Biogeography deals with the combined analysis of the spatial and temporal components of the evolutionary process. To this purpose, biogeographical analysis should consider two extra steps: a reciprocal illumination step, ...

Bilateral trade is not a spontaneous phenomenon. While individual agents are the ones who initiate and conduct trade transactions, it is nations that define the conditions under which trade occurs. Recent statistical studies ...

The purpose of this paper is twofold. Firstly we investigate the distribution, simplicity and monotonicity of the zeros around the unit circle and real line of the real self-reciprocal polynomials Rn(λ)(z)=1+λ(z+z2+...+zn-1)+zn, ...

A key challenge in multi-electrode transcranial electrical stimulation (TES) or transcranial direct current stimulation (tDCS) is to find a current injection pattern that delivers the necessary current density at a target ...

Trust-repayment behavior is crucial to establish and maintain cooperative links between different (even genetically unrelated) individuals. However, neither the exact nature of this behavior considered mainly as reciprocity, ...

Introduction: The aim of the present work was to evaluate the resistance to flexural fatigue of Reciproc R25 nickel-titanium files, 25 mm, used in continuous rotation motion or reciprocation motion, in dynamic assays device. ...