• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1999년도 춘계학술대회 논문집
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• pp.473-476
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• 1999

PMOS capacitors with Ce-policide electrode were fabricated by the SADS method to study the effects of activation condition on the C-V characteristics. For the activation temperature of $600^{\circ}C$ , the capacitor using CoSi$_2$ formed from Co/Ti bilayer as diffusion source showed excellent C-V properties and the increase in V$_{th}$ with the increasing activation time. But impurties into the oxide.e.

• 한국전기전자재료학회논문지
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• 제20권3호
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• pp.207-212
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• 2007

The concentration profiles of deep energy levels($E_c$ -0.23e V, $E_v$+0.36e V and $E_c$ -0.23e V) in platinum-diffused silicon have generally a sharp gradient in the vicinity of the surface of the silicon wafer. In this work two efficient methods are proposed to obtain the uniform concentration profiles throughout the silicon wafer. One is that the platinum diffusion is carried out at $1000^{\circ}C$ for 1h in oxygen atmosphere. In this case the values of obtained uniform concentration, $1{\times}10^{15}cm^{-3}$ for the $E_c$ -0.23e V level, and 1{\times}10^{14}cm^{-3}$ for the $E_c$ -0.52e V level, are very restricted, respectively. The other is two-step annealing process. The platinum diffusion is carried out at $850{\sim}1100^{\circ}C$ in a nitrogen ambient for 1h and then the annealing is performed at $1000^{\circ}C$ in oxygen ambient after removing platinum-source from the platinum diffused samples. The advantage of this method is that the uniform concentration of these levels required power devices can be controlled by setting the desired temperatures when the platinum diffusion is carried out in nitrogen ambient.

• 산업경영시스템학회지
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• 제16권28호
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• pp.137-143
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• 1993

Generally there are three methods to derive an approximation formula: 1) approching standard normal distribution by appropriate changing variable 2) using standardization variable for expansion 3) deriving approximation formula by direct method. This paper present correction terms having the form of $C_{1/v^{n/2}}/{\;}+{\;}C_2{\;}(n=1,2)$ with respect to $x^2_{\alpha}(v)$ distribution (${\nu}{\;}{\leq}{\;}30$), which minimize the error by EDA method and least square method.

• Annals of Clinical Neurophysiology
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• 제19권1호
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• pp.28-33
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• 2017

Background: Previous studies of radial nerve conduction study (NCS) did not present how to measure the length of the radial nerve across the elbow, and did not even mention how to manage the spiral course of the nerve. This study aimed to applicate the most reliable method to measure the length of the radial nerve during NCS. Methods: Three points (A, B, and C) were determined along the relatively straight course of the radial nerve. The distance was measured using three different methods: L1) straight distance corresponding to the A-C distance, L2) sum of the distances corresponding to the A-B-C distance, L3) based on the L2, but the elbow is flexed at a $45^{\circ}$ angle. We compared the three methods of distance measurement and the calculated nerve conduction velocities (V1, V2, and V3) in normal healthy subjects. Results: 19 normal participants were enrolled. The mean value for method L1, L2 and L3 were $22.5{\pm}1.8cm$, $24.0{\pm}2.1cm$, and $23.2{\pm}2.1cm$ (p < 0.001). Calculated conduction velocities using those distance measurement methods as follows (p < 0.001): V1 ($60.9{\pm}2.7m/s$), V2 ($64.6{\pm}3.3m/s$), and V3 ($63.4{\pm}3.9m/s$). V2 was significantly greater than V1 and V3 (p < 0.001, p = 0.010, respectively). Conclusions: The distance measurement using a stopover point near the lateral epicondyle between two stimulus points in position of a fully extended elbow with forearm pronation is the most appropriate posture for radial motor NCS.

• 전기화학회지
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• 제16권3호
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• pp.151-156
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• 2013

리튬이온 전지의 양극물질로써, 초임계 수열합성법을 이용해 만들어진 분말은 각각 $850^{\circ}C$와 $900^{\circ}C$ 공기 분위기에서 10시간씩 소성하여 $LiNi_{0.5}Mn_{0.3}Co_{0.2}O_2$를 합성하였다. 온도를 조절함에 따라 합성된 분말은 어떠한 영향을 받는지 x-ray pattern, SEM-image, 물리적 특성과 전기화학적 거동을 관찰해 연구하였다. 그 결과, $900^{\circ}C$에서 열처리된 물질의 입자크기가 $850^{\circ}C$에서 열처리된 물질에 비해 더 큰 것으로 나타났고, 특히 초기 가역용량 163.84 mAh/g (0.1 C/2.0-4.3 V), 186.87 mAh/g (0.1 C/2.0-4.5 V)의 가역용량을 나타내면서 훌륭한 전기화학적 거동을 보였으며, 50th cycle에서도 91.49%(0.2 C/2.0-4.3 V)와 90.36%(0.2 C/2.0-4.5 V)의 높은 용량 유지율을 보였다.

• E2M - 전기 전자와 첨단 소재
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• 제9권5호
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• pp.445-449
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• 1996

Structural and optical characteristics in Se thin film fabricated by EBE method had been studied. Se thin film was deposited with noncrystalline until substrate temperature of >$100^{\circ}C$ Color of its surface had red genealogy, and its optical energy band gap was about 2.45 eV. But Se film was grown with monoclinic at substrate temperature of over >$150^{\circ}C$ Also, color of its surface had gray genealogy, and its optical energy band gap was about 2.31 eV. Finally, after heat-treatment at >$150^{\circ}C$ for 15 min with substrate temperature of >$100^{\circ}C$ noncrystalline Se was proved to be hexagonal, and color of its surface had dark gray genealogy, and its optical energy band gap was about 2.06 eV. From the results, it was known that Se thin film for photoelectric device with the lowest optical energy band gap was accepted from hexagonal structure.

• 한국산학기술학회논문지
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• 제13권3호
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• pp.1337-1345
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• 2012

한반도 전구에서 적용되고 있는 EBO의 핵심교리는 측정 가능한 효과를 선정하여 최소의 전투로 승리하는 것이다. 이러한 EBO 교리를 고찰하여 무기체계 획득에 요구되는 방법론으로 V-C 연동체계 하에서의 효과분석 방법론을 연구 제시하였다. 제시된 방법론은 먼저 편성된 무기체계의 효과 정보를 확인하고 분석목적을 고려하여 MOE와 MOP, 효과를 설정하며 적정 무기체계의 운용개념과 시나리오 등을 적용하고 가용 C모델로 사후분석 조정 환류 하는 것이다. V-C 연동체계는 가상 합성 전장 환경에서의 실시간 전투실험을 가능케 한다. 이러한 V-C 연동체계에서 미래 대전차 유도무기체계의 방어전투 편성과 배치 등을 고려한 모델링으로 대대급 작전으로 중대급 개체를 운용하는 시나리오를 작성, AWAM을 구현하여 효과를 분석하고 SBA 토대를 구축하였다.

• Journal of Radiation Protection and Research
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• 제26권3호
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• pp.287-290
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• 2001

The 9.17MeV gamma-rays from the $^{13}C(p,\;{\gamma})^{14}N,\;^{14}N({\gamma},\;{\gamma})^{14}N$ reactions were measured. The incident 9.17MeV gamma-ray was produced from the $^{13}C(p,\;{\gamma})^{14}N$ reaction at Ep=1.75MeV resonance. The 1.75MeV proton beam was accelerated using the 3MV SNU-AMS Tandetron and 1.7MV KIGAM Tandem accelerators. The enriched 13C target was $121{\mu}g/cm^2$ self-supporting foil, and we used liquid nitrogen as a resonant absorption target. We used a HP-Ge detector with 30% efficiency and less 2keV energy resolution. We developed new method to detect the scattered 9.17MeV gamma-ray from the nitrogen target by using the energy difference between the Doppler shifted gamma-ray from the $^{13}C(p,\;{\gamma})^{14}N$ reaction and the resonant absorbed and rescattered gamma-ray from the $^{14}N({\gamma},\;{\gamma})^{14}N$ reaction.

• 열처리공학회지
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• 제13권6호
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• pp.398-404
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• 2000

The Ti-Al-V-N films have been deposited on various substrates by d.c and r.f reactive magnetron sputtering from a Ti-6Al-4V alloy target in mixed $Ar-N_2$ discharges. The films were investigated by means of XRD, AES, SEM/EDX, microhardness, TG and scratch test. The XRD and SEM results indicated that the films were of single B1 NaCl phase having dense columnar structure with the (111) preferred orientation. The composition of Ti-Al-V-N film was the Ti-7.1Al-4.3V-N(wt%) films. Adhesion and microhardness of Ti-Al-V-N films deposited by r.f magnetron sputtering method were better than those deposited by d.c magnetron sputtering method. The anti-oxidation properties of Ti-Al-V-N films were also superior to that of Ti-N film deposited by the same deposition conditions.

• 한국응용과학기술학회지
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• 제28권1호
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• pp.48-56
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• 2011

In this study, we investigated the C-V diagrams and metal surface related to the electrochemistry characterization of metal(nickel, SUS-304). We determined electrochemical measurement by using cyclic voltammetry with a three-electrode system. A measuring range was reduced from initial potential to -1350mV, continuously oxidized to 1650 mV and measured to the initial point. The scan rate were 50, 100, 150, 200 and 250 mV/s. As a result, the C-V characterization of metal using N,N-dimethylacetamide and N,N-dimethylformamide inhibitors appeared irreversible process caused by the oxidation current from the cyclic voltammogram. After adding organic corrosion inhibitors, adsorption film constituted, and the passive phenomena happened. According to the results by cyclic voltammetry method, it was revealed that the addition of inhibitors containing amide functional group enhances the corrosion resistance properties.