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30 Dec 2020 08:36:28 UTC
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Physics of Hiking
Two physics majors go hiking and notice that there's physics everywhere!
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https://www.youtube.com/watch?v=okww7StsUVw
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https://www.youtube.com/watch?v=okww7StsUVw
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video/mp4
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English
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Controlling
VIDEO
DIY F
diy-fire-tornado-the-original-no-moving
How to build a fire tornado machine with no moving parts or screens! It can even be easily constructed with cardboard. Also: why the fire Tornado works, how it makes a vortex and why the flame looks like it's getting taller!
Build one from Cardboard:
https://youtu.be/uNo2lp12Qxk
Cool slow motion footage:
https://youtu.be/6uGrnGSbTSo
Other Links:
Bonfire Tornado:
https://www.youtube.com/watch?v=OL_VUh4gzIk
Tabletop model with rotating screen:
https://www.youtube.com/watch?v=3tZF6-i8aDc
Museum demo with guided draft similar to mine (and maybe also a fan?):
https://www.youtube.com/watch?v=M-V-tNkbsVA
...
https://www.youtube.com/watch?v=tuIokrTZdSU
Transaction
Created
1 year ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
PSYCH
psyche-out-your-opponent-with-leds-(8727
This past spring I attended the FRC North Carolina State Championships and got to talk to a bunch of the teams. If you've never heard of FIRST Robotics, you're in for a real treat, because this competition is AWESOME. (If you haven't seen the hub video for all these interviews, check it out first! https://youtu.be/BycqWYE3Ais)
These teams, thousands of them, have only about 2 months to design, build, and test robots to play a brand new game before the competitions begin, and then their work is put to the test! It would be a lot for any professional engineer, but these kids are still in high school! It's pretty incredible.
This video is the complete pit interview with FIRST Team 8727. Enjoy!
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To join or support team 8727:
https://glitchtwopoint0.wixsite.com/glitch2
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If you're interested in finding a team or attending an event, here's the official team search from FIRST:
https://www.firstinspires.org/team-event-search
And if you want to know more about any specific team (like a link to their website) you can probably find it on Blue Alliance:
https://www.thebluealliance.com/
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This is a world map that shows events and teams. I'm not sure how accurate it is because it doesn't look official, but it's a lot easier to search by eye! (and it also doesn't include the other FIRST programs like FLL and FTC (FRC was featured in the video))
https://frcmap.com/
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If you're looking to help a team as a mentor, volunteer, or sponsor:
https://www.firstinspires.org/support
------------------------------------------------------
Music in this video:
I Dunno by grapes is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/3.0/)
http://ccmixter.org/files/grapes/16626
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https://www.youtube.com/watch?v=swcsh8gyyIQ
Transaction
Created
1 year ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
HOW T
how-to-win-snake-the-unkillable-snake-ai
I watched the CodeBullet Snake AI video on the morning after Thanksgiving and spent WAAAAYY too much time working on an AI of my own. I present to you: Snake, as played algorithmically with Dynamic Hamiltonian Cycle Repair. The snake can never die - like really, actually, literally, can't be killed - it's just a matter of how fast it wins the game…
If you, like me, enjoy watching snakes run around eating apples for hours on end, enjoy this follow-up where I took the median-length game from my best performing algorithm and posted the whole darn thing on YouTube:
https://youtu.be/YqL7bl3I5IE
Check out the other social media for updates and ramblings:
https://www.facebook.com/AlphaPhoenixChannel/
https://twitter.com/Alpha__Phoenix
#Snake #AI #Math
CODE!
https://github.com/BrianHaidet/AlphaPhoenix/tree/master/Snake_AI_(2020a)_DHCR_with_strategy
Snake References:
@Code Bullet
CodeBullet's (Most recent) snake video: https://youtu.be/tjQIO1rqTBE
@johnflux1
John Tapsell's Nokia snake project: https://johnflux.com/2015/05/02/nokia-6110-part-3-algorithms/
Mathworks File Exchange Reference:
A* code originally written by Einar Ueland
https://www.mathworks.com/matlabcentral/fileexchange/56877-astar-algorithm
Actual MATH Papers:
http://mathworld.wolfram.com/GridGraph.html
https://epubs.siam.org/doi/10.1137/0211056
http://www.cs.technion.ac.il/~itai/publications/Algorithms/Hamilton-paths.pdf
https://drops.dagstuhl.de/opus/volltexte/2018/9951/pdf/LIPIcs-ISAAC-2018-3.pdf
https://link.springer.com/chapter/10.1007%2F978-3-642-31770-5_8
https://arxiv.org/pdf/1008.0541v1.pdf
https://arxiv.org/pdf/1707.05994.pdf
https://onlinelibrary-wiley-com.proxy.library.ucsb.edu:9443/doi/pdf/10.1002/%28SICI%291097-0118%28199601%2921%3A1%3C43%3A%3AAID-JGT6%3E3.0.CO%3B2-M
https://www.sciencedirect.com/science/article/abs/pii/002001909090053Z
https://en.wikipedia.org/wiki/Hamiltonian_path_problem#Algorithms
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.23.6765&rep=rep1&type=pdf
http://weber.itn.liu.se/~valpo40/pages/hamtile.pdf
https://www.sciencedirect.com/science/article/pii/S0304397515007719
https://www.sciencedirect.com/science/article/pii/0012365X9500330Y
Other clips in this video:
https://xkcd.com/356/
Morbo "Dooom" (Futurama)
"That's Illegal" meme (Red vs. Blue)
Music in this video:
I Dunno by grapes is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/3.0/)
http://ccmixter.org/files/grapes/16626
...
https://www.youtube.com/watch?v=TOpBcfbAgPg
Transaction
Created
1 year ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
THE P
the-polaris-lapse-part-3-the-photography
I made this star-stabilized looping timelapse centered on Polaris. In this video, I explain the challenges of filming a 24-hour timelapse, and give my solutions to many of these problems for future timelapse-recorders.
In this video:
I dunno
grapes
Creative Commons: Attribution
http://ccmixter.org/files/grapes/16626
...
https://www.youtube.com/watch?v=JBizFlGmLPM
Transaction
Created
1 year ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
HOW T
how-to-convert-kinetic-energy-directly
Do you ever wonder how lasers work? What makes them different from other sources of light? The answer "stimulated emission" is frequently given, but even more important is achieving "population inversion". In this video I try to explain both, starting from ground level (no pun intended). Specifically, I describe the functionality of my cnc CO2 laser cutter.
I also show off a woodblock printing I made using that laser cutter, replicating the graphics from the opening of The Legend of Zelda the Wind Waker. Using watercolor paper, tea, acrylic paint, and water-soluble printing ink, I recreate the prologue for the game.
Be sure to check out the subreddit: https://www.reddit.com/r/TryTryAgain/
Music in this video:
I Dunno by grapes is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/3.0/) http://ccmixter.org/files/grapes/16626
Excerpt from The Legend of Zelda, the Wind Waker opening cutscene, Nintendo
Excerpt from The Legend of Zelda, the Wind Waker: Battle, Koji Kondo, Nintendo
Excerpt from The Legend of Zelda, the Wind Waker: Legendary Hero, Koji Kondo, Nintendo
Excerpt from The Legend of Zelda, the Wind Waker: Dragon Island, Koji Kondo, Nintendo
...
https://www.youtube.com/watch?v=3c6-BqT9AwM
Transaction
Created
1 year ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
THIS
this-robot-swings-like-tarzan-(3737-roto
This past spring I attended the FRC North Carolina State Championships and got to talk to a bunch of the teams. If you've never heard of FIRST Robotics, you're in for a real treat, because this competition is AWESOME. (If you haven't seen the hub video for all these interviews, check it out first! https://youtu.be/BycqWYE3Ais)
These teams, thousands of them, have only about 2 months to design, build, and test robots to play a brand new game before the competitions begin, and then their work is put to the test! It would be a lot for any professional engineer, but these kids are still in high school! It's pretty incredible.
This video is the complete pit interview with FIRST Team 3737. Enjoy!
------------------------------------------------------
To join or support team 3737:
https://rotoraptors.wixsite.com/team3737
------------------------------------------------------
If you're interested in finding a team or attending an event, here's the official team search from FIRST:
https://www.firstinspires.org/team-event-search
And if you want to know more about any specific team (like a link to their website) you can probably find it on Blue Alliance:
https://www.thebluealliance.com/
------------------------------------------------------
This is a world map that shows events and teams. I'm not sure how accurate it is because it doesn't look official, but it's a lot easier to search by eye! (and it also doesn't include the other FIRST programs like FLL and FTC (FRC was featured in the video))
https://frcmap.com/
------------------------------------------------------
If you're looking to help a team as a mentor, volunteer, or sponsor:
https://www.firstinspires.org/support
------------------------------------------------------
Music in this video:
I Dunno by grapes is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/3.0/)
http://ccmixter.org/files/grapes/16626
...
https://www.youtube.com/watch?v=P5bmCEuGGuo
Transaction
Created
1 year ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
RANDO
random-box-preview
I'm working on a random number generator based on background radiation (True quantum-random numbers). This is the circuit working for the first time. Radiation is passing through a Geiger-Muller tube, stopping a counter and displaying the result on a Nixie Tube.
...
https://www.youtube.com/watch?v=dTjmuii5boA
Transaction
Created
1 year ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
IMPRE
impressions-every-exploit-to-break-the
Welcome to my first meta-video! Today we will be taking a break from physical science (It'l be back tomorrow) and entering the realm of computer science, with a YouTube video about impressions and the recommendation algorithm that has a self-referential updating thumbnail that tells you how many people have seen the thumbnail!
I also introduce the "CTR-Watch-Time Product" as a metric for video success, effectively the additional time YouTube expects to retain a viewer by showing them a thumbnail. It's an interesting metric when youtube is behaving normally, and for videos of similar length.
At the end, I go into some detail on the python script that's actually updating this thumbnail all the time. Warning: it's absolutely horrendous code…
#YouTube #Algorithm #CTRWtP
Music etc. in this video:
I Dunno by grapes is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/3.0/)
http://ccmixter.org/files/grapes/16626
Deep Thought - The Hitchhiker's Guide to the Galaxy
Patrick "push it somewhere else" meme - Spongebob Squarepants
Purple Crewmate - Among Us
GlaDOS voice and screenshot - Portal/Portal 2 by Valve
https://commons.wikimedia.org/wiki/File:CSIRO_ScienceImage_2042_A_row_of_computer_servers_in_a_server_rack.jpg
Slack quotes from other YouTubers used with permission
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https://www.youtube.com/watch?v=iGW54Rr87Rg
Transaction
Created
1 year ago
Content Type
Language
video/mp4
English
Controlling
VIDEO
BIG H
big-hexagons-of-ice-2-thermoelectric
A DIY Recipe for Giant Hexagonal Ice Crystals
Episode 3-and-a-half (the final episode) of my series on water ice! In this video I discuss the vapor grown ice crystals with a bit more science, and a lot more timelapses! It's amazing what you can learn aout a physical process when you can photograph it continuously for weeks…
Other videos in this series:
The Sound of Freezing, Explained!
https://youtu.be/Wd_c0A8u3lw
The Sound of Freezing (Bonus Footage)
https://youtu.be/hpzutKRSukw
What is polycrystalline water?
https://youtu.be/g7ONBuVtz-w
A DIY Recipe for Giant Hexagonal Ice Crystals
https://youtu.be/L0SYxpVab6M
Big Hexagons of Ice 2: Thermoelectric Boogaloo
https://youtu.be/VA710QYxEu0
Growing Giant Snowflakes (Timelapse Supercut)
[TBD]
Check out the other social media for updates and ramblings:
https://twitter.com/Alpha__Phoenix
https://www.reddit.com/r/TryItAgain/
Interesting articles for the extra-curious:
J.M. Adams, W. Lewis, The Production of Large Single Crystals of Ice, Rev. Sci. Instrum. 5 (1934) 400–402. doi:10.1063/1.1751759.
T. Shichiri, Faceted ice crystals grown in water without air, J. Cryst. Growth. 187 (1998) 133–137. doi:10.1016/S0022-0248(97)00839-7.
P. Bisson, H. Groenzin, I.L. Barnett, M.J. Shultz, High yield, single crystal ice via the Bridgman method, Rev. Sci. Instrum. 87 (2016) 034103. doi:10.1063/1.4944481.
A. Cahoon, M. Maruyama, J.S. Wettlaufer, Growth-Melt Asymmetry in Crystals and Twelve-Sided Snowflakes, Phys. Rev. Lett. 96 (2006) 255502. doi:10.1103/PhysRevLett.96.255502.
T. Gonda, The Growth of Small Ice Crystals in Gases of High and Low Pressures, C, J. Meteorol. Soc. Japan. Ser. II. 55 (1977) 142–146. doi:10.2151/jmsj1965.55.1_142.
Y. Furukawa, S. Kohata, Temperature dependence of the growth form of negative crystal in an ice single crystal and evaporation kinetics for its surfaces, J. Cryst. Growth. 129 (1993) 571–581. doi:10.1016/0022-0248(93)90493-G.
N.N. Khusnatdinov, V.F. Petrenko, Fast-growth technique for ice single crystals, J. Cryst. Growth. 163 (1996) 420–425. doi:10.1016/0022-0248(95)00980-9.
D. v. d. S. Roos, Rapid Production of Single Crystals of Ice, J. Glaciol. 14 (1975) 325–328. doi:10.3189/s0022143000021808.
#Materials #Physics #Crystals
Music and images in this video:
I Dunno by grapes is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/3.0/)
http://ccmixter.org/files/grapes/16626
Arcadia - Wonders by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100326 Artist: http://incompetech.com/
https://en.wikipedia.org/wiki/Snowflake#/media/File:Snowflake_macro_photography_1.jpg
...
https://www.youtube.com/watch?v=VA710QYxEu0
Transaction
Created
1 year ago
Content Type
Language
video/mp4
English