We study the percentage of active, HII and quiescent galaxies with companions in the Palomar survey. We find that when we separate the galaxies by their morphological types (ellipticals or spirals), to avoid morphology-density effects, there is no difference in the percentage of galaxies with companions among the different activity types.

In developing countries it is difficult to have full-time dedicated nurses in Epilepsy Monitoring Units (EMU). Our one-bed EMU is within the Neurology Service and is adequately staffed during daytime working hours only. So we created a new model where the patient's companion was asked to press a nurse call button, allowing the examination of the patient by the nurse. In this study we aimed to u...

Complete census of wide visual companions to nearby G-dwarf stars can be achieved by selecting candidates from the 2MASS Point-Source Catalog and checking their status by secondepoch imaging. Such data are obtained for 124 candidates with separations up to 20, 47 of which are shown to be new physical low-mass stellar companions. A list of visual binaries with G-dwarf primaries is produced by co...

The Kepler mission provides a wealth of multiple transiting planet systems (MTPSs). The formation and evolution of multi-planet systems are likely to be influenced by companion stars given the abundance of multiple stellar systems. We study the influence of stellar companions by measuring the stellar multiplicity rate of MTPSs. We select 138 bright (KP < 13.5) Kepler MTPSs and search for stella...

This paper deals with the design and implementation of AMICO1 , a prototype to enhance mathematics learning by interactions between a student (or a dyad) and virtual agents (several co-learner companions and a mathematician). This work is part of a multidisciplinary project, the project LINGOT that aims to give math teachers tools to improve their teaching. We first present the foundations of t...

We present an analysis of eleven years of precision radial velocity measurements of 76 nearby solar type stars from the Lick radial velocity survey. For each star, we report on variability, periodicity and long term velocity trends. Our sample of stars contains eight known companions with mass (Mp sin i) less than 8 Jupiter masses (MJ ), six of which were discovered at Lick. For the remaining s...

Companion Cognitive Systems is a cognitive architecture inspired by natural intelligent systems. In this paper, we describe seven design goals of Companions, relate them to properties of human reasoning, and discuss their implications. We present our experiences in developing and experimenting with Companions so far, and the challenges that remain.