조선후기에 "카메라 옵스큐라"로 초상화를 그렸다 -정조 시절 정약용의 증언과 이명기의 초상화법을 중심으로

이태호 ( Tae Ho Lee ) 다산학술문화재단 2005 다산학 Vol.- No.6

Tasan put camera obscura which is a perspective of the pin-hole camera to the test and testimony in 1987, and there is a possibility of using in the portrait paintings drawn by Lee Myunggi. The fact that Lee drew portrait paintings using camera obscura would be just a hypothesis until the real documents come out. However the portrait paintings made by Lee having a expression of a three-dimentional effect on corrugation, taking a pose exposed hands, and handling oblique lines on the floor similar to perspective, have a new change by something external. At a guess the thing changed Lee`s art of drawing would be the influence of camera obscura coming from China. Especially at Yu Unho painting made in 1789 there is a phrase that YongCheJangHwal(容體長闊) ShiWonShinGamIlBan(視元身減一半) which it means the reduction ratio of a portrait. Making the recuction ratio of a portrait clear and the beauty of form show the certain fact of using camera obscura. Needless to say, by Tasan`s testimony we can be proud that camera obscura was used in the late Chosun. There are little cases on the evidence or document using camera obscura in the 16th to 19th centuries Western painting history. In this point, the thing which Tasan tested camera obscura and the portraits by it drew, is very valuable in the world scientific history and the painting history. In a way, Tasan and Lee`s test and testimony were very important, as the entering 19th century their achievements remained obscure. Choi Hangi, Lee Kyugyong, and others partly tested optical instruments, but realism of paintings rapidly declined. Lee`s portraits are simple and plain in comparison with Western portraits taking well lighting. But In Lee`s portraits are worth well seeing the using of camera obscura. In the view of exposing the truth of the object, the exploiting on the stereography suitable for our face and clothing is brilliant artistry. So Lee`s portraits can be a good classical example having realism and modernity in the late Chosun cultural history.

알루미늄합금의 용탕제어기술(1)-수소가스거동 및 탈가스 기술

이태호,김경현,윤의박,Lee, Tae-Ho,Kim, Gyeong-Hyeon,Yun, Ui-Park 재료연구소 1998 機械와 材料 Vol.10 No.1

실리콘 질화막을 이용한 X-ray Lithography마스크용 박막물질의 개발

이태호,정창영,이규한,이승윤,안진호,Lee, Tae-Ho,Jeong, Chang-Yeong,Lee, Gyu-Han,Lee, Seung-Yun,An, Jin-Ho 한국재료학회 1997 한국재료학회지 Vol.7 No.5

본 연구에서는 LPCVD, PECVD, ECR plasma CVD방법을 이용하여 x선 노광 공정용 마스크의 투과막재료로써의 실리콘질화막의 증착과 그의 물성에 관하여 실험하였다. X선 노광 마스크용 투과막의 재질로써 요구되는 적정인장응력에 가지는 증착조건으로 실리콘질화막을 1$\mu\textrm{m}$정도의 두께로 증착하였으며 이 조건에서의 물성을 SIMS, XPS, ESR, AFM, spectrophoto-metry를 이용하여 비교 분석하였다. ECR plasma CVD방법으로 얻은 실리콘 질화막은 화학양론적 조성(Si/N=0.75)에 근접하는 막을 얻을 수 있었으며 표면 평활도와 가시광투과도가 가장 우수한 결과를 얻었다. 저온 증착법인 PECVD로 얻은 막은 Si/N비가 약 0.86정도이고 산소와 수소의 불순물함량이 가장 높게 나타났다. SiH$_{2}$CI$_{2}$를 이용한 LPCVD막의 경우는 Si-rich조성을 가지지만 수소 불순물의 함량이 가장 작게 나타났고 표면거칠기는 가장 나쁘게 나타났다. 그러나 위의 방법으로 얻은 실리콘 질화막의 최대 가시광투과도는 633nm파장에서 모두 90%이상의 값을 나타내었고, 또한 표면 평활도도 0.64-2.6nm(rms)로 현재 연구되고 있는 다른 X선 투과막재료보다 월등히 우수한 결과를 보였다.

고질소 내식강의 특성과 제조기술(I)-고질소 내식강의 특성

이태호,이창길,김성준,Lee, Tae-Ho,Lee, Chang-Gil,Kim, Seong-Jun 재료연구소 2000 機械와 材料 Vol.12 No.4

IAWQ MODEL NO . 1 에 의한 산업폐수처리장의 처리능력평가

이태호,신훈길,김창원,한기백 ( Tae Ho Lee,Hun Gil Sin,Chang Won Kim,Ki Bak Han ) 한국물환경학회 1995 한국물환경학회지 Vol.11 No.3

Mathematical models have been developed to understand and optimize the biological wastewater treatment process. In this research, SSP(Simulation of Single sludge Process) program, based on IAWQ model NO.1, was used to evaluate treating capacity of a pertrochemical wastewater treatment plant. The biokinetic and stoichiometric coefficients were calibrated and verified, and then the treatment capacity was estimated. Sensitivity analysis showed that the effluent COD concentration was greatly influenced by the parameters such as μ_H, K_S, and K_(dH) and MLVSS was affected by Y_H and K_(dH), while other parameters hardly had any effect. The calculated kinetic and stoichiomertric coefficients were μ_H, 9day¹, k,_COD 80㎎/ℓ, K_d 0.133 and Y_H 0.515 gCOD/gCOD. However, verification resulted relative error of 30%∼40% which was maybe due to different operating condition in 1991 and 1992. As a result of estimating the treatment capacity, the maximum allowable volumatric loading rate would be 1.35㎏/㎥·day based on MLVSS of 8,000㎎/ℓ. This means that the treating capacity of 1992 can be incereased up to 24%

탈염소화 미생물 부착 혐기성 고정막 반응기에 의한 테트라클로로에틸렌(PCE)의 분해

이태호,Lee Tae Ho 한국지하수토양환경학회 2004 지하수토양환경 Vol.9 No.3

A soil enrichment LYF-1 culture from a contaminated site, which could reductively dechlorinate 900 $\mu$M (ca. 150 mg/L) of tetrachloroethylene (PCE) stoichimetrically into cis-1,2-dichloroethylene (cis-DCE), was established and characterized. The enrichment culture can use yeast extract, peptone, formate, acetate, lactate, pyruvate, citrate, succinate, glucose, sucrose, and ethanol as electron donors for dechlorination of PCE. Addition of NO$_2$$^{[-10]}$ and NO$_3$$^{[-10]}$ as alternative electron acceptors showed complete inhibition of PCE dechlorination, but S$_2$O$_3$$^{-2}$ , SO$_3$$^{-2}$ and SO$_4$$^{-2}$ had no significant effect on PCE dechlorination. The enrichment culture was attached to ceramic media in an anaerobic fixed-bed reactor. The fixed-bed reactor showed more than 99% of PCE degradation in the range of PCE loading rate of 0.13-0.78 $\mu$moles/L/hr. The major end product of PCE dechlorination was cis-DCE. 염화에틸렌 화합물에 오염된 토양으로부터 고농도 (150mg/L)의 PCE를 cis-DCE까지 탈염소화하는 혼합미생물 농화 배양계 LYF-1을 구축하였다. LYF-1은 효모추출물, 펩톤, 포름산, 아세트산, 락트산, 피루브산, 시트르산, 석신산, 글루코오스, 수크로오스, 에탄올 등을 전자공여체로 이용하여 PCE를 탈염소화할 수 있었다. 한편, PCE를 대신할 수 있는 전자 수용체에 의한 PCE 탈염소화에 미치는 영향을 살펴본 결과, NO$_3$$^{-}$와 NO$_2$$^{-}$는 PCE의 탈염소화반응을 완전히 저해하였으나, S$_2$O$_3$$^{-2}$ , SO$_3$$^{-2}$ 및 SO$_4$$^{-2}$ 는 PCE의 탈염소화반응에 그다지 큰 영향을 미치지 않았다. LYF-1 혼합미생물을 혐기성 고정생물막 반응기내의 세라믹 메디아에 부착하고, PCE의 유입부하율 변화에 따른 처리 효율을 조사한 결과, PCE의 부하율 0.13-0.78 $\mu$moles/L/hr의 범위 내에서 99% 이상의 PCE 탈염소화 효율을 보였으며, PCE 탈염소화 반응의 최종산물은 cis-DCE이었다.

마황복용 후 사상체질별 이상반응에 관한 임상연구 : 무작위배정 이중맹검시험

이태호,형례창,양창섭,김락형,서의석,장인수,Lee, Tae-Ho,Hsing, Li-Chang,Yang, Chang-Sop,Kim, Lak-Hyung,Seo, Eui-Seok,Jang, In-Soo 대한한방내과학회 2009 大韓韓方內科學會誌 Vol.30 No.1

Background : Ephedra (Ephedra sinica) has been widely used to treat respiratory disease in traditional medicine of East Asia for over a hundred years. Despite safety concerns raised by some, the use of ephedra in traditional medicine is documented over more than 1,800 years. It is well established that ephedra is one of the central medicines in Korean 'Seseng constitution' medicine. In Sasang constitution medicine, all humans can be divided into one of four types: Soeumin, Soyangin, Taeumin or Taeyangin, and each constitution type has their own typical characteristics. Accordingly, it is hypothesized that the adverse effects of ephedra differ depending on the Sasang constitution classification. Objectives : The aim of this study was to determine adverse effects of ephedra which is classified as a Taeumin herb, and to observe whether the response differs or not. according to Sasang constitution classification. Methods : The study design was a double-blind randomized controlled trial. The subjects were healthy adults 20 - 50 years old who agreed to participate in this study. They were allocated through randomization to either ephedra group (N=55) or placebo group (N=24). where ephedra extract (6 g of dried ephedra) and placebo with similar opaque capsules were given twice for one day. To compare the adverse events of ephedra according to Sasang constitution classification, we analyzed blood pressure (systolic and diastolic), pulse rate, the morning questionnaire, and patient's global assessment scale score for well known adverse events: palpitation, headache, sweating, tiredness, dyspepsia, and dry mouth. Results : After ingestion of ephedra, the pulse rate had a significant increase in all constitution types. The changes of diastolic pressure in Soeumin and the changes of pulse rate in Soeumin, Soyangin and Taeumin had a significant increase in the ephedra over the control group. In the ephedra group, the palpitation and dyspepsia score of the patients' global assessment scale had a significant increase in Soeumin, with palpitation and sweating score increasing in Soyangin. Others observations were insignificant results. Conclusion : The results of this study may confirm that the physical responses or adverse effects of herbs differ for each type of Sasang constitution. Future studies using other herbs will be required to ascertain the herbal drug reaction of Sasang constitutions.

질소 첨가강의 특성과 개발현황

이태호,김성준,Lee, Tae-Ho,Kim, Seong-Jun 재료연구소 1997 機械와 材料 Vol.9 No.4

세계 5개국에서 생산된 황색종 잎담배의 주요 향기성분 비교

이태호,신경은,이재현,이은석,한병석,임흥빈,Lee Tae-Ho,Shin Kyung-Eun,Lee Jae-Hyun,Lee Eun-Sung,Han Byung-Seuk,Lim Heung-Bin 한국연초학회 2004 한국연초학회지 Vol.26 No.2

The present study was carried out to compare the composition of major essential oil components in the flue-cured tobacco produced by Korea, America, China, Brazil and Zimbabwe. Above 100 essential oil components were separated by GC and major 18 components of them, known to be important contributors to flue-cured tobacco flavor and smoke taste, were identified by GC/MS. Neophytadiene was major in quantities in the oils mostly and its composition in flue-cured tobacco produced by Korea, America, Zimbabwe, Brazil, and Unnam and Yenji region of China was 26.82\%,\;25.17\%,\;26.50\%,\;16.92\%,\;and\;18.75\%\;and\;14.87\%$, respectively. Megastigmatrienone, one of the major tobacco carotenoid degradation products was contained above $10\%$ in the oils of flue-cured tobacco produced by Korea and America, but, it was comprised about $5.66\%$ to 8.00 in Brazil, Zimbabwe, and Unnam and Yenji region of China. Damascenone is important to the aroma of tobacco as a crotenoid degradation products. Its amount in the oils was $3.31\%\;in\;Brazil,\;3.13\%\;in\;America,\;2.57\%\;in\;Zimbabwe,\;2.54%$ in Yenji of China, $2.00\%$ in Korea and $1.85\%$ in Unnam of China. These results can furnish the basic information capable of evaluating the quality value of flue-cured tobacco produced by various nations.

고질소 오스테나이트계 스테인리스강의 고온 석출거동

이태호,오창석,이창길,김성준,Lee, Tae-Ho,O, Chang-Seok,Lee, Chang-Gil,Kim, Seong-Jun 재료연구소 2003 機械와 材料 Vol.15 No.2