We derive the addition of velocities in special relativity from the Minkowski’s space-time diagram. We only need to draw some world lines on the diagram, measure the lengths and divide the two lengths ...

We use long-slit spectroscopy along the major axis of a sample of 23 nearby disk galaxies to study the kinematic properties of the ionized-gas component in their inner regions. For each galaxy, we ...

Abstract: A procedure for the construction of the group velocity diagrams for a magnetoionic medium is outlined. Excerpts of results of group velocity diagrams are presented for the purpose of ...

THIS little work, in spite of its ponderous and somewhat ambiguous title, is a useful and workmanlike collection of curves from which may be obtained the value of the mean velocity v in the empirical ...

This paper introduces a method for estimating flutter bifurcation diagrams of systems described by time-domain state-space models. The method estimates the bifurcation diagram by quantifying changes ...

High-resolution R~50 000 long-slit spectroscopy of the inner knots of the highly symmetrical protostellar outflow HH 212 was obtained in the 1-0 S(1) line of H2 at 2.12 micron with a spatial ...