Global energy consumption is projected to increase, even in the face of substantial declines in energy intensity, at least 2-fold by midcentury relative to the present because of population and economic growth. This demand could be met, in principle, from fossil energy resources, particularly coal. However, the cumulative nature of CO(2) emissions in the atmosphere demands that holding atmospheric CO(2) levels to even twice their preanthropogenic values by midcentury will require invention, development, and deployment of schemes for carbon-neutral energy production on a scale commensurate with, or larger than, the entire present-day energy supply from all sources combined. Among renewable energy resources, solar energy is by far the largest exploitable resource, providing more energy in 1 hour to the earth than all of the energy consumed by humans in an entire year. In view of the intermittency of insolation, if solar energy is to be a major primary energy source, it must be stored and dispatched on demand to the end user. An especially attractive approach is to store solar-converted energy in the form of chemical bonds, i.e., in a photosynthetic process at a year-round average efficiency significantly higher than current plants or algae, to reduce land-area requirements. Scientific challenges involved with this process include schemes to capture and convert solar energy and then store the energy in the form of chemical bonds, producing oxygen from water and a reduced fuel such as hydrogen, methane, methanol, or other hydrocarbon species.
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One possible reason for the continued neglect of statistical power analysis in research in the behavioral sciences is the inaccessibility of or difficulty with the standard material. A convenient, although not comprehensive, presentation of required sample sizes is provided here. Effect-size indexes and conventional values for these are given for operationally defined small, medium, and large effects. The sample sizes necessary for .80 power to detect effects at these levels are tabled for eight standard statistical tests: (a) the difference between independent means, (b) the significance of a product-moment correlation, (c) the difference between independent rs, (d) the sign test, (e) the difference between independent proportions, (f) chi-square tests for goodness of fit and contingency tables, (g) one-way analysis of variance, and (h) the significance of a multiple or multiple partial correlation.
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"Michel Foucault has become famous for a series of books that have permanently altered our understanding of many institutions of Western society. He analyzed mental institutions in the remarkable Madness and Civilization; hospitals in The Birth of the Clinic; prisons in Discipline and Punish; and schools and families in The History of Sexuality. But the general reader as well as the specialist is apt to miss the consistent purposes that lay behind these difficult individual studies, thus losing sight of the broad social vision and political aims that unified them. Now, in this superb set of essays and interviews, Foucault has provided a much-needed guide to Foucault. These pieces, ranging over the entire spectrum of his concerns, enabled Foucault, in his most intimate and accessible voice, to interpret the conclusions of his research in each area and to demonstrate the contribution of each to the magnificent - and terrifying - portrait of society that he was patiently compiling. For, as Foucault shows, what he was always describing was the nature of power in society; not the conventional treatment of power that concentrates on powerful individuals and repressive institutions, but the much more pervasive and insidious mechanisms by which power "reaches into the very grain of individuals, touches their bodies and inserts itself into their actions and attitudes, their discourses, learning processes and everyday lives" Foucault's investigations of prisons, schools, barracks, hospitals, factories, cities, lodgings, families, and other organized forms of social life are each a segment of one of the most astonishing intellectual enterprises of all time -- and, as this book proves, one which possesses profound implications for understanding the social control of our bodies and our minds." http://www.loc.gov/catdir/description/random046/79003308.html.
This is a comprehensive guide to power system stability and control, written as a professional and student reference.
In his landmark study of exchange and power in social life, Peter M. Blau contributes to an understanding of social structure by analyzing the social processes that govern the relations between individuals and groups. The basic question that Blau considers is: How does social life become organized into increasingly complex structures of associations among humans. This analysis, first published in 1964, represents a pioneering contribution to the sociological literature. Blau uses concepts of exchange, reciprocity, imbalance, and power to examine social life and to derive the more complex processes in social structure from the simpler ones. The principles of reciprocity and imbalance are used to derive such processes as power, changes in group structure; and the two major forces that govern the dynamics of complex social structures: the legitimization of organizing authority of increasing scope and the emergence of oppositions along different lines producing conflict and change.
Feedback is one of the most powerful influences on learning and achievement, but this impact can be either positive or negative. Its power is frequently mentioned in articles about learning and teaching, but surprisingly few recent studies have systematically investigated its meaning. This article provides a conceptual analysis of feedback and reviews the evidence related to its impact on learning and achievement. This evidence shows that although feedback is among the major influences, the type of feedback and the way it is given can be differentially effective. A model of feedback is then proposed that identifies the particular properties and circumstances that make it effective, and some typically thorny issues are discussed, including the timing of feedback and the effects of positive and negative feedback. Finally, this analysis is used to suggest ways in which feedback can be used to enhance its effectiveness in classrooms.
The use of the fast Fourier transform in power spectrum analysis is described. Principal advantages of this method are a reduction in the number of computations and in required core storage, and convenient application in nonstationarity tests. The method involves sectioning the record and averaging modified periodograms of the sections.
Preface Editor's Introduction General Introduction Part I The Economy of Linguistic Exchanges Introduction 1. The Production and Reproduction of Legitimate Language 2. Price Formation and the Anticipation of Profits Appendix: Did You Say 'Popular'? Part II The Social Institution of Symbolic Power Introduction 3. Authorized Language: The Social Conditions for the Effectiveness of Ritual Discourse 4. Rites of Institution 5. Description and Prescription: The Conditions of Possibility and the Limits of Political Effectiveness 6. Censorship and the Imposition of Form Part III Symbolic Power and the Political Field 7. On Symbolic Power 8. Political Representation: Elements for a Theory of the Political Field 9. Delegation and Political Fetishism 10. Identity and Representation: Elements for a Critical Reflection on the Idea of Region 11. Social Space and the Genesis of 'Classes' Note Index
A framework for hypothesis testing and power analysis in the assessment of fit of covariance structure models is presented. We emphasize the value of confidence intervals for fit indices, and we stress the relationship of confidence intervals to a framework for hypothesis testing. The approach allows for testing null hypotheses of not-good fit, reversing the role of the null hypothesis in conventional tests of model fit, so that a significant result provides strong support for good fit. The approach also allows for direct estimation of power, where effect size is defined in terms of a null and alternative value of the root-mean-square error of approximation fit index proposed by J. H. Steiger and J. M. Lind (1980). It is also feasible to determine minimum sample size required to achieve a given level of power for any test of fit in this framework. Computer programs and examples are provided for power analyses and calculation of minimum sample sizes.
A comprehensive text on the operation and control of power generation and transmission systems In the ten years since Allen J. Wood and Bruce F. Wollenberg presented their comprehensive introduction to the engineering and economic factors involved in operating and controlling power generation systems in electric utilities, the electric power industry has undergone unprecedented change. Deregulation, open access to transmission systems, and the birth of independent power producers have altered the structure of the industry, while technological advances have created a host of new opportunities
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Power-law distributions occur in many situations of scientific interest and have significant consequences for our understanding of natural and man-made phenomena. Unfortunately, the detection and characterization of power laws is complicated by the large fluctuations that occur in the tail of the distribution -- the part of the distribution representing large but rare events -- and by the difficulty of identifying the range over which power-law behavior holds. Commonly used methods for analyzing power-law data, such as least-squares fitting, can produce substantially inaccurate estimates of parameters for power-law distributions, and even in cases where such methods return accurate answers they are still unsatisfactory because they give no indication of whether the data obey a power law at all. Here we present a principled statistical framework for discerning and quantifying power-law behavior in empirical data. Our approach combines maximum-likelihood fitting methods with goodness-of-fit tests based on the Kolmogorov-Smirnov statistic and likelihood ratios. We evaluate the effectiveness of the approach with tests on synthetic data and give critical comparisons to previous approaches. We also apply the proposed methods to twenty-four real-world data sets from a range of different disciplines, each of which has been conjectured to follow a power-law distribution. In some cases we find these conjectures to be consistent with the data while in others the power law is ruled out.
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MATPOWER is an open-source Matlab-based power system simulation package that provides a high-level set of power flow, optimal power flow (OPF), and other tools targeted toward researchers, educators, and students. The OPF architecture is designed to be extensible, making it easy to add user-defined variables, costs, and constraints to the standard OPF problem. This paper presents the details of the network modeling and problem formulations used by MATPOWER, including its extensible OPF architecture. This structure is used internally to implement several extensions to the standard OPF problem, including piece-wise linear cost functions, dispatchable loads, generator capability curves, and branch angle difference limits. Simulation results are presented for a number of test cases comparing the performance of several available OPF solvers and demonstrating MATPOWER's ability to solve large-scale AC and DC OPF problems.
Introduction to the Second Edition Basic Concepts and Themes Government and Governmentality An Analytics of Government Analyzing Regimes of Government Genealogy and Governmentality Genealogy and Government Liberalism, Critique and 'the Social' Neo-Liberalism and Foucault Dependency and Empowerment: Two Case Studies Dependency Empowerment Conclusion Pastoral Power, Police and Reason of State Pastoral Power Reason of State and Police Conclusion Bio-Politics and Sovereignty Bio-Politics Sovereignty and the Governmentalization of the State Liberalism Economy Security Law and Norm Society and Social Government Authoritarian Governmentality The Illiberality of Liberal Government Bio-Politics, Race and Non-Liberal Rule Neo-Liberalism and Advanced Liberal Government Society, Freedom and Reform Advanced Liberal Government A Post-Welfarist Regime of the Social Risk and Reflexive Government Two Approaches to Risk Risk and Reflexive Modernization Insurance and Government Reflexive Government International Governmentality Foucault and the International Building on Foucault Conclusion: 'Not Bad... but Dangerous' Postscript to the Second Edition: The Crisis of Neo-Liberal Governmentality?
Judging from the frequent occurrence of such words as power, influence, dominance and submission, status and authority, the importance of power is widely recognized, yet considerable confusion exists concerning these concepts. The process of cost reduction in power-dependence relations shows itself in many varied forms. Cost reduction is a process involving change in values which reduces the pains incurred in meeting the demands of a powerful other. The costs associated with alternatives must be included in any assessment of dependency. The chapter aims to construct a simple theory of the power aspects of social relations. It focuses on the characteristics of the relationship as such, with little or no regard for particular features of the persons or groups engaged in such relations. Social relations commonly entail ties of mutual dependence between the parties. The notion of reciprocity in power-dependency relations raises the question of equality or inequality of power in the relation.