We study the old problem of the uniqueness of chemical evolution models by analyzing a set of multiphase models for the galaxy NGC 4303 computed for a variety of plausible physical input parameters. We showed in Mollá et al. (1999) that multiphase chemical evolution models for the three Virgo cluster galaxies NGC 4303, NGC 4321 and NGC 4535, were able to reproduce the observed radial distributi...

The stock price process in China is full of uncertainty hence the indices were introduced to serve as indicators financial market. How capture statistical characteristics Chinese returns by method parametric distributions fitting could be useful fields econometrics and risk management. In this paper, we use a wider range model four main indices. We find generalization Student’s t distribution s...

The Spanish methods to improve timeliness in the industrial production indices are presented in this paper. They fit into a more general program carried out for all the industrial statistics produced by the National Statistical Institute of Spain. The target of the program is to reduce publication dates without any loss of accuracy. The implementation of the program is a direct consequence of t...

Despite the ubiquity of XML, research in metrics for XML documents is scarce. This paper proposes and discusses eleven metrics to measure the quality and complexity of XML Schema and conforming XML documents. To provide an easy view of these metrics, two composite indices have been defined to measure quality and complexity. An open source metric analyzer tool for XML Schema has been developed. ...

We study the old problem of the uniqueness of chemical evolution models. We showed in Mollá et al. (1999) that multiphase models for three Virgo cluster galaxies were able to reproduce the observed radial distributions of spectral indices Mg2 and Fe52. But those models may fit the present-epoch radial distributions with different star formation histories (Tosi 1996). The two spectral indices ab...

April 17, 2009 Version 1.4.1 Date 2008-09-29 Author Peter Frommolt Maintainer Peter Frommolt Title Inferences for biand trifactorial trial designs Depends mvtnorm,multcomp,lattice,graphics,methods Description This package makes global and multiple inferences for given biand trifactorial clinical trial designs using bootstrap methods and a classical approach. Licens...

This study examines whether language-specific input influences children’s nonlinguistic spatial cognition as they acquire their first language. Recent research on infant cognition has shown that preverbal infants can make a distinction between tight-fit and loose-fit containment relations. This distinction is systematically made in Korean (kkita ‘fit tightly’), but not in English (in). Using a ...

We introduce a multi-dimensional generalization of the Euclidean algorithm and show how it is related to digital geometry particularly generation recognition planes. associate with steps geometrical extensions substitutions, i.e., rules that replace faces by unions faces, build finite sets called patterns. examine several their combinatorial, topological properties. This work first step toward ...

introduction: the present study aimed to investigate the psychometric properties of grasha-riechmann student learning styles scale. method: the participants included 1039 students (421 students in human and 618 students in technical sciences), selected through the stratified sampling method from tehran university. they answered the grasha-riechmann student learning style scale and the data was ...