Dad's Harbor Freight Wishlist
2005, November 22, Tuesday, 09:17
3" Air High Speed Cutter $9.99 #47077
10 pc 3" cutting Disks $4.99 #44812
3 way Grounded Power Outlet $2.99 #45185
Farm Jack $29.99 #6530
5" vise w/Pipejaws $37.99 #36990
50' 12 ga Extension Cord $15.99 #41444
7" Benchtop tile saw $59.99 #40315
Grinder Pedestal $16.99 #42986
24 oz Framing Hammer $2.99 #47893
Hand Truck $25.99 #91540
and also
Reciprocating Saw
Car Air Compressor
50' 12/3 cable
Electric Chainsaw
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( 3 / 1718 )Godel's Theorem
2005, November 21, Monday, 20:38
Nothing really original here. Just a link to a webpage which tries to put it succinctly. I spent numerous hours with the $7 copy of Godel's "On Formally Undecidable Propositions"
See this terse description of Godel's Incompleteness Theorem
While I liked Godel, Escher, Bach: An Eternal Golden Braid by Douglas Hofstader (I first read Radha's copy in the basement of my dorm at CWRU while doing bunch of laundry), it's been criticized for twisting each of the three components a bit too much to fit together.
A few years ago I worked through GEB again while not distracted by laundry. It clicked better now than it did in 1993 (over ten years ago).
So I took pen and paper and worked through the first quarter of Godel's paper itself before I got bogged down in the damn notation. For example, I think I couldn't keep in my head that Bew(x) came from the German word Beweisbar and meant "provable". I started to write in the english translations but had to stop. I need to tackle this again. Why? I'm not sure. I'm hoping that the
modernized translation will make things more accessible.
Occasionally I attempt to work through Godel and other mathematical logic papers to occupy my brain to the extent that it tends to to blank out pretty much any other through process going on.
On somewhat of a tangent, I kept a New Scientist magazine article which I quite liked which is entitled In the beginning was the bit. It paraphrased/described a paper by Professor Anton Zeilinger called
"A Foundational Principle for Quantum Mechanics" We've since lapsed in our subscription as New Scientist has gone a bit down hill lately. It's a shame Scientific American has been dumbed down. I appreciated not being able to fully appreciate every article.
-- Pete
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( 3 / 1422 )Pics from Oregon
2005, October 30, Sunday, 13:16
We went on a vacation with Radha's parents to Oregon this summer the week of Fourth of July. We stayed in Port Orford in a cottage overlooking Agate Beach.
Oregon July 2005
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( 3 / 1434 )Oregon 05
2005, October 30, Sunday, 11:38
Coming soon! Pictures from Oregon, July 2005
Fourth of July Fireworks at Port Orford, Oregon
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( 3 / 1342 )Mr Angry and Ms Calm
2005, October 26, Wednesday, 15:12
Radha found this on BoingBoing.net
;)
On exhibit at the Exploratorium in San Francisco
Courtesy of Aude Oliva (MIT) and Philippe Schyns (University of Glasgow)
On a close-up view, you can see on the left face, an angry man and on the right face, a woman with a neutral facial emotion. But step (much) further back, the faces change expression and even genders! if you squint, blink, or defocus, an angry man should substitute for the face of the woman and the left angry face should not be angry anymore.
This impressive illusion created by Dr. Aude Oliva and Dr. Philippe Schyns, illustrates the ability of the visual system to separate information coming from different spatial frequency channels. In the right image, high Spatial Frequencies (HSF) represent a woman w69, 243-ith a neutral facial expression, mixed with the low spatial frequency information from the face of an angry man.
The above two ambiguous faces, termed hybrid faces, are published in the journal Cognition, 69, 243-265, 1999. Elsever publisher
http://cvcl.mit.edu/gallery.htm
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