Efficient edge-services for colorblind users
ABSTRACT From his twin perspectives as a career-long telecommunications engineer and Chairman of one of the UK's largest electronics companies, Sir David Brown will reflect on whether and when the New Economy, seemingly so long coming, will finally arrive. He ...
Full-textDOI: · Available from: Gennaro Iaccarino, Aug 20, 2015
- SourceAvailable from: Ilaria Manno
[Show abstract] [Hide abstract]
- "Another direction, given our experience in this field – , is to move toward a system able to improve learning performance of all students, also for students with disabilities. "
ABSTRACT: Student Response Systems exhibit a long usage history, begun with clickers and recently evolved toward Web- based systems. Several studies show that they improve students’ engagement and participation, but also show some drawbacks (clickers costs, distraction and equity in Web-based systems). In this paper, we present our implementation of a Student Response System integrated within a collaborative application. Our approach does not require an Internet connection, has no cost, is ﬂexible, and includes the possibility of arranging a Student Response Systems with a wide set of collaborative tools. We also present an evaluation study involving teachers and students from a high school. Results show improvements in students’ participation and engagement. Finally we found some differences between the teachers and students groups with regard to user experience, usefulness, and long-term behaviors.International Conference on Collaboration Technologies and Systems (CTS 2014); 05/2014
[Show abstract] [Hide abstract]
- "Recoloring methods consider the specific content to map original colors of an image to a different set of colors that alleviate color ambiguities (red-green or blue-yellow) by enhancing contrast that avoids misleading the CVD individual. The recoloring method of Iaccarino et al.  is controlled by user defined parameters, while some other recoloring methods , , ,  try to preserve naturalness in a few user specified key colors. Hence, they often produce variable results, even for the same content, based on the colors/parameters chosen by the users. "
ABSTRACT: Color is one of the most common ways to convey information in visualization applications. Color vision deficiency (CVD) affects approximately 200 million individuals worldwide and considerably degrades their performance in understanding such contents by creating red-green or blue-yellow ambiguities. While several content-specific methods have been proposed to resolve these ambiguities, they cannot achieve this effectively in many situations for contents with a large variety of colors. More importantly, they cannot facilitate color identification. We propose a technique for using patterns to encode color information for individuals with CVD. We present the first content-independent method to overlay patterns on colored visualization contents that not only minimizes ambiguities but also allows color identification. We validated our method with two user studies. Our results show that overlaying patterns significantly improves the performance of dichromats in several color-based visualization tasks, making it almost similar to normal trichromats'. More interestingly, allow normal trichromats to perform with greater accuracy. Finally, using patterns enable the preliminary design of a passive device, like eyeglasses, that can overlay different patterns on the image perceived by a dichromat facilitating color information retrieval. We have built a simple low-cost prototype to demonstrate the feasibility of this design.03/2012; 19(1). DOI:10.1109/TVCG.2012.93
- "Multimedia content must be often adapted to match the characteristics of the mobile device in terms of computational power, rendering capabilities and network connection. However , content adaptation may be driven by specific settings of user preferences: for example, a color-blind user may require specific enhancements on images and videos to match its impaired vision . Adaptation of multimedia resources may involve different transformations. "
Conference Paper: Resource Management Strategies for Mobile Web-Based Services.[Show abstract] [Hide abstract]
ABSTRACT: The great diffusion of Mobile Web-enabled devices allows the implementation of novel personalization, location and adaptation services that will place unprecedented strains on the server infrastructure of the content provider. This paper has a twofold contribution. First, we analyze the five-years trend of Mobile Web-based applications in terms of workload characteristics of the most popular services and their impact on the server infrastructures. As the technological improvements at the server level in the same period of time are insufficient to face the computational requirements of the future Mobile Web-based services, we propose and evaluate adequate resource management strategies. We demonstrate that pre-adaptating a small fraction of the most popular resources can reduce the response time up to one third thus facing the increased computational impact of the future Mobile Web-based services.IEEE International Conference on Wireless and Mobile Computing, Networking and Communications, WiMob 2008, Avignon, France, 12-14 October 2008, Proceedings; 01/2008