The use of web accessibility evaluation tools is a widespread practice. Evaluation tools are heavily employed as they help in reducing the burden of identifying accessibility barriers. However, an over-reliance on automated tests often leads to setting aside further testing that entails expert evaluation and user tests. In this paper we empirically show the capabilities of current automated evaluation tools. To do so, we investigate the effectiveness of 6 state-of-the-art tools by analysing their coverage, completeness and correctness with regard to WCAG 2.0 conformance. We corroborate that relying on automated tests alone has negative effects and can have undesirable consequences. Coverage is very narrow as, at most, 50% of the success criteria are covered. Similarly, completeness ranges between 14% and 38%; however, some of the tools that exhibit higher completeness scores produce lower correctness scores (66-71%) due to the fact that catching as many violations as possible can lead to an increase in false positives. Therefore, relying on just automated tests entails that 1 of 2 success criteria will not even be analysed and among those analysed, only 4 out of 10 will be caught at the further risk of generating false positives.

This paper assesses the accessibility of the websites of the National Library of Australia, and those of each of the State/Territory Libraries. The analysis has been conducted using expert manual evaluation, automated tools and users with disabilities to identify both the Web Content Accessibility Guideline (WCAG) Version 2 compliance as well as the chief accessibility barriers identified by users with disabilities. While the results from the different aspects of the hybrid testing methods differ considerably in their ranking, the quantitative data suggest that at the time of writing, none of the libraries assessed meet WCAG 2.0 Level A compliance. Unfortunately, it follows that people with disabilities would have problems accessing materials from the websites of all of the nine libraries tested. In view of the fact that one in five people have a disability that places restrictions on their mobility, employment and/or education, this is understandably significant. Despite the issue of non-compliance, however, many libraries had clearly considered and implemented elements of WCAG 2.0 and would only require minimal improvements to reach the web standard, while others have considerable work to do before they meet the required inclusive website design advocated by both Australian and international standards

For the toric variety X associated to the Bruhat poset of Schubert varieties in a minuscule G/P , we describe the singular locus in terms of the faces of the associated polyhedral cone. We further show that the singular locus is pure of codimension 3 in X, and the generic singularities are of cone type.Let K denote the base field which we assume to be algebraically closed of arbitrary characteristic. Given a distributive lattice L, let X(L) denote the affine variety in A #L whose vanishing ideal is generated by the binomials X τ X ϕ − X τ ∨ϕ X τ ∧ϕ in the polynomial algebra K[X α , α ∈ L] (here, τ ∨ ϕ (respectively τ ∧ ϕ) denotes the join-the smallest element of L greater than both τ, ϕ (respectively the meet-the largest element of L smaller than both τ, ϕ)). These varieties were extensively studied by Hibi in [9] where Hibi proves that X(L) is a normal variety. On the other hand, Eisenbud and Sturmfels show in [5] that a binomial prime ideal is toric (here, "toric ideal" is in the sense of [14]). Thus one obtains that X(L) is a normal toric variety. We shall refer to such a X(L) as a Hibi toric variety.For L being the Bruhat poset of Schubert varieties in a minuscule G/P , it is shown in [7] that X(L) flatly deforms to G/P (the cone over G/P ), i.e., there exists a flat family over A 1 with

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This paper explores the concept of Web accessibility and how technologies, guidelines and policies have evolved since the turn of the twenty-first century in order to address the ideals of equitable access to online content for all people. The paper discusses the high availability of assistive technologies built into consumer devices and the associated accessibility guidelines for Web sites and content. Through examination of the literature, this paper shows that the accessible design and assessment of Web sites can be complicated, and that social media, corporate and government Web sites are yet to fully realise the goals of an accessible Web. The paper concludes with the view that disability awareness, more than technology and policy, is perhaps the primary obstacle to a more universally accessible Web.