였다. 전위분포는 경계조건을 이용하여 채널크기에 따른 해석학적인 함수로 구하였다. 가우시안 함수의 변수인 이온주입범위 및 분포편차 그리고 게이트 산화막 두께 등에 대하여 문턱전압이하 전류 특성의 변화를 관찰하였다. 본 연구의 전위모델에 대한 타당성은 이미 기존에 발표된 논문에서 입증하였으며 본 연구에서는 이 모델을 이용하여 문턱전압이하 전류 특성을 분석하였다. 분석결과, 문턱전압이하 전류는 게이트 산화막 두께 및 가우시안 분포함수의 변수 등에 크게 영향을 받는 것을 관찰할 수 있었다.

• 한국근적외분광분석학회:학술대회논문집
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• 한국근적외분광분석학회 2001년도 NIR-2001
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• pp.3121-3121
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• 2001

The factors involved in development of electronic grading systems for commodities such as grains and seeds include determination of the factors that influence the end-product utilization of the commodities, and the degree to which these can be predicted by electronic methods. The possibility of exchanging existing methods of grading by electronic methods has to be considered. The respective merits of techniques such as Digital Imaging and Near-infrared (NIR) spectroscopy have to be considered. Digital Imaging is a computerized version of visual inspection and grading, whereas NIR spectroscopy has the potential for grading on the basis of composition and functionality, Selection and evaluation of NIR instruments is an important factor, as are sampling and sample presentation to electronic instruments, and particularly the engineering involved in sample presentation. Sample assembly, and software for calibration development are described in the presentation. Finally the impact and implications of introduction of electronic grading are discussed with particular attention to marketing of the commodities.

• 농업과학연구
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• 제38권3호
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• pp.525-532
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• 2011

The aim of this study was to develop a portable electronic nose system for freshness measurement of meats, which could be an alterative of subjective measurements of human nose and time-consuming measurements of conventional gas chromatograph methods. The portable electronic system was o optimized by comparing the measurement sensitivity and hardware efficiency, such as power consumption and dimension reduction throughout two stages of the prototypes. The electronic nose systems were constructed using an array of four different metal oxide semiconductor sensors. Two different configurations of sensor array with dimension were designed and compared the performance respectively. The final prototype of the system showed much improved performance on saving power consumption and dimension reduction without decrease of measurement sensitivity of pork freshness. The results show the potential of constructing a portable electronic system for the measurement of meat quality with high sensitivity and energy efficiency.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1992년도 추계학술대회 논문집
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• pp.14-17
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• 1992

To analyze Nonvolatile SNOSFET(polySilicon-Nitride-Oxide-Semiconductor Field Effect Transistor) memory device, two dimensional numerical computer simulation program was developed. The equation discretization was performed by the Finite difference method and the solution was derived by the Iteration method. The doping profile of n-channel device which was fabricated by 1Mbit CMOS process was observed. The electrical potential and the carrier concentration distribution to applied bias condition were observed in the inner of a device. As a result of the write and the erase to memory charge quantity, the threshold voltage shift is expected. Therefore, without device fabrication, the operating characteristics of the device was observed under various the processing and the operating condition.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2014년도 제46회 동계 정기학술대회 초록집
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• pp.133.2-133.2
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• 2014

A gap surface plasmon resonator have received considerable attention because it can dramatically enhance the absorption of the electromagnetic field. However, whereas most of studies were just focused on the absorption within a narrow range of wavelength, few studies have been performed for the broadband absorption in the visible range. Therefore, in this study, we discuss methods that can induce broadband light absorption using gap plasmon resonance in visible regime. The gap plasmon resonator will offer great potential for appplications to solar cells and bioimaging.