Slashdot Mirror


User: vlm

vlm's activity in the archive.

Stories
0
Comments
8,750
First seen
Last seen
Profile
(view on slashdot.org)

Comments · 8,750

  1. Re:How can this be a general consumer product? on Set Free Your Inner Jedi (Or Pyro) · · Score: 1

    Take this guy to the electrical components aisle at Home Depot...
    His head will probably detonate when he sees all the exciting ways to electrocute your family and burn the house down.

  2. Re:1 watt isn't enough to set skin on fire on Set Free Your Inner Jedi (Or Pyro) · · Score: 1

    With that said, I might be trying to get one of these because you can do some pretty cool stuff if you mount a laser this powerful in a plotter.

    Yes, I already have a nice numerically controlled milling machine. I can rig up a light tight CNC cabinet without much effort. I already have the software for CNC engraving using an itty bitty endmill or a carbide burr. Bolt one of these lasers on the side of the milling machine headstock, plug it in place of the headstock motor control outlet, and I've got an instant laser engraver for about $200.

    Note that I already own the CNC mill, steppers, stepper drivers, power supply, and semi-dedicated PC. That would cost at least $1K to replicate. Still, starting from scratch a laser engraver now would seem possible around $1500, used to sell for ten times that a couple years ago.

  3. Re:I don't think any of this is the way to go on Bill Gates's New Version of the Einstein Letter · · Score: 1

    Something that would be nice, is a power-source that feeds off its own emissions in order to ELIMINATE (not reduce) pollution in the environment. Meaning a power source that takes the pollution we've already caused, and uses it to produce energy somehow.

    Well, yes, a class-two perpetual motion device would be nice, all you need to do is eliminate the second law of thermodynamics.

    http://en.wikipedia.org/wiki/Second_law_of_thermodynamics

    I suppose if we're rewriting all of physics, I wonder if it would be overall more productive, with more interesting applications, to violate/remove newton's law, which would open up some other interesting related applications.

    Other fun areas to rewrite would be Einsteins famous mass equivalence law.

    But it all seems rather pointless other than as a Star Trek plotline.

  4. Re:If it is long term viable, then invest in it... on Bill Gates's New Version of the Einstein Letter · · Score: 1

    Why does the government have to get involved if it is a good investment?

    The government's tax policy encourages short term over long term profit. That can be changed.

    The government's control of the capital markets via the federal reserve, controls interest rates, and indirectly inflation rates, which controls net present value of various investments. The bean counters dance to the govt's tune.

    Finally government regulation of environmental contamination, or lack thereof, obviously controls most business decisions. Merely tax coal mining at the actual cost of the devastation it causes, and you'll see changes. Ditto oil, etc.

    The question you should be asking, is why do you think there is a free market that the govt will begin to control, when in reality at a high level we have about as much of a command economy as the Soviets did, although with somewhat less control of the lower level individuals.

  5. Re:COFDM modulation vs 8VSB on DTV Transition - One Year Later · · Score: 1

    Look at the transition from black and white to color vs. NTSC to ATSC. Black and white owners didn't even notice the difference.

    You throw around acronyms but I don't think you understand the technological limitations.

    NTSC is basically a long story of adding more subcarriers using ever weirder modulation. Between the QAM color subcarrier, and MTS and SAP audio, there's just no space left...

    Amusingly transmitting the color subcarrier does use up some transmitter power, its not like it rides for free, so B+W users should have seen a modest drop in SNR at the B+W to color conversion.

  6. Re:ipv6 on DTV Transition - One Year Later · · Score: 1

    So, I say let's do it again with IPV6?

    Whats stopping you from dual homing? Uh, nothing? Hello tunnelbroker.net and sixxs.net and friends?

    Nothing in the RFCs prevents a hostname from having an A record and a AAAA record, like my vanity domain. So it does?

    Being able to successfully simultaneously use both does make a government mandated transition date a bit difficult, since its entirely unnecessary.

  7. Re:It sucks. on DTV Transition - One Year Later · · Score: 2, Interesting

    armanox is watching on a translator station, which still transmits analog?

    http://en.wikipedia.org/wiki/Broadcast_relay_station#Digital_transition

    It's a widely held, yet wrong, belief that all NTSC transmission had to stop. Some still remains, for like 1% of the population.

  8. Re:Fill 'er up! on DTV Transition - One Year Later · · Score: 1

    From the summary: "12% of respondents report that since the switch they have worse reception."

    How long does an outdoor antenna and coax/twinlead last? If, on average, a decade, then about 10% should experience worse reception each year. So, an excess of 2% have actual signal problems, or about 1 in 50.

  9. Re:Fill 'er up! on DTV Transition - One Year Later · · Score: 1

    I suspect that cable boxes and their remotes will eventually have something like the "rolling codes" system that garage doors and cars use.

    Ten or Eleven solenoids and a bunch of velcro later ...

  10. Re:Fill 'er up! on DTV Transition - One Year Later · · Score: 1

    Funny - people used to be all upset about planned obsolescence, but now that it's a reality you don't hear boo. Why is that, I wonder?

    Because they paid $2000 for their first small flatscreen, $1000 for their slightly bigger second flat screen, $500 for the even bigger third one... Once the screens get too big for the room, and/or prices get to the normal inflating era where you pay 5% more for the same thing, every year, they'll start screaming. Give it time.

  11. Re:What does a normal rack consume? on SeaMicro Unveils 512 Atom-Based Server · · Score: 1

    I don't know if 8 kW is a lot or a little less than a normal rack would draw.

    how much power would a "normal" rack consume?

    Well, just as a first guess, knowing nothing about computers, you could have estimated that you can wedge several floor mounted electrical baseboard heaters into the physical space of a rack, and the servers would (probably) be running 24x7 unlike the baseboard heaters. Keeping those baseboard heaters ventilated and air conditioned is going to be moderately challenging, but doable given a reasonable budget.

    So, knowing that its marketed as a "savings" so 8 kw is going to be less than average and that an order of magnitude or so more than a stack of baseboard heaters would be impossible to ventilate and air condition without exotic water cooling or something, you pretty much know that the power savings is large enough to interest a bean counter, but is not any exciting science or thermodynamic engineering breakthrough, so a typical rack could run as much as, lets say, 15 KW.

    Any you could check your work by stacking desktop "250 watt" computers into a rack shaped pile, and estimating the rack would be denser, maybe three times denser. So, maybe a tower/pile of 25 desktops would be about the right size, and would draw about six KW, then a rack would be about three times denser, maybe 18 KW, yeah 15KW is about right.

    You could also think about power cable management. Lets say we use a rack about 8 feet tall and power strips a bit shorter than a foot each, each strip fed by 15 amps at 110 volts. (The other side of the rack is for ethernet, etc). That sounds buildable. Actually you'd probably wire it a bit different if you could, I'm just saying this would work even if its not ideal. That would be 8 circuits at 15 amps at 110 volts or about 13 KW. Yeah 15 KW is about right.

    Yes you could do weird things with 440 three phase. But I'm just talking about "normal" stacks of off the shelf small business 1U Dell servers.

  12. Re:Absolutely possible, however on Teaching Fifth Graders Engineering · · Score: 1

    Not to mention, this caused a level of boredom and anguish at times which was a bit like getting stabbed in the eye and suffering literally a brain implosion

    A little juvenile delinquency made things almost bearable, for me anyway. I spent many an hour in class playing battleship on gridded math paper, and of course many an hour skipping out of school. I quietly read the newspaper and magazines in my high school calculus class. Since the district wanted to graduate kids on time whom failed a couple classes (to save money, I suppose) and I never failed a class, I took quite a few study halls.

    Will you separate out the brighest students, give them more attention and better tutoring, with the hopes that they do great things for your nation?

    Our local district cut all the funding for the "gifted and talented" program. Do have a nice new athletic field at the high school.

    There are a large number of people in the academic world arguing for either.

    No, for political reasons, at least here, its almost exclusively on "the social-democratic form" as you call it. Equality of outcomes not opportunities, social promotion, everyone gets a participation trophy, etc.

  13. Re:Not sure how this helps, but it's a good idea! on Teaching Fifth Graders Engineering · · Score: 2, Informative

    All tertiary sector jobs, and all of them go away, eventually, after the primary and secondary sector go away. So, since we've destroyed the primary and secondary sectors, tertiary should be going away shortly.

    Law is not so healthy, no way for recent grads to be hired or pay off their loans. A dying industry.

    Medicine will collapse once no one can afford it anymore. We are in in that process, right now.

    Exec management is a great solution for approx 0.001% of the population, the other 99.999% can starve, I guess.

    Investment banking probably mortally wounded over the last couple years. Only makes financial sense when the net population is pouring money into the stock market via retirement funds... and once the baby boomers retire and start a net pull out of the market, then a decades long bear market and a drought of IPOs is inevitable.

    Mismanagement/consulting, well, dead primary and secondary companies don't need managers or consultants, and soon dead tertiary companies won't either.

    Entertainment/sports, again a great solution for approx 0.001% of the population, the other 99.999% can starve.

    http://en.wikipedia.org/wiki/Tertiary_sector_of_the_economy

  14. Re:Which cliches do we want? on Teaching Fifth Graders Engineering · · Score: 2, Interesting

    My observations show enviro cliches are more popular now. The more guilt inducingly politically correct the better. If the hypothesis / test / conclusion steps are a bit weak, well, we'll give credit anyway because its so important. That's what I've been seeing.

    Besides, someone could get hurt/maimed/killed/sued from doing anything, so its better to just make a poster on the topic of enviro original sin.

  15. Re:Firecrackers on Teaching Fifth Graders Engineering · · Score: 1

    (such as an empty butane canister)

    Best way to empty them is to demonstrate PV=nRT.

  16. Re:Do it Mythbuster Style! on Teaching Fifth Graders Engineering · · Score: 3, Informative

    also encourages them to be critical of pre-conceived ideas.

    That is not going to fly in the bible belt.

    Locally they call it the "Science Technology Engineering Math curriculum", often referred to locally as "The jobs that have gone to India curriculum" or the "future downsized/unemployed of America curriculum".

    It seems like a cargo cult, perhaps if we just tried harder to indoctrinate our youth into textile work or manufacturing, then those jobs would have magically stayed onshore ... because, uh ... because we wished really hard.

  17. Re:And this is different to Walmart.... on Apple Censors Ulysses App In Time For Bloomsday · · Score: 1

    "Granted, I was sixteen" ... youth excuses many sins (just kidding) ...

    peopleofwalmart.com has 327 pages, each with 4 pix. At least 1308 people, assuming person per pix. On the visiting team, we have bytesex, and indulging pity we'll give credit for reading it twice. A ratio of 654 to 1 against. Declaring it "False" may be a bit ... premature. Nothing personal, but you're a rounding error. We all are, in one way or another, its not necessarily a negative description.

    Demonstrating a different kind of rounding error, walmart sells toilet paper to 100% of their customers. Or at least, I totally don't want to hear about walmart customers and/or slashdotters that don't wipe.

    Walmart specializes in selling the latter type of sales percentage, a bit more than the former.

  18. Re:I'd rather hear about a next gen console on Project Natal Renamed 'Kinect' · · Score: 2, Interesting

    Only crazy people are "having to constantly be upgrading"

    I take it you're not a grinder. I'm not either, but I do understand grinders. The same people that get a huge kick out of games designed around endless repetition, will be equally addicted to the game of "buy the top of the line graphics card the day its released". They don't have to do so for any reason, other than enjoying the grind itself. So trying to explain to them that they "DON'T REALLY HAVE TO GRIND VIDEO CARDS" is futile, because what they enjoy is the process of grinding itself.

    In comparison, I'm mostly a wargamer/strategy gamer. Obviously I can't play games like that on consoles because they don't sell games like that for consoles. But my pusher matrixgames.com keeps me well supplied with new games, and we'll assume for the sake of argument that consoles sold strategic wargames... Much as I appreciate a good 3 dimensional perfectly timed combined arms attack, I enjoy timing my game PC upgrade purchases so optimum motherboard price decline occurs simultaneously with optimal CPU pricing at the same time as a video card price drop. I'd miss all that upgrade scheduling fun if I had a console instead of a PC. Also as a wargamer, I care a hell of a lot more about screen size and resolution than I do about frame rate, but video card marketing price segments solely on frame rate, so even if I because a "video card grinder" my optimum card is probably not the optimum (and expensive) card for a frame rate grinder.

  19. Re:simple answer on Apple Censors Ulysses App In Time For Bloomsday · · Score: 1

    Giving your work product away and hoping that someone will pay you for it ensures that you will make less money than people who demand fair pay for their work.

    Sell one time to ten corps at $1K a pop, or sign yearly $500 support contracts to 40 corps, your choice...

    And as for "demand fair pay", much as the value of bits and Hz has dropped over time to about zero each, the value of a c compiler or text editor has rounded down to zero. Grousing about how text editors used to be worth $250 each and they still should today, is about as useful as grousing about how 4116 16 kilobit drams used to sell for about $25 each and they still should today.

  20. Re:And this is different to Walmart.... on Apple Censors Ulysses App In Time For Bloomsday · · Score: 2, Informative

    The difference is if I want to put objectionable stuff on a Kindle/Nook that I can't buy it through Amazon/B&N, I can get it elsewhere and read it without rooting the device.

    New to the ipod? Never heard of bookz? No need to "root the device"

    http://www.iphonebookz.com/

    or just search for "bookz"

    You can't, as far as I know, pay money for "objectionable stuff", but you most certainly don't need to "root the device" to put "objectionable stuff" on it.

  21. Re:And this is different to Walmart.... on Apple Censors Ulysses App In Time For Bloomsday · · Score: 1

    This is different to Walmart deciding not to carry content its store owners find objectionable, how?

    Ulysses is well written on a small scale, yet doesn't really have anything to say on the large scale, although it occasionally has interesting parts. Its used by the intellectual (and wannabe) class to "other" themselves away from the general population, and especially away from the neo-puritans, by being chock full of in-jokes / symbolism that only they understand.

    Using walmart as a straw dog is hilarious because Ulysses is not going to appeal to the typical resident of "peopleofwalmart.com". University bookstore might stock it, a "coffee bar/bookstore" type of place to show off your literary taste to meet MOTOS maybe, etc. It's stocked/owned as a symbol for intellectualism, but no one really voluntarily buys or reads it, because its just not that good. I'm not seeing it selling to the stereotypical walmart customer, so walmart stocking it would be a stupid business decision, which is not something walmart is known for. It's very much like complaining that the christian scientist bookstore won't stock Dawkins and Sam Harris, or the jewish bookstore won't stock Mein Kampf.

  22. Re:That always makes me suspicious on America Versus the UFO Hacker · · Score: 1

    As someone who suffers from anxiety, depression, and panic attacks

    Yes, his post might have pissed you off. Pisses me off a bit too. But, look on the bright side, you get the last laugh on him, because if that legal defense plan works, at least you'll always have a side job available as an independent computer based UFO researcher. Even in a flamewar, every mushroom cloud has a silver lining, I suppose.

  23. Re:Aliens! on America Versus the UFO Hacker · · Score: 2, Insightful

    It doesn't matter what medical conditions he has, it doesn't matter WHY he was doing it, he hacked government servers.

    For at least some crimes, motive and state of mind is very important for prosecution. Research the difference between 1st and 2nd degree murder, etc. Not saying that matters in this scenario, but generally it has considerable legal importance.

    Since at least some of his medical conditions could be considered mental illnesses, that will probably be his defense. Someone whom has anxiety attacks and believes the only way to defend himself is to break into the pentagon computers, will probably end up, after staggering government legal expenses, in the nut house until he's cured by medication and given supervised release.

    Regardless of how it turns out, I'm not seeing any result that could be useful for the US govt, or would have a sensible cost/benefit analysis result.

    1) From a PR perspective, I suppose jailing other countries crazy people is better than us bombing them, marginally, but not much. If the US forced his govt to put him into a mental health institution near his home, maybe that would have been better PR.

    2) From a network security perspective its a negative because we're setting a precedent of trading sloppy procedures for legal attacks.

    3) From a conspiracy theory perspective, this is absolute proof the USGovt has proof of aliens and UFOs. I suppose that distracts them from the real conspiracies, but its not much of a win.

    4) It makes his govt look like a US lapdog, not that theres anyone left in the world that didn't know that already, but it still looks bad.

  24. Re:Aliens! on America Versus the UFO Hacker · · Score: 1

    I thought it was the gray's who got that bill passed?

    Gray... hairs?

  25. Re:Aliens! on America Versus the UFO Hacker · · Score: 1

    I'm not sure Arizona thought this through - the little buggers are expensive to deport.

    Sitting around, waiting 30 years, then visiting AZ would have saved ET a heck of a lot of fooling around with "speak -n- spells" and all that junk.