The influence of strong magnetic field on photon-neutrino reactions

The two-photon two-neutrino interaction induced by magnetic field is investigated. In particular the processes $\gamma \gamma \to \nu \bar \nu$ and $\gamma \to \gamma \nu \bar \nu$ are studied in the presence of strong magnetic field. An effective Lagrangian and partial amplitudes of the processes are presented. Neutrino emissivities due to the reactions $\gamma \gamma \to \nu \bar \nu$ and $\gamma \to \gamma \nu \bar \nu$ are calculated taking into account of the photon dispersion and large radiative corrections. A comparison of the results obtained with previous estimations and another inducing mechanisms of the processes under consideration is made.Comment: 16 pages, LATEX, 3 EPS figures, based on the talk presented at XXXI ITEP Winter School of Physics, Moscow, Russia, February 18 - 26, 200

Modeling of a multi-link transport connection by a network of queuing systems

A model of a multi-link homogeneous transport connection with limited buffer storage in transit nodes as a network of queuing systems with discrete time is proposed. An estimate of the lower bound of the capacity of the transport connection throughput is obtained. The effect of a set of successive absolutely reliable data links located between two nondeterministic retransmission sections of a given quality on the operational characteristics of a transport connection is found