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Astronauts, Purdue alumni add their contributions to new slide-rule exhibit
Purdue News Service ^ | 30 August 2004 | Emil Venere

Posted on 08/31/2004 10:04:24 AM PDT by PatrickHenry

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To: RadioAstronomer
Anybody know how to do Reverse Polish Notation on a slide rule?

;-)

61 posted on 08/31/2004 12:55:37 PM PDT by longshadow
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To: longshadow
Anybody know how to do Reverse Polish Notation on a slide rule?

D'OH!
Just do it in a mirror.

Sam Publiuski

62 posted on 08/31/2004 12:59:01 PM PDT by Publius6961 (I don't do diplomacy either)
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To: PatrickHenry

I have wanted a Curta calculator for 45 yrs.

http://home.teleport.com/~gregsa/curta/


63 posted on 08/31/2004 1:01:33 PM PDT by yianni (Mit der Dummheit, kämpfen Götter selbst vergebens.)
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To: RadioAstronomer
My bamboo one is still in perfect shape. :-)

How old is yours? Mine dates from 1947, let's see, that must be 57 years - - I still use it once in a while. For some reason while I was in school I picked up a spare indicator assembly (what was that thing called anyway?) and for a while had two of them on the rule. No real advantage, but it really made people think I was a young genius at calculations.

64 posted on 08/31/2004 1:02:10 PM PDT by 19th LA Inf
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To: Eepsy
Always meant to get myself one of those slipsticks.

Agreed. The HP48 is just too convenient for me, though.

65 posted on 08/31/2004 1:04:59 PM PDT by Chemist_Geek ("Drill, R&D, and conserve" should be our watchwords! Energy independence for America!)
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To: longshadow
First, PH, are you sure about the early 70's being the death of the slide rule? They were still common, if not in preponderance, in freshman physics in '73.

Sales crashed, and production virtually ceased in the early '70s. But old habits die hard, so people continued to use slide rules for a while. The early calculators were expensive, so lots of students stayed with what they already owned. As did their teachers. But not for long.

Second:

Then, in the early 1970s Hewlett Packard came out with the first commercial calculator, the HP-35, signaling an end to the slide rule’s dominance in scientific computing.
Is this accurate? I have this haunting feeling that Sinclair was first (or maybe they were just much cheaper.)

HP wasn't the first. But theirs was the first really functional, affordable, and thus wildly successful calculator. Or so I believe. I'm not well informed about the early history of calculators. You can check this out: The Museum of HP Calculators. They have a link on the HP-35.

66 posted on 08/31/2004 1:07:03 PM PDT by PatrickHenry (A compassionate evolutionist!)
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To: longshadow
he hurled the Sinclair with furious force angainst the chalk board, shattering it into a shower of plastic shards, and stormed out of the room.

There was a lot of competition between HP and TI. HP used the Reverse Polish notation whereas TI followed the more common practice used in all cheap 4-function calculators.

There was a story that the CEO of TI (anyone who worked there will remember his name) once caught an employee using an HP calculator. He did the "hurl" maneuver with the poor guy's private property too.

67 posted on 08/31/2004 1:11:14 PM PDT by 19th LA Inf
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To: RightWhale
Accumath 402.

(I don't recognize half of the constants or formula I wrote on the back, sigh ...)

68 posted on 08/31/2004 1:13:35 PM PDT by dread78645 (Sorry Mr. Franklin, We couldn't keep it.)
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To: PatrickHenry

Just an aside to this article. Both the first and last man to set foot on the moon (Neil Armstrong and Gene Cernan) were Purdue grads.


69 posted on 08/31/2004 1:14:26 PM PDT by NCC-1701 (ISLAM IS A CULT, PURE AND SIMPLE!!!!! IT MUST BE ERADICATED FROM THE FACE OF THE EARTH.)
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To: PatrickHenry
I want a seven-foot slide rule! Be a Geek and build up your arms and shoulders at the same time!
70 posted on 08/31/2004 1:19:46 PM PDT by VadeRetro
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To: PatrickHenry

I remember them. I sold them a few old HP calculators and modules when I retired.


71 posted on 08/31/2004 1:21:43 PM PDT by balrog666 ("One man's theology is another man's belly laugh." -- Heinlein)
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To: PatrickHenry

My fav at the time was the Ti SR-50 :-)

Starving student. I so wanted an Hp-65!!!

Have an Hp-65 now as a keepsake.


72 posted on 08/31/2004 2:16:36 PM PDT by RadioAstronomer
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To: Ichneumon
Oh wow!! I forgot all about this

I remember you had to put it together.

I never got the hang of it though. Everytime I inputted something...It came back 42.

73 posted on 08/31/2004 3:51:02 PM PDT by Focault's Pendulum (I Just fell off the boat!! Kerry I need you! Uh..nevermind, it's only hip deep...right now.)
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To: js1138

Just a note that Phillip Pullman's trilogy, though admittedly well written, is very against religion, and, according to the author himself, written to be an "anti-Narnia". Parents especially need to be aware of this as they are quite popular with librarians who run Young Adult book discussion groups, and also some English teachers.

Yes, I have read them, yes they are mostly good writing, no, I'm not saying they should go unread. People do need to be aware of an author's intentions, though, and I fear Christian conservatives have let these books go under the radar, so preoccupied they have been with Harry Potter; they may not be aware of the dangers contained within them to children ill-prepared to deal with the anti-God premise so heavily emphasized.


74 posted on 08/31/2004 6:02:39 PM PDT by Eepsy (Today's Read-Aloud: The Five Chinese Brothers)
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To: Eepsy

I haven't finished and can't judge the anti-God perspective. There is more than a bit of anti-church perspective, however most of this is related to practices which the church has abandoned. I'll see when I finish.

There is an interesting web site (bridgetothestars.net) that has a parody interview with a hollywood producer planning a movie of the series.


75 posted on 08/31/2004 6:15:30 PM PDT by js1138 (Speedy architect of perfect labyrinths.)
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To: PatrickHenry

Thanks for the ping!


76 posted on 08/31/2004 8:52:15 PM PDT by Alamo-Girl
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To: Focault's Pendulum

Yes, 42 is the answer, but what question were you asking it? (My apologies if you've never read the Hitchhikers' Guide Trilogy)


77 posted on 09/01/2004 5:32:29 AM PDT by stremba
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