DO P O L I T I C A L C A M PA I G N S M AT T E R ? This question, like so many in political science, seems natural, important, and straightforward. Yet the answer founders on the difAculty of deAning both the subject and the predicate. What do we mean by political campaigns? How might they matter? This essay attempts to organize the study of campaigns by marking its boundaries and by ordering q...

Electronic documents are more easily copied and redistributed than paper documents. This is a major impediment to electronic publishing. Illegal redistribution can be discouraged by placing unique marks in each copy and registering the copy with the original recipient. If an illegal copy is discovered, the original recipient can be identified. In this work we describe several invisible techniqu...

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We describe Pantheia, a system that constructs virtual models of real spaces from collections of images, through the use of visual markers that guide and constrain model construction. To create a model users simply ‘mark up’ the real world scene by placing preprinted markers that describe scene elements or impose semantic constraints. Users then collect still images or video of the scene. From ...

This article reviews recent developments in the assessment of creativity using self-report scales. We focus on four new and promising scales: the Creative Achievement Questionnaire, the Biographical Inventory of Creative Behaviors, the revised Creative Behavior Inventory, and the Creative Domain Questionnaire. For each scale, we review evidence for reliability, validity, and structure, and we d...