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Comment: E = (T2-T1) / T1 (Score 3, Informative) 114

by Animats (#46773857) Attached to: 'Thermoelectrics' Could One Day Power Cars

E = (T2-T1) / T1

Everyone with an engineering degree knows this. Trying to extract much energy from low-grade heat at the output end of an engine is inefficient. This was figured out a long time ago. Here it is in The Manual of the Steam Engine. It's possible to increase steam engine efficiency by compounding, where the exhaust from each cylinder feeds a larger, lower pressure cylinder. This is cost-effective up to about 3 cylinders ("triple expansion"). Engines up to quintuple-expansion have been built, but the additional power from the last two cylinders in the chain isn't worth the trouble.

Comment: Re:When will they gentrify the Tenderloin? (Score 1) 334

by Animats (#46773391) Attached to: San Francisco's Housing Crisis Explained

In 2005, this appeared in SF Weekly, about the gentrification of the Polk St. area of the Tenderloin:

Gay Shame calls the Lower Polk Neighbors Association a "brutal gentrification squad" of wealthy business owners, slumlords and bureaucrats.

"They are trying to transform Polk Street from the city's last remaining gathering place for marginalized queers and street culture into a hip destination for wealthy suburbanites," Mary said. "We want a safe place for marginalized people, and Polk Street has historically been that space.

"The neighborhood may soon be known more for green-apple mojitos and stretch Hummers than trannies and tweakers (methamphetamine users)."

That was back in 2005. Gentrification won.

Comment: Re:Kudos, Bill (Score 1) 129

by Rosco P. Coltrane (#46767705) Attached to: Bill Gates Patents Detecting, Responding To "Glassholes"

Glad to see there's someone out there that cares about privacy and is looking to do something about it!

Unless this was irony, no: Bill Gates doesn't care about privacy. He cares about profits.

All I see here is one company - Google - bringing misery to people with their surveillance equipment in disguise, and an individual trying to profit from the coming backlash. All in all, both are out to profit from you, but none have your interests at heart.

Comment: Re:A reason why they SHOULD have... (Score 1) 42

by drinkypoo (#46765409) Attached to: Ubisoft Hands Out Nexus 7 Tablets At a Game's Press Event

I actually picked up FOUR 7" Android 4.x tablets from DealExtreme for ~$35 each last year, during a half-price sale...and I doubt they'd let even such a sale as that rob them entirely of profits...

Dealextreme is like BG Micro. Sure, they buy stuff to stock and sell, but much of what they sell is some crap that someone else couldn't sell, which they got for a song. Just because DX got a bunch of tablets nobody wanted to buy in a store for $20/piece doesn't mean someone will sell you new, supported ones for that.

Comment: Re:When will they gentrify the Tenderloin? (Score 3, Interesting) 334

by Animats (#46764379) Attached to: San Francisco's Housing Crisis Explained

It's happening. First, take a look at a map of the Tenderloin, from "Areas to Avoid, San Francisco." Twitter HQ is in that area, between 9th and 10th on Market, and the long-standing "mid-Market area" around there is rapidly being rebuilt. In fact, just about everything south of McAlliister has been gentrified, except for parts of 6th St and a small section around 7th and the north side of Market. Rebuilding is underway along the Van Ness corridor too, and has more or less chopped a block off the Tenderloin on the west side. That's the old "Polk Gulch" area, once a gay rent-boy hangout.

So the SF Tenderloin is about half the size it was a few years ago. Progress continues.

Comment: Re:Mr Fixit (Score 1) 527

by drinkypoo (#46763325) Attached to: How Does Heartbleed Alter the 'Open Source Is Safer' Discussion?

We should remember that FLOSS reacted very quickly to the "revelation," but the bug itself has been sitting there for years, which isn't really supposed to happen.

Unfortunately, the very same thing happens in proprietary software. And "isn't supposed to happen" is a misunderstanding. It's just supposed to happen less, and it's supposed to get fixed easier. The latter, at least, has been proven out.

Never trust an operating system.

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