I scraped and plucked them off, not the safest way to get rid of them apparently...

There are some limitations such as:

– TLS termination mandatorily happens at Cloudflare (i.e. your traffic is mitm'ed). That's because this free product is meant as a gateway drug (aka a loss leader) to Cloudflare's WAF/Anti-DDOS products (which require TLS termination to happen on their side for technical reasons).

– Other TCP protocols (including SSH) require every client to run the software too. So if you were thinking about bypassing the TLS termination restriction by creating a TCP tunnel instead of an HTTP(S) tunnel you can't.

– Max 100 MB uploads for HTTP(S).

– No media servers allowed.

Otherwise it's a really good service!

At the start of the video you are looking at a good potion of the whole visible sky. If you look at the very center of the frame, there is Orion, and you can see the three close bright stars together that we zoom in towards are Orion's belt.

The youtube link to a 'zoom' in video to the image:

https://www.youtube.com/watch?v=TkVprNB5XbI

What is really, really neat to notice isn't just the detail in that final image.... look behind it, and there are whole edge-on spiral galaxies in the distance. Not stars. Galaxies.

The nebula is about 1375 light years away. Those galaxies in the distance.... are billions of light years away. It's hard to comprehend.

One of Akiyoshi Kitaoka's recent work that I found absolutely stunning is the following illusion where a ring of one colour appears to be either in front of or behind two rings of another colour:

https://twitter.com/AkiyoshiKitaoka/status/16812686184854568...

https://nitter.net/AkiyoshiKitaoka/status/168126861848545689...

To my perception, the blue ring appears to float above the red rings. It feels a bit like an autostereogram where a 3-dimensional image emerges out of a 2-dimensional image. However, there is no autostereogram in this image and there is no crossing of eyes involved. The 3-dimensional image arises out of an otherwise plain image of differently coloured rings on a dark background.

An analysis of this illusion is available here: http://www.psy.ritsumei.ac.jp/~akitaoka/Kitaoka2015_Referenc...

So lets look at how the refrigeration cycle works here and make some conjectures. If I understand correctly, this kind of system removes heat from one side and moves that heat out the other side. An AC unit with a structure as a barrier is a machine that removes heat from the confined structure and vents it to the outside. So, with enough AC units removing heat from sealed structures and outputting it into the atmosphere, seems plausible that getting enough of them together would behave like a kind of heater.

Now, how did the air inside these structures get warmed up in the first place? Under normal conditions, is the air inside the structures WARMER than the ambient air? Does the structure itself somehow more efficiently harness the suns energy to warm the structure more than the ambient outside air?

If the same energy source is heating the ambient air and the air inside the structures - and it is - its the sun here, don't we have a constant amount of energy warming the area? Some of that energy warms outside, some of it warms inside, but the amount is constant.

So how could a device that removes heat from structures to vent it outside be responsible for a warming of the outside air? Unless the AC itself added some extra heat energy in the process OR the structures somehow more efficiently turned solar energy into heat, how could moving heat around cause a temperature increase?

For example - on a warm day in a little European village, everyone lights a gigantic fire and adds non-solar heat to their homes. The devices that remove the heat would then be adding new energy to constant solar energy heating the town. Ambient temperatures would likely rise. But did the AC cause the temperature increase? Didn't the AC unit just move heat from structure to ambient? The AC added no heat in this case.

You might conclude that the only real option is to buy a positive pressure fresh air system, but this comparison doesn't match my experience. I have no trouble driving the PM2.5 very close to 0 with a few standalone purifiers in my house (verified with a couple air quality monitors) even during bad wildfire smoke events. I'll grant I live in a modern house which is pretty well sealed, but it's also a question of sizing the purifier to the room's size and drafts.

There are some orthogonal advantages and disadvantages though. On the upside, you'll reduce CO2 and other pollutants from inside your house -- it can get quite stuffy when you can't ventilate due to poor outdoor air quality. A downside is that it may also bring in air at a different temperature or humidity than you'd like (though that can also be controlled to some extent with a HRV/ERV.)

I built https://pinggy.io for myself initially. But after some years I thought others might also find it useful.

It gives me "instant" public URLs to localhost without any downloads/configs. I use to to quickly send files, share and check frontend on my mobile device.