2022.01.18 01:26 pyrotek1 Xtool D1 riser foot STL
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2022.01.18 01:26 tsniit Can Complex wave equation represent a Helix?
Dear Dr Grant Sanderson
I can't adequately express the joy I got from your site.
I am a 71 years old physics teacher.
I wanted to check with you the following:
I imagine Y= A.exp(iwt) is actually a 3D wave ( a cylindrical helix) propagating along the "time" axis with A ( the "amplitude") as the radius of the imaginary cylinder on which the helix is evolving.
It should be very simple to simulate this I guess. I also did it with my students in MatLab.
If you write it in the following way : Y= A( Cos (wt) + iSin(wt) ), Euler's form, then it says if you combine a Cosine wave along X-T plane and Sine wave along Y-T plane you get a 3D helical wave along T- axis! Because 'i' for you and me is a 90 degree rotating operator! Thus a cylindrical helix can be generated by combining these two waves. There are many simulations available which show this already. example:
https://www.youtube.com/watch?v=IFaliBPD1UY at timestamp 11.50
We can go one step further and say:
Y= A exp( i(wt-kz)) also represents in 3D a cylindrical helix where w is the frequency of rotation and k is the wave vector ( 2pi/lamda) as in the usual manner.
Hence I feel the "wave function" of quantum mechanics is only saying that fundamental particles such as electrons are moving along cylindrical helices and the helix is a 3D wave! ( Maybe crazy!)
We were not taught about 3D waves. Everyone everywhere talks only about 2D waves. Thus entire quantum mechanics may be built with the idea of this 3D wave of fundamental particles.
Let me throw out another concept:
A helix is a geodesic on a cylinder! That means, on a cylinder if I choose two points A and B parallel to the axis, and if we find the shortest path between these two points ( using calculus of variations Euler Lagrange equations) it will result in a family of helices! Each helix after leaving point A reaches B after 0,1,2,3,.... rotations around the cylinder before reaching B! This is similar to the "modes"of strings fixed at two ends. As a matter of fact, we can simulate "standing waves" by making two helical waves Y1 =A exp(i(wt-kz)) and another Y2=A exp(-i(wt-kx)) superpose! They are two helices having CCW (counter clockwise) and CW (clockwise) rotations!
This also can be simulated easily.
This corresponds to a particle in a box type of a problem in quantum mechanics!There are only quantized paths available with definite w ( frequency and hence energy) and k( momentum in terms of wave vector).
That is my interest. Do you think you can help me simulate some of these with your expertise?
Waiting for your response.
Best wishes and regards
Phone: +91 9962609753
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2022.01.18 01:26 SugarCherry21 My bending vibrator fits right between my toes
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2022.01.18 01:26 CatSushiSquid Haha funny haha
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2022.01.18 01:26 Jomurphy27 Need help reconfiguring company email
I know this question is probably not exactly made for this sub but I wasn't sure where else to try. I am helping out a company setting up their online presence and day to day ops since their last person left, everything was routed to that persons "email@example.com" email that is attached to a web host through outlook. is it possible to change that email to something more generic like "Admin@company.com" or do I have to set up a new user in outlook and forward everything from the old email. any help is appreciated
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2022.01.18 01:26 superjudy1 First Movie
Hi there! I’m new to this sub but excited to be here.
In our AJLT universe did the first movie happen? It just feels like Carrie or Charlotte would have brought up Steve’s cheating in response to what Miranda is doing with Che. During the picnic was a perfect time for one of them to ask Miranda to remember how she felt when Steve did that to her.
Curious to hear everyone’s thoughts!
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2022.01.18 01:26 noahkun666 shops open?
2022.01.18 01:26 Depleted_Uranium_235 SYSTEM ERROR 5
2022.01.18 01:26 TheGkey08 Whats something odd about your life that you thought was totally normal, and how did you find out otherwise?
2022.01.18 01:26 rolling_thunder1 What do you consider lategame
2022.01.18 01:26 CheersToYourFears Why can’t I let go of my DA ex. I am going crazy. Help!
I’ve been in the anxious/avoidant dance with my DA ex for almost four years now. We have on periods ranging from a week to 4 months and have had off periods ranging from a couple weeks to 1.5 years.
I have read so much literature on attachment styles and have watched almost all the videos from Thais Gibson, Alan Robarge, The Crappy Childhood Fairy, and Brianna Mac Williams, and have listened to almost every episode of the podcast Freedom From Attachment.
I’ve been in therapy for years and am trying to constantly improve myself. I’m managing my depression and CPTSD symptoms, but I still get periods of major anxiety. I have my dream job and pretty supportive friends. So overall my life is pretty good and I think I have pretty good self esteem.
I know rationally that this guy is no good for me and we keep triggering each other. I know I deserve more and deserve a loving relationship with someone who chooses me every day. He has little to no awareness of attachment theory and is not aware of his role that he plays in our dynamic.
I know that we are probably trauma bonded at this point and he mirrors the attachment that I had with my parents. I always had to work for my parents affection and it’s the same in this relationship.
I know I need to let go but I feel stuck. I am FA leaning primarily anxious in this relationship. I wish I could just deactivate.
We just met up for coffee tonight and I asked him if he could see us getting back together. He said that he doesn’t think it would be a good idea and it would be unfair for me since I am going through so much turmoil. I asked him to tell me that we will never get back together again so I can move on. (I know that this is giving him too much power, but I feel like if I still have hope I don’t have the willpower to let go). He told me that he can’t tell me and we may get back together in the future but he doesn’t know.
My body craves him so much.
I’ve left a physically abusive relationship with a narcissist before but it feels 100x harder to leave this relationship for good. When we had 1.5 years of no contact I thought I was 100% over him but I let myself get sucked in again. I feel stuck in the fantasy of things being able to work out if only I said the right things or acted in the right ways.
Why do I put myself through this torture? I feel like every time we break up a bit of my soul dies. I feel crazy for rationally knowing that we are no good for each other, but still wanting so bad for it to work out. What is holding me back?
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2022.01.18 01:26 lrdragon-f I have been researching and don’t know where to start on my freshwater journey. Please help.
I have many more questions and am seeking general guidance. I’m thinking about a 5-15 gallon to start. I would like to aquascape and include snails, shrimp, and fish… Is it possible to mimic an ecosystem (i think that’s the right terminology). Can I achieve this without supplies like a filter? Should I purchase a tank first? Where should I purchase supplies from? Where should I order plants, soil, sand, fish, shrimp, snails from? Should I be concerned about chemicals that may be on/in plants, would I have to search for organic? Please excuse my messy writing format.
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2022.01.18 01:26 AbbaAltmer Roscrea: Lore?
Something I've been looking into all over recently was some stuff regarding Roscrea. I know it's mentioned in disaster at Ionith, Pocket Guide to the Empire, ect, but I'm curious what exactly is going to be done about the lore with it? I checked out the page and it looks 'Skyrim-y', so I'm going to assume they're going with a more Nordic approach than, say, an Akaviri one, but I'm still curious with so little actual resources on the island, what the angle is gonna be. Most of the Beyond Skyrim locales are pretty drastically different from one another and distinct- but Roscrea is sort of interesting and an oddity. Is there a Roscrea dev who's involved with the writing who can shed more light?
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2022.01.18 01:26 bot_neen ¿Vacunarse o NO? Polémica o irresponsabilidad. Una perspectiva financiera
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2022.01.18 01:26 141_1337 Can we talk about how crazy the Banished weapons are on Halo
They are legitimately using anti-vehicle weapons on an infantry role, time to move aside Bolter 👀:
Here is the shock rifle vs Broadsword:
John saw twelve Jiralhanae go down in half as many seconds. But there were also more willing to exchange fire, and a trio managed to score shock rifle hits on a low-flying Broadsword. The EMP took down its shielding, and the electrolasers gouged long slashes through both wings and the skin of its fuselage. The wounded craft pulled up early and wobbled out of sight over the basin rim.Here is the Ravager vs a Broadsword:
Halo: Shadows of Reach
But they were not fuel-rod guns. Not even close.Here is the Ravager sending a 1 ton Brute flying with a single bolt:
The weapons were now firing some sort of red plasma incendiary that had a shallow ballistic arc. One of the incendiaries hit a Broadsword, exploding across the entire wing and into the fuselage. Within a second, the skin began melting away in flames, then the entire craft was disintegrating as the frame burned. Whatever these new weapons were, John hoped none of them made it into the access shaft.
Halo: Shadows of Reach
Castor fired a second bolt into the charging mob, and a Banished warrior erupted in flame and flew backward.Here is the Ravager taking out a Phantom:
Halo: Divine Wind
They were taking out the skewers because those big tank-busting spikes in the barrels could bring down the shields and punch through the titanium shell of even GEN3 MJOLNIR.Here is the Skewer taking out a Phantom:
Halo: Shadows of Reach
2022.01.18 01:26 Zazen420 space ocean moonscape
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2022.01.18 01:26 NE_3-ATL_28 Sodomite freak
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2022.01.18 01:26 Bonus1Fact Over 40% of Finnish Population Against #NATO Membership, Poll Shows
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2022.01.18 01:26 Tile_Stain Anyone selling this in a size L? Or medium? heard it’s very oversized
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2022.01.18 01:26 erixalune Would you rather lick your way along my smooth arch, across my sweet wrinkles, or just go right for my cute toesies?😏😘
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2022.01.18 01:26 cookies_curls Color pairing with mulled wine?
2022.01.18 01:26 Affectionate-Mall205 Looking for sugar mama.
2022.01.18 01:26 RickyOzzy Furious moment Covid doomsayer Ray Hadley confronts Dominic Perrottet for 'calling him a BEDWETTER'
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2022.01.18 01:26 Peagamer13 The finale, The darkness
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2022.01.18 01:26 Lemonofthedeads Monkeys favorite desserts.
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