PASM 2004: Performance models for master/slave parallel programs – p.1/22

We present a model based on an O(3) flavor symmetry and a minimal extension of the scalar sector to induce hierarchical breaking, O(3) → O(2) → SO(2) →nothing. The model naturally accounts for all the known lepton parameters and yields various interesting predictions for others: (i) Neutrinos are nearly degenerate, mν ∼ 0.1 eV; (ii) The solar neutrino problem is solved by the MSW small mixing a...

A diastereoselective ring contraction of the diastereomixture of 2,4-disubstituted 1,3-dioxepins to 2,5-cis-2,3,5-trisubstituted tetrahydrofurans was achieved using TfOH in DMF. The reaction appears to proceed via a chair-like transition state, in which stereomutation of the oxocarbenium occurred, followed by an aldol-type cyclization.

Semantics and Static Interpretation in IMP

The article describes the experience of the master classes for school teachers and university lecturers to use ICT in the educational process. Improving teacher’s/lecturer’s qualification involves their willingness to follow the advanced technology. However, there are several factors that should be considered in the preparation of training courses for teachers. The authors consider the technolo...

S. Ramanujan introduced a technique, known as Ramanujan’s Master Theorem, which provides an analytic expression for the Mellin transform of a function. The main identity of this theorem involves the extrapolation of the sequence of coefficients of the integrand, defined originally as a function on N to C. The history and proof of this result are reviewed. Applications to the evaluation of a var...