• Journal of The Geomorphological Association of Korea
• /
• v.17 no.1
• /
• pp.85-93
• /
• 2010

After the notorious Taean Oil spill in Dec. 2007, a series of sand fences made of fishing net were installed in front of foredune in Shindu dune area. This paper aims to understand the temporal and spatial characteristics of morphological changes of the beach and foredune. About 1m high sand accumulated around sand fences for the last 2 years. While a lot of sand deposited during the winter season (from autumn to spring), small amount of sand eroded and deposited during summer season (from spring to autumn) without big morphological changes. These results mean that sand fences help nature deposit sand near beach and foredune area.

• Journal of the Korean Geographical Society
• /
• v.47 no.2
• /
• pp.193-207
• /
• 2012

This study discussed characteristics of Shindu Coastal Dune as habitat, and relationship between geodiversity and biodiversity. It was identified spatio-temporal variation of incoming nutrients depended on geomorphic differences of foredunes. The main incoming path of nutrients into coastal dune was considered as influx with movement of wind blown sands from the beach and tidal f lat. Concentrations of Na, Mg, K, Ca, and P in blown sands were compared. Concentrations of Na, Mg, and K showed high and irregular pattern in favorable condition of influx of blown sand. So these nutrients were related with geomorphic characteristics of foredunes. However, Na was also influenced by other factor such as salt spray. P was independent from effects of sea water and blown sands. In the case of Ca, a large coastal dune system rather than localized forms of foredunes made differences in the variation. Due to differences in spatio-temporal variation of nutrients, patterns of major vegetation could be inferred to appear differently. This study shows geomorphic dynamics of coastal dunes as habitat, and will provide information for coastal dune management and for understanding biological distribution and growth pattern in coastal dune.

• Venture DIGEST
• /
• s.27
• /
• pp.4-5
• /
• 2003

코인텍(대표 서진구)은 1999년 설립된 ERP(전사적 자원관리)전문업체다. 세계 최초로 닷넷 플랫폼을 채택한 웹 ERP 패키지(브랜드명‘Eagle’)를 개발, 미쓰이 그룹을 비롯한 일본의 유수 기업에 수출함으로써 소프트웨어 벤처기업의 새로운 비전을 제시했다.

• Journal of The Geomorphological Association of Korea
• /
• v.19 no.4
• /
• pp.109-122
• /
• 2012

Topographic changes in the foredune in Sohwang-ri, Boryeong, Chungnam Province was analyzed over the last two years. Seven cross-sections and one permanent plot ($20m{\times}50m$) were periodically studied based on erosion and deposition measurement, in addition to vegetation monitoring and measurement of wind using an automatic weather station. The sand dunes usually grew from late winter to spring and the growth occurred in a period of strong northwesterly winds. From March to April, heavy sedimentation was observed on the front section of the foredune and sand piled up to ca. 30cm to the ca. 25m landward from the high tide line. It is likely that increased wind force and growth of vegetation played a major role in transportation and sedimentation of sand. Meanwhile, the lower part of the sand dunes was eroded when typhoon and spring tide caused a rise in sea level. The transition zone of beach and dune was usually affected by sea water but some frontal slopes were entirely influenced, resulting in dune scarps. The eroded scarps were naturally restored to their original state as time passed.

• Journal of the Korean Geographical Society
• /
• v.50 no.4
• /
• pp.375-391
• /
• 2015

Trees to arrest sand-shifting have been planted on most of coastal dunes in Korea and considered as conservative objects. However, we reconsider that the simplicity of these trees have hindered ecological roles of coastal dunes; geochemical cycle and habitats of endemic species in coastal ecosystem. We examined geochemical properties of sediments on Byunsuran dune field where is planted with pine trees. There are significant difference in properties between embryo dune sediments and foredune sediments, but there are not between foredune and secondary dune. There are no significant difference between pine forest sediments and mixed forest sediments. It is also not showed the difference between dune ridge sediments and swale sediments. Despite spatial diversity from appearance, geochemical properties are not linked with geomorphic and vegetational conditions because of dense planted trees on foredune. To recover natural properties of coastal dunes, we need to change the conservation scheme to increase geomorphic and ecological diversity.

• Journal of the Korean association of regional geographers
• /
• v.12 no.6
• /
• pp.631-644
• /
• 2006

The study area is a pocket beach which consisted of sandy beach, dune, agricultural land and residential area etc. The coastal dune area is classified to foredune, dune plain, secondary (or back) dune. The foredune area is covered by herbaceous dune plants(ex. Carex kobomugi, Wedelia prostrata, etc.), whereas the dune plain area is covered by herbs and shrubs(Vitex rotundifolia). The most inner area, secondary dune, is planted by pine forest(Pinus thunbergii). The mean size of the beach and dune sediments ranges from 1.1 to $1.8{\Phi}$, which mean these values are higher than normal sediments. Sorting and Skewness is $0.6{\sim}-1.2{\Phi}$ and $-2.7{\sim}1.6{\Phi}$ respectively. We found that the soil formation process in the secondary dune area has been progressed rapidly from the analysis of fine grain content, organic matter content, and CEC.

• Journal of the Korean association of regional geographers
• /
• v.10 no.3
• /
• pp.667-681
• /
• 2004

This research is aimed to investigate the relationship of the effective wind velocity and the morphological change in coastal dune at Sindu-ri in Korea. Sediment flux was estimated by the measurement of elevation change along eight transects deployed in the study area from July 1999 to July 2000. The results of this study indicated that. first. based on the occurrence of morphological change and winds effective for sand movement. two distinct seasons were identified: a season of deposition and that of erosion. During the depositional season, spanning from November to April, effective winds were dominant and sand accumulation occurred mainly in foredunes and sequentially in dune plains. During the erosional season, from May through October, volume change was small and erosion or sand loss occurred mostly at the dunefoot of foredunes. Secondly, the research revealed that the sediment budget of Sindu coastal dune turned out to be surplus on the whole, but there are some regional differences. Deficit budgets were observed partly in secondary dunes. The utmost northern part of Sindu coastal dune was provided with abundant sand, whereas the central and northern parts were poorly supplied.

• Journal of the Korean Geographical Society
• /
• v.39 no.2
• /
• pp.269-282
• /
• 2004

Luminescence dating of a coastal dune from the Shindu dunefield on the T'aean Peninsula shows that deposition of the dune structure began about 500-600 years ago. The lower section of the dune has remained stable since then but the upper part yields an age of about 30 years, suggesting reactivation or additional deposition since the 1970's. The two samples that were collected from the lower part of the dune at depths of 3.5 m and 2.0 m below the surface differ by an age interval of about 50-70 years. This indicates a net depositional rate of around 2.5 cm a year which is relatively slow for a coastal dune. Whilst only one dune structure has been dated for the time being and even though the dunefield was probably established much earlier in the Holocene, the OSL ages obtained demonstrate that some dunes in the area could be younger than 1000 years. Such chronologies point to a dynamic environment where the dune structures are not permanently fixed. Sedimentological properties of the dune sands are consistent with those of particles initially deposited under subaqueous conditions and then later transported by wind.

• The Journal of Natural Sciences
• /
• v.11 no.1
• /
• pp.89-94
• /
• 1999

ALG-2 (apoptosis linked gene-2) is a 22 kDa calcium-binding protein necessary for apoptosis induced by various stimuli in lymphocyte. The transactivation of human ALG-2 was assessed in yeast as a fusion protein with the DNA binding domains (DBDs) of LexA. The C-terminal of hALG-2 (93-191 amino acid) exhibited transacitivation of the reporter gene, LacZ, whereas the full-length hALG-2 (1-91 amino acid) and its N-terminal (1-98 amino acid) did not. The transactivation of LacZ reporter was driven more strongly (more than 2.7-fold increase) by the C-terminus of hALG-2 than by the B42, as a positive control for transactivation. Hence, our data suggested a possible regulatory role of the N-termini of hALG-2 upon transactivation.

• Journal of Life Science
• /
• v.19 no.4
• /
• pp.514-519
• /
• 2009

Monocyte chemoattractant protein 1 (MCP1) plays a key role in monocyte /macrophage infiltration to the sub-endothelial space of the blood vessel wall, which is a critical initial step in atherosclerosis. In this study, we examined $interleukin-1{\bate}$ ($IL-1{\beta}$) induced MCP1 expressions via activation of transcription factor $NF-{\kappa}B$ in primary human aorta smooth muscle cells. We determined the effect of several anti-inflammatory agents on $IL-1{\beta}-induced$ MCP1 expression. The pretreatment of luteolin significantly suppressed $IL-1{\beta}-induced$ MCP1 expressions through blocking activation and translocation of $NF-{\kappa}B$ to the nucleus.