Wikipedia:Reference desk/Archives/Science/2015 July 16

= July 16 =

What's the name of this rock formation
Please, what's the name of this kind of rock formation ?



As far as I understand, it works almost like a stalagmite/tite, but water/sediments come from the inside, no ?! Thanks in advance. Blump007 (talk) 04:35, 16 July 2015 (UTC)
 * It's called a flowstone. -- Jayron 32 04:36, 16 July 2015 (UTC)
 * Thanks. I previously searched flowstones but they seem to be only inside (caves), don't they ? Blump007 (talk) 04:40, 16 July 2015 (UTC)
 * Not necessarily. Travertine is a common flowstone that is found deposited at the surface.  The only requirement for forming flowstone is mineral-rich waters that flow over the same area slowly for very long periods of time, to allow for precipitation and lithification of the minerals.  They are often found in caves because the environment of a cave is often left undisturbed for millennia, but they can form in other environments. -- Jayron 32 04:48, 16 July 2015 (UTC)

Thanks a lot, that's very informative (+ I added the name of the one pictured) Blump007 (talk) 05:43, 16 July 2015 (UTC)


 * Thanks for uploading this unusual image to Commons. But please - can you confirm for the description that it was taken in Thermopolis, Wyoming, and when it was taken?  We ought to illustrate that article with this photo.  I can almost, but perhaps not quite, confirm it is the same one from something like . Wnt (talk) 15:03, 16 July 2015 (UTC)


 * This is the official website of Hot Springs State Park in Thermopolis, and has pictures of the above formation as well. -- Jayron 32 00:51, 17 July 2015 (UTC)

Does ESP8266 has an hardware AES engine or not?
ESP8266 is a popular wifi-enabled SoC. I'm trying to figure out whether it has a hardware accelerated AES engine or not.

Evidence point to YES:

1. Googling "ESP8266 AES engine" yields dozens of sites saying the affirmative, though most of them likely just copy and pasted that information from somewhere else.

2. ESP8266 contains an ARM Cortex-M4 core. Googling "Cortex-M4 aes" suggests that most manufacturers pair a hardware AES engine with their Cortex-M4 SoCs, so it's likely that ESP8266's manufacturer has done the same.

Evidence point to NO:

1. This reposity contains a purely software implementation of AES, would seems to suggest that there's no hardware AES engine, at least not one that's available to the user. My other car is a cadr (talk) 14:07, 16 July 2015 (UTC)
 * This might be better answered at Reference_desk/Computing. shoy (reactions) 14:28, 17 July 2015 (UTC)
 * Thanks. Moved.My other car is a cadr (talk) 03:14, 18 July 2015 (UTC)