동북아 안보와 중국의 역할 : 중국의 안보 정책과 군사 전략을 중심으로

이태환 한국전략문제연구소 1997 전략연구 Vol.4 No.1

This study attempts to examine the question as to what role China could play in maintainining security in East Asia. Whether China can be a threat to East Asian security is not an easy question to answer. In order to explore the answer to the question, the article describes China's security policy and the trend of military buildup by examining the perceptions of Chinese leaders on the international situation, military strategies, military capability and analyzes factors affecting the future role of China in East Asia. The findings of the paper are as follows: First, China's security policies based on the perceptions on the changing international environment have changed from the defensive and military into active and comprehensive ones. The military strategic front has expanded from border areas and offshore to surrounding sea including the South China Sea and the East China sea. Second, the primary purpose of increasing defense budget is to prevent th eindependence movement of Taiwan and to prepare against the military contingencies in the South China Sea and East China Sea. Third, with its economic growth China will play an increasingly important role in restructuring the order in the world as well as Northeast Asia. However, China will not be a major threat to the East Asian security. Rather it is likely to play a balancing role in Northeast Asia. Fourth, domestic and internatoinal factors would affect the future role of China. The factors include the sustainability of China's economic development, domestic political situation, the U.S. policy toward China and Japanese policy toward China. In sum, the future role of China depends on 1) its strategy and institutions with which China will adapt itself and respond to the changing international environment and 2) international opportunities and constraints mainly derived from the interaction with major powers in the region including the United States and Japan.

중국국제정치학회와 교류 협력 시작과 학회 소개

이태환 한국국제정치학회 2005 한국국제정치학회소식 Vol.117 No.-

2005년 한해를 마무리 하면서

이태환 한국국제정치학회 2005 한국국제정치학회소식 Vol.117 No.-

한중관계에서 통일외교의 방향과 과제

이태환 한반도선진화재단 2014 선진화 정책시리즈 Vol.- No.-

(사)현대중국학회 정관

이태환,박우성,금희연,장경섭,이근,김익수,정영록,안인해,신상진,이희옥 현대중국학회 2006 現代中國硏究 Vol.8 No.1

구두발표 / 불소화학분과 : 활성산소원을 이용한 헥사플로오로프로필렌 에폭사이드의 합성

이태환,우주영,이희우,김훈식,김흥곤 한국공업화학회 2001 한국공업화학회 연구논문 초록집 Vol.2001 No.1

N/A N/A

딥러닝을 이용한 평판에서의 과도 전도 열전달에 대한 연구

이태환,박진현 한국기계기술학회 2020 한국기계기술학회지 Vol.22 No.5

The temperature distributions were numerically calculated for the two-dimensional transient conduction heat transfer problem of a square plate. The obtained temperature distributions were converted into colors to create images, and they were provided as learning and test data of CNN. Classification and regression networks were constructed to predict representative wall temperatures through CNN analysis. As results, the classification networks predicted the representative wall temperatures with an accuracy of 99.91% by erroneously predicting only 1 out of 1100 images. The regression networks predicted the representative wall temperatures within errors of C. From this fact, it was confirmed that the deep learning techniques are applicable to the transient conduction heat transfer problems.

In Search of a South Korea-U.S.-China Trilateral Dialogue in Northeast Asia

이태환 국방대학교 국가안전보장문제연구소 2007 The Korean Journal of Security Affairs Vol.12 No.1

The purpose of the article is to discuss and explore why and in which areas a trilateral security dialogue between the ROK, the U.S., and China can be promoted. The most important factors promoting the trilateral dialogue is the stabilized relationship between the U.S. and China and uncertainty in the Korean peninsula and Northeast Asia. This article argues that a trilateral security dialogue between the ROK, the U.S. and China is desirable for the following reasons. First, U.S.-China relations have been stabilized to the extent that both countries have bilateral strategic dialogues. Second, bilateral strategic dialogues between the U.S. and China are not enough for peace and stability in the region as the North Korean nuclear issue shows. The Six Party Talks are not enough and it is a long way to go to have a multilateral security cooperation mechanism. So it is needed to have a mini-multilateral security mechanism such as a trilateral dialogue medium term. Third, it is desirable because it could reduce the security dilemma between the countries concerned by coordinating their capabilities as well as intentions. And, fourth, it promotes regional security cooperation as a stepping stone for building a region wide security cooperation mechanism. The article suggests the issue areas which can be addressed and discussed in the trilateral dialogue. The issues include the North Korean nuclear issue, building a peace regime on the Korean Peninsula, and regional stability and order. The article argues that the ROK should be able to persuade the U.S. and China that trilateral dialogue helps them to keep their stakes in the Korean Peninsula and that their interests including regional stability can be more easily achieved in cooperation with the ROK. It also argues that the trilateral dialogue should start from the security dialogue at the NGO level and develop into a strategic dialogue at the governmental level later.

조세함수를 이용한 소득세제의 누진성 분석 - 근로소득세 천분위 자료를 중심으로

이태환 한국재정학회 2022 재정학연구 Vol.15 No.2

In September 2018, a rare tax data from the National Tax Service was opened to the public for the first time. It contains gross income, tax base, and the effective labor income tax for 1,000 equal-sized groups of the entire taxpayers, from 2013 to 2016, providing the most accurate and detailed statistics of labor income tax so far in Korea. Using this novel data, I estimate 4 of well-known tax functions and analyze the average effective tax rates and progressivity among other characteristics of Korea’s labor income tax. The average effective tax rates were increasing from 4.48% to 5.18% during this period but still very low compared to the statutory tax rates. The 2014 tax reform’s effect is confirmed as expected, raising the average effective tax rates and progressivity at the same time. I find out that Korea’s labor income tax structure can be accurately approximated by estimating 2-parameter or 3-parameter tax functions. The estimation results also support the 2014 tax reform’s effects on raising effective rates and progressivity. 한국 소득세제는 2010년대에 많은 변화를 겪었으며, 그중에서도 2014년 소득세법 개정은 최고세율구간 확대, 각종 소득공제의 세액공제 전환 등으로 주목을 받았다. 본 논문에서는 국세청이 최초로 공개한 2013년부터 2016년까지의 근로소득세 천분위 자료를 이용해 조세함수를 추정하고, 2014년 소득세법 개정의 효과를 실효평균세율 및 누진성을 중심으로 분석한다. 먼저 근로소득세의 소득공제율이 상당히 높다는 것을 확인했으며, 그 결과 2013년부터 2016년까지 과세표준 기준으로 90%~95%의 납세자가 하위 2개 세율구간(6%와 15%)에 속해 있었고, 실효평균세율은 2013년 4.48%로 매우 낮았다. 2014년 세법개정 이후 실효평균세율은 2016년 5.18%까지 상승하였고, 누진성도 2014년에 높아진 것이 확인된다. 이 자료를 이용해 2모수 또는 3모수 조세함수를 추정한 결과 설명력이 매우 높게 나타났으며, 추정된 조세함수는 근로소득세의 누진성이 2014년에 분명히 강화되었고 2015년과 2016년에는 소득세제 상 특별한 구조적 변화가 없었음을 보여주고 있다.

Effect of Berberine on Cell Survival in the Developing Rat Brain Damaged by MK-801

이태환,허훈,Yunhee Kim Kwon 한국뇌신경과학회 2010 Experimental Neurobiology Vol.19 No.3

Berberine is an isoquinoline alkaloid isolated from goldenthread, Coptidis Rhizoma and shown to have many biological and pharmacological effects. We previously reported that berberine promotes cell survival and differentiation of neural stem cells. To examine whether berberine has survival promoting effect on damaged neuronal cells, we generated a cellular model under oxidative stress and an neonatal animal model of degenerating brain disease by injecting MK-801. MK801, a noncompetitive antagonist of N-methyl-d-aspartate (NMDA) receptors, acts as a neurotoxin in developing rats by inhibiting NMDA receptors and induce neuronal cell death. We found that the survival rate of the SH-SY5Y cells under oxidative stress was increased by 287% and 344%, when treated with 1.5 and 3.0Ռg/ml berberine, respectively. In the developing rats injected by MK801, we observed that TUNEL positive apoptotic cells were outspread in entire brain. The cell death was decreased more than 3 fold in the brains of the MK-801-induced neurodegenerative animal model when berberine was treated to the model animals. This suggests that berberine promotes activity dependent cell survival mediated by NMDA receptor because berberine is known to activate neurons by blocking K+ current or lowering the threshold of the action potential. Taken together, berberine has neuroprotective effect on damaged neurons and neurodegenerating brains of neonatal animal model induced by MK-801 administration.