The move to preferential trade on the Western Pacific Rim: some initial conclusions

Since? ? Research for this project has been supported by the Australian Research Council through Discovery Project Grant No. DP0453077. View all notes the turn of the century the Asia-Pacific region has become the most active location for the negotiation of preferential trade agreements (PTAs)—a dramatic change from the period before the financial crises of 1997–98. Substantial variance in scope exists among the more than 80 PTAs currently being implemented, negotiated or which are under study in the region. Those involving the United States are by far the most comprehensive. At the other end of the spectrum are those involving ASEAN and China, which are largely ‘aspirational’ in their provisions. This variance points to the range of economic and political objectives that PTAs serve. Regardless of the comprehensiveness of their coverage, the overall economic effects of the new PTAs is likely to be small given the prevailing low level of tariffs, the intervention of other factors such as fluctuating exchange rates, the proliferation of agreements (which removes the advantages they accord individual partners), and the unwillingness of governments to liberalise ‘sensitive’ sectors. Few of the agreements move substantially beyond existing WTO provisions. The proliferation of PTAs not only has tended to shift attention and resources away from negotiations at the global level but also runs the risk of fragmenting the ‘pro-liberalisation’ coalition in countries that have signed multiple agreements.     

SEISMIC RESPONSE CONTROL OF CABLE-STAYED BRIDGE USING DIFFERENT CONTROL STRATEGIES

The goal of this research is to study the effect of cable vibration through a number of control cases of a cable-stayed bridge. In order to consider the complicated dynamic behaviour of the full-scale bridge, a three-dimensional numerical model of the MATLAB-based analysis tool has been developed by the complete simulation of the Gi-Lu bridge. The dynamic characteristics of cables in the cable-stayed bridge are verified between the field experiment and the result from numerical simulation using geometrically nonlinear beam elements in MATLAB program. Three types of control devices are selected to reduce the response of the bridge deck which includes: actuators, viscous-elastic dampers with large capacity, and base isolations. Moreover, two types of control devices, MR dampers and viscous dampers, are installed either between the deck and cables and/or between two neighbouring cables for controlling the cable vibration. A modified bi-viscous model combined with convergent rules is used to describe the behaviour of MR dampers. Finally, through evaluation criteria the control effectiveness on the cable-stayed bridge using different control strategies is examined.     

SEGMENTAL CROSS-SPECTRUM AS A NEW TECHNIQUE IN SITE RESPONSE ESTIMATION USING SPECTRAL RATIO ANALYSIS

Different aspects of spectral analysis for site response evaluation are investigated in this study. The segmental cross-spectrum is proposed in spectral analysis of earthquake ground motions. The performance of segmental cross-spectrum in contrast with the conventional methods is investigated through the mathematical modelling, numerical analysis and application to earthquake data recorded at Chiba and Shinfuji downhole arrays in Japan. In analysis of earthquake data, the soil amplification function is identified using both uphole/downhole (U/D) and H/V spectral ratios. The advantage of seg-mental cross-spectrum is assessed by comparing identified amplification functions using different spectral methods and theoretical soil response. The reliability of site response estimations obtained by H/V spectral ratio using segmental cross- and Fourier spectra is also examined by means of cross-validation with the U/D spectral ratio of earthquake motion and theoretical soil response. Furthermore, the application of segmental cross-spectrum in nonlinear soil response is examined by comparing the amplification function of weak and strong motions for both methods. The results validate the advantage of segmental cross-spectrum in both linear and nonlinear soil response, particularly, when it used with H/V technique.     

Evaluation of the Nonlinear Seismic Response of an Earth Dam: Nonparametric System Identification

A system identification framework is proposed to investigate the nonlinear dynamic response of massive earth dams using the seismic motion recorded by a sparse array of accelerometers. The framework includes a methodical step of nonparametric analyses to characterize the involved loading conditions and response mechanisms. This nonparametric step provides essential information to reduce the indeterminacy of the associated parametric identificatin problem and ensure a proper model selection, calibration, and validation. The proposed framework was applied to the Long Valley earth dam (California) and benchmarked using records of a series of 1980 earthquakes. This article presents the conducted correlation, spectral motion reconstruction, and nonparametric stress-strain analyses. These analyses revealed a complex three-dimensional dynamic response marked by non uniform boundary conditions and a shear stress-strain behavior slightly less nonlinear than what was observed in triaxial tests of soil samples taken from the dam core.     

In Praise of the Ordinary Man: Popular Media,Social Hierarchy and Identity in a North Indian Text

This article recounts a story found in a popular genre of religious literature known as vrat katha[ritual storytelling]. The narrative is of an “ordinary” low-caste man and his everyday struggles. It tells of the social and economic suffering experienced by the poor man upon encountering god (called Trilokinath/Vishnu) and receiving his blessing, mediated through a series of miraculous events. However, the transformative power of the events and fortunes that follow is undermined by a Brahmin who refuses to acknowledge the poor devotee, rebuffing his ritual gift [prasad] as polluted and considering him untouchable. The ambiguous nature of the gift and the ideology and practice of devotion [Bhakti] present an intriguing and complex picture of Hinduism, revealed in the multiple social roles and social contexts in which subalterns operate in the course of their day-to-day lives.

?I offer a critical reading of this fascinating story. What seems like a straightforward, standardised ritual text is analysed in terms of its competing and sometimes subversive views of “dominant” Hinduism. By examining the tensions and ambivalence in the text I argue for a more nuanced rendition of subaltern power and agency which cannot be reduced to that of resistance and opposition alone.     

RELIABILITY AND APPLICABILITY OF NAKAMURA'S TECHNIQUE USING MICROTREMORS: AN EXPERIMENTAL APPROACH

Nakamura's technique has been widely discussed from the theoretical point of view. Very little information is available as far as the experimental, on-the-field standpoint is concerned. A series of experiments under controlled conditions were set up to assess the reliability and applicability range of this microtremor technique. Since this approach to microzonation is particularly appealing in urban environments, great care was devoted to evaluate the influence of factors such as anthropic noise, concrete or asphalt coverings and soil-structure interaction. Environmental factors (wind) and the influence of sensors were also considered. The results were compared with the seismic response from four earthquakes. The set of experiments shows that under proper measurement conditions Nakamura's technique provides stable and reliable results, but great care has to be devoted to avoid factors that may significantly and adversely affect the results.