Slashdot Mirror


User: Ken_g6

Ken_g6's activity in the archive.

Stories
0
Comments
644
First seen
Last seen
Profile
(view on slashdot.org)

Comments · 644

  1. Re:Binoculars on Slashdot Asks: Cheap But Reasonable Telescopes for Kids? · · Score: 1

    I got a pair of good 7x50 binoculars. As a side-benefit besides astronomy, I call them my night-vision scopes. When I look through them at dusk at terrestrial objects, everything I see looks brighter! You won't see the landscape when it's pitch black, but it's a surprising difference for unpowered optics.

  2. Cheap helpers for cheap scopes on Slashdot Asks: Cheap But Reasonable Telescopes for Kids? · · Score: 2

    Let's assume you got a cheap telescope. What can you do to make it work better for you?

    1. Get astronomy software. Someone else mentioned Stellarium; I guess that's the go-to PC software now. I don't know what's available for phones. But make sure it shows an object's altitude in degrees.
    2. Get a red flashlight. I guess these days people use red LEDs; back when I was a kid the place to go was army surplus for those bent army flashlights with colored filters.
    3. Get a protractor. It's cheap, it's plastic, it shows degrees, and it's probably on sale now for back-to-school.
    4. Get a piece of thin string and a weight, such as a nut for a bolt.

    Tie the piece of string through the center hole on the protractor, and tie the other end to the weight. Now tape the protractor to the body of the telescope, preferably along some piece that sticks out near the tripod so it's aligned properly. To get an object in the scope, find its current altitude on your astronomy software. Then tilt the scope so the string's position matches that altitude on the protractor, using the red flashlight to see the string and protractor. You might have to do some math to get the matching number on the protractor. (90-x degrees - see, kids, that's what math is good for!) Now you mostly have to pan the scope, which is usually easier than tilting.

    One other idea that came to mind while writing this: Take the jack stand out of your car, tape it to one leg of the tripod, and you might be able to use that for fine tilt adjustments. I've never tried this idea, though.

  3. Well, that's bad news... on Cause of Global Warming 'Hiatus' Found Deep In the Atlantic · · Score: -1

    Because there was no actual "hiatus". The poles were warming (on the surface, as opposed to 1,500m down) when the rest of the Earth wasn't. So this means global warming is actually accelerating by quite a bit.

  4. Re:Expert?? on Is Storage Necessary For Renewable Energy? · · Score: 1

    He also doesn't get that even at a local level things like AC compressors are already averaged out and that delaying the timing of starts really makes almost no difference at the neighborhood level, much less a town level.

    Averaged-out appliances are what you want with baseload generation. With fluctuating renewables, you want to be able to delay a significant fraction of appliances at the same time, for short periods when the generation is low, and start a significant fraction of appliances at the same time when generation is high. To do this, the appliances have to somehow receive a signal of when to start and when not to start, such as a price signal or a direct control signal from a utility. Users would still be able to have control, but could save money by sacrificing some control.

  5. To parody Dragonheart... on The Flight of Gifted Engineers From NASA · · Score: 1

    They've always wanted to fly. Now they want to flee!

  6. They're missing a lot of emissions on Brookings Study Calls Solar, Wind Power the Most Expensive Fossil Alternatives · · Score: 1

    I notice that only gas is listed as adding new emissions. But hydro has methane emissions from the vegetation that's flooded when the dam is constructed. Not to mention the concrete that makes the dam. Solar, wind, and nuclear also have some building emissions costs, unless you replace all construction vehicles with electric and find a way to make concrete and steel without carbon emissions. (Wood might be an alternative for certain parts of wind turbines and maybe even solar frameworks.) Gas should probably have much higher emissions too, as the whole infrastructure from the well to the power station leaks methane. (How much is debated, but it's not zero.)

  7. Re:cute company name does it all on Xiaomi Arrives As Top Smartphone Seller In China · · Score: 2

    Even better, the name is pronounced like the English "show me". (Click the listen button on Google Translate.) Which should be easy to spin into a very visual English ad campaign.

  8. Re:Wouldn't electric cars have the opposite effect on Why Morgan Stanley Is Betting That Tesla Will Kill Your Power Company · · Score: 4, Insightful

    Solar panels are no joke. They're already out-competing all other forms of electricity on price in some places in the USA.

  9. Re:You're welcome to them. on Comparison: Linux Text Editors · · Score: 1

    I use GVim all the time. It can "highlight syntax and auto-indent code...spellcheck documents... [and] record macros". I don't see the point of managing code snippets - if you're using the same code multiple places you should take a DRY-er approach. And being an IDE is for Emacs people. ;P

  10. They've wanted to end anonymity for a long time on UK Government Report Recommends Ending Online Anonymity · · Score: 2

    Since at least The Federalist Papers. I'm glad they didn't succeed then, and I hope they don't succeed now.

  11. Re:So, 40 years and beeelions spent.. on Opportunity Rover Sets Off-World Driving Record · · Score: 1

    The moon is much closer to Earth than Mars. It's so close that we can pilot vehicles on the moon manually, like an RC car, with just a two-second delay. Vehicles on Mars need to be a lot smarter.

    That said, Opportunity is really slow. Its top speed is 50 mm/s, or .1 MPH. I think Curiosity is actually slower. Maybe one of these private space ventures like Elon Musk's SpaceX can send up a fast (minimum 5 MPH or 2,200 mm/s) rover that just drives and takes pretty pictures.

  12. CPU time for charity on Ask Slashdot: What Would You Do With Half a Rack of Server Space? · · Score: 1, Insightful

    If you think good will for your company would go further than a few cryptocoins, you could do World Community Grid.

  13. I found an Android app for Tor about a year ago. Haven't checked since.

  14. Re:Is there a similar system in humans? on Genetically Modifying an Entire Ecosystem · · Score: 2

    "It has been suggested that CRISPR interference systems in prokaryotes are analogous to eukaryotic RNA interference systems, although none of the protein components are orthologous.[58]"

  15. How similar is your AI boss to the fictional Manna on Interviews: Ask Dr. Andy Chun About Artificial Intelligence · · Score: 2

    Dr. Chun,

    Have you read a short story about an AI boss called Manna? (I'll include relevant quotes if you don't have time.) How does your system for the Hong Kong subway compare? It's clearly similar to your subway system in some ways:

    At any given moment Manna had a list of things that it needed to do.... Manna kept track of the hundreds of tasks that needed to get done, and assigned each task to an employee one at a time.

    But does it micro-manage tasks like Manna?

    Manna told employees what to do simply by talking to them. Employees each put on a headset when they punched in. Manna had a voice synthesizer, and with its synthesized voice Manna told everyone exactly what to do through their headsets. Constantly. Manna micro-managed minimum wage employees to create perfect performance.

    Does it record employee performance metrics and report them to (upper) management like Manna?

    Version 4.0 of Manna was also the first version to enforce average task times, and that was even worse. Manna would ask you to clean the restrooms. But now Manna had industry-average times for restroom cleaning stored in the software, as well as "target times". If it took you too long to mop the floor or clean the sinks, Manna would say to you, "lagging". When you said, "OK" to mark task completion for Manna, Manna would say, "Your time was 4 minutes 10 seconds. Industry average time is 3 minutes 30 seconds. Please focus on each task." Anyone who lagged consistently was fired.

    And how have employees reacted to their AI boss - if, in fact, you have been able to get honest evaluations from employees?

  16. It's here already? on The AI Boss That Deploys Hong Kong's Subway Engineers · · Score: 3, Insightful

    Is it called Manna?

  17. Re:Illegal and Dangerous? on The View From Inside A Fireworks Show · · Score: 1

    Or worse, if the copter crashes into fireworks on the ground waiting to go off. Kaboom!

  18. Re:1990 called on Philips Ethernet-Powered Lighting Transmits Data To Mobile Devices Via Light · · Score: 1

    Raised again.

    The initial plan called for a ditch and wall with 80 small gated milecastle fortlets, one placed every Roman mile, holding a few dozen troops each, and pairs of evenly spaced intermediate turrets used for observation and signalling.

    And more details on another page:

    Each tower was in sight of the next in the line, and a simple system of semaphore signalling was used between them.

  19. Re:What could possibly go wrong on Update Your Shelf: BitLit Offers Access To Ebook Versions of Books You Own · · Score: 2

    My phone is so cheap it doesn't have a flash, you insensitive clod!

  20. S-s-synthehol? on CDC: 1 In 10 Adult Deaths In US Caused By Excessive Drinking · · Score: 1
  21. Doesn't mean it's not quantum on Test: Quantum Or Not, Controversial Computer No Faster Than Normal · · Score: 1, Insightful

    This could mean that D-Wave isn't quantum. Or it could mean that quantum computing in general isn't faster than normal computing. I seem to recall some physicist making a bet that quantum computing would be proved equivalent to classical computing.

  22. Replace it with a carbon tax on 2 US Senators Propose 12-Cent Gas Tax Increase · · Score: 1

    IIRC, I calculated once that a carbon tax raising the same revenue as the gas tax would result in a 5c/gallon gas tax. (And taxes on other things.) So raising the desired amount of revenue with a carbon tax would still lower the gas tax to about 9c/gallon.

  23. Re:Goodbye 1Click on US Supreme Court Invalidates Patent For Being Software Patent · · Score: 1

    So, that leaves something like 1-Click subject to patent claims as a "business method", but according to the above ruling, there is an argument that it lacks sufficient substance as a method to be patentable.

    Thus, someone needs to attack "business method" patents and obtain a similar ruling.

    Well, that's the question, isn't it? I don't think this completely invalidates "business method" patents.

    This is an extension of the argument that "$process on a computer" is not patentable separately from $process. A previous ruling said that if $process was already patented, "$process on a computer" did not constitute a new patent. This ruling says that if $process is not defined specifically enough to be patented, then "$process on a computer" does not add enough specifics to make the whole process patentable.

    So, I think that leaves something like 1-Click subject to patent claims as a "business method", because it is sufficiently specific: The business identifies you, stores your payment info and address, and both charges you and ships stuff to you with one action. To invalidate it would require a similar process in use before the patent, whether or not it used a computer.

  24. I take something else from the study on Humans Not Solely To Blame For Passenger Pigeon Extinction · · Score: 4, Interesting

    In discussion about potentially cloning passenger pigeons, there were concerns that the species needed huge flocks. As a result, there were concerns that cloning just a few wouldn't be enough to bring back the species.

    Since this study showed that passenger pigeons had population crashes before and came back, this should alleviate the flock size concerns.

  25. Re:What alien would think to look here? on Aliens and the Fermi Paradox · · Score: 1

    It seems you haven't read this: http://science.slashdot.org/st...

    Huh, I either didn't read that or discounted it. Something similar happens in our own solar system. A planet either needs a thick atmosphere (Venus) or a strong magnetic field (Earth) or it loses most of its atmosphere (Mercury, Mars). And I think tidal locking could be an advantage, preventing wild climate swings.