Anyone got a list of the countries? I tried googling around a bit to try to find it. At least other articles[1] mention all G20 countries are on board. That would include India, Russia and most importantly China.
Readit Newsmikeha commented on Global minimum corporate tax: 130 nations to support U.S. proposal cnbc.com/2021/07/01/natio... · Posted by u/DocFeind
mikeha commented on FDA just cleared a $20 Covid-19 antibody test coronachecktest.com/... · Posted by u/ck2
> The sensitivity is 97.90 %, the specificity is 91.77%.
This seems like it could provide a false sense of security to many if used widely by the general population.
And also this.
>Positive results may be due to past or present infection with non-SARS-CoV-2 coronavirus strains, such as coronavirus HKU1, NL63, OC43, or 229E.
mikeha commented on Ouster's new digital Lidar – 128 beams, ultra-wide view ouster.com/blog/128-chann... · Posted by u/derek_frome
Anyone have a LIDAR (or similar) product suggestion?
I'm getting ready to start a hobby project that involves scanning the interior surfaces of a house. Ideally the accuracy would be at least 1/16" (1.5mm), including any scan-stitching required because the sensor had to be moved around.
I've seen a few promising products, but none stands out as a perfect match.
Take a look at Leica RTC 360. It's a survey grade terrestrial lidar scanner.
Angular accuracy 18” Range accuracy 1.0 mm + 10 ppm 3D point accuracy 1.9 mm @ 10 m 2.9 mm @ 20 m 5.3 mm @ 40 m
(disclaimer: I work for Leica)
mikeha commented on How the LIDAR tech GM just bought probably works arstechnica.com/cars/2017... · Posted by u/deepnotderp
The Mesa Imaging SwissRanger is an amplitude modulated system, not frequency modulated. It's also not really LIDAR, as it uses LED illumination, but AMCW LIDAR is more or less the same principle. A better comparison might be laser tape measures - these often use phase modulated LIDAR rather than direct ToF. You can also buy phase shift scanning systems from people like Leica Geosystems.
In a ToF camera (at least some of them - see lock-in pixels), each pixel is sampled four times per cycle to detect the phase offset from the outgoing illumination. The SwissRanger was one of the first time of flight cameras. The reason it suffers short range is because of phase ambiguity - the lasers are modulated at around 30MHz which gives a wavelength of 10 m or so. The ambiguity distance is half this (5 m). LIDAR systems historically got round this by using multiple modulation frequencies for different distance scales.
This tech is now everywhere thanks to Microsoft buying Canesta.
Leica Geosystems used to sell phase-based scanners. These units were actually rebadged Zoller+Frohlich scanners. But the partnership ended a few years ago when Leica introduced the Pxx series. Today the company only makes time-of-flight scanners.
source: I work at Leica Geosystems.
Great project! but the title "3D scanning like a pro" is quite a stretch. Real 3D scanning pros use something like this Leica P40 scanner:
https://www.youtube.com/watch?v=GnmerVV5-T4
And produce outputs that look more like these: https://truviewglobal.leica-geosystems.com/welcome
(full disclosure: I work for Leica Geosystems).
mikeha commented on Galileo navigation satellite system goes live dw.com/en/galileo-navigat... · Posted by u/vezycash
>sub-millimeter survey grade accuracy
Could you provide some links to read? I just can't imagine how it's possible.
http://www.leica-geosystems.us/common/shared/downloads/inc/d...
(full disclosure: I work for Leica Geosystems.)
With real-time kinematic service, our GPS receivers give you 8mm horizontally and 15mm vertically. And you will get 3mm hz and 4mm vertical with post processing.
So, in other words, ClearMotion is producing a technology that other OEM's have been doing for years. Just off the top of my head, Cadillac has their magnetic suspension (which uses a fluid that changes viscosity in the presence of a magnetic field. I guess this is the same as what TFA claims is brand new.) The Ford Raptor with their live valve by Fox has a solenoid valve that regulates the shim pack. (Funny enough, I've spent all morning doing a FEA analysis of their valve.) The latest Mercedes Gelandewagen also has solenoid valves in their dampers to switch between soft and hard damping. Citroen has been doing it since the 50's with a purely mechanical system.
The basic idea is very simple: you want a computer to regulate the damper between soft and firm, as the road dictates. The implementation of this can become very complicated and there's a number of very different implementations. If I remember right, the Bose implementation required too much electricity to be practical. Most other implementations have some type of solenoid valve to control the pressure drop of the hydraulic fluid across an orifice. Again, the theory is simple, but mass producing a system that is cheap, reliable, yet can respond in milliseconds is difficult.