A non-main-sequence secondary in SY Cancri

A Main Sequence for Quasars

1 INAF, Osservatorio Astronomico di Padova, Padua, Italy, 2 Instituto de Astronomía, Universidad Nacional Autonoma de Mexico, Mexico City, Mexico, 3 Instituto de Astrofísica de Andalucía (CSIC), Granada, Spain, 4 Dipartimento di Fisica e Astronomia “Galileo Galilei”, Università di Padova, Padova, Italy, 5 Belgrade Astronomical Observatory, Belgrade, Serbia, 6 INAF, Osservatorio di Astrofisica e...

features of short story in translated and non-translated literature: a polysystemic perspective

ترجمه متون ادبی در دنیای امروز از اهمیت ویژه ای برخوردار است. فرهنگ های مختلف با استفاده از متون ادبی ملل و فرهنگ های دیگر سعی در غنی کردن فرهنگ و ادبیات کشور خود دارند. کشور ما نیز از این قاعده مستثنی نیست. در ایران، ترجمه متون ادبی اروپائی که با دوران مشروطه ایرانی آغاز می شود موجب تغییرات اساسی در فرهنگ، شیوه زندگی و تفکر ایرانیان شده است. در این دوران نه تنها در امورات سیاسی و فکری کشور تغی...

Activity Cycles in Lower Main Sequence and Post Main Sequence Stars: the Hk Project

A reflective of sy s

We consider the problem of building an automated proof system for reasoning in contexts. Towards that goal, we first define a language of contextual implications, and give its operational semantics under the form of a natural deduction system using explicit context assertions. We show that this proof system has an equivalent straightforward logic program, which in turn can be reified, i.e. defi...

Revisiting the Blazar Main Sequence

A discussion of the FSRQ – BL Lac unification. All distinctive features marking these two Blazar subclasses find an unifying explanation if the sources are powered by central engines constituted by similar Kerr holes, but fueled at high and low accretion rates, respectively. The connection need not be a genetic one, but evidence toward some FSRQs switching into BL Lacs at lower z will be provid...