Revista complutense de educación

Resumen basado en el de la publicaciónEn el siglo XX, dentro del campo de la formación del profesorado está emergiendo un modelo de actuación que aplica la visión constructivista sobre la génesis del conocimiento al desarrollo de actividades de perfeccionamiento. Desde la perspectiva, en el Seminario de Ciencias Experimentales que forma parte del programa de centros de la provincia de Madrid, se ha diseñado unas sesiones de trabajo centradas en el tratamiento de problemas relacionados con la enseñanza de las ciencias que, planteados en forma de preguntas, han de ser sometidas a análisis y debate. En lo que respecta a la evaluación, se decantó por un modelo procesual, en el cual el análisis de las sesiones retroalimenta el programa inicial.ES

Cosmic Ray Rejection and Readout Efficiency for Large-Area Arrays

We present an algorithm to optimally process uniformly sampled array image data obtained with a nondestructive readout. The algorithm discards full wells, removes cosmic ray (particle) hits and other glitches, and makes a nearly optimum estimate of the signal on each pixel. The algorithm also compresses the data. The computer requirements are modest, and the results are robust. The results are shown and compared to results of Fowler sampled and processed data. Non-ideal detector performance may require some additional code, but this is not expected to cost much processing time. Known types of detector faults are addressed.Comment: This paper has been accepted for publication in the PAS

IVOA Recommendation: IVOA Astronomical Data Query Language Version 2.00

This document describes the Astronomical Data Query Language (ADQL). ADQL has been developed based on SQL92. This document describes the subset of the SQL grammar supported by ADQL. Special restrictions and extensions to SQL92 have been defined in order to support generic and astronomy specific operations

What Hubble really meant by late and early type: simply more or less complex in appearance

It is widely written and believed that Edwin Hubble introduced the terms `early' and `late types' to suggest an evolutionary sequence for galaxies. This is incorrect. Hubble took these terms from spectral classification of stars to signify a sequence related to complexity of appearance, albeit based on images rather than spectra. The temporal connotations of the terms had been abandoned prior to his 1926 paper on classification of galaxies.Comment: 3 pages, 2 figures, using MNRAS style file; to appear in different style in RAS journal Astronomy & Geophysics (A&G), scheduled for October 2008 issue, A&G journal page is at http://www.blackwellpublishing.com/journal.asp?ref=1366-878