• Journal of the Korean Society for Aviation and Aeronautics
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• v.27 no.4
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• pp.52-64
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• 2019

The purpose of this study is to analyze the impact of macroeconomic variables on air passenger demand and provide useful information to airport managers and policymakers. Therefore, using the quarterly macroeconomic indicators from 2002 to 2017, the relationship with air passenger demand was demonstrated by multiple regression analysis. In the previous studies, they used GDP, Korea Treasury Bond, KOSPI index, USD/KRW Exchange Rate, and WTI Crude Oil Price variables. In this study, we used the Coincident Composite Index, Employment Rate, Consumer Sentiment Index, and Private Consumption Rate used as additional variables. It has confirmed that if the consumption of research results expands or the economic environment is right, it will affect the increase in international passengers. In other words, it confirmed that the overall economic situation acts as the main factor determining air passenger demand. It confirmed that the economic environment at the past has a significant impact on air passenger demand.

• Journal of the Economic Geographical Society of Korea
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• v.16 no.1
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• pp.86-98
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• 2013

This study began with the fact that the relationship between eductional environments and housing price needs to be understood in the context of the structuring of socio-spatial disparity. In other words, this paper focuses on the fact that the eduction with public features and functions plays a role of housing price determination and the rising price is privatized only to cause socio-spatial inequality. The study first examines how the education factors determine the housing price and cause increasing social inequality in Seoul at the macro level. It also carried out more detailed quantitative analysis on the relationship between educational environment factors and housing price with the case study of Yangcheon-gu, Seoul. This study found out that the close relationship between educational environment, housing price and social disparity at various spatial scales. It also figured out the the educational environment factors play an important role of housing price determination as much as material features per se. This means that the relationship between education, housing price and inequality needs to be dealt with not just socially but also in spatial perspective. In addition, the housing price determination is not just technical research but an social science issue in the context of rising socio-spatial disparity. This study is of only significance as a starting point of promising related researches in the future and much more efforts will be needed.

• Economic and Environmental Geology
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• v.43 no.5
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• pp.523-528
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• 2010

With the financial crisis from USA had negative impacts on the real economy, base metals price on LME was downward in 4 quarter of 2008. Following the deepest global downturn in recent history, economic growth solidified and broadened to advanced countries and simultaneously the price of base metal on LME showed a rising curve over 2009. There are three factors supported an upward tendency of base metal's price. The First factor is the US economy recovery, the second factor is the weak dollar, the third factor is the chinese base metal demand. Among the factors, the last one is a major factor. Therefore, this study analyze the factor of the movement of price of base metal with linear regression analysis. The result of analysis show that the chinese GDP growth has effect on the recent upward base metal price. Despite the result, the upward movement is difficult to be sustained without the full recovery of advanced economies.

• Convergence Security Journal
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• v.21 no.3
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• pp.13-23
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• 2021

The attacker's techniques and tools are becoming intelligent and sophisticated. Existing Anti-Virus cannot prevent security accident. So the security threats on the endpoint should also be considered. Recently, EDR security solutions to protect endpoints have emerged, but they focus on visibility. There is still a lack of detection and responsiveness. In this paper, we use real-world EDR event logs to aggregate knowledge-based MITRE ATT&CK and autoencoder-based anomaly detection techniques to detect anomalies in order to screen effective analysis and analysis targets from a security manager perspective. After that, detected anomaly attack signs show the security manager an alarm along with log information and can be connected to legacy systems. The experiment detected EDR event logs for 5 days, and verified them with hybrid analysis search. Therefore, it is expected to produce results on when, which IPs and processes is suspected based on the EDR event log and create a secure endpoint environment through measures on the suspicious IP/Process.

• 한국벤처창업학회:학술대회논문집
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• 2021.04a
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• pp.125-130
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• 2021

코로나19 팬데믹은 삶의 많은 부분을 변화시켰다. 국가 간 통제 및 사회적 거리두기로 인한 직접적인 만남이 제한되고, 우리 생활의 많은 영역이 비대면으로 전환되었다. 이런 상황에서 의사소통 및 사회적, 경제적 교류를 위한 대안으로 레거시 미디어콘텐츠의 퇴조와 함께 소셜미디어 등의 뉴미디어 콘텐츠를 활용한 경제활동이 이루어지고 있다. 미디어콘텐츠를 기반한 경제 생태계는 복잡해지고 있으며, 플랫폼 간 경쟁 또한 매우 치열해지는 상황이다. 급속하게 변하고 있는 디지털 환경의 사회 구조는 경제 전반에 큰 영향을 주고 있으며, 경제활동을 지속하려는 개인과 정책지원을 하는 국가에도 중요한 현안이 되어 있다. 고령화 사회로의 빠른 진입으로 인적 자본의 활용 문제가 대두되고, 코로나19로 인한 경제불황이 대면 경제활동을 크게 위축시키면서 고용 감소와 불안정성이 대두되었다. 그에 따라 비대면 산업이 활성화되고, 플랫폼 산업 등 미디어콘텐츠 기반의 새로운 경제활동이 주목받고 일상화되었다. 또한 미디어콘텐츠 기반 비즈니스에 실효성 있는 인적 자본 활용이 국가의 주요 정책이 되었다. 따라서 본 연구는 미디어콘텐츠 활용과 신 정보화 도구를 활용한 디지털 역량이 경제활동 지속 의도에 어떤 영향을 미치는지에 대하여 실증적으로 분석하고 검증하여 실무적 시사점을 제시하고자 한다.

• The Korean Journal of Applied Statistics
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• v.33 no.5
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• pp.639-653
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• 2020

Baker et al. (Quarterly Journal of Economics, 134, 1593-1636, 2016) developed an Economic Policy Uncertainty (EPU) index for South Korea in the same way as the U.S. EPU Index. However, the South Korean EPU index of Baker et al. (2016) has limitations as it did not fully reflect South Korean situation in terms of keyword selection and the selection of newspapers. We develop monthly South Korean economic policy uncertainty indexes with different keywords and news media. Various analyses have been conducted in order to examine the usefulness of the newly compiled indexes.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.26 no.2B
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• pp.153-160
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• 2006

To recommend ecological flow for major tributaries in Han River basin, the Instream Flow Incremental Methodology (IFIM) have been applied. In particular physical habitat simulation using PHABSIM have been selected for microhabitat variables and QUAL2E model have been used to implement macrohabitat simulation. Habitat Suitability Criteria (HSC) for different life stages in accordance with different hydraulic variables (depth and velocity) have been presented by the field surveying data. We review IFIM procedures and discuss limitations of habitat simulation with specific reference to Han River basin. The results of this research can be used as reference flow for estimation of instream flow in Han River.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.30 no.2D
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• pp.105-111
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• 2010

Operating speed is one of key elements in the design and operation of freeway. Few studies have been carried out macroscopically to find characteristics of free-flow speed (FFS) using small sample size and not considering the conditions of traffic volume and the effects of hour periods. As an attempt to find out the characteristics of FFS, this study microscopically analysed both the distributions of freeway FFS and percentile speeds according to traffic volume and daily hour periods using huge sample size. It was found out that speed distributions are changed and showed different behaviors under the conditions of traffic volumes(1-5 veh/30sec) and daily hour periods(0-5, 6-8, 9-11, 12-19, 20-23). V85(85th percentile speed) at morning, night, and midnight period decreases according to increase in traffic volume respectively, whereas V85 at day time does not show considerable differences. So the behaviors of V85 according to hour periods dramatically changed according to the increase in traffic volume.

• KDI Journal of Economic Policy
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• v.13 no.3
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• pp.113-133
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• 1991

본고(本稿)는 국민생활수준(國民生活水準)에 영향을 주는 주요 거시(巨視) 및 미시지표(微視指標)의 국제비교를 통하여 우리나라가 추구해 온 개발전략(開發戰略)을 재조명(再照明)하고 우리의 현재좌표(現在座標)를 검토코자 집필되었다. 자료(資料)의 제한(制限), 국제비교(國際比較)에서 흔히 제기되는 평가(評價)의 문제 등에도 불구하고 국제비교분석(國際比較分析)은 유용한 수단(手段)이었으며 다음과 같은 정책적(政策的) 함의(含意)를 얻을 수 있었다. 지금까지 한국(韓國)이 추구한 개발정책(開發政策)의 역점(力點)은 대체적으로 경제성장(經濟成長)에 두어져 왔었다고 분석되고 있다. 이는 높은 경제성장률(經濟成長率)이나 1인당(人當) 소득(所得)의 지속적인 증가를 통하여 소비수준(消費水準)의 제고와 소비구조(消費構造)의 개선 등 국민생활수준(國民生活水準)의 향상으로 연결되고 있다. 더불어 소득분배(消費分配)를 위시하여 보건(保健), 영양지표(營養指標) 등 사회지표(社會指標) 측면에서도 개선되는 추이를 보이고 있는 것으로 평가된다. 이와 같은 개발정책(開發政策)의 성공적(成功的) 결실(結實)은 국민복지증진(國民福祉增進)에 크게 이바지한 것임에 틀림없으나 사회복지향상(社會福祉向上)을 위한 적극적인 노력은 미흡하였다. 지속적인 고도성장(高度成長)의 결과 국민생활향상(國民生活向上)을 위한 기본요건(基本要件)인 1인당(人當) 소득(所得)이 크게 증가되어 빈곤인구(貧困人口)가 꾸준히 줄어들고 있으나 생활(生活)을 둘러싸고 있는 경제(經濟) 사회적(社會的) 환경은 상대적으로 열악(劣惡)해지게 되었다. 앞으로도 산업화(産業化)와 도시화(都市化)가 계속될 전망임에 비추어 국민생활(國民生活)과 직접적으로 관련되는 생활여건(生活與件)의 개선(改善)에 대한 각별한 정책적(政策的) 배려(配慮)가 요청된다고 판단된다. 따라서 경제(經濟)의 안정적인 운영과 함께 국민생활수준(國民生活水準)의 내실(內實) 있는 향상을 기해 나가자면 고도성장(高度成長)이 준 부작용(副作用)을 극소화해 나가야 할 것이다. 삶의 질(質)에 대한 수용할 만한 국민적(國民的) 욕구(慾求)를 과감히 받아들여 사회개발(社會開發)에 돌려지는 공적지출(公的支出)을 꾸준히 늘려나가되 일본(日本)의 경험이 시사하는 것처럼 비용효과적(費用效果的)인 지출이 되도록 제도적 장치가 강구될 필요가 있을 것이다. 국민생활수준(國民生活水準)의 개선은 장기적(長期的)인 시각(視角)에서 비전과 일관성을 지니고 추진되어야 할 성질을 지니고 있기 때문이다.

• Environmental and Resource Economics Review
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• v.12 no.2
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• pp.275-298
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• 2003

This paper compares the economic effects of climate policy options in Korea. The impacts and implications of carbon and Btu tax schemes are analyzed using the META Net modeling system, which was developed at the Lawrence Livermore National Laboratory (LLNL). Findings indicate that carbon tax is more cost effective compared to Btu tax, but this does not necessarily mean the former is more desirable than the latter. Energy market stability and national energy security is equally important in choosing policy options. Moreover Btu tax is more effective in reducing energy consumption in general. It reduces not only carbon intensive energy sources, but non-fossil fuel like electricity. Korean economy consumes too much energy and energy efficiency is very low compared to other OECD countries. So the reduction of energy demand growth should be the first priority of the national energy policy in Korea.