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User: thinkwaitfast

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  1. Re:Hmmmmmmm on JAXA Successfully Tests Its D-SEND Low-Noise Supersonic Aircraft · · Score: 1

    They do and there was a demonstration of this about ten years ago.

  2. Re:Is that even worthwhile? on GasBuddy Has a New Privacy Policy (Spoiler: Not As Customer Friendly) · · Score: 1

    It was a major milestone in my life when I realized I could make a dollar at work for holding my breath one minute. My first job I would have had to work hard labor for half an hour to get one dollar.

  3. Re:We're going to need a GPS-like system there... on NASA's Drone For Other Worlds · · Score: 1

    Such as? What requires 30m accuracy in the fog? GPS is mostly used for not getting lost and we already know where all the landers/rovers are down to a few centimeters. GPS also needs constant updating from fixed ground stations due to satellite drift.

  4. Re:Why go without GPS? on NASA's Drone For Other Worlds · · Score: 1
    GPS is nice when you are trying to drop a shell down an enemy gun barrel, but not required when driving off road. IRUs have worked well (and still do) in commercial aircraft.

    And why aren't rovers considered drones? They are semi autonomous vehicles with rudimentary obstacle avoidance and steering.

  5. Re:LOL - there is no such thing as 'vaccination'.. on Ebola Vaccine 100% Successful In Guinea Trial · · Score: 2

    You can be treated for rabies after you been infected. Pets are routinely given rabies shots after an encounter with a wild animal even when they are currently vaccinated.

  6. Re:16 out of 2380 on Ebola Vaccine 100% Successful In Guinea Trial · · Score: 1

    Africa can feed itself. It could feed the entire world if it wasn't full of thousands of waring gangs (tribes) with over 60% of the arable land on the planet.

  7. .55wh or 2kJ on Japanese Scientists Fire the Most Powerful Laser On the Planet · · Score: 1

    --
    Filter error: You can type more than that for your comment

  8. Re:How? on Robots Must Be Designed To Be Compassionate, Says SoftBank CEO · · Score: 1

    And how, exactly, does one program a robot to be compassionate or empathetic?

    There's an opcode for that. Duh. Set the compassion bit or clear it to be a jerk.

  9. Re:Why animals can't be given human rights. on NY Judge Rules Research Chimps Are Not 'Legal Persons' · · Score: 1

    When I was in Tanzania, I met a guy (a hired security guard for a school) who'd killed a lion a few days earlier. Lions eat people for real there. The wild and all. Something like 50-100 deaths per year.`

  10. Re:Sounds Great on The Biohacking Movement and Open Source Insulin · · Score: 1

    Those can only stop you from selling, not for personal use. AFAIK, the FDA isn't stopping me from mixing bleach and ammonia and drinking it for fun (or whatever).

  11. Re:Biohacking? on The Biohacking Movement and Open Source Insulin · · Score: 1

    From the /. way (way) back machine...are you familiar with the AFDB?

  12. Re:Electric is Evolution. Driverless is Revolution on Are We Reaching the Electric Car Tipping Point? · · Score: 1

    And what are those advances other than LiPo batteries (~1990) and computer controlled alternators (brushless motors)?

  13. Re:quickly to be followed by self-driving cars on Are We Reaching the Electric Car Tipping Point? · · Score: 1

    Buy small house in good area. Pay it off soon. Sell. Buy bigger house for not a lot more than what you sold your last one for. Repeat.

  14. Re:quickly to be followed by self-driving cars on Are We Reaching the Electric Car Tipping Point? · · Score: 1

    the "archaic" practice of owning your own home?

    Don't laugh, there are many people pushing for this.

  15. Re:Why not both? on Sharp Announces Sales of DC Powered Air Conditioner, Other Products To Follow · · Score: 1

    Inverters have a lifespan of ~10 years. There are no moving parts so killer is heat. If you run 1000w through a 93% efficient inverter, you generate 70w of heat. Running 100w generates 7w of heat. If your inverter is rated at 1000w it is built with 70w heat dissipation in mind. If you have a 5kw inverter, it would be built with 350w of cooling so running 1000w (70w of heat, 350w of cooling) will remain much cooler providing longer life.

  16. But buck converters do operate by converting to high-frequency AC internally, running it through a transformer (higher frequency = smaller transformer), then back to DC.

  17. Re:Disappointed on Sharp Announces Sales of DC Powered Air Conditioner, Other Products To Follow · · Score: 1

    They have them, but the converion process requires some amount of energy storage which can't be done at wafer scale without dielectric breakdown.

  18. Re:What Voltage? on Sharp Announces Sales of DC Powered Air Conditioner, Other Products To Follow · · Score: 1

    Maximum Power Point Tracker. The more current you draw, the lower the voltage. Since P(V,I) = ~V x I(V), you want to operate at the voltage that maximizes the power (at the first stage off of the solar panel). Once you have the energy stored (in a capacitor or inductor), you can convert it to whatever level you need.

  19. Re:Why not both? on Sharp Announces Sales of DC Powered Air Conditioner, Other Products To Follow · · Score: 1

    High voltage only saves you on resistance losses. There are still inductive and capacitance losses with AC that you can't avoid.

  20. Can't be that clever; I had the idea 20 years ago when I first learned of bang-bang controllers

  21. Re:Define "drone" on US Navy Tests 3D Printing Custom Drones On Its Ships · · Score: 1

    Some people make them out of sticks and superglue.

  22. Re:Seems silly. on US Navy Tests 3D Printing Custom Drones On Its Ships · · Score: 1

    They should check out http://flitetest.com/. These guys pop out new drones in minutes with no need for for a 3d printer.

  23. Re:Even party schools get top notch talent on Researchers Demonstrate the World's First White Lasers · · Score: 1
    I attended that school (and department) also and can only count maybe 5 parties in as many years. As teachers would say, you get out of your education what you put into it.

    They had great equipment thanks to major facilities of Intel and Motorola being two miles away.

  24. Re:I wish I could buy GMO seeds on Genetically Modified Rice Makes More Food, Less Greenhouse Gas · · Score: 1

    The modern environmental movement is a religion.

  25. Re:Well, sure, but... on Genetically Modified Rice Makes More Food, Less Greenhouse Gas · · Score: 1

    That leaves you eating 5lbs of potatoes or a pound of bacon everyday to get up to 2,000 calories. Or 25lbs of tomatoes.