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A new, three-phase, single-stage, isolated ac–dc converter (rectifier) that employs only two switches and achieves less than 5% total harmonic distortion of the three-phase input currents and provides a tightly regulated, isolated, output voltage is introduced. The rectifier features zero-voltage-switching of both switches over the entire input and load range without any additional soft-switching circuitry. The rectifier is derived by combining the three-phase, power-factor-correction, discontinuous-current-mode boost rectifier that is also known as Taipei rectifier with the conventional LLC resonant half-bridge converter. The introduced rectifier requires single feedback loop with frequency control to regulate the output voltage. The evaluation was performed on a 1-kW prototype operating with a three-phase line-voltage range from 180 to 264 $V_{\text{L}-\text{L}}$ and delivering a tightly-regulated, isolated, output voltage of 54 V. The measured efficiency of the prototype at nominal line voltage VIN = 208 VL-L is above 95% from 90% of full load down to 50% of full load. The maximum voltage stress is approximately 430 V. [ABSTRACT FROM AUTHOR]

Urban governance involves institutional rules that can be combined to serve aims of providing and delivering public welfare and services. Such combination can be achieved by engaging stakeholders holding respective resources and power into a rule-structured interaction to orient the collective outcome towards a more favourable end, while the conflicts among actors remain as the governance imperative in the urban renewal arena. This paper aims to elucidate against this background of urban renewal governance and consequences of its resource mobilization by comparing three high-density Asian cities from north to south: Taipei, Hong Kong and Singapore all with a Chinese cultural background. The comparative study investigates the capacity of actors and implications of instrumental tools to mobilize non-state resources in different urban renewal governances. In particular, the assembly of, concession in, incentive for, and transfer of plot ratio, are further accentuated as the said manipulation by public authorities, private sectors, and the community. The findings identify the practical utilities rooted in the manipulation of plot ratios to fuel the redevelopment projects, and highlight that while the mobilization of non-state resources relieves the government deficit of service delivery, the value-laden governance approach and policy instruments for resource mobilization can also strengthen the unbalanced power relations between actors and have consequences on various aspects. As urban governance evolves in response to local and global pressures, the findings in this paper will shed light on the future of urban renewal governance. • A comparative study of urban renewal governances in terms of plot ratio regimes. • Utilities of plot ratio schemes conducive to redevelopment are identified. • Outcomes of urban renewal governances regarding plot ratio controls are identified. [ABSTRACT FROM AUTHOR]