Viewing profile — jcarreiro

There are many, many more tax returns filed by people earning under 200k adjusted gross income than those earning more, I assume. So if there's a uniform chance that a return is au…

The paper says that: > In practice, we find that four Taylor terms (P = 4) suffice for recovering conventional attention with elementwise errors of approximately the same magnitude…

This must be facetious? A GFCI breaker in a house's electrical panel and any breakers present in the transformer on the utility pole are protecting against _very_ different scenari…

> The problem with that is then you need a mechanism that creates non-uniformly distributed mass. The mechanism is gravity; and we have good observational evidence that the mass di…

Sadly, this is not possible, at least AFAIK. The basic problem is that a gravitational wave won't push against you, like a water wave would; the wave will pass through you. See htt…

Because they are researching inertial confinement fusion, not trying to build a working power plant. The efficiency of the lasers doesn't matter, since it doesn't affect their rese…

You can download a version without the watermarks from arXiv: https://arxiv.org/abs/1804.03719 .

So if HN added advertising to support the site, you would totally stop posting here, right?

This is a good observation, but gravitational lensing surveys have all but eliminated massive compact objects as a potential source of dark matter; see for example https://www.ncbi…

"The period for which reasonably reliable instrumental records of near-surface temperature exist with quasi-global coverage is generally considered to begin around 1850. Earlier re…

This article is not about FRBs: Earlier this year, Swinburne University's Emily Petroff was the lead author of a report on the first observation of a fast radio burst (FRB) in real…

The convenience is hard to beat. I recently switched from a drip coffee maker to a Keurig, and I love it. My wife and I don't drink much coffee and so making 12 cups is a huge wast…

It's a bash bug because the bug is ultimately in how bash parses environment variables. My understanding is quite limited, but IIUC, after the invalid function definition, the bash…

You can do this in Preview.app. :) Edited to add: BTW, Shift+Cmd+4 is a super useful shortcut from taking screen grabs on the Mac.

> Where the F#?k is Dexter when you need him? Vigilantism is not the answer.

The "decoder" rat was not trained beforehand, unless I am badly misreading the article. The training process that occurred used the real-time signal from the "encoder" rat's brain.…

According to the article, "Servicemembers from the tank brigade that found the crater have confirmed that background radiation levels at the site are normal", and "Background radia…

Ah! I did not know that. Thanks for informing me, I'm happy I got the chance to learn something new today. :)

It is very nice penmanship. Nice to see skills like this still around. From the article: It’s clear that it is mostly, but not completely handmade, as although the included paper i…

> I guess you'd fill the capsule with 'locally sourced' air There is no air on the moon, so this doesn't seem likely.

I believe their argument stems not so much from the intelligence of cetaceans -- as others have pointed out, intelligence is hard to define -- but from evidence that they are self-…

Where exactly in that article does the author make any sort of argument that would support his thesis?

This is part of NASA's Planetary Protection directive [1]. Their goal is to ensure that we do not inadvertently contaminate the pristine environments that we visit with our spacecr…

> Doesn't mars also lack a magnetic field? Yes, that's correct. There is no global dipole magnetic field on Mars [1]. However there are weak fields "frozen" into some of the oldest…

> the most interesting things you can see are the dust > devils and maybe/hopefully, ice formations For the geologists who designed the scientific instruments on Curiosity, the mos…