Maximally extended, explicit and regular coverings of the Schwarzschild - de Sitter vacua in arbitrary dimension

Maximally extended, explicit and regular coverings of the Schwarzschild - de Sitter family of vacua are given, first in spacetime (generalizing a result due to Israel) and then for all dimensions $D$ (assuming a $D-2$ sphere). It is shown that these coordinates offer important advantages over the well known Kruskal - Szekeres procedure.Comment: 12 pages revtex4 5 figures in color. Higher resolution version at http://www.astro.queensu.ca/~lake/regularcoordinates.pd

Role-playing in the elementary school

Thesis (Ed. M.)--Boston University, 1963. Includes bibliographical references (leaves 73-74

Common Law Duty in Negligence Law: The Recent Consolidation of a Consensus on the Expansion of the Analysis of Duty and the New Conservation Liability Limiting Use of Policy Considerations

Without the concept of duty, there is no liability law. Yet, the author demonstrates that although law reviews and other literature contain ample discussion of the legal duty in its various applications, little has been settled with regard the general concept of duty until recently. Professor Lake offers his own account of the concept of duty and offers a 50-state analysis of the general concept of duty, including key decisions that discuss the general concept of duty in negligence law. This article calls upon the American Law Institute to revise the topic of duty to reflect the consensus about its meaning in negligence law now forming among American courts

Rise of Duty and the Fall of In Loco Parentis and Other Protective Tort Doctrines in Higher Education Law, The

The story of twentieth century higher education student safety law\u27 is the gradual application of typical rules of civil liability to institutions of higher education and the decline of insulating doctrines, such as in loco parentis,2 which traditionally protected institutions of higher learning from scrutiny in the legal system. A series of recent events have brought public (and legal) attention to questions about the legal rules governing university responsibility for student injuries.3 In recent times, courts have reversed a long-standing tradition of protecting universities from civil liability for physical injury to students arisin

Thermoelectric properties of Bi2Te3 atomic quintuple thin films

Motivated by recent experimental realizations of quintuple atomic layer films of Bi2Te3,the thermoelectric figure of merit, ZT, of the quintuple layer is calculated and found to increase by a factor of 10 (ZT = 7.2) compared to that of the bulk at room temperature. The large enhancement in ZT results from the change in the distribution of the valence band density of modes brought about by the quantum confinement in the thin film. The theoretical model uses ab initio electronic structure calculations (VASP) with full quantum-mechanical structure relaxation combined with a Landauer formalism for the linear-response transport coefficients.Comment: 4 figures, submitted to AP

Quantum-mechanical wavepacket transport in quantum cascade laser structures

We present a viewpoint of the transport process in quantum cascade laser structures in which spatial transport of charge through the structure is a property of coherent quantum-mechanical wavefunctions. In contrast, scattering processes redistribute particles in energy and momentum but do not directly cause spatial motion of charge.Comment: 6 pages, 5 figures included in tex, to appear in Physical Review