Michal Polasik

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Over recent years, interest has been growing in Bitcoin, an innovation which has the potential to play an important role in e-commerce and beyond. The aim of our paper is to provide a comprehensive empirical study of the payment and investment features of Bitcoin and their implications for the conduct of ecommerce. Since network externality theory suggests(More)
The work deals with an analysis of factors influencing the acceptance of the seven major payment methods (i.e. cash on delivery, online payment integrator, card payment, bank transfer, pay-by-link, virtual payment provider, and payment in person) by the Polish online shops. Our research was based on empirical data obtained through surveys interviews with(More)
Close to an x-ray filter's K-edge the transmission depends strongly on the photon energy. For a few atom pairs, the K-edge of one is only a few tens of eV higher than a K-line energy of another, so that a small change in the line's energy becomes a measurable change in intensity behind such a matching filter. Lutetium's K-edge is ≃27 eV above iridium's(More)
J. Rzadkiewicz, O. Rosmej, A. Blazevic, S. Hagmann, V.P. Efremov, A. Gojska, D.H.H. Hoffmann, S. Korostiy, M. Polasik, K. Slabkowska, A.E. Volkov 1The Andrzej Soltan Institute for Nuclear Studies, Poland; GSI, Darmstadt, Germany; Institute for High Energy Density, Moscow, Russia ; 4 Faculty of Chemistry, Nicholas Copernicus University, Poland; 5 Russian(More)
We propose a novel approach for the theoretical analysis of the photoinduced high-resolution K(h)α(1,2) x-ray hypersatellite spectra, which allows us to obtain reliable values of lifetimes of the doubly K-shell ionized states and fundamental information about the relative role of K-shell double photoionization (DPI) mechanisms. It is demonstrated for the(More)
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