gene-h

26 ms·

211.
by gene-h 8y ago
This is quite surprising! I'm quite surprised at the fact that no one has thought to put tracers on leidenfrost droplets until now. Really makes you wonder at what other interesting phenomenon are happening in plain sight we've ye
212.
by gene-h 8y ago
I tried doing this with a novint falcon and reaxFF. I was able to push and pull on simulated molecules, but doing so gave me vertigo. Another problem was in this particular case the interesting phenomenon the molecule exhibited only occurre
213.
by gene-h 8y ago
TL;DR they make a droplet on a capillary tip and use the radiation pressure of sound to push it off, enabling printing with liquids with viscosities ranging over four orders of magnitude. It's cool, but in the current approach they sti
214.
by gene-h 8y ago
There are some aluminum plants in Germany that do this[1] More ambitiously ARPA-E has a program where one of the goals is light metal production(aluminum, magnesium,etc) using variable energy sources[1]. One of the interesting possibilities
215.
by gene-h 8y ago
Here's an article with pictures of their 3d printer[0]. The TL;DR is that they mounted a syringe pump on a 3d printer. Aside from that, I'm curious as to what advantages aside from being cheap this printing process has over inkjet
216.
by gene-h 8y ago
Of course this technology is old, the Aprahulians used similiar techniques to build quite large digital computers around 850 CE[0].* Of course on problem with such pulley logic is the difficulty of building signal amplifiers. Without signal
217.
by gene-h 8y ago
Personally I think we'll see these tasks automated after we automate surgery. The value added accomplishing these tasks is low, the cost of robots is high, and the difficulty of a robot doing them is high. It is difficult for robots to
218.
by gene-h 8y ago
I have many of the same questions too. In industrial robots one of the most important numbers is mean time between failures(MTBF). If the MBTF is too low, that is the robot breakdown or otherwise fails, you spend more on fixing the robot or
219.
by gene-h 8y ago
Fluidics have actually found useful applications at extreme temperatures. Fluidic capillary pyrometers have been used to measure the temperature of molten steel and here is an image of a fluidic afterburner fuel control operating at tempera
220.
by gene-h 8y ago
Absolutely. In order for fluidic devices to function you have to vent fluid to ground. For pneumatic devices this is typically the surrounding air. This should produce an acoustic signal that can be detected. However, one could operate such
221.
by gene-h 8y ago
Fluidics was a technology that was invented at the wrong time. It was invented in the 1960s just as transistorized computers were becoming common. One can only speculate on what the world would be like if fluidics was discovered say in the
222.
by gene-h 8y ago
Maybe we can take advantage of the fact it's orbiting the wrong way. Perhaps we can send an impactor and capture some of the ejecta. At the very least we can analyze the spectra of the impact flash to see what it's made of. Perhap
223.
by gene-h 8y ago
Yes, because a flywheel is a very efficient device for producing flying shrapnel. It's already storing kinetic energy, it's simply a matter of letting all that kinetic energy loose. Energy storage flywheels have injured people in
224.
by gene-h 8y ago
I wouldn't say that it's on par with with a spot mini. Walking and movement seems pretty slow and rough. It's really too bad that advancements in actuator technology haven't made it into consumer robots.
225.
by gene-h 8y ago
Absolutely, and NASA is currently investigating this. There is the idea of magnetoshell aerocapture[0][1], which is to create a shell of magnetized plasma around the spacecraft which can be used to slow down the atmosphere. There are a coup
226.
by gene-h 9y ago
I'd be surprised if they didn't have some project on home robots. While I would like to see Amazon have a program for making robots that do useful tasks like dishes they are probably going to make something more like an echo on wh
227.
by gene-h 9y ago
Hydrogen offers better prospects for civil aviation than batteries do. Airbus did a study[0] that showed it would be possible to power all civil aviation use cases with cryogenic hydrogen. They even showed that in the near term existing air
228.
by gene-h 9y ago
This is a pretty big advancement. Robots have been able to assemble products for years in structured environments with lots of expensive programming, so it has only made sense to use them to assemble lots the same thing, things humans can&#
229.
by gene-h 9y ago
There was a huge amount of teleoperation research done for the DARPA robotics challenge and there still is for things like servicing satellites. Movable points of view and haptic feedback are not enough to solve teleoperation. A big problem
230.
by gene-h 9y ago
The scan rate and accuracy may not be the best, but the fact that they are using a linear photodiode array impresses me. The fact they were able to do all this for $35 is even more impressive, and I await the day I can purchase this from ch
231.
by gene-h 9y ago
MOFs aren't mass produced, but it is possible to produce large quantities of them. BASF has been able to make double-digit tonnage quantities of MOFs per a single production run[0]. It much simpler to make MOFs than other nanomaterials
232.
by gene-h 9y ago
It is certainly quite uncommon to see "Clarke and Kubrick" cited in a paper.
233.
by gene-h 9y ago
Frankly I'm wondering if 5G will ever take off. One problem with 5G is that it uses higher frequencies, which carry more bandwidth, but don't go through obstacles so well. So you need much more hotspots, which A is creating zoning
234.
by gene-h 9y ago
SpaceX probably did not request an air strike. This might be a case of weird rules for dealing with range safety. That is making sure the area around the rocket range is safe. As this was a military launch, the US Air Force Space Command wa
235.
by gene-h 9y ago
And because it's HP they're also doing other nasty stuff too. You know how most 2d printers put invisible tracking dots in their prints to prevent counterfeiting? Well HP's 3d printers are going to do the same for 'secur
236.
by gene-h 9y ago
Their printing process is pretty new. Sure printers that can print in color have existed for a while now, but they weren't able to produce strong parts like this printer does. Other printers that produced similar strong parts also coul
237.
by gene-h 9y ago
Well if you want the laser to produce better images then one needs to use the dark art of cam design. As it turns out, simply determining cam geometry necessary to go through all those points is not enough, one must also take into account t
238.
by gene-h 9y ago
The headline is misleading, they haven't approved the design yet. However, they've been able to certify that the reactor does not need a certain standard of backup power supply and electrical circuitry due to the passive safety fe
239.
by gene-h 9y ago
>How long does the power unit lasts until you have to replace the paper-towel-roll-sized U-235 core? It's not a completed design, but based on their proposed design[0] 20 or more years. The old reactor core is going to remain in th
240.
by gene-h 9y ago
Fission isn't necessarily easy. One problem is that the reactor behavior changes when you add the generators to the reactor. These components can reflect neutrons back to the reactor, which changes how much power the reactor produces.

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