This misses the NVIDIA Jetson/Orin/Thor line of GPU-enabled edge computers which are more comparable with Raspberry Pis. The Jetson Orin Nano Super is $250. Another feature which we find useful is the native NVMe drive support. For the price, this blows RPis out of the water for imaging applications.
A friend and I found a contractor to give us a couple of these lights in the Phoenix area. We traced the LEDs back to a Seoul Semiconductor Phosphor on-chip design. We still have a suspicion that LM80 testing didn’t catch this and it was due to a thermal cycling failure. https://m.youtube.com/watch?v=4Mll-YDDAF4
I had that same thought. I travel a bunch for work and would love to be able to wire up a RPi/Arduino remotely to a sensor or other device and run a test or two.
Dr. Levenspiel came up in another thread about elephant curves. He tried for many years to get this article published on the aerodynamics of dinosaurs and how this might reflect on atmospheric pressure at the time. There is a long list included of rejections from various scientific publications in the 90s. Seemed fitting for Hacker News.
I have to plug Dr Octave Levenspiel. Levenspiel was a professor emeritus when I did my undergrad. He did much of the work on industrial fluidized beds among other things. The elephant curve discussions were a criticism of the complex multi-parameter fitting for heterogenous catalysis of the time. https://levenspiel.com/elephants/
"A study published in 2007 from the US National Cancer Institute, for instance, found that men that took multivitamins were twice as likely to die from prostate cancer compared to those who didn’t. And in 2011, a similar study on 35,533 healthy men found that vitamin E and selenium supplementation increased prostate cancer by 17%."
They do cite quite a few articles that show negative effects of specific vitamins.
Could be neat if they become the defacto way to launch and sell opensource hardware. I'd be interested to see if that pencils out as a viable/scalable business.
LoRa is a really cool technology. We are incorporating it into our networking stack/ hardware module. From field testing, we've seen about 4-6 miles line of sight, and about a mile through an urban environment (parking garage, apartment building, etc). Plus the bare radio chips are less than $10 bucks.
Try out Low Power Labs Monteino with the HopeRF, RFM95 LoRa module. The radio library is lacking but you can get up and running quickly. https://lowpowerlab.com
If you want something a little more enterprisy and turn-key, try the new guys (I work for them). The Patch module has both a BLE and LoRa radio. https://www.filament.com
"Filament looks really interesting. It would be possible to dismiss this fledgling business as a hodgepodge of buzzwords, but the credibility of its investor pool, the novel approach it seems to be taking to the problem, and the very real opportunity that exists for IoT networks all combine to make this an interesting play."
"To build its technology, Filament is using a series of protocols that include the blockchain transaction database behind Bitcoin; BitTorrent, the popular peer-to-peer file sharing software; Jose, a contract management protocol that is also used in the OAuth authentication service that lets people use their Facebook ID to log in and manage permissions to other sites around the web; TMesh, a long-range mesh networking technology and Telehash for private messaging."
It looks like the powder is made by a physical process. Just as water absorbs into a towel. Ethanol apparently absorbs into dextrin powder and stays as a dry solid.
From the patent:
EXAMPLE II A 150 g. amount of the bulked 5 DE. MOR-REX dextrin of Example I was blended with 250 g. of 90% by weight water) ethanol in a Hobart mixer at speed No. 2 with a wire whisk for 2 minutes. A dry-tothe-touch free flowing powder was obtained that contained 56.2% ethanol and 8.3% moisture. The bulked ethanol containing flowable powder was packaged in air-tight foil envelopes and after 6 months storage had retained its flowability characteristics and its original alcohol content.
EXAMPLE III A teaspoonful (3 g.) of the product of Example II, when added to 10 ml. of water produced a clear, sparkling low-viscosity alcoholic solution with a nonsweet strong alcohol taste.
I noticed that Eastern Nevada has one of the highest mobility rates according to this study. This surprises me. That side of the state is one of the least populated areas and the most desolate. I wonder if there is a statistical bias at work here.
https://www.nvidia.com/en-us/autonomous-machines/embedded-sy...