dpierce9

24 ms·

211.
by dpierce9 12y ago
Power is almost always more expensive in the middle of the day. You can see this if you look at the energy component of the hourly electricity price (day ahead or real time) for any of the organized electricity markets (though you aren&#x27
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by dpierce9 12y ago
I think the 70% number includes inefficiencies associated with the generation cycle. A coal plant efficiency is around 35-40% subtract off transmission losses and you are close.
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by dpierce9 12y ago
There is also an implicit government subsidy on coal and gas plants: Not charging them for the externalities they produce namely carbon, mercury, and the other radioactive isotopes they release into the air (not to mention all the water the
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by dpierce9 12y ago
The Air Force was also seriously against permissive action locks. When forced to add them, the generals made the launch codes the same on every warhead, all zeros. Command and control is very hard: being able to always and immediately launc
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by dpierce9 12y ago
Most residential solar installations in the US are grid tied, meaning that excess generation heads out onto the grid (this is counted as a credit under net-metering regimes). This explains why AC inversion is required. Since most solar prod
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by dpierce9 12y ago
A bit of background: Hume was an empiricist, he thought that knowledge of the world comes from our experience of the world (i.e. experimentation) along with logical reasoning. But he was also concerned about the relationship between experie
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by dpierce9 12y ago
There is also no requirement for consistency in the constitution. Of course, we could amend it to add one.
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by dpierce9 12y ago
I agree that you can model a multi-valued logic system on a universal Turing machine but you are wrong to think that doing this is the same as mapping to classical logic. TMs do not intrinsically follow the rules of classical logic, rather,
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by dpierce9 12y ago
There are definitely other ways to handle this same problem, I was just pointing out one counterintuitive conclusion of classical inference rules as one motivation for non-classical logics. And, since both of your examples also involve non-
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by dpierce9 12y ago
It is simply not true that multi-valued logics collapse into two-valued logics. While it is true that you can assign indeterminate statements {true,false} and call it a third value, logic is more than assignments of truth-values to statemen
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by dpierce9 12y ago
This is simply the cable tv model applied to internet services. Cable went from pay to avoid ads to pay and still get ads (and of course there is Hulu). These guys just figured out how to double dip in a really subtle way.
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by dpierce9 13y ago
Wouldn't it be better to use a rolling window rather than monthly distribution for anomaly detection? One might expect more anomalies in the shoulder months using the monthly distribution.
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by dpierce9 13y ago
Lewis's book examines one kind of HFT, argues that it is objectionable, and takes a look at one method of mitigation. Where this bites is that this HFT method is super common and relatively common knowledge to insiders but not outsider
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by dpierce9 13y ago
^This. In many cases, agencies cannot simply stop printing because they are legally required by congress to put stuff on paper. Agencies cannot compel congress to fix badly written legislation but they can change their default font. Where I
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by dpierce9 13y ago
Not to pile on, but even if you disaggregated student loans on a per-individual basis, this graph would still be misleading because it does not include a line for the median wage of non-bachelor holders over the same period. In general, to