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All of Za3k's Comments + Replies

Open Thread: March 2010
Za3k00

Do we choose a probability p the machine picks A, or does the machine start with a probability p, which we adjust to p+q chance it picks A?

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0[anonymous]
You choose a probability p that the machine picks A. I guess.
Open Thread: March 2009
Za3k20

Although I am no expert, I think your quantum computing comments are incorrect. To explore branches, retaining all histories, you need a "nondeterministic" computer that branches freely. This gives an exponential (2^n) speedup over a classical computer. Quantum computers apparently give only a polynomial one. For more detail, check out Scott Aaronson's blog "Schtetl-Optimized": http://scottaaronson.com/blog/

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The Unfinished Mystery of the Shangri-La Diet
Za3k00

On the note of self-testing vs. controlled experiment, has anyone here tried the polyphasic ("uberman") sleep cycle? Does anyone know of any controlled experiments, either self-administered or larger-scale, which I could look at? I was interested in trying it a few years ago, but dropped in in about 24 hours (before I could have really even been said to try it) due to microsleep in waking hours.

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1Maniakes
I tried it for a few months in grad school. It works better than you'd expect, but not as well as you'd hope. Days 2-3 were very rough, but after I acclimated, my subjective experience was similar to staying up a few hours past my normal bedtime (mild fatigue, but not unpleasant or debilitating if I was actively doing something). Three things killed it for me: 1. It is very difficult to maintain a social life if you need to go home and nap every 3.5 hours on a strict schedule. 2. My class schedule was different on different days of the week, so I had to fudge my nap schedule around the classes. The fatigue was much worse on the days (Tuesdays and Thursdays, I think) that I couldn't keep my usual nap schedule. 3. Any stimulants at all will wreck the sleep cycle, and weird sleep cycle or no, I often find myself needing caffeine in order to acheive the mental energy I need to force myself to focus on something I need to get done. As for formal experiments, the best source I know of is "Why We Nap: Evolution, Chronobiology, and Functions of Polyphasic and Ultrashort Sleep" by Claudio Stampi. It documents most of the existing studies as of when it was written (1992) as well as a formal study conducted by the author. It's out-of-print and fairly rare, but there's a PDF available here: http://sleepwarrior.com/Claudio_Stampi_-_Why_We_Nap.pdf
2persephonehazard
I managed polyphasic sleep for a week once. It was hellish awful, and eventually I couldn't force myself to carry on through the barrier and see if it lifted...
1Kevin
It doesn't seem like anyone really keeps up uberman for much longer than a year. An alternative sleep schedule that I do sometimes is biphasic, 3-5 hours twice a day.