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Search: authors:"Iain MacLaren"

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Conceptualising OEP: A review of theoretical and empirical literature in Open Educational Practices

Conceptualisations of open educational practices (OEP) vary widely, ranging from those centred primarily on the creation and use of open educational resources (OER) to broader definitions of OEP, inclusive of but not necessarily focused on OER. The latter, referred to in this paper as expansive definitions of OEP, encompass open content but also allow for multiple entry points to...

Spectral energy distributions of galaxies in high-redshift clusters – III. Abell 370 at z = 0.37

We have imaged the distant cluster Abell 370 (z=0.37) with a CCD-based intermediate pass-band multicolour system defined in earlier papers in this series. Our technique is to use such colours to classify faint galaxies in redshift and spectral class without recourse to spectroscopic data. We demonstrate from a new comparison of ∼80 spectra gathered in five clusters at high...

A uniformly selected catalogue of distant galaxy clusters

We present a new catalogue of faint southern galaxy clusters identified from examination of high-contrast film derivatives of a set of 55 prime focus AAT photographic plates taken in one or both of two pass-bands $(J\equiv {b}_{J}\,\text{and}\,F\equiv {r}_{F}).$. Visual scans of these films have been compared with machine measurements of the original plates and the results...

Spectral energy distributions for galaxies in high-redshift clusters – II. 0016 + 16 at z = 0.54

We have imaged the distant cluster 0016+ 16 (z =0.54) through six intermediate-bandwidth filters ranging in wavelength from 418 to 862 nm, maintaining a photometric precision of 10 per cent to a limiting magnitude of F=22. We find the field-subtracted colour distributions are not compatible with a single uniformly red population of early-type members at z =0.54. A significant...