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Is Storage Necessary For Renewable Energy?

Rhywden Re: Expert?? (430 comments)

"Complex / insane" and "aerodynamic" usually don't mix very well. Not to mention that there's the usability factor - you may get an insanely low cv from a teardrop shape. Doesn't mean that it's usable.

2 days ago
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Is Storage Necessary For Renewable Energy?

Rhywden Re:Expert?? (430 comments)

Yes. But they're not cheap and the production process is quite involved. And he specifically drew a relation between material used and possible aerodynamics:

[...]Replacing metals with ultralight, ultrastrong materials like carbon-fiber composites can provide safer, lighter and more aerodynamic vehicles that consume severalfold less energy and could be simpler to produce with 80% less capital.[...]

From:"Reinventing Fire: Three Energy Gamechangers for China and the World, Nov. 15th, 2013, pg. 2

He specifically mentioned "more aerodynamic" in addition to "lighter". I'm also not that convinced of "ultrastrong" materials being safer due to the fact that you want a crumple zone to soak up kinetic energy.

Not to mention that "severalfold less energy" is a lie: The BMW i3 already largely consists of carbon-fiber and is not that much lighter and, if you calculate the average energy consumption, doesn't consume that much less energy.

Lastly, carbon-fiber is not more "simpler to produce". Folding, bending and melting metals is easy compared to what you have to go through for carbon-fiber. Not to mention that it's not recycleable. Metal is easy to recycle.

2 days ago
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Is Storage Necessary For Renewable Energy?

Rhywden Re:"Dance" = rolling blackouts (430 comments)

Well, that's the problem with most renewable energy creators: They're dependent on an external factor. So, keeping some in "reserve" might not exactly yield the result you want. What use are additional windmills is there's no wind? What use are solar panels if it's nighttime or overcast?

Yes, there are others like biogas or waterpower, but most of those would fall under this heading of "energy storage" which this guy proposes to be superfluous. If they aren't storage technologies, they're usually not scalable enough, either due to provisioning problems (biogas) or geographical restrictions (water).

2 days ago
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Is Storage Necessary For Renewable Energy?

Rhywden Re:Expert?? (430 comments)

I did read some parts of it. For instance, he proposed that switching to carbon-fiber instead of metals that we would be able to create more aerodynamic shapes. Which is rubbish, of course, the shape of a car is not dependent on the material used.

He also proposed that switching to carbon-fiber would reduce costs. Far from it: Production of carbon-fiber is a very expensive process due to the way the shapes are formed. One of the reasons, by the way, why the BMW i3 is quite expensive.

There were a whole slew of conjectures, shoddy/dubious reasoning and exaggerations in there.

2 days ago
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Is Storage Necessary For Renewable Energy?

Rhywden Re:Expert?? (430 comments)

Yeah, I just read that rubbish. Numbers which appear from thin air, false causal relations and shoddy reasoning. I didn't enjoy that at all.

2 days ago
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Is Storage Necessary For Renewable Energy?

Rhywden Re:"Dance" = rolling blackouts (430 comments)

Great. Which results in your economy being dependant on the weather. I can see the historical articles now: "The big wind calm of 2030 lead to a nation-wide depression as the metalworking industry was unable to sustain minimum power needed to keep the metal from solidifying."

2 days ago
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Is Storage Necessary For Renewable Energy?

Rhywden Re:Expert?? (430 comments)

Well said. He also forgets that we already have problems with failover and unexpected losses of transmission lines which lead to blackouts.

I mean, one could probably design a system which works as he proposes - however, this would almost certainly mean a complete revamp of the existing electrical grid.

At which point investing in storage technology and facilities will be the cheaper and more reliable solution.

2 days ago
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Two Years of Data On What Military Equipment the Pentagon Gave To Local Police

Rhywden Re:No (264 comments)

Irrelevant. Cops are SUPPOSED to shoot people because that's what they are paid for.

There's something very, very wrong with your views on what the cops are supposed to do.

2 days ago
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Slashdot Asks: Should Schooling Be Year-Round?

Rhywden Re:Books (421 comments)

I sincerely doubt that teaching matrices in 7th grade raises "understanding and awareness". As I said, I am a teacher and there's a reason why we don't begin with Maxwell's equations when talking about fields.
Again, difficulty of a subject does not automatically yield deeper understanding. You're making the same mistake as anyone who thinks that there's one way to teach: That there's one single way which works best.

There isn't. Teaching effectiveness depends on the pupil, the teacher, the subject, the classmates and a whole slew of other conditions.

And, to drive the point home: Simply raising the difficulty is a very bad way to go about it. Because you will lose the weaker pupils. You're obviously suffering from the notion that what was good for you must be good for others. I'm seeing this all the time: This notion of intellectual superiority just because you yourself mastered some difficult subject or other. Extrapolating from your subjective viewpoint to a general notion is a very big mistake.

about two weeks ago
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Slashdot Asks: Should Schooling Be Year-Round?

Rhywden Re:Books (421 comments)

I have to say that you seem to make the mistake of regarding quantity equivalent to quality.

Take your bragging about how many books you had to read. I find it pretty hard to believe that you took anything meaningful from reading alot of quite difficult books. What's the use of reading so many books? And please don't try to tell me that you actually read and not merely skimmed them. I mean, we usually cover one book per month during lessons (if that much) but in detail.

Furthermore, matrices are indeed something you don't really need before university - I fail to see the use for that. That's coming from a Physics and Chemistry teacher, by the way.

And the Bavarian school system is moronic. They recently punished a teacher for having a class that was too good. They wanted her to grade her pupils on a bell curve. Again, "hard" is not the same as "good". And, yes, their results in tests like PISA are better (sometimes). But only because the sample groups are actually not comparable.

about two weeks ago
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Slashdot Asks: Should Schooling Be Year-Round?

Rhywden Re:Books (421 comments)

Then you were going to the wrong school in Germany. There are quite a lot of "old-language" schools in Germany, I myself went to one of them. We could take latin in 7th grade and old greek in 9th grade (with french being an option in 11th grade).

Vacation time is 6 weeks in summer, 2 in autum, 2 in winter and 2 in spring.

about two weeks ago
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New Process Promises Ammonia From Air, Water, and Sunlight

Rhywden Re:This could be great (117 comments)

Since it was first synthesized in 1863, I dare say that it's not that hard. You merely need fuming nitric acid to enable the third nitration. No catalysts needed.

about two weeks ago
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New Process Promises Ammonia From Air, Water, and Sunlight

Rhywden Re:This could be great (117 comments)

Oh, please. Creating explosives is easy (well, the creating part is easy. The "don't blow yourself up prematurely"-part usually not so much).

You merely need nitrating acid which you get by mixing nitric acid and sulfuric acid. Both acids are relatively easy to obtain (Both acids are sold on Amazon over here). Then you mix the nitrating acid with cotton, dry the stuff carefully and you got: Gunpowder Cotton, also called: Smokeless Gunpowder. All you need is a fumehood because mixing the acids is a bit hard on the lungs.

If you want to up the ante: Use glycerin (a laxative, also easily obtainable) instead of cotton. And, you guessed it: You get Nitroglycerin. However, the nitration process is exothermix and you need to be very careful when mixing the acid into the glycerin or it will blow up.

Those are just two examples. Almost the same process is used to produce TNT, by the way.

about two weeks ago
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Microsoft's Nokia Plans Come Into Better Focus

Rhywden Re:Sigh, that's another waste of time then. (149 comments)

No, they don't control the hardware and OS. Merely putting out a reference system of sorts does not mean the total control Apple has over their devices.

If you can't see the difference then I can't really help you because it's such a basic and plain difference that a first-grader would recognize it.

about three weeks ago
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Microsoft's Nokia Plans Come Into Better Focus

Rhywden Re:Sigh, that's another waste of time then. (149 comments)

One of the reasons the iPhone and iPad have done so well courting application developers is that Apple tries to keep everyone marching in formation, moving the platform forward without leaving current customers too far behind.

Well, that's easy to do if you control both the hardware and the OS. That's not an option for anyone else.

about three weeks ago
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Critroni Crypto Ransomware Seen Using Tor for Command and Control

Rhywden Re:Angler PC malware? (122 comments)

You're wrong. The Windows 8.1 app store does include traditional desktop apps. They're rare but the Adobe Reader XI is in the store.

Also, Microsoft can't very well force companies to only publish through their store...

about a month ago
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Russia Prepares For Internet War Over Malaysian Jet

Rhywden Re:Propaganda won't help this time (503 comments)

Actual war zones?

  • Let's see: RH 827, 1979 by Simbabwian rebels.
  • IR 655, 1988. This was an Iranian airplane during the Iran-Iraq-War. I'm not quite sure how you think that an Iranian plane can avoid flying over Iran?
  • 9XR-NN, 1994. The jet of the Ruandian president. Again, how is a Ruandian airplane supposed to avoid Ruanda?

That's about all civilian airliners shot down during an actual war. I'm counting 3 so far. Unless, you also count the Cold War as a hot war.

about a month ago
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Russia Prepares For Internet War Over Malaysian Jet

Rhywden Re:To whoever did this (503 comments)

And sometimes they are exactly that.

about a month ago
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Russia Prepares For Internet War Over Malaysian Jet

Rhywden Re:Propaganda won't help this time (503 comments)

Whatever. As I said, I'm not a native speaker and to determine affinity towards one side or the other merely through the usage of an article strikes me as foolishness at best.

It actually reminds me of the Jehovah-scene from Life of Brian.

about a month ago

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