• Proceedings of the Korean Society of Embryo Transfer Conference
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• 2005.10a
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• pp.116-116
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• 2005

• Proceedings of the Korea Society of Environmental Toocicology Conference
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• 2001.05a
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• pp.126-126
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• 2001

Over the last few years, an increased awareness of endocrine disrupting chemicals (EDCs) and their potential to affect wildlife and humans has produced a demand for practical screening methods to identify endocrine activity in a wild range of environmental and industrial chemicals. It is clear that in vivo methods will be required to identify adverse effects produced by these chemicals. (omitted)

• Proceedings of the Microbiological Society of Korea Conference
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• 2003.05a
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• pp.38-38
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• 2003

• Proceedings of the Korean Magnestics Society Conference
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• 2009.05a
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• pp.77-78
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• 2009

• 한국약용작물학회:학술대회논문집
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• 2009.05a
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• pp.309-310
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• 2009

• Magazine of the Korean Society of Agricultural Engineers
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• v.24 no.2
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• pp.56-66
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• 1982

This study was carried out in order to estimate water losses in irrigation canals, which may be used to evaluate the water requirement for irrigation projects. The conveyance losses were measured by the inflow-outflow method, the seepage losses were measured by the ponding method, and the operation losses in the course of irrigation were calculated by comparing the two kinds of losses. The results obtained in this experiment were as follows; 1. Conveyance losses per unit area of wetted perimeter by the main irrigation canal, the secondary irrigation canal and the tributary irrigation canal, were 1.399${\times}10^{-5}m^3/sec/m^2$, 5.154${\times}10^{-5}m^3/sec/m^2$, and 2.67${\times}10^{-5}m^3/sec/m^2$ respectively in the Goong-sa area. And they were 1.934${\times}10^{-5}m^3/sec/m^2$, 2.149${\times}10^{-5}m^3/sec/m^2$, and 4.558${\times}10^{-5}m^3/sec/m^2$ respectively in the Seong-dug area. 2. Seepage losses per unit area of wetted perimeter by the secondary irrigation canal and the tributary irrigation canal, were 2.180${\times}10^{-6}m^3/sec/m^2$ and 2.168${\times}10^{-6}m^3/sec/m^2$ in the Goong-sa area, 1.150${\times}10^{-6}m^3/sec/m^2$ and 1.084${\times}10^{-6}m^3/sec/m^2$ in the Seong-dug area respectively. 3. Operation losses per unit area of wetted perimeter by the secondary irrigation canal and the tributary irrigation canal, were 4.936${\times}10^{-5}m^3/sec/m^2$ and 2.453${\times}10^{-5}m^3/sec/m^2$ in the Goong-sa area, 2.034${\times}10^{-5}m^3/sec/m^2$ and 4.450${\times}10^{-5}m^3/sec/m^2$ in the Seong-dug area respectively. 4. Conveyance, seepage and operation losses in the Goong-sa area were 6.7%, 94.6%, and 14.0% more than those in the Seong-dug area. Operation losses amount to about 17 times as much as seepage losses in the Goong-sa area and about 29 times in the Seong-dug area. 5. The seepage losses depend much on the soil texture, ranging from 7.437${\times}10^{-7}m^3/sec/m^2$ to 2.430${\times}10^{-6}m^3/sec/m^2$. 6. Water loss rates in the main irrigatin canal, the secondary irrigation canal and the tributary irrigation canal, were estimated as 8.49%, 37.27% and 9.81% respectively in the Goong-sa area. And they were estimated as 15.10%, 32.67% and 13.78% respectively in the Seong-dug area.

• The Journal of Internal Korean Medicine
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• v.16 no.1
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• pp.81-103
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• 1995

Study on Pulmonary emphysema based on literature and thesis, etc. Knowing the cause of the oriental medicine and treatment. The results were obtained as follows: 1. In the oriental medicine, we could find that emphysema was similiar to Pye-Chang, Huh-Chun. Sang-Qi, Dan-Qi, So-Qi. 2. The cause was divided to asthenia of the lung and kidney, yang-asthenia of the spleen and kidney with energy-asthenia of the lung as the root, and sputum(痰) had been important in the early period of disease, extravasated blood in the latter period. The proximate cause was clonic pulmonary disease, smoking, air pollution. occupation and symptoms of senility, congenital cause etc. 3.The treatment was divided to Gang-Qi-Wha-Dam, Whal-Hyul-Wha-Eo, Jin-Hae-Pyung-Chun in progress of disease and it was divided to Geon-Bi, Nab-Qi, On-Yang, Yang(養)-Eum, Qi-Eum-Ssang-Bo in relieve period. 4.The medicine used to Bu-Bi-Seng-Maek-San, Jo- Jung-Ik-Qi-Tang, Jung-Won-Eum, Geum-Guae-Sin-Qi-Whan, Jin-Mu-Tang, Yuk-Mi-Whan and So-ja-Gang-Qi-Tang, Pae-Mo-Tang, Ja-Won-Tang, Do-Dam-Tang, Chun-min-Tang, Jeon-Ho-Tang etc. The popular used medicine used to Bo-Pae-Tang, Pyung-Chun-Go-Bon-Tang, In-Sam-Hap-Gae-San-Ga-Gam, In-Sam-Yun-Pae-Won, Jung-Chun-Tang, Bo-Shin-Lee-Pae-Tang etc. Exogenous pathogenic fact and increasing of symptom used to Sam-So-Eum, Sang-Gook-Eum, Wol-Bi-Ga-Ban-Ha-Tang, Sa-Baek-Tang, Ma-Hwang-Tang etc.

• Korean Journal of Ecology and Environment
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• v.35 no.1 s.97
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• pp.28-35
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• 2002

The effect of physical parameters on water quality was analyzed using monitoring data of 193 agricultural reservoirs. The retention time of reservoirs ($t_d$) ranged between 10 and 140 days, and the ratio of drainage area (DA) to reservoir surface area (SA) was between 10 and 120. Both ratios of DA/SA and total area (TA)/ reservoir storage (ST) in Korean agricultural reservoirs were relatively greater than those in natural lakes in other countries. As retention time was plotted against DA/SA ratio, it was shorter in Korean reservoirs than natural lakes. The semi-logarithmic relationship between TA/SA and t>$t_d$ was $t_d\;=\;42.21(TA/ST)^{-1}$ (n = 50, $R^2\;=\;0.89$). While areal loading of total phosphorus (TP) was below $4\;gTP{\cdot}m^{-2}{\cdot}yr^{-1}$ in general, it exceeded $10\;gTP{\cdot}m^{-2}{\cdot}yr^{-1}$ in reservoirs where DA/SA ratio was greater than 100, which implies that areal loading of TP increases as DA/SA ratio increases. Chl-a concentration was positively related with the mean depth of reservoir, implying the higher Chl-a concentration with deeper the mean depth. Therefore, the deeper reservoir might be advantageous in water quality management perspective if other morphological conditions are similar. The empirical regression equation using physical parameters was also suggested in the estimation of TP concentration in the reservoirs. Combined information presented in this paper might be applicable to the water quality management in agricultural reservoirs.

• Environmental Analysis Health and Toxicology
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• v.22 no.4
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• pp.299-304
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• 2007

This paper was studied to investigate the equilibrium state between organochlorine pesticides (OCPs) concentration of air and soil, and to know whether soil is a secondary pollution source of OCPs in air or not. The OCPs concentration of air ($C_{air}$) and soil ($C_{soil}$) is not related to molecular weight, vapor pressure ($P_L$) and octanol-air partition coefficient ($K_{oa}$). The slope of the regression line between soil-air partition coefficient ($K_{sa}$) and scavenging coefficient ($C_{soil}/C_{air}$) was 0.2952, which the OCPs concentration between air and soil did not reached to the equilibrium state. The soil/air fugacity quotients ($f_{soil}/f_{air}$) of p, p'-DDT/DDD/DDE and ${\beta}-HCH\;(0.30{\sim}0.67$), which is smaller than 1, means the deposit of OCPs from air to soil. However, $f_{soil}/f_{air}$ of heptachlor, heptachlor epoxide, ${\alpha}/{\gamma}-chlordane$, trans-nonachlor, endosulfan sulfate and ${\alpha}/{\gamma}-HCH\;(1.90{\sim}73.25)$, which is greater than 1, means that soil is secondary pollution source of OCPs in air.

• Land and Housing Review
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• v.6 no.1
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• pp.21-29
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• 2015

Coupling beams posses proper strength, stiffness and ductility capacities to resist efficiently under seismic loads. The strength, stiffness and ductility capacities for special diagonally reinforced concrete coupling beam with a span-to-depth ratio 2.0 or less is higher than those of coupling beam with conventionally reinforced concrete coupling beam. However, diagonally reinforced detailing creates major construction problem. In this study, design alternatives for diagonally reinforced concrete coupling beams were experimentally investigated. The results show that angle reinforced coupling beam(specimen SA) exhibited a better stable behavior in comparison with non-diagonally coupling beams(specimens SB-series) and sustained corresponding drift ratio, peak-to-peak stiffness and cumulative dissipated energy in comparison to diagonally coupling beam(specimen CA).