Slashdot Mirror


User: XNormal

XNormal's activity in the archive.

Stories
0
Comments
948
First seen
Last seen
Profile
(view on slashdot.org)

Comments · 948

  1. It's not fun to be a symbol of peace on China Worried About Terrorist Pigeons · · Score: 3, Interesting

    In 1988 Korean pigeons had a different unpleasant experience at the Seoul olympic games opening ceremony.

  2. Re:Burn to M-Disc on Ask Slashdot: What To Do After Digitizing VHS Tapes? · · Score: 1

    A blu-ray M-Disc is now available. Put them in a fire safe (e.g. this one.

    Even with just a single copy, I think this has a better chance of surviving the next 25 years than assuming that you will never fail to copy the data to the next hard disks before the old ones die over that entire period. Or that the cloud storage provider you choose will not go out of business.

    And you should be able to find readers for this. For some applications there is good reason to have some kind of storage medium that is completely passive and has no electronics as part of it. And unless something changes in the laws of physics it will probably be optical. While they may shrink is size over time, for archival use a 12cm disc seems like a convenient form factor, doesn't it? So I think these holographic nanodispersion dense wavelength multiplexing diffraction-limit beating wonders will still be be backward compatible with the ancient "blue ray" format.

  3. Re:"Dance" = rolling blackouts on Is Storage Necessary For Renewable Energy? · · Score: 1

    Shaving some of the *predictable* daily peaks is nice. It brings you closer to the base load demand and saves a bit at the margin.

    Responding to a sudden and *unpredictable* loss of a good fraction of your power generation capacity is no longer about shaving. I think the right term would be "amputation". The cost at which a large fraction of consumers would plan and respond by reducing their power demand is about the same as their losses from a blackout. This is no longer about optimization of resource use - it's about spreading the inevitable damage to those for whom it is slightly less painful (or those who simply have no choice because they cannot pay).

    This is way past the point of diminishing returns on overall benefit to society - unless you ascribe some value approaching infinity to your religious devotion to "renewable" energy and make everyone share this valuation by force.

  4. Re:"Dance" = rolling blackouts on Is Storage Necessary For Renewable Energy? · · Score: 1

    Large business consumers make very effective use of these incentives right now.

    The "incentives" required to produce such extreme changes in demand as required to meet the fluctuations in renewable energy production would have to be very harsh. Yes, you would probably turn off your air conditioner if it cost you $20 per hour. And some might consider it an effective use of incentives to manipulate demand. I'm not so sure how you would feel about such manipulations, though.

  5. "Dance" = rolling blackouts on Is Storage Necessary For Renewable Energy? · · Score: 3, Insightful

    This is about as valid as the claim that "the wind always blows somewhere". Actual power generation data shows that weather is a very large scale phenomenon and the wind most definitely slows to a tiny fraction of its average power over an entire continent.

  6. How does it compare to JPEGmini? on Mozilla Doubles Down on JPEG Encoding with mozjpeg 2.0 · · Score: 1

    JPEGmini is a proprietary implementation of the same concept : fully compatible implementation of a JPEG compressor that does better than libjpeg at the cost of much higher CPU use.

  7. Actual nicotine is also used as a pesticide on Harvard Study Links Neonicotinoid Pesticide To Colony Collapse Disorder · · Score: 2

    Actual nicotine is also used as a pesticide - in "organic" agriculture. I wouldn't be surprised if it has exactly the same effect if used at large scale.

  8. Re:Efficiency? on Toyota Describes Combustion Engine That Generates Electricity Directly · · Score: 4, Informative

    The conventional piston-and-crankshaft engine forces the variation of cylinder volume over time to follow a specific sinusoidal curve. This is not the most efficient way to convert the energy of a hot expanding gas to motion. Look at the third picture in the slideshow to see the power-over-time graph of the free piston engine to get an idea of how differently this engine runs.

    This fundamental difference in thermodynamic cycle performance makes the biggest improvement to the efficiency of this engine. It more than makes up for the inherent inefficiencies in converting the mechanical motion to electricity and back. Using electricity lets you use capacitors and batteries to smooth that spiky but efficient power production to a a smooth supply for the electric motors.

  9. Nucular power on WHO: Air Pollution 'Killed 7 Million People' In 2012 · · Score: 2

    Take a look at this graph: Nuclear Electricity Production. It's quite easy to spot 1986 on this graph (Chernobyl). That's where the trend of acceleration in nuclear power growth has reversed into deceleration. No such reversal has occured in demand for electric power, of course. The shortfall has been largely picked up by coal.

    The number of people that have been killed by air pollution from coal as an indirect result of the nuclear stagnation after the Chernobyl accident is well into the millions.

  10. Sulfur-based polymer? on Sulfur Polymers Could Enable Long-Lasting, High-Capacity Batteries · · Score: 1
    In the 1960s there was research into sulfur-based polymers but apparently ran into some problems:

    "Recently we found ourselves with an odour problem beyond our worst expectations. During early experiments, a stopper jumped from a bottle of residues, and, although replaced at once, resulted in an immediate complaint of nausea and sickness from colleagues working in a building two hundred yards away. Two of our chemists who had done no more than investigate the cracking of minute amounts of trithioacetone found themselves the object of hostile stares in a restaurant and suffered the humiliation of having a waitress spray the area around them with a deodorant."

    http://pipeline.corante.com/archives/2009/06/11/things_i_wont_work_with_thioacetone.php

  11. Re:Would have walked away? on Dream Chaser Damaged In Landing Accident At Edwards AFB · · Score: 3, Funny

    And if he doesn't, well, we can rebuild him.

  12. ... and the easiest way for your government to comply with the treaty article about non-government entities is to simply to put in place a law disallowing it. Without a powerful lobby there will be no incentive for your government to set up the regulatory apparatus for legally enabling such activity. Any such regulation is likely to be tailored to the needs of the members of such a lobby, not to a small organization like yours. And if you are thinking of jurisdiction shopping (i.e. finding some government more friendly to such activities) remember that your government may decide that you are under their jurisdiction by being a citizen, regardless of where in the world you happen to be. Also, other countries (most notably the US) are likely to decide that if you are building anything with a range capable of reaching their territory in ballistic flight that makes it their business, too. They will find many creative ways to put pressure on other governments to stop you (see this for example).

    Good luck.

  13. Hardly news on Royal Navy Deployed Laser Weapons During the Falklands War · · Score: 2

    "The pity was that Plymouth had not had time to turn right around, because she was fitted with the new laser equipment known locally to us as "Flasher" - which could well have stopped the attack in its tracks, because it literally forces any incoming pilot to pull up sharply during the forty-second period in which he cannot see."

    from One Hundred Days by Admiral Sandy Woodward (1992)

  14. I've seen this demonstrated 15 years ago. on OmniCam360 Camera Cluster Lets You Choose the Viewing Angle · · Score: 3, Insightful

    The application was a video conferencing system. The omnidirectional camera had the exact same arrangement of mirrors and black baffles between them. It was placed in the middle of a conference table and the display was steered automatically by a microphone array that determined the direction of the speaker. This way you always got a nice framing of the speaker's head. It was essential for getting any kind of usable picture in a conference with multiple people back when bandwidth was limited and video compression was crappy. It would still be very useful today but I haven't seen this anywhere.

    http://worldwide.espacenet.com/publicationDetails/biblio?FT=D&CC=WO&NR=9847291A3

  15. I believe this is why monkeys are mentioned in the video as possible users of this interface:

    http://www.google.com/search?tbm=isch&q=japan+monkey+hot+springs

  16. What's next? on Eben Upton Muses on the Raspberry Pi, Scratch and, His Love For Parallela · · Score: 3, Funny

    In the back of your mind, you havenâ(TM)t got Raspberry Pi 2?

    No, not Pi 2. It must obviously be named 2 Pi.

  17. Re:How about distributing timezone info through DN on Oracle Discontinues Free Java Time Zone Updates · · Score: 1

    Not to mention great support for firewall traversal. It gets even into many places that HTTP does not.

  18. How about distributing timezone info through DNS? on Oracle Discontinues Free Java Time Zone Updates · · Score: 1

    DNS is a great protocol for distributing a relatively small piece of infrequently changing information to a very large number of clients. It has a global infrastructure of caches, supports delegation of authority. Sounds like a good match.

  19. Re:Will Tesla buy them? on Electric Car Startup 'Better Place' Liquidating After $850 Million Investment · · Score: 1

    Why would he bother? He has a successful company, why would he want to buy a company that burned through that much money with no noticeable product

    As a slashdotter, we are prone to having a bias of looking at everything as a technology development issue. But Better Place was an infrastructure project. They tried to minimize the development of any new technology. And infrastructure requires Big Money. Unfortunately, it was Big Money with the risk profile of a technology development startup. Ouch.

  20. Slower than the speed of light on Physicists Create Quantum Link Between Photons That Don't Exist At the Same Time · · Score: 1

    Superposition, wave function collapse and other quantum effects are supposed to govern everything. But I don't seem to recall any such weird experiments that do not involve any particle traveling slower than the speed of light.

    Are there any such demonstrations that involve only interactions between particles having nonzero rest mass?

  21. Informed consent on Ask Slashdot: Moving From Contract Developers To Hiring One In-House? · · Score: 1

    Make sure to explain the scenario to the contractor up front. In detail. More than once. Give them a chance to raise their offer to include this. Ask them again how certain they are about their ability to estimate their bug rate. Let them sign a separate page describing this in simple language.

    Have a process to clearly separate bugs that are covered by this from modifications for which they are paid separately. For some small things that are arguably not bugs but modifications let them have the benefit of the doubt and pay them for it, anyway. Make sure they know it.

    I think it can be done.

  22. GPS reference system on Global Warming Shifts the Earth's Poles · · Score: 3, Interesting

    I wonder how this affects high-accuracy geodetic GPS measurements. The GPS coordinate system is defined by the Earth's axis.

  23. Lyrics on Astronaut Chris Hadfield Performs Space Oddity On the ISS · · Score: 2

    Ground control to Major Tom! Your ammonia leaks, there's something wrong. Can you hear me Major Tom?

  24. Motion interpolation on NASA Lets Us Watch the Sun Spin For 3 Years In 4 Minute Video · · Score: 1

    It would be nice if someone could smooth the motion in this video with a plugin like Twixtor.

  25. Why light bulb form factor? on A Tale of Two Tests: Why Energy Star LED Light Bulbs Are a Rare Breed · · Score: 4, Interesting

    If you are investing in a light source that will not need replacement for a decade then why, exactly, do you care so much about it being shaped like a light bulb?

    LEDs don't like heat. Packing the equivalent of a 100W incandescent in a shape that pretty much minimized surface are to volume ratio is a very bad idea for heat dissipation.

    LED light panels make much more sense.