BACKGROUND: In response to the rising rate of treatment admissions related to illicit use of amphetamines (eg, methamphetamine), we examined the prevalence of amphetamine use among treatment-seeking, opioid-dependent adults, explored whether amphetamine users were as likely as nonamphetamine users to enroll in opioid-dependence treatment trials, and determined whether amphetamine users manifest...

Dated records of ice-cap growth from Arctic Canada recently suggested that a succession of strong volcanic eruptions forced an abrupt onset of the Little Ice Age between A.D. 1275 and 1300 [Miller GH, et al. (2012) Geophys Res Lett 39(2):L02708, 10.1029/2011GL050168]. Although this idea is supported by simulation experiments with general circulation models, additional support from field data ar...

The theory of scale relativity suggests that, at very large time scales, classical laws should be replaced by a non-deterministic, quantum-like description. The theory gives up individual, localized trajectories, but it yields the probability density of families of virtual trajectories, as deduced from a generalized Schr6dinger equation. In this paper, we compare the system of three planets rec...

Magyarország Kormánya az 1257/2018. (VI. 4.) határozatával a hazafias és honvédelmi nevelésért felel?s kormánybiztost nevezett ki jelen tanulmány szerz?jének személyében. Feladatai között szerepel nevelés kormányzati stratégiájának kidolgozása. A hazafiságra komplex feladatrendszerébe integrálódik. Az alábbiakban közreadott írás hazafiasságra rendszerkörnyezete elemzésének részeként bemutatja k...

We present a new analysis of the dynamics of the planetary system around the pulsar B1257+12. A semi-analytical theory of perturbation between terrestrial-mass planets B and C is developed and applied to improve multi-orbit timing formula for this object. We use numerical simulations of the pulse arrival times for PSR B1257+12 to demonstrate that our new timing model can serve as a toll to dete...