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정용승,Jeong, Yong-Seung 한국과학기술단체총연합회 2002 과학과 기술 Vol.35 No.5
황사 - 학술적으로는 '모래/먼지 폭풍'이라 불리우는 황사구름이 한반도를 덮쳤다. 그것도 한반도에서 황사를 관측한 이래 최악의 농도를 가진 인체에 유해한 상태였다. 정부는 전국에 황사 비상령까지 내렸고 초등학교는 휴교까지 했다. '황사태풍' 또는 '모래/먼지 폭탄'이라고 불리웠던 지난 3~4월의 황사에 대해 인공위성으로 추적하는데 성공한 대기환경연구실 정용승박사에게 듣는다.
정용승,목정환 한국계량경제학회 2019 계량경제학보 Vol.30 No.1
This paper addresses implementable, optimal macroprudential and monetary policies in a standard DSGE model augmented with nominal price and wage rigidities and housing sector. The paper also discusses the effect of introducing of time-varying LTV regulation in cooling down large swings of household debt. In particular, it examines macroprudential policy reacting to credit growth or housing price growth to dampen the excessive volatility of household debt. The paper shows that the time-varying macroprudential policy rules reacting to the debt to income ratio or to the credit growth are more effective in moderating the household debt swings to exogenous shocks than the time-varying macroprudential policy rule responding to the housing price growth. In particular, the time-varying macroprudential policy reacting to debt to borrower's labor income is most effective in moderating the debt fluctuations to housing demand shocks. The macroprudential policy reacting to the housing price growth is almost indifferent to the time-invariant macroprudential policy when the economy is hit by the house demand shock. The time-varying macroprudential policy is against the winds in the sense that the LTV ratio goes down when the economy expands with an increase in housing price and demand. The paper shows that there is a substantial welfare increase associated with the time-varying macroprudential policy compared to the time-invariant macroprudential policies.
정용승 한국국제경제학회 2001 국제경제연구 Vol.7 No.3
본고에서는 소규모개방경제의 실물경기변동론이 우리 나라의 경기변동을 얼마나 적절하게 설명하는지를 Watson(1993)의 모형의 적합성 기준을 통하여 살펴보았다. 단순한 2차적률만의 비교하는 경우와는 달리 실물경기변동론 모형의 우리 나라 경기변동에 대한 설명력은 매우 낮은 것으로 나타났다. 이러한 실물경기변동론의 낮은 설명력은 우리 경제에 존재하는 다양한 시장의 마찰적 요인과 이에 따른 여타의 충격이 우리 나라의 경기변동에 있어서 중요한 요인으로 작용하고 있음을 시사하는 것으로 보인다.
개방경제하 한국의 재정정책과 통화정책의 동태적 경제효과 분석
정용승,김성순 한국재정학회 1998 재정논집 Vol.13 No.1
This paper evaluates theoretically and quantatively the relative importance of monetary versus fiscal shocks in a small open economy. A stochastic dynamic general equilibrium model with a transaction cost is used to perform numerical simulations about Korean economy. The results show that fiscal and monetary shocks play important roles and can reproduce several empirical regularities, and they also show that fiscal shock plays more important role to the economy-aggregate variables such as investment, consumption, output, exchange rate and labor supply-than monetary shock does when embodied productive public capital to the production function in Korea. It also shows that a positive government spending shock causes prices to increase even if the resource is directed to the productive sector.
1997~2000년에 관측된 황사의 농도와 부하량 및 시정 : 위성과 기상 분석 Satellite and Meteorological Analysis
정용승,김학성,박기현,전종갑,첸수젠 한국교원대학교 환경과학연구소 2001 환경연구논문집 Vol.- No.6
This Korea-China study was to monitor the phenomena of yellow sand(YS) occurred during the period of 1997~2000. The analysis on observed data included ground measurements of dust concentration, visibility, satellite imagery, aircraft and lidar observations. In addition, an estimation of atmospheric loadings and study on the relationship between dust concentrations and visibility were carried out. The movement and invasion of YS clouds to Korea were clearly identified with meterological and satellite data. The increasing concentrations of TSP and PM10 agreed well with the satellite information. We define the YS episode with the following values: TSP ≥250, PM10 ≥190 ㎍m-3, and visibility 6.5 km or less. From case studies, we estimated that atmospheric loadings of a dust cloud were over 1 million ton and that the deposition over the Korean Peninsula was in the range of 46,000 and 86,000 ton. For the YS with visibility 3 km, we predict TSP 659 ㎍m-3, PM10 493 ㎍m-3. We recommend the issuance of the YS Watch (advisory) and the YS Warning for the general public. There is a need for the general use of dust collectors in the indoor environment to reduce YS concentrations in spring.
정용승 한국환경교육학회 1992 環境 敎育 Vol.3 No.1
The occurrence of acid precipitation in Japan is one of major concerns among Japanese scientists in environmental sciences. The annual mean pH observed is in the range of 4.6-4.8 and these values are higher than the values observed at the background stations in Korea and Northern China. We interpret that the low pH values occurring in Japan are mainly due to the precursors originating from Japan and from Southern China. In view of environmental education, interestingly the Prime Minister of Japan directly gives administrative support for acid rain monitoring and related studies Also, Japanese provide environmental education for their children in primary and secondary schools to instill 'green' concept. It is found that the role of scientists, media, governments and industries in Japan is very efficient for the increase in co-operation and environmental benefits.