What is the newest installment of 'Random Thoughts' on Physics Forums?

[fresh_42]

Neither he nor any of his team talked about Kolmogorov sets before taking office. Proof: fantasy and reality are not distinguishable by team Trump.

Yeah, very surprising, as they are otherwise really good at separations.

 

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[dkotschessaa]

Used my beard trimmer before coming to work today. When I looked in the mirror at work there was one grey one that apparently survived the trimming. Tried to pull it out by hand, but the tough lil' bastard will not leave.

I'm actually encouraged by this, as I am sure it is some kind of metaphor for ageing.

-Dave K

 

[Enigman]

I'm actually encouraged by this, as I am sure it is some kind of metaphor for ageing.

The old that is strong does not wither,
Deep roots are not reached by the frost.

 

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[dkotschessaa]

People from the Philippines are Filipino, not Philipino, and I find that conphusing.

 

[fresh_42]

How do you call people from Illinois?

 

[jim hardy]

How do you call people from Illinois?

Hmm ...
...i remember one called an "Illini Eyefull" .
http://www.explayboybunnies.com/biographies/diannechandler/dianne.html

 

[OmCheeto]

How do you call people from Illinois?

Not sure what the people are called, but I seem to recall a conversation from about 35 years ago where someone from Missouri referred to Illinois as; "Illinoise", and vice versa; "Misery".

hmmmm... I wonder how French people pronounce "Illinois"?
Il-lay-nwah? Ee-lee-nwah?

Never bin to France. I have a new Facebook girlfriend from there though. She seems nice. Though... hmmmm... I think she's 1/3 my age, so I think I put her on FB "mute" about a month ago. Young people's brains work to fast, IMHO.

 

[nuuskur]

Illinoians? Illinoisians? Illians?

 

[fresh_42]

Not sure what the people are called, but I seem to recall a conversation from about 35 years ago where someone from Missouri referred to Illinois as; "Illinoise", and vice versa; "Misery".

I thought it might have been something noisy. But "Misery" is good one.

hmmmm... I wonder how French people pronounce "Illinois"?

Should be no problem: Illinoises doesn't sound noisy in French. But I'm not sure whether it's French at all. They have a lot of indigenous names up there.

 

[fresh_42]

Illinoians? Illinoisians? Illians?

Sounds annoying.

 

[Enigman]

How do you call people from Illinois?

With my phone.

 

[nuuskur]

People come to me after seeing a youtube video about how the sum of all natural numbers is some magical -\frac{1}{12} and they back it up by saying " .. but they say it's often used in QM, so it must be true..!" . I'm like: nope, that is not the sum of natural numbers :(

 

[collinsmark]

People come to me after seeing a youtube video about how the sum of all natural numbers is some magical -\frac{1}{12} and they back it up by saying " .. but they say it's often used in QM, so it must be true..!" . I'm like: nope, that is not the sum of natural numbers :(

It is in a certain sense when involving analytic continuation of a function* that produces that sum. https://en.wikipedia.org/wiki/1_+_2_+_3_+_4_+_⋯

*(for example the Riemann Zeta function of -1.)

 

[nuuskur]

I have seen a few proofs of the claim. One that abuses the Riemann zeta function \zeta (s) := \sum_{k=1}^\infty \frac{1}{k^s}. This is valid only when Re(s)>1. and they conclude result by
<br /> \zeta (s) = 2^s \pi ^{s-1}\sin\left (\frac{s\pi}{2}\right )\Gamma (1-s)\zeta (1-s)\vert _{s=-1} = -\frac{1}{12}<br /> which, indeed, is true, but its association to the series representation is invalid. Then there is the geometric series "proof" where they say \sum_{k=0}^\infty x^k = \frac{1}{1-x} and they do mention that it is valid when x&lt;1, but then conviniently set x=-1 and conclude their result. In reality, the sum is valid when |x|&lt;1 i.e they cheated. It's known as ex falso quodlibet. Proceed under false assumptions and conclude that the Sun is smaller than the Earth.. hooray. Not quite -.-

If we involve analytic continuation then we are no longer talking about the sum in the traditional sense. This is the part people get confused, because nobody explicitly states that we aren't actually talking about the sum in the sense of addition. It's more like, we assign a value to this series and prove that the operation is valid. But that's not exciting, is it?

I wouldn't be studying pure mathematics if the principles of logic were so easily defied without consequence. The heretics may preach what they wish, at that point, what they dabble in is no longer backed by logic, therefore not mathematics.

 

[jim hardy]

The trouble with computers is they enable us to transfer our human stubbornness, pettiness and chicanery to what ought to be be well behaved predictable and obedient machines.

 

[dkotschessaa]

The trouble with computers is they enable us to transfer our human stubbornness, pettiness and chicanery to what ought to be be well behaved predictable and obedient machines.

That is actually a very well crafted and quoteworthy statement.

 

[fresh_42]

 

[DennisN]

 

[DennisN]

Science in ancient Egypt: hierophysics.

 

[WWGD]

Have no fear, Summer is here: Longest sunny day I can remember. It is 5:15 and the sun looks as in a standard sunny day at around 1 p.m. Yet it snowed two days ago. Kind of confusing.

 

[fresh_42]

Have no fear, ...

Easily said. Since I've heard Iggy in a commercial, I mean Iggy, ... I've lost all my trust in this world.

 

[WWGD]

Easily said. Since I've heard Iggy in a commercial, I mean Iggy, ... I've lost all my trust in this world.

Iggy? German TV?

 

[fresh_42]

Yep. Not himself, just his song.
... half naked old men don't sell well even here ...

 

[ShayanJ]

The new year just started in Iran. We entered 1396!
I hope tensions start to decrease all over the world.

 

[nuuskur]

We entered 1396

does not compute

 

[dkotschessaa]

Have no fear, Summer is here: Longest sunny day I can remember. It is 5:15 and the sun looks as in a standard sunny day at around 1 p.m. Yet it snowed two days ago. Kind of confusing.

Dreading the arrival of summer here in FL. "Winter" has been beautiful. Even spring has been kind of mild with a few days in the upper 80s.

 

[fresh_42]

Mom says, I'm still a planet!

 

[zoobyshoe]

I watched a video of a small house being printed by a large 3-D printer. Instead of plastic it was "printing" in cement. That pushed me over into now believing that 3-D printing is the future of everything.

 

[fresh_42]

Dang, I just recognized, that I know what a choke is.

 

[WWGD]

Dang, I just recognized, that I know what a choke is.

How about an anti-choke , or at least an arti-choke ( which is different from an artsy choke and an artsy bloke )?

 

[Aufbauwerk 2045]

does not compute

@ShayanJ refers to the Persian calendar. It seems March 21 2017 was 1 Farvardin 1396. Happy New Year to all those who follow the Persian Calendar.

https://www.vercalendario.info/en/calendars/persian-calendar/compare-1396.html

I should put this under What I Learned Today. I was not familiar with the Persian calendar.

 

[Aufbauwerk 2045]

P.S. I'm signing off just after Stardate 94830.44. Live Long and Prosper!

Although some sites differ on the exact Stardate. I have not found anything authoritative. Here is my source.

http://www.stoacademy.com/tools/stardate.php

 

[OCR]

Here is my source.

Yeah, and with a typical Ferengi.... $ $ $ $ .. lol

 

[Borg]

How about an anti-choke , or at least an arti-choke ( which is different from an artsy choke and an artsy bloke )?

Or this?

 

[zoobyshoe]

Dang, I just recognized, that I know what a choke is.

A truly odd post.

What kind of choke are you referring to such that it should surprise you that you know what it is?

 

[fresh_42]

A truly odd post.

What kind of choke are you referring to such that it should surprise you that you know what it is?

The ones used to get a cold combustion engine started.

 

[zoobyshoe]

The ones used to get a cold combustion engine started.

I have one on my Beetle.

Why are you surprised that you know what it is?

 

[fresh_42]

Well, I rarely remember when I last used one. It wouldn't surprise me if the kids nowadays didn't get those engines started. I even know what double clutching is and how it's done.

 

[zoobyshoe]

Well, I rarely remember when I last used one. It wouldn't surprise me if the kids nowadays didn't get those engines started. I even know what double clutching is and how it's done.

It's true that a person would probably not encounter this unless they were working on a car made pre-1975 or so.

On very old cars, the choke was operated manually by pulling on a plunger that was attached by a wire to the choke plate. In newer ones, like my '72 Beetle, the choke was "automatic." It is opened slowly by a heating element that receives current as soon as the car is started. It is designed to open at about the same rate the engine warms up. Regardless, you have to "set" it, to make sure it is in the proper cold position, which is almost, but not completely, closed. You want to choke most of the air off to enrich the gas/air mixture for easy starting, but not all of the air.

Anyway, at first I thought you might be talking about something called a "choke" that might exist in some higher math, like, say, topology, that I wasn't aware of. Or some obscure thing in QM or String Theory.

 

[WWGD]

It's true that a person would probably not encounter this unless they were working on a car made pre-1975 or so.

On very old cars, the choke was operated manually by pulling on a plunger that was attached by a wire to the choke plate. In newer ones, like my '72 Beetle, the choke was "automatic." It is opened slowly by a heating element that receives current as soon as the car is started. It is designed to open at about the same rate the engine warms up. Regardless, you have to "set" it, to make sure it is in the proper cold position, which is almost, but not completely, closed. You want to choke most of the air off to enrich the gas/air mixture for easy starting, but not all of the air.

Anyway, at first I thought you might be talking about something called a "choke" that might exist in some higher math, like, say, topology, that I wasn't aware of. Or some obscure thing in QM or String Theory.

A choke is anything that intends to make you laugh. Obviously , this post is a failed attempt at one. EDIT2: Or, what someone feels like doing to me after reading the first part of this post :).

 

[zoobyshoe]

A choke is anything that intends to make you laugh. Obviously , this post is a failed attempt at one. EDIT2: Or, what someone feels like doing to me after reading the first part of this post :).

Reminds me of the Physics Bondage classic, Shirley! You're Choking Mr. Feynman!

 

[zoobyshoe]

I was backing up to pull out into the street. There was an SUV parked behind me, but I was pretty sure I wasn't going to tap it. All of a sudden I heard a cracking noise, and some smallish object flew apart on the road in front of me to my left. I thought maybe I had impacted the SUV and broken the plastic cover of one of our lights, somehow launching a piece over my car.

But, when I pulled forward to look at the object, it turned out to be a cell phone. I saw no one around and can't figure out where it came from. Someone had thrown it a long way, or maybe it fell out of a plane.

 

[WWGD]

Last night was the first time in my life that someone ( I am pretty sure) was trying to mug me, demanding that I give him money. I just said no and he ultimately walked away. I just responded reflexively, without thinking it much. Maybe not too good of an idea, but I am here.

 

[WWGD]

I was backing up to pull out into the street. There was an SUV parked behind me, but I was pretty sure I wasn't going to tap it. All of a sudden I heard a cracking noise, and some smallish object flew apart on the road in front of me to my left. I thought maybe I had impacted the SUV and broken the plastic cover of one of our lights, somehow launching a piece over my car.

But, when I pulled forward to look at the object, it turned out to be a cell phone. I saw no one around and can't figure out where it came from. Someone had thrown it a long way, or maybe it fell out of a plane.

How could it fall from an airplane if they don't have wndows? Wouldn't it also have cracked into thousands of tiny pieces if that was the case? I'll leave that to the Physics people around here.

 

[collinsmark]

Last night was the first time in my life that someone ( I am pretty sure) was trying to mug me, demanding that I give him money. I just said no and he ultimately walked away. I just responded reflexively, without thinking it much. Maybe not too good of an idea, but I am here.

Oh, my. That's an awful situation to be in.

 

[collinsmark]

I was backing up to pull out into the street. There was an SUV parked behind me, but I was pretty sure I wasn't going to tap it. All of a sudden I heard a cracking noise, and some smallish object flew apart on the road in front of me to my left. I thought maybe I had impacted the SUV and broken the plastic cover of one of our lights, somehow launching a piece over my car.

But, when I pulled forward to look at the object, it turned out to be a cell phone. I saw no one around and can't figure out where it came from. Someone had thrown it a long way, or maybe it fell out of a plane.

How could it fall from an airplane if they don't have wndows? Wouldn't it also have cracked into thousands of tiny pieces if that was the case? I'll leave that to the Physics people around here.

 

[nuuskur]

how did the camera NOT break? :D

 

[fresh_42]

how did the camera NOT break? :D

Spoiler: Att.: Laughing fit very likely.

 

[zoobyshoe]

http://www.cnn.com/2011/TECH/mobile/07/18/iphone.skydive/

http://www.digitaltrends.com/mobile/iphone-falls-2500-feet/

http://www.nbcnews.com/tech/apple/man-finds-iphone-still-working-after-9-300-foot-drop-n401716

 

[nuuskur]

The middle article reads:
“I won’t be taking pictures on a plane beside an open window ever again, that’s for certain!”

Umm, right? I haven't flown in a while. Do they let you open windows now? :O