• Journal of Arbitration Studies
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• v.21 no.2
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• pp.157-183
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• 2011

본 연구는 한국의 다국적 기업이 세계 여러 지역(유럽, 아프리카, 아시아, 아메리카)에서 글로벌 경제 활동과 사업을 범세계적으로 수행하고 있으며. 범세계적인 글로벌 사업수행에서 지역별 경제변화가 지역적으로 다양하면서, 복잡하게 전개되는 것에 대해서 글로벌기업이 지역별 특성에 적합하게 사업을 영위하면서 글로벌하게 현지시장 접근 방법을 어떠한 기준으로 우선 접근하는지에 대한 방법을 통계처리를 하였으며 향후 어떠한 방법을 수용하여 전략적 방법과 모델을 개발하여 자연스럽게 글로벌화 추이를 알아보고자 연구과제들을 실증 분석 하였음. 그리고 글로벌화 하는 TNC's 기업의 지식과 정보의 습득이 중요하며, 변화와 혁신을 통해서 자신의 분야에서는 세계적 선도 기업이 되고자 하는 TNC's 기업이라면 선진국 TNCs 기업보다는 더 적극적인 전략과 사업 모델을 모색해야 한다는 전제하에 실증모형을 설정하고 연구과제들을 정리하였음. 1. TNC's에 의하여 세계경제 활동에 중요한 변수들을 여러 가지 측면에서 검토하고 지리적요인과 경제적 요소들을 고려하여 기술과 자원의 아웃소싱의 글로벌화 방법을 고려하여 세계경제체제의 변화와 향상에 많은 투자내용들이 지리적인 여건과 글로벌화를 고려하여 투자가 진행되어지는가의 추이를 분석하였음. 2. TNC's의 역량에 따라 사업경영에서 현지국가의 경영관리와 산업의 변화에 까지 영향을 주었고 향후에도 글로벌화 경제의 발달과 향상에 협력하는 기업, 자국의 경제 발달과 향상에 협력하는 기업에까지 긍정적인 협조가 이루어지는 투자형태의 글로벌화 지수의 내용을 실증분석 하였음.

• Proceedings of the Korean Vacuum Society Conference
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• 2012.02a
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• pp.513-513
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• 2012

핵 융합로의 대면재질(Plasma Facing Material; PFM)은 고온의 플라즈마와 고 에너지의 이온들에 지속적으로 노출 된다. 특히 PFM은 흡착되는 기체 등에 의한 부식과 변형이 발생할 수 있다. 현재 핵 융합로 내부의 PFM으로 고려되고 있는 재질 중 하나인 고순도 탄소타일의 경우 고온의 수소동위원소 플라즈마에 직접적으로 노출되므로 이에 의한 탄소타일에 흡착되는 수소 등의 기체에 대한 정량적인 분석방법이 필요하다. 본 연구는 고순도 탄소타일 등과 같은 플라즈마 대면재료에 흡착되어 있는 물질의 정량적 분석이 가능한 TDA (Thermal Desorption Analyzer)의 개념 설계에 관한 것이다. TDA는 고온 가열($800^{\circ}C$ 이상) 및 시료 장착부 및 초고진공(~10-9 torr) 및 측정부의 두 부분으로 구성 하였다. TDA 설계시 고온 가열 및 시료 장착부는 시료 내부에 흡착되어 있는 기체의 효과적 탈착을 위한 가열 및 시료의 모양에 영향을 받지 않는 장착방법, 시료 장착부의 outgassing rate를 최소화 하는 재질 선정 등을 고려하였으며, 초고진공(~10-9 torr) 및 측정부는 초고진공 유지방법, 터보펌프 배기속도 실측을 위한 구조, 진공측정 ion 게이지, 잔류가스분석기(Residual Gas Analyzer)의 최적위치 설정 등을 고려하여 설계하였다. 개념 설계된 TDA에 대하여 발표하고자 한다.

• Journal of the Korean Geotechnical Society
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• v.35 no.2
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• pp.19-27
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• 2019

In this study, an analytical model is proposed to estimate the buckling responses of tapered piles. The governing differential equation of the soil-pile system considering the tapering and side friction of the pile and the soil nonhomogeneity is derived, which is numerically integrated by the Runge-Kutta method and then the eigenvalue of bucking load is determined by Regula-Falsi algorithm. For a cylindrical pile, the results obtained from this study are found to compare well with those reported in literature. Illustrative examples for buckling load and stress as well as buckled shape are provided to investigate the effects of dimensionless parameters related to the soil-pile system.

• Proceedings of the Korea Water Resources Association Conference
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• 2017.05a
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• pp.202-202
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• 2017

전 세계적으로 기후변화로 인해 슈퍼태풍 및 극한 강우, 폭설과 한파, 온난화 현상이 발생하고 있으며, 한반도의 기후변화는 전 세계 평균보다도 빠르게 진행되고 있다. 특히 북한지역은 오랜 식량난과 에너지난으로 산림생태계가 훼손되어 홍수 및 이수와 같은 기후변화 관련 자연재해에 매우 취약하며, 무분별한 도시화에 따른 불투수층의 증가로 인해 유역내의 수문순환요소가 변화하고 있다. 이러한 기후변화에 효율적으로 대처하기 위해서는 체계적이고 과학적인 기상 및 기후정보의 활용이 중요하다. 하지만 본 논문의 대상지역인 북한지역은 우리가 수문자료를 구하기가 힘들고, 직접 측정 할 수 없기 때문에 수문순환분석에 한계가 있다. 따라서 본 논문에서는 WMO에서 제공하고 있는 북한의 27개 기상관측소의 강수량, 기온자료를 제공 받아 분석에 사용하였다. 본 논문에서는 기상정보를 이용하여 각 관측소별 잠재 증발산량을 산정하였으며, 또한 lumped conceptual model 인 WASMOD 모형을 이용하여 북한 미계측 유역의 유출량을 산정 하였다. 이렇게 산정된 수문순환요소 시계열 자료를 이용하여 통계분석, BCP, 유황분석등 시계열 분석을 통해 북한지역의 수문순환특성을 파악하고자 한다.

• Analytical Science and Technology
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• v.20 no.1
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• pp.41-48
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• 2007

The determination method for the trace lead and cadmium in glass materials was developed by ICP-AES. The lead- and cadmium-DDTC chelates were formed by adding Na-DDTC (sodium diethyldithiocarbamate) as a chelating agent and extracted into MIBK (methyl-isobutyl ketone). Direct measuring of the trace lead and cadmium in glass was not possible because of the interferences of matrix elements as Na, Si, Mg and Ca of glasses unless solvent extraction of lead and cadmium was applied. This procedure was confirmed to be valid quantitative method of Pb and Cd analysis in glass did not influence of sample matrix, by applying it procedure to artifact sample and NIST SRM 1412.

• Journal of the Korea institute for structural maintenance and inspection
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• v.11 no.4
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• pp.129-137
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• 2007

An algorithm is proposed for estimating axle loads of trucks moving over a bridge by measuring dynamic responses. The bridge was modeled by a beam structure in the current applications of the proposed algorithm. Among the state vectors, measured acceleration was used and displacement was computed from measured strain at the same location. Nodal force vectors were computed by using a ready-made database of equivalent nodal force transformation matrix. The algorithm was examined through simulation studies and laboratory experiments. The effects of measurement noise and velocity error were investigated through simulation studies.

• Journal of the Korean Society of Food Science and Nutrition
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• v.23 no.5
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• pp.799-804
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• 1994

In order to study the antitumoral effect of Selaginella tamariscina extract, the cytotoxicities to human histiocytic lymphoma (U937) and lymphocyte were measured by MTT method. The water extract of Selaginella tamariscina showed the effective cytoxicity and increased the cytotoxicity of doxorubicine, cyclophosphamide on U937, but it has no effect on the cytotoxicity of lymphocyte. The cytotoxicity increased with the addition of other antineplastic agents but decreased with the combination of antineoplastic agent and Selaginella tamariscina in the lymphocyte. The results indicted that the side actions of retinoic acid, doxorubicine and cyclophosphamide decreased by addition of Selaginella tamariscina water extracts.

• Environmental and Resource Economics Review
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• v.20 no.3
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• pp.419-457
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• 2011

This study aims at understanding the characteristics of global economic models, which are widely used for climate change policy analysis. A literature review study was conducted in order to derive general features of top-down models such as CGE and bottom-up/hybrid models such as GTEM. Furthermore, a structural analysis was carried out by applying parameter and structural components from other models to a particular model to observe the potential differences in outcomes. Literature review shows that bottom-up or hybrid models generally have higher level of reduction potentials than top-down models in the long run. This contradicts the conclusion presented by IPCC, and raises the need for more rigorous investigation through structural analysis. Structural analysis of EPPA model indicates that the structural component of the energy sector in a particular model is the most influential factor in predicting baseline emissions and reduction potentials. This includes the structure among energy, capital, and labor inputs, and the substitution elasticities within the energy bundle. Technology bundle can establish the conclusions from literature review, and change in Armington elasticities do not significantly affect the outcome in aggregate.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.31 no.2B
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• pp.109-119
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• 2011

In this study, the flow characteristics of Han River Estuary were investigated by using a two-dimensional numerical model according to the assumption of shift and modification of the Shingok submerged weir. The two-dimensional analysis has contributed to our understanding of the hydraulic effects induced by shift of the weir on the topography, especially wetlands. The tide and flow discharge of 2007 were adopted as an input data for the simulation. The tidal data contained both spring and neap tide, and the flow discharge condition was divided into monsoon and normal seasons. The boundaries of this study were Hangang Bridge, Tongil Bridge, and Yu island. The simulation results showed that influence area of seawater changed depending on the weir shift, and the water level at particular station fluctuated according to the condition of tide and flow discharge.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.4
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• pp.2556-2563
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• 2015

This study aims to find out the employment effectiveness of employment preparation activities that college students experience, especially focused on analyzing employment effects of college employment-related activities such as career choice and employment support program, along with individual preparation activities such as qualification, vocational training, etc. It performed binary logistic regression analysis using 2011 Graduates Occupational Mobility Survey data of 3,249 college graduates. The results showed that In college characteristics, the higher grade point average was and the more college was located in non-metropolitan area, the higher employment probability was. In the case of major field, Medicine, Education, Engineering, Social Science, Natural science in highest first order had employment probability higher than the reference group. The results showed that the number of qualification, interview skill & resume description skill program participation, and job search experience before and after graduation among employment preparation activities had an effect on employment. The rest, that is, vocational training, career employment curriculum, work experience program, career counseling program, employment camp, in-school job experience, employment goal status before graduation did not have an direct effect on employment.