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East Asia Free Trade Area: From ASEAN Plus One Perspective
Tran Nhuam Kien 대구대학교 경제경영연구소 2006 경제경영연구 Vol.4 No.1
This paper analyzes reasons and motivations for the initiative of the ASEAN+1 FTAs in the context of East Asia's regional economic integrating that such initiative marks the commencement of an East Asian FTA, and in succession triggers the East Asian economic integration, which will balance the two major regional arrangements in the world, EU and NAFTA. Using a gravity model, I have examined whether ASEAN+1 FTAs are trade creation or trade diversion between member and non member countries on the way of forming FTAs in East Asia. The empirical results in the paper suggest two important conclusions. First, GDP, population, area of member countries as well as distance and language connection show significant for East Asia regional trade. Second, all ASEAN+1 FTAs are open to trade with the rest of the world (i.e., no trade diversion). However, the establishment of ASEAN+1 FTAs would worsen the trade balances of member counties with the United States and Japan.
Effects of Channel Aging in Massive MIMO Systems
Kien T. Truong,Robert W. Heath, Jr. 한국통신학회 2013 Journal of communications and networks Vol.15 No.4
Multiple-inputmultiple-output (MIMO) communication may provide high spectral efficiency through the deployment of a very large number of antenna elements at the base stations. The gains from massive MIMO communication come from the use of multi-user MIMO on the uplink and downlink, but with a large excess of antennas at the base station compared to the number of served users. Initial work on massive MIMO did not fully address several practical issues associated with its deployment. This paper considers the impact of channel aging on the performance of massiveMIMO systems. The effects of channel variation are characterized as a function of different system parameters assuming a simple model for the channel time variations at the transmitter. Channel prediction is proposed to overcome channel aging effects. The analytical results on aging show how capacity is lost due to time variation in the channel. Numerical results in a multicell network show that massive MIMO works even with some channel variation and that channel prediction could partially overcome channel aging effects.
Solving and Resolving the East China Sea Dispute: Beijing`s Options
( Kien Hong Yu ) 한국국방연구원 2005 The Korean Journal of Defense Analysis Vol.17 No.3
In early 2005, the East China Sea (ECS) became a hotly-disputed area. mainly between the People`s Republic of China (PRC) and Japan. especially in view of the fact that in August 2005, for the first time in history, the price of light, sweet crude oil futures for October 2005 delivery on the New York Mercantile Exchange (NYMEX) crossed the US$70 per barrel mark. This paper explores what Beijing would likely do to solve or resolve its dispute with Tokyo, if not Taipei as well. It suggests, as a first step, the creation of a series of either international or bicoastal regimes, including between mainland China and Taiwan, which should be able to reduce tension between all the parties. By examining the PRC`s past words and deeds, the author has inductively pointed out options that mainland China can choose from to handle the dispute, such as dragging on as well as making compromises or adopting a fifty-fifty formula. Arguably, the PRC will try to solve or resolve the dispute in a peaceful way. In other words, it may first provoke, but not by firing the first shot. The Chinese Communist leaders are still adhering to their "paramount leader," Deng Xiaoping`s strategy of peace and development. In short, Beijing may have to make some concessions to Japan and/or Taipei for the sake of all concerned.
Seismic Demand Evaluation of Steel MRF Buildings with Simple and Detailed Connection Models
Kien Le-Trung,이기학,이재홍,이도형 한국강구조학회 2010 International Journal of Steel Structures Vol.10 No.1
A detailed connection model can take into account effects such as strength and stiffness degradation, pinching and brittle behavior while a simple one cannot. This study investigates the effects of using the detailed and simple connection models on the seismic behavior of steel moment resisting frame (MRF) buildings. The frame models designed by 1994 UBC and 2000IBC provisions involved the use of clear length dimensions of elements, panel zone models, and connection models subjected to suites of 20 accelerograms with 50/50, 10/50 and 2/50 hazard levels. The interstory drifts, column axial forces, and probability of building failure were investigated. The results show that the discrepancy of the building behaviors between using the detailed and simple connections became larger when the more severe seismic hazard levels and higher percentile values were considered. Therefore, the detailed connection models would be recommended to evaluate and predict seismic performance of steel MRF buildings.