This article examines explanations for both Internet use and non-use by older individuals. Older adults are often considered a homogeneous group with uniform reasons for Internet non-use, or when they are online, practising a uniform range of activities. The study gathered data concerning senior non-users through a national telephone survey. Data concerning senior Internet users were obtained t...

Telling stories is different from reading out text: a speaker reponds to the listener’s feedback and incorporates this into the ongoing talk. However, current computer systems are unable to do this and instead just non-attentively read out a text, disregarding all feedback (or the absence thereof). I propose and discuss an idea for a small research project and a plan for how an attentive listen...

If A is a unital C∗-algebra and if H is a complex Hilbert space, then the set SH(A) of all unital completely positive linear maps from A to the algebra B(H) of continuous linear operators on H is an operator-valued, or generalised, state space of A. The usual state space of A occurs with the one-dimensional Hilbert space C. The structure of the extreme points of generalised state spaces was det...

Completely iterative theories of Calvin Elgot formalize (potentially infinite) computations as solutions of recursive equations. One of the main results of Elgot and his coauthors is that infinite trees form a free completely iterative theory. Their algebraic proof of this result is extremely complicated. We present completely iterative algebras as a new approach to the description of free comp...

Introduction Increase in alpha band is observed when blood perfusion in frontal area of head decreases. The present study evaluated some changes in the alpha band particularly, alpha-1 of frontal and central areas of the head, when several areas were exposed simultaneously to magnetic field. Materials and Methods Five points of head (F3, F4, Cz, T3, and T4) of twenty healthy male participants w...