We examine the problem of searching sequentially for a desired real value (a key) within a sorted unbalanced three-dimensional finite real array. This classic problem can be viewed as determining the correct dimensional threshold function from a finite class of such functions within the array, based on sequential queries that take the form of point samples. This note addresses the challenge of ...

We report a paper analytical device (PAD) that is based on the SlipChip concept. This SlipPAD enables robust, high-throughput, multiplexed sensing while maintaining the extreme simplicity of paper-based analysis. The SlipPAD is comprised of two wax-patterned paper fluidic layers. By slipping one layer relative to the other, solutions wick simultaneously into a large array of sensing reservoirs ...

A single biological object, such as a hand, can assume multiple, very different shapes, due to the articulation of its parts. Yet we are able to recognize all of these shapes as examples of the same object. How is this invariance to pose achieved? Here, we present evidence that the visual system maintains a model of object transformation that is based on rigid, convex parts articulating at extr...