Propagation of mesons in asymmetric nuclear matter in a density dependent coupling model

We study the propagation of the light mesons sigma, omega, rho, and a0(980) in dense hadronic matter in an extended derivative scalar coupling model. Within the scheme proposed it is possible to unambiguously define effective density-dependent couplings at the Lagrangian level. We first apply the model to study asymmetric nuclear matter with fixed isospin asymmetry, and then we pay particular attention to hypermatter in beta-equilibrium. The equation of state and the potential contribution to the symmetry coefficient arising from the mean field approximation are investigated.Comment: 17 pages, 15 PostScript figure

Illegal drug trade in Russia : a research project commissioned by the United Nations Office for Drug Control and Crime Prevention

This volume constitutes the first large-scale empirical analysis of illegal drug trade in post-Soviet Russia. It presents the findings of a research project, which was commissioned by the UN Office for Drug Control and Crime Prevention. Under the coordination of Letizia Paoli, field research was conducted by Russian scientists and outreach workers in nine cities, including Moscow and St. Petersburg. In cooperation with Russian authorities, the author additionally analysed a wide sample of drug-related judicial verdicts and intelligence documents, which were up until now inaccessible to scholars. The results of the project both prove and correct some 'major' theses about illegal drugs in Russia. There is no doubt that the country is experiencing an escalation of illegal drug consumption and trade, which is fostered by a deep social, political and economic crisis. However, contrary to the assumptions of most Russian and Western observers alike, the production, smuggling and sale of illegal drugs are not dominated so far by large-scale criminal organisations. Instead of a few mafia-type cartels, the trade in illegal drugs is carried out by a myriad of small groups, clans, gangs and individuals, who are independent of one another. This report does not merely pursue academic goals, but aims to provide Russian and international policy-makers with first-hand information on the growth of drug trafficking and use in Russia, in order to help them formulate realistic and effective policies

State and parameter estimation approach to monitoring AGR nuclear core

This work concerns with the problem of monitoring an Advanced Gas-cooled Nuclear Reactor (AGR) core. This plant (figure 1) makes use of the heat given by the nuclear efficient reaction to produce electricity by means of steam turbines. These are driven by steam, which is heated, from the AGR gas using a heat exchanger. One of the advantages of a gas cooled reactor is the high temperature that the gas can achieve so that when it is used in conjunction with the heat exchanger and steamed turbine the thermal efficiency is very high