Aristarchus of Samos: The Ancient Copernicus

Abstract Samos Act 2010.dvi

In this paper we consider a risk model with two classes of insurance risks in the presence of multiple thresholds. We assume that the two claim counting processes are, respectively, Poisson and Sparre Andersen with generalized Erlang(2) claim inter-arrival times. We derive an integro-differential system for the Gerber-Shiu functions for surplus-dependent premium rates and a piecewise integro-di...

N. Copernicus Astronomical Center

In our review of the blazar phenomenon, we discuss blazar models, with a focus on the following issues: sub-parsec jets and their environment; energy dissipation and particle acceleration; and radiative processes.

Compositional Characteristics of the Aristarchus Crater from ( M

M3G20090209T054030 and M3G20090209T072710 COMPOSITIONAL CHARACTERISTICS OF THE ARISTARCHUS CRATER FROM (M) DATA. J. F. Mustard, C. M. Pieters, P. J. Isaacson, J. W. Head, R. L. Klima, N. E. Petro, M. Staid, J. M. Sunshine, C. Runyon, L. A. Taylor. Brown University Geological Sciences, Box 1846, Providence, RI 02912, USGS Denver, APL, NASA Goddard, PSI, Univ. of MD, College of Charleston, Univ o...

the effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)

cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...

SAMOS: an Active Object-Oriented Database System