typodupeerror

• #### What would a real nerd do? (Score:2)

A real nerd would know how to calculate Pi from scratch, no shotgun required...

Pi = (4/1) - (4/3) + (4/5) - (4/7) + (4/9) - (4/11) + (4/13) - (4/15) ... (keep going until you get the number of decimal places you need.)

Why bother with the shotgun and waste the rounds conducting this worthless experiment. You are proving nothing but that you know how to draw a square and an arc and count.

OR, just get some unsuspecting length of string, a ruler and a round object like a jar or large can. Measure the circ

• #### Re: (Score:2)

A real nerd would know how to calculate Pi from scratch, no shotgun required...

Pi = (4/1) - (4/3) + (4/5) - (4/7) + (4/9) - (4/11) + (4/13) - (4/15) ... (keep going until you get the number of decimal places you need.)

Gaaaa! What? How about 22 / 7 . Way closer, less painful. Nerds do it more efficiently and more accurately. That was about as bad as the shotgun method, maybe worse. I stopped doing the math at (4/15) when the result was 3.01[something] and adding (4/17) was 3.25[something] ... Not even close.

• #### Re: (Score:2)

Why bother with the shotgun and waste the rounds conducting this worthless experiment.

Because it's fun.

You must be loads of laughs at a party.

--
BMO

• #### So wait, shotguns are more accurate than the bible (Score:5, Interesting)

on Monday April 14, 2014 @10:00AM (#46746827)
"And he made a molten sea, ten cubits from the one rim to the other it was round all about, and...a line of thirty cubits did compass it round about....And it was an hand breadth thick...." — First Kings, chapter 7, verses 23 and 26

30/10 = 3

Bible Pi = 95.493% accurate
Shotgun Pi = 99.67% accurate
• #### Re:So wait, shotguns are more accurate than the bi (Score:4, Interesting)

<gar37bicNO@SPAMgmail.com> on Monday April 14, 2014 @10:26AM (#46747157)

Research back in the 1930s discovered that there's more to that verse than appears. In Hebrew, the letters are also numbers, and the number values of letters and words are often very significant to the reading. There is a 'jot' ('jot' and 'tittle' are like diacritic marks) in the original, which here means, "look deeper". So with a bit of deeper analysis, one finds that the letters there turn out to make up a fraction. I forget what the fraction is, but it's something like 31/222 or some such, and with the fraction the value is within 1% or less of pi. This is discussed in one of Chuck Missler's research texts, about that book in the Bible.

• #### Re:So wait, shotguns are more accurate than the bi (Score:5, Insightful)

by Anonymous Coward on Monday April 14, 2014 @10:35AM (#46747259)

That's a lot of numerological bullshit. The truth is much simpler. The Bible says it's 10 cubits across and 30 cubits around. The diameter is provided with one significant figure, and the circumference is also provided with one significant figure. Dividing the two gives you pi... to one significant figure. Anyone who says "this proves that the Biblical authors thought pi = 3.00 [3 significant figures]" must not have done very well in physics class.

• #### Re: (Score:2, Troll)

Nope. You're just presenting a more subtle version of numerological bullshit.

Having only one significant digit means that the actually value for 10 is somewhere between 6 and 14 and the value for 30 is somewhere between 26 and 34. Measurements were not that inaccurate (you don't really think they only have a 15 foot rope to measure with and absolutely nothing else, do you?).

10 and 30 have 2 significant digits even if you assume that they rounded to whole numbers and didn't want to use fractions or decimal

• #### use a piece of string (Score:2)

Measure the diameter and circumference then divide with a slide rule. And get off my lawn.
• #### Chokes (Score:2)

Shotgun pattern distribution is governed by several factors, including shot quality / material, wad design, barrel design, hull design, forcing cone length / shape, but most especially choke. Steel shot will rip up some chokes. Chokes can creep (particularly on a hot Illinois day). Wadding can foul a barrel.

I wonder if these were controlled for.

• #### Re: (Score:2)

Glad I'm not the only one whose first question involved the choke.

BTW, you forgot "windage" in your variable list.

• #### Re: (Score:2)

I never noticed it, at least not in the ranges as described. Sometimes the clay can bounce a bit, but even that is rather marginal if you are shooting correctly.

• #### Re: (Score:2)

Depends on the wind; we've been getting 30-40 Mph gusts the last few days, which could have some effect at 20 meters. 'Specially with grouse rounds.

At least TFA mentions the load they used: "cartridges composed of 3 dram equivalent of powder and 32 grams of #8 lead pellets"

• #### Anyone know random the spread of the Mossberg is (Score:2)

The above would only work if the spread were random. I would expect it to cluster with a greater density of pellets in the middle. Does anyone know how random the spread is?
• #### those damn sand-eating zombies! (Score:2)

Dumoulin and Thouin’s idea is to use the distribution of shotgun pellets rather than sand or rice (which would presumably be in short supply in the post-apocalyptic world).

really...sand in short supply?

and shotgun shells aren't?

• #### Just weigh the aluminium target (Score:2)

Swap the gun for some tin snips and a scale. You could simply weigh the whole target, then snip out the quarter circle and weight that. Take the ratio of the weights, and you're done.

Save the ammo for something else.

• #### Re: (Score:2)

Swap the gun for some tin snips and a scale.

Why not swap the gun for an encyclopedia instead? Come to think of it, use the gun to threaten the encyclopedia salesman. Win-win.

• #### Hmmm (Score:2)

If you really want to use this method to calculate pi, here's how to actually go about it. What you need is a hundred yards or so of string, four stakes, a stick and something that's a reasonable approximation to a right-angle (perhaps a piece of a cardboard box salvaged from the apocalypse). If you're really stuck for a right angle you can construct one with three stakes and a piece of string by putting two stakes in the ground and using the string to mark a straight line between them, then tying one end

• #### Re: (Score:2)

Couldn't you just draw out a circle with string and a stake, then lay a second piece of string over the drawn circle, then measure the two bits of string with a stick?

• #### Buffon's needle (Score:3)

on Monday April 14, 2014 @10:32AM (#46747221)

Another method :
http://en.wikipedia.org/wiki/B... [wikipedia.org]

• #### Nothing special. (Score:4, Insightful)

on Monday April 14, 2014 @10:32AM (#46747223) Journal
This was one for the first exercises done in Introduction to Computing 201, using a random number generator to find the value of PI. I did it in FORTRAN back in the days with punch cards in IBM370/155. Recently I did it again to teach myself MPI. This is a basic exercise in Probability and Statistics course. Once can draw a circle in fly paper. The number of bugs caught inside the circle to total number of bugs caught would be approximately PI/4. But that would get you a better headline, "Bugs commit suicide to tell us the value of PI".
• #### Assumptions? (Score:2)

Doesn't this rely on some rather shaky assumptions, mainly that the spread of the shotgun pellets across the target is completely random (which we know it isn't; the likelihood of a pellet hitting diminishes as you move away from the centre)?

• #### Amazing to think ... (Score:2)

... that the Ancient Greeks managed to do better at calculating Pi, all without shotguns!
• #### Or... (Score:2)

...they could take the same sheet of aluminum, weigh it, cut along the arc that they already inscribed and weigh the quarter circle, and multiply the ratio in the weight by four. Or, they could take a length of string, carefully line it up with the arc they already inscribed and snip it, form the ratio of its length $\pi R/2$ and the length of a side of the square R, and multiply by 2. Or they could evaluate using any one of a number of summed series. Or any of a number of other measurement-based geometr

• #### Why mathemeticians won't survive. (Score:2)

Apocalypse, eh?

I would probably be using the mathematician standing in the corner wasting shotgun shells calculating Pi as bait during the next zombie attack.

Just sayin.

• #### Unlike computing, math tech will still work (Score:2)

Unless solar powered calculators magically disappear
and people forget about how to use string and rulers.

• #### Infinite series (Score:3)

on Monday April 14, 2014 @11:13AM (#46747651)

Just calculate 4-4/3+4/5-4/7+4/9-4/11... to as many significant figures as you'd like. It converges to exactly pi.

• #### Time saving tip for these guys (Score:5, Funny)

on Monday April 14, 2014 @11:18AM (#46747707) Homepage

Come to Tennessee or Indiana and drive out in the country. Pretty much half the stop signs have already been prepped for you - you just have to count holes.

• #### Or find a library? (Score:3)

on Monday April 14, 2014 @12:59PM (#46748757)
There are definitely old school reference books with the value of pi to hundreds if not thousands of decimal places.

Unless the zombies take up reading or eat books, and you don't break your glasses, we're good to go.

.

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