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Ramtin Attar

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Publications by Ramtin Attar (bibliography)

» 2009 «

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Song, Hyunyoung, Grossman, Tovi, Fitzmaurice, George W., Guimbretiere, Francois, Khan, Azam, Attar, Ramtin and Kurtenbach, Gordon (2009): PenLight: combining a mobile projector and a digital pen for dynamic visual overlay. In: Proceedings of ACM CHI 2009 Conference on Human Factors in Computing Systems 2009. pp. 143-152. Available online

“Digital pen systems, originally designed to digitize annotations made on physical paper, are evolving to permit a wider variety of applications. Although the type and quality of pen feedback (e.g., haptic, audio, and visual) have a huge impact on advancing the digital pen technology, dynamic visual feedback has yet to be fully investigated. In parallel, miniature projectors are an emerging technology with the potential to enhance visual feedback for small mobile computing devices. In this paper we present the PenLight system, which is a testbed to explore the interaction design space and its accompanying interaction techniques in a digital pen embedded with a spatially-aware miniature projector. Using our prototype, that simulates a miniature projection (via a standard video projector), we visually augment paper documents, giving the user immediate access to additional information and computational tools. We also show how virtual ink can be managed in single and multi-user environments to aid collaboration and data management. User evaluation with professional architects indicated promise of our proposed techniques and their potential utility in the paper-intensive domain of architecture.”

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Grossman, Tovi, Fitzmaurice, George W. and Attar, Ramtin (2009): A survey of software learnability: metrics, methodologies and guidelines. In: Proceedings of ACM CHI 2009 Conference on Human Factors in Computing Systems 2009. pp. 649-658. Available online

“It is well-accepted that learnability is an important aspect of usability, yet there is little agreement as to how learnability should be defined, measured, and evaluated. In this paper, we present a survey of the previous definitions, metrics, and evaluation methodologies which have been used for software learnability. Our survey of evaluation methodologies leads us to a new question-suggestion protocol, which, in a user study, was shown to expose a significantly higher number of learnability issues in comparison to a more traditional think-aloud protocol. Based on the issues identified in our study, we present a classification system of learnability issues, and demonstrate how these categories can lead to guidelines for addressing the associated challenges.”

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