• 한국항공운항학회지
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• 제14권2호
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• pp.9-16
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• 2006

FAA AC120-40B Level D flight dynamics model for T-50 Full Mission Trainer was successfully developed. Since AC120-40B Level D requires the quantitative validation tests for simulation model compared with flight test data, T-50 flight test data for each validation test item was gathered, and also automatic test environments which include AFT (Automatic Fidelity Tester) and STA (Simulation Test Analyzer) were developed. The final test results after the iterative test-tuning processes were all within the tolerances specified in AC120-40B Level D. Qualification Test Guide, QTG contains the detail test processes and results.

• 항공우주시스템공학회지
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• 제3권1호
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• pp.1-5
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• 2009

The flight control of the T-50 advanced trainer is conducted by the digital FBW (Flight-by-Wire) control system. The system input data consist of flight conditions such as altitude, airspeed, and angle of attack. And the flight conditions of the aircraft are obtained from IMFP (Integrated Multi-Function Probe). The T-50 aircraft equip three IMFP sensors. To ensure reliability in flight condition data obtained from each IMFP sensor, the mean value of flight conditions is used as the input of the control system. In this study, the effect of an installation angle of IMFP sensors on estimation of flight altitude was investigated by flight test results in the supersonic region.

• 항공우주시스템공학회지
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• 제2권2호
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• pp.42-45
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• 2008

Under the non-operating exposure condition in the hot area, the T-50 cockpit temperature is expected over the requirement according to T-50 environmental criteria. So it is necessary to protect the cockpit from the high temperature condition during the non-operating exposure because the high temperature of the cockpit may result in the cockpit equipment malfunction. In this study, the transparency coating is selected as the method for protecting the cockpit from the high temperature exposure and analyzed the effect on the cockpit heat load attenuation. Some kinds of cockpit coating were reviewed and selected and the analysis was performed about the effect before and after coating application under 1% hot day condition based on the T-50 FSD hot soaking test data. The result of analysis show transparency coating is so effective to attenuate the heat load of T-50 cockpit.

• 제어로봇시스템학회논문지
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• 제14권6호
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• pp.580-586
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• 2008

Icing cloud generation system was developed to perform the in-flight icing simulation test for T-50 Supersonic Jet Trainer on the ground. The developed system successfully generated the almost natural icing cloud in the super-cooled state (liquid state) below freezing point and with the required LWC (Liquid Water Content). For full-scale aircraft icing test, an icing scaling method was adopted due to the limitation of wind generation speed with open-circuit type blower and its applicability was experimentally verified. Under the required in-flight icing condition based on the icing scaling method, T-50 aircraft subsystems were successfully operated and functionally checked.

• 생물환경조절학회지
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• 제12권3호
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• pp.132-138
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• 2003

섬쑥부쟁이의 대량번식 체계를 구명하고 발아 및 입 묘율 향상을 위한 기초 자료를 얻기 위해 온도와 광조건, 그리고 priming 처리약제, 처리농도, 처리기간이 발아에 미치는 영향에 대하여 실험한 결과는 다음과 같았다. 온도에 따른 발아율은 20, 25$^{\circ}C$ 처리구가 가장 높았으며 30$^{\circ}C$에서 발아율이 급격히 낮아졌고 35$^{\circ}C$에서는 전혀 발아하지 않았다. 발아개시일은 15$^{\circ}C$에서 가장 늦어졌으며 온도가 높아질수록 빨라지는 경향을 보였으나 높은 온도에서는 쉽게 부패하였다. 발아세는 25$^{\circ}C$에서 가장 높게 나타났으며 15, 20, 30$^{\circ}C$ 순으로 낮이졌다. 굉조건 실험에서 발아율, 발아개시일, 발아세, $T_{50}$ 등이 명 처리에서 증진되는 경향을 보였으나 유의 차는 없었다 Priming 처리기간별로 발아율을 보면 평균적으로 3 시간 처리가 30 분처리보다 높았다. 섬쑥부쟁이 종자에 0.3M $KNO_3+K_3PO_4$를 3시간 처리할 경우 발아율이 83.3%로 가장 높았고 역시 $T_{50}$도 가장 짧았다. $T_{50}$과 발아개시일은 30분 처리가 3시간 처리보다 좋은 결과를 보였으며 모든 priming 처리가 대조구보다 좋은 결과를 보였다. 발아세는 모든 처리가 대조구보다 높았으나 처리시간에 따른 효과가 없었다.

• Toxicological Research
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• 제16권2호
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• pp.173-178
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• 2000

This study was carried out to investigate cytotoxicity of several herbicides (Bentazone, Butachlor. Paraquat and Ethalfluralin) in cultured mouse NIH 3T3 fibroblasts. Tetrazolium (MTT), neutral red (NR) and sulforhodamine protein B (SRB) of the colorimetric assays were performed to evaluate the cytotoxicity on cell organelles. 2 x 10$^4$cell/$m\ell$ of NIH 3T3 fibroblast in each well of 24 multidish were cultured. After 24 hours, the cells were treated with solution (1, 25, 50 or 100 $\mu$M) of each herbicide. After the NIH 3T3 fibroblasts of all groups were cultured in the same condition for 48 hours, MTT, NR and SRB assays were performed to evaluate the cytotoxicity. The light microscopic study was carried out to examine morphological changes of cultured NIH 3T3 fibroblasts. The MTT$_{50}$ of Bentazone, Butachlor, Paraquat and Ethalfluralin were 1560.97 $\mu$M, 56.15 $\mu$M, 3138.81 $\mu$M and 1301.82 $\mu$M, respectively. The NR$_{50}$ of Bentazone, Butachlor. Paraquat and Ethalfluralin were 1763.93 $\mu$M, 45.98 $\mu$M, 1030.85 $\mu$M and 1808.29 $\mu$M, respectively. The SRB$_{50}$ of Bentazone, Butachlor. Paraquat and Ethalfluralin were 1913.38 $\mu$M, 65.30 $\mu$M, 1860.73 $\mu$M and 1086.93 $\mu$M, respectively. The morphological changes of NIH 3T3 fibroblasts showed severe degeneration in Butachlor 50 $\mu$M and 100 $\mu$M concentrations. These results indicate that Butachlor has high cytotoxicity, Bentazone, Paraquat and Ethalfluralin very weak cytotoxicity against NIH 3T3 fibroblasts.lasts.

• 전자공학회논문지A
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• 제29A권11호
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• pp.106-112
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• 1992

In this paper, we analyze the structure characteristics of $As_{40}Se_{50-x}S_{x}Ge_{10}$ system bulk and thin films. As the results of XRD patterns, it identified amorphous state. In order to find the glass transition temperature($T_g$), crystallization($T_c$) and melting point ($T_m$)of bulk sample, it ascertained that TS1gT is 238$^{\circ}C$ in $As_{40}Se_{15}S_{35}Ge_{10}$, and 231$^{\circ}C$ in $As_{40}Se_{25}S_{25}Ge_{10}$ & $As_{40}Se_{50}Ge_{10}$ following the thernal analysis by DSC, DTA, & TGA method. Also it was confirmed the phase seperation of continuous phase and dispertion phase by the optical texture of polarizing microscope and $T_g$ near 20$0^{\circ}C$ in thin film. Therefore, it was found that it occurs the phase seperation of Ge-rich dontinuous phase and Se-rich dispersion phase following the EDS analysis of thin film and the surface SEM photograph.

• Radiation Oncology Journal
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• 제3권2호
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• pp.131-136
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• 1985

성문암은 술, 담배가 주 원인적 인자로 밝혀져 있다. 성문암은 쉰목소리 등으로 조기발견이 용이하며 대부분 분화도가 좋은 편평상피암이고 해부학적 위치상 조직생검 및 치료경과 관찰이 용이하며, 성운에는 임파절이 없으므로 전이가 적다. 국소 치료인 방사선치료와 수술이 치료의 주종을 이루며 방사선치료는 음성보전 측면에서 효과적이므로 초기병변에는 방사선치료를 진행된 병변의 경우 수술 혹은 수출 및 방사선 복합요법을 사용하고 있다. 저자들은 1979년 3월부터 1982년 9월까지 서울대학교병원 치료방사선과에서 성문암으로 치료받은 환자들을 추적 조사하여 다음과 같은 결과를 얻었다. 1. 방사선치료 후 3년 무병 생존율이 $T_1N_0 :\;78\%T_1N_0;\;60\%T_3N_0:\;50\%$, 2 구제적 수술후 3년 무병생존율이 $T_1N_0 :\;89\%T_2N_0;\;80\%T_3N_0:\;50\%$ 3. 재발은 대개 3년 이내에 하였다.

• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 2005년도 추계학술발표대회 논문집
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• pp.1-21
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• 2005

• 시스템엔지니어링워크숍
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• 통권6호
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• pp.153-156
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• 2005