Want to read Slashdot from your mobile device? Point it at m.slashdot.org and keep reading!


Forgot your password?
DEAL: For $25 - Add A Second Phone Number To Your Smartphone for life! Use promo code SLASHDOT25. Also, Slashdot's Facebook page has a chat bot now. Message it for stories and more. Check out the new SourceForge HTML5 Internet speed test! ×

Comment Ugh spreadsheets (Score 5, Interesting) 168

In a recent ticket I got, one of our finance guys complained that our computers (Haswell i7, 8GB RAM with an SSD) were too slow and that he needed a better one. The finance director of course immediately signed off on the purchase request before even asking me for a price. I couldn't quite believe that complaint and had him show me what wasn't fast enough, and was treated to a horrible mess of a XLSX with a million rows, two hundred columns, and vlookups and pivot tables everywhere.

Out of pure curiosity I let that run on a 64 bit Excel on an empty terminal server with 128GB of RAM and of course it ran like crap on there too. I never tried deciphering the spaghetti code of that spreadsheet, but I'm almost certain that if it had been developed in a real programming language, it would've stepped down the O(n) complexity by a couple levels and made the whole calculation run in seconds.

Never believe anybody who says his computer is too slow because of a spreadsheet.

Comment Re:How far will it be from orbital plane? (Score 1) 44

https://echo.jpl.nasa.gov/aste... as a nice animation of the entire orbit.

It seems to have a very high eccentricity and a decently large inclination so it won't have repeated encounters with us. That site mentions that there are no more close encounters until at least 2500.

Normally you could look up exact orbital elements from https://ssd.jpl.nasa.gov/horiz... or https://neo.jpl.nasa.gov/orbit... but those don't have "2014 JO25" listed. Anyway, it doesn't matter all that much, in orbital mechanics distance is pretty much equal to timing. Whether it crosses paths or not isn't all that important.

Comment Re:Very interesting! (Score 1) 93

Because the collectibility is what they're using for fiat money, and the value in fiat money is in the consensus in the population that the value exists. You can make a bit-for-bit copy of that image if you want, but nobody is going to give you a chicken in trade for it.

Comment Re:Maybe (Score 1, Insightful) 213

There's a lot of words but most of the points don't seem to make a lot of sense.

1. "Adjective nouns" need to have similarity to "noun" but aren't necessarily a subset. Gummy bears aren't a subset of bears either.

2. I'd like to see a citation on this. I highly doubt that you can simulate the formation of a solar system where multiple Mars analogues can coexist in the same orbit over billions of years without an accident happening to one of them.
Alone the fact that neither of the terrestrial planets have an orbital buddy tells us a lot about the chance of that happening.

3. In a geological sense yes. But the current definition of planets is based on orbital mechanics, after which Earth is a lot closer to Jupiter than to Ceres/Pluto.

4. Hydro-static equilibrium as a dividing line is way worse. There are roughly 100 TNOs where we don't really know whether they are elliptical. We'd have to visit each and every one of them with a probe just to put them in the proper category.
Meanwhile, it's completely clear which bodies qualify for the "clearing its orbit" rule. All currently qualifying planets have roughly 99% or more of the mass in their orbit in themselves. Ceres has 30%. Maybe there'll be an edge case eventually (Planet X or some Exoplanet) but that's a thing we can deal with in the future.

5. The definition should be mutable. Why should a planet that gets ejected keep counting as a planet?

6. I highly doubt life could form in a non-cleared orbit. There'd be late heavy bombardment style impacts all the time scouring the surface.
As for a life bearing celestial in orbit around another (gas giant) planet: I don't think anybody feels bad about calling that one a moon? As in "Yavin 4".

7. "Within each other's periapsis and apoapsis" seems like a reasonable enough definition that neither Ceres nor Pluto qualify for.

8. Yes that's silly but that'll probably be changed easily enough and has no effect on Pluto.

9. How are you planning to ascertain hydro-static equilibrium for an exoplanet if we can't even do it for Varuna.

etc etc the later points get even wordier and more politically minded.

Comment Re:how about the obvious definitions? (Score 2) 213

The problem with that definition is that it'd include a lot of random TNOs. We'd be up to like 15 planets by now, with an additional maybe 100 yet to be found in highly eccentric orbits, and probably tens of thousands more in the Oort cloud. In my opinion, those rocks hardly belong in the same category as Jupiter and Mars.

Also, if that definition gets chosen you can look forward to decades of drama after every new TNO discovery about whether that object is in hydro-static equilibrium or not. Can you imagine if a Chinese astronomer finds such an object barely on the edge of the definition, but we only have a few single pixels of images available, and the IAU needs to make a finding on whether it qualifies as a planet or not?

Comment Re: Two questions (Score 1) 69

Israel's budget is $70b, and they receive $3b in direct government aid from the US. That creates a whole bunch of weird incentives that pop up when a large amount of the money you spend doesn't come out of your own pocket. And I doubt that since the end of the Soviet Union, there is any other country that finances 5% of its operation through foreign aid. Even Venezuela currently only gets less than $100m a year total, and the Chinese probably aren't spending a lot of money on North Korea either although it's of course impossible to get real numbers there.

Comment Re:This is what you get with low cost manufacturin (Score 1) 166

People aren't going to shit into the town well, but even there I am willing to question how far that is because they are aware of the consequences of their action, and not simply because they knew they'd get a beating from all the other townspeople. There'd certainly be people that would readily do so as long as there was another well somewhere else that they could drink out of.

But even that common sense you describe seems to go away really quickly as soon as the damage isn't completely obvious. In many places it's absolutely nothing unusual if you throw your trash into the same ocean the fish you're eating for dinner comes out of. Abstract that even further to ppms of invisible gases in a million cubic kilometers of air and even some people with doctorates seem to have trouble understanding the consequences.

Clearly, a dictatorship cannot handle this issue as well as a democracy can. The people in power are way too close to those few who benefit from lax environmental standards way more than they'd benefit from better environmental conditions. But as you noted, privatization is not an option for fleeting resources like water or air.

Comment Re:This is what you get with low cost manufacturin (Score 1) 166

I find your segue into the anti-government rant a bit weirdly placed. Air quality is a textbook example of a "problem of the commons" situation - probably the biggest of them all because the atmosphere is literally one giant planet-spanning commons that everyone draws from.

And personally I cannot see a solution to the problem of the commons other than through goverment. Because even if people do realise they are also hurting themselves by polluting, it doesn't change the fact that a benefit from polluting less will be shared by everybody, while the costs of doing so are only applied to them. A rational actor will therefore always make the problem worse. Nobody wants to be the only guy on the block that spends double the money for oil heating, while still taking in 99% of pollution because everybody else is still on coal.

In a government, people can agree on reasonable restrictions that everybody needs to abide by to make the situation better. If you can outright make coal heating illegal, then people can expect 50% of pollution for double the money, and might even enjoy that change.

Now I do agree that there's a big caveat here and a possibility that such regulation would be overbearing, but I find it kind of silly to believe that we could have successfully made all the environmental progress of the past few decades in the west without the hammer of big government behind it.

Slashdot Top Deals

"You need tender loving care once a week - so that I can slap you into shape." - Ellyn Mustard