부식산의 광촉매 산화 공정에 도입된 여러 종류이 상용 TiO₂비교연구

문경숙,김다희,이동석 江原大學校 産業技術硏究所 2001 産業技術硏究 Vol.21 No.B

In this study, the effects of crystalinity, composition and particle size of TiO2 catalysts on the degradations of humic acid in aqueous solution was assessed using the commercially avaliable TiO2 particles. Photocatalytic oxidations of humid acid (HA, Aldrich Co.) solution were carried out in case of adding different types of TiO2 catalysts and their decomposition efficiencies were analyzed with respect to pH, DOC and UV absorbances values for the HA solutions and compared one another. The experimental results showed that TiO2 particles(Degussa P-25) mixed with anataze and rutile gave the highest degradation efficiencies, respectively and much lower degradation efficiency in TiO2 paticles of rutile only type. In comparing among ST series of anataze types, it was observed that the degradation efficiencies generally were increased with increasing TiO2 contents and surface area of the particles. Higher degradation efficiency of HA was also found in zeolite type(D-TZ) of TiO2 paticles compared with hydroxyapatite type (D-TH) of TiO2 particles.

自家骨移植에 關한 實驗的硏究

文東先 대한치과의사학회 1992 대한치과의사학회지 Vol.13 No.8

5가 이온주입에 의해 형성된 ?? 층의 불순물 활성화 연구

문영희,이동건,배인호,김말문,한병국 嶺南大學校 基礎科學硏究所 1995 基礎科學硏究 Vol.15 No.-

Ion implantation was used to form shallow ?? junction in silicon substrate, Czochralski-grown(100) silicon wafers, 5~9 Ω㎝ p-type, were implanted with arsenic and phosphorous at room temperature. Arsenic and phosphorus depth profiles were measured by secondary ion mass spectroscopy(SIMS). Atomic distribution of arsenic and phosphorus in samples could be analysised by comparison of the SIMS prlfiles with computer simulations using the SUPREM Ⅳ program. Peak position of the arsenic profile are about 440 A in depth at 60 keV. And that of the phosphorus profile is about 1100 A in depth at 85 keV. We have measured the behavior of electrical properties - (SRP)Spread sheet resistivity, Hall mobility. sheet resistivity and Sheet carrier concentration - vs annealing temperature as well as lattice recovery of As? and p? implanted silicon samples. In the cases of arsenic and phosphorus implanted samples, increasing of Hall mobility at 500 ~ 700 ℃ annealing temperature was shown recrystallization process of implanted layer.

흰쥐 적색핵에서의 Parvalbumin성 신경원의 분포상태와 미세구조

이문용,한동일,천명훈,정진웅 대한해부학회 1994 Anatomy & Cell Biology Vol.27 No.3

한국 상장기업의 IT자본과 노동 및 비IT자본의 대체성에 관한 연구

문성배,홍동표 한국은행 2004 經濟分析 Vol.10 No.2

본 연구는 2000-2002년까지의 한국 164개 상장기업에 대한 자료를 이용하여 IT자본과 노동 및 비IT자본간의 대체탄력성(elasticity of substitution)을 측정하였다. 특히 생산요소간 대체성의 척도로서 널리 쓰이고 있는 Allen 대체탄력성(Allen elasticity of substitution)의 문제점을 지적하고 Allen 대체탄력성 뿐만 아니라, 가격탄력성, Morishima 대체탄력성(Morishima elasticity of substitution), 그리고 shadow 대체탄력성(shadow elasticity of substitution)을 측정하였다. 본 연구의 추정결과에 따르면, 첫째, IT자본은 노동과 비IT자본에 대한 대체재(substitute)인 것으로 나타났으며, 우리나라 기업들의 경우 IT자본이 노동을 대체하는 정도보다 IT자본이 비IT자본을 대체하는 정도가 큰 것으로 나타났다. 또한 비제조업보다는 제조업에서, 정보화가 덜 된 기업들보다는 정보화가 많이 된 기업들에서 IT자본의 노동과 비IT자본에 대한 대체성이 강한 것으로 나타났다. This paper examines the substitutability of IT capital for other inputs, such as labor and non-IT capital, using the data on 164 Korean firms from the period of 2000-2002. Estimating various elasticities of substitution between IT capital and other inputs, we find that IT capital is a substitute for labor and non-IT capital. In particular, we find that IT capital is more substitutable for non-IT capital than for labor. We also find that the estimated elasticities of substitution between IT capital and other inputs are higher for manufacturing firms than for non-manufacturing firms, and higher for IT-intensive firms than for less-IT-intensive firms.

진해만 연안 퇴적물의 자성과 중금속에 대한 연구

문아윤,신경훈,석동우 한양대학교 이학기술연구소 2004 이학기술연구지 Vol.7 No.

진해만 두 정점의 자기특성과 대자율의 비교를 바탕으로 하여 중금속 농도 변화가 자화강도 변화에 미치는 영향을 있는지를 살펴보았다 이를 위해 깊이에 따른 중금속 농도 변화 (산화환원 환경) 그리고 유기물' 의 함량을 조사하였다 본 연구에서는 5가지의 중금속(Al, Fe, Cr, Ni, Mn)의 농도가 측정되었으며, 자화강도와 중금속의 농도 변화는 대체적으로 유사한 경향을 나타내었고, 산화환원환경에서 각각 중금속과 자화강도의 상관성이 다르게 나타났다. 산화환경에서는 반대되는 경향을 보이고, 환원환경에서는 비슷한 상관성을 나타낸다. 총유기물(TOM)과 대자율을 비교해 보면 두 정점의 유기물 농도가 다르게 나타나며, 산화환경에서 반대되는 경향성을 나타내고, 환원환경에서 비슷한 경향을 보인다. 이것은 산화환원 환경에 따라 유기물 함량과 중금속 의 존재형이 변화하므로 서로 연관성이 있다고 생각된다. The impact of heavy metal concentrations on magnetization compared to magnetic susceptibility is investigated by the measurements of heavy metals (redox change) and organic matter contents in the sediment core samples at two stations of the Jinhai Bay. In the present study, five heavy metals (Al, Fe, Cr, Ni, Mn) concentrations were determined, and indicated generally similar trends with the corresponding magnetization. The relationship between heavy metal concentration and magnetization depend on redox-environmental conditions, showing negative correlation under the oxidation environment and positive correlation under reduction environment, respectively. Comparing total organic matter content with magnetic susceptibility, organic matter contents at both stations are different, and showed a opposite trend against magnetic susceptibility in oxidation parts, and a similar pattern in reduction parts. These results demonstrate that both organic matter contents and heavy metal speciation are influenced by redox-condition.

한국 재래산양에서 Bovine Viral Diarrhea, Bovine Herpesvirus-1, Parainfluenza Type-3 바이러스에 대한 혈청학적 연구

한동운,권용국,문진산,윤소라,위성환,장환,탁동섭,이태욱,강문일 한국수의공중보건학회 2003 예방수의학회지 Vol.27 No.3

The 948 goat sera were serologically tested for ten pathogens including bovine viral diarrhea (BVD), bovine herpes virus type-1 (BHV-1) and parainfluenza virus type-3 (PI-3). By viral neutralizaion test, three pathogens including BVD virus, BHV-1, PI-3 were applied for screening each neutralizing antibody and its titration. Among 948 sera, there were 215 seropositives (22.7%) against BVD virus, 25 (2.6%) against BHV-1 virus, and 161 (17.0%) against PI-3 virus, respectively. In the seropositive cases to BVD virus, provincial prevalence of them were recorded as Gyeongnam(30.8%) for the highest one, while as Jeonbuk (15.8%) and Gyeongbuk(l6.7%) relatively for the lower ones. Among them, higher than 1:8 in antibody titration was classified as 74 cases (34.4%) which were suspected the cycle of its infection in their herds. Among the seropositives to BHV-1, it was relatively lower prevalence rate ranging from 1.7% to 6.7% that those of BVD virus and PI-3, but more importantly they were prevailing across the country. Most of the seropositive cases (42.9%) to PI-3 were classified as 1:4-1:16 in titration, but also distributed all around the country. The prevalence in goats varied according to areas (15.8 to 30.8%). Related to the provincial prevalence of three viral agents in Korean goats, it seemed that three viral pathogens would be directly or indirectly involving in various disorders as primary or secondary causative agents resulting in decreased productivity.

여성 골반재건술과 요실금수술에서 복강경의 역할

문성택,김윤숙,전섭,최승도,선우재근,배동한 순천향의학연구소 2007 Journal of Soonchunhyang Medical Science Vol.13 No.1

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이미지 검색을 위한 관심영역의 요소추출과 데이터 변환 연구

강문주,양동일,김덕은,최형진 강원대학교 정보통신연구소 2006 정보통신논문지 Vol.10 No.-

In this paper we designed the content-based image system. It discovers the characteristic value of color area for the existing image, when any user establishes the special interesting region for the question images. And we designed the system to be able to search the similar image of the interesting region, compared with the table that saved the characteristic value of moment which is unchangeable for the size and the rotation of form. In this paper, we suggest the image search model based on neural network. This is able to seek for the aimed image through the feedback to search the nonlinear relations by the method of searching content-based image using SOM neural network. We make use of the Precision and the Recall that are used for the system evaluation using the similar matching method in general. As a result of the evaluation of the content-based image system, we can reduce the time and memory to find out the feature value of the image that is meaningless in the general images.

한국 재래 산양에서 Leptospira spp.에 대한 혈청역학적 연구

한동운,권용국,문진산,윤소라,위성환,장환,탁동섭,이태욱,강문일 한국수의공중보건학회 2003 예방수의학회지 Vol.27 No.3

Between January 1999 and September 2001, 948 sera (120 from each province except 108 from Chungbuk) from 8 provinces were sampled from Korean goats. All the samples were serologically tested for Leptospira spp. By the microscopic agglutination test against four L. interrogans serovars including canicola, icterohaemorrhagiae, pomona and hardjo, 948 Korean goats were confirmed as 11 seropositives (1.2%) only infected with L. icterohemorrhagiae. All positive sera were collected from Gyeonggi (5), Gangwon (4) and Chungbuk (2). Titration of them were classified as 1:100 of 10 sera except one case with 1:200 from Gyeonggi. It was meaningful that the pathogen in Korean goats was mainly distributed in the northen part of the country. Consequently, the results in the study were confirmed and analyzed the recent status of infection of leptospirosisas zoonotic agentsome in Korean goats.