Astrophysics in 1994

Astrophysics.

Using the oscillation frequencies of α Cen A recently discovered by Bouchy & Carrier (2001, 2002), the available astrometric, photometric and spectroscopic data, we tried to improve the calibration of the visual binary system α Cen. With the revisited masses of Pour-baix et al. (2002) we do not succeed to obtain a solution satisfying all the seismic observational constraints. Relaxing the const...

Generating Process Explanations in Nuclear Astrophysics Generating Explanations in Astrophysics

In this paper we describe ASTRA, a computational aid for generating process explanations in nuclear astrophysics. The system operates in two stages, the rst using knowledge of quantum theory to produce a set of legal reactions among elements and the second searching for pathways of such reactions that explain the evolution of some element in terms of lighter ones. ASTRA has found apparently nov...

Astrophysics.

ASTROPHYSICS The NASA Astrophysics Data System : Overview

The NASA Astrophysics Data System Abstract Service has become a key component of astronomical research. It provides bibliographic information daily, or near daily, to a majority of astronomical researchers worldwide. We describe the history of the development of the system and its current status. Urania (Boyce 1996), and the ADS role in the emerging electronic astronomical data environment are ...

Youth Trend Factors addiction to Drugs in Karaj in 1994

The youth trend factors addiction to drugs was the purpose of this research. In the other words, it is attempted to answer to essential question what factors are caused to the addiction in the youth? To reach to answer the above question, it is used mainly from four theoretical perspectives namely anomaly theory, isolationism theory, labeling theory and Sutherland learning theory. The independe...