Name: Live Stream #176: Simple 2D Black Hole Simulation and NeuroEvolution with TensorFlow.js
Uploaded: 2020-03-27T20:30:19.000Z
Duration: 3 h 35 min 27 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

Hello and welcome to the coding train with Whoa, That was like I had my finger over this little air hole here and I got a higher pitch sound Amazing science.

My name is Daniel Schiffman, and I'll be your host this morning on a Wednesday, which is every Wednesday.

I will say thank you for being here at this regularly scheduled time.

I have been so consistent about this, even I'm amazing myself.

However, I will report to you that there will be no live stream next Wednesday.

I have a trip plan to got some stuff going on.

Underneath here in my coding train oven is cooking a whole set of videos about working with data and AP eyes that you I have not seen yet because I have been recording a bunch of videos, not during a live stream as an experiment.

If you want to join the coding train as a patron or YouTube member, you get some sneak previews of that stuff.

Brilliant dot org's Who is the sponsor of today's live stream?

On brilliant dot org's home page, you will see a challenge about relativity.

We also have the term special relativity.

Oh, my goodness, my mind since last Wednesday, I think, was last Wednesday, right when the first image of the black hole came out has just exploded with wonder and awe at the universe we live in.

And I've been spending a lot of time reading some papers, watching some YouTube videos.

I do not have a background in that, but I have been sent down.

I was gonna say Rabbit hole, but I think the appropriate term here would be many black holes not emerged.

By the way, Once you're in it, there's no way to get out.

But that's what I want to do in the first segment of today.

So the first segment today, I'm gonna talk a little bit about the recent black hole image and do a very crude kind of nature of code style physics, simulation of light approaching a black hole, but I will be using Newtonian physics until won't actually be accurate.

But I will talk about, um, what's missing there and a little bit about relativity and then kind of like posed that as a challenge to you to think about it.

Maybe next week, after I've had more time to read these papers and crunch some of these numbers, maybe I could come back and make it more accurate or or or such the sound.

So then segment two of today's Lifestream.

I have a plan and everything, and I'm sure it will go haywire.

I'll be stuck in the black hole for four hours and never get to the next part.

But this is my plan segment to I am going to program the data structure a stack and look at a quiz that's actually if you go to brilliant dot org's slash coating train right now, it'll take you to a page, which is a quiz on stacks, and there's also a quiz on cues.

And this is part of some new computer science course materials that brilliant has, which has been really terrific for me to review a lot of the stuff that maybe I did 15 years ago.

So it's wonderful for both kind of continuing education for me, like I can, like, look at this stuff again or, uh, very well what I was saying on the slack chat this morning in the coding train patron group that the last time I think I had to implement a stack like actually implemented without just using a kind of using an array as a stand in for a stack or or some other stack from a library was probably 15 years.

So I'm gonna have to do that today and look, ATT.

Programming my own stack data structure in the context of that quiz and kind of leave that as a challenge for you to take the quiz on Dhe.

Then pending time, I will have to say that it is in the title of this video, which I probably shouldn't have put it there, but at a minimum I will show you some new examples that I'm working on that do neuro evolution with tensorflow Js.

I would love to do a coding challenge around that that might come the next time.

But at a minimum, I do have a few, like finished examples that are basically ports of some of my previous examples.

There's a steering of steering one and a flappy bird one that I will show you, Huh?

You didn't ask me to, like, say, this dot and dab or something.

Give me your instructions and I will entertain you.

I think we could just get started, right?

What else do I don't have anything else to say in my introduction?

I'm, like, efficient and organized like a professional YouTube live streamer person.

Now it's It links Aaron this video's description.

So I want to mention a couple things I think let me Just find it.

Okay, so I want to talk about two things.

One, I want to mention a huge thank you to Chris Orban and stem coding.

Chris Orban, from Ohio State University runs a wonderful YouTube channel called stem coating with a lot of P five gs and other coating activities themed around physics.

With really science like me, I do my like I don't really understand it, but let me I've been trying clicking this into this plague in this baby.

But you've got an actual You've got science people in their PhD students and graduate students.

Wonderful, diverse array of presenters on that channel.

So I highly recommend you check that out.

The reason why I'm thanking Chris in particular is Chris wrote up this wonderful guide, which I just it's actually called simulating a black hole.

The one of the coding challenges on the stem coating YouTube channel is a coding challenge called slingshot with gravity, and it's very similar to some examples I have in the nature of code book about looking at gravitational attraction and simulating that in a two D world using Oiler integration and kind of simple I don't want amusing.

Using some basically X equals X plus speed kind of code thio simulate how bodies interact with gravity.

So, Chris, uh, modified the code two kind of talk about black holes a little bit and there's some nice information in here and a lot of explanation.

Really nice formula here, which I will talk about for the radius of the event.

I was like trying to think How do you pronounce that?

I think shorts shields very hard to say it like it's under mister.

I'm gonna come back to this when I do the video, but so I also wanted to just plug if you are a teacher.

Ah, wonderful thing that is happening this summer is called the Pathfinder Summer Institute, which is a professional development in computer science and making at Indiana University Bloomington from July 14th 2/19.

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Live Stream #176: Simple 2D Black Hole Simulation and NeuroEvolution with TensorFlow.js

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