알카리성 부여제 도포에 의한 중성화된 콘크리트의 알카리성 회복성능에 관한 실험적 연구

김무한,권영진,강석표,유재강,이강우 충남대학교 산업기술연구소 2000 산업기술연구논문집 Vol.15 No.1

Concrete is the most commonly used material in construction field and it is the permanent construction material with respect to civil property. But, if concrete loses its alkalinity by CO2 gas, it loses its structural characteristics and results in total collapse in construction field. Therefore. it is needed to be studied the alkali-recovery performance by alkalization agent on carbonated concrete by accelerated carbonation test. In this paper, we investigate recovery performance by impregnating alkalization agent in carbonated concrete, then we evaluate alkali maintenance performance by pH survey in each kinds of finishing materials. The results of this paper can be summarized as follows. 1)Carbonated concrete under pH 10 was recovered its alkalinity to pH 11 at first stage by spreading alkalization agent on its outer surface. 2)After spreading alkalization agent, there is a difference due to types of moreover effect of anti-rust paint and ordinary cement paste were excellent.

오리 網膜에 存在하는 神經節細胞의 數와 分布에 關한 硏究

姜翰秀,金武剛,申台均,金弘善,柳時潤,李永浩 충남대학교 의과대학 지역사회의학연구소 1986 충남의대잡지 Vol.13 No.1

The number and distribution of the retinal ganglion cells in the 1-week-old and 7-week-old ducks were determined from whole flat mounted preparations stained with methylene blue and thionin. The results were summarized as follows. 1. In the 1-week-old and 7-week-old ducks, the areas of the retinas were 269.4㎟ and 357.2㎟, respectively, and the total cell numbers 1,742,800 and 1,808,800, respectively. 2. The ganglion cells based upon soma diameter were classified into 3 groups such as small (below 10㎛), medium (10-20㎛) and large (above 20㎛) ganglion cells. In 1-week-old duck, the relative frequencies of these 3 groups were 91.0%, 8.5% and 0.5%, respectively, and in 7-week-old duck, 83.7% 14.7% and 1.6%, respectively. 3. Area centralis was located at the distance of 1.6mm (1-week-old) and 2.0mm(7-week-old) nasal side from the anterior tip of the pecten. The number of ganglion cells in the area centralis was 11,000 cells/㎟ (1-week-old) and 12,000 cells/㎟ (7-week-old). 4. There was a gradual decrease in density of retinal ganglion cells extending from area centralis to the periphery of retina. 5. The density of the large (above 20㎛) ganglion cells was higher in the peripheral regions than in the center of retina. Higher densities were noted in the superior-temporal region in 7-week-old duck, and in the nasal region in 1-week-old duck than in the other regions. 6. The direction of the beak tip is approximately 30° in 1-week-old and 26° in 7-week-old duck from the angle of the pecten.

콘크리트 표면성능개선에 의한 중성화억제방안에 관한 실험적 연구

강석표,김경덕,이병기,길배수,홍성윤,김무한 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1(구조계)

Penetration of concrete by aggressive materials in solution may cause an undesirable effect on concrete durability, for instance when Ca(OH)₂ is being leached out or an attack by aggressive liquids takes place. In particular, carbonation occurs in concrete because the calcium bearing phases present are easily attacked by carbon dioxide and converted to calcium carbonate from surface of concrete, It has been known that the durability of reinforced concrete structure is concerned with the surface performance of concrete which affects on the carbonation occurred by invasion of CO₂ gas and the corrosion of steel bar occurred by O₂ In this paper, the effects of carbonation resistance by improvement of surface performance for concrete are investigated according to the accelerated carbonation test. It is believed that the carbonation resistance of concrete has been significantly improved by the application of penetrative hardening agent due to the formation of a dense surface.

氣固系의 熱 및 物質傳達 速度에 관한 硏究

姜參龍,片茂實 명지대학교 1978 明大論文集 Vol.11 No.-

本 硏究는 流噴霧乾燥에 關한 硏究로서 絶對溫度를 측정하여 건조속도와 증발열효율을 구하였고, 또한 噴霧乾燥 操作詩의 열 및 物質傳達關係를 규명하였다. 乾燥機의 軸方向의 길이, 粒子의 初期速度 및 噴霧液體 및 공기간의 질랑유속비를 변수로 해서 수학적인 모델을 설정하여 理論式을 유도하였으며, 특별히 製作된 건구-습구 熱傳對濕度計에 의하여 Local Air Temp., 습도 및 분무입자의 斷熱飽和溫度를 측정하였다. 간단한 이론식으로부터 유도한 축방향의 絶對溫度에 관한 식은 열효율을 생각하여 수면 실험치와 잘 맞았다. 또 열효율과 移動單位數를 聯關시켰으며, 여기서 구한 移動單位數 및 移動單位높이를 이용하여 실제 건조기 설계시 최적치를 얻을 수 있다. 실험결과로는 습도분포를 측정하여 열효율과 乾燥速度와의 相關關係를 규명하였는 바 관계 理論式 과 實驗値가 잘 맞았으며, 또한 丹枉型 流噴霧乾燥機에서는 Plug Flow와 假定하여 設計해도 무방하다는 結論을 얻었다. The heat & mass transfer mechanism was investicated systematically in the view points of spray-dryer design by analyzing the drying rate and thermal efficiency in the cocurrent air spraying dryer. Mathematical model was formulated in terms of the axial distance from the nozzle, drop size, drop velocity, the temperatures of cocurrent air-gas streams, assuming the spray-drying system is an adiabatic process and the rate-determining step is in the side of gas streams. The comparision of experimental results with the theoretical model was brought into such a conclusion that optimum operating condition could be well discussed in the view point of spray-dryer design. The design parameters were correlated in the form of dimensionless groups and NTU method was suggested and appreciated mathematically as a design criteria of air-spraying dryer.

조혈모세포이식술이 골수기질세포의 기원 및 조골세포로의 증식 및 분화에 미치는 효과

강무일,조성원,오은숙,백기현,이원영,오기원,김혜수,한제호,윤건호,차봉연,이광우,손호영,강성구,김춘추 대한내분비학회 2000 Endocrinology and metabolism Vol.15 No.4·5

저용량, 고화질 비디오 압축 브라우징에 대한 설계 및 구현

강진석,김무영,김장형 濟州大學校 情報通信硏究所 1999 情報通信硏究所論文集 Vol.2 No.-

In the 21th century. everyone feels that the multimedia system is close at hand in real life due to the rapid advance of the computer processing ability and high speed and high quality of communication services. Also the limited frequencies resource will be optimized due to rapid advances in digital video technology which is believed superior to analogue technology in information engineering. MEPG-2 has been introduced for broadcasting use such as digital TV Thus it features the high-definition and hyper-low bit rate. But. because of much throughput it has been implemented by high-priced private ASIC chip and is not in general use yet. But in this research. noticing the rapid enhancement of PC processor performance comparing with the price. MPEG-2 was developed by real time software MPEG-2 had been known impossible to implement with S/W. but the research proved the possibility of the S/W implementation and below are the pictures also in the research was improved Motion Vector and Compensation Algorithm which requires the most operations and DCT was made possible real time process. Multimedia Info Society has settled and accompanied by the rapid advance of image-processing technology and lots of standards.

한국산야생등줄쥐(Apodemus agrarius coreae)의 해마복합체에서 neuropeptide Y 면역반응세포에 관한 연구

김무강,송치원,이경열,박일권,정영길,이강이,김종섭 충남대학교 수의과대학 동물의과학연구소 1997 動物醫科學硏究誌 Vol.5 No.-

Neuropeptide Y(NPY) was first isolated from porcine brain. This discovery has lead some workers to study the distribution of this peptide in the central nervous system of various mammals. In this study the distribution pattern of neuropeptide Y-immunoreactive neurons was examined in the hippocampal complex of Striped field mouse in Korea(Apodemus agrarius coreae) Experimental animals were anesthesized with thiopental sodium and perfused with 4% paraformaldehyde through the left ventricle and the ascending aorta. The brains were removed and transferred 10%, 20% and 30% sucrose solution. Sections were cut on a cryostat into 40㎛-thick. The tissue was immunostained with free-floating and avidin-biotm complex(ABC) method. The results obtained in this study were summarized as followings. 1. The most of NPY-IR neurons in hippocampus proper were found in the polymorphic layer and a few was found in the pyramidal layer. 2. The process run vertically in the deep polymorphic layer and run parallel to corpus callosum in superficial polymorphic layer. 3. The shapes of neurons in hippocampus proper were varied of polymorphic, oval or round, and the nerve fibers were found in the molecular laver and the hippocampal fissure. 4. The highest density in number of NPY-IR neurons on dentate gyrus were found in hilar area of dentate gyrus. 5. The most of NPY-IR nerve fibers were found in molecular cell layer.

廢鑛 周邊의 汚染實態에 對한 精密調査

申鉉武,李武康 嶺南大學校 環境問題硏究所 1999 環境硏究 Vol.19 No.1

생물학적 활성탄공정에 의한 이용한 상수처리시 Biomass의 거동과 THM생성능의 변화

이무강,한명호 慶星大學校 環境問題硏究所 1994 環境硏報 Vol.4 No.1

Biological activated carbon(BAC) treatment of trihalomethane(THM) precursors has an effective alternatives with low running cost. And so, changes of THM formation potential(THMFP) and removal of substrates in the natural water were investigated as the first step to clarify the mechanisms of the decrease/increase of THMFP in the BAC treatment. Increases and decreases in THMFP concentrations were observed in effluents during prolonged operation. The THMFPs of treated natural water effluents significantly increased than those of the influents at initial stage of the biodegradation. These increases of THMFPs coincided approximately with increases in microbial growth within the activated carbon fiber(ACF) column. The gel chromatography analysis suggested that the substrates with relatevely high THMFP were produced when the biodegradation took place, the molecular weight of which were around 10,000-20,000.

고양이, 돼지 및 오리의 망막에 존재하는 S-100 단백질의 분포에 대한 면역화학적 연구

김무강,김상근,이근좌 충남대학교 수의과대학 동물의과학연구소 1994 動物醫科學硏究誌 Vol.1 No.-

소의 뇌에서 처음으로 분리된 S-100 protein이 각 동물 망막에 존재하는 상태를 규명하기 위하여 S-100 protein antiserum을 이용하여 고양이,돼지, 오리의 망막을 면역화학적 방법으로 처리하여 그 분포상태를 조사하였던 바 다음과 같은 결론을 얻었다. 1. 고양이, 돼지, 오리의 망막에 분포하는 S-100 protein의 분포부위와 그 정도가 동물에 따라 서로 달랐다. 2. 고양이와 돼지에서는 각신경세포층 및 각 망상층에 모두 존재하였으나 오리에서는 각신경세포만 존재 하였다. 3. 각 동물 망막에 존재하는 S-100 protein의 분포를 규명하는 것은 앞으로 각 동물의 망막연구에 필요한 각 층들을 구별 하는데 좋은 지침이 될 수 있다.