• Proceedings of the Plant Resources Society of Korea Conference
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• 2019.10a
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• pp.51-51
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• 2019

참취(Aster scaber)는 국화과에 속하는 여러해살이식물로 취나물로 분류되어 전국에서 재배되고 있으며 주로 남부지역에서 조기재배 작형으로 많이 재배하고 있다. 참취의 잎과 줄기는 맛과 향기가 독특하여 예로부터 생채, 묵나물 등으로 이용되어 왔으며 칼슘, 철분, 비타민 A 등이 풍부하여 건강식품으로서도 가치가 높고 한약재로도 사용되기도 한다. 최근에는 항암효과와 더불어 콜레스트롤을 저하시키는 약리적 효능이 있는 것으로 밝혀져 기능성 식품으로도 각광 받고 있다. 참취 시설재배 시 통상 3년 마다 갱신이 이루어지고 있는데 그 이유로는 시설재배지 특성상 양분의 과다투입에 의한 염류집적과 잦은 관수로 물리성이 악화되어 참취의 생육이 저하되어 수량이 감소하는 결과를 초래한다. 본 연구는 토양개량제 처리에 따른 참취의 생육과 토양 물리화학성에 미치는 영향을 검토하여 참취 시설재배 농가에 활용할 수 있는 방안을 개발하고자 시험을 수행하였다. 2018년 4월부터 2019년 9월까지 전라북도 농업기술원 허브산채시험장에서 참취 시설재배를 대상으로 하고 무처리, 볏짚 1,000 kg/10 a, 왕겨 숯 1,000 kg/10 a, 야자섬유 1,000 kg/10 a, 4처리구로 하여 시기별 생육 및 토양특성을 조사하였다. 수확기 참취 생육특성은 초장은 25.6~27.2 cm, 엽장은 8.5~9.7 cm, 엽폭은 6.3~7.0 cm, 경직경은 4.3~4.6 cm, 및 수량은 $3.3{\sim}4.0kg/3.3m^2$으로 볏짚 처리구에서 대조구에 비해 좋은 생육 상황을 보였으며 수량성 또한 많았다. 시험 후 토양화학적 특성을 조사한 결과 토양 pH는 7.4~7.5, 토양유기물 함량은 34~36 g/kg, 유효인산 함량은 386~415 mg/kg 이었으며 처리 전 토양에 비하여 유기물 함량은 증가하고 유효인산은 낮아지는 경향을 보였다. 치환성 양이온 K, Ca, Mg는 K는 $0.8{\sim}1.0cmol_c/kg$로 낮아졌고, Ca와 $8.9{\sim}10.1cmol_c/kg$, Mg는 $3.1{\sim}3.4cmol_c/kg$로 증가하였다. 토양물리성의 변화는 왕겨숯 시용에서 대조구에 비해 가장 낮은 용적밀도 $1.22g/cm^3$와 가장 높은 공극률 54.09%을 보였다. 토양 삼상은 고상은 볏짚에서 51.98%로, 액상은 야자섬유에서 28.64%로, 기상은 왕겨숯에서 29.35%로 가장 높았다. 참취 시설재배지 토양개량제 시용함으로써 토양의 유기물함량 증가와 토양의 용적밀도 감소와 토양양 공극율 증가 등 토양의 물리 화학성을 개선할 수 있을 것으로 기대된다. 본 연구는 2년차 시험 결과로서 3년차에 재검토할 계획이다.

• Journal of the Korean Society of Marine Environment & Safety
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• v.20 no.6
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• pp.609-618
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• 2014

We have been studied for geographic distribution, dominance and inhabitation characteristics of marine algal species at intertidal zones of Geojin in the northern part of east coast of Korea, Jukbyeon in the middle part and Gampo in the southern part in May and August 2014. For the geographic distribution, the three areas (Geojin, Jukbyeon and Gampo) were a characteristic of the temperate region. Geojin dominated with Ulva pertusa and Chaetomorpha moniligera, Jukbyeon dominated with C. moniligera and Chondria crassicaulis, Gampo dominated with Sargassum thunbergii, U. pertusa and Ectocarpus species. C/P, R/P and (R+C)/P, which can represent the marine algal flora, were 0.85, 2.10, 2.94 in Geojin, 0.58, 3.15, 3.73 in Jukbyeon and 0.80, 3.91, 4.71 in Gampo. As a result of cluster analysis, Those regions were divided in two groups, which were a group A of Geojin and group B of Jukbyeon and Gampo. This result was well matched with Jukbyeon and Gampo shared their temperate region character in the geographic distribution study.

• Journal of the Korean Society of Marine Environment & Safety
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• v.20 no.6
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• pp.601-608
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• 2014

The purpose of this study was to explore the long-term variability of sea surface temperature (SST) and cluster analysis derived from in-situ data in the coastal oceanographic observation 8 stations (Sokcho, Jumunjin, Donghae, Jukbyeon, Pohang, Janggigab, Ulgi, Gampo) of the East Sea during 1971-2013. As a result of cluster analysis, SST variations in each area could be divided into two groups, which was a group A of Sokcho, Jumunjin, Donghae, and group B of Jukbyeon, Pohang, Janggigab, Ulgi, Gampo. The SST and SST anomalies at Sokcho, Jukbyeon, Pohang and Gampo during 1971-2013 showed the increase-trend with the variations of decadal-scale. Annual SST values also increased remarkably after 1988. The increases of SST for 43 years showed $2.26^{\circ}C$ at Sokcho, $1.99^{\circ}C$ at Jukbyeon, $1.11^{\circ}C$ at Pohang and $0.89^{\circ}C$ at Gampo. In particular, the SST variations of the northern areas were higher than those of southern areas. The seasonal SSTs increased the order of Sokcho-Jukbyeon-Pohang-Gampo in fall and winter and that of Jukbyeon-Sokcho-Pohang-Gampo in spring and summer.

• Geophysics and Geophysical Exploration
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• v.13 no.2
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• pp.153-158
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• 2010

To investigate the velocity structure in the central and southern parts of the Korean peninsula, a 299-km NW-SE seismic refraction profile KCRT-2008was obtained across major tectonic boundaries. Seismic waves were generated by detonating 250 ~ 1500 kg explosives at depths of 50 ~ 100 m in eight drill holes located at intervals of 21 ~ 113 km. The seismic signals were detected by 4.5 Hz geophones at a nominal interval of 500 m. The first-arrival times were inverted to derive a velocity tomogram. The raypaths indicate several mid-crust interfaces including those at approximate depths of 2 ~ 3, 11 ~ 13, and 20 km. The Moho discontinuity with refraction velocity of 7.7 to 8.1 km/s has a maximum depth of 34.5 km under the central portion of the peninsula. The Moho becomes shallower as the Yellow Sea and the East Sea are approached on the west and east coasts of the peninsula, respectively. The depth of the 7.6 km/s velocity contour varies from 31.3 km to 34.4 km. The velocity tomogram shows the existence of a 129 km wide low-velocity zone centered at 7.2 km depth under the Okchon fold belt and Gyeonggi massif and low-velocity(< 5.4 km/s) rocks in the Gyeongsang sedimentary basin with a maximum thickness of 2.6 km

• Proceedings of the KSR Conference
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• 2008.11b
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• pp.1900-1906
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• 2008

According as zone of life of big city is expanded by new city development etc.., need special skill master plan compensation which can be systematic for wide area traffic problem solution and confusion expense minimization in the metropolitan area because wide area of capital region traffic is gone continuously and continues. Accordingly, Kyonggi Province suggested rapid-transit railway achievement that can connect Seoul Gangnam in 20 minutes with Dongtan new city recently. MLTM(Ministry of Land Transport and Maritime Affaris) announced "Capital region railway network improvement plan research services (2007.12)" result that Gangnam High-speed railway route (Suse $\sim$ Dongtan $\sim$ Pyeongtaek) construction for offer High-speed railway service to capital region and Kyonggi southern part area inhabitantses and need to line capacity tribe solution by Seoul-Busan high-speed railway second-stage and Honam high speed railroad completion. Is judged that need examination about wide area rapid-transit railway combined application operation that take advantage of rail track reserve capacity of High-speed railway for utilization efficiency elevation of country and efficient investment of national finance according as High-speed railway and Gangnam rapid-transit railway route that is suggested in Kyonggi Province are overlaped. Therefore, in this research, I wish to quote investment efficiency plan of railroad business by that different kind's train is run in uniformity track by presenting combined application operation plan and working expenses curtailment effect etc. that is optimized through analysis of roadbed and E & M technology condition, intermediate station plan, train operation planning etc. in case of wide area rapid-transit railway and high-speed railway run combined application.

• Korean Journal of Plant Resources
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• v.20 no.5
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• pp.398-403
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• 2007

This study was carried out to enhance germination of the seed by different immersion temperatures(15, 20, 25, 30 and $35^{\circ}C$) and times(1, 6, 12, 18, 24, 36 and 48 hours) in Cryptomeria japonica that is a major plantation species in the southern Korea. Optimum germination temperature was between $20^{\circ}C$ and $25^{\circ}C$, and the lowest germination was observed at $35^{\circ}C$ Moisture absorption increased with increasing immersion time as a whole and was high at $30^{\circ}C$ and $35^{\circ}C$. Initial moisture absorption rate was highest at $30^{\circ}C$ whereas was lowest at $15^{\circ}C$ Moisture absorption rate constant was also high at $30^{\circ}C$ and $35^{\circ}C$, however, it was relatively low at $15^{\circ}C$ and $20^{\circ}C$ Germination was the highest when the seeds were immersed for 48 hours at $30^{\circ}C$. In mean germination time(MGT) the seeds immersed for 48 hours at $30^{\circ}C$ did not differ from non-treatment, while the others showed higher values than non-treatment. Consequently, germination could be enhanced and MGT was kept by optimum immersion temperature and time.

• Journal of Fisheries and Marine Sciences Education
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• v.24 no.4
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• pp.507-515
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• 2012

Jungmun beach was confirmed only one beach as a nesting place of seaturtles in Jeju of South Korea. We investigated the environment conditions for nesting of seaturtles (sites 1, 2) to target as the spawning grounds of accidental nesting place. Sand temperatures of beaches at 5 cm above and 10, 30 and 50 cm below the surface of beach were measured at intervals of approximately 10 days during June to December. These data indicated that the optimum (over $25^{\circ}C$) sand temperature for spawning and hatching of seaturtles in the sites 1 and 2 from June 23 to September 29, 2008 and from June 23 to October 17, 2008, respectively. Also, maintained the optimum coastal water temperature (above $20^{\circ}C$) for seaturtles maintained from June 23 to November 17, 2008. Therefore, Jungmun beach could be the possible spawning grounds of accidental nesting place, where the landed seaturtles and hatched young seaturtles could be survived successfully.

• Korean Journal of Soil Science and Fertilizer
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• v.42 no.5
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• pp.379-384
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• 2009

This study was carried out to understand the national and regional distribution of the biomass resources produced in Korea annually via establishing database (DB) and distribution maps of biomass resources data including as livestock manures, food wastes and agricultural by-product. The information of the annual production of each biomass resources was obtained from Ministry for Food, Agriculture, Forestry and Fisheries (MIFAFF), Ministry of Environment (MOE) and National Statistical Office (NSO). Based on biomass resources data, we established database architecture table about livestock manures and food wastes. The distribution maps for the total amount of manures produced from each livestock animal were built up in both national and regional scales and used for analysis of the space-based and time-based distribution of the manure resources. Distribution maps for food wastes and agricultural by-product were also produced, respectively. It was shown that the analysis through resource mapping can be used to identify the sources of collectable biomass feasibly determining suitable region for establishment of a biomass-energy production. The biomass distribution maps graphically provide the information regarding biomass resources to policy-makers, farmers, general users and it was expected to be utilized for policy-making of environmental-friendly agriculture and bio-energy.

• Animal Systematics, Evolution and Diversity
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• no.nspc5
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• pp.29-46
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• 2005

As a commemorative joint survey for the 20th anniversary of the Korean Society of Systematic Zoology, molluscan fauna of Jindo Island was investigated from the materials collected from 3 localities of Jindo Island from 29th to 30th of June, 2004. A total of 77 species of 37 families were identified. Among them, 26 species of 18 families are reported for the first time in this area, including Onchidella kurodai (Taki, 1935) that is new to Korean fauna. For O. kurodai, external morphologies were described in detail with illustrations. Combining the present data with those of the previous works revealed that a total of 115 species from 43 families have been recorded in Jindo Island and its adjacent areas thus far. From a biogeographic point of view, some gastropod species (Bittium craticulatum, Mocroschisma dilatatum, Cantharidus japonicus, C. callichroa, Homalopoma sangarense, and Crepidula onyx) encountered from Jindo Island were the species previously recorded in the southern and/or eastern offshores of Korean peninsula, including Jeju Island (Choe, 1992). Along with the fact that Jindo Island contains a large number of molluscan species ranging over the Yellow Sea coast, this finding is another line of evidence supporting the Kim and Kwon (1983)'s idea that this area is an overtopping zone of marine organisms which dwell in both the Yellow sea and southern part of Korean sea waters. No comprehensive faunistic survey was not made in the present study. We expect that further supplementary study would generate more biogeographic and faunistic knowledges than what we understand through the present study.

• Journal of the Korean Society of Marine Environment & Safety
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• v.27 no.6
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• pp.721-730
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• 2021

Maritime air pollutants around port cities have gained a great deal of attention due to their direct impacts on regional air quality. This study aims to determine the geographical properties of sea/land breezes in different areas to discover overall ranges of maritime emission dispersion. The HOTMAC-RAPTAD modeling program was used to simulate regional-scale air dispersion considering non-linear and unsteady states during the general summer period for the target areas of the Yellow Sea (Incheon Port and Pyeongtaek·Dangjin Ports), archipelago region (Mokpo Port), South and East Sea (Busan and Masan Ports) and East Sea with mountainous area (Donghae·Mukho Ports). The resulting dispersion lengths of vessel emissions into the onshore regions around the target ports shed light on portal air quality management, because vessel emissions from the Incheon, Mokpo, Busan, and Donghae·Mukho ports were transported 27-31km (Western Seoul), 21-24km (Southern Muan), 20-26km (Gimhae and Yangsan), and 22-25km (Taebeak Mountains), respectively. Therefore, the results of this study provide useful data for regional air quality management and marine air pollution mitigation to improve the sustainability of port cities.