RESEARCHES IN STELLAR PARALLAX

Stellar Absolute Magnitudes via the Statistical Parallax Method

I review statistical parallax absolute magnitude determinations which employ data from the Hipparcos satellite for RR Lyrae and Cepheid variables, and for several other stellar classes. Five groups have studied the RR Lyrae stars, and the results are reassuringly consistent: MV (RR) = 0.77 ± 0.13 mag at [Fe/H] = –1.6 dex. Extensive Monte Carlo simulations showed that systematic errors are small...

Relativistic stellar aberration for the Space Interferometry Mission: parallax analysis

This paper is a continuation of our previous analysis (i.e. Turyshev 2002a, 2002b) of the relativistic stellar aberration requirements for the Space Interferometry Mission (SIM). Here we have considered a problem of how the expected astrometric accuracy of parallax determination will constrain the accuracy of the spacecraft navigation. We show that effect of the spacecraft’s navigational errors...

Primitive Parallax and Parallax Primitives

This paper describes an implementation of parallax depth perception designed to be a contributing unit to a distributed perceptual intelligence. The work was done in the context of the Cog project, a large-scale eeort to develop human or at least infant intelligence from the bottom up. Our implementation uses fast-approximation \good enough" region mapping and relevant motion detection over mul...

Recent Researches in Metallurgical

Published Researches in Medical Education in Iran

Introduction. In order to improve planning, educational methodology, and evaluation in medical education, well-proportioned, exact and prospective programs are needed. Without doubt, the main changes in medical education programs have resulted from researches performed in this area during the last decades. Revision of medical education in Iran began by the Cultural Revolution Council by order ...