Scaling law and critical exponent for alpha_0 at the 3D Anderson transition

We use high-precision, large system-size wave function data to analyse the scaling properties of the multifractal spectra around the disorder-induced three-dimensional Anderson transition in order to extract the critical exponents of the transition. Using a previously suggested scaling law, we find that the critical exponent is significantly larger than suggested by previous results. We speculate that this discrepancy is due to the use of an oversimplified scaling relation

[Review of] Mario T. Garcfa, Desert Immigrants: The Mexicans of El Paso, 1880- 1920

Mario T. Garcia\u27s Desert Immigrants documents and analyzes the growth of the border city of El Paso, Texas. The transformation of El Paso from a small crossroads community between Mexico and the U.S. to a major commercial and industrial metropolis is presented in terms of the growth of American industrial capitalism and its need for new sources of cheap and manageable labor. Garcia\u27s attention to the economic underpinnings of El Paso\u27s growth is well developed and he integrates many types of historical information. Business and labor statistics, demographic figures and newspaper accounts of day-to-day life in the city show the impact of immigration upon the border town

Finding the divine in challenging conversations

This article was originally published in The Prophet -- a journal created by and for the students at the Boston University School of Theology (BUSTH) to amplify the voices of STH students by promoting and sharing a range of perspectives on matters of concern including, but not limited to, spiritual practices, faith communities and society, the nature of theology, and current affairs. It serves as a platform for STH students to share their academic work, theological reflections, and life experiences with one another and the wider community.This reflection is part of a collection of responses to the theme: "What is Theology?

The puzzling harmonic behavior of the Cathedral QPO in XTE J1859+226

Abridged: We present a spectral and temporal analysis of the Cathedral QPO detected in the power density spectra of the microquasar XTE J1859+226 obtained with RXTE. This type of QPO manifests as two peaks with similar amplitudes and harmonically related centroid frequencies (~3 and ~6 Hz). The amplitude of the ~3 Hz feature varies in anticorrelation with the count rate, by about ~50. The ~6 Hz feature shows a slight increase (~7%) of its amplitude with count rate. The RMS-spectra of the two peaks are quite different. The ~3 Hz feature is softer than the other one, and shows a cut-off at an energy of ~6 keV while the RMS of the 6 Hz increases up to at least 20 keV. We also study the bicoherence, $b^2(\mu,\nu)$. The values b^2(~3,~3) and b^2(~6,~6) are rather high and similar to the type C QPOs of GRS 1915+105. By comparison with the latter source the fact that the bicoherence of the ~3 Hz feature is higher than that of the other peak, would tend to indicate that the ~3 Hz is the fundamental QPO. The value of b^2(~3,~6)$ is, however, low and therefore indicates a behavior that is different than that seen in GRS 1915+105. We suggest that, rather than pure harmonics, we may see different modes of the same underlying phenomenon competing to produce QPOs at different frequencies.Comment: 7 pages, 5 figures, published in ApJ, vol 735, p79 Version corrected for small mistake

Defective Vortex Lattices in Layered Superconductors with Both Point and Correlated Pins

The mixed phase of layered superconductors with no magnetic screening is studied through a partial duality analysis of the corresponding XY model in the presence of random pinning centers. Sufficiently weak Josephson coupling between adjacent layers results in an entangled vortex solid that exhibits weak superconductivity across layers. The corresponding vortex liquid state shows an inverted specific heat anomaly that is a precursor to the weak superconductor.Comment: 11 pages, 2 figures, to appear in the proceedings of the VORTEX III Conference, Crete, September 200