• Journal of The Korean Society of Agricultural Engineers
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• v.52 no.3
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• pp.9-17
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• 2010

This study aims to evaluate a porous concrete using hwang-toh, blast furnace slag and blast furnace slag (BFS) cement instead of type I cement. The tests that were carried out to analysis the properties of porous hwang-toh BFS cement concrete included compressive strength, continuous void ratio, absorption rate, and pH value, repeated freezing and thawing test were conducted. Test results indicated that the performance in porous hwang-toh concrete are effective on the kaoline based binder materials. The pH value were shown in about 9.5 ~ 8.5. The compressive strength was increased and void ratio was decreased with increasing the kaoline based binder materials, respectively. The void ratio and compressive strength were in the range of about 21 ~ 30 %, 8 ~ 13 MPa, respectively. The increased in void ratio of more than 25 % is showed to reduce the resistance of repeated freezing and thawing. Also, the resistance of repeated freezing of thawing and the compressive strength of porous hwang-toh BFS cement concrete are independent with hwang-toh content and BFS cement amount. But, the void ratio was decreased with increasing the high volume hwang-toh contents (more than 15 %).

• Proceedings of the PSK Conference
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• 2003.04a
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• pp.153.2-154
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• 2003

Pathophysiological elevation of intracellular calcium concentration ([$Ca^{2+}$]$_i$) in the neuron has been considered as an important responsible factor in the neuronal cell damages. However, the mechanism of increase of [$Ca^{2+}$]$_i$ through ryanodine receptor (RyR), the relationship between [$Ca^{2+}$]$_i$ level and cell damages have not been fully demonstrated. (omitted)

• Proceedings of the SAREK Conference
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• 2004.06a
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• pp.216-216
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• 2004

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2010.05a
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• pp.1245-1246
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• 2010

• 대한임상약리학회:학술대회논문집
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• 1994.12a
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• pp.30-30
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• 1994

• Proceedings of the Korean Fiber Society Conference
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• 1992.06b
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• pp.10-11
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• 1992

• Proceedings of the Zoological Society Korea Conference
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• 1996.10a
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• pp.187.2-187
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• 1996

No Abstract, See Full Text

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2008.11a
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• pp.340-347
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• 2008

Recently the consideration for occupant's security has been raised as very important design element from the fire by building's large sized, higher storied, and its compounded. But the domestic laws regulated the predicative laws according to the technical standard which has no difference from the past domestic evacuation regulation. Therefore, regulation of escape code and developing technology for Korean conditions are needed to reduce victims during disaster by protecting occupant and guiding people to safe places.

• Proceedings of the Korean Society of Developmental Biology Conference
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• 2005.10a
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• pp.41-41
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• 2005

• Proceedings of the Korean Society of Embryo Transfer Conference
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• 2005.10a
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• pp.41-41
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• 2005