• Proceedings of the Korean Society of Developmental Biology Conference
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• 2005.10a
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• pp.70-71
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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.70-71
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• 2005

• The Korean Journal of Quaternary Research
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• v.2 no.1
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• pp.13-24
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• 1988

The deposit (named Kanweoldo deposit) unconformably overlain by the Holocene tidal deposit is mainly exposed along the tidal channel of the Sajangpo tidal flat of Cheonsu Bay, west coast of Korea. The Kanweoldo deposit's sedimentary textures, sedimentary structures and erosion surfaces of the stratigraphic events have been investigated. The Kanweoldo deposit is mainly composed of mud, silt and sandy mud. The sedimentary criteria indicating intertidal deposit i.e. lenticular bedding, thinly and coarsely interlayered bedding, wavy lamination and flaser bedding are positively found in the Kanweoldo deposit. The deposit is semi-consolidated and brown in color, and has erosional contact (stratigraphic boundary) with the overlying Holocene tidal deposit. Considering such Kanweoldo deposit's sedimentary characteristics and stratigraphic relation with the Holocene tidal deposit, the Kanweoldo deposit seems to be deposited under intertidal environment during Riss-Wurm interglacial period and subaerially exposed and eroded during the last glacial period.

• The Korean Journal of Quaternary Research
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• v.14 no.2
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• pp.125-135
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• 2000

The late Quaternary stratigraphy and basal unconformity (nonconformity) of the intertidal deposits (upper tidal flat) in the Banweol tidal basin in the Kyunggi Bay, west coast of Korea has been investigated and established. The Unit I (middle to late Holocene upper intertidal deposit) and Unit II (pre-Holocene fluvial to alluvial deposit) in descending order are classified and interpreted. The basement rocks of the Banweol tidal basin is dominantly preCambrian metamorphic rocks on which Unit II is overlying unconformably. In short, the late Quaternary stratigraphy and unconformity of the Banweol tidal flat deposits are established and interpreted in terms of sedimentology and sea-level fluctuation history during late Quaternary.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 1998.06a
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• pp.139.1-140
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• 1998

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 1997.06a
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• pp.173.1-174
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• 1997

• Proceedings of the Korean Society of Environment and Ecology Conference
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• 2006.04a
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• pp.140-142
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• 2006

• Proceedings of the KGS Conference
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• 2005.05a
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• pp.47-49
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• 2005

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.12
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• pp.112-117
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• 2017

Interest in the development of renewable energy sources has been increasing over the past 10 years and the west coast of Korea is one of the most favorable regions for tidal power. Barrage type tidal power is representative of the experience of installation and operation of such power sources for long periods. However, future projects for barrage type energy sources are either delayed or closed due to their environmental impact. For this reason, we applied a new tidal power technology with minimized environmental impact to a candidate area in the west coast and then analyzed its feasibility. The new tidal power technology is called Dynamic Tidal Power (DTP). Because its verification is impossible both in the laboratory and field, a numerical model is used for the evaluation of DTP. This new technology produces tidal power by means of the phase difference caused by diffraction on both sides of a dike built tens of km away from the coast. Because DTP is theoretically able to almost double the tidal range, it is expected to be applicable to even a small tidal area. Unlike the barrage type, it has the advantage of reducing the environmental impact by not enclosing the sea water. The west coast of Korea is close to the metropolitan area and has a high tidal range and, thus, it is thought to be a suitable candidate for tidal power.

• Development and Reproduction
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• v.17 no.3
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• pp.247-255
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• 2013

The gonadsomatic index (GSI) of mottled skate was the highest in April, GSI and HSI showed a reverse phase for its reproductive cycle. The fish had one pair of egg capsules, having 1 to 7 fertilized eggs, and spawned all the year round. When surveying the reproductive characteristics of females over 63 cm in disc width, we found the spawning peak was between April to June, and the appearance ratio of egg capsules was the highest in May (32.1%). The eggs were hatched at $8^{\circ}C$, $13^{\circ}C$, $18^{\circ}C$, water temperature (12.8 to $24.2^{\circ}C$), and the best hatching temperature was $18^{\circ}C$. The number of fish hatched was 4 to 5 fish/egg capsules, and the hatching rate was 100%. The sex ratios of hatching larvae were 45.5% female and 54.5% male. Therefore this study will provide fundamental data and information for artificial reproduction of the mottled skate.