• 반도체디스플레이기술학회지
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• 제17권4호
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• pp.32-36
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• 2018

For various oxygen($O_2$) to argon(Ar) gas ratio, aluminum-doped zinc oxide(AZO) films were deposited for 3 min at different duty ratio by changing reverse pulse times. As the duty ratio increased, the thickness of the AZO film decreased and the sheet resistance increased. It can be concluded that When sputtering AZO Thin film, oxygen interfered with sputtering. When the reverse time was increased, the thickness of AZO was proportional to the real sputtering time and decreased. From the optical transmittance and sheet resistance, it was possible to obtain a higher figure of merits of AZO at a lower reverse pulse time. Even at the short reversed pulse time, it can be concluded that the accumulated charges on the AZO target are completely cleared. At a lower reverse pulse time, pulsed-DC sputtering of AZO is expected to be used instead of DC sputtering in the deposition of transparent conductive oxide(TCO) films without any degradation in thickness and structural/electrical characteristics.

• 지구물리와물리탐사
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• 제10권2호
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• pp.111-123
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• 2007

본 논문에서는 파동장 외삽(wavefield extrapolation)의 방향을 단순히 역시간(reverse time)으로 하여 적용하는 기존의 역시간 구조보정법(reverse time migration method)이 아닌, 묵시적으로 가정된 순방향 모델링(forward modeling) 연산자에 대한 정확한 어드조인트(adjoint) 연산자로서의 역시간 구조보정 연산자를 유도한다. 어드조인트 연산자를 얻는 방법으로는 우선 해당하는 순방향 연산자를 명시적인 행렬식의 형태로 정의하고 이에 대한 전치행렬식을 구한 후, 이러한 전치행렬식에 해당하는 연산자를 정의하는 접근법을 사용하였다. 정확한 어드조인트 관계에 있는 역시간 구조보정 연산자는 기존의 역시간 구조보정 연산자와 마찬가지로 구조보정의 목적으로 사용될 수 있을 뿐 아니라, 최소자승 구조보정(Least-squares migration)과 같은 역산을 통해서 지하구조 영상화를 할 때 필요로 하는 어드조인트 연산자를 정확하게 구현 할 수 있어 보다 정확한 역산 결과를 얻게 해준다.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2014년도 추계학술발표대회
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• pp.849-852
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• 2014

Reverse engineering of gene regulatory network is a challenging task in computational biology. To detect a regulatory relationship among genes from time series data is called reverse engineering. Reverse engineering helps to discover the architecture of the underlying gene regulatory network. Besides, it insights into the disease process, biological process and drug discovery. There are many statistical approaches available for reverse engineering of gene regulatory network. In our paper, we propose pairwise mutual information for the reverse engineering of a gene regulatory network from time series data. Firstly, we create random boolean networks by the well-known $Erd{\ddot{o}}s-R{\acute{e}}nyi$ model. Secondly, we generate artificial time series data from that network. Then, we calculate pairwise mutual information for predicting the network. We implement of our system on java platform. To visualize the random boolean network graphically we use cytoscape plugins 2.8.0.

• 한국식품과학회지
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• 제17권3호
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• pp.208-212
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• 1985

이륜형 식품 압출기에서 체류시간의 분포에 대한 reverse screw element의 효과를 보기 위하여 여러가지 screw 조합에 따른 체류시간의 분포를 실험적으로 평가 하였다. Forwarding screw에서 형성된 C. chamber의 수를 평가하기 위해 아래와 같은 model equation을 도출 하였다. $T=T_x+\frac{1}{x}(\sum\frac{l}{a}+\frac{V{\cdot}\rho}{F/x})$ Reverse screw element를 사용함으로써 체류시간 분포 곡선은 넓게 퍼지는 경향이 있었고 최대 peak에 도달하는 시간이 증가 하였다. True residence time은 die 바로 앞에 있는 reverse screw element에 의해 주로 영향을 받았다. Filled C-chamber의 수는 같은 형태의 screw조합에서는 screw 회전수가 증가함에 따라 감소하였다.

• 대한소아치과학회지
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• 제26권1호
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• pp.32-37
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• 1999

항시 장착이 가능한 reverse twin block 장치에 기능의 장애를 받지 않고도 lip pad의 효과를 첨가하기 위하여 가철식으로 lip pad를 제작하여 III급 부정교합의 치료에 적용해 본 결과 다음과 같은 결론을 얻었다. 1. Reverse twin block 장치는 장착한 상태에서 lip pad의 착탈을 통하여 정상적인 저작, 발음 등의 기능을 할 수 있으며 심미적이므로 III급 부정교합의 치료에 있어 상하악이 분리되어 있지 않은 다른 기능성 장치가 가진 단점을 극복할 수 있었다. 2. 본 증례에서는 저발육된 상악에 대한 효과적인 작용을 하는 lip pad를 가철식으로 제작하여 기능의 장애를 받지 않고도 양호한 치료효과를 얻을 수 있었다.

• 터널과지하공간
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• 제26권4호
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• pp.253-265
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• 2016

본 연구에서는 reverse RFID 시스템을 이용하여 지하광산 현장에 투입되는 장비들의 이동시간을 측정하였다. Reverse RFID 시스템에서는 리더기와 안테나가 광산 장비에 탑재되며 태그는 지하광산의 갱도에 부착된다. 실내 모사실험을 통해 장비에 설치되는 RFID 리더기의 송출 전력 크기에 따라 상이하게 나타나는 태그 인식범위와 태그 인식률의 변화를 파악하였다. 그 결과 리더기의 송출 전력 크기가 작아질수록 태그 인식 범위가 좁아져 정밀한 이동시간 측정이 가능해졌으나, 태그 인식률은 떨어지는 것을 확인할 수 있었다. 현장실험 결과 본 연구에서 사용한 RFID 장비의 경우 송출 전력을 28 dBm으로 설정하는 것이 태그의 인식률을 유지하면서 측정오차를 줄일 수 있는 것으로 나타났다. 또한, 현장 실험 결과를 통해 reverse RFID 시스템이 지하광산에서 운반 트럭의 이동시간 측정자료 수집을 위해 성공적으로 사용될 수 있음을 확인할 수 있었다.

• 대한금속재료학회지
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• 제50권6호
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• pp.413-418
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• 2012

This study was carried out to investigate the effect of reverse transformation on the mechanical properties in high manganese austenitic stainless steel. Over 95% of the austenite was transformed to deformation-induced martensite by 70% cold rolling. Reverse transformation became rapid above an annealing temperature of $550^{\circ}C$, but there was no significant transformation above $700^{\circ}C$. In addition, with an increasing annealing time at $700^{\circ}C$, reverse transformation was induced rapidly, but the transformation was almost completed at 10 min. There was a rapid decrese in strength and hardness with annealing at temperature above $550^{\circ}C$, while elongation increased rapidly above $600^{\circ}C$. At $700^{\circ}C$, hardness and strength decreased rapidly, and elongation increased steeply with an increasing reverse treatment time up to 10 min, whereas there were no significant change with a treatment time after 10 min. The reverse-transformed austenite showed an ultra-fine grain size less than $0.2{\mu}m$, which made it possible to strengthen the high manganese austenitic stainless steel.

• 한국전기전자재료학회논문지
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• 제19권3호
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• pp.216-221
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• 2006

Lifetime control technique by proton implantation has become an useful tool for production of modern power devices. In this work, punch-through type diodes were irradiated with protons for the high speed power diode fabrication. Proton irradiation which was capable of controlling carrier's lifetime locally was carried out at the various energy and dose conditions. Characterization of the device was performed by current-voltage, capacitance-voltage and reverse recovery time measurement. We obtained enhanced reverse recovery time characteristics which was about $45\;\%$ of original device reverse recovery time and about $73\;\%$ of electron irradiated device reverse recovery time. The measurement results showed that proton irradiation technique was able to effectively reduce minority carrier lifetime without degrading the other characteristics.

• 대한자원환경지질학회:학술대회논문집
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• 대한자원환경지질학회 2002년도 춘계 공동학술발표회
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• pp.156-158
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• 2002

Reverse-time migration has no dip limitations and one of the most promising methods to preserve true amplitudes. We applied 3-D prestack reverse time migration based on a pseudo-spectral implementation of the acoustic wave equation to the SEG/EAGE salt dome synthetic data set. We were able to illuminate sub salt reflectors of the SEG/EAGE salt model that were barely observable in the Kirchhoff migration images. Using the pseudo-spectral modeling technique, we could implement reverse-time migration within the core memory, which could be equipped to a personal computer.

• 동력기계공학회지
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• 제16권4호
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• pp.60-65
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• 2012

This study was carried out to investigate the effect of reverse transformation on the damping capacity in high manganese austenitic stainless steel. ${\alpha}^{\prime}$-martensite was formed with the specific direction and surface relief by deformation. Over 95% of the austenite phase was transformed to deformation-induced ${\alpha}^{\prime}$-martensite by 70% cold rolling. Reverse transformation became rapid above an annealing temperature of $550^{\circ}C$, but there was no significant transformation above $700^{\circ}C$. In addition, with increasing annealing time at $700^{\circ}C$, reverse transformation was induced rapidly, but the transformation was almost completed at 10 min. Damping capacity was increased up to $700^{\circ}C$, and than unchanged with the increasing annealing temperature. Damping capacity increased steeply with an increasing reverse treatment time up to 10min, whereas there were no significant change with a treatment time of more than 10 min. Damping capacity increased with an increasing the reversed austenite and was strongly affected by reversed austenite.