This paper introduces ProxiScientia, a visualization tool that provides awareness support to developers, as they engage in collaborative software development activities. ProxiScientia leverages streams of fine-grained...
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Mobile phone users in rural parts of the developing world, especially Africa, adapt to lack of electricity, poverty, remote locations, unpredictable services, and second-hand technology. Meanwhile, the technology deve...
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Instant messaging systems, such as Skype, offer text, audio and video channels for one-on-one and group conversations, both for personal and professional communication. They are commonly used at a distance, i.e., acro...
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What, if any, are the effects of the changes in distributed systems behavior on the social dynamics of distributed groups? The rapid evolution of cloud infrastructures, portable devices and multimedia services has ena...
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What, if any, are the effects of the changes in distributed systems behavior on the social dynamics of distributed groups? The rapid evolution of cloud infrastructures, portable devices and multimedia services has enabled cooperation among strangers in online environments that lack quality of service guarantees. Group members experience delays and inconsistencies in the shared state. Previous research on delays focuses on tightly-coupled tasks and assumes that individual and group interests are aligned. In reality, individual participation in a group depends on how a participant weighs the value and the cost of cooperation. That tension is well captured in mixed-motive tasks (e.g., a social trap). A study was conducted, where 15 groups performed a loosely-coupled task that simulates social traps. Group members experienced a gradual degradation of system performance in the form of complex delays. Groups exhibited different adaptation patterns to the changes in the system behavior. There is no guarantee that group adaptation will always keep the status quo. System interventions are needed to maintain group dynamics.
We argue for a methodology and supporting infrastructure that promotes a cross-study investigation of information structure to advance the science of personal information management. Moreover, we observe that the infr...
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Recent research has extended student modeling to infer not just whether a student knows a skill or set of skills, but also whether the student has achieved robust learning - learning that leads the student to be able ...
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Inaccurate perception of distances is a known problem within virtual environments. We hypothesize that the inclusion of virtual characters within these environments can improve an observer's ability to judge dista...
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Inaccurate perception of distances is a known problem within virtual environments. We hypothesize that the inclusion of virtual characters within these environments can improve an observer's ability to judge distances and achieve accurate spatial understanding. We have conducted an empirical study using a desktop display of a small scale environment to evaluate the validity of this concept. We investigated whether the presence and quantity of virtual human characters, as well as the naturalness of their locomotion animations, could improve egocentric and exocentric distance estimations. Preliminary results suggest that static or properly animated characters could improve exocentric estimations, and properly animated characters could reduce egocentric distance compression errors.
Fabric is a dynamic, flexible surface material that holds promise to represent many different kinds of surfaces. We explore how we can use such a flexible material as an interactive 3D input device for various kinds o...
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Fabric is a dynamic, flexible surface material that holds promise to represent many different kinds of surfaces. We explore how we can use such a flexible material as an interactive 3D input device for various kinds of surface design, such as garment and 3D model design. We discuss our fabric-based interactive system and key design considerations for using fabric-based input. In an evaluation of how domain-specific experts use fabric-based input, and how use changes over time, we found that while tracking issues dominated, participants were successful in drawing initial rough sketches of 3D and 2D creations using fabric-based input.
Being able to debate, reflect, form opinions, consider counter evidence and make informed decisions is a foundation of civic life in democratic societies. Government benefits from broad participation in collective dec...
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We designed a collaborative navigation interface in which one user (the controller) guides a second, remote user (the navigator) through a 3D game environment. Both sides of the interface use commercially available ga...
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We designed a collaborative navigation interface in which one user (the controller) guides a second, remote user (the navigator) through a 3D game environment. Both sides of the interface use commercially available gaming hardware. The controller uses full-body gestures to send navigation cues to the navigator, who travels through the environment using typical 3D gaming controls. In an exploratory study, all participants completed the game scenario, and they viewed the system as usable and fun overall, although the limited communication provided by the system was somewhat of a hindrance to collaboration. Navigators, who were led to believe they were being guided by an intelligent system, did not guess that guidance was provided by another human, and felt that an "intelligent system" would typically be more consistent than a human being.
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