Posts: 35800
Threads: 207
Joined: August 13, 2012
Reputation:
146
RE: What's everyone up to right now?
May 22, 2017 at 3:55 pm
So, apparently I'm a closet blonde.
I bought a new battery for my car and put it on to charge.
This was mistake one as apparently they're already fully charged.
When I took it off charge a realised I had put the charger cables over the protective plastic pieces that sit over the connector part of the battery.
That was mistake two.
One more for a hat trick!
Playing Cluedo with my mum while I was at Uni:
"You did WHAT? With WHO? WHERE???"
Posts: 1092
Threads: 26
Joined: September 5, 2016
Reputation:
38
RE: What's everyone up to right now?
May 22, 2017 at 4:11 pm
(This post was last modified: May 22, 2017 at 4:14 pm by Kernel Sohcahtoa.)
(May 22, 2017 at 1:22 am)Alex K Wrote: (May 22, 2017 at 12:20 am)Kernel Sohcahtoa Wrote: I'm wrapping my head around the idea of simplifying the first order PDE aux+buy+cu=f(x,y) (1) (where u=u(x,y); a^2+b^2>0) into the simpler form of aux(x,y)+ cu(x,y)=f(x,y) via a change of variables (coordinates).
Is that like a rotation in the xy-Plane?
Pretty much. Basically, aux+buy is the derivative of u(x,y) in the direction of the vector ai+bj. Hence, introducing a new coordinate system, say v(w,z)=u(x,y) in the xy plane, allows us to take the characteristic lines of aux+buy (of slope b/a), which are bx-ay=d, and set w equal to bx-ay or w=bx-ay. From here we define y=z, and x= (w+az)/b. Subbing these values into aux+buy gives a(VwWx+VzZx) + b(VwWy+VzZy) (2). Now, keeping Vw and Vz fixed, we get the following partial derivatives: Wx=b; Zx=0; Wy=-a; zy=1. Plugging these partial derivatives into (2) gives a(Vw(b)+Vz(0)) + b(Vw(-a) + Vz(1))=abVw - abVw+bVz=bVz. Now, plugging in aux+buy=bVz and u=v into (1) gives bVz+cv=f(w+az)/b, z).
Posts: 19669
Threads: 178
Joined: July 31, 2012
Reputation:
91
RE: What's everyone up to right now?
May 22, 2017 at 4:11 pm
(May 22, 2017 at 3:55 pm)The Valkyrie Wrote: So, apparently I'm a closet blonde.
I bought a new battery for my car and put it on to charge.
This was mistake one as apparently they're already fully charged.
When I took it off charge a realised I had put the charger cables over the protective plastic pieces that sit over the connector part of the battery.
That was mistake two.
One more for a hat trick!
Get on a plane and meet me in Portugal. 
Posts: 35800
Threads: 207
Joined: August 13, 2012
Reputation:
146
RE: What's everyone up to right now?
May 22, 2017 at 4:22 pm
(May 22, 2017 at 4:11 pm)pocaracas Wrote: (May 22, 2017 at 3:55 pm)The Valkyrie Wrote: So, apparently I'm a closet blonde.
I bought a new battery for my car and put it on to charge.
This was mistake one as apparently they're already fully charged.
When I took it off charge a realised I had put the charger cables over the protective plastic pieces that sit over the connector part of the battery.
That was mistake two.
One more for a hat trick!
Get on a plane and meet me in Portugal.
The plane would probably explode...
Playing Cluedo with my mum while I was at Uni:
"You did WHAT? With WHO? WHERE???"
Posts: 19669
Threads: 178
Joined: July 31, 2012
Reputation:
91
RE: What's everyone up to right now?
May 22, 2017 at 4:29 pm
(May 22, 2017 at 4:22 pm)The Valkyrie Wrote: (May 22, 2017 at 4:11 pm)pocaracas Wrote: Get on a plane and meet me in Portugal.
The plane would probably explode...
Only one way to find out. 
Posts: 15351
Threads: 118
Joined: January 13, 2014
Reputation:
116
RE: What's everyone up to right now?
May 22, 2017 at 4:29 pm
(May 22, 2017 at 3:55 pm)The Valkyrie Wrote: So, apparently I'm a closet blonde.
I bought a new battery for my car and put it on to charge.
This was mistake one as apparently they're already fully charged.
When I took it off charge a realised I had put the charger cables over the protective plastic pieces that sit over the connector part of the battery.
That was mistake two.
One more for a hat trick!
Wow. There's so much fail there. Good thing you're puuurdy.
"There remain four irreducible objections to religious faith: that it wholly misrepresents the origins of man and the cosmos, that because of this original error it manages to combine the maximum servility with the maximum of solipsism, that it is both the result and the cause of dangerous sexual repression, and that it is ultimately grounded on wish-thinking." ~Christopher Hitchens, god is not Great
PM me your email address to join the Slack chat! I'll give you a taco(or five) if you join! --->There's an app and everything!<---
Posts: 10470
Threads: 165
Joined: May 29, 2013
Reputation:
53
RE: What's everyone up to right now?
May 22, 2017 at 4:35 pm
*kind of wants to see Valk as an actual blonde*
"For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring." - Carl Sagan
Posts: 35800
Threads: 207
Joined: August 13, 2012
Reputation:
146
RE: What's everyone up to right now?
May 22, 2017 at 4:37 pm
(May 22, 2017 at 4:29 pm)pocaracas Wrote: (May 22, 2017 at 4:22 pm)The Valkyrie Wrote: The plane would probably explode...
Only one way to find out.
I'm flying to Melbourne in a few weeks.
That will be risky enough...
Playing Cluedo with my mum while I was at Uni:
"You did WHAT? With WHO? WHERE???"
Posts: 10470
Threads: 165
Joined: May 29, 2013
Reputation:
53
RE: What's everyone up to right now?
May 22, 2017 at 4:37 pm
Watching a video of Landon Donovan introducing a supporters group for the hypothetical San Diego expansion team in MLS.
"For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring." - Carl Sagan
Posts: 35800
Threads: 207
Joined: August 13, 2012
Reputation:
146
RE: What's everyone up to right now?
May 22, 2017 at 4:38 pm
(May 22, 2017 at 4:29 pm)SteelCurtain Wrote: (May 22, 2017 at 3:55 pm)The Valkyrie Wrote: So, apparently I'm a closet blonde.
I bought a new battery for my car and put it on to charge.
This was mistake one as apparently they're already fully charged.
When I took it off charge a realised I had put the charger cables over the protective plastic pieces that sit over the connector part of the battery.
That was mistake two.
One more for a hat trick!
Wow. There's so much fail there. Good thing you're puuurdy.
I just can't believe that I could be that idiotic.
Oh, well.
Luckily I'm good at what I do.
Playing Cluedo with my mum while I was at Uni:
"You did WHAT? With WHO? WHERE???"
|
