BACKGROUND Comprehensive school-based physical activity programs consist of physical education and other physical activity opportunities including recess and other physical activity breaks, intramurals, interscholastic sports, and walk and bike to school initiatives. This article describes the characteristics of school physical education and physical activity policies and programs in the United...

This talk reports on work aimed at improving our understanding of charged states in gauge theories. Emphasis is placed on different ways of implementing the gauge invariance of physical states. QED perturbative calculations are used to stress that gauge invariance is not enough: only a subset of such states have a direct physical significance. In QCD a non-perturbative obstruction means that qu...

Using a reasonable but simple model, properties of 2+ states in 12Be and 12O are calculated and compared with results of experiments. Disciplines Physical Sciences and Mathematics | Physics Comments Suggested Citation: H.T. Fortune and R. Sherr. (2011). Structure of 2+, t = 2 states in A = 12 Nuclei. Physical Review C 83, 044313. © 2011 The American Physical Society http://dx.doi.org/10.1103/Ph...

We have calculated energies of the first two excited states of 19Mg by using a model that was previously successful for the ground state. Computed excitation energies are 1.12 and 1.54 MeV for (3/2−) and (5/2−), respectively—somewhat in disagreement with values of 1.38 and 2.14 MeV from a recent experiment. Disciplines Physical Sciences and Mathematics | Physics Comments Fortune, H. T. & Sherr,...

A self or person does not appear to be identifiable with his or her organic body, nor with any part of it, such as the brain; and yet selves seem to be agents, capable of bringing about physical events (such as bodily movements) as causal consequences of certain of their conscious mental states. How is this possible in a universe in which, it appears, every physical event has a sufficient cause...

The loop approach to quantum gravity [1] based on the Ashtekar variables [2] has been successful in establishing a consistent and physically reasonable framework for the mathematical description of quantum spacetime [3]. This framework has provided intriguing results on the quantum properties of space, most notably detailed quantitative results on the discrete quanta of the geometry [4]. The no...

Physical states in canonically quantized, finite, 4 dimensional quantum gravity. Minisuperspace Asktekar–Klein–Gordon model. Abstract This is the second paper in a series outlining an algorithm to consistently quantize four dimensional gravity in Ashtekar variables. We put to use the machinery and techniques developed in the first paper for a simple example in minisuperspace, highlighting the s...