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Regulatory Performance (regulatory + performance)
Selected AbstractsVolume natriuresis vs. pressure natriuresisACTA PHYSIOLOGICA, Issue 4 2004P. Bie Abstract Body fluid regulation depends on regulation of renal excretion. This includes a fast vasopressin-mediated water-retaining mechanism, and slower, complex sodium-retaining systems dominated by the renin,angiotensin aldosterone cascade. The sensory mechanisms of sodium control are not identified; effectors may include renal arterial pressure, renal reflexes, extrarenal hormones and other regulatory factors. Since the pioneering work of Guyton more than three decades ago, pressure natriuresis has been in focus. Dissociations between sodium excretion and blood pressure are explained as conditions where regulatory performance exceeds the precision of the measurements. It is inherent to the concept, however, that sudden transition from low to high sodium intake elicits an arterial pressure increase, which is reversed by the pressure natriuresis mechanism. However, such transitions elicit parallel changes in extracellular fluid volume thereby activating volume receptors. Recently we studied the orchestration of sodium homeostasis by chronic and acute sodium loading in normal humans and trained dogs. Small increases in arterial blood pressure are easily generated by acute sodium loading, and dogs appear more sensitive than humans. However, with suitable loading procedures it is possible , also acutely , to augment renal sodium excretion by at least one order of magnitude without any change in arterial pressure whatsoever. Although pressure natriuresis is a powerful mechanism capable of overriding any other controller, it seems possible that it is not operative under normal conditions. Consequently, it is suggested that physiological control of sodium excretion is neurohumoral based on extracellular volume with neural control of renin system activity as an essential component. [source] Regulatory regimes and accountabilityREGULATION & GOVERNANCE, Issue 1 2007Peter J. May Abstract This research considers accountability issues for new forms of regulation that shift the emphasis from prescribing actions to regulating systems or regulating for results. Shortfalls at various levels of accountability are identified from experiences with these regimes in the regulation of building and fire safety, food safety and nuclear power plant safety. These experiences illustrate how accountability shortfalls can undermine regulatory performance and introduce a potential for subtle forms of regulatory capture. These concerns underscore the importance of finding the right fit between regulatory circumstances and the design of regulatory regimes. [source] Green Clubs and Voluntary Governance: ISO 14001 and Firms' Regulatory ComplianceAMERICAN JOURNAL OF POLITICAL SCIENCE, Issue 2 2005Matthew Potoski Voluntary programs have become widespread tools for governments and nongovernmental actors looking to improve industry's environmental and regulatory performance. Voluntary programs can be conceptualized as club goods that provide nonrival but potentially excludable benefits to members. For firms, the value of joining a green club over taking the same actions unilaterally is to appropriate the club's positive brand reputation. Our analysis of about 3,700 U.S. facilities indicates that joining ISO 14001, an important nongovernmental voluntary program, improves facilities' compliance with government regulations. We conjecture that ISO 14001 is effective because its broad positive standing with external audiences provides a reputational benefit that helps induce facilities to take costly progressive environmental action they would not take unilaterally. [source] Optimal control of fuel processing system using generalized linear quadratic Gaussian and loop transfer recovery method,,ASIAN JOURNAL OF CONTROL, Issue 5 2010Huan-Liang Tsai Abstract This paper proposes an optimal control system that consists of both feedforward and state-feedback controllers designed using a generalized linear quadratic Gaussian and loop transfer recovery (GLQG/LTR) method for a fuel processing system (FPS). This FPS uses natural gas as fuel and reacts with atmospheric air through a catalytic partial oxidation (CPO) response. The control objective is focused on the regulatory performance of the output vector in response to a desired stack current command in the face of load variation. The proposed method provides another degree of freedom in the optimal control design and gives the compensated system a prescribed degree of stability. Finally, the numerical simulations of compensated FPS reveal that the proposed method displays better performance and robustness properties in both time-domain and frequency-domain responses than those obtained by the traditional LQ Method. Copyright © 2010 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society [source] | ||||||||||