Youth Marijuana and Prescription Drug Abuse in Anchorage

Complete issue of Alaska Justice Forum 33(1), Spring 2016 at https://scholarworks.alaska.edu/handle/11122/6883.This article examines results of the Adult Perceptions of Anchorage Youth: 2015 Survey (APAYS) to examine perceptions and concerns of Anchorage adults, both parents and non-parents, about youth marijuana use and youth non-medical use of prescription drugs. A resource list is included.Youth Substance Use / National Data on Youth Access to Substances / The Role of Adults and Parents in Youth Substance Use / About the Survey / Concern about Marijuana and Prescription Drug Use / Relative Safety of Various Substances / Risk of Harm from Marijuana and Prescription Drugs / Consequences of Marijuana and Prescription Drug Use / Youth Access to Prescription Drugs / Conclusion / Definition of Non-Medical Prescription Drug Use (sidebar) / Glossary (sidebar) / Resources (sidebar

Noether-Wald Charges in Critical Gravity

Indexación: Scopus.Critical Gravity theory is defined by a particular combination of quadratic couplings in the curvature added on top of 4D Einstein-Hilbert action with negative cosmological constant. As the Lagrangian is given by a Weyl-squared term, the asymptotic form of the curvature is not modified. The coupling of the W eyl 2 term is such the massive scalar mode is eliminated and the massive spin-2 mode become massless, rendering the theory consistent around the critical point. In the present work, we construct the Noether-Wald charges for the action of Critical Gravity. Such construction makes manifest a defining property of this theory: both the energy and entropy for Einstein black holes vanish identically. © Published under licence by IOP Publishing Ltd.We thank G. Anastasiou, F. Díaz-Martínez and O. Miskovic for helpful discussions. This work was funded in part by FONDECYT Grant 1131075, CONICYT Grant DPI 2014-0115 and UNAB Grants DI-1336-16/RG. D.R.B was financially supported by Facultad de Ciencias Exactas, UNAB, to attend SOCHIFI 2016 Meeting.https://iopscience.iop.org/article/10.1088/1742-6596/1043/1/01202

Energy in higher-derivative gravity via topological regularization

Indexación: Scopus.We give a novel definition of gravitational energy for an arbitrary theory of gravity including quadratic-curvature corrections to Einstein's equations. We focus on the theory in four dimensions, in the presence of a negative cosmological constant, and with asymptotically anti-de Sitter (AdS) boundary conditions. As a first example, we compute the gravitational energy and angular momentum of Schwarzschild-AdS black holes, for which we obtain results consistent with previous computations performed using different methods. However, our method is qualitatively different due to the fact that it is intrinsically nonlinear. It relies on the idea of adding to the gravity action topological invariant terms which suffice to regularize the Noether charges and render the variational problem well-posed. This is an idea that has been previously considered in the case of second-order theories, such as general relativity and which, as shown here, extends to higher-derivative theories. Besides black holes, we consider other solutions such as gravitational waves in AdS, for which we also find results that are in agreement. This enables us to investigate the consistency of this approach in the non-Einstein sector of the theory. © 2018 authors. Published by the American Physical Society.https://journals.aps.org/prd/abstract/10.1103/PhysRevD.98.04404