Assessment of Web Content Accessibility Levels in Spanish Official Online Education Environments

Diversity-based designing, or the goal of ensuring that web-based information is accessible to as many diverse users as possible, has received growing international acceptance in recent years, with many countries introducing legislation to enforce it. This paper analyses web content accessibility levels in Spanish education portals according to the international guidelines established by the World Wide Web Consortium (W3C) and the Web Accessibility Initiative (WAI). Additionally, it suggests the calculation of an inaccessibility rate as a tool for measuring the degree of non-compliance with WAI Guidelines 2.0 as well as illustrating the significant gap that separates people with disabilities from digital education environments (with a 7.77% average). A total of twenty-one educational web portals with two different web depth levels (42 sampling units) were assessed for this purpose using the automated analysis tool Web Accessibility Test 2.0 (TAW, for its initials in Spanish). The present study reveals a general trend towards non-compliance with the technical accessibility recommendations issued by the W3C-WAI group (97.62% of the websites examined present mistakes in Level A conformance). Furthermore, despite the increasingly high number of legal and regulatory measures about accessibility, their practical application still remains unsatisfactory. A greater level of involvement must be assumed in order to raise awareness and enhance training efforts towards accessibility in the context of collective Information and Communication Technologies (ICTs), since this represents not only a necessity but also an ethical, social, political and legal commitment to be assumed by society.

(Table 1) Radiolarian abundances and preservation in DSDP Hole 96-618 samples

Radiolarians are present in samples from six of the seven Deep Sea Drilling Project Leg 96 sites examined. The age of the siliceous fauna in these samples ranges from late Pleistocene through Holocene, with some Cretaceous radiolarians redeposited in Pleistocene sequences. Radiolarian preservation is discontinuous at these sites except for intraslope basin Site 618, where the sediments throughout the first five cores contain radiolarians.

Bust of Pseudo-Seneca

Peter Paul Rubens; 10 7/16 in.x 6 31/32 in.; pen and brown ink over black chalk heightened with white, with brush and gray ink

Mosque Lamp, from the Suleymaniye Mosque

Pottery, Turkey, Ottoman; 1 ft. 6 31/32 in. x 1 ft. 13/32 in.; glazed fritware, polychrome underglazed painted

Portland Vase, front view

Glass, Roman; 9 41/64 in.x 6 31/32 in.; carved and blown, cameo glass

Portland Vase, diagram of the frieze

Glass, Roman; 9 29/64 in. x 6 31/32 in.

Portland Vase, rear view

Glass, Roman; 9 41/64 in.x 6 31/32 in.; carved and blown, cameo glass

Portland Vase, right side

Glass, Roman; 9 41/64 in.x 6 31/32 in.; carved and blown, cameo glass

Portland Vase, left side

Glass, Roman; 9 41/64 in.x 6 31/32 in.; carved and blown, cameo glass

Iminopropadienones R-N=C=C=C=O and carbon suboxide, C3O2. Theoretical and experimental 13C NMR spectra

The C-13 NMR data of five iminopropadienones R-N=C=C=C=O as well as carbon suboxide, C3O2, have been examined theoretically and experimentally. The best theoretical results were obtained using the GIAO/B3LYP/6-31 +G**//MP2/6-31G* level of theory, which reproduces the chemical shifts of the iminopropadienone substituents extremely well while underestimating those of the cumulenic carbons by 5-10 ppm. The computationally faster GIAO/HF/6-31 + G**//B3LYP/6-31 G* level is also adequate. (C) 2004 Elsevier B.V. All rights reserved.