Platelet Collapse Model of Pulsar Glitches

A platelet collapse model of starquakes is introduced. It displays self-organized criticality with a robust power-law behavior. The simulations indicate a near-constant exponent, whenever scaling is present.Comment: Figures available by sending request to Ivan Schmidt: [email protected]

Electromagnetic Pulse from Final Gravitational Stellar Collapse

We employ an effective gravitational stellar final collapse model which contains the relevant physics involved in this complex phenomena: spherical radical infall in the Schwarzschild metric of the homogeneous core of an advanced star, giant magnetic dipole moment, magnetohydrodynamic material response and realistic equations of state (EOS). The electromagnetic pulse is computed both for medium size cores undergoing hydrodynamic bounce and large size cores undergoing black hole formation. We clearly show that there must exist two classes of neutron stars, separated by maximum allowable masses: those that collapsed as solitary stars (dynamical mass limit) and those that collapsed in binary systems allowing mass accretion (static neutron star mass). Our results show that the electromagnetic pulse spectrum associated with black hole formation is a universal signature, independent of the nuclear EOS. Our results also predict that there must exist black holes whose masses are less than the static neutron star stability limit.Comment: 9 pages, 8 figures, to be published in Astronomy and Astrophysic

Outcome Measurement in Nonprofit Organizations: Current Practices and Recommendations

This report provides a view of the state of outcome measurement as implemented in a number of private nonprofit service organizations engaged in outcome measurement. It provides examples of procedures that some organizations have been able to implement and use for outcome measurement.For this effort, we selected a sample of organizations that responded to INDEPENDENT SECTOR's 1998 Measures Survey, specifically those that reported collecting outcome information on a regular basis. Our sample included only nonprofit organizations that provided services directly to clients (end services), not those whose primary function was to provide services to other organizations. We included organizations that provided human services (including vocational rehabilitation, employment training, youth services, housing and homeless services, and meals/nutrition programs) and health and mental health services (excluding hospitals), as well as environmental and animal protection organizations. We conducted telephone interviews with, and reviewed documents from, thirty-six organizations

Making a Business Case for Reducing Racial and Ethnic Disparities in Health Care: Key Issues and Observations

Offers lessons from RWJF's Finding Answers program around issues involved in laying out financial reasons for providers, caregivers, and others to adopt ongoing, effective interventions to improve quality of care for minority patients

Magnetoresistance and efficiency measurements of Alq(3)-based OLEDs

Copyright 2007 by the American Physical Society. Article is available at

The Times and the revolutionary crisis of 1848

The thesis seeks to examine how The Times functioned within mid-nineteenth-century British society and to suggest how the newspaper can be used to read the history of the period from the perspective of the dominant elements within it. It begins by analysing the uses made of the newspaper by historians and questions the assumptions which lie behind them. Chapters 2 and 3 assess the dominant role of The Times within the newspaper press and explore the relationship between the newspaper and its readers and their mutual perceptions. Chapter 4 analyses the structure of contemporary society and the common values which lay within, while the following chapter indicates the extent to which The Times in its treatment of the French revolution of 1848 constructed its version of reality within those values and thereby defined and defended them. Chapter 6 completes the location of the newspaper by considering the extent to which it was independent of Government, yet dependent on individual politicians. The locating of The Times within contemporary society enables its treatment of the crisis of 1848 to be critically examined in chapters 7 and 8. This reveals the extent to which events in London and Ireland were associated together and perceived as parts of a revolutionary movement which encapsulated the basic fears of the possessing classes and threatened their vital interests. In defending those interests The Times was at its most potent and 1848 demonstrated the ability of the paper to orchestrate and direct opinion on specific issues. The role of The Times and its importance are evaluated by means of the perceptions contemporaries had of events, the way they reacted to them, and the judgements subsequently made by historians. The thesis emphasizes the importance of The Times both as an agent within society and a source for the study of it