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Scientometrics
Authors:
Ana Ramírez
,
Esther García
, and
J. Del Río

Abstract  

Many aspects determine the quality of scientific journals. The impact factor is one of these quantitative parameters. However, the impact factor has a strong dependence on the journal discipline. This dependence forbids a direct comparison between different journals without introducing external considerations. In this paper, a renormalized impact factor, Fr, inspired in the definition of dimensionless physical parameters, is proposed. Fr allows a direct comparison among journals classified into different categories and, furthermore, the time evolution analysis of the journal's role in its field.

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Abstract  

In this contribution we analyze the generating functions for polynomials orthogonal with respect to a symmetric linear functional u, i.e., a linear application in the linear space of polynomials with complex coefficients such that
\documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{upgreek} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} $$u\left( {x^{2n + 1} } \right) = 0$$ \end{document}
. In some cases we can deduce explicitly the expression for the generating function
\documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{upgreek} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} $${\mathcal{P}}\left( {x,w} \right) = \sum\limits_{n = 0}^\infty {c_n P_n \left( x \right)w^n ,}$$ \end{document}
where {Pn}n is the sequence of orthogonal polynomials with respect to u.
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Acta Mathematica Hungarica
Authors:
Daniel Ceretto
,
Esther García
, and
Miguel Gómez Lozano

Abstract

For an arbitrary group G and a G-graded Lie algebra L over a field of characteristic zero we show that the Kostrikin radical of L is graded and coincides with the graded Kostrikin radical of L. As an important tool for our proof we show that the graded Kostrikin radical is the intersection of all graded-strongly prime ideals of L. In particular, graded-nondegenerate Lie algebras are subdirect products of graded-strongly prime Lie algebras.

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Abstract  

This paper analyses the nationalities of the editorial board members of the top 20 journals (according to their impact factor in the ISI Journal Citation Report, Science Edition 2005) serving 15 scientific disciplines. A total of 281 journals were analysed (some journals crossed disciplinary boundaries) and 10,055 of their editorial board members were identified. Some 53% of board members were from the United States. Europe provided 32%, with the United Kingdom making the greatest contribution (9.8%). The analysis of scientific output by nationality in these journals showed a significant correlation, in all disciplines, with the representation of the corresponding nations on the editorial boards. The composition of editorial boards may therefore provide a useful indicator for measuring a country’s international scientific visibility. The present results should be taken into account in the design of national policies with the aim of enhancing the presence of a country’s most prestigious scientists on the editorial boards of the main international journals.

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