• Economic and Environmental Geology
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• v.43 no.1
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• pp.53-66
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• 2010

We report petrologic characteristics including $^{40}Ar-^{39}Ar$ absolute ages of the subsurface lavas recovered from borehole cores in two islets, Marado and Gapado, off the southwestern coast of Jeju in southernmost Korea and discuss on the volcanism in the region. The lavas in Gapado are apparently divided into one unit with bright colored, aphanitic texture and sheet jointed, and another unit with dark colored and massive. The outcrops often show differentially weathered pattern due to textural difference. While, the lavas in Marado have vesicular and glomerporphyric texture, even though each lava flow unit in Marado has slight unique texture with variation of vesicularity and phenocrysts. The chemical composition of rock core samples from Gapa borehole and Mara borehole shows that the lavas from Gapado and Marado are classified into basaltic trachyandesite($SiO_2$ 52.6-53.6 wt%, $Na_2O+K_2O$ 7.3-7.5 wt%) and tholeiitic andesite($SiO_2$ 51.7-52.8 wt%, $Na_2O+K_2O$ 3.6-4.1 wt%), respectively. The measured $^{40}Ar-^{39}Ar$ plateau ages range from $824{\pm}32\;Ka$(MSL -69 m) to $758{\pm}\;Ka$(MSL 19 m) for core samples of Gapa borehole and $259{\pm}168\;Ka$(MSL -26 m) for a core sample of Mara borehole, respectively. The absolute age of Gapado basaltic trachyandesite is well correlated with that of Sanbangsan trachyte(Won et al., 1986). Meanwhile, the age of a sample in Marado has $259{\pm}168\;Ka$(MSL -26 m) with poor plateau age formation and high error range. We report the data in caution but the rock composition and absolute age of Marado tholeiitic andesite are relatively correlated with those of lava units from Duksu and Sangmo-2 boreholes, indicating the volcanism during 260-150 Ka. On the basis of interpretation of occurrences of exposed and subsurface volcanic rocks of the study area, stratigraphic relationship with adjacent borehole cores and the bathymetry chart of surrounding area, it indicates that the lavas in Gapado were formed around 800 Ka during relatively early stage of volcanic activity in Jeju Island. Meanwhile, Marado may have originated around 260-150 Ka during relatively young stage of volcanism in Jeju Island. It is inferred that the volcanisms have originated in land and these islets were individual ancient volcanoes. The apparent topography has been re-shaped by tidal erosion due to transgression.

• The Journal of the Petrological Society of Korea
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• v.22 no.2
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• pp.83-115
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• 2013

Erroneous fission-track (FT) ages caused by an inappropriate calibration in the initial stage of FT dating were redefined by re-experiments and zeta calibration using duplicate samples. Revised FT zircon ages newly define the formation ages of Yucheon Group rhyolitic-dacitic tuffs as Late Cretaceous to Early Paleocene ($78{\pm}4$ Ma to $65{\pm}2$ Ma) and Gokgangdong rhyolitic tuff as Early Eocene ($52.1{\pm}2.3$ Ma). In case of the Early Miocene volcanics, FT zircon ages from a dacitic tuff of the upper Hyodongri Volcanics ($21.6{\pm}1.4$ Ma) and a dacitic lava of the uppermost Beomgokri Volcanics ($21.3{\pm}2.0$ Ma) define chronostratigraphies of the upper Beomgokri Group, respectively in the southern Eoil Basin and in the Waeup Basin. A FT zircon age ($19.8{\pm}1.6$ Ma) from the Geumori dacitic tuff defines the time of later dacitic eruption in the Janggi Basin. Based on FT zircon ages for dacitic rocks and previous age data (mostly K-Ar whole-rock, partly Ar-Ar) for basaltic-andesitic rocks, reference ages are recommended as guides for stratigraphic correlations of the Miocene volcanics and basements in SE Korea. The times of accumulation of basin-fill sediments are also deduced from ages of related volcanics. Recommended reference ages are well matched to the whole stratigraphic sequences despite complicated basin structures and a relative short time-span. The Beomgokri Group evidently predates the Janggi Group in the Eoil-Waeup basins, while it is placed at an overlapped time-level along with the earlier Janggi Group in the Janggi Basin. Therefore, the two groups cannot be uniformly defined in a sequential order. The Janggi Group of the Janggi Basin can be evidently subdivided by ca. 20 Ma-basis into two parts, i.e., the earlier (23-20 Ma) andesitic-dacitic and later (20-18 Ma) basaltic strata.

• The Journal of the Petrological Society of Korea
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• v.20 no.2
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• pp.99-114
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• 2011

Precambrian gneiss complex in the Pyeongchang-Wonju area, which lies west of the Paleozoic sedimentary basin of the Yeongwol-Taebaek area, is being considered as a part of the Gyeonggi massif, but its ages of formation and metamorphic events are not well defined yet. In this study, SHRIMP zircon U-Pb ages were determined from the gneiss complex in the area, We obtained the discrete ages of magmatic (ca. 1960 Ma) and metamorphic (ca. 1860 Ma) events through the interpretation of the SHRIMP data based on the internal structures of zircons. These are almost the same to the ages of main intrusion and metamorphism reported from the Precambrian basements of Gyeonggi, Yeongnam and Nangnim massifs of the Korean Peninsula, Ages of 3200~3300 Ma, 2900 Ma, 2660 Ma, 2430 Ma, 2260 Ma, and 2080~2070 Ma obtained from inherited cores of studied zircons are also very similar to the frequently reported ages from the basement rocks of the Gyeonggi and Yeongnam massifs, Lower intercept age of about 270 Ma calculated from the rim data seems to indicate that the study area suffered from a late Paleozoic metamorphism (Okcheon Orogeny), but we need more reasonable and sufficient data to confirm it. According to the results of this study, it is suggested that the Bangnim group unconformably overlying the gneiss complex was deposited after the Paleoproterozoic granitic magmatism (ca. 1960 Ma) and metamorphism (ca. 1860 Ma).

• Journal of Korean Library and Information Science Society
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• v.40 no.1
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• pp.23-45
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• 2009

An university form alliance with the organic relationships the community as a delivery room of human cultural in it's formation and development. The university library is to service knowledge and information resources of it to residents, and education R&D learning of a university constituent. This study research and analyse to the service status of the university library in home abroad and consider necessity and importance of the community solidarity of it. Also it brings up the plans to revigority the community solidarity and services of university libraries in the side of lifelong study, R&D support, knowledge and information service, the community contribution and so on.

• Korean journal of communication and information
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• v.43
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• pp.47-80
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• 2008

KACIS was established in 1988 for critical academic movement in communication area. For 20 years after establishment, KACIS has grown into major academic society. The purpose of this article is reflection on the history of KACIS for 20 years. For this, this article review three areas on KACIS. First, It examine how critical academic movement that was initiated in middle of 1980s was changed in gear with Korean Society's shift. Second, It turn around the activity of 'Korean study group for society and communication', the predecessor of KACIS, which operate during $1988{\sim}1998$. Third, it consider KACIS's activity after convert to association, during $1998{\sim}2008$. When look back to 20 years of KACIS, first of all, the biggest fruit is to extend critical communication in academic area. However, several controversies exist about KACIS's identity. Conclusively, this article emphasize, for further development, organizing organic academic conference about social pending issue, strengthening journal's identity, fostering future academic generation, vitalizing research divisions.

• Journal of the Korean Geographical Society
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• v.42 no.2 s.119
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• pp.165-176
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• 2007

Absolute age of the deposition of 1.3 km-thick Bunthang sequence within the Skardu intermontane basin of the Central Karakoram was determined using radioactive decay of cosmogonic $^{10}Be$ and $^{26}Al$ burial dating. The Bunthang sequence deposited around 2.65 Ma, which is the oldest glaciation in the region. The timing of deposition of the Bunthang sequence is consistent with the previous suggestion that the basin filling took place between Brunhess and Matuyama chrons. Four major sedimentary facies interfinger within the Bunthang sequence: glacial diamict, lacustrine, fluvial and lacustrine facies upward. This sedimentary distinctiveness and the lack of evidence on the faults for alternative pull-apart basin model around the Bunthang sequence, suggest that the depressional basin was formed by deep subglacial erosion during the exrtensive Bunthang Glacial Stage and subsequently the sediments underlain by basal diamict, was quickly deposited by preglacial and paraglacial processes. Temporary ponding of the Indus River due to tectonic uplift in the downstream or blockage by mass movements might make the basin filing more possible. The hypothesis that the single ice sheet developed on the Tibetan Plateau during the global last glacial cycle should be refuted by the existence of the older extensive Bunthang glacier Furthermore, the extensive glaciation during the early Quaternary (and thus progressive decrease in extent with time) suggests that there may have been significant uplift of the Pamir to the west and Himalaya to the south, which would have reduced the penetration of westerlies and Indian summer monsoon and hence moisture supply to the region.

• Proceedings of the Korean Society of Applied Pharmacology
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• 2001.04a
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• pp.115-126
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• 2001

1988년 Reaven이 인슐린저항성증후군(insulin resistance syndrome)의 개념을 처음 소개한 후 전세계적으로 관심이 증가하고 있다. 인슐린저항성증후군은 대사성증후군 (metabolic syndrome), X 증후군(syndrome X)이라고도 하며, 인슐린 저항성에 따른 고인슐린혈증, 내당능장애(impaired glucose tolerance)와 2형 당뇨병(인슐린 비의존형 당뇨병), 이상지질혈증(dyslipidemia), 고혈압 등 일련의 질환은 동일인에서 흔히 병발하고, 이들은 모두 죽상경화증(atherosclerosis)의 위험인자라는 관점에서 상호연관성을 갖는 질환군이라는 개념이다. 2형 당뇨병은 인슐린에 대한 말초조직의 저항성과 상대적으로 감소된 인슐린 분비능의 결과라고 할 수 있다. 또한 상당수의 2형 당뇨병은 비만, 특히 복부비만을 동반하고 있으며, 비만은 그 자체로 인슐린 저항성을 유발한다. 결국 인슐린 저항성이 장기간 개선되지 못하게 되면 2형 당뇨병이 유발되게 된다. 따라서 2형 당뇨병에 대한 최선의 치료는 혈당조절 뿐만 아니라 인슐린 저항성과 관련된 심혈관계 위험인자를 개선시키는 것을 목표로 해야 한다. 그 증거로 당뇨병 조절과 관련한 대규모 전향적 연구인 UKPDS(United Kingdom Prospective Diabetes Study)의 결과를 보면, 2형 당뇨병에서 설폰요소제(sulfonylurea)나 인슐린으로 10년동안 혈당조절을 했을 때 미세혈관 합병증은 의미있게 감소시켰으나 대혈관 합병증의 발생률은 의미있는 감소를 보이지 못하였다. 반면 대혈관 합병증이 미세혈관 합병증보다 사망에 기여하는 비율이 70배 이상이라는 사실은 당뇨병의 치료가 혈당조절에만 초점이 맞추어져서는 안 되며 심혈관계 위험인자를 개선시키는 치료가 동시에 진행되어야 한다는 점을 시사한다.시료에서 매우 드물게 관찰된다. 음극선발광(cathodoluminescence) 영상의 해석을 통해 저어콘 결정의 성장사를 유추하였으며, 이를 바탕으로 이온현미분석 점(spot)을 정하였다. U-Pb-Th 자료는 퍼스(Perth) 저어콘 스탠다드 (CZ3, 564 Ma, $^{206}$Pb/$^{238}$U=0.0914)를 사용하였다. 아래에 기술하는 연대는 모두 $^{206}$Pb/$^{238}$U 연대에 해당된다. 두 개의 화강암질 편마암 시료로부터 구한 U-Pb 저어콘 연대는 각각 812 $\pm$ 14 Ma(1006-8)와 822 $\pm$ 17 Ma(1006-9)로 분석오차 내에서 서로 일치한다. 이 결과는 춘천 및 전곡 지역의 석류석 각섬암에서 보고된 Sm-Nd 전암연대(852 $\pm$ 24 Ma 및 824 $\pm$ 143 Ma; Lee and Cho, 1995; Ree et al., 1996)와 잘 부합한다. 따라서 후기 원생대 기간 중 화성활동이 한반도에서 광범위하게 일어났음을 시사한다. 한편, 1006-9 시료에서는 예외적으로 한 개의 저어콘 입자 주변부(rim)에서 매우 얇은 과성장띠가 관찰되었으며, 두 개의 점 분석으로부터 구한 U-Pb 저어콘 연대는 약 235 Ma이다. 이 띠는 또한 변성기원의 저어콘에서 흔히 관찰되는 작은 W (<0.05) 비를 보인다. 1006-5 시료는 위 두 시료로부터 수 km 떨어진 지점에서 채집하였으나, 저어콘 연대는 상이한 기록을 보여준다. 즉 매우 작은 Th/U (<0.01) 값을 갖는 저어콘의 주변부에서 223 $\pm$ 5 Ma의 연대가 잘 정의되며, 이는 1006-9 시료에서 관찰된 결과와

• Journal of the Korea Convergence Society
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• v.12 no.5
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• pp.227-237
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• 2021

Considerable attention has been given to Comprehensive School Physical Activity Program(CSPAP) to promote children's health and physical activity(PA) in Sport Pedagogy. This study examined the structural characteristics and effects of CSPAP using literature review analysis to comprehensively overview CSPAP model, which emphasizes the necessity of promoting PA and establishing a healthy lifestyle. Based on the results of the study, CSPAP provide health-enhancing PA in conjunction with schools, communities, and family. CSPAP suggested the importance of PA promotion in sport pedagogy via the uptake of moderate-to-vigorous physical activity(MVPA) accrual in line with the goal of high-quality physical education.

• Journal of the Mineralogical Society of Korea
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• v.26 no.3
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• pp.161-174
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• 2013

The geology of the weondong deposit area consists mainly of Cambro-Ordovician and Carboniferous-Triassic formations, and intruded quartz porphyry and dyke. The skarn mineralized zone in the weondong deposit is the most prospective region for the useful W-mineral deposits. To determine the skarn-mineralization age, U-Pb SHRIMP and K-Ar age dating methods were employed. The U-Pb zircon ages of quartz porphyry intrusion (WD-A) and feldspar porphyry dyke (WD-B) are 79.37 Ma and 50.64 Ma. The K-Ar ages of coarse-grained crystalline phlogopite (WD-1), massive phlogopite (WDR-1), phlogopite coexisted with skarn minerals (WD-M), and vein type illite (WD-2) were determined as $49.1{\pm}1.1$ Ma, $49.2{\pm}1.2$ Ma, $49.9{\pm}3.6$ Ma, and $48.3{\pm}1.1$ Ma, respectively. And the ages of the high uranium zircon of hydrothermally altered quartz porphyry (WD-C) range from 59.7 to 38.7 Ma, which dependson zircon's textures affected by hydrothermal fluids. It is regarded as the effect of some hydrothermal events, which may precipitate and overgrow the high-U zircons, and happen the zircon's metamictization and dissolution-reprecipitation reactions. Based on the K-Ar age datings for the skarn minerals and field evidences, we suggest that the timing of W-skarn mineralization in weondong deposit may be about 50 Ma. However, for the accurate timing of skarn mineralization in this area, the additional researches about the sequence of superposition at the skarn minerals and geological relationship between skarn deposits and dyke should be needed in the future.

• 월간낙농육우
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• v.26 no.5 s.289
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• pp.104-107
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• 2006

한-미 FTA 대응활동/미국산쇠고기 수입재개 대응활동/ 농지법 개정활동/집유체계 개편관련 논의 동향/식목일 식재행사(우리목장푸르게캠페인) 개최/농업통상정책협의회 참석/축산현안 설명회참석/농업농촌종합대책 점검을 위한 농업인단체장 간담회 참석/남북농민대표자회의 참석/혼합분유 품목분류 세분화 추진/축산환경정책포럼 위원 추천/목장부지 수용관련 건의/축산분쟁 사례조사 결과 보고/황사발생기간 중 관리수칙 준수철저 요청/전남도지회 운영위원회 개최/전북도지회 운영위원회 개최/경남도지회 미국쌀 수입 반대 연대투쟁/2006년도 봄재배용 목초 및 사료작물 종자 정산 중 /2006년도 가을재배용 목초 및 사료작물 종자 도입 추진중/조사료 공급/송아지 지사제 공급/낙농물티슈 "골드링크"공급/배합사료업체 축우담당자 초청간담회 개최