• Journal of the Mineralogical Society of Korea
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• v.25 no.3
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• pp.163-173
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• 2012

In this study, we determined the relative clay mineral composition of 51 surface sediments from SEYSM (Southeastern Yellow Sea Mud) (northern part 25, southern part 26) and 30 river sediments inflow to Yellow Sea using the semi-quantitative X-ray diffraction analyses. In addition to we analyzed illite characteristics of the same samples. The clay-mineral assemblage is composed of illite (61~75%), chlorite (14~24%), kaolinite (9~14%), and smectite (1~7%), in decreasing order. The average composition of each clay mineral is not different from northern part to southern part of SEYSM except a little higher kaolinite and lower smectite content in northern part. Smectite content generally has reverse relationship with illite content. Mineralogical characteristics of illite such as illite crystallinity index also is not different between two areas and show very narrow range (0.18~0.24 ${\Delta}^{\circ}2{\theta}$). Our results reveal that clay mineral composition and illite characteristics are nearly the same between northern and southern part of SEYSM. Characteristics of surface sediments in SEYSM is closer to Korean river sediments than Chinese Hanghe sediments, however it is necessary to investigate further study including Yangtze river sediments. This study conclude that most of surface sediments in SEYSM attribute to the supply of considerable amount of sediments from the nearby Korean rivers. The large sediment budget and high accumulation rate in the SEYSM can be explained by erosion and reworking of surface sediments in this area. Tidal and regional current system around SEYSM might contribute these erosional and depositional regimes.

• KOREAN POULTRY JOURNAL
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• s.4
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• pp.59-64
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• 1970

• KOREAN POULTRY JOURNAL
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• s.5
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• pp.83-85
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• 1970

• Clinical and Experimental Reproductive Medicine
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• v.16 no.1
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• pp.41-55
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• 1989

Lymphocyte chromosome preparations obtained by the micromethod (Arakaki and Sparkes, 1963) from 234 our patients (165 females and 69 males) were analysed by C-, NOR-and GC-bandings for chromosome heteromorphisms. The centromeric regions of chromosomes 1,9,16 and the long arm of the Y chromosomes were tested for C heteromorphism. Minor variations found in this study such as inv(9), prominant short arms and large satellites of acrocentrics were also examined by appropriate banding techniques. Of the 234 probands, a total of 125 different C-variants were detected, and the average frequency of the variants per individual was estimated to be 0.53. The observed variations were as follows : 99 qh variants, 5 pericentric inversions of chromosome 9, and 21 satellite and/or short arm variants.

• Journal of the Mineralogical Society of Korea
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• v.27 no.3
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• pp.107-114
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• 2014

In this study, we tried to determine the origin of fine-grained sediments in Southeastern Yellow Sea Mud patch (SEYSM) using principal component analysis coupled with semi-quantitative X-ray diffraction analysis for 4 major clay minerals. We used 51 marine surface sediments from SEYSM and 33 surface sediments of rivers flowing into the Yellow Sea. We made bioplot diagram using R program with principal component 1 and component 2 because the two components might contain about 98% of all data. The content of each clay mineral in the south and north regions of SEYSM are almost similar. In the biplot, SEYSM sediments distribute close to Korean rivers sediments than Huanghe and Changjiang sediments. Based on these results, we suggest that SEYSM is originated from the Korean rivers sediments. The higher accumulation rate in the SEYSM compared to the sediment discharge from neighboring Korean rivers can be explained by erosion and reworking of surface sediments in this area. The principal component analysis can be used for the provenance research of marine sediments around the Korean Peninsula.

• Journal of the Mineralogical Society of Korea
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• v.26 no.3
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• pp.189-196
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• 2013

In this study, we tried to define the origin of fine-grained sediments in Southwestern Cheju Island Mud (SWCIM) using principal component analysis. We used relative clay mineral compositions using 138 marine surface sediments, 4 Huanghe sediments and 3 Changjiang river sediments by the semi-quantitative X-ray diffraction analysis. We made bioplot diagram using R program with principal component 1 and component 2 because they might contain more than 90% of all data. Although the distribution pattern of each clay minerals in SWCIM is so intricate, smectite and kaolinite contents are high in the west region, but illite and chlorite contents are rich in the east region. In the biplot, the east region of SWCIM distribute around Changjiang river, whereas west region of SWCIM disperse around Huanghe. Our results might reveal that west region of SWCIM is mainly originated by Huanghe, but east region of SWCIM by Changjiang River.

• The Journal of the Petrological Society of Korea
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• v.24 no.1
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• pp.55-63
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• 2015

We investigated the zircon U-Pb ages of the metapelites from the Sungjeon-myeon Gangjin-gun, the southwestern Ogcheon belt, to provide geochronological constraints for the depositional age as well as the distribution of Late Paleozoic formation. Data from the detrital zircons are mostly concordant, yielding four major age groups: (1) Neoarchean (~2.5 Ga); (2) Paleoproterozoic (~1.86 Ga, Statherian); (3) Middle Devonian(~390 Ma); and (4) Late Paleozoic (~322 Ma, Serpukhobian). The youngest zircon age gives a weighted mean $^{206}Pb/^{238}U$ age of $322{\pm}4.8$ Ma (n=16, MSWD=4.9), indicating deposition age of Early Carboniferous(Serpukhobian) or after. Therefore, the metapelites is considered to be the lowest Formation of the late Paleozoic Pyeongan Supergroup correlated with the Manhang Formation of the Samcheock coal fields and the Oeumri Formation(the Middle to Late Carboniferous) of the Hwasun coal field.

• Korean Journal of Culture and Social Issue
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• v.10 no.2
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• pp.79-101
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• 2004

This study is performed to understand and resolve psychologically the issue of North Korea-South Korea's cultural heterogeneity which is treated importantly in unification debates. We collected data from 181 North Korea Defectors through survey, and found out that the North Korea Defectors perceived cultural heterogeneity so much especially at the early settlement stage. However, this fact itself didn't give a serious suggestion, What is significant was how much South Korean cultural orientation they had as a coping strategy. When they coped with South Korean cultural orientation, they showed high level of self-efficacy, and furthermore they demonstrated high level of psychological adaptation. By the way, this psychological adaptation level was not significantly correlated with positive index such as life satisfaction, but correlated with negative index such as depression. That is, low self-efficacy group showed high level of depression and 43% of them could be classified as a depression-symptom group. Thus, we can conclude that it is rather helpful for the North Korean Defectors to have South Korean cultural orientation for overcoming North Korea-South Korea's cultural heterogeneity, and coping strategy is more important than cultural heterogeneity itself.

• 대한예방의학회:학술대회논문집
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• 2001.10a
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• pp.298-299
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• 2001

• Proceedings of the Korean Fiber Society Conference
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• 2002.04a
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• pp.388-391
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• 2002

의류용 소재의 다양화와 소재의 복합화에 따라 최근 여러 가지의 합성섬유 관련소재가 선을 보이고 있다. 그 중 double covering two way 이질 복합사 제품은 high touch 및 fashion 용 차별용도의 최적소재를 도출하여 기존의 제품과는 차별화 할 수 있다는 점과, 기존 제품과는 그 물성이 전혀 다른 새로운 소재의 제품을 생산함에 따라 품질 고급화에 크게 기여할 수 있다는 점에서 그 중요성을 가지고 있다. (중략)