scientists find themselves in an odd, but perhaps not surprising, situation. As the number of studies increases, so does the number of conflicting results. On page 80 of this issue, Patel and Balaban provide an example of what has been missing in neuroimaging — a new approach that adds time as the fourth dimension. Usually, three-dimensional images of cerebral blood flow, metabolic changes or t...

Digital testing in the last three decades has taught us the value of design for testability (DFT). Disciplines such as scan and built-in self-test (BIST) have emerged as standard practices because they allow logic testing of arbitrarily large systems. This has been one of the greatest achievements in testing thus far. These past decades have also produced significant advances in semiconductor t...