• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2000년도 추계학술대회논문집
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• pp.17-20
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• 2000

This study is about a retrograde triple well employed in the Cell tr. of next DRAM and flash memory. triple well structure is formed deep n-well under the light p-well using MeV ion implantation. MeV P implanted deep n-well was observed to show greatly improved characteristics of electrical isolation and soft error. Junction leakage current, however, showed a critical behavior as a function of implantation and annealing conditions. {311} defects were observed to be responsible for the leakage current. {311} defects were generated near the R$\sub$p/ (projected range) region and grown upward to the surface during annealing. This is study on the defect behavior in device region as a function of implantation and annealing conditions.

• 한국정밀공학회지
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• 제13권5호
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• pp.44-52
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• 1996

A procedure predicting warpage and post-deformation due to heat resistance test is presented. The procedure is applied to the injection molding processes of automotive plastic components, which are the door trim and the instrument pannel. The warpage of products is obtained from the residual stress after filling, packing and cooling process, and the post deformation due to the heat resistance test is calculated in the structural analysis of the product at the ejection temperature with the initial condition of residual stress, the boundary conditions and heat resistance conditions. The analyses give some useful guide lines in the design of automotive plastic parts which should satisfy heat resistance regulation.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2000년도 추계학술대회 논문집
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• pp.17-20
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• 2000

This study is about a retrograde triple well employed in the Cell tr. of next DRAM and flash memory. Triple well structure is formed deep n-well under the light p-well using MeV ion implantation. MeV P implanted deep n-well was observed to show greatly improved characteristics of electrical isolation and soft error. Junction leakage current, however, showed a critical behavior as a function of implantation and annealing conditions. {311} defects were observed to be responsible for the leakage current. {311} defects were generated near the R$\_$p/ (Projected range) region and grown upward to the surface during annealing. This is study on the defect behavior in device region as a function of implantation and annealing conditions.

• 여성건강간호학회지
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• 제27권3호
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• pp.180-195
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• 2021

Purpose: This study aimed to summarize the current evidence on the effects of nonpharmacological interventions on psychological health outcomes for women with high-risk pregnancies due to conditions such as preeclampsia, gestational diabetes, or preterm labor. Methods: The following databases were searched from January 2000 to December 2020: PubMed, Ovid Embase, CINAHL, Web of Science, DBpia, RISS, and KISS. Two investigators independently reviewed and selected articles according to the inclusion/exclusion criteria. RoB 2 and the ROBINS-I checklist were used to evaluate study quality. Results: Twenty-nine studies with a combined total of 1,806 pregnant women were included in the systematic review and meta-analysis. Psychological health improvements were found in women with preeclampsia (Hedges' g=-0.67; 95% confidence interval [CI], -0.91 to -0.44), gestational diabetes (Hedges' g=-0.38; 95% CI, -0.54 to -0.12), and preterm labor (Hedges' g=-0.73; 95% CI, -1.00 to -0.46). The funnel plot was slightly asymmetrical, but the fail-safe N value and the trim-and-fill method showed no publication bias. Conclusion: Nonpharmacological interventions for women with high-risk pregnancies due to conditions such as preeclampsia, gestational diabetes, and preterm labor can improve psychological parameters such as anxiety, stress, and depression. Nurses can play a pivotal role in the nursing management of pregnant women with high-risk conditions and apply various types of nonpharmacological interventions to meet their needs in uncertain and anxious times during pregnancy.

• 한국진공학회지
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• 제15권4호
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• pp.387-394
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• 2006

본 연구에서는 반응성 이온빔을 low-angle forward reflection으로 생성시킨 중성빔을 이용하여 Aspect Ratio Dependent Etching (ARDE) 현상이 제거되는 효과에 대하여 연구하였다. SF6 가스를 사용하여 Inductively Coupled Plasma system과 이온빔으로 각각 poly-Si 을 식각한 결과 ARDE 현상을 관찰할 수 있었으며, Si 기판위에 증착된 Poly-Si을 식각하는 것보다 $SiO_2$ 기판 위에 증착된 Poly-Si을 식각하는 것이 ARDE 현상이 더 많이 나타난다는 것을 관찰할 수 있었다. 반면에 같은 공정 조건에서 중성빔으로 poly-Si을 식각한 결과 이러한 ARDE 현상이 효과적으로 제거되었음을 관찰할 수 있었다. 중성빔을 이용하여 ARDE 현상이 제거되는 원리는 2 차원의 XOOPIC code 와 TRIM code를 사용하여 여러가지 나노스케일의 형상을 컴퓨터 시뮬레이션하여 증명하였다.

• 한국진공학회지
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• 제20권2호
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• pp.100-105
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• 2011

이온을 Si(100) 기판에 주입할 때 조사량과 에너지, 빔 전류가 면저항에 영향을 미치는 원인을 규명하기 위해 여러 연구자가 행하였던 실험과 동일한 조건으로 Crystal TRIM 프로그램을 이용하여 컴퓨터 시뮬레이션을 실행하였다. 주입한 $As^+$이온의 조사량을 $1{\times}10^{15}/cm^2$로 일정하게 하고 에너지를 5, 10, 15 keV로 변화시켜 계산한 결과 에너지가 커질수록 Rp값은 표면에서 깊어지는 반면에, 표면근방에 축적되는 격자손상은 증가하였다. 20keV의 B+이온을 $5{\times}10^{15}/cm^2$의 동일한 조사량으로 1mA와 7 mA의 빔 전류에 해당하는 값을 이용하여 계산한 결과 빔 전류가 커질수록 표면근방 100 nm 이내에서 격자손상이 증가하였다. 20 keV의 일정한 에너지로 B+이온을 $1{\times}10^{15}$, $3{\times}10^{15}/cm^2$ 조사량과 0.8 mA와 8 mA의 빔 전류로 각각 계산한 결과 조사량이 많아질수록, 빔 전류가 커질수록 표면 근방에 축적되는 격자손상의 양이 증가하였다. 이러한 에너지, 조사량과 빔 전류증가에 의한 시료표면의 격자손상 증가는 시료표면의 면저항을 감소시킨다.

• 한국항공운항학회지
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• 제18권4호
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• pp.21-29
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• 2010

The main purpose of this study is to obtain linear models for the design of automatic flight controller in order to operate the Light Sport Aircraft as unmanned air vehicle. Flight test equipments installed on the aircraft to acquire flight test data are described and maneuvers for practical speed calibration are introduced. Parameters for the linear models of lateral and longitudinal motion are estimated by the Output error method as well as trim data analysis using the flight test data. Simulated data using the estimated parameters is shown to agree well with the measurement data. Estimated parameters obtained for several flight conditions can be used to improve the aerodynamic database of the simulation program.

• 한국항공운항학회지
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• 제21권4호
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• pp.1-10
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• 2013

This paper addresses the derivation of 6-DOF equation of Tanker and Receiver's aircraft for aerial refueling. The new set of nonlinear equations are derived in terms of the relative translational and rotational motion of receiver aircraft respect to the tanker aircraft body frame. Further the wind effect terms due to the tanker's turbulence are included. The derivation of absolute dynamic equation for tanker aircraft written in the inertial frame is calculated from the relative dynamics equations of receiver. The derived relative and absolute equations are implemented the simulation in the same flight conditions to verify the relative motion and compare the trim results by using the MATLAB/SIMULINK program.

• Journal of Information Display
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• 제5권1호
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• pp.1-6
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• 2004

Ion shower doping with a main ion source of $P_2H_x$ using a source gas mixture of $PH_3/H_2$ was conducted on excimer-laser- annealed (ELA) poly-Si. The crystallinity of the as-implanted samples was measured using a UV-transmittance. The measured value of as-implanted damage was found to correlate well with the one calculated through/obtained from TRIM-code simulation. The sheet resistance was found to decrease as the acceleration voltage increased from 1 kV to 15 kV at a doping time of 1 min. However, it increases as the acceleration voltage increases under severe doping conditions. Uncured damage after furnace annealing is responsible for the rise in sheet resistance.

• 한국항해학회지
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• 제15권3호
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• pp.73-97
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• 1991

The analysis and investigation are described for White's[2] equations compared to the equations of Runeburg[3] and Milano[5] for continuous icebreaking mode, Tunik[8-1] and Ghoneim[8-2] for ramming icebreaking mode. Calculation results compare reasonably well with published model-scale and full-scale icebreaker data by Baker[1] and Dick[11]. During continuous and ramming mode operation, using characteristics of an incebreaker, down ward force on ice and standard ice thickness broken are predicted. Additionally draft, trim and extraction difficulty are also predicted. The bow part line of an icebreakin $g^{ply}$ vessel is designed aiming to maximize the ice breaking capabiltiy as following conditions-low bow angle[20 degrees] at designed waterline, small spread angle complement [6 degrees] at designed waterline, small spread angle complement [6 degrees] and high propeller thrust [220tons]. with plow, two reamers and wave type bumper.