Hadronic model for radio-to-TeV gamma-ray emission from PSR B1259-63

We discuss the implications of the recent X-ray and TeV gamma-ray observations of the PSR B1259-63 system (a young rotation powered pulsar orbiting a Be star) for the theoretical models of interaction of pulsar and stellar winds. We show that previously considered models in which the pulsar wind is purely electron loaded have problems to account for the observed behaviour of the system in the TeV and X-ray bands. We develop a model in which the broad band (radio, X-ray and high energy gamma-ray) emission from the binary system is produced in result of collisions of GeV-TeV energy protons accelerated by the pulsar wind and interacting with the stellar disk. In this model the high energy gamma-rays are produced in the decays of secondary neutral pions, while radio and X-ray emission are synchrotron and inverse Compton emission produced by low-energy (< 100 MeV) electrons from the decays of secondary charged pi mesons. This model can explain not only the observed energy spectra, but also the correlations between TeV, X-ray and radio emission components.Comment: Proceeding of "The multi messenger approach to high energy gamma ray sources", Barcelona, June 200

Quantitative evaluation of scale emergency oil spill in accident on the pipe

Предложена структура системы поддержки принятия решения и набор инструментальных средств для решения задачи оценки масштабов аварийного разлива нефти в рамках системы поддержки принятия решений (СППР).Запропоновано структуру системи підтримки прийняття рішення і набір інструментальних засобів для розв'язання задачі оцінки масштабів аварійного розливу нафти в рамках СППР.The structure of decision support system and a set of tools for solving the problem of evaluating the scale of oil spills in the DSS are proposed