• Korean Journal of Mineralogy and Petrology
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• v.35 no.3
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• pp.183-197
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• 2022

Geochemical data, including Sr-Nd-Pb-Mg-Zn isotopes, reported on the late Cenozoic intraplate basaltic rocks in the Korean Peninsula (Mt. Baekdu, Jeongok, Baengnyeong Island, Pyeongtaek, Asan, Ganseong, Ulleung Island, Dok Island, and Jeju Island) are summarized to constrain their mantle source lithologies, and the nature of mantle end-members required. In the Sr-Nd isotope correlation diagram, Jeju basalts plot in the field of EM2-type oceanic island basalts (OIB), while the other basalts fall in the EM1-type OIB field. In Pb-Pb isotope space, Jeju basalts show a mixing array between Indian MORB and EM2 component, whereas the other basalts display an array with EM1 component. The Korean basalts were derived from a hybrid source of garnet lherzolite and recycled stagnant slab materials (eclogite/pyroxenite, pelagic sediments, carbonates) in the mantle transition zone. The EM1 component could be ancient (~2.0 Ga) K-hollandite-bearing pelagic sediments that were isolated for a long period in the mantle transition zone due to their neutral buoyancy. The EM2 component might have been relatively young (probably Pacific slab) and recently recycled clay-rich pelagic sediments. Eclogite and carbonates are unlikely to account for the EM components, but they are common in the mantle source of the Korean basalts.

• Proceedings of the Korean Aquaculture Society Conference
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• 2003.10a
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• pp.117-117
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• 2003

다시마(Laminaria japonica) 생태육종 연구의 일환으로 완도산과 백령도산 품종의 재배시험을 전남 고흥군 명천어장과 계도어장에서 2001년부터 2002년까지 실시하였다. 시험기간 중 어장의 수온, 염분농도, 유속, 용존산소농도는 구간별로 유의차가 없었으며 수온은 1월부터 7월까지 점차 상승하였고, 염분농도는 5월까지 상승하다가 6월과 7월에 낮아졌다. 유속은 저층에서보다 표층에서 빨랐고, 용존산소농도는 1월부터 7월까지 점차적으로 낮아졌다. 어장의 영양염 변화는 구간별로 1월부터 7월까지 유의차가 없었으며 암모니아염이 5월에 다소 증가하였다. 일반적으로 전장과 엽폭은 4월까지 증가하다가 끝녹음으로 인하여 4월이후에는 다소 감소하였으나, 엽두께, 전중량, 비대도는 7월까지 계속적으로 증가하였다. 형질간의 상관관계는 모두 1%와 5% 수준에서 유의차가 있었다. 각형질에 있어서 품종과 환경간에 월별로 질적교호작용과 양적교호작용중 어느 한 쪽이 나타났다. 품종시험에 의한 유전력은 엽폭에서 가장 높았고, 엽두께에서 가장 낮았다. 표현형상관, 유전상관, 환경상관계수는 형질간에 대부분 높은 값을 보였으나 엽두께와 전중량간의 값이 일반적으로 낮았다. 부모와 자식간의 회귀에 의한 유전력은 계도어장의 엽두께에서 가장 높았으나 일반적으로 전중량에서 높았고, 육종가와 유전상관은 전중량에서 가장 높았다. 각 형질의 상대적 경제 가치를 고려한 선발 총점은 명천어장에서의 완도산 품종에서 가장 높았다.

• Korean Journal of Plant Taxonomy
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• v.38 no.1
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• pp.63-68
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• 2008

We report a taxon of the unrecorded genus Knorringia (Polygonaceae) from Baengryeongdo, Ongin-gun, Incheon-si in the Korean peninsula. This taxon is K. sibirica (Laxm.) Tzvelev subsp. sibirica., has been known from Siberia, Mongolia and China. The new Korean name, 'Si-be-ri-a-yeo-kkwi', was given considering the species epithet and the type locality, Siberia. Description, illustration and photograph showing habitat were given.

• Journal of Environmental Science International
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• v.31 no.6
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• pp.525-533
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• 2022

Baengnyeongdo, located within the Asian dust stream, is an ideal place to analyze Asian dust moving into the West Sea due to its low emission of artificial pollutants. Baengnyeongdo is being used to analyze the vertical distribution of dust from the lower atmosphere to the upper layer through remote observation. This study compared the ground concentration of dust between Baengnyeongdo and the metropolitan area, estimated the lag time of transport of Asian dust from Baengnyeongdo to the metropolitan area, and examined the homogeneity of upper winds using the rawinsonde method. The results showed that the cross correlation coefficient was higher and the lag time was shorter for each observation station when the distance from Baengnyeongdo was shorter. The upper wind at Baengnyeongdo is dominated by the west/northwest wind. It is the basis for the correlation of dust concentration between Baengnyeongdo and the metropolitan area located to the east. In the future, upper wind data and Asian dust concentration data over the West Sea and Baengnyeongdo are expected to contribute to research related to the movement and prediction of Asian dust and preparation for Asian dust in the metropolitan area.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.51 no.spc1
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• pp.220-223
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• 2006

Mugwort, Artemisia princeps Pampanini, has been used as natural medicine traditionally in the far east countries including Korea. This study was performed with the object of provoding basic data an leaf quality improvement in mugwort. The 210 mugwort were collected in 48 locations from 2004 to 2006, leaves of 210 genotypes collected were analyzed for eupatilin, jaceosidin and sesamin content. The eupatilin content was averaged to 43.8mg (100 g leaves) and ranged from 0 to 228.0 mg. The average jaceosidin and sesamin contents were 12.8 mg and 3.58 mg and the ranges of those were 0 to 73.8 mg and 0 to 6.56 mg, respectively. The eupatilin content of mugwort harvested in the western region was higher compared with those harvested in the resemble altitude of the southern and eastern of Korea.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.39 no.3
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• pp.174-180
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• 2003

This study investigated the size selectivity of the round traps for greenling (Hexagrammos otakii) in the western sea of Korea. The selection curve for the greenling from the experiments on Oct. 2000 and Ar. 2001 was fitted by Kitahara's method to a polynomial equation and two parameter logistic selection curve. The selectio curve of the latter was more reasonable than that of the former. The equation of selectivity curve obtained using a logistic function with least square method was , s(R)=1/1+exp(-1.1169R+6.4565), where R=1/m, and 1 and m are total length and mesh size, respectively. The size selectivity curve showed that the current regulated mesh size(35mm) in case of the round trap was close to the L50 (37.0mm) of the selection curve for the biological minimum length (21.4cm) of the greenling.

• Korean journal of applied entomology
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• v.45 no.3 s.144
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• pp.261-268
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• 2006

Ten species of subtropical macro-moths including Squamura sp. of Metarbelidae, were discovered at Is. Daecheong in the West Sea. The other nine species are Zeuzera sp., Setora baibarana (Matsumura), Toccolosida rubriceps Walker, Hyposidra talaca (Walker), Celerena signata Warren, Creatonotos transiens (Walker), Vitessa suradeva Moore, Callambulyx rubricosa (Walker), and Dodusa nobilis Walker, and they are mostly distributed in the subtropical area from the southern part of China to Borneo or Java.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.25 no.4
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• pp.203-208
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• 2014

Objectives : Art and culture education might play a good role in children's emotions ; however, few studies to verify this have been conducted. The objective of this study was to examine the effect of an art and culture education program on behavior and social skills in children aged 7-10 years. Methods : Fifteen children (mean age $7.31{\pm}0.95$ years) were recruited from a community center and participated in an art and culture education program. The participants received a once a week program for 17 sessions, and we compared scores on the Child Behavior Checklist (CBCL) and Social Skills Improvement System-Rating Scales (SSIS-RS) before and after intervention. Results : The participants' subscale scores of CBCL-aggressive behavior, social immaturity, internalizing behavior, externalizing behavior, total behavior problems and social skill scores on the SSIS-RS showed improvement (p<.05) after 15-weeks of the art and culture education program. Conclusion : These results suggest a positive effect of an art and culture education program on the reduction of externalizing and internalizing behaviors and improvement of social skills in children. Further prospective, controlled studies in large samples are needed in order to confirm our findings.

• Korean Journal of Plant Taxonomy
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• v.38 no.3
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• pp.315-332
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• 2008

To elucidate the distribution of broad-leaved evergreen plants of the central part of the Yellow Sea, we surveyed 136 islands of Incheon from May 2006 to March 2008. In the present survey, twelve broad-leaved evergreen species were found on 77 islands, which included 28 inhabited and 49 uninhabited islands. Among them, the most popular plants were the following: Euonymus japonicus Thunb., Elaeagnus macrophylla Thunb., Camellia japonica L., and Cyrtomium falcatum (L.f.) C. Presl. These plants were found growing on Baengnyeong Island, the northmost island among those surveyed, near $N 37^{\circ}60^{\prime}$. On the other hand the following four species are found up to Deokjeok-myeon only, near N $N 37^{\circ}10^{\prime}$: Hedera rhombea (Miq.) Bean,, Quercus acuta Thunb. ex Murray for. acuta, Neolitsea sericea (Blume) Koidz., and Trachelospermum asiaticum (Siebold & Zucc.) Nakai. However, these plants are usually found growing in the southern or southwestern coastal region of the Korean Peninsula. Thus the distribution of the broad-leaved evergreen plants growing on these high latitude islands might be influenced by a warm current of the Yellow Sea. The distribution of broad-leaved evergreen plants on each island is described.

• Atmosphere
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• v.20 no.4
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• pp.467-482
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• 2010

In this study, characteristics of various stability indexes (SI) and environmental parameters (EP) for the lightning are analysed by using 5 upper air observatories (Osan, Gwangju, Jeju, Pohang, and Baengnyeongdo) for the years 2002-2006 over South Korea. The analysed SI and EP are the lifted index, K-index, Showalter stability index, total precipitable water, mixing ratio, wind shear and temperature of lifting condensation level. The lightning data occurred on the range of -2 hr~+1 hr and within 100 km based on the launch time of rawinsonde and observing location are selected. In general, summer averaged temperature and mixing ratio of lower troposphere for the lightning cases are higher about 1 K and $1{\sim}2gkg^{-1}$ than no lightning cases, respectively. The Box-Whisker plot shows that the range of various SI and EP values for lightning and no lightning cases are well separated but overlapping of SI and EP values between lightning and no lightning are not a little. The optimized threshold values for the detection of lightning are determined objectively based on the highest Heidke skill socre (HSS), which is the most favorable validation parameter for the rare event, such as lightning, by using the simulation of SI and EP threshold values. Although the HSS is not high (0.15~0.30) and the number and values of selected SI and EP are dependent on geographic location, the new threshold values can be used as a supplementary tool for the detection or forecast of lightning over South Korea.