Reflections on science, technology, and computing — leavened by personal experience


Had Thoreau had a smartphone, he would not have been texting his best bud, Ralph (Waldo Emerson), about the joys of solitude, nor would he have been tweeting or posting photos of his house construction. I am rather more confident he would have espoused the healing virtues of periodic digital seclusion and contemplation.

Several studies have shown that large parts of the available spectrum are unused most of the time at most locations, within a reasonable detection threshold.With the rise inexpensive, high-performance microprocessors and radio frequency (RF) system-on-a-chip (SoC) designs, more nimble, cognitive radio designs are now possible that can operate across wide portions of the spectrum.