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RISS 인기검색어
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- 저자 : 유인호 ( In Ho Yu ) (검색결과 114 건)
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FFS 모드에서 표면 엥커링에너지에 따른 전기광학특성의 연구
유인호,총첸신,장원근,이명훈,이승희,Yu, In-Ho,Zhong, Zhen-Xin,Jang, Won-Gun,Lee, Myong-Hoon,Lee, Seung Hee 한국전기전자재료학회 2005 전기전자재료학회논문지 Vol.18 No.11
Liquid crystal (LC) alignment using a photoalignment method by irradiation of polarized ultraviolet (UV) on an alignment layer has been investigated. Photoalignment method exhibits weaker anchoring energy than rubbing method so that we have studied electro-optic characteristics of fringe-field switching (FFS) mode with alignment layers using the photo and rubbing alignment methods. The cell using photo alignment layer shows lower threshold and operation voltage than those using rubbed alignment layer. Also, the former method shows higher transmittance than that of the latter.
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간척지에 플라스틱 온실 설치 시의 문제점 분석 및 개선방안
유인호,구양규,조명환,류희룡,문두경,Yu, In-Ho,Ku, Yang-Gyu,Cho, Myeong-Whan,Ryu, Hee-Ryong,Moon, Doo-Gyung 충남대학교 농업과학연구소 2014 Korean Journal of Agricultural Science Vol.41 No.4
Upon setting up a dedicated plastic greenhouse for tomato cultivation developed by the Rural Development Administration on the Gyehwa reclaimed land, this study was aimed at analyzing the problems can be occurred in the installation of plastic greenhouse on reclaimed lands as well as finding out solutions for improvement. A relatively cheaper wooden pile was used in the installation in order to supplement the soft ground conditions. Based on the results of ground investigation of the installation site, both the allowable bearing capacity and pulling resistance of the wooden pile with a diameter of 150 mm and a length of 10 m were computed and came out to be 30.645 kN. It was determined that the values were enough to withstand the maximum compressive force (17.206 kN) and the pullout force (20.435 kN) that are generally applied to the greenhouse footing. There are three problems aroused in the process of greenhouse installation, and the corresponding countermeasures are as follow. First, due to the slightly bent shape of the wooden pile, there were phenomenon such as deviation, torsion, and fracture when driving the pile. This could be prevented by the use of the backhoe (0.2) rotating tongs, which are holding the pile, to drive the pile while pushing to the direction of the driving and fixing it until 5 m below ground and applying a soft vibrating pressure until the first 2 m. Second, there exists a concrete independent footing between the column of the greenhouse and the wooden pile driven to the underground water level. Since it is difficult to accurately drive the pile on this independent footing, the problem of footing baseplate used to fix the column being off the independent footing was occurred. In order to handle with this matter, the diameter of the independent footing was changed from 200 mm to 300 mm. Last, after films were covered in the condition that the reinforcing frame and bracing are not installed, there was a phenomenon of columns being pushed away by the strong wind to the maximum of $11m{\cdot}s^{-1}$. It is encouraged to avoid constructions in winter, and the film covering jobs always to be done after the frame construction is completely over. The height of the independent footing was measured for 9 months after the completion of the greenhouse installation, and it was found to be within the margin of error meaning that there was no subsidence. The extent to the framework distortion and the value of inclinometers as well showed not much alteration. In other words, the wooden pile was designed to have a sufficient bearing capacity.
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유동팬이 설치된 온실 내 기류 및 기온분포 해석을 위한 CFD 모델 개발
유인호,윤남규,조명환,류희룡,문두경,Yu, In-Ho,Yun, Nam-Kyu,Cho, Myeong-Whan,Ryu, Hee-Ryong,Moon, Doo-Gyung 충남대학교 농업과학연구소 2014 Korean Journal of Agricultural Science Vol.41 No.4
This study was conducted to build the CFD simulation model which can quantify the distribution of the meteorological factors in air-heated greenhouse for chrysanthemum according to the location and capacity of air-circulation fan. The CFD model was also verified by experiment. It was judged that SST model was the most appropriate turbulence model which can properly describe the airflow by the air-circulation fan. According to the simulation results, the differences between the measured and predicted temperatures from 18 points at each height in the greenhouse were $0.2{\sim}0.4^{\circ}C$ in average. This showed a good agreement between the predicted data and the measured ones. The developed CFD model can be a useful tool to evaluate and design the air-circulation systems in the greenhouse with various configurations.
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돌아오지 못하는 아이들 - 유괴 삼부작을 통해 질문하는 우리시대 정신분석의 윤리-
유인호 ( Yu¸ In-ho ) 동국대학교 영어권문화연구소 2011 영어권문화연구 Vol.4 No.1
The purpose of Lacan psychoanalysis is not in enlightening level which complements an unstable ego repletely who can not adjust to the community. Ultimately psychoanalysis suggests that a subject accept that it can not make up for the lack of man, neither should it. This is the ethics of psychoanalysis, and Lacan tried to suggest this psychoanalysis as ethics several times. This paper analyzes lately released Korean movies, which deals with the child kidnapping in the ethics of psychoanalysis based on the formula of sexual difference arising from the seminar in 1975. The psychoanalytic ethics from this formula presents that a woman accepts that there exists no signifier which makes her a stable being as a female position unlike a male one. Parents in the three movies choose a male position to stay in the location of signifier as a parent. For this, they mourn the death, escape from their lack ceaselessly or transgress the law for themselves to be a legislator. This shows the position of the parent in korea, which can manage barely as an unstable one by avoiding some truth, becomes a symptom. Therefore, we could know that what modern korean society has been built from, that is the location of the signifier as a parent and the one of subject facing up to its lack. In the conclusion, we can turn over a ethical being, thereby bringing the situation of the choice again.
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DC정합회로를 갖는 능동 Replica LDO 레귤레이터
유인호(Ryu, In-Ho),방준호(Bang, Jun-Ho),유재영(Yu, Jae-Young) 한국산학기술학회 2011 한국산학기술학회논문지 Vol.12 No.6
본 논문에서는 DC 정합회로를 갖는 능동 Replica LDO 레귤레이터에 대하여 나타내었다. Replica단과 출력 단의 DC전압을 정합하기 위하여 DC정합회로를 설계하였다. 능동 Replica LDO 레귤레이터의 PSR특성은 일반적인 레귤레이터 보다 큰 값을 가질 수 있다. 설계된 DC정합회로는 Replica 레귤레이터에서 발생할 수 있는 단점을 줄여 준다. 또한 전체회로를 능동회로로 설계함으로써 칩면적을 줄이고 수동저항을 사용할 때 발생하는 열잡음을 제거할 수 있다. 0.35um CMOS 파라미터를 사용하여 HSPICE 시뮬레이션한 결과, DC정합회로를 이용하여 설계된 레귤레이 터의 PSR특성은 -28dB@10Hz로써 DC정합회로를 사용하지 않는 일반적인 레귤레이터의 -17dB@10Hz보다 개선될 수 있음을 확인하였다. 레귤레이터의 DC출력 전압은 3V이다. In this paper, an active replica Low-dropout(LDO) regulator with DC voltage matching circuit is presented. In order to match the voltage between replica and output of regulator, DC voltage matching circuit is designed. The active replica low dropout regulator has higher Power Supply Rejection(PSR) than that of conventional regulator. The designed DC voltage matching circuit can reduce the drawback that may be occurred in replica regulator. And using fully active element in regulator can reduce the chip area and heat noise with resistor. As results of HSPICE simulation with 0.35um CMOS parameter, the designed active replica LDO regulator achieves Power Supply Rejection, -28@10Hz better than -17@10Hz of conventional replica regulator without DC matching circuit. And the output voltage is 3V.
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순환팬이 온풍난방 온실의 기상분포 균일화에 미치는 영향
유인호(In Ho Yu),조명환(Myeong Whan Cho),이시영(Si Young Lee),전희(Hee Chun),이인복(In Bok Lee) (사)한국생물환경조절학회 2005 생물환경조절학회지 Vol.14 No.2
이 연구는 순환팬에 의해 만들어지는 수평적인 공기 흐름이 환경요인들의 수평 및 수직분포에 미치는 영향을 조사하기 위해 수행하였다. 순환팬 가동 유무에 따라 기류 속도, 기온, 상대습도 및 CO₂ 농도의 3차원 분포를 측정하였다. 온실내 기상인자 분포의 균일성은 외기온이 낮아짐에 따라 감소하였다. 무처리시 기온 편차는 4.7, 습도 편차는 19%이었는데 팬을 가동한 경우 그 편차들은 각각 2.2, 6.3%로 감소하였다. 팬 용량이 증가할수록 측점간 기온 편차가 줄어들었는데, 온실 바닥면적당 0.0104㎥ 용량의 팬으로 온실내 적정한 공기 유동을 만들 수 있었다. 기온 및 CO₂ 농도의 수직분포는 높이나 팬 용량에 관계없이 상당히 균일한 것으로 나타났다. 폭 방향의 기온 편차를 줄일 수 있는 팬 배치와 소용량의 팬을 다수 설치했을 때의 효과에 대한 연구가 더 필요할 것으로 생각된다. This study was conducted to investigate the effects of horizontal air flow produced by circulation fans on horizontal and vertical profiles of meteorological factors. The three-dimensional distributions of air speed, air temperature, relative humidity and carbon dioxide (CO₂) concentration were measured with and without the fans in operation. The uniformity of the spatial distribution of meteorological factors decreased as the outside air temperature decreased. In "fans off" condition, spatial variations of 4.7℃ in air temperature, 19% in relative humidity were detected. When the fans were operated, these variations were reduced to 2.2 and 6.3%, respectively. As the fan capacity increased, the difference in air temperature among sampling points decreased. The fan capacity of 0.0104 ㎥ㆍs?¹ㆍm?² was enough to obtain a reasonable air flow in greenhouse. The vertical profiles of air temperature and CO₂ concentration were reasonably uniform regardless of measurement height and fan capacity. Further researches on the position of fans to reduce the difference in air temperature along the width and the effects of using a larger number of smaller fans are required.
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