Stephen Davies

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If non-technical end users are to contribute to the Web of Data as they have to the Web of Documents, they must employ tools that enable them to do so. This challenge is not easy to meet, as formal knowledge representation is a daunting task for the uninitiated. Indeed, we have empirically observed that expressing anything but the most straightforward of(More)
People often use powerful tools to manage the documents they encounter, but very rarely to store the mental knowledge they glean from those documents. Popcorn is a <i>personal knowledge base</i>: an experimental interface and database designed to store and retrieve a user's accumulated personal knowledge. It aims to let the user represent information in a(More)
We present results from a nationwide survey of undergraduate computer science departments regarding languages and techniques taught in CS0, CS1, and CS2. This snapshot of 371 schools provides an intriguing look into the state of computing education today in the U.S., quantifying which practices are actually in common use. Among other things, the study(More)
Most Semantic Web query interfaces let the user give an abstract specification of the desired results (perhaps using facets, or a natural language query.) We introduce the Smeagol visual query interface which, by contrast, guides the user from a specific example to a general result set. Users begin the query process with navigation and exploration(More)
We review the literature for evidence of posttraumatic stress disorder that emerges in older adulthood yet is related to earlier life events. Minimum standards necessary to establish the phenomenon are proposed and applied to existing group and case studies. Our findings suggest that the best evidence for this rests with a handful of group studies featuring(More)
Although many low-income urban areas are highly walkable by conventional measures such as population density or land use mix, chronic diseases related to lack of physical activity are more common among residents of these areas. Disparities in neighborhood conditions may make poor areas less attractive environments for walking, offsetting the advantages of(More)
Infectious music: music-listener emotional contagion I have long been interested in the expression of emotion in music and in the response this calls forth from the listener. One such response is a mirroring or echoing one; sad music tends to make (some) listeners feel sad and happy music to make them happy. This mirroring reaction is brought about by what(More)
LIMITED DISTRIBUTION NOTICE: This report has been submitted for publication outside of the University of Colorado and will probably be copyrighted if accepted for publication. It has been issued as a Technical Report for early dissemination of its contents. In view of the transfer of copyright to the outside publisher, its distribution outside of the(More)