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Comment Re:Hydrogen is a form of storage and not a good on (Score 2) 201

by arth1 (#57993770) Attached to: How Orkney Leads the Way For Sustainable Energy

Hydrogen has about 142 MJ per kg, about 3X that of diesel and gasoline. Which themselves are about 25X that of LiPo batteries (the best, mass-producible rechargeable batteries out there). Making hydrogen about 75X the energy density of the best battery packs.

Except that the same mass of hydrogen takes up a HECK of a lot more volume.
And once you factor in the mass of the containers and other hardware needed to secure hydrogen, the advantage per mass is no longer as clear either.

Comment Srsly? (Score 2, Insightful) 384

by arth1 (#57988204) Attached to: 'I Got Death Threats For Writing a Bad Review of Aquaman'

"I worry that reading volumes of hate mail is starting to get in my head and cause me to consider the potential angry male ramifications while I'm writing my reviews, thereby compromising my integrity."

What does the word "male" do in that sentence except adding sexism? Does it matter what gender the hate mailers have?

Comment Re:Interstellar probe? (Score 1) 583

It's entirely possible that "aging" doesn't exist for species outside our solar system (if such aliens exist).

Immensely improbable, I would think. Without replacing the old with potentially better adaptations, there is no evolution, and it's hard to see how a "species" stage can be reached in the first place.

Comment Re: Interstellar probe? (Score 1) 583

C is a fancy, unamerican way to measure temperature. Speed of light is c.

You must be American.

1: C is Coloumb, the SI unit for electric charge. (Degrees Celsius always needs the degree sign.)
2: It's not c, it's c.
3: It's not the speed of light, it's the speed of light in vacuum. The "in vacuum" part is very significant.
Earth

Only Nuclear Energy Can Save the Planet (wsj.com) 569

Posted by msmash from the closer-look dept.
Joshua S. Goldstein, a professor emeritus of international relations at American University, and Staffan A. Qvist, an energy engineer and consultant, writing for The Wall Street Journal: Climate scientists tell us that the world must drastically cut its fossil fuel use in the next 30 years to stave off a potentially catastrophic tipping point for the planet. Confronting this challenge is a moral issue, but it's also a math problem -- and a big part of the solution has to be nuclear power. Today, more than 80% of the world's energy comes from fossil fuels, which are used to generate electricity, to heat buildings and to power car and airplane engines. Worse for the planet, the consumption of fossil fuels is growing quickly as poorer countries climb out of poverty and increase their energy use. Improving energy efficiency can reduce some of the burden, but it's not nearly enough to offset growing demand.

Any serious effort to decarbonize the world economy will require, then, a great deal more clean energy, on the order of 100 trillion kilowatt-hours per year, by our calculations -- roughly equivalent to today's entire annual fossil-fuel usage. A key variable is speed. To reach the target within three decades, the world would have to add about 3.3 trillion more kilowatt-hours of clean energy every year. Solar and wind power alone can't scale up fast enough to generate the vast amounts of electricity that will be needed by midcentury, especially as we convert car engines and the like from fossil fuels to carbon-free energy sources. Even Germany's concerted recent effort to add renewables -- the most ambitious national effort so far -- was nowhere near fast enough. A global increase in renewables at a rate matching Germany's peak success would add about 0.7 trillion kilowatt-hours of clean electricity every year. That's just over a fifth of the necessary 3.3 trillion annual target.

Comment Re:router reset (Score 1) 141

Router logs differ depending on the router, and what it's configured to do. There's no set format for what a router logs or how; it depends on the router OS, model and configuration.
Changes in routing information would normally go in router logs, along with information on packets that cannot or would not be routed, and interfaces that go up or down.

"A station associated" seems to me to be an access point log, not a router log. (Granted, these days some call everything a "router", much like they called every computer a "cpu" or "hard drive" in the past.)

Comment Re: All sides of the argument. (Score 2) 227

No, that's truths, not facts. "This court finds it to be true that ..."
A truth, as far as a court is concerned, is what is likely, either "upon preponderance of evidence" or "beyond reasonable doubt". It does not require or establish fact, only truth.
If they were facts, we would not need courts.

Comment Re:Wait a damn sec (Score 1) 141

Well, maybe they have considered it. But maybe the bomber isn't very tech savvy and doe not know how to do that or got sloppy. The MAC address seems like a reasonable lead to follow.

In that case, the reasonable cause of action would be to ask Motorola which device model had this particular MAC address, and where it was sold, and then follow it through the serial number to the buyer.
I can only presume that they have tried and failed this, and that's why they're asking.

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