Exact scaling functions for one-dimensional stationary KPZ growth

We determine the stationary two-point correlation function of the one-dimensional KPZ equation through the scaling limit of a solvable microscopic model, the polynuclear growth model. The equivalence to a directed polymer problem with specific boundary conditions allows one to express the corresponding scaling function in terms of the solution to a Riemann-Hilbert problem related to the Painleve II equation. We solve these equations numerically with very high precision and compare our, up to numerical rounding exact, result with the prediction of Colaiori and Moore [1] obtained from the mode coupling approximation.Comment: 24 pages, 6 figures, replaced with revised versio

Lowest energy states in nonrelativistic QED: atoms and ions in motion

Within the framework of nonrelativisitic quantum electrodynamics we consider a single nucleus and $N$ electrons coupled to the radiation field. Since the total momentum $P$ is conserved, the Hamiltonian $H$ admits a fiber decomposition with respect to $P$ with fiber Hamiltonian $H(P)$. A stable atom, resp. ion, means that the fiber Hamiltonian $H(P)$ has an eigenvalue at the bottom of its spectrum. We establish the existence of a ground state for $H(P)$ under (i) an explicit bound on $P$, (ii) a binding condition, and (iii) an energy inequality. The binding condition is proven to hold for a heavy nucleus and the energy inequality for spinless electrons.Comment: 46 page

Innovations in Supervision Reducing Violence and Recidivism Through VRP Aftercare and CBI Open Groups

Nebraska Division of Parole Supervision has created a violence-reduction (VRP) aftercare program and a CBI intervention which maintains an open group structure to effectively reduce the recidivism rate of high-risk parole clients, particularly those who have been identified as likely to reoffend violently and those who have previously failed on community supervision. Long-term goals are to ensure 1) the highest risk parole clients receive a higher dosage of evidence-based interventions, 2) the reduced use of parole sanctions and revocations and 3) a reduced overall recidivism rate for parole clients. The ‘open’ nature of the programs (i.e., clients can begin at any session, rather than periodically as a cohort) facilitates the ability of a smaller parole agency with traditionally fewer resources to provide evidence-based, recidivism reduction programs with fidelity

Time Evolution of Spin Waves

A rigorous derivation of macroscopic spin-wave equations is demonstrated. We introduce a macroscopic mean-field limit and derive the so-called Landau-Lifshitz equations for spin waves. We first discuss the ferromagnetic Heisenberg model at T=0 and finally extend our analysis to general spin hamiltonians for the same class of ferromagnetic ground states.Comment: 4 pages, to appear in PR

Responding to Crossover Youth: A Look Beyond Recidivism Outcomes

Crossover youth are involved in both child welfare and juvenile justice systems. The Crossover Youth Practice Model (CYPM) promotes collaboration between these systems to inform decision making between the two agencies and better serve these youth. Yet, few outcome evaluations of the CYPM exist, especially those that assess outcomes beyond recidivism, such as case dispositions, case closure, or placement or living situations. This study examined whether the CYPM (n = 210) decreased recidivism and increased system/case responses and positive outcomes among youth within 9–18 months after the youth’s initial arrest relative to a comparison group of crossover youth (n = 425) who were arrested 1 year before the CYPM was implemented. Overall, the findings suggest that the CYPM in the jurisdiction under study dismisses or diverts crossover youth more often, closes delinquency cases more often, and leads to more home placements than was previously done in the jurisdiction, but it does not significantly reduce recidivism

Kramers degeneracy theorem in nonrelativistic QED

Degeneracy of the eigenvalues of the Pauli-Fierz Hamiltonian with spin 1/2 is proven by the Kramers degeneracy theorem. The Pauli-Fierz Hamiltonian at fixed total momentum is also investigated.Comment: LaTex, 11 page

\u3ci\u3eFamilies, Crime and Criminal Justice: Charting the Linkages\u3c/i\u3e

Contemporary Perspectives in Family Research is a series of volumes that features scholarly work on the frontiers of interdisciplinary research on families and family life. Volume 2, Families, Crime and Criminal Justice reflects this pioneering orientation by bringing together new empirical research that examines the various ways that families intersect with and are affected by crime and the criminal justice system. The interdisciplinary nature of the volume is reflected in the diversity of disciplines represented, including developmental psychopathology, criminology, sociology, family studies, psychology, social work and demography. The inclusion of qualitative studies based upon observational techniques and in-depth, long interviews as well as quantitative work using demographic and survey approaches demonstrates the wide methodological range employed by the authors. The topics examined include the involvement of children in crime, the patterns and impact of violence in the home, the impact of criminal involvement on parenting strategies and youth development, the experience of families of victims and perpetrators, and responses of the criminal justice system to the needs of families