Thorondor

6 ms·

1.
by Thorondor 15d ago
Nothing is completely foolproof, but LORAN is much, much more resistant to jamming than GPS. GPS satellites orbit over 20,000 km from Earth and transmit at very limited power (less than 50 W). That makes it easy to overpower their faint s
2.
Superconducting temperature record set at ordinary pressures(anl.gov)
6 points by Thorondor 26d ago|1 comments
3.
by Thorondor 1mo ago
Air-independent propulsion.
4.
Tom Stanton's supersonic trebuchet breaks sound barrier with gravity alone(techeblog.com)
293 points by Thorondor 1mo ago|109 comments
5.
Predicted observability of the Aug. 5 Falcon 9 upper stage lunar impact(arxiv.org)
1 points by Thorondor 2mo ago|0 comments
6.
by Thorondor 2mo ago
The US is the second largest textile exporter in the world. Sources: https://ncto.org/facts-figures/us-textile-industry/ and https://www.trade.gov/selectusa-textiles-industry It's true that
7.
by Thorondor 2mo ago
> Can you provide the source? In the WTO's broader medical goods category, Germany actually exported slightly more than the US in 2022 ($202.6 billion versus $189.6 billion), so such a huge difference in a few years? Sure, these are
8.
by Thorondor 4mo ago
Weights should not be 0 (at least not frequently) but in a ReLU-based neural network, activations are 0 pretty often. You're absolutely right about die area though.
9.
by Thorondor 4mo ago
Hardware engineer here. Special casing the multiply by 0 and multiply by 1 paths is harder than it sounds. In software, the cost of adding special cases is simply performance. You're adding more instructions that execute in sequence
10.
AI agent designs complete RISC-V CPU from a 219-word spec, startup claims(tomshardware.com)
3 points by Thorondor 5mo ago|0 comments
11.
The Rabbit Woman of Gowanus (2015)(theawl.com)
3 points by Thorondor 7mo ago|0 comments
12.
Are laser-based spark plugs a viable option?(eetimes.com)
1 points by Thorondor 8mo ago|0 comments
13.
by Thorondor 8mo ago
Yes, but a car can't use electricity at 1 MV and converting the megawatt back to something lower than 1 MV still produces a lot of heat.
14.
China's Hongqi Bridge collapse: bridge stood, mountain didn't(scientificinquirer.com)
19 points by Thorondor 10mo ago|0 comments
15.
Otto Aerospace Secures 300 Aircraft Order with Flexjet(ottoaerospace.com)
4 points by Thorondor 1y ago|0 comments
16.
by Thorondor 1y ago
A mirror virus would not be able to infect normal cells. Viruses depend on (chiral) host cell machinery such as ribosomes to reproduce.
17.
by Thorondor 2y ago
> Take a look at the structure of something like CMOS and you’ll see why running transistors in anything other than “on” or “off” is definitely not energy efficient. In fact, the transitions are where the energy usage largely goes. We tr
18.
by Thorondor 2y ago
The main issue is that when objects spin really, really fast, they tend to explode due to centrifugal force. The tensile stress on a spinning round, homogeneous object is p * r^2 * w^2, where p is density, r is radius, and w is angular velo
19.
by Thorondor 2y ago
You're ignoring the units of G. The gravitational constant has units N * m^2 / kg^2 = m^3 / (kg * s^2). That contains a length unit raised to the third power, which exactly balances the factor of 8 that you identified.
20.
by Thorondor 2y ago
Landauer's limit assumes that computation uses a thermodynamically irreversible process and erases bits of information. This is not necessarily true for all useful computers [0]. So theoretically speaking, it's not impossible
21.
by Thorondor 2y ago
To prove that it's possible to buy ads targeted on microphone audio. If this kind of targeting was really as widely available as the article implies, a journalist would be able to do it fairly easily and write an article about it.
22.
NASA Public Lessons Learned System(llis.nasa.gov)
1 points by Thorondor 3y ago|0 comments
23.
by Thorondor 3y ago
In my experience, there are a lot of applications that are "trivial" enough that PID works fine. I'm reasonably comfortable with state space modeling for systems with more variables. But OK, I'll bite - always open to
24.
Chess prodigy joked "I'm Taliban" in message, sparked fighter jet escort(dailymail.co.uk)
3 points by Thorondor 3y ago|6 comments
25.
National Hurricane Center forecast verification(nhc.noaa.gov)
2 points by Thorondor 3y ago|0 comments
26.
Light My Fire (How we start rocket engines, part 2)(blogs.nasa.gov)
2 points by Thorondor 3y ago|0 comments
27.
by Thorondor 3y ago
Nuclear energy is hardly the only power source that has made an entire city uninhabitable. The Banqiao dam failure flooded 30 cities and affected over 10 million people. https://en.m.wikipedia.org/wiki/1975_Banqiao_D
28.
How accurate are half-life data of radioactive isotopes?(degruyter.com)
3 points by Thorondor 3y ago|0 comments
29.
Sadly giving up on early retirement and going back to work(financialsamurai.com)
15 points by Thorondor 3y ago|22 comments
30.
200-foot “railway” demolished after court closes shipping loophole(thedrive.com)
3 points by Thorondor 3y ago|0 comments

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