• 한국정밀공학회지
• /
• 제29권11호
• /
• pp.1164-1169
• /
• 2012

This paper presents a study of an integrated infrared (IR) photo sensor for display application. We fabricated hydrogenated amorphous silicon thin film transistor (a-Si:H TFT) and hydrogenated amorphous silicon germanium thin film transistor (a-SiGe:H TFT) which were bottom gate structure. We investigated the dependence of a-SiGe:H TFT characteristics on incident wavelengths. We proposed photo sensor which responded to wavelengths of IR region. Proposed pixel circuit of photo sensor was consists of switch TFT and photo TFT, and one capacitor. We developed integrated photo sensor circuit and investigated the performance of the proposed sensor circuit according to the input wavelengths. The developed photo sensor circuit with a-SiGe:H TFT was suitable for IR.

• 한국방송∙미디어공학회:학술대회논문집
• /
• 한국방송∙미디어공학회 2018년도 추계학술대회
• /
• pp.29-32
• /
• 2018

본 논문에서는 IR-UWB(Impulse-Radio Ultra Wideband) 레이더와 서보 모터를 이용한 실내 환경의 물체 위치(거리, 각도) 탐지 방법을 제안한다. 기존의 카메라나 적외선을 사용한 기술은 비용이 비싸고 장애물이 있을 시 측정이 어려워 정확도가 떨어지는 단점을 가지고 있다. 반면 IR-UWB 레이더는 저 전력, 저 가격, 소형으로 구현이 가능하고 광대역을 사용하여 투과성이 좋다는 장점을 가져 실내 환경의 물체 움직임 탐지에 적합하다. 하지만 IR-UWB 레이더를 이용한 물체 탐지 시 각도 측정 없이 거리만을 측정하기 때문에 물체의 정확한 위치를 탐지할 수 없다. 이러한 점을 보완하고자 레이더를 모터 위에 설치하고 모터를 180 도 회전시키는 방법을 사용함으로써 넓은 측정 범위를 가짐과 동시에 물체의 위치를 보다 정확히 탐지해내는 결과를 보였다.

• Asian-Australasian Journal of Animal Sciences
• /
• 제16권1호
• /
• pp.6-10
• /
• 2003

The present study investigated peripheral plasma immunoreactive inhibin (ir-inhibin) concentrations in relation to the stage of oestrous cycle and progesterone concentrations in cycling Sahiwal cattle (Bos indicus) and Murrah buffaloes (Bubalus bubalis). Blood samples were collected once daily for thirty-two consecutive days from cattle and buffaloes (5 each) during winter months of January and February. Mean (${\pm}$S.E.M.) plasma ir-inhibin concentrations ranged from $0.40{\pm}0.01$ to $0.59{\pm}0.03ng/ml$ in cattle and from $0.29{\pm}0.03$ to $0.52{\pm}0.05ng/ml$ in buffaloes. In cattle, ir-inhibin concentrations increased from $0.47{\pm}0.07ng/ml$ on day -4 (day 0=day of oestrus) to reach a maximum value of $0.59{\pm}0.03ng/ml$ on day -2. Thereafter, ir-inhibin concentrations showed a decline to reach a low of $0.40{\pm}0.01ng/ml$ on day 11 of the oestrous cycle. In buffaloes, ir-inhibin concentrations increased from $0.38{\pm}0.04 ng/ml$ on day -4 to reach a maximum concentration of $0.52{\pm}0.05ng/ml$ on day -2. Ir-inhibin concentrations then declined to reach a low of $0.29{\pm}0.03ng/ml on day 9 of the cycle. In both cattle and buffaloes, ir-inhibin concentrations which were lowest ($0.43{\pm}0.02$ and $0.34{\pm}0.02ng/ml$, respectively) during the mid-luteal phase of the oestrous cycle increased (p<0.05) to $0.52{\pm}0.03$ and $0.44{\pm}0.04ng/ml$, respectively, during the late luteal phase, and then further to the highest value of $0.53{\pm}0.02$ and $0.49{\pm}0.04ng/ml$, respectively, during the perioestrus phase, following which these declined to $0.50{\pm}0.02$ and $0.39{\pm}0.03ng/ml$, respectively, during the early luteal phase. The variations in peripheral plasma ir-inhibin profile in both the species appear to be related to the changes in characteristics of follicular populations during the oestrous cycle. Peripheral plasma ir-inhibin concentrations were negatively correlated with progesterone concentrations in cattle (r=-0.51, p<0.01) and buffaloes (r=-0.30, p<0.01) indicating that the corpus luteum is not a source of peripheral ir-inhibin in these species.

• 한국토양비료학회지
• /
• 제5권2호
• /
• pp.65-74
• /
• 1972

IR667의 낮은 등숙률요인(登熟率要因)을 밝히고자 재식밀도(栽植密度)와 질소수준(窒素水準)만을 달리하여 $5m^2$시멘트 pot IR667-수원(水原) 214와 진흥(振興)을 재배(栽培)하여 등숙구조(登熟構造)와 이의 생리적(生理的) 기능(機能)을 비교검토(比較檢討)하여 다음 결과(結果)를 얻었다. 1. IR667의 등숙률(登熟率)은 64로 진흥(振興)의 85보다 훨씬 낮으나 수량(收量)은 IR667이 790kg/10a로 진흥(振興)의 760kg보다 높았다. 2. 출수후(出穗後) 10일(日)의 NAR당(當) 등숙립수(登熟粒數)가 IR667은 6,490으로 진흥(振興)의 6,360보다 약간커서 IR667의 천립중(千粒重)은 29.9로 진흥(振興)의 31.2보다 적으며 NAR당(當) 총립수(總粒數)는 IR667이 10,530으로 진흥(振興)의 7,290보다 훨씬 높아 이것이 IR667의 등숙률(登熟率)이 낮은 요인(要因)이었다. 3. 투광상수(透光常數)는 IR667이 0.115로 진흥(振興)의 0.200보다 적어서 IR667이 보다 큰 등숙구조(登熟構造)를 갖게되는 장점(長點)을 보였다. 4. LAI 증가(增加)에 따른 LAI당(當) 입수(粒數)의 감소율(減少率)은 두 품종(品種)이 같았다. 5. 기초생산속도(基礎生産速度)(CGR)가 최고치(最高値)인 감계엽면적지수(監界葉面積指數)(critical leaf area index)는 IR667은 6.5이고 진흥(振興)은 5.2이며 5.2이하(以下)에서 진흥(振興)의 NAR이 IR667 보다 크다. 6. 최고수량(最高收量)을 얻을수 있는 출수기(出穗期) 최적엽면적지수(最適葉面積指數)(optimum leaf area index)는 IR667이 7.4로 진흥(振興)의 6.2보다 컸다. 출수기(出穗期) 평균엽면적지수(平均葉面積指數)는 IR667이 6.2 진흥(振興)이 4.7로 최적엽면적지수(最適葉面積指數)에 미달(未達)일 뿐 아니라 감계엽면적지수(監界葉面積指數)보다도 적었다. 7. 출당후(出糖後) 20일간(日間) LAI의 감소율(減少率)은 IR667이 크나 광합성량(光合成量)의 감소율(減少率)은 진흥(振興)이 컷다. 8. LAI가 클수록 NAR이 감소(減少)하는데 그 감소율(減少率)은 등숙(登熟)이 진행(進行)됨에 따라 진흥(振興)에서는 감소(減少)하나 IR677에서는 증가(增加) 함은 저온(低溫)에 의(依)한 광합성능(光合成能)의 저하(低下)와 호흡소모(呼吸消耗)에 기인(基因)하며 등숙적온(登熟適溫)이 IR667에서 높다는 것을 의미(意味)한다. 9. 수량(收量)-등숙률곡선(登熟率曲線)은 IR677이 진흥(振興)보다 등숙(登熟)이 수량(收量)에 미치는 영향이 적은 것으로 나타났고 이는 등숙환경(특히 기온)이 IR667에 부적(不適)한 때문으로 등숙환경(登熟環境)개선은 IR667의 최대 증수요인임을 보였다.

• 대한의생명과학회지
• /
• 제15권1호
• /
• pp.25-29
• /
• 2009

The changes on the regional distributions and frequencies of somatostatin-immunoreactive (IR) cells in the fundus and pylorus of the stomach of osteoporotic Sprague-Dawley rats induced by ovariectomy were studied by immunohistochemical methods. The experimental animals were divided into two groups, one for non-ovariectomized group (Sham) and the other for ovariectomized group (OVX). Samples were collected from the fundus and pylorus regions at the 10 th week after ovariectomy or sham-operation. Somatostatin-IR cells were observed in both regions of the stomach regardless of ovariectomy. Most of these IR cells in the mucosa of the fundus or pylorus were generally spherical or spindle in shape (open type cell) while cells found in the gastric gland regions were round in shape (close type cell). Significantly lower number (P<0.01) of somatostatin-IR cells were detected in OVX as compared with Sham in the fundus and pylorus. In the present study, the density of somatostatin in the stomach was markedly decreased. Therefore, these changes in density of somatostatin-IR cells detected in this study may support the speculation that the development of gastrointestinal symptoms in osteoporosis such as impairments of calcium and some lipids, frequently encountered in patients with postmenopausal osteoporosis because the changes in gastrointestinal endocrine density would reflect the change in the capacity of producing these hormones and regulating gut motility and digestion.

• 한국육종학회지
• /
• 제43권5호
• /
• pp.391-398
• /
• 2011

Physiological responses to salinity stress were evaluated in six rice genotypes differing in their tolerance to salinity at the seedling stage. Susceptible genotypes ('Dongjingbyeo', 'Hwayeongbyeo', and 'IR29') showed salt injury symptoms (mean 8.8) and higher visual score under salt stress than that of tolerant ones ('Pokkali', 'IR74009', and 'IR73571'). As salinity affects growth and physiological parameters, the six genotypes thus showed significant reduction because of salt stress. Tolerant Japonica/Indica bred lines ('IR74009', 'IR73571') showed lower reduction, 33.9%, 34.5%, and 50%, respectively, in plant seedling height, dry shoot weight and dry root weight than those of the susceptible Japonica varieties ('Dongjingbyeo', 'Hwayeongbyeo'), and the highest reduction under salt stress was observed in dry root weight, followed by dry shoot weight and seedling height, respectively. Shoot $Na^+$ concentration of IR74099 and IR73571 was lower than that of the susceptible varieties, 'Dongjinbyeo' and 'Hwayeongbyeo'. There were no significant differences among genotypes in root $Na^+$ concentration. Shoot $K^+$ concentration showed a reverse tendency compared to shoot $Na^+$ concentration. IR74009 and IR73571 had considerably lower ratio compared to 'Dongjinbyeo' and 'Hwayeongbyeo' in $Na^+/K^+$ ratio of their shoot and was not different the tolerant check, 'Pokkali'.

• 대한화학회지
• /
• 제40권10호
• /
• pp.656-662
• /
• 1996

저온상압법에 의해 Si/Al의 비가 100정도되는 ZSM-5를 합성하였으며 시간 경과에 따른 결정화과정을 $^{27}Al$ 및 $^{29}Si$ MAS NMR spectea 및 FT-IR로 고찰하였다. 저온상압 하에서 합성한 결과 초기 반응물질 및 성분비에 따라 화학적 이동은 기종의 연구와는 다른 경향을 보였으나 반응이 진행됨에 따라 최종 생성물의 화학적 이동은 전형적이 ZSM-5 영역에서 나타나고 있음을 확인하였다. 그리고 국부결함은 소성에 의해 제거되었으며 최종생성물의 XRD 및 SEM의 결과에서도 합성된 물질이 ZSM-5임을 확인하였다.

• 한국작물학회지
• /
• 제43권4호
• /
• pp.234-238
• /
• 1998

To select new germplasm for salinity tolerance from new plant type (NPT) breeding lines, the sixty F$_4$ lines selected from the crosses between Korean cultivars and IRRI's NPT lines were evaluated for salinity tolerance at the seedling stage with salinized culture solution (EC=12 dS/m) in the controlled conditions. Two NTP lines derived from a cross between 'Ilmibyeo' and 'IR66152-AC5-1', 'HR15258-7-1' and 'HR15258-27-1', were found to have good tolerance. The salinity tolerance of the lines was compared to their parents and the sensitive ('IR29') and tolerant ('Pokkali') checks in three salinity levels, no salinity (control) and an EC of 12 and 16 dS/m. Visual salinity score, shoot Na+ and Na-K ratio in two NPT lines was significantly low compared with the parents and IR29. Indicating that salinity tolerance of the lines might be derived from a transgressive segregation. The relative water content of the lines was higher than Pokkali, and the dry weight of shoot and root was proportionally decreased to salinity score and salinizing concentration. The visual salinity scores were significantly correlated with shoot Na concentration, Na-K ratio, relative water content, and reduction of dry weight (P<0.01). Their tolerance was attributed to root and shoot characteristics that led to high shoot water content, thus diluting the toxic effect of salts.

• 천문학회지
• /
• 제29권spc1호
• /
• pp.403-404
• /
• 1996

This paper describes a plan of a new IR phace-shfting interferometric system for testing astronomical aspheric mirror which has big departure from the best fit reference sphere during fine grinding. In this experimental system, some new technology will be adopted. The accuracy of system can reach $\lambda$/40($\lambda$=10.6${\mu}m$)

• 한국염색가공학회지
• /
• 제3권3호
• /
• pp.29-33
• /
• 1991

Some ir absorbing nickel complex dyes were synthesized by the reaction of phenylene diamines, 2-aminobenzenethiols and 2-aminobenzene selenols, tetrathiols with nickel (II) chloride. These dyes absorbed ir light, but those from phenylene diamines absorbed at 780-800 nm which is the most favorable wavelength region for semiconductor laser optical recording dye medium.