In recent years, there has been a growing interest in companion matrices. Sparse matrices are well known: every sparse matrix is equivalent to Hessenberg of particular simple type. Recently, Deaett et al. [Electron. J. Linear Algebra, 35:223--247, 2019] started the systematic study nonsparse They proved that nonderogatory, although not necessarily matrix. this paper, which unit described. matri...

canine ehrlichiosis is a zoonotic rickettsial disease transmitted by ticks. in the present study, 198 companion dogs of different ages were examined for serum antibody detection against ehrlichia canis by means of immunochromatography assay. the dogs were selected among referred cases to veterinary hospital of shahid chamran university of ahvaz, southwestern iran from november 2008 to march 201...

We apply 3D hydrodynamical simulations to study the rotational aspect of gas flow patterns around eccentric companions embedded in an accretion disk its primary host. sample a wide range companion mass ratio q and h, confirm generic transition from prograde (steady tidal interaction dominated) retrograde (background Keplerian shear circum-companion when orbital eccentricity exceeds critical val...

This paper discusses the conditions for the integration of a software companion into a distance training system. The study context is that of Croisières, a device to learn French. The main questions raised when integrating a software companion into such a device can be answered by defining the various roles that the companion plays for the learner, by defining a written dialogue that can be est...

Recurrent flaring events at Xand soft gamma-ray energies have been recently reported for the galactic black hole candidate Cygnus X-1. The observed fluxes during these transient outbursts are far higher than what is observed in “normal” episodes. Here we suggest that the origin of this radiation is non-thermal and produced by inverse Compton interactions between relativistic electrons in the je...