|
"Math-making seems the opposite of automatic, which is why scientists long thought it had nothing to do with our ancient, pre-verbal size-em-up ways. Yet a host of new studies suggests that the two number systems, the bestial and celestial, may be profoundly related, an insight with potentially broad implications for math education. "
NY Times article[^].
An interesting article from the New York Times about the human capacity for mathematics and its implications for math education.
...that mortally intolerable truth; that all deep, earnest thinking is but the intrepid effort of the soul to keep the open independence of her sea; while the wildest winds of heaven and earth conspire to cast her on the treacherous, slavish shore.
|
|
|
|
|
That was pretty damn interesting. I like the 'bestial' & 'celestial' thing they had going there, kinda reflects how I feel about it. I also took their coloured dots test and I got 100%. 
|
|
|
|
|
It's hard to find articles like that. I usually get them from the NYTimes or the CBC.
Speaking of the CBC, you may enjoy their science program, Quirks and Quarks[^].
Glad you enjoyed that.
...that mortally intolerable truth; that all deep, earnest thinking is but the intrepid effort of the soul to keep the open independence of her sea; while the wildest winds of heaven and earth conspire to cast her on the treacherous, slavish shore.
|
|
|
|
|
73Zeppelin wrote: Speaking of the CBC, you may enjoy their science program, Quirks and Quarks[^].
Glad you enjoyed that.
Thanks!  ![Rose | [Rose]](https://www.codeproject.com/script/Forums/Images/rose.gif)
|
|
|
|
|
73Zeppelin wrote: Speaking of the CBC, you may enjoy their science program, Quirks and Quarks
I'm going to have to check that out. Thanks for the link
"The clue train passed his station without stopping." - John Simmons / outlaw programmer
"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon
"Not only do you continue to babble nonsense, you can't even correctly remember the nonsense you babbled just minutes ago." - Rob Graham
|
|
|
|
|
Paul Conrad wrote: I'm going to have to check that out. Thanks for the link
No problem - it's a very good program, award winning even!
...that mortally intolerable truth; that all deep, earnest thinking is but the intrepid effort of the soul to keep the open independence of her sea; while the wildest winds of heaven and earth conspire to cast her on the treacherous, slavish shore.
|
|
|
|
|
That's very interesting indeed 
"The clue train passed his station without stopping." - John Simmons / outlaw programmer
"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon
"Not only do you continue to babble nonsense, you can't even correctly remember the nonsense you babbled just minutes ago." - Rob Graham
|
|
|
|
|
can anyone tell me the algorithm for the pseudo random number generator? and how it works, i tried searching the net but to no avail..
thanks in advance,
nico
|
|
|
|
|
|
niconicx wrote: i tried searching the net but to no avail..
Or this[^] one. 
If you don't have the data, you're just another a**hole with an opinion.
|
|
|
|
|
See also here [^].
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
|
|
|
|
|
Hey, I don't think that six you rolled is completly random. Since there are more pips on that face than the opposing face (one), it likely be up more often than not.
"Love people and use things, not love things and use people." - Unknown
"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch
|
|
|
|
|
Well I'm working on the anti-gravity vacuum glass box... 
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
|
|
|
|
|
DavidCrow wrote: there are more pips on that face than the opposing face (one), it likely be up more often than not.
Not really; they're only one-sixth as deep as the one on the opposite side.
"A Journey of a Thousand Rest Stops Begins with a Single Movement"
|
|
|
|
|
I know, but the mass distribution is different. 
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
|
|
|
|
|
Roger Wright wrote: Not really;
How so?
Roger Wright wrote: ...they're only one-sixth as deep...
All pips are drilled to the same depth on a die.
"Love people and use things, not love things and use people." - Unknown
"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch
|
|
|
|
|
Okay, so I was guessing...
But seriously, it's only one part of the equation. On the pair of sides showing 6 and 1 pip, one can consider that a shift in the center of mass occurs equal to some distance proportional to the ratio of the mass of one pip to the entire die in the direction of the face with 1 pip. Call that distance (6-1)l = 5l, and its direction i .On an adjacent face, the 5 counters the 3 for a distance of (5-3)l = 2l in the direction j. Normal to the plane formed thus is the pair 4 and 3, at a distance l in the k direction. The total distance by which the centroid shifts is then sqrt(25+4+1)*l = 5.477*l. Its direction is left as an exercise for the student, but it is decidedly not toward the face showing a 1. Remember, too, that we can't just rely on the measure of missing plastic in the pips, but must add back the mass of the paint used to mark each, and that might have a specific gravity much higher or lower than the base material.
For practical purposes, the amount shift in the center of mass is negligible compared to the random variations in surface texture of the felt on the table, and the influence of random air currents from breathing, talking, air conditioning, passers by, and the occasinal fart. 
The outcome is close enough to random for any engineering use, though a mathematician might argue the point.
"A Journey of a Thousand Rest Stops Begins with a Single Movement"
|
|
|
|
|
Roger Wright wrote: For practical purposes, the amount shift in the center of mass is negligible compared to the random variations in surface texture of the felt on the table, and the influence of random air currents from breathing, talking, air conditioning, passers by, and the occasinal fart.
Hey, you're definitely cheating: my (pseudo ) random device rolls in a vacuum box!
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
|
|
|
|
|
Well then, I guess the only way to resolve the matter is for you to build your machine, then run it through 6^(6^6) iterations and see if the Universe ends.
"A Journey of a Thousand Rest Stops Begins with a Single Movement"
|
|
|
|
|
CPallini wrote: See also here [^].
im sorry for being somewhat dumb.. but can you explain the picture? thanks..
regards
|
|
|
|
|
Well it is a (pseudo: see David Crow's post...) random number generator device.
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
|
|
|
|
|
LOL. It is a pratical random generator. I used to write numbers on my square eraser and toss them to decide my answer for Multiple Choice Questions during tests that I didnt study.
|
|
|
|
|
I obtained better results even for tests I did study.
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
modified on Tuesday, September 16, 2008 11:42 AM
|
|
|
|
|
|
I'm using a scanner to create my tokens and a parser to create the tokens into a meaningful AST.
After a good start on my project, I noticed that if i made my scanner create generalized tokens my parser logic needed more work but if i create more specific tokens my parser logic was greatly reduced.
anyone have a rule of thumb(s) when i should put the responsibility on the scanner or when it should be placed on the parser?
-lm
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
