Jorge Stolfi

Computer Science professor, State University of Campinas (UNICAMP), Brazil

Public Key

npub1lg5cpcm24maeaze2xqvuas9ukym6hwxe7s7l5xp48ufzl4z9qznslsjj7a

NIP-05 Address

JorgeStolfi_at_mas.to@mostr.pub

Profile Code

nprofile1qqs052vqud42a7u73v4rqxwwcz7tzdathrvlg006rq6n7y3063zspfcpz4mhxue69uhhyetvv9ujumt0wd68ytnsw43qz9nhwden5te0wfjkccte9ehx7um5wghxyctwvs5zf633

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relay.nostr.band

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npub1lg5cpcm24maeaze2xqvuas9ukym6hwxe7s7l5xp48ufzl4z9qznslsjj7a

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Last Notes

2024-11-20 23:07:30

Summary of the Starship program so far:
Full stack launches: 6
Second stage landings: 0
Fully reusable recoveries: 0
Insertions into orbit: 0
Tons of payload in orbit: 0
Crewed missions: 0
Fuel transfers in orbit: 0
Insertions in Lunar orbit: 0
Lunar landings: 0
Lunar liftoffs: 0
Billions of gov $ spent: 4
Promised Moon landing: 2021

2024-11-17 12:16:02

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@nprofile…args @nprofile…606h @nprofile…5nuy
Indeed the emphasis of math teaching, in high school and early college, is in the sort of logic that enables one to gain trust in a mathematical statement C from facts A and B that one trusts are true.
And that is a good thing, because most problems the student will require algorithms or formulas that he did not learn at school.
🧵‍>

2024-11-06 05:21:44

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@npub1mmf…eknq
America will lose. The world will lose.

2024-11-03 21:38:44

Democracy in the US hopefully will survive this election. But it will soon die, unless the country can get rid of Citizens United, States, and billionaires.
In short: democracy in the US is doomed.

2024-07-20 13:33:59

[Sorry if this joke is too lame, but...]
A pedophile, a traitor, a thief, a fraudster, a wife beater, a failed businessman, a draft dodger, a tax evader, a semi-literate moron, a felon, a mob boss, a rapist, an insurrectionist, a mass murderer, a tacky decorator, a golf cheater, and a senile man walk into a bar. Says the bartender, "And what will it be for you today, Mr. Trump?"

2024-07-17 18:23:09

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@npub13nf…84zh
Ray Bradbury has a story with this theme. IIRC, written in the 1950, and set in the very near (then) future after mankind is wiped out by a global nuclear war.

2024-07-05 16:17:18

Many sources, like Wikipedia,claim that the concept of copyright was born in England in the 17th century and give the impression that it was about properly rewarding *authors*. But in fact it was invented in Continental Europe a couple of centuries earlier. 🧵‍>

2024-06-25 20:02:15

OBJ is a file format for describing 3D shapes of things, e. g. for 3D printing. A .obj file contains data lines that define coordinates of points, corners and colors of polygons, curved surfaces, etc.
Today I learned that version 3.0 of the OBJ format may include lines like this:
csh <command>
Executes the requested UNIX <command>.
Sigh. Have we learned nothing since the Morris Internet Worm?
https://paulbourke.net/dataformats/obj/

2024-06-09 16:42:16

Wasn't is an established precedent in the US that contents created by machine were not copyrightable/patentable?

2024-06-09 16:30:06

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@npub1skv…aky3
But actually it is both! The signals are electric potential waves that are fueled by chemical reactions and trigger chemical reactions...

2024-06-01 12:28:50

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@npub15w5…tse4
And are thpse 10 "users" all sockpuppets of the same Russian agent, perchance?

2024-04-27 02:59:08

/A Non-Linear Bivariate Regresson Model Predicting Mating Success as a Function of Ethanolic Blood Levels in Ithaca, NY Bars/
#OddDissertationTopics
#HashtagGames

2024-04-13 02:10:16

What is the proper general term for someone who is bent on imposing their *religious* beliefs on those who do not share them? Like the Taliban, Iran's Revolutionary Guard, the Spanish Conquistadores, ...

2024-03-24 16:14:58

Never have I ever understood the rules of American football.
(I barely learned /some/ of the rules of baseball when my kids were going through the Baseball With The Parents Watching rite of passage, but promptly forgot them as soon as that brief period was over.)
#HashtagGames
#NeverHaveIEver

2024-03-21 21:25:32

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@npub1zja…m3l3
The deletion mechanism of Wikipedia must be the main cause of editor burnout. There is a clique of editors who get their kicks by bossing other editors and deleting their work, rather than creating or improving articles. Instead of discussing a proposed deletion on the article's talk page, they have their own corner of Wikpedia - the "Articles for Deletion" (AfD) page -- which is usually frequented only by them...

2024-03-21 14:05:35

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@npub1u2h…z4d7
As for Starlink, the system does work, but the big question is whether it will be financially sustainable. Remember the Iridium network? Being a private company, their costs so far are not public (that I know of).

2024-03-21 13:48:03

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@npub1u2h…z4d7
Tesla was not started by him, and it seems that the Falcon half of SpaceX won't let him meddle in their work. All his other "great ideas" -- including Starship, Neuralink, and Starlink, and the Cybertruck -- are either "accomplished failures", or have yet to prove their worth.

2024-03-18 18:24:30

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@npub1v2s…mqq5
I would bet a hundredth of a penny (my gambling limit) that Trump is not just illiquid (he does not have enough cash on hand to pay his immediate debts) but actually insolvent (his total assets are worth less than his total liabilities). While he has billions in real estate, he must have even bigger debts.
And I bet also that he has been in that situation for decades; and has been playing the game "borrow from Peter to pay Paul" all that time.

2024-03-11 11:44:25

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@npub1ks7…eg5u
It has been mostly forgotten by now, but, thanks to a fortuitous lab accident with a short circuit and a can of solvent, he was also the inventor of the Dempster fire.

2024-03-10 14:35:50

I heard a pro-Trump commentator criticize Biden's State of the Union address for being 'partisan'.
Seems that, by now, many Americans have been persuaded that the US has TWO presidents in office...

2024-02-23 15:57:32

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@npub15ee…hmz4 @npub1hyk…3p33
Not sure I agree... Galileo was prosecuted in good part because he publicized his discoveries in such a way that he embarrassed and humiliated the jesuits at the Vatican observatory, who were supposed to be the best astronomers of the time. The "Simplicio" character in his /Dialogue/, who defended the geocentric system, was perceived to be a reference to them.
But it is hard to tell real motives from mere excuses, even with statements by the people involved...

2024-02-20 06:57:14

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@npub1g0t…tvm4
Does not look like Trump or Sanders. Biden, perhaps?

2024-02-13 09:13:26

"Trump, if you are listening..."

2024-02-12 17:50:18

I believe that the US democracy is doomed unless the country can get rid of its three biggest plagues: States, guns, and billionaires.
So, alas, I fear that the US democracy is doomed.

2024-02-11 07:39:25

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@npub1ykd…6j2y
My dictionaries say that "gala" means milk in Greek, and "galaktos" means "from milk" or "of milk".
And "-ose" is a modern suffix used in chemistry, to name compounds that chemists consider "sugars"

2024-02-06 14:19:35

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@npub15zu…s7lx
But only citizens on meth will be allowed to kill the bears on coke, right?

2024-01-16 19:07:33

"The Lion Sleeps All the Time"
#RelaxASong #HashTagGames

2024-01-13 08:25:47

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@npub1g0t…tvm4
Back in high school I had an exceptionally lazy teacher who let the students grade their own exams.
When did the FAA start delegating the certification to Boeing?

2024-01-12 07:42:42

@nprofile…pagr @nprofile…wk6u
Has anyone investigated the role they played in the downfall of the Egyptian civilization? For instance, how much papyrus was consumed for drawings of cats in cute poses rather than administrative records?

2023-10-24 13:38:29

Amy Castor and @npub1lp8…4rrw report on the Texas coalition against wasting 1.7 GW of power from the grid at obscenely subsidized prices, thus extending the life of fossil fuel burning stations, and 1.4 M gallons of cooling water per day while Texans are asked to conserve water, in order to lose investors' money by operating the biggest ponzi and money laundering network ever: https://amycastor.com/2023/10/23/texans-versus-bitcoin-jackie-sawicky-and-the-texas-coalition-against-cryptomining/

2023-08-18 19:05:35

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@npub19qm…sn8k
I didn't care for the ability to block generic users, because I had long stopped looking at my timeline. I have been checking only my "Notifications", which has been showing only a couple replies or mentions per day.
But I had to block a couple hundred HEX fanatics because they kept replying to my messages with insults and HEX hype, which hogged my "Notifications".
Does that new "improvement" mean that all those HEX douchebags will reappear on my Notifications?

2023-08-10 11:58:39

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@npub1pe7…xpvn @npub189n…satx
Isaac Asimov had a story about a scientist who realizes that the Earth and humanity are an experiment run by some alien entity, like a giant Petri dish; and, as in any well-managed lab, there are mechanisms that will eliminate the bugs, without them even realizing it, if they stray out of the intended space.
Humanity may have run out of its intended space...

2023-08-09 18:09:03

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@npub1ks7…eg5u @npub1kvn…hm73
Fixed the wikipedia article. 😉

2023-08-09 12:24:08

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@npub1ks7…eg5u @npub1kvn…hm73
Don't trust the Wikipedia article. The definition of "mole" was changed in 2010 and some editors apparently haven't realized that yet. Now the Avogadro number is an exact number, essentially adimensional like pi or 360 degrees per turn. No longer a "physical constant".

2023-08-05 20:41:08

/Chernobyl/ was good, it deserves a sequel or two.
#HashtagGames
#UnpopularMovieOpinions

2023-08-02 17:36:03

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@npub19qm…sn8k
That unfortunately is the way every government handles investment scams that they failed to nip in the bud.
They know that if they stop a scam while it is in full swing, they will be facing maybe millions of frothing mad victims who will blame THEM for their loss.
So the gov will always look the other way, for as long as it takes, until the scam collapses on its own. THEN the cops will move in and prosecute organizers, promoters, traders, ...

2023-07-31 14:11:42

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@npub14wc…4usp
I am still waiting for evidence that Jack is an intelligent person.

2023-07-19 13:25:15

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@npub10kc…qjyy @npub177h…a2d8 @npub1g0t…tvm4 @npub1yep…rqsz
Considering that stockholders, not the CEO, are the owners of the company, of course the company should do what they want.
What is wrong in that story is the basic principle of Capitalism: "the owners of a company are those who contributed with money -- the 'capital' -- and they get all its revenue. Those who contribute with their work are employees, and get only whatever the owners choose to pay."

2023-07-15 21:52:02

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@npub1zdp…vqv8
The main benefit of smoking cigarettes is the "bad cool" image it projects. https://www.google.com/search?sxsrf=AB5stBiqnvREcl87qvEkat2kyoQg4zVNVg:1689457731690&q=actors+smoking+cigarettes&tbm=isch Fitting for a praying mantis, ♂ or ♀

2023-06-27 11:20:18

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@npub1zdp…vqv8
If I were to upoload my mind, it would be immediately taken down by hundreds of DMCA violation notices.

2023-06-19 19:20:08

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@npub15jg…3c3f
But why don't residents buy tickets on a Starship flight that will take them back to the same Arizona desert, but now with the technology to extract water from rocks and build a climatized dome of 3D-prnted sand over their town, complete with closed-cycle rivers and coffee farms?

2023-05-21 12:31:59

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@npub1ddp…2tax @npub16a3…9dah @npub1eeu…u43z @npub1k9d…eal5
But hopefully a significant fraction of those neofascists are superficial, created by the right-wing media, satanic preachers, and GOP rhetoric. They might be "cured", or at least made less radical, if only those sources of poison could be removed...

2023-05-02 23:51:29

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@npub1pqk…z65u @npub1gsm…5y8l
What is bad about full quotes?
What is bad about with full text search?

2023-04-29 21:21:28

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@npub1xg3…nyjk
Actually the GOP has been paid to implement just one idea: protect every penny of the wealth of the richest.
Destroying democracy and seizing power is not the goal; it is just the means.

2023-04-26 21:57:48

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#[0]
Debates should be mandatory, for all elected posts -- with unedited videos freely available from gov sites.
Ads on any media, on the other hand, should be strictly prohibited.

2023-04-17 13:06:28

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#[0]
H2O cannot be "neutralized" by HO-, can it?
Wouldn't H2 also react with ozone?
I got the impression that the effects of H2 in the atmosphere are entirely conjectural, based on chemical/mathematical models, and there is no data on what is actually happening in reality. Isn't that so?
(PS. I DON'T think that a "hydrogen economy" makes sense, either -- but for other reasons.)

2023-04-04 23:43:12

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#[0]
How can we tell whether it was "only" $1 billion? Is the accounting of PACs reliable? What about the NRA, for example?