1 Introduction " Before there were computers, we could distinguish persons from non-persons on the basis of an ability to participate in conversations. But now, we have hybrids operating between person and non persons with whom we can talk in ordinary language. " (Colby 1999). Human machine conversation as a technology integrates different areas where the core is language, and the computational...

STEP-NC (ISO 14649) is becoming a promising standard to replace or supplement the conventional G-code programs based on ISO 6983 due to its feature based machine independent characteristics and its centric role to enable efficient CAD/CAM/CNC interoperability. The re-use of Gcode programs is important for both manufacturing and capitalization of machining knowledge, nevertheless the conversion ...

We consider positive solutions of the Dirichlet problem u′′(x) + λf(u(x)) = 0 in (−1, 1), u(−1) = u(1) = 0. depending on a positive parameter λ. We use two formulas derived in [18] to compute all solutions u where a turn may occur and to compute the direction of the turn. As an application, we consider quintic a polynomial f(u) with positive and distinct roots. For such quintic polynomials we c...