• Journal of Wetlands Research
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• v.14 no.2
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• pp.255-263
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• 2012

The stream has various environments and they are serving as main habitats of aquatic organisms. The distribution of phytoplankton is affected by water environment, especially pH, nitrogen and phosphorus. To reveal the relationship between phytoplankton distribution and water environment, we measured pH, $NO_3{^-}$ and $PO{_4}^{3-}$ concentration, and abundance of phytoplankton at 10 sites in the upper stream of Dorim-cheon. pH value ranged 5.05 to 7.56. $NO_3{^-}$ and $PO{_4}^{3-}$ concentrations ranged 0.4 ~ 4.9ppm and 0.02 ~ 0.99ppm, respectively. A point source of $NO_3{^-}$ was Seoul National University but concentration was not high and dropped to normal range at 400m downstream. $NO_3{^-}/PO{_4}^{3-}$ ratio ranged 28 to 152 except site 4 (0.4) where was affected by $PO{_4}^{3-}$ point source. Water pH, $NO_3{^-}$ and $PO{_4}^{3-}$ concentrations increased with downstream and were related to the input of irrigation water from Han-river between site 5 and 6. Bacillariophyceae alge dominated this stream. Phytoplankton density increased abruptly at downstream of site 5. In general, phytoplankton density did not increase until the $NO_3{^-}$ concentration of 3.5ppm and $PO{_4}^{3-}$ concentration of 0.07ppm. Phytoplankton density was low at sites where $NO_3{^-}/PO{_4}^{3-}$ ratio was larger than 50.

• Journal of the Korean Society of Costume
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• v.60 no.9
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• pp.58-76
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• 2010

In this study, the shapes of po worn by military officers who served During the period of Japanese Invasion of Korea(1592-1598) were investigated. Findings of the study can be summarized as follows. Various types of po that military officers usually wore during the period of Japanese Invasion of Korea includes jikryeong, dapho, dopo, cheolik, aekjureum, jangeui, jungchimak and bangryeongpo. Out of these types, cheolik and jungchimak were most often used by the officers. Po that were usually worn by military officers during the period of Japanese Invasion of Korea as above mentioned is characterized as no difference in length between the front and back of the costume, kalgit and a pair of coat strings which are directly attached to po. The sleeves of the costume are bean chaff-shaped in some cases and just narrowly shaped in other cases. Similarly, the outer seop of po was either double-layered or single-layered. For jikryeong and dapho, mu is usually type of outside wrinkle. For dopo, its rear kit has the inner hem whose right and left edges are usually distant, respectively by 6~16cm, from the back center of the costume. Cheolik and aekjureum usually have either fine or broad pleats. For jangeui and jungchimak, mu is usually trapezoid in shape. Among various types of po which were usually worn by military officers during the period of Japanese Invasion of Korea, most representative are jikryeong from the tombs of Bae Cheon jo, dapho from Shin Yeo Gwan, dopo from general Bak and Bae Cheon Jo, cheolik from Nam Yoo and Cho Gyeong, aekjureum from Shin Yeo Gwan, jangeui from Kim Ham, jungchimak from Bae Cheon jo and bangryeongpo from Cho Gyeong.

• Journal of the Korean Institute of Educational Facilities
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• v.10 no.3
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• pp.5-13
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• 2003

This paper is a series of study for the development of rural elementary school facilities model applying to the regional characteristics. Therefore, main theme of this paper is to pile up and analysis of elementary school facilities data in Po Cheon through a series of actual survey and interview with teachers. The results are summarized as follows ; First of all, in case of Po Cheon, it needs to study for urban model type as well as rural elementary school facilities model type. Second, extension type of buildings has separated as three types-zigzag extension type, vertical & horizontal extension type, separate building type. But another characteristics, such as type of site plan, type of corridor and module of classroom unit, outdoor space and elevation design, are monotonous. Third. the results of this analysis show that it is desirable to locate houses for teachers within boundaries. Finally, the future paper needs to be studying more various module of classroom unit, extension type, space program, type of floor plan and site plan.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2003.08a
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• pp.117-120
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• 2003

Fractal mathematics is being highlighted as a research method for classification of image. But the application of Fractal dimension(FD) has been required the complicated calculation method because of its complex repetition progressing. In this paper, it has been developed the new approach method to express the Fractal Dimension(FD) for aging level calculation and estimation system of outside insulator using special image processing algorithm. As a result after FD testing, the recognized aging estimation of FD has a very characteristics compared to the conventional visual inspection.

• Electrical & Electronic Materials
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• v.10 no.7
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• pp.668-673
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• 1997

A Single-crystalline Mn-Zn Ferrite (110 orientation) was masklessly etched by focused Ar laser irradiation in an H$_3$PO$_4$ solution. The depth of the etched grooves increases with increasing a laser power, decreasing a scan speed, and increasing the H$_3$PO$_4$concentration. The width of the etched grooves increases with a increasing laser power, but was relatively insensitive to the scan speed and H$_3$PO$_4$concentration. High etching rate of up to 714 ${\mu}{\textrm}{m}$/s and an aspect ratio of 6 for vertical slab structure have been obtained by the light-guiding effect of the laser bean in the H$_3$PO$_4$ solution.

• Current Research on Agriculture and Life Sciences
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• v.6
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• pp.99-104
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• 1988

Water polution status of urban streams in Daegu city were observed to provide the basic information for the effective purification of urban sewage and the conservation of Keumho river. Periodically, pH, DO, COD, nitrate and phosphate of water were investigated at Yee cheon, B$\ddot{o}$m$\ddot{o}$ cheon, Chilsung cheon, Dalseo cheon and Kongdan cheon. The results were as follows. 1) The ranges of average values of analyzed components for 12 months at six sampling sites were pH 7.3-8.2, DO trace-6.5ppm, COD 20.4-116.9ppm, T-N 23.2-31.7ppm, $NH_4$-N 18.3-27.7ppm, $NO_2$-N 0.08-1.89ppm, $NO_3$-N 0.19-1.51ppm, $PO_4$-P 2.50-17.28ppm. 2) At Kongdan cheon, the most heavily polluted site, average values of components were pH 8.2, DO trace, COD 116.9ppm, T-N 23.2ppm, $NH_4$-N 18.3ppm, $NO_2$-N 1.89ppm, $NO_3$-N 1.51ppm, $PO_4$-P 17.28ppm. 3) The values of pH, DO, COD, T-N and $NH_4$-N at winter urban streams were higher than those at summer urban streams. And the values of $NO_2$-N and $PO_4$-P were more or less higher at summer urban streams.

• Journal of Environmental Health Sciences
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• v.22 no.1
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• pp.5-11
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• 1996

The more accurate estimation of the pollutant loadings from nonpoint source is needed to evaluate water quality of water resources such as river and reservoir. Therefore this study was performed to grasp the scale and characteristics of pollutant. In this study, STORM model was applied to I-cheon district to estimate runoff and pollutant loading of SS, BOD, T-N and $PO_4-P$. The results estimated by STORM model were fitted well to surveyed water quality in flow, SS and BOD. The annual loadings were estimated to be 36,463 kg/$km^3$/yr of SS, 8,090 kg/$km^3$/yr of BOD, 4,435 kg/$km^3$/yr of T-N and 358 kg/$km^3$/yr of $PO_4-P$. It was also found that the monthly pollutant loadings of SS, BOD, $PO_4-P$ were greatest in May and T-N in April.

• Journal of the Korea Fashion and Costume Design Association
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• v.11 no.1
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• pp.133-153
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• 2009

Clothing was excavated when the Bae's clan of Seong-san, Yeong-dong, Chung-buk in Sep. 2, 2004. The tombs that the clothing could be restored were the tombs of Bae Cheon-jo(10th generation) and the tomb of Mrs. Nam of Go-seong, the wife of Bae Sang-gyeong(1lth generation). For identifying the features and methods of sewing used for the clothing of man and woman around Po(coat in Korea in the past) in the 16th to 17th century, this study investigated 12 items from Bae Cheon-jo's tomb(Sibok, Dopo(robe), Jungchimak(outer coat with large sleeves) and Gwa-du and 5 items(Jangok(lady's cloak) and Jungchimak) from Mrs. Nam's tomb of Go-seong. For sewing, broad-stitching, hemming and even-back-stitching were used the most in that order. Furthermore, various kinds of sophisticated stitching including old flat felled seam, decorative saddle stitching and buttonhole stitch, clothing made roughly as a shroud and fabric attached on the clothing were also observed. We may not have many opportunities to understand the change of clothing in Korea from mid 16th century to mid 17th century through the clothing of father-in-law and daughter-in-law in a family. As a result, we will be able to understand the features of sewing in a family and from the 16th century to the 17th century.

• The Journal of Internal Korean Medicine
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• v.11 no.1
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• pp.41-52
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• 1990

After intravenous administration of Se Pye San water extract in the rabbit, the change of plasma cortisol concentration, arterial blood $PCO_2$ and $PO_2$ was obtained such results as follows. 1. The plasma cortisol concentration in the control group was constant, but after intravenous administration of Se Pye San water extract at the dose of 0.2 ml/kg, the above concentration was increased significantly from 2 to 3 hours. Also, the above concentration was increased remarkably at the dose of 0.4 ml/kg from 1 to 4 hours. 2. After intravenous administration of Se Pye San water extract at each dose of 0.2 ml/kg and 0.4 ml/kg, arterial blood $PCO_2$ was decreased remarkably from 1 to 4 hours. 3. No change after intravenous administration of Se Pye San water extract at the dose of 0.2 ml/kg, while arterial blood $PO_2$ was decreased significantly at the dose of 0.4 ml/kg on 3 hours. As a results of the above, the therapeutic action of Se Pye San water extract effected with Jisu (止嗽), Jeong Cheon (定喘), Geo Dam, Cheong Yeol (淸熱) would be related with the increased both plasma cortisol concentration and arterial blood $PO_2$, and the decrease of arterial blood $PCO_2$.

• The Journal of Internal Korean Medicine
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• v.11 no.2
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• pp.43-52
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• 1990

The following results were obtained from the observation on the change of plasma cortisol concentration and arterial blood $PO_2,\;PCO_2$ in the experiment of intravenous and oral administration of Chung Sang Bo Ha Tang Water Extract in the rabbit. 1. In intravenous administration, the plasma cortisol conce-ntration increased significantly about 2 hours after with a dose of $0.2m{\ell}/kg$, while the case of $0.4m{\ell}/kg$ reveals this significant increase of concentration about 3 hours after. 2. In oral administration, a significant increase of the plasma cortisol concentration was shown about 2 and 4 hours after with a dose of $1.2m{\ell}/kg$, on the other hand, an increase of concentration was shown at each hour in the case of $0.2m{\ell}/kg$, but it was not significant. 3. In oral administration, $PO_2$ in arterial blood increased significantly in the case of $0.2m{\ell}/kg$, and both the case of $0.1m{\ell}/kg$ and that of $0.2m{\ell}/kg$ gave a significant decrease of $PCO_2$ in arterial blood. With these results, it is verified that Chung Sang Bo Ha Tang has therapeutic effects on JISU(止嗽), JEONG CHEON(定喘), GEO DAM(祛痰) because intravenous and oral administration of it increases the plasma cortisol concentration, However, in the examination of $PO_2$ and $PCO_2$ in arterial blood, any remarkable result was not obtained.