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vlehto

1,122 karma · joined July 13, 2015

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vlehto··on Low-earth orbit satellites threatened by debris from Indian anti-satellite test
China could attack India via Myanmar. They already have military bases and naval bases there.

Pakistan does not have even puppet state as hindrance.

vlehto··on Deadlines Are Killing Us, and Almost Everything Else I Know About Leadership
I've noticed that thing too. People are incredibly sensitive to assumptions.

If you order someone to do X, they might, if you ask, the might. But assume that they will do X and you do it aloud, they more likely to do X than in any other case.

I have stolen because it was assumed that I would. And that's totally not my normal style of operation.

vlehto··on Fukushima contaminants found as far north as Alaska's Bering Strait
Lead has infinite half life and it's very dangerous when ingested!
vlehto··on Why isn't the internet more fun and weird?
There is also more annoying version of this. Previously people with stupid ideas didn't get much practice in rhetorics. In live conversations you get demoralized very quickly when people don't respond in any way.

Today people with stupid ideas are the ones who get most practice in rhetorics. And practice makes you good.

As a result you find very specific kinds of stupid. If you know Nassim Talebs IYI (intellectual yet idiot) there exist supermutants of that phenomenon. For example I just argued with self proclaimed Marxist who managed to have opinions of fascists straight from 40's. He had absolutely delusional view of multitude of things like not believing in industrial revolution, or that machines could outproduce people when making bulk materials. Yet he could muster huge array of minutiae from history, usually correct and supporting whatever weird point he was making. This dude actually was rhetorically decent and very passionate about.. I don't really know what.

Such individuals are far from stupid despite their stupid ideas and they seem to be able to shut down intelligent discussion on niche boards. Specifically because nothing seems to stick: they are not trolls, not really malevolent, not really belonging to any definite camp. Just really twisted, bored and eager to engage others.

vlehto··on A KGB agent shipped a Sidewinder missile by mail to Moscow (2017)
If soviet union would have done that to west Germany, they would have had full load of US made ICBM's raining on Moscow about one hour after first detonation.

Nuclear weapons (like almost all military weapons) are about A. threatening B. revenging. These are commonly called first strike and second strike.

U.S. currently builds B21 stealth bombers that can carry nuclear weapons, because the B2 has proved to be useful type of threatening tool. Such planes fly undetected in various airspaces and drop conventional bombs to countries who don't have nukes. The message is "we could nuke you and you would not know until it hit you, keep in line peasants". If you didn't want to send that message, you could use either non-nuclear rated stealth bomber or you could use non-stealth bomber.

The second strike is hardened ICBM's in hardened bunkers. Idea is that when the infrared signature of enemy ICBM booster-phase is detected, you have about one hour time to pray and have sex and whatnot. So you use that time to launch your own ICBM's to revenge the impending doom. Because each side knows this revenge is coming, you are not very likely to see nuclear exchange between ICBM sporting states. You are quite unlikely to see any kind of exchange to be accurate.

In case you just spot detonation, you can assume that enemy bomber has gotten through, so you might just as well again launch your ICBM's. The suspects of a launch are usually well known because enriching arms grade nuclear matter is very hard to do undetected.

So Wolkswagen is not suitable because the enemy does not have time to feel threatened. And if you start your wolkswagen engine when nukes are raining, you are already several days late from your revenge mission.

vlehto··on How AI automation could boost employment: The role of demand
If advertising costs go down because of AI, then advertising prices will go down too. That money then goes somewhere else entirely, but anyhow gets spent.

If there seems to be more money around for various causes than before, that looks to the market as if money supply has increased. Which definitely will cause inflation.

Business seems to be getting more profitable because of that applied math, so investing in it seems smart. True deflation would see value of money to shoot up so quickly, that you are better of if you just stuff cash under your mattress.

vlehto··on Soft Silicone Pneumatics Are 3D-printed in a Tub of Gel
I was cutting corners a bit. Here's more in depth:

You can always read very accurate position with pneumatic actuators. You just can't keep it very accurately in place in dynamically loaded situation. You can also read the force of hydraulic system, but you cannot keep it constant as easily in dynamically loaded situation.

If you want (roughly) certain force and you don't care about precise position, then you have lot's of advantages from pneumatic system. The whole volume of the system acts as "hydro-pneumatic accumulator". Which means that the whole volume of the system is trying to average out the change in force. And you get that free of charge. And also you don't have to invest any money into hydraulic fluid. Air is free and available (almost) everywhere.

If you then insist on hydraulic system, you have to put separate hydro-pneumatic accumulator. But because almost any hydraulic fluid is heavier than any given pneumatic fluid, you have more mass in any given pipe section. That means the system will react slower to any(?) pressure increase. You can read the pressure very accurately, but you cannot smooth it out as fast as pure pneumatic system would.

There are caveats though, sound can travel very fast in hydraulics. And turbulence can eat out pressure very quickly. I'm kinda professional in the business, but still starting out.. :D So take this with pinch of salt.

PS. Hydraulic systems can handle 60 bar safely, while 6 bar pneumatic system can already explode and be quite dangerous. That's sometimes enough of a reason to go hydraulic.

vlehto··on Soft Silicone Pneumatics Are 3D-printed in a Tub of Gel
Elastic materials are often avoided if you need either linear movement or accurate position control.

Elastic materials are favored if you need shock absorption or no seal system.

Both hydraulics and pneumatics suffer from incredibly shitty thermal efficiency. Electric engine can be 99% efficient. Any single pair of gears or a chain drive can be 99% efficient. Typical hydraulic actuator is something between 70 - 40% efficient. Pneumatics are as bad or worse.

They do use rubber air bellows in paper machinery, but it's being replaced by rigid hydraulic cylinder actuators. With pneumatics you can have somewhat accurate force (== pressure), but you never know the accurate position. With hydraulics it's the other way round. As a result, hydraulic actuators can be mounted in any position regardless of gravity. So you can use the same machinery in various positions.

Edit: here is more if you're interested: https://www.machinedesign.com/pneumatics/primer-flexible-act...

vlehto··on How AI automation could boost employment: The role of demand
Why would AI cause deflation?
vlehto··on How AI automation could boost employment: The role of demand
Problem with that line of thinking is that it doesn't seem to lead to anywhere. Or am I missing something?
vlehto··on Helsinki to Begin Anonymous Recruiting
You have had some pretty good responses already. Few things adding to the number: Finnish municipalities often hire people with disabilities and pay them fraction of the pay a normal person would get.

Then more specific to Helsinki: city of Helsinki is notorious for inefficiency and shitloads of publicly funded feelgood projects. I've seen it from inside and the handouts that fund weird little art projects and museums that can't attract customers.. Shitshow.

Still there is relatively large amount of tax payers and relatively low municipal tax. Only because the comparison is municipalities where majority of the population is pensioners.

vlehto··on The Human Brain Is a Time Traveler
I think you're onto something here.

A person who graduates from technical program of good university, but then falls for the first Ponzi scheme and starts selling vacuum cleaners? Not very smart.

It's like he has very good processor able to run any math problem you throw at him. But at the same time he doesn't independently do very good job of discerning what is relevant and what is not.

On the other hand some of the greatest scientists of all time have been able to maintain certain "what if" state of mind for years. Doing quick and accurate true/false analysis is often a trait of street smarts, but the most genius of all seem to be able to play with probabilities.

vlehto··on International System of Units overhauled in historic vote
Do I detect sarcasm here? I'm pretty sure I detect sarcasm here.
vlehto··on Estimating the chances of something that hasn’t happened yet
I'm nitpicking, but there is not even a chance that this could be "science" with any coherent definitions of science and future. For example there is Karl Poppers falsification standard. Future is never falsifiable as long as it remains in the future.

Another approach would be this: Future is impossible to research, as you can only research entities that exist or phenomena that is happening. Future entities and future phenomena do not exist yet ( by definition ) so you cannot research them. -> no science of future.

What we are talking here is scientific prediction. "Scientific" is just another word for good and only means something when compared to another method of prediction that can be shown to be worse.

So we very much agree. I just wanted to write this out because the Future studies crowd has bothered me for some time now.

vlehto··on How the Finnish survive without small talk
In Finland we have these things called "Pönötys" and "kursaileminen". I'm half kidding, but half serious. Pönötys means awkward formal standing when you are wearing a suit or can of beer, but don't know where to put your hands or anybody to talk to. It actually happens a lot. "Kursaileminen" is kind of pretending that you don't need anything and have nothing to say. It's finnish way of being polite because you are not bothering anybody. Also happens quite a lot.

You do both of those and then you sneak to someone and ask them anything. It might well be "how do you know the host?" But Finns are quite flexible with the subjects because there is no culture of what you ought to speak about. You can ask anything, you don't have to ask anything. But do expect to get a throughout and honest answer.

It's great if you're imaginative and curious or if you want to be left alone. But if you fall in the middle it can get difficult.

vlehto··on How the Finnish survive without small talk
Finns know that phrase. Just like Americans know the words "your majesty" despite not having any royals.

Finns use it exactly in same way as American would say "your majesty". It would likely be a sarcastic remark coming from a Finn. So the meaning is not that far off.

vlehto··on Autonomous Trucks and the Future of the American Trucker
Are you sure that the stacking height is driving the tare weight? I would guess that it could be retaining longitudinal stiffness even after some corrosion. Also theft protection is driving the material selection more than anything else.
vlehto··on Autonomous Trucks and the Future of the American Trucker
You don't get many good carpenters out of unemployed truck drivers. Good carpenters are born to be good carpenters.

That's the problem with most difficult to automate jobs that don't require college degree. They sound like anybody could do it. But there is huge difference between good renovation and bad renovation. The kind of guy who can do good job consistently is rare. The job requires passion and good attitude and personality that matches the job.

It's kinda sad how many men are passionate about driving a car. It's bit like how many women used to be passionate about weaving.

vlehto··on Decline of Global Extreme Poverty Continues but Has Slowed
...responsibility of Chinese state to adopt capitalist strategies of generating wealth. Thats the big thing they did different from soviet union. Everything else they do is pretty run of the mill geopolitical selfishness.
vlehto··on Decline of Global Extreme Poverty Continues but Has Slowed
Maybe Orwell was just social democrat later on. I read "why I write" and Orwell was for equality and against aristocratic two tier society. It's a stretch to conclude anything further, as he even supported Churchill's war effort.
vlehto··on The Deliberate Awfulness of Social Media
I'm clearly somehow not communicating my stuff well enough. I'm not into dividing people into categories by IQ. I'm frustrated how people use their limited resource of attention.
vlehto··on The Deliberate Awfulness of Social Media
What bothers me more than anything in that article is superficially smart people pouring all of their concentration onto stupidity of obviously stupid people.

With my university educated 25 - 35-year-old social circle, I can easily generate boring conversation about Trump, climate change denialism, right wing activism, situation in Palestine or how facebook is cancer to regular people.

15 years ago my 15-year-old social circle would discuss climate change, US election system, nature of capitalism, future of internet and how to approach war in philosophic sense. Notice the difference? Those discussions were not too intelligent, but at least the subject matter was actually challenging.

This piece seems symptomatic of the disease. The writer appears potentially capable brain user. But fails on several occasions to actually use that brain. And it seems like the culprit is again over concentration on the stupidity of the stupid people. Feels like wasted effort and the left leaning boogie mans he does offer as culprit don't seem to be at all believable.

Where are the people looking to engage the smartest person they know of? (HN is quite solid, but also very coding specific.) Has there ever been a time when that was an actual thing? How could I do that?

vlehto··on Senate passes copyright bill to end 140-year protection for old songs
Patents last 20 years only if you keep paying the maintenance fees.

Edit: Here's and idea: The yearly fees for copyrights ought to be something like X = years from publication, fee is X^X. So the first year would cost a dollar and the 10th year would cost 10 billion dollars. You can keep your copyright as long as you want!

vlehto··on How Puerto Rico Became a Tax Haven for the Super Rich
You're right. Money doesn't flow too easily from the most rich to the most poor without government intervention.

But state finance is separate issue from that. And money flowing to the most poor would not do much to state finance, because the most poor typically are unemployed and hardly pay any taxes.

vlehto··on How Puerto Rico Became a Tax Haven for the Super Rich
Puerto Rico now has rich consumers who pay the salaries of poor Puerto Ricans. Who then pay income tax.

Small slice from a big pie is better than big slice from non-existent pie.

vlehto··on Ask HN: What made your favorite manager/supervisor/CEO so great?
It's weird how easy it is to be shitty manager. If someone is otherwise excellent, but blames you for stuff you didn't do? Instantly shitty manager there.
vlehto··on How to Name a Baby (2013)
That would be "word" in finnish
vlehto··on Genoa Bridge Collapse: The Road to Tragedy
That was interesting, thanks.

But you might be pleased that the most modern system at least in Finland actually has little of the same features than the romans had. If you look at the same membrane I posted earlier, it has little knobs that hold it little bit away from the wall:

https://monosilla.files.wordpress.com/2014/11/screenshot-201...

I don't know the English word for it. It's not perfect, but lot better than couple decades ago. They used to paint the concrete with tar. This "patolevy" is cheaper, easier to install and allows little bit of ventilation.

vlehto··on Genoa Bridge Collapse: The Road to Tragedy
Sounds like the water comes just from capillary action. That is very good situation compared to actual ground water pressure pushing moisture through the walls.

You should be good if you keep there good ventilation and avoid putting any wood dust or wood structures directly in contact with the concrete. Wood and concrete combined are breeding ground for dry rot and that fungal nightmare can tolerate more arid environments than any other.

One trick you could try is to put some asphalt outside right next to the wall. It won't solve any underlying issues, but it can help a little bit.

I think the crumbling comes from something else than moisture in your case. Probably oxidation of cement accompanied with temperature variations. You can treat that in some cases by injecting cement into the cracks in the wall. But that is very expensive.

vlehto··on Genoa Bridge Collapse: The Road to Tragedy
Would not be the first time saving lives ends up being less important than avoiding responsibility. So I agree on your prediction.
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