aviatoreb Posted March 14, 2019 Report Posted March 14, 2019 (edited) Let Pi Fly! Happy Pi day everyone! Prof EB Edited March 14, 2019 by aviatoreb 5 Quote
Bob_Belville Posted March 14, 2019 Report Posted March 14, 2019 Grandson took Woopie Pies to school today. 9 1 Quote
carusoam Posted March 14, 2019 Report Posted March 14, 2019 Happy pi day... all day long! STEM thoughts only, not a mathematician. best regards, -a- 1 Quote
aviatoreb Posted March 15, 2019 Author Report Posted March 15, 2019 13 minutes ago, carusoam said: STEM thoughts only, not a mathematician. -a- That was really funny specializing your usual disavowing expertise statement. 3 Quote
aviatoreb Posted March 15, 2019 Author Report Posted March 15, 2019 21 minutes ago, Bob_Belville said: Grandson took Woopie Pies to school today. I love it! There is more "Pi" relative mathematical science in that arrangement than I think your grandson, or maybe even the teacher suspects, I would guess: https://en.wikipedia.org/wiki/Close-packing_of_equal_spheres 2 Quote
Bob - S50 Posted March 15, 2019 Report Posted March 15, 2019 My granddaughter was born at 3:14 on 3/14 so her middle name is Pi. 3 1 2 Quote
aviatoreb Posted March 15, 2019 Author Report Posted March 15, 2019 16 minutes ago, Bob - S50 said: My granddaughter was born at 3:14 on 3/14 so her middle name is Pi. That is such a great middle name!!! Quote
aviatoreb Posted March 15, 2019 Author Report Posted March 15, 2019 39 minutes ago, 1964-M20E said: PI i'm waiting for cookie day. https://www.thingiverse.com/thing:28882 1 Quote
Bob_Belville Posted March 15, 2019 Report Posted March 15, 2019 1 hour ago, aviatoreb said: I love it! There is more "Pi" relative mathematical science in that arrangement than I think your grandson, or maybe even the teacher suspects, I would guess: https://en.wikipedia.org/wiki/Close-packing_of_equal_spheres Maybe Eric, otoh the teacher was impressed and reposted my daughter's FB post of the pic. Daughter Sharon studied math at MIT where she met her husband. Pi has been a favorite theme for them. 1 Quote
aviatoreb Posted March 15, 2019 Author Report Posted March 15, 2019 6 minutes ago, Bob_Belville said: Maybe Eirc, otoh the teacher was impressed and reposted my daughter's FB post of the pic. Daughter Sharon studied math at MIT where she met her husband. Pi has been a favorite theme for them. Cool! my favorite application of packing theorems comes in coding theory which is a very remote nonintuitive application at first glance. And to bring it ... full circle... (haha) MIT has a special place in the history of information theory since that’s where the founding father Claude Shannon was. 1 Quote
Hank Posted March 15, 2019 Report Posted March 15, 2019 In celebration of Pi(e) Day, we did this tonight: 3 Quote
Yetti Posted March 15, 2019 Report Posted March 15, 2019 I am surrounded by engineers..... all day long www.osisoft.com Our software is called PI 1 Quote
m20kmooney Posted March 15, 2019 Report Posted March 15, 2019 8 hours ago, Hank said: In celebration of Pi(e) Day, we did this tonight: 5 1 Quote
1964-M20E Posted March 15, 2019 Report Posted March 15, 2019 48 minutes ago, m20kmooney said: some people have too much time on their hands 1 Quote
aviatoreb Posted March 15, 2019 Author Report Posted March 15, 2019 A Bi Plane has 2 wings. A Pi Plane is irrational. 1 Quote
aviatoreb Posted March 15, 2019 Author Report Posted March 15, 2019 6 minutes ago, skydvrboy said: You know what really bothers me? Its my electrical engineering friends. They think i should represent current since for some reason current is more important to them than imaginary numbers. So since i is already used up they use j for the sqrt of negative one. ??!! And as many on here know, but I will repeat because it is beautiful... Euler: exp(I theta)=cos(theta)+isin(theta) so exp(iPi)+1=0. (but those silly EE sorts say exp(jPi)+1=0) 1 Quote
skydvrboy Posted March 15, 2019 Report Posted March 15, 2019 I have an industrial engineering degree and now work in the electrical industry, so I know what you mean about those crazy EE's. For instance, I learned Joule's law as P=IV (Power = Current x Voltage), but they want to use P=IE (E being electromotive force). I don't know if they feel like they have to be different all the time or if they just like PIE. Quote
aviatoreb Posted March 15, 2019 Author Report Posted March 15, 2019 30 minutes ago, skydvrboy said: I have an industrial engineering degree and now work in the electrical industry, so I know what you mean about those crazy EE's. For instance, I learned Joule's law as P=IV (Power = Current x Voltage), but they want to use P=IE (E being electromotive force). I don't know if they feel like they have to be different all the time or if they just like PIE. I have taught Complex analysis - the class - in a variety of formats for math majors, for engineers, or also at the graduate level. The EE's in my class always seem to groan in pain when I write i...as anything but current. Quote
N201MKTurbo Posted March 15, 2019 Report Posted March 15, 2019 1 hour ago, aviatoreb said: You know what really bothers me? Its my electrical engineering friends. They think i should represent current since for some reason current is more important to them than imaginary numbers. So since i is already used up they use j for the sqrt of negative one. ??!! And as many on here know, but I will repeat because it is beautiful... Euler: exp(I theta)=cos(theta)+isin(theta) so exp(iPi)+1=0. (but those silly EE sorts say exp(jPi)+1=0) I was working with that yesterday! On a grinder that has to match 4 different local planes to the product plane. Some people just don't get it... 1 Quote
aviatoreb Posted March 15, 2019 Author Report Posted March 15, 2019 2 hours ago, N201MKTurbo said: Some people just don't get it... You and I get it. :-) Quote
steingar Posted March 15, 2019 Report Posted March 15, 2019 Pi day sucked. I was sick. What really sux is the Ides of March is better. I'll do my aviating tomorrow if the wx cooperates. 1 Quote
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