Educational Resources (OER) are being fostered as a global movement for providing educational opportunities to all. However, people with disabilities are still excluded from full participation because of the lack of accessibility of OER websites, as well as of the resources themselves. This work presents a proposal for the design of OER websites that would enable equitable access for all users. This design aims to bridge the accessibility gap through the personalization of the whole OER environment to facilitate an accessible User Experience (UX) based on a user profile that includes the self-identification of disability status. This profile configures not only the "look and feel" of the interface but also the delivery of educational resources suitable for this user profile. To achieve this purpose, the design goes beyond compliance with the ISO/IEC 40500 W3C Web Content Accessibility Guidelines (WCAG) 2.0, since it includes the personalization of the accessible experience through usability considerations and adaptations of educational resources. The delivery of educational resources matches the user's profile with regards to their sensory abilities, cognitive faculties and their requirements of functionality control, display layout, and language. As a proof of concept, we have developed an OER website based on this design and have conducted a set of UX tests that include users with

The number of e-government websites has increased greatly in recent years. Many countries have laws to ensure that e-government sites satisfy web accessibility requirements. The objective of web accessibility is to ensure that people with disabilities can access websites just like everyone else. However, laws that enforce web accessibility do not automatically guarantee compliance: e-government websites are not always prepared to provide a correct service to persons with disabilities. This paper analyses the accessibility of a group of e-government websites of all South American countries and Spain. Three official websites from each country has been analysed: the government, the Parliament and the Senate websites. Different automatic evaluation tools have been used to perform the analysis. The preliminary results of our research show that the majority of e-government websites do not provide adequate levels of web accessibility.

The work presented in this paper is motivated by the acknowledgement that a complete and updated systematic literature review (SLR) that consolidates all the research efforts for Big Data modeling and management is missing. This study answers three research questions. The first question is how the number of published papers about Big Data modeling and management has evolved over time. The second question is whether the research is focused on semi-structured and/or unstructured data and what techniques are applied. Finally, the third question determines what trends and gaps exist according to three key concepts: the data source, the modeling and the database. As result, 36 studies, collected from the most important scientific digital libraries and covering the period between 2010 and 2019, were deemed relevant. Moreover, we present a complete bibliometric analysis in order to provide detailed information about the authors and the publication data in a single document. This SLR reveal very interesting facts. For instance, Entity Relationship and document-oriented are the most researched models at the conceptual and logical abstraction level respectively and MongoDB is the most frequent implementation at the physical. Furthermore, 2.78% studies have proposed approaches oriented to hybrid databases with a real case for structured, semi-structured and unstructured data.

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