OBJECTIVE To estimate the lifetime risk that an American child will reside in a household receiving food stamps and, as a result, will encounter poverty and a heightened exposure to food insecurity. DESIGN Thirty years of longitudinal data from the Panel Study of Income Dynamics survey data set. SETTING Nationally representative sample of the US population. PARTICIPANTS Approximately 90 0...

ONE might not immediately associate postage stamps with the promotion of mental health ?although philately as a strain-relieving pastime is not without its therapeutic value?but stamps have long since acquired a wider significance than Sir Rowland Hill could ever have envisaged. They have become established as miniature advertising posters, exemplifying on world-wide correspondence an immense v...

We describe a method for repetitive and rapid formation of planar microarrays and gradients of proteins using patterned agarose stamps. It demonstrates: (i) micropatterning of agarose gels with feature sizes as small as 2 microm; (ii) inking of posts (diameter 50-1000 microm) on patterned agarose stamps with one or multiple (here, eight) proteins and repetitive stamping of patterns (>100 times ...

Computer Science today lacks a unified view of Computing. Instead, the main subareas, most notably artificial intelligence, database systems and programming languages, offer different and often competing approaches to knowledge representation, problem-solving and computation. In this paper we propose a unifying logic-based, framework for Computing, inspired by artificial intelligence, but scale...

218 LLE Review, Volume 99 The elastomeric property of poly(dimethylsiloxane) (PDMS) allows stamps made of this polymer to be widely used in replicating patterns with high fidelity through the conformal contact between the substrate and the stamp surfaces.1–3 This unique property is also the origin of stamp deformations. Although the conformal contact is preferred in contact printing, the applic...

Gamma-ray detectors based on bright monolithic scintillation crystals coupled to pixelated photodetectors are currently being considered for several applications in the medical imaging field. In a typical monolithic detector, both the light intensity and the time of arrival of the earliest scintillation photons can be recorded by each of the photosensor pixels every time a gamma interaction occ...