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David Moore

Attends San Diego Miramar College

Lives in San Diego, CA

192 followers|95,452 views

AboutPostsPhotosVideos

People

In his circles

79 people

Education

- San Diego Miramar College2011 - present

Basic Information

Gender

Male

Birthday

March 19, 1994

Links

YouTube

Other profiles

Story

Tagline

Aspiring physicist

Introduction

I'm a student who would love to go into high-level academia. See my portfolio and my youtube channel for some projects I've worked on.

I started programming at the age of 11, and now I'm studying physics and some pure math at the level of real analysis, introductory computational physics, and introductory dynamics (Lagrangians and what-not). I do all this on my free time, but I have very little going for me academically, being in community college, with my only STEM classes being introductory linear algebra and vector calculus (old news!)

If you have project recommendations, book recommendations, or anything really, I'd love to hear them!

Bragging rights

Pretty fluent with Java/C++ (Yes really!)/JS/DBPro/Mathematica

Places

Currently

San Diego, CA

Contact Information

Work

- dmoore101@gmx.com
| |

Animated gif!

Polyhedra from orbits of the icosahedral group. Every frame in every polyhedron here has icosahedral rotational symmetry. That's group of size 60, so in general the solids here have 60 vertices. Plotted are some polyhedra with 60/1=60 vertices (truncated icosahedron), 60/2=30 vertices (Icosidodecahedron), 60/3=20 vertices (dodecahedron), 60/5=12 vertices (icosahedron). I take an arbitrary point, hit it with the group action, and plot its convex hull. The numbers 1, 2, 3, 5, are orders of stabilizer groups of special points, and in this case they let you know the number of vertices of each solid without actually counting them

Polyhedra from orbits of the icosahedral group. Every frame in every polyhedron here has icosahedral rotational symmetry. That's group of size 60, so in general the solids here have 60 vertices. Plotted are some polyhedra with 60/1=60 vertices (truncated icosahedron), 60/2=30 vertices (Icosidodecahedron), 60/3=20 vertices (dodecahedron), 60/5=12 vertices (icosahedron). I take an arbitrary point, hit it with the group action, and plot its convex hull. The numbers 1, 2, 3, 5, are orders of stabilizer groups of special points, and in this case they let you know the number of vertices of each solid without actually counting them

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5 comments

+David Moore Thanks... I remembered searching for it a few years ago and the result wasn't fruitful - I must've searched for the wrong thing.

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New post on a fun exercise with linearization! http://mathandcode.com/2015/09/02/delaunay.html

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A single point in space can spin continuously without becoming tangled. It returns to its original configuration after spinning 720 degrees.

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+Owen Maresh +\infty. Needs to be made

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One Picture in 16 Versions

Today: Version 2 and 3. This is Version 3.

Today: Version 2 and 3. This is Version 3.

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Made a fun app based on the stereographic projection of an icosahedron with circles for faces based off of a fun circle animation that I saw on google+.

https://www.khanacademy.org/computer-programming/stereographic-projection-of-an-icosahedron-with-circles-for-faces/6309857876639744

https://www.khanacademy.org/computer-programming/stereographic-projection-of-an-icosahedron-with-circles-for-faces/6309857876639744

4 photos

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Hi +Dan Piponi , I'm getting ready for free-time summer projects after the quarter ends. I think a fun project would be writing computer verified proofs of some of what's in Euclid's elements. I remember you posting a little bit on computer verified proofs a while back (maybe what I'm remembering is this post https://plus.google.com/+DanPiponi/posts/G1HJcVzk3oU ). Any ideas on this project and whether it sounds interesting or not? Thanks!

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+John Baez wow, I had never heard about Tarski's axioms. I had found a source for Hilbert's axioms on the metamath proof explorer (can't find it, now, but I can find this http://us.metamath.org/mpegif/mmtheorems175.html#mm17494s ) but I'm not exactly sure if metamath is the best way to go about it. Mostly it's the implementation that's bugging me! Ex., wolfram a new kind of science has a list of axioms for euclidean plane geometry ( http://www.wolframscience.com/nksonline/page-774 ) but I'm finding it very difficult to actually get to an implementation!

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In his circles

79 people

Here's an idea of how an electron gun works

http://mathandcode.com/2015/09/04/electrongun.html

You might work with an electron gun in a first year college physics lab course*, and find that it has all sorts of knobs/variables. The two most important are the gun voltage, and the grid voltage. Here, the gun voltage is held constant, and you can build your own cylinders and disks at gun or grid voltage however you please! This article shows you how to use the simulation to build a focused electron beam.

*the experiment I'm thinking of is one you can use to find the electron charge:mass ratio. A google search for "electron charge to mass ratio lab electron gun" brings up lots of relevant results/sample labs.

http://mathandcode.com/2015/09/04/electrongun.html

You might work with an electron gun in a first year college physics lab course*, and find that it has all sorts of knobs/variables. The two most important are the gun voltage, and the grid voltage. Here, the gun voltage is held constant, and you can build your own cylinders and disks at gun or grid voltage however you please! This article shows you how to use the simulation to build a focused electron beam.

*the experiment I'm thinking of is one you can use to find the electron charge:mass ratio. A google search for "electron charge to mass ratio lab electron gun" brings up lots of relevant results/sample labs.

The following post explains the electron gun app here andguides you through using it to build an electron gun. The simulation assumes cylindrical symmetry ab...

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Here's an idea of how an electron gun works

http://mathandcode.com/2015/09/04/electrongun.html

You might work with an electron gun in a first year college lab course, and find that it has all sorts of knobs/variables. The two most important are the gun voltage, and the grid voltage. Here, the gun voltage is held constant, and you can build your own cylinders and disks at gun or grid voltage however you please! This article shows you how to use the simulation to build a focused electron beam.

http://mathandcode.com/2015/09/04/electrongun.html

You might work with an electron gun in a first year college lab course, and find that it has all sorts of knobs/variables. The two most important are the gun voltage, and the grid voltage. Here, the gun voltage is held constant, and you can build your own cylinders and disks at gun or grid voltage however you please! This article shows you how to use the simulation to build a focused electron beam.

The following post explains the electron gun app here andguides you through using it to build an electron gun. The simulation assumes cylindrical symmetry ab...

1

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Time travel! Made this animation to explain why, if you allow instantaneous communication in two frames, you allow time travel and all its paradoxes.There are also static versions, so you don't get dizzy trying to understand what's going on. http://physics.stackexchange.com/questions/203708/can-ftl-communication-between-two-points-in-the-same-frame-of-reference-break-ca/203748

3 photos

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Just uploaded/finalized a fun fractal thing http://mathandcode.com/2015/08/31/dejong.html

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The Math Institute of Toulouse accepted to fund my project : they bought the 3D models. This include the set I showed earlier, plus another set I proposed, and the total amounts to approx 1250€, taxes included. I paid for the rest: the paint, wood boards, plastic straws, neodyme magnets, glue and varnish. All the tools are mine. Now I am spending part of my summer carefully painting the models, this is taking forever. I also assembled stands for the second set, this was faster and more pleasant to do.

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“I am a phd-student in neuroscience and I often get the impression that in physics "everything is better". E.g. they replicate their stuff, they care about precision, etc. I've always wondered to what extend that is actually true, as I obviously don't know ...

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