Planning Forum Volume 10

Table of Contents: Graffiti in Urban Space: Incorporating Artists into the Policy Realm /by Sarah Graham (p. 5) -- The Impact of Children's Travel on Household Trip Rates /by Stacey Bricka and Mark Tinkler (p. 33) -- A Marriage of Convenience? Fiscal Incentives and Residential Development Patterns in California /by Richard Brady (p. 47) -- The Visioning Process /by Andy Karvonen (p. 69) -- Global City Blues /reviewed by Oormi Kapadia (p. 87) -- Health and Community Design: The Impact of the Built Environment on Physical Activity /reviewed by Lisa M. Weston (p. 88) -- Building Gotham: Civic Culture and Public Policy in New York City /reviewed by Andy Karvonen (p. 89) -- The Rise of the Creative Class and How It's Transforming Work, Leisure, Community, and Everyday Life, /reviewed by Elizabeth Mclamb (p. 90) -- Professional Reports, Theses, and Dissertations (p. 94) -- News About Graduates (p. 96)Community and Regional Plannin

On the Emergence of Nonextensivity at the Edge of Quantum Chaos

We explore the border between regular and chaotic quantum dynamics, characterized by a power law decrease in the overlap between a state evolved under chaotic dynamics and the same state evolved under a slightly perturbed dynamics. This region corresponds to the edge of chaos for the classical map from which the quantum chaotic dynamics is derived and can be characterized via nonextensive entropy concepts.Comment: Invited paper to appear in "Decoherence and Entropy in Complex Systems", ed. H.T. Elze, Lecture Notes in Physics (Springer, Heidelberg), in press. 13 pages including 6 figures and 1 tabl

A Comprehensive Study of the Radiative Decays of J/ψJ/\psi and ψ(2S)\psi(2S) to Pseudoscalar Meson Pairs, and Search for Glueballs

Using 53 pb$^{-1}$ of $e^+e^-$ annihilation data taken at $\sqrt{s}=3.686$ GeV, a comprehensive study has been made of the radiative decays of samples of 5.1 million $J/\psi$ and 24.5 million $\psi(2S)$ into pairs of pseudoscalar mesons, $\pi^+\pi^-$, $\pi^0\pi^0$, $K^+K^-$, $K_S^0K_S^0$, and $\eta\eta$. Product branching fractions for the radiative decays of $J/\psi$ and $\psi(2S)$ to scalar resonances $f_0(1370,1500,1710,2100, \text{and} 2200)$, and tensor resonances $f_2(1270,1525, \text{and} 2230)$ have been determined, and are discussed in relation to predicted glueballs. For $\psi(2S)$ radiative decays the search for glueballs has been extended to masses between 2.5 GeV and 3.3 GeV.Comment: 21 pages, 14 figures, published in PR