Exploring web data on mobile devices: an approach based on information visualization

Author(s)

Felipe Simões Lage Gomes Duarte

• Document type: Master's Dissertation
• Press: São Carlos.
• Institution: Universidade de São Paulo (USP). Instituto de Ciências Matemáticas e de Computação (ICMC/SB)
• Defense date: 2015-02-12

Examining board members

Fernando Vieira Paulovich; Maria Cristina Ferreira de Oliveira; Paulo Aristarco Pagliosa

• Advisor: Fernando Vieira Paulovich

Abstract

With the development of computers and the increasing popularity of the Internet, our society has entered the information age. This era is marked by the way we produce and deal with information. Everyday, thousand of Gigabytes are stored, but their value is reduced if the data cannot be transformed into knowledge. Concomitantly, computing is moving towards miniaturization and affordability of mobile devices, which are changing users behavior who move from passive readers to content generators. In this context, in this master thesis we propose and develop a data visualization technique, called NMap, and a web data visualization tool for mobile devices, called SPCloud. NMap uses all available visual space to transmit information preserving the metaphor of distance-similarity between elements. Comparative evaluations were performed with the state of the art techniques and the result has shown that NMap produces better results of neighborhood preservation with a significant improvement in processing time. Our results place NMap as a major space-filling technique establishing a new state of the art. SPCloud, a tool which uses NMap to present news available on the web, was developed taking into account the inherent characteristics of mobile devices. Informal user tests revealed that SPCloud performs well to summarize large amounts of news in a small visual space. (AU)

• FAPESP's process: 12/21022-0 - Exploring Web-based Data using Mobile Devices: an Approach Based on Information Visualization
• Grantee: Felipe Simões Lage Gomes Duarte
• Support Opportunities: Scholarships in Brazil - Master