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2017
622

Can a Human See a Single Photon? (1996)

The human eye is very sensitive; but can we see a single photon? The answer is yes: sensors in the retina can respond to a single photon. But neural filters only allow a signal to pass to the brain to trigger a conscious response when at least about five to nine arrive within less than 100 ms. If we could consciously…

623

Tom Duff on Duff's device (1988)

I normally do not read comp.lang.c, but Jim McKie told me that `` Duff's device '' had come up in comp.lang.c again. I have lost the version that was sent to netnews in May 1984, but I have reproduced below the note in which I originally proposed the device. (If anybody has a copy of the netnews version, I would…

630

Software architecture is failing

I doubt there has ever been a time when software architecture was seen as a raging success. The “three-tier architecture” of the web has held up extremely well and is an excellent place for many people to start. The “12 Factor App” approach has encouraged developers to adopt practices that make deployment and scaling…