• 해안과 해양
• /
• 제3권2호
• /
• pp.5-12
• /
• 2010

• 해안과 해양
• /
• 제6권2호
• /
• pp.36-41
• /
• 2013

• 해안과 해양
• /
• 제5권2호
• /
• pp.62-70
• /
• 2012

• 한국해안해양공학회:학술대회논문집
• /
• 한국해안해양공학회 2000년도 한국해안해양공학발표논문집 Proceedings of Coastal and Ocean Engineering in Korea
• /
• pp.113-119
• /
• 2000

Internal waves, including all kinds of wave phenomena inside a stratified fluid system, have been a subject of interest for a long time in geophysics, coastal and ocean engineering, applied mathematics and hydrodynamics. The vast oceans on the earth are a complex stratified fluid system widely distributed with pycnoclines, which are horizontally layered regions with a large density variation, commonly located about 50-150 meters below the ocean surface. (omitted)

• 한국해안해양공학회:학술대회논문집
• /
• 한국해안해양공학회 1994년도 정기학술강연회 발표논문 초록집
• /
• pp.116-120
• /
• 1994

• 한국해안해양공학회:학술대회논문집
• /
• 한국해안해양공학회 1996년도 정기학술강연회 발표논문 초록집
• /
• pp.109-114
• /
• 1996

In a linear dispersive system, the combined effect of water wave frnnsformations such as refraction, diffraction, shoaling, and reflection can be predicted by the mild-slope equation which was developed by Berkhoff (1972) using the Galerkin-eigenfunction method. In the derivation of the equation, he assumed a mild slope of the bottom $\nabla$h/kh << 1 (where $\nabla$ is the horizontal gradient operator, k is the wavenumber, and h is the water depth) and thus neglected second-order bottom effect terms proportional to O($\nabla$h)$^2$ and O($\nabla$$^2$h). (omitted)

• 한국해안·해양공학회논문집
• /
• 제22권4호
• /
• pp.235-240
• /
• 2010

발전소 배수로에서 방류되는 냉각수에 의하여 발생하는 거품은 시각적인 공해를 유발하여 인근 주민들의 민원 소지가 되고 있다. 본 연구에서는 배수로에서 발생하는 거품발생량을 저감하기 위한 효과적인 방안을 제안하기 위하여 테트라포드(TTP)를 배수로 경사면에 배치하여 수리모형실험을 실시하였다. 수리모형실험의 주요 결과를 실제 발전소 배수로 현장에 적용하여 정성적인 거품발생량 저감 효과가 있음을 확인하였다.

• 한국해양공학회지
• /
• 제17권2호
• /
• pp.1-7
• /
• 2003

A common feature in the three-dimensional numerical model experiments of coastal discharge with simplifed model and idealized external forcings is investigated. The velocity fields due to the buoyancy and flow flux, are spreaded radiately and the surface velocites are much greater than homegeneous discharges. The coastal dischargd due to the Coriolis force and flow flux are shaped a anticyclical gyre (clockwise) and determined the scale of the gyre in the coastal zone, respectively. The bottom topography restricts a outward extention of the coastal fronts and it accelerates a southward flow.

• Food Science and Biotechnology
• /
• 제14권6호
• /
• pp.798-802
• /
• 2005

Crude extracts of thirty seaweeds collected in Korea were obtained using 50% ethanol, and total phenolic contents and antioxidant activities were compared. Two brown algae, Ecklonia cava (E. cava) and Sargassum siliquastrum (S. siliquastrum), showing high antioxidant activity based on 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity and superoxide anion radical scavenging activity were further investigated for their inhibitory effects on tyrosinase activity. The E. cava extract had the highest total phenolic content among the seaweeds extracts. Total phenolic contents were strongly correlated with antioxidant activity in the thirty seaweed extracts ($R^2\;=\;0.9169$). The E. cava and S. siliquastrum extracts exhibited higher inhibition to tyrosinase activity than butylated hydroxytoluene (BHT) and epigallocatechin gallate (EGCG).

• 환경영향평가
• /
• 제18권3호
• /
• pp.185-193
• /
• 2009

This study documented and diagnosed the status and problems of coastal dredging and offshore disposal of dredged sediments in South Korea to improve assessment procedures for marine environmental impacts and develop effective management systems. A total of $729({\times}10^6)m^3$ of coastal sediment was dredged in the harbors during the period of 2001-2008. Most of dredged sediment was disposed to the land dumping sites whereas ocean disposal accounted for less than 5%. Ocean disposal areas were especially concentrated to the exclusive economic zone (EEZ) in the southeast of Busan, which is not only an important fishing area for fishermen, but also considered to be spawning and nursery ground for some commercial fish species. To minimize negative impacts of dredging and ocean disposal of coastal sediment on marine ecosystem and potential strife among coastal users, we suggest 1) in development projects involving ocean disposal, it should be mandatory to propose careful reuse plans in the land, and 2) guidelines of environmental assessment and consequence management programs should be developed and implemented.