Author Topic: Fun for nerds (Read 131568 times)

RoGeorge · « **Reply #226 on:** June 18, 2021, 03:40:03 pm »

Quote

"The fact that something has temperature is a reflection of the idea that it interacts with stuff around it," Sudhir says. "And it's harder to isolate larger objects from all the things happening around them."

Source: https://phys.org/news/2021-06-physicists-human-scale-standstill-quantum-state.html

RoGeorge · « **Reply #227 on:** June 19, 2021, 02:39:47 pm »

Individual electrons visualized with a ruler.
https://www.nature.com/articles/s41598-021-89714-2.pdf
https://phys.org/news/2021-06-absorption-individual-electrons-captured-video.html

BU508A · « **Reply #228 on:** June 24, 2021, 01:59:01 pm »

Physicists show that flying beer coasters will flip 0.45 seconds into flight

"University of Bonn physicists were inspired to investigate the aerodynamics of flying beer mats after traveling to Munich with a German physics demonstration show."

https://arstechnica.com/science/2021/06/the-physics-of-why-that-flying-beer-coaster-is-nothing-like-a-frisbee/

RoGeorge · « **Reply #229 on:** June 24, 2021, 07:08:57 pm »

RoGeorge · « **Reply #230 on:** June 25, 2021, 08:46:14 pm »

m-Widar, like a RADAR, but uses many Tx points, sparsity, random patterns, correlation and a post processing technique called transient rendering. Can see you behind walls or indoors at 300+ kiloFPS!

Quote

The transmitting antennas operated at frequencies from 200 megahertz to 10 gigahertz [...]. The receiver consisted of two antennas connected to a signal digitizer. The digitized data were transferred to a laptop computer and uploaded to the graphics processing unit to reconstruct the images.

The NIST team used the method to reconstruct a scene with 1.5 billion samples per second, a corresponding image frame rate of 366 kilohertz (frames per second). [...]

With 12 antennas, the NIST system generated 4096-pixel images, with a resolution of about 10 centimeters across a 10-meter scene.

Source: https://phys.org/news/2021-06-method-radio-image-hidden.html

RoGeorge · « **Reply #231 on:** June 30, 2021, 03:40:35 pm »

Reactive Ion Etching (RIE) for better homemade computer chips

Source: https://hackaday.com/2021/06/29/garage-semiconductor-fab-gets-reactive-ion-etching-upgrade/

T3sl4co1l · « **Reply #232 on:** July 02, 2021, 06:58:50 am »

Damn fine (up and coming?) science channel:

https://www.youtube.com/c/AlphaPhoenixChannel/videos

YT being what it is, I'm shocked I haven't seen this sooner; alas!

Tim

RoGeorge · « **Reply #233 on:** July 04, 2021, 09:18:32 am »

Gold!

BU508A · « **Reply #234 on:** July 12, 2021, 11:38:48 am »

I can't see a problem here.
The topic is saying "Fun for nerds".
So, if someone here is finding this interesting (and having therefore a bit fun), then I'd call it on-topic.

RoGeorge · « **Reply #235 on:** July 12, 2021, 12:16:52 pm »

Quote from: BU508A on July 12, 2021, 11:38:48 am

I can't see a problem here.
The topic is saying "Fun for nerds".
So, if someone here is finding this interesting (and having therefore a bit fun), then I'd call it on-topic.

That's true, but also it would be a slippery slope.
Meanwhile I changed my mind, and deleted my previous offtopic post.