We provide a summary updated guide for the construction, use and evaluation of leading indicators, and an assessment of the most relevant recent developments in this field of economic forecasting. To begin with, we analyze the problem of selecting a target coincident variable for the leading indicators, which requires coincident indicator selection, construction of composite coincident indexes,...

Knockout reactions using light nuclear targets, e.g., Be or C, have proven in the past to be very useful in gaining information on the wave function of the valence nucleons. However, the strong absorption concentrates the reaction probability at the surface. Similar arguments hold for transfer and Coulomb break-up reactions. Nucleon knockout reactions using protons, on the other hand, allow one...

by a quasi-permutation matrix we mean a square matrix over the complex field c with non-negative integral trace. thus, every permutation matrix over c is a quasipermutation matrix. for a given finite group g, let p(g) denote the minimal degree of a faithful permutation representation of g (or of a faithful representation of g by permutation matrices), let q(g) denote the minimal degree of a fai...

Let us observe that there exists a 2-sorted which is strict and non empty and there exists a 2-sorted which is strict and non quasi-empty. Let us observe that there exists a 2-sorted which is strict, empty, and quasi-empty. We consider ContextStr as extensions of 2-sorted as systems 〈 objects, attributes, an information 〉, where the objects and the attributes constitute sets and the information...