遲滯時間이 貯留函數 모델에 미치는 影響

남궁달 충북대학교 농업과학기술연구소 1995 農業科學硏究 Vol.12 No.2

The experiment was conducted to elucidate the differences of isozyme pattern and activity to esterase in susceptible and chlorpyrifos-(Rc), dichlorvos-(Rd) and permethrin-(Rp) resistant strains of female house flies(Musca domestica L.) using the methods of agar gel electrophoresis and filter paper test. And the results were summarized as follows. 1. Esterase isozyme showed eleven bands in the susceptible and three resistant strains by agar gel electrophoresis. 1) Esterase isozyme bands were Estα1β1, Estα2β2, Estα3β3, -Estα1β1 in the head, Estα1β1, Estα2β2, Estβ6, -Estα1β1, -Estα4β4 in the thorax and Estα1β1, Estα2β2, -Estα1β1, -Estα5β5 in the abdomen of the susceptible and resistant strains. 2) Estα5β5 was detected in all part(head, thorax, abdomen) of resistant strains, and Estα4β4 was not detected in the head and thorax of resistant strains. 3) -Estα2β2 showed more high activity in the thorax of Rc strain than the other strains. 4) Only -Estα3β3 was detected in all part of Rd strain. 5) -Estα2β2 was not detected in all part, and Estα3β3, Estα4β4, Estβ6 were not detected in the abdomen of Rp strain, however, those were detected in susceptible strain. 2. Esterase-α and -β activities appeared in the head, thorax and abdomen of susceptible and resistant strains by filter paper test. 1) Esterase-α showed more high activity than esterase-β. 2) Esterase-α activities were 1.15, 1.18 and 1.03 times in the head, 0.87, 1.18 and 0.89 times in the thorax and 0.82, 1.51 and 1.30 times in the abdomen of Rc, Rd and Rp strains to the susceptible strain, respectively. 3) Esterase-β activities were lower 0.66, 0.77, 0.70 times in the head, 0.84, 0.90, 0.90 times in the thorax of Rc, Rd and Rp strains than susceptible strain, but higher 1.19, 1.28, 1.25 times in the abdomen, respectively.

水性가스化 反應에 關한 硏究

姜京熙,李根培,辛源太 단국대학교 대학원 1982 學術論叢 Vol.6 No.-

The influence of reactant gas composition on the rate of the water gas shift reaction over an iron oxide chromirum oxide catalyst was studied. This method of analyzing experimental tests showed that the rate of initial reaction of the water gas shift reac tion had increased with increasing P_(H_2O), but that had decreased with increasing P_(CO_2). It was found that the mass tranfer affect the rate of the water gas shift reaction except catalyst system. And this experimental results showed that the rate of reaction had increased with increasing P_(CO_2) and P_(H_2O). At this experimental condition, the rate of initial reaction was established γ_0=kP_(CO_2) P_(H_2O)/1+K_(H_2O) P_(H_2O) and the reaction rate constant, K, 225(m㏖/g-cat. hr) and K_(H_2O) is 3.5(atm)^-1.

식물플라크톤의 세포외배출유기물을 고려한 소양호의 1차생산과 유기물 부하

남궁현,김범철,황길순,최광순,김철구 江原大學校 附設 環境硏究所 2001 環境硏究 Vol.18 No.-

The autochthonous and allochthonous organic carbon loading were measured in Lake Soyang, to estimate the amount of carbon loading into the lake and the contribution of their sources to the lake's carbon loading. Autochthonous carbon loading was estimated from phytoplankton primary production with the extracellular organic carbon(EOC). Allochthonous loding was determined by measuring dissolved organic carbon(DOC) and particulate organic carbon(POC) concentration in the main inflowing Soyang River. Both autochthonous and allochthonous organic carbon loading were high during the summer, from July to September, and accounted for 43.2% and 71.7% of the annual loading, respectively. Primary productivity was elevated up to 1,000 mgCm^(-2)d^(-1)during summer and lowest in winter. EOC production from phytoplankton was also large in summer, resulting in a high DOC concentration in the lake water. Primary production of phytoplankton and allochthonous organic matter loading from the watershed contributed to 53.6% and 46.4% of total loading, respectively. The EOC production accounted for 4.4~21.2% of POC primary production, implying that EOC production of phytolankton must be considered in estimation of primary production.

Ferrite 觸媒에 의한 一酸化炭素의 轉位反應에 관한 硏究

姜京熙 단국대학교 1986 論文集 Vol.20 No.-

This research has been Performed on the purpose to reveal the reaction order and to examine how temperature, mole ratio, activity energy and space velocity on the conversion in using Feerrite cata1yst to convert. CO-gas into CO_2. These catalyst were prepared by copreciption and characterized by means of X-rays diffraction and BET studies. The result of experiment on carbon-monoxide-gas conversion reaction reaction are as follows; a) the conversional reaction of carbon monoxide is the first order reaction. b) Reaction temperature was revealed as range from 553K to 573K. c) the mole ratio of carbon monoxide vs oxygen was showed with in the range of 1.34. d) The activity energy of stronger than of any others was revealed at copper ferrite catalyst.

李奎報詩의 現代的 照明 : 偶吟江上을 中心으로

金慶洙 中央大學校 人文科學硏究所 1988 人文學硏究 Vol.15 No.-

성공적 정부개혁을 위한 동인(動因)으로서의 조직문화

朴慶孝 한국외국어대학교 사회과학연구소 1999 社會科學論集 Vol.17 No.-

四七論爭에서의「四端」解釋

宋兢燮 慶北大學校 文理科大學 1974 文理學叢 Vol.2 No.-

This essay treats the theoretical disputes over '4 Dan-7 Jong' theory in 'Ri-ki' philosophy between Lee Toigye (1501∼1570) and Ki Ko-bong (1527∼1572) The controversy begun in 1559 and continued for 7 years, can be devided into 3 periods in its development in content, the first of which, the theoretical developments of the two philosophers, has been treated here in their mutual comparisive aspects. Ki Ko-bong refuted Toigye's theory, and Toigye on his side refuted Kobong's refutation supporting his own theory. I here support Toigye on this point on several grounds. I go on thereafter to present the following problems of importance. (1) the Being, defined as 'Thin' in general, is devided into real and ideal Beings. (2) Everything is derived from, and explained by 'Thing', to which is applied Ri-ki logic, the logic which is plane-level logic, unlike the one which goes through contradiction to unification. (3) The method of philosophy is regarded as the way to the progressive realization of Goodness through introspection; the way includes nothing of the conversion from quantity to quality, but only the quantative development. (4) The principle on which to define good and bad is, here, 'Ju-Ri' (Ri as the main role), or 'Ju-Ki' (Ki as the main role), the theory of mutual appearance of Ri and Ki. (5) The problem of the systemic order of values (goodness). The five problems above are very important in establishing Toigye philosophy on a newer and richer ground.

垂直棒을 充塡한 氣泡塔에서 混合特性에 關한 硏究

姜京熙,咸榮敏 단국대학교 1984 論文集 Vol.18 No.-

The axial mixing characteristic were investigaved in a cocurrent bubblecolumn containing vertical rods. The gas hold-up was determined by the bed expansion measuring technique. An impulse response technique was employed to obtain RTD-curves. The RTD-curves were analysed for determination of the mean residence time and the axial disperson coefficient. The gas hold-up was not affected by the ncrease of the number of rods, but there were increasing tendencies of the mean residence time and the axial dipersion coefficient with the increase of she number of rods. Also axial dispersion coefficient was found to increase with superficial liquid and gas velocity. The data weve obtained in the approximate range of gas velocity of 3 ㎝/sec to 10 ㎝/sec and liquid velocity of 0.2 ㎝/sec to 0.9 ㎝/sec.

광중합 복합레진의 색상과 깊이에 따른 중합도의 비교

최경호,이주현,박호원 大韓小兒齒科學會 2004 大韓小兒齒科學會誌 Vol.31 No.2

치과용 수복재료가 요구하는 심미성과 치아의 보존 및 편의성 등의 여러 조건들을 만족시키기 위해서 치과용 복합레진은 적절한 중합이 이루어져 물리적 기계적 성질을 충족하고, 색조의 안전성, 중합시의 수축과 이에 따른 변연 적합도 문제를 해결할 수 있어야 한다. 본 연구에서는 광중합 복합레진 Z250의 색상과 두께를 달리 하여 광투과도와 중합도를 각각 적외선 분광분석법과 미세경도 측정을 통해 비교하여 다음과 같은 결과를 얻었다. 1. 플라즈만 아크 중합기의 사용 시 3초 중합과 6초 중합의 경우로 나누어 실험하였으며 6초 중합에 있어서 할로겐 중합 20초와 유사한 광투과도 및 미세경도를 나타내었다. 2. 광중합 복합레진의 색상을 A1, A2, A3, A3.5로 나누어 실험한 결과 레진의 표면에서는 색상별로 광투과도나 경도의 차이가 나타나지 않았으나, 2, 3, 4㎜로 깊이가 증가함에 따라 색상에 따른 광투과도나 경도의 차이가 확연하게 나타났고 특히 색상이 어두워질수록 4㎜의 깊이에서 중합도가 더욱 낮았다. 3. 중합깊이의 비교를 위하여 0, 2, 3, 4㎜ 깊이로 나누어 실험한 결과, 2㎜이상의 깊이에 있어서는 미반응 단량체의 양이 유의하게 많은 것으로 나타났다. 4. 광중합 복합레진의 광투과도를 알아보는 FTIR을 통한 단량체 전환도와 미세경도 측정경도 측정사이에는 유의한 상관관계를 보였다. Adequate polymerization is a crucial factor in obtaining optimal physical properties and clinical performance of resin composite restorative materials. The purpose of this study was to determine the effectiveness of shade and depth on dental composite resin polymerized with plasma arc curing unit employing FTIR and microhardness. From this experiment, the following results were obtained : 1. The light transmission and microhardness by mode 6 in plasma arc curing were similar to by 20 sees in halogen light curing. 2. The experimental groups of A1, A2, A3, A3.5 were not significant difference to light transmission and microhardness on surface and 2mm depth, but were significant difference on 3mm and 4mm depth. Especially light, transmission and microhardness were small in darker shade and deeper thickness 3. Compared with depth cure, uncured monomer amount increased at more than 2mm depth. 4. The light transmission by FTIR and polymerization by microhardness were significant corelation.

선형 시스템의 모델 축약에 관한 연구

金慶哲,崔炯範 홍익대학교 산업기술연구소 1998 産業技術 Vol.8 No.-

The modelling of complex dynamic system is one of the most important subjects in engineering. A model is often too complicated to be used in real problems so approximation procedures are often used to achieve simpler models than the original one. The concepts of impulse energy approximation is introduced. The reduced model in obtained from the most significant pairs of alpha and beta parameters. There exists errors because from the most significant pairs of alpha and beta parameters. There exists errors because of the truncation. To overcome this problem an improved impulse energy technique is presented in the paper by appropriately selection alpha and beta parameters. There exists error because of the truncation. To overcome this problem an improved impulse energy technique is presented in paper by appropriately selecting alpha and beta parameters to retain more impulse response of the original system. This algorithm is programed using MATLAB language. A reduced-order model for the excitation system of power plants as an example study is considered This technique seems to be easy to perform and shows a good simulation results.