• 대한지리학회지
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• 제49권1호
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• pp.32-44
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• 2014

본 연구에서는 중부지방의 1월 최저기온 분포 특성을 파악하고 철원의 극한 최저기온의 원인을 규명하고자 하였다. 이를 위해 중부지방 25개 관측소의 1991~2010년 1월 기온 분포 특성과 철원 기온과 춘천, 홍천, 봉화, 대관령, 원주, 제천 등 중부내륙 지역의 기온 차이를 기압배치형에 따라 분석하였다. 일평균기온과 평균 일최저기온은 철원과 해발고도가 높은 지역에서 낮게 나타나지만, $-15^{\circ}C$ 이하 일수와 같은 극한기온의 출현빈도는 철원에서 두드러졌다. 시베리아 고기압이 확장하거나 우리나라 북쪽에 이동성 고기압이 위치할 때 철원 기온이 비교지점에 비해 상대적으로 더 낮다. 이동성 고기압의 영향을 받을 때는 철원과 비교지점 간 기온 차이가 적거나, 봉화, 제천과 같은 분지의 기온이 더 낮다.

• 천문학회보
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• 제45권1호
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• pp.46.1-46.1
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• 2020

DEEP-South (DEep Ecliptic Patrol of the Southern Sky) team will start the 2nd phase of KMTNet observation in Oct 2020. The DEEP-South observation mainly consists of three survey modes: (1) Activity survey (AS) that aims at finding active phenomena of small Solar System bodies. (2) Light curve survey (LS) targets to discover and characterize light variations of asteroids. And (3) Deep drilling survey (DS) focuses on the objects beyond the orbit of Jupiter (Centaurus and trans-Neptunian objects) as well as near Earth asteroids. For asteroid family (AF) studies and target of opportunity (TO) observations for urgent photometric follow-up, targeted mode will also be used. DEEP-South team is awarded 7.0% of the telescope time at each site every year from Oct 2020 to Sep 2023 in the 2nd phase of KMTNet operation which corresponds to about 75 full nights a year for the network. In this presentation, we will introduce our survey strategy and observation plan.

• Journal of Korea Trade
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• 제25권2호
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• pp.95-110
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• 2021

Purpose - This paper intends to conduct theoretical analysis and empirical test on the action mechanism of South Korea-China trade and South Korea's FDI to China on green total factor productivity, so as to provide a new perspective and ideas for the improvement of China's green total factor productivity and promote the high-quality development of China's economy Design/methodology - This paper uses the data of 30 provinces, autonomous regions and municipalities in China from 2004 to 2017 as the research sample, adopts the GML index method of SBM Directional Distance Function to measure GTFP, and analyzes the influence of South Korea-China trade and FDI from South Korea on China's GTFP. Findings - Trade is conducive to promoting technological progress, which has a significant promotion effect on China's green total factor productivity. While FDI has a significant inhibitory effect on China's green total factor productivity, which verifies the "pollution haven" hypothesis. In addition, such influence has certain regional overall heterogeneity. Trade has a more significant promoting effect on GTFP in eastern coastal areas, while FDI has a more significant inhibitory effect on GTFP in central and western inland areas. The interaction between trade and FDI is conducive to the improvement of green total factor productivity, indicating that the benign mechanism of trade and FDI has been formed. Urbanization, industrial structure, human resource level and investment in science and technology are all conducive to the improvement of GTFP. Originality/value - Through theoretical analysis and empirical test on the action mechanism of South Korea-China trade and South Korea's FDI on green total factor productivity, this paper provides a solid theoretical foundation for the further development of China-South Korea economic and trade cooperation in the future.

• Journal of Plant Biology
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• 제33권3호
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• pp.159-168
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• 1990

The occurrence and distribution of cellular slime molds in major deciduous forests of South Korea were investigated. Ten species were isolated from the soils collected at ten sampling areas and cultured in hay infusion agar with E. coli. These include: Dictyostelium minutum Raper, Dictyostelium mucoroides Brefeld, Dictyostelium lacteum Van Tiegham, Dictyostelium polycephalum Raper, Dictyostelium fasciculutum Traub, Hohl and Cavender, Dictyostelium sp. Polysphondylium pallidum Olive, Polyshpondylium violaceum Brefeld, Copromyxellar sp. and Guttulinopsis vulgaris Olives. Among these species, Dictyostelium sp. and Copromyxellar sp. could not be identified. D. minutum and D. mucoroides occurred the most frequently in almost all the deciduous forests investigated in this study. Dictyostelium sp., D. fasciculutum and Copromyxella sp. occurred only in the north of the central region, but D. lacteum and D. polycephalum were found only in the south of that region. This indicates that distribution of these species may be affected by climate. The number of isolates per sampling site ranged from 2 to 6, averaging 4.3.

• 한국환경보건학회지
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• 제49권3호
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• pp.134-148
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• 2023

Background: The conducting of health effect surveys (HESs) in environmentally contaminated vulnerable areas (ECVAs) by the central and local governments has been increasing apace with the increase in demand for HESs since the Environmental Health Act was enacted in South Korea in 2008. Objectives: This study aimed to review the HESs of residents in ECVAs conducted in South Korea. Methods: An analysis was performed on 125 reports obtained from the Environment Digital Library, PRISM, and local government websites after selecting from 803 projects obtained as ECVAs from the Korea ON-Line E-Procurement System (1997~2021), National Institute Environment Research (2000~2021), and Korea Environmental Industry and Technology Institute (2009~2021). The reports were classified by background (residents' demand, HES, and more), research design (cross-sectional study, cohort, ecological study, and panel), pollution source (abandoned metal mine (AMM), industrial complex (IC), and more), and assessment method of exposure and health effects. The survey area was converted into administrative district codes for geographical mapping. Results: There were 37, 34, 18, and 10 cases associated with AMM, IC, waste incinerators, and coal-fired power plants, respectively. Most of the studies conducted were cross-sectional studies and ecological studies. The proportion of epidemiological investigations by residents' demand showed an increase from 0.0% to 8.9% for the central government while decreasing from 16.7% to 14.3% for local governments after 2008 compared to before 2008. HESs increased at both the central and local government levels since 2014. For the evaluation method, 365 environmental hazards, 319 health outcomes, and 302 biological markers were investigated, with the most commonly investigated items being metals, cancer, and blood metals. Conclusions: HESs of residents in ECVAs in South Korea have been continuously developed both quantitatively and qualitatively. Future improvements are expected, and systematic review and classification of the HESs is warranted.

• 지구물리
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• 제5권3호
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• pp.211-218
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• 2002

$Q_{Lg}^{-1}$를 구하는 방법 중에서 Chun et al. (1987)이 고안한 Reversed two station method (RSTM)는 진앙거리 90 km 이상의 Lg파에 대하여 시행되고 있다. 진앙거리 95 km 에서 381 km에 이르는 중부지역 지진자료에 대하여 RSTM에 의한 $Q_{Lg}^{-1}$를 구한 결과, 비슷한 진앙거리에 대한 동일한 방법으로부터 얻어진 남한 남동부지역의 값과 비슷한 높은 값이 도출되었다. 남한 남동부 및 중부지방의 높은 $Q_{Lg}^{-1}$는 실제와 다른 것으로, RSTM이 본 연구 진앙거리 구간에서는 감쇠율이 표면파 감쇠율 0.5 보다 크기 때문인 것으로 해석된다.

• 한국항만경제학회지
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• 제36권4호
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• pp.107-120
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• 2020

본 연구는 한국과 중미 5개국 간의 FTA가 발효됨에 따라 시장점유율, 무역집중도, 무역특화도를 활용하여 국내 주요 수출산업의 경쟁력에 대해 분석하였다. 분석결과, 한국에서는 선박과 자동차 및 부품, 철강, 전자기기 등 공산품 위주로 수출을 하고 있으며, 커피, 동과 같은 원자재 및 농산물을 수입하고 있어 상호보완적 무역구조를 나타내고 있다. 무역특화도 분석에서는 한국은 선박, 자동차, 철강, 기계류등의 공산품 수출에 특화되어 있었으며, 동, 커피 등 1차산품에 수입 특화되어 있는 것으로 나타났다. 대(對)중미 주요 수출 품목인 선박, 철강, 기계류와 같은 제품들은 관세인하로 인해 경쟁력이 더욱 강화될 것으로 예상된다. 또한 코로나 19로 인해 향후 의약품 및 의료용품에 대한 수요도 증가할 수 있을 것으로 예상된다. 본 연구는 한-중미 FTA 발효에 따라 중미 시장에서 한국의 주요 수출산업의 경쟁력 분석을 통해 수출전략 수립에 시사점을 제시하고자 하였으며, 중미 시장을 교두보로 향후 남미 지역으로 진출에 기초자료로 활용할 수 있을 것이다.

• Proceedings of the National Institute of Ecology of the Republic of Korea
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• 제3권4호
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• pp.212-220
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• 2022

DNA markers have been studied and used intensively to identify plant species based on molecular approaches. The genus Medicago belongs to the family Fabaceae and contains 87 species distributed from the Mediterranean to central Asia. Five species of Medicago are known to be distributed in South Korea; however, their morphological characteristics alone cannot distinguish the species. In this study, we analyzed the phylogenetic relationships using collected five species of Medicago from South Korea and 44 taxa nucleotide information from NCBI. The constructed phylogenetic tree using gibberellin 3-oxidase 1 and tRNA^Lys (UUU) to maturase K gene sequences showed the monophyly of the genus Medicago, with five species each forming a single clade. These results suggest that there are five species of Medicago distributed in South Korea. In addition, we designed polymerase chain reaction primers for species-specific detection of Medicago by comparing the plastid sequences. The accuracy of the designed primer pairs was confirmed for each Medicago species. The findings of this study provide efficient and novel species identification methods for Medicago, which will assist in the identification of wild plants for the management of alien species and living modified organisms.

• 천문학회지
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• 제27권1호
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• pp.1-11
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• 1994

We have observed the emission of $HC_3N$ J=4-3, 5-4,10-9 and 12-11 transitions toward the Sgr B2 central region in an area of $150'\times150'$ with resolutions of 16'-48'. The intensities and central velocities of line profiles show significant variations with positions. In contrast to the intensities of the low J-level transitions which gradually increase from the central source toward the outside region, the $HC_3N$ emission of the high J-level transition become stronger toward 'the central radio continuum source MD5. Systematic change in the radial velocity of each line profile occurs along north-south direction. There are a few peaks in most line profiles, and these indicate that there are multiple velocity components along the line of sight. Distributions of excitation temperature and column density which were estimated from the excitation calculations show the existence of a small $(1\times2pc),\;hot\;(T_{ex}>50K)$ core which contains two temperature peaks at-15' east and north of MD5. The column density of $HC_3N\;is\;(1-3)\times10^{14}cm^{-2}$ Column density at distant position from MD5 is larger than that in the central region. We have deduced that this 'hot-core' has a mass of 105M 0, which is about an order of magnitude larger than those obtained by previous studies.

• 지구물리
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• 제3권3호
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• pp.201-212
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• 2000

1991년 12월 이후 약 3년 동안 남한 중서부지역에서 발생할 미소지진을 한국교원대 관측망을 통해 관측하고 그 자료를 분석하였다. 월 평균 약 2회의 지진이 발생하여 낮은 지진활동도를 나타내며, 시간적으로 발생빈도에 뚜렷한 변화를 나타내지 않고 있다. 지난 3년간의 관측자료에 근거한 빈도-규모 관계식에서의 b값은 1.15이다. 진앙은 주로 옥천대에 많이 분포하고 있으며, 특히 옥천대와 영남육괴의 경계부인 문경지역, 보은-속리산-영동지역, 군산-논산 지역에 상대적으로 많이 분포하는 경향을 보인다.