• 전자공학회논문지 IE
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• v.47 no.1
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• pp.1-5
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• 2010

This paper presents new results of the impact of gate structure on hot-carrier-induced performance degradation in SOI low noise amplifier. Circuit simulations were carried out using the measured S-parameters of H--gate and T-gate SOI MOSFETs and Agilent's Advanced Design System (ADS) to compare the performance of H-gate LNA and T-gate LNA before and after stress. We will discuss the figure of merit for the characterization of low noise amplifier in terms of impedance matching (S11), noise figure, and gain as well as the relation between device degradation and performance degradation of LNA.

• Journal of Power System Engineering
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• v.9 no.3
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• pp.50-57
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• 2005

A cross-flow fan is strongly influenced by the various design factors of a rear-guider and a stabilizer. The purpose of this paper is to investigate the effects of a rear-guider and a stabilizer on the surface pressure of a rear-guider in an indoor room air-conditioner using a cross-flow fan. The design factors considered in this paper are a rear-guider clearance, a stabilizer clearance, and a stabilizer setup angle, respectively. The operating condition of a cross-flow fan was controlled by changing the static pressure and flowrate using a fan tester. All surface pressures of a rear-guider are differently distributed according to the stabilizer setup angle, and show a zero value in the flow coefficient, ${\Phi}{\fallingdotseq}0.5$ only of a stabilizer setup angle, $45^{\circ}$. Especially, they show a big negative value in the expansion angle larger than $34^{\circ}$ regardless of a rear-guider clearance, a stabilizer clearance, and a stabilizer setup angle. On the other hand, surface pressures for various stabilizer cutoff clearances are better than those for various rear-guider clearances.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.10a
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• pp.811-814
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• 2009

The cost competitive products buyers through the e-commerce are growing steadily every year due to the development of the Internet. Furniture and home appliances buyers through the e-commerce, on the other hand, aren't growing cause it's impossible to check the size and harmony with interior. Therefore, in this paper, we introduce arrangement system for furniture and home appliances based on augmented reality and motion recognition to provide service which checks the size and harmony with interior by arranging them virtually before purchasing.

• The Southeast Asian review
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• v.21 no.1
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• pp.185-216
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• 2011

This work shows dynamism of empathy which Thailand experienced while its monarchy was replaced by democracy with conflicts and harmony. In this work, two imaginary protagonists are put into the most important period in Thai history, from the political reform of the absolute monarchy in 1932 up to Black May in 1992, for 60 years. With the writer's imagination, they are actualized into the historically important situations with reality. One of them is Yeoy, a dissident and the other is a police officer, a concenter, who chases after him. In this dissertation, empathy is analyzed which the characters feel about real incidents in their country through trust and doubt, hope and anger. This research on emotional circumstance is all about figuring out the direction for harmony and coexistance. Thailand needs a powerful leader who deals with swiftly changing worldwide affairs and domestically economic matters. Even if their leader has the same destination to get to, their approach to it is different from each other. Therefore, conflicts come out and misunderstanding makes situation worse. Public sympathy among Thai is that Thailand contribute to global mutual prosperity, by which Thailand becomes a powerful and influential state in making the world harmonious and prosperous.

• Journal of Veterinary Clinics
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• v.23 no.3
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• pp.344-348
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• 2006

A 5-year-old, male Yorkshire terrier dog was presented with progressive seizure and anorexia. Definitive diagnosis of necrotizing meningoencephalitis(NME) was made based on characteristic clinical features, brain lesion with MRI, and histopathologic examination. The dog was treated with prednisolone for 20 days, firstly. Prednisolone and mycophenolate mofetil(MMF) were then administered for 40 days following the initial therapy. However, the clinical signs were not improved and seizure frequency was increased. This patient survived around 2 months after diagnosis. This case report described the clinical findings, imaging characteristics and pathologic features of NME in a Yorkshire terrier with trial treatment using MMF.

• Journal of Energy Engineering
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• v.15 no.1 s.45
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• pp.52-59
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• 2006

This paper examined the conversion of methane to hydrogen and other higher hydrocarbons using dielectric barrier discharge with AC pulse power. Two metal electrodes of a coaxial-type plasma reactor were separated by gas gap and an alumina tube. The inner electrode was located inside the alumina tube. The alumina tube was located inside the stainless steel tube, which was used as the outer electrode. Effect of feed gas composition (methane, oxygen, argon, water and helium), flow rate, applied frequency, input volt-age on methane conversion and product distribution were studied. The major products of plasma chemical reactions were ethylene, ethane, propane, buthane, hydrogen, carbon monoxide and carbon dioxide. The increment of applied voltage and the usage of inert gas as the background (helium and argon) enhanced the selectivity of hydrocarbons and methane conversion. The addition of water in the feed stream enhanced the conversion of methane and yield of hydrogen. Higher voltage leads to higher yield of $C_2H_6,\;C_3H_8,\;C_4H_{10}$ and yield or $C_2H_2\;and\;C_2H_4$ appeared highly in lower voltage.

• Journal of Sensor Science and Technology
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• v.7 no.1
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• pp.67-72
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• 1998

The crystallized CuPc and PbTe films are formed by thermal evaporation and pulsed ArF excimer laser ablation. Structural and electrical properties of thin film is observed by XRD and current-voltage(I-V) curves. From XRD analysis, both PbTe and CuPc thin films show a-axis oriented structure. For the measurement of photovoltaic effect, the transverse current-voltage curve of CuPc/Si, PbTe/Si and PbTe/CuPc/Si junctions have been analyzed in the dark and under illumination. The PbTe/CuPc/Si junction exthibits a strong photovoltaic characteristics with short circuit current($J_{sc}$) of $25.46\;mA/cm^{2}$ and open-circuit voltage($V_{oc}$) of 170 mV. Quantum efficiency and power conversion efficiency are calculated to be 15.4% and $3.46{\times}10^{-2}$, respectively. Based on the results of QE and ${\eta}$, the photocurrent process of PbTe/CuPc/Si junction can be explained as following three effective steps; photocarrier generation in the CuPc layer, carrier separation at PbTe/CuPc interface, and finally a transportation of electrons through the PbTe layer.

• Journal of the Korean Society of Floral Art and Design
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• no.44
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• pp.3-31
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• 2021

To verify the types of effects that plants have in our general living conditions, I examined an air quality in living rooms of the three, 129.78m² size, apartments that were with and without plants. and the findings of the study were as addressed below. 1) Experiments showed no statistically significant differences in Case A. However, in Case B and Case C, the standard deviation of PM10, PM2.5 and PM 1.0 verified that each had statistically significant (p<.01) differences. 2) It is believed that the effect of reducing particle matters due to the installation of plants in the indoor space is to vary significantly depending on the indoor environmental conditions, the cleanliness of the room, and the amount of furniture and may also differ depending on the daily dietary cooking method. In addition, it is believed that the planterior will not only reduce indoor fine dust, but also reduce the psychological comfort and eye fatigue of the residents. Nevertheless, supplementary research is needed. 3) In the planterior design for reducing indoor particle matters, various measures were examined. Among them, the vertical wall design method was tested and suggested through empirical experiments. In addition, maintenance methods were proposed depending on the type of indoor plant.

• 전기의세계
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• v.29 no.8
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• pp.511-518
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• 1980

The thermostimulated discharge currents of low-density polyethylene electrets were measured versus the principal experimental variables. Several electrode types were used for the charging and discharging procedures. The results led to know the experimental conditions for the heterocharge and homocharge accumulating and decreasing. The electronic structure parameters of polyethylene such as trap level, density of traps, hopping length, mobility, trap time constants were deduced. A method for evaluating the local electric field inside the electret is proposed.

• Proceedings of the Korea Society of Design Studies Conference
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• 2000.11a
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• pp.124-125
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• 2000

과거의 자동차 인테리어 디자인은 스타일링이나 인간공학적 측면을 주로 배려하여 디자인되어 왔다. 그러나 시간의 흐름에 따른 사용자의 가치 및 요구(needs)의 다양화, 흑은 관련 기술의 발전에 따라 "주행" 중 "제어"해야하는 많은 기능들이 추가됨에 따라 이러한 다양한 조작 대상들을 동시에 조작하거나 조작하기 위한 학습이 점점 더 어려워지고 있는 실태이다. (중략)