• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.9
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• pp.57-67
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• 2016

This study is designed to investigate the differences of ferritin and hemoglobin levels according to the vitamin D state in 23577 Korean adult subjects by using data from the Korea National Health and Nutrition Examination Survey IV, V. Ferritin and hemoglobin levels are analyzed based on the quintile of vitamin D levels by a generalized linear model. The results of analysis showed that there was a relationship between vitamin D state and hemoglobin levels in females in the reproductive status group (p<0.001). In case of ferritin, there was a relationship with vitamin D state in females in reproductive status group (p<0.001) and males under 65 years old group (p<0.05). Within the male group, high ferritin correlated with low vitamin D state; but in the female group, high ferritin correlated with high vitamin D state. Therefore, it is possible for the ferritin level to be affected by vitamin D state in females in reproductive status group and males under 65 years old group.

• Journal of the Mineralogical Society of Korea
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• v.32 no.1
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• pp.15-39
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• 2019

An ultramafic complex occurs as an isolated lenticular body in the Andong area. The Andong ultramafic complex comprises ultramafic and mafic rocks, but mainly peridotites. The complex extends for several kilometer to ENE direction, adjacent to the Andong fault line. This study is for petrochemistry of the peridotites within the ultramafic complex and characteristics of asbestos occurrences. The peridotites are igneous origin, ranging from lherzolite to wehrlites and are characterized by high Fo olivine ($Fo_{0.85-0.87}$), Mg clinopyroxene ($Mg_{87.5-93.5}$), and tremolitic to tschermakitic hornblende. Geochemically, these rocks show high magnesium number (mainly Mg = 85.3-87.38) and transitional element and low alkali element contents. The peridotites host asbestos, including chrysotile, tremolite and actinolite asbestos, but dominated by amphibole asbestos. The amphibole asbestos are found along small fault face, and cleavage and fracture showing several cm to ten cm in width as slip and oblique fibers, while the chryostiles occur at cleavage and vein showing several mm-cm in width as cross and slip fibers. They are confirmed by PLM, XRD and SEM results. Overall characteristics of peridotites from the Andong ultramafic complex and occurrences of the asbestos are similar to those of worldwide orogenic related Alpine type ultramafic rocks and serpentinized ultramafic bodies in Chungnam, Korea, respectively.

• Journal of Korea Port Economic Association
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• v.38 no.3
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• pp.29-51
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• 2022

The International Maritime Organization (IMO) designated the Emission Control Area (ECA) in Northern Europe to reduce the NOx and SOx emissions from ships in the coastal areas. This study used Network slack-based measure (SBM) Data Envelopment Model (DEM) and Bootstrop Truncated Regression (BTR) model to analyze the ECA's impact on ferry companies' financial performances based on the financial data from eight ferry carriers in Northern Europe, the Mediterranean and North America from 2004 to 2017. To alleviate the problem of arbitrary variable selection in DEA, the variable selection criteria proposed by Dyson et al. (2001) were applied; the size of the company was considered through the Network SBM DEA model; and the company's profit-generating process was divided into stages to measure financial performance in more detail. In addition, the BTR model was applied to derive results that minimize the bias of the data. The study found that ECA regulations did not always negatively affect the shipping companies' financial performance. Rather, a steady increase in efficiency was observed for Northern European ferry companies which were subject to the strongest regulations. For North American ferry companies, government subsidies were found to have a significant impact on efficiency, and relatively small impact on efficiency due to the ECA and oil prices. For the Mediterranean ferry companies, efficiency values have decreased since the implementation of ECA regulation despite the lowest level of regulation in the region.

• Korean Journal of Mineralogy and Petrology
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• v.35 no.3
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• pp.273-281
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• 2022

Mantle heterogeneity is closely related to the distribution and circulation of volatile components in the Earth's interior, and the behavior of volatiles in the mantle strongly influences the rheological properties of silicate rocks. In mantle xenoliths, these physicochemical properties of the upper mantle can be recorded in the form of microstructures and fluid inclusions. In this paper, I summarized and reviewed the results of previous studies related to the characteristics of microstructures and fluid inclusions from peridotite xenoliths beneath the Rio Grande Rift (RGR) in order to understand the evolution and heterogeneity of upper mantle. In the RGR, the mantle peridotites are mainly reported in the rift axis (EB: Elephant Butte, KB: Kilbourne Hole) and rift flank (AD: Adam's Diggings) regions. In the case of the former (EB and KB peridotites), the type-A lattice preferred orientation (LPO), formed under low-stress and low-water content, was reported. In the case of the latter (AD peridotites), the type-C LPO, formed under low-stress and high-water content, was reported. In particular, in the case of AD peridotites, at least two fluid infiltration events, such as early (type-1: CO₂-N₂) and late (type-2: CO₂-H₂O), have been recorded in orthopyroxene. The upper mantle heterogeneity recorded by these microstructures and fluid inclusions is considered to be due to the interaction between the North American plate and the Farallon plate.

• Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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• 2001.10a
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• pp.55-61
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• 2001

Recently, the trade volume between Korea, China, and Europe is increasing gradually with various transport routes such as sea, railway. and linking of them. In this study, economic efficiency of existing transport routes are estimated and trainferry type shipping between Mokpo and Lianyungang is proposed as a efficient transport route considering the trade volume between Korea and China.

• The Korean Journal of Financial Management
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• v.17 no.2
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• pp.257-276
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• 2000

본 연구는 실질금리페리티(RIP, Real Interest Rates Parity)가 존재하기 위한 4가지의 균형조건을 설명하였으며 이 조건들을 한국과 일본의 시계열에 적용하였다. 4가지의 균형조건은 4개의 공적분백터를 의미하며 요한센의 다변량 공적분 방법을 이용하여 추정한 결과 2개의 공적분백터가 존재하였다. 따라서 한 일간의 RIP균형조건은 기각되었으며, 기대구매력평가설(EAPPP)과 노출된 이자율평가설(UIP)이 한국과 일본간에 성립하지 않는 것으로 나타났다.

• Journal of the korean veterinary medical association
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• v.53 no.2
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• pp.93-96
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• 2017

수의치과 임상에서 대부분 발치기구로는 발치포셉과 엘리베이터만 가지고 발치를 하였습니다. 발치포셉과 엘리베이터의 종류를 늘리는 것보다 럭세이터, 루트익스트렉팅포셉, 루트피커, 페리오톰, canine luxator를 구비해서 각각의 용도에 맞추어 기구를 사용해야한다는 것이 키포인트입니다. 아울러 치주인대의 2/3를 럭세이터, 페리오돔, canine luxator로 제거하고${\ldots}$ 엘리베이터를 이용해서 견인하고, 치아를 살짝 집어서 빼주는 것은 발치포셉의 역할임을 잊지말고, 루트가 부러졌을때는 루트피커와 루트익스트렉팅포셉을 이용하는것이 팁입니다.

• Monthly Korean Chicken
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• v.31 no.25 s.91
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• pp.30-30
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• 2003

• 월간 기계설비
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• s.120
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• pp.108-120
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• 2000

• 아름다운작은공간 미소공
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• v.24
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• pp.26-29
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• 2002