Development of superconductive magnets

Survey of superconductive magnets considers - stabilization problems, advances in materials and their uses, and design evolution. Uses of superconducting magnets in particle accelerators and bubble chambers, as well as possible applications in magnetohydrodynamic and thermonuclear power generation and levitation are discussed

Scientific Management in Research Libraries

published or submitted for publicatio

Interorganizational Policy Studies: Lessons Drawn from Implementation Research

Contingency approaches to organizing suggest that policy objectives are more likely to be achieved if the structures employed for implementation mesh with the policy objectives being sought. Interorganizational arrangements are used increasingly in carrying out public programs, and contingency logic can be used to assess the degree of match between policy objective and interunit structure. Such a perspective would seem to offer an approach of practical significance. Here the contingency logic as applied to interorganizational implementation is reviewed and its assumptions identified. To probe these assumptions, empirical evidence is analyzed from one policy sector which would seem especially promising. The findings suggest that even under highly favorable conditions, a contingency perspective provides only limited help. The research demonstrates the need for additional conceptual clarification and theoretical care in reaching conclusions about the impact of interorganizational structures on policy settings

Implications for democracy of a networked bureaucratic world

Dwight Waldo wrote nearly fifty years ago that democracy is very much more than the political context in which public administration is carried out. Public administration is now less hierarchical and insular and is increasingly networked. This has important implications for democracy, including changing responsibilities for the public interest, for meeting public preferences, and for the enhancement of political deliberation, civility, and trust. Networked public administration can pose a threat to democratic governance and it can open possibilities for strengthening governance, depending on the values and actions of public administrators

Privatizing U.S. Social Security: some possible effects on intergenerational equity and the economy

Social security ; Privatization

From Deficit Delusion to the Fiscal Balance Rule: Looking For an Economically Meaningful Way to Assess Fiscal Policy

Notwithstanding its widespread use as a measure of fiscal policy, the government deficit is not a well-defined concept from the perspective of neoclassical macro economics. From the neoclassical perspective the deficit is an arbitrary accounting construct whose value depends on how the government chooses to label its receipts and payments. This paper demonstrates the arbitrary nature of government deficits. The argument that the deficit is not well-defined is first framed in a simple certainty model with nondistortionary policies, and then in settings with uncertain policy, distortionary policy, and liquidity constraints. As an alternative to economically arbitrary deficits, the paper indicates that the "Fiscal Balance Rule" is one norm for measuring whether current policy will place a larger or smaller burden on future generations than it does on current generations. The Fiscal Balance Rule is based on the economy's intertemporal budget constraint and appears to underlie actual attempts to run tight fiscal policy. It says take in net present value from each new young generation an amount equal to the flow of government consumption less interest on the difference between a) the value of the economy's capital stock and b) the present value difference between the future consumption and future labor earnings of existing older generations. While the rule is a mouth-full, one can use existing data to check whether it is being obeyed and, therefore, whether future generations are likely to be treated better or worse than current generations.

Acoustic emission from a growing crack

An analytical method is being developed to determine the signature of an acoustic emission waveform from a growing crack and the results of this analysis are compared to experimentally obtained values. Within the assumptions of linear elastic fracture mechanics, a two dimensional model is developed to examine a semi-infinite crack that, after propagating with a constant velocity, suddenly stops. The analytical model employs an integral equation method for the analysis of problems of dynamic fracture mechanics. The experimental procedure uses an interferometric apparatus that makes very localized absolute measurements with very high fidelity and without acoustically loading the specimen