Accessibility Evaluation of Turkish E-Commerce Websites

Disabled people encounter many barriers while attempting to access the services on the web. E-commerce websites have been also intensively and widely used. The e-commerce market in Turkey will hit TL 400 billion by 2021. It also evaluates the accessibility of 10 popular Turkish e-commerce websites using five accessibility testing tools, namely Achecker, TAW, Eval Access, MAUVE, and FAE. This research has found that most accessibility guidelines are covered by A checker tool. Navigation, readability, input assistance, and timing are the common found accessibility problems while assessing the accessibility of the targeted websites.

Maintenance Accessibility Evaluation Method based on D-H Model and Comfort in a Virtual Maintenance Environment

In virtual maintenance, the most widely used accessibility evaluation method is to use virtual human reach envelope surface to judge and evaluate accessibility. However, this method can only give two kinds of evaluation results: reachable and unreachable. There is not enough data and theoretical support for the construction of envelope surface, and the precision and accuracy of evaluation need to be improved. In this paper, a parameterized accessibility evaluation method and a method of accessibility envelope surface construction are proposed. Firstly, to objectively describe the movement of human body, a 6-joint and 5-link D-H (Denavit-Hartenberg) link model is established from the waist to the fingertip of the human body, and the ranges of 10 degrees of freedom and angles related to accessibility are determined according to ergonomics. Then, comfort is introduced to refine the accessibility evaluation, and a multi-level accessibility evaluation system based on comfort is constructed according to RULA (the rapid upper limb assessment). In order to facilitate the application of this method in virtual environment, a method of accessibility envelope surface construction is proposed. Firstly, the reachable points are generated by Monte Carlo simulation based on the D-H model. Secondly, the accessibility envelope surface is composed of the outermost random reachable points. Finally, the comparison experiment with the reachable envelope provided by DELMIA in virtual environment shows that the proposed method is more accurate, meticulous and objective. Based on this method, an accessibility evaluation tool has been developed in CATIA and has been applied in some scientific research institutes.

A Declarative Model for Web Accessibility Requirements and its Implementation

The web has become the primary source of information for many people. Many services are provided on the web. Despite extensive guidelines for the accessibility of web pages, many websites are not accessible, making these websites difficult or impossible to use for people with disabilities. Evaluating the accessibility of web pages can either be done manually, which is a very laborious task, or by using automated tools. Unfortunately, the results from different tools are often inconsistent because of the ambiguity of the current guidelines. In this paper, a declarative approach for describing the requirements for accessible web pages is presented. This declarative model can help developers of accessibility evaluation tools to create tools that produce more consistent results and are easier to maintain.