We compile a list of 121 RS CVn type stars from the bibliography in southern hemisphere, to search for activity cycles, covering large range luminosities and rotation periods. For each system list, we obtain photometric data All Sky Automated Survey (ASAS), complement it with our own photometry, obtained Optical Robotic Observatory (ORO). analyze this Generalized Lomb-Scargle periodogram determ...

We present multiepoch Very Large Array (VLA) observations at 1.4 GHz, 4.9 GHz, 8.5 GHz and 14.9 GHz for a sample of eight RS CVn binary systems. Circular polarization measurements of these systems are also reported. Most of the fluxes observed are consistent with incoherent emission from mildly relativistic electrons. Several systems show an increase of the degree of circular polarization with ...

Welding costs associated with the laying of pipes for deepwater oil and gas extraction can be reduced using high interpass temperatures (ITs). However, a IT decrease mechanical properties heat-affected zone (HAZ) welded joints. With use strength-toughness steels, this may an acceptable trade-off. Therefore, it is necessary to evaluate influence ITs on HAZ. The coarse-grain HAZ (CGHAZ) intercrit...