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In this paper we analyze the interaction of blind users with Apple touchscreen devices iPad, iPhone and iPod touch, accessible to the visually-impaired thanks to their pre-installed VoiceOver screen reader or magnifier. Specifically, we focus on the gestures offered by VoiceOver to simplify interaction for blind users. A usability inspection of the devices'(More)
Geometry is a traditionally difficult subject to teach to visually impaired subjects. This paper investigates tools to help blind children learn geometry. An accessible vibro-tactile-based android application has been designed to allow children to make freehand drawings and play with geometry, recognizing common geometric shapes or topological(More)
Visual maps deliver content in a simple and effective way. They can be useful for various purposes in areas such as street guidance, surrounding information, and education. However, sightless persons are unable to explore visual maps and risk being cut off from several multimedia Web applications. In this paper, starting from accessibility issues of(More)
Interaction via mobile devices is a challenge for blind users, who often encounter severe accessibility and usability problems. The main issues are due to the lack of hardware keys, making it difficult to quickly reach an area or activate functions, and to the new way of interacting via touchscreen. A touchscreen has no specific reference points detectable(More)
This study investigates the use of social networks as a scientific tool for gathering medical data from young subjects while promoting healthier habits. Our first hypothesis is that social networks can facilitate epidemiological studies, reducing time and cost. The second question is whether social networks can enable the collection of data from young and(More)
Nowadays Web 2.0 applications allow anyone to create, share and edit on-line content, but accessibility and usability issues still exist. For instance, Wikipedia presents many difficulties for blind users, especially when they want to write or edit articles. In a previous stage of our study we proposed and discussed how to apply the W3C ARIA suite to(More)
A key feature of Web 2.0 is the possibility of sharing, creating and editing on-line content. This approach is increasingly used in learning environments to favor interaction and cooperation among students. These functions should be accessible as well as easy to use for all participants. Unfortunately accessibility and usability issues still exist for Web(More)
The evolution of the Information and Communication Technology (ICT) and the rapid growth of the Internet have impelled the pervasive diffusion of e-Learning systems. This is a great opportunity for visually-disabled people provided that both the interactive environment, created by the Learning Management Systems, and the Learning Objects, created by(More)
Social interaction is important for everyone, and vital for the differently-abled and elderly. Social network applications are causing us to change our ways of communicating and working. We can now make friends all over the world, share ideas and knowledge, search for others' opinions, and more. Facebook and Twitter are examples of these applications.(More)
In recent years podcasting has been in great demand as a recreation and a learning tool. In this paper we describe the design and implementation of a system for automatically converting documents to structured audio. Our prototype is a Web-based service for preparing structured audio material to download on portable mp3 players. The on-line service is(More)