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User: Trepidity

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  1. skeptical of home batteries for large-scale use on Germany Finances Major Push Into Home Battery Storage For Solar · · Score: 5, Interesting

    I agree with the general drive towards decoupling immediate production vs. use with better energy storage, but even with improved battery technology, everyone having batteries in their house is a particularly inefficient (and high-maintenance) way of doing it. Better approaches need quite large sinks for excess energy. For example, pumped-storage hydro is good for very large amounts. For medium-sized amounts, especially transient spikes, Denmark is experimenting with (PDF) dumping the excess production into district heating, since the heat reservoir handles fluctuations better than the grid does.

    Better prediction and integration between sources can also help. For example, Denmark is largely managing its fluctuating wind energy these days not by literally storing it, but by predicting much of the variation, and offsetting discretionary production within the integrated Nordic energy market. What mostly happens is that on high-wind days, Sweden and Norway just reduce production at their hydro plants, and use the excess Danish wind power instead. In a sense the excess wind therefore gets stored as potential energy in the hydro reservoirs, but just by not producing the hydro in the first place, rather than pump-storage.

  2. Re:Because plastic is for pansies on Solid Concepts Manufactures First 3D-Printed Metal Pistol · · Score: 2

    Many times the police have shot criminals 10+ times and still not incapacitated them.

    That's because the average cop is completely incompetent to carry a gun.

  3. Re:Because plastic is for pansies on Solid Concepts Manufactures First 3D-Printed Metal Pistol · · Score: 1

    High-capacity magazines? Maybe you should learn better marksmanship. ;-)

  4. Re:profile = evidence? on Researchers Use Computer-Generated 10-Year-Old Girl To Catch Online Predators · · Score: 1

    That will almost certainly be a defense if it comes up in court: that the defendants never really believed this was a real person, and knew all along they were offering money for harmless "virtual stripping" of a computer simulation. That becomes a factual dispute at trial, about whether it's plausible that they really recognized this as CGI, or if they are lying and really thought the girl was real.

    Kind of an interesting testcase for computer graphics realism: is this simulation good enough to be Legally Realistic?

  5. Re:profile = evidence? on Researchers Use Computer-Generated 10-Year-Old Girl To Catch Online Predators · · Score: 2

    This kind of "would have happened if it were real, therefore this person can legitimately be charged" counterfactual is also why the part about the other parties contacting "her" and initiating an offer is important. The investigators would like to be able to show that, absent the sting operation, the person would have initiated the same contact in a real situation (and maybe even did so in the past). But if the sting is too aggressive, initiates contact, etc., it can end up convincing people to do something they wouldn't have actually done without police intervention, which becomes entrapment. So for example with drugs, an undercover cop can stand on a street corner that's well-known for selling drugs and wait for people to come up and try to buy drugs from him (legitimate sting operation), but can't start going around to various social events and whispering "want some weed?" in people's ears, since that could result in selling drugs to people who, absent the police operation, would never have actually bought any (therefore, entrapment).

    Admittedly, cops sometimes tread pretty close to that line, and courts arguably let them cross it.

  6. Re:Funny benchmarks on Speed Test: Comparing Intel C++, GNU C++, and LLVM Clang Compilers · · Score: 3, Interesting

    This looks like it's testing the compile-time, in which case a large % of time being system time isn't that uncommon. Lots of opening and closing small files, generating temp files, general banging on the filesystem. Can heavily depend on your storage speed: compiling the Linux kernel on an SSD is much faster than on spinning rust.

  7. Re:Pay wall crap. on How an Astronaut Falling Into a Black Hole Would Die Part 2 · · Score: 5, Informative

    Fortunately, in physics, nearly everyone posts a manuscript version on arxiv.org (i.e. the same article but with the authors' own formatting, rather than the journal's layout). And indeed that is the case here.

  8. Re:Help us Google Fiber! You're our only hope. on Top US Lobbyist Wants Broadband Data Caps · · Score: 2

    Unfortunately voters are stupid, and therefore we have politicians who won't raise taxes even if it means lower costs for everyone in the long term.

    Lots of lobbying as well, without much money lobbying back on the other side. Locally owned municipal broadband tends to be a popular idea before ads start showing up on TV, but then the telcos pour a bunch of money into trying to convince people it's evil for any number of reasons.

  9. Re:Why not let them dig??? on Top US Lobbyist Wants Broadband Data Caps · · Score: 2

    But if it ends up with only one, due to it being too expensive for competitors to dig, aren't we back at a monopoly?

    The way the deregulated electricity markets with regulated last-mile infrastructure works, I can switch between a dozen different providers without having to get 12 different companies' power lines punched into my attic.

  10. Re:Help us Google Fiber! You're our only hope. on Top US Lobbyist Wants Broadband Data Caps · · Score: 4, Insightful

    How do you propose to end what's a natural monopoly: last-mile utilities to the premises? Let a half-dozen competing companies each dig up the street in front of your house every time they want to lay some cable?

    An alternative could be to have competition at the service level, but turn the last-mile infrastructure into a regulated utility with capped profit margins. That's what many jurisdictions do with power: the lines to your house are owned by a regulated utility, but they are required to sell transit, so to speak, to any comers, and the market to buy power is deregulated.

  11. why not just raise the gas tax instead? on Oregon Extends Push To Track, Tax Drivers Per Mile · · Score: 4, Insightful

    If the intent is that people should pay some amount per mile to cover the cost of road maintenance, just set the per-gallon gas tax equal to $desired_revenue_per_mile / average_mpg. This has the same overall effect as setting a direct per-mile tax, without the tracking nonsense.

    This will be "unfair" compared to a mileage-tracking system in that people with more fuel-efficient cars will pay less than their share, and people with less fuel-efficient cars will pay more. But that seems reasonable from the perspective of pricing negative externalities: maybe people who use more gas per mile should be taxed more per mile.

  12. Re:fucking idiot on Ask Slashdot: Legal Advice Or Loopholes Needed For Manned Space Program · · Score: 4, Informative

    Also, if you are an organization that gets a ton of press, you can probably get some pro bono legal advice through a more reliable channel than posting on Slashdot. Plenty of Danish lawyers would like to be able to put Copenhagen Suborbitals on their resume.

  13. Re:no thanks on Building an Opt-In Society · · Score: 1

    Even total Muslim immigration is quite low. It's less than 5% of the population here. Most immigrants come from such exotic places as... Lithuania or Romania.

  14. Re:opt-out? on Building an Opt-In Society · · Score: 3, Insightful

    If the opt-in frontier societies of the American West are a precedent, there is no opt out. Once you're in the company town, you're there for your term of service.

  15. no thanks on Building an Opt-In Society · · Score: 5, Interesting

    As a resident of a prosperous northern-European country with working infrastructure, a working healthcare system, relatively low poverty and homelessness levels, and generally a decent civil society that we all pay our share towards, I'll take the universal welfare state over some kind of ridiculous experiment in anarcho-capitalism. That's about as likely to work as any other anarchist experiment has worked. I guess America can have fun with it, though.

  16. Re:[citation needed] doesn't help on How PR Subverts Wikipedia · · Score: 2

    One way to minimise their PR efforts is to create significant Streisand effects on their work. But some PR companies are so desperate that they would probably even be delighted with that.

    Part of the reason there isn't much of a Streisand effect here usually is that in the common case, honestly nobody cares about these articles. A PR company writes an obvious fluff piece about some obscure internet portal or logistics company or for-profit university. If someone on Wikipedia catches it, they might try to tone it down or even delete it. But most of the time: 1) nobody even sees these articles; and 2) it's barely really worth the effort.

    If a PR company tries to fluff up a politician's article who's engaged in a high-profile race, or some energy-industry PR people edit an article relating to climate change, or the Turkish government hires a PR firm to edit the page on the Armenian genocide, then people will notice and care. But nobody reads the thousands of articles on obscure companies. The minus side is that they're usually crap articles, but the plus side is that they are relatively uninfluential crap: all they tell you is that some small company exists and thinks it's great, and they get a handful of views from Google. Usually they are not even really linked from other parts of Wikipedia: when the PR companies try to insert spammy links from other articles that people do read, that's when these fluff articles are caught.

  17. choice doesn't *require* bad defaults on Is Choice a Problem For Android? · · Score: 5, Insightful

    You can have a highly customizable UI without making the default bland and impossible to navigate. Having more customization does make some things more difficult, since you can't assume all users will have the same setup, but it's still compatible with a decent default interface.

  18. Re:Dial-a-ride on Finland's Algorithm-Driven Public Bus · · Score: 1

    One thing that may help Helsinki is that it's considerably more compact than Silicon Valley. The region covered by this system is about a 5 mi x 5 mi rectangle, which in Helsinki is actually considered a large area, covering most of the city, and about 750,000 people. Silicon Valley, by contrast, has distances frequently in the 20-30 mile range (say, Mountain View to SFO), and there is no 5x5 mi area that has a population as high as 750,000. It's just too sprawling.

  19. Re:Socialism run amok on Finland's Algorithm-Driven Public Bus · · Score: 1

    The Daily Show had a pretty good episode where they traveled to Sweden to film a warning about America's dark socialist future...

  20. Re:Speed? on German Scientists Achieve Record 100Gbps Via Wireless Data Link · · Score: 2

    Eh, it's a pretty colloquialism even in other parts of science to use "speed" to refer to a rate rather than only a velocity.

  21. Re:The bar meetings on What's Lost When a Meeting Goes Virtual · · Score: 1

    I could be imagining things, but I think there's actually a slight decrease in ability to carry on these kinds of discussions than there was a half-generation ago. You could assume that most computer scientists in the '80s and '90s had basic ability to use a listserv and carry on a conversation suited to the medium. I think that is less true now: many computer scientists in 2013 have absolutely no idea how to carry on a productive text-based discussion.

  22. Re:Not surprised on What's Lost When a Meeting Goes Virtual · · Score: 4, Insightful

    If you're trying to recreate a physical meeting, I agree. But it's quite possible to have productive virtual meetings if people adapt to working in a manner suited to the medium. I have a regular group of collaborators who I sometimes meet with in person, and sometimes meet with on IRC. The two kinds of meetings are both productive, real meetings, but with different strengths and weaknesses. However it works because we're all familiar with IRC and how to use it productively, rather than trying to shoehorn some other communication style into it.

  23. Re:Kids don't like vaccination?! on UK Court Orders Two Sisters Must Receive MMR Vaccine · · Score: 1

    Generally true, though the tricky part is that in disagreements between divorced parents, courts sometimes try to take the kids' wishes into account in ways that wouldn't have legal standing outside the divorce context. That's because the court is supposed to do many things in the "interest of the children", and when divorced parents disagree over what that is, they might try to discern from the children what that is (with varying degrees of success).

    Here the court seems to have taken the children's wishes into account, but ultimately decided that, when mom and dad disagreed over what was in the interests of the children, medical science was a better tie-breaker.

  24. Re:It's a long walk! on A Peek At Apple's Planned $5B HQ · · Score: 1

    I haven't worked anywhere that locks the stairs. Not only do I regularly take the stairs, but there are five stairwells (one in each corner and one in the middle), so I can take whichever one's closest.

  25. Re:It's a long walk! on A Peek At Apple's Planned $5B HQ · · Score: 1

    Man, you people must work in some weird-ass buildings. When I want to see someone above or below me, I just take the nearest stairs up. Sure, there is only one central elevator bank, but there are 5 flights of stairs (one in each corner of the building and one in the middle, near the elevators). Takes not even two minutes.