On exact solutions for quantum particles with spin S= 0, 1/2, 1 and de Sitter event horizon

Exact wave solutions for particles with spin 0, 1/2 and 1 in the static coordinates of the de Sitter space-time model are examined in detail. Firstly, for a scalar particle, two pairs of linearly independent solutions are specified explicitly: running and standing waves. A known algorithm for calculation of the reflection coefficient $R_{\epsilon j}$ on the background of the de Sitter space-time model is analyzed. It is shown that the determination of R_{\epsilon j} requires an additional constrain on quantum numbers \epsilon \rho / \hbar c >> j, where \rho is a curvature radius. When taken into account of this condition, the R_{\epsilon j} vanishes identically. It is claimed that the calculation of the reflection coefficient R_{\epsilon j} is not required at all because there is no barrier in an effective potential curve on the background of the de Sitter space-time. The same conclusion holds for arbitrary particles with higher spins, it is demonstrated explicitly with the help of exact solutions for electromagnetic and Dirac fields.Comment: 30 pages. This paper is an updated and more comprehensive version of the old paper V.M. Red'kov. On Particle penetrating through de Sitter horizon. Minsk (1991) 22 pages Deposited in VINITI 30.09.91, 3842 - B9

Accuracy and impact of Gartner forecasts on the IT economy

Анализируются прогнозы глобальной исследовательской и консалтинговой фирмы Gartner о развитии стратегических тенденций, которые будут определять мир IT технологий. Оценивается точность прогнозов, их влияние на экономику IT сферы. Сделаны выводы о необходимость учета прогнозов при принятии управленческих бизнес решений. The article analyzes the forecasts of the global research and consulting firm Gartner on the development of strategic trends that will determine the world of IT technologies. The accuracy of forecasts and their impact on the economy of the IT sector are evaluated. Conclusions are drawn about the need to take into account forecasts when making managerial business decisions