Fluctuations from Thermalization at RHIC

The centrality dependence of dynamic fluctuations of the transverse momentum and the net charge can signal the approach to local thermal equilibrium in nuclear collisions. I explore this signal by comparing transport-theory calculations to STAR and PHENIX data at a range of energies. In particular, I find that this model can describe PHENIX data on the dependence of fluctuations on the transverse momentum range in which they are measured.Comment: 6 pages, 5 eps figures, Talk given at the 20th Winter Workshop on Nuclear Dynamics, Trelawny Beach, Jamaica, 15-20 March 200

Delivering on Open Government: The Obama Administration's Unfinished Legacy

This report examines progress made during President Obama's first term toward open government goals outlined in a comprehensive set of recommendations that the open government community issued in November 2008, titled Moving Toward a 21st Century Right-to-Know Agenda. We examine activity in the three main areas of the 2008 report: creating an environment within government that is supportive of transparency, improving public use of government information, and reducing the secrecy related to national security issues

Freedom of Information Act Performance, 2012: Agencies Are Processing More Requests but Redacting More Often

A building block of American democracy is the idea that citizens have a right to information about how their government works and what it does in their name. However, citizen access to public information was only established by law in 1966 with the passage of the Freedom of Information Act (FOIA). The law has since been strengthened and improved over the years, and FOIA currently requires federal agencies to formally respond to requests for information within 20 working days or potentially face a lawsuit. While there are exemptions that agencies can use to avoid the disclosure of sensitive information or information that violates privacy rights, agencies processed over half a million FOIA requests in 2012. In about 41 percent of these cases, the information requested was released "in full" with no parts "redacted" -- i.e., clean, complete documents with no blacked-out parts were provided to the person who requested the information. How does this compare to past years and past administrations? How well has President Obama met his goal of being the most transparent administration in history with regard to access to public information? This report examines the processing of FOIA requests from 25 major federal agencies in 2012 and reviews the processing of FOIA requests by agencies since 1998

The Glasma and the Hard Ridge

Correlation measurements indicate that excess two particle correlations extend over causally disconnected rapidity ranges. Although, this enhancement is broad in relative rapidity $\eta=\eta_1 - \eta_2$, it is focused in a narrow region in relative azimuthal angle $\phi=\phi_1 - \phi_2$. The resulting structure looks like a ridge centered at $\eta = \phi=0$. Similar ridge structures are observed in correlations of particles associated with a jet trigger (the hard ridge) and in correlations without a trigger (the soft ridge). The long range rapidity behavior requires that the correlation originates in the earliest stage of the collision, and probes properties of the production mechanism. Glasma initial conditions as predicted by the theory of Color Glass Condensate and provide a and early stage correlation that naturally extends far in rapidity. We have previously shown that the soft ridge is a consequence of particles forming from an initial Glasma phase that experience a later stage transverse flow. We extend this work to study the ridge dependence on the $p_t$ of the correlated pairs. We then determine the soft contribution to the hard ridge.Comment: Proceeding of the APS meeting of the Division of Particles and Fields 2009, Detroit, Mi. Also see arXiv:0910.359

Flow Fluctuations from Early-Time Correlations in Nuclear Collisions

We propose that flow fluctuations have the same origin as transverse momentum fluctuations. The common source of these fluctuations is the spatially inhomogeneous initial state that drives hydrodynamic flow. Longitudinal correlations from an early Glasma stage followed by hydrodynamic flow quantitatively account for many features of multiplicity and $p_t$ fluctuation data. We develop a framework for studying flow and its fluctuations in this picture. We then compute elliptic and triangular flow fluctuations, and study their connections to the ridge