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User: ChrisMaple

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  1. Re:8%? Why, that's more than half as good as octan on Buckyballs Can Store Concentrated Hydrogen · · Score: 1

    Considering gasoline as octane is a good approximation for many purposes, one of which is hydrogen fraction.

  2. Re:Not New News on Questions Arising On Mercury In Compact Fluorescents · · Score: 1

    For most healthy people, the mercury in CFL bulbs is not a problem. As a child, I had a small amount of mercury which I rubbed on pennies to make them look like dimes, and I played with it in other manners. I had at least 2 friends who did the same. No harm. Some people may be sensitive to mercury, but the general fear expressed so commonly today is nothing but a phobia.

  3. Re:LED lighting on Questions Arising On Mercury In Compact Fluorescents · · Score: 4, Informative

    Single LEDs without phosphor coating are moderately narrowband. Phosphor-coated LEDs can have a smooth, broad spectrum like daylight, as can a combined assortment of LED colors. Varying the chemistry of LEDs allows them to be tuned to any visible peak wavelength.

  4. Re:Hooray for Ozone generators! on Silent Microchip 'Fan' Has No Moving Parts · · Score: 1

    A brushmotor might create ozone, but at low voltages it's not likely to make a significant amount. If it's an induction motor there need be no exposed wires; there's not going to be measurable ozone.

  5. Re:What is the maximum achievable efficiency? on New X-Prize for Fuel Efficient Cars Announced · · Score: 1
    Oops! Sorry, "the article" I referred to was something linked to by another poster.

    http://www.motherjones.com/news/feature/2007/01/king_of_the_hypermilers.html

  6. Re:What is the maximum achievable efficiency? on New X-Prize for Fuel Efficient Cars Announced · · Score: 1
    It depends too heavily on available technology and what is considered adequately practical to provide a maximum figure for MPG. At highway speeds for most cars, air drag dominates losses. Air drag could be reduced by a factor of ten, but the resultant shape would not be practical and it probably wouldn't be safe. Tire drag is significant, but improved tires have some disadvantages and steel wheels on rails aren't practical. More efficient engines and better use of the engines is an area for improvement, but even perfect engines won't give more than a 5X improvement. Gear losses also factor in, but there's only a few percent available there.

    The article mentioned figures of 200 MPG for aggresive use of existing production technology at speeds where air drag isn't much of a factor. I'd guess you could double that with tech advances.

    One problem is that hills and snow can't be removed by improved technology, and practical driving will never approach what can be achieved on a flat, ideal course.

  7. Re:Three Wheels? on New X-Prize for Fuel Efficient Cars Announced · · Score: 1

    Do training wheels count?

  8. Re:environmentally friendly? on New X-Prize for Fuel Efficient Cars Announced · · Score: 1
    "Environmentally friendly" can mean whatever any storyteller wants it to mean. For example, the environment is what exists now, so any change, for better or worse, is environmentally unfriendly. For another, I prefer the environment inside a warm house to the center of a big forest in an ice storm; I regard the house as the more environmentally friendly option.

    If you had to say what you actually mean (which seems to be "I prefer squirrels to healthy, happy humans.") your arguments wouldn't appeal to many people.

  9. Re:Already there, if you drive it right on New X-Prize for Fuel Efficient Cars Announced · · Score: 1
    Small cars need neither power steering nor power brakes. I drove a 1966 Corvette with neither, and it weighed over 3000 pounds. Modern 4 passenger cars can weigh 2000 pounds; all it takes is good design to reduce effort to reasonable levels.

    Some production cars have been produced which turn off the engine at stops automatically. Hybrids are designed to turn off their ICEs and run off batteries as appropriate.

    Mostly, turning off the ignition while driving is a skill that can be used by an attentive driver under good conditions. He qualifies, but it's pretty obvious that he's overdoing it. People's time has an economic value that can be counted against slow driving.

    That something is illegal doesn't make it wrong.

  10. Defective hardware on The REAL Reason We Use Linux · · Score: 1
    I have a Matrox Marvel G200 that doesn't work properly under Windows, but works under Linux.

    Linux allows easy creation of powerful shell scripts that I rely on daily.

    Availability of most source code has made it possible to modify and/or fix some programs.

  11. Re:'All powerful' root? on The REAL Reason We Use Linux · · Score: 1

    This happens to me about twice a week, both with a 2.4 kernel (Red Hat 8) and 2.6 (Fedora Core 6). updatedb hangs and can't be killed. I'd guess I have a flaky drive or controller. umount doesn't work, but I haven't tried umount -f or umount -l yet. It's a problem because I can't shutdown until updatedb ends, perhaps because I can't shutdown until all drives are unmounted. If I let the computer run several days, several instances of updatedb will stall and none of them can be killed. Eventually they take up more CPU cycles and response suffers.

  12. Re:VHF? on Hobbyists Create GPLed DIY Super TV Antenna · · Score: 1

    My impression from the article is that the VHF performance of the UHF antenna is poor. My guess is that it would have no better than 3 dB gain (like an ordinary dipole) and possibly less, since impedance mismatch would probably be substantial. If you scaled up the size to the dimensions required for VHF performance, you would have an inconveniently large antenna with bandwidth barely adequate for one of the two portions of the VHF TV band.

  13. Re:Meanwhile... on Clinton Takes Ohio, Texas; McCain Seals The Deal · · Score: 1
    That the government has monopolized roads doesn't mean that there can't be private roads. Railroads have built bridges for more than 100 years, those bridges aren't government-owned.

    I flush my toilet into a cellpool, not a government sewer.

    Police only coincidentally contribute to safety, and courts have repeatedly ruled that the police have no legal responsibility to protect anyone.

    All your other examples are just as easily contradicted, and it is particularly curious that you cite obvious government failure (bridge collapse) as a reason to support government.

  14. Re:You'd think... on Clinton Takes Ohio, Texas; McCain Seals The Deal · · Score: 1
    With regard to Obama, saying "I've got these wonderful ideas for change" does not make the ideas wonderful. His expressed economic ideas will destroy the economy.

    Bill Clinton's era was economically successful primarily because he lucked into the internet explosion. He also was a free trader (good) and made a brilliant move to shift to short-term borrowing while interest rates were falling. His other policy initiatives were mostly disastrous and fortunately thwarted by a Republican congress.

    Hillary is not Bill. Her policies are a secondary concern. She is a nasty person whose election would endanger our lives, our freedom, and our representative government.

    McCain is no bonus. He's too willing to fight, and has no respect for Constitutional rights. He might be a budget cutter, which is good. If he's elected, we'll continue our 200 year stagger toward despotism at a slower rate than if one of the Democrats becomes President.

  15. Re:why is texas a win for her? on Clinton Takes Ohio, Texas; McCain Seals The Deal · · Score: 1

    Ayn Rand was explicitly not an anarchist, and the complaints you make apply to anarchy. An Objectivist's government's reason for existence is the protection of individual rights, and nothing else.

  16. Re:It's all the aggressive drivers... on Experiment Shows Traffic 'Shock Waves' Cause Jams · · Score: 1

    In crowded areas signalling a lane change alerts the driver you're about to move in front of to close the gap so that you can't make the lane change. This provides a disincentive to signalling.

  17. Re:They need to earn foreign exchange... on Comparing the OLPC, Classmate and Eee · · Score: 1

    Say you want to build a road. Well, you need a bulldozer.
    I've seen the photographs that Julius Caesar took of the bulldozers building the Appian Way.
  18. Re:ban children on Strict Order Boarding Would Get Planes in the Sky Faster · · Score: 1

    If you pay to put your spawn through school you might have a point, if you disregard the immorality of force.

  19. Re:Not Faster on Strict Order Boarding Would Get Planes in the Sky Faster · · Score: 2, Insightful
    The situation with regard to energy companies is complicated by politics, both domestic and international. Exxon maximizes profits successfully by operating efficiently in an atmosphere where much of the raw material price is determined by foreign governments and selling price is determined by high demand. IIRC Exxon produces a lower fraction of its raw material than several of its retail competitors, and of course less than those who don't sell retail. (I'm emphasizing that Exxon is not in control of their raw material prices.)

    Different industries take different times to build capacity, and the reaction of prices and profits vary accordingly. Anyone with a lot of money can start an airline very quickly; there are many airplanes not being flown. Getting a new source of petroleum on line is a multiyear process.

  20. Re:dual boarding more efficient? on Strict Order Boarding Would Get Planes in the Sky Faster · · Score: 1
    Airlines occasionally overbook, and are sometimes are unaware of it. Get on quickly, get your seat, you fly. Get there late, you're on the next flight, if any.

    People will also abuse their underseat storage privileges. Get there first if you don't want to lose yours.

  21. Duh on Large Sheets of Carbon Nanotubes Produced · · Score: 1

    Pulled up toward the mass well above the synchronous orbit altitude, by centrifugal force, not gravitational force.

  22. Re:I'm not so sure on VW Set To Release Diesel Hybrid · · Score: 1

    Where I live diesel is currently selling for about 20% more than gasoline. Diesel price has been slowly rising w.r.t. gasoline over the last few decades. There isn't any net savings and it isn't likely to get better.

  23. Simpler explanation? on More Spacecraft Velocity Anomalies · · Score: 2, Informative

    The article has little information about what types of trajectories are affected, so this is just wild guessing. If the orientation of solar panels or dish antennas are markedly different for different trajectories, drag from particles or acceleration from absorbing/reflecting solar radiation can also differ. There's more garbage in the plantary plane, so there's more drag and more blocking of solar radiation.

  24. Re:Nanoparticles Could Make Hydrogen Cheaper Than on Nanoparticles Could Make Hydrogen Cheaper Than Gasoline · · Score: 1

    Pony-shaped hydrogen balloon, available for 25,000 drachma from the Trojan Balloon Works, division of Homer Industries.

  25. Re:Depression not natural? on Antidepressants Work No Better Than a Placebo · · Score: 2, Insightful

    Regardless of whether there is an external cause of depression, drugs can sometimes make a depressed person feel less depressed. This is true even of a weak herb like St. John's Wort. If someone feels too depressed to get out of bed, an antidepressant can give him the mental boost to get up and solve his problems.