fsh

45 ms·

781.
by fsh 6y ago
Digital calipers can only measure relative position changes (by counting pulses) and would have to be re-zeroed every time when turned off. Since a well-designed pulse-counting circuit can run for many years on a coin cell, it makes sense n
782.
by fsh 6y ago
This is a complete misinterpretation of the graphic. The "Rejected Energy" are the losses that occur when converting primary energy on the left into useful energy on the right. In a car, for example, this would be the difference b
783.
by fsh 6y ago
Yes, any particle accelerator has to account for the relativistic mass in order to function.
784.
by fsh 6y ago
The ISS is actually a pretty bad microgravity environment. Human occupants and their life-support systems lead to rather strong system vibrations. Also the low orbit required for efficient supply flights causes a significant amount of atmos
785.
by fsh 6y ago
Sure, there are some loopholes like a dragged aether that could resolve the contradiction with Michelson-Morley. But you are going to have a very hard time explaining all the other tests of special relativity such as Ives-Stilwell type expe
786.
by fsh 6y ago
This sounds very much like the aether hypothesis of the 19th century which was abandoned since it is incompatible with many experimental observations, such as the Michelson-Morley experiment. The modern point of view is that EM fields are f
787.
by fsh 6y ago
China supplies 0.88% of the WHO budget [1]. The idea that they somehow control the organization is ridiculous and was spread by certain politicians that needed someone to blame for their failures. [1] http://open.who.int/202
788.
by fsh 6y ago
Our vision is not frame-based at all. Each receptor cell can trigger inependently. Chopping up the signal into image frames is simply a technical trick that makes us perceive continuous motion due to the finite recovery time of the cells (p
789.
by fsh 6y ago
532 nm corresponds to double the frequency of 1064 nm, not half. Any nonlinear response generates harmonics of a signal but not subharmonics. This is why in electronics a single diode can be used as a frequency doubler, but a digital flip-f
790.
by fsh 6y ago
Nuclear plants are enormously expensive to build and maintain. Having them idle would be economic suicide for the operators.
791.
by fsh 6y ago
I would say that on hn it very much is treated as such.
792.
by fsh 6y ago
No, Sputnik V is a Vector vaccine just like AstraZeneca and Johnson&Johnson. There are several ones in development in China which all seem to be based on more "old school" technologies. In terms of development they seem to be
793.
by fsh 6y ago
The Cesium isotope used in atomic clocks (133Cs) is not radioactive. This seems to be a common confusion between "atomic" and "radioactive".
794.
by fsh 6y ago
I think that a slow JIT is problematic in any application except for non-interactive numerical calculations. For example in a GUI software or in a server application it would be very undesirable to have each function run a million times slo
795.
by fsh 6y ago
Julia is amazing for numerics, but the JIT is painfully slow for anything that gets looped only a few times or not at all. I don't think it is usable as a general purpose language until this gets improved somehow.
796.
by fsh 6y ago
Nouveau does not support CUDA and is therefore not usable for GPU computing on Nvidia.
797.
by fsh 6y ago
Any decent home router will automatically add the hostname of all DHCP(v6)-configured devices to its DNS service. You shouldn't need raw addresses at all.
798.
by fsh 6y ago
My ISP in Germany charges 5€/month for a non-GCN IPv4, but static addresses are unobtainium outside expensive business contracts. At least most ISPs have good IPv6 support nowadays, even on mobile.
799.
by fsh 6y ago
Theranos pretended to do blood testing for chemical markers. I don't see the connection to the covid pandemic. Theranos didn't even pretend to do PCR tests that would be useful for virus detection.
800.
by fsh 6y ago
Thousands of tons is a very small amount of mass for gravitational energy storage. The capacity of small pump storage reservoirs is measured in millions of tons. Also one probably wouldn't want to use a somewhat toxic and slightly radi
801.
by fsh 6y ago
This is incorrect. Vaccines take forever to develop for economic reasons. Big studies are very expensive, so companies are typically quite hesitant to move to the next step. Vaccine side effects are usually quite rare, so you wouldn't
802.
by fsh 6y ago
The average duration of power outages in Germany has been on a steady decline over the last 15 years [1]. The fraction of electricity generated from renewable sources has increased from around 10% to over 40% in the same period of time [2].
803.
by fsh 6y ago
Miulenberg became CEO in July 2015. The 737 MAX went into production in 2014 and had its first flight in January 2016.
804.
by fsh 6y ago
The Max was developed under James McNerney who is an MBA with no engineering background.
805.
by fsh 6y ago
He only became CEO in 2015. His handling of the Max crashes was shameful, but you can't blame him for Boeing's long-term strategy faults.
806.
by fsh 6y ago
Unlike the Neo, the Yubikey 5 uses a chip from Infineon: http://www.hexview.com/~scl/neo5/ .
807.
by fsh 6y ago
None of the 18860 participants of the Phase 2/3 trial reported allergic reactions after either dose of the vaccine [1]. Over the entire duration of the study, one member of the treatement group suffered an anaphylactic reaction and one
808.
by fsh 6y ago
ARD is a union of nine independent regional public broadcasters + DW. None of these ten has anywhere near the budget of the BBC.
809.
by fsh 6y ago
This is not true. Public servants are paid according to a different pay scale (TVöD [1]) than doctors at public hospitals (TV-Ärzte [2]). With a university degree, you get at most TVöD E13 (sometimes only E11), which is lower than the lowes
810.
by fsh 6y ago
The fee is roughly on the same level as in the UK (210€ vs. £157.50)/household/year. Since there are dozens of regional public broadcasters in Germany, no single one is anywhere near as rich as the BBC though.

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