Slashdot Mirror


User: phliar

phliar's activity in the archive.

Stories
0
Comments
678
First seen
Last seen
Profile
(view on slashdot.org)

Comments · 678

  1. Re:outside of rental cars... on Rental Car + GPS = Speeding Ticket · · Score: 1
    if GPS becomes accurate enough, will the government begin to make auto manufacturers integrate these in to every vehicle
    If they did this, the GPS antenna on my car would prove to have been defective. A little aluminium foil does wonders.

    It would be a little more work to figure out how the unit communicates with les gendarmes to, er, discover that it was defective.

    Same thing about those lights on top of each car in Korea, that someone mentioned... I wonder why all those lights are still functional.

  2. Re:outside of rental cars... on Rental Car + GPS = Speeding Ticket · · Score: 1
    I've actually found that it's more accurate than the speedometer in my car at high speeds.

    Compared to what? How do you know which is more accurate? Just wondering?

    Out west (Nevada, rural California, Idaho, Utah etc.) they have stretches of freeway that are marked. (Usually where it says "Speed limit enforced by aircraft".) I have measured my speed using these markings; my car speedo was off by 5%. My GPS was dead on. (I'm such a geek.)

  3. Unemployment insurance is NOT taxpayer funded! on Former Dot-Com Workers Crowd Homeless Shelters · · Score: 1
    you can't KEEP the nice house/appartment you once had. You have to make sacrafices. You can't keep the BMW, the nice computers, and all the LUXERIES you had before. I'd rather be working my ass off and living in some shithole than ever recieve government aid
    "Government aid"? What are you talking about - AFDC, unemployment insurance, or homeless shelters (soup kitchens)?

    If you actually went on AFDC/welfare, you would not be paying for a "nice house/appartment" or any "LUXERIES" like BMWs.

    Unemployment is not taxpayer funded. When you have a full-time job, your employer puts money into the fund. In other words, my taxes paid for my unemployment cheque.

    Homeless shelters are charities.

    I'd rather be working my ass off and living in some shithole than ever recieve government aid
    Easy claim to make sitting in your nice comfy chair in front of the computer.
    I've got dozens [of fast-food places] within 5 miles of my place, and all advertise for starting at $7 an hour.
    If I worked 50 hrs. a week at $7, that adds up to $350 a week. How do I pay the rent, food, health insurance, transportation, utilities and taxes on that? If I work 50 hrs a week, how can I look for the tech job I'm somewhat qualified for? How do I feed my kids?

    Why do you feel such outrage towards people? It sounds to me like you have some serious personal problems to sort out. These ideas of yours are nothing more than warmed over reactionary ravings like those of Rush Limbaugh.

    Or you're in high-school, still living with your parents, and just read something by Ayn Rand.

  4. Re:High end audio on Insanely Audiophile · · Score: 1
    ... Alzo Spake Zarathustra
    Minor nit: "Also Sprach Zarathustra" or "Thus Spake Zarathustra" depending on whether you want it auf Deutsch or in English.

    Or, of course, "What Zarathustra Said".

  5. Re:High end audio - Bah! on Insanely Audiophile · · Score: 1
    Just spend a few minutes browsing through Stereophile. 100k for a pair of JM Labs Grand Utopia speakers, plus amps, transports, preamps et al.
    I have an uncle who's one of these crazies. Spends ridiculous amounts of money on speakers, amps etc. - but on actual music? Why would you want to listen to some stupid music when you can hear that frequency sweep CD and that stereo separation test CD! Oh well... he's an MD, I guess he needs to spend his money on some thing.

    I think that $1000 is the knee on the cost curve for speakers... maybe a few hundred each for the other components. Most houses are not quiet enough that spending more makes much difference. I have far more invested in CDs and vinyl. Spend the money on the music! Pay 140K for that string quartet to come perform for you every week!

  6. Re:Tampering with God's master Plan on Alex Chiu on Science, Religion, and Politics · · Score: 1
    There is actually quite a bit of evidence that the bible's account of jesus' life, death and resurrection is accurate
    There is actually quite a bit of evidence that I am actually Zeus, and that I have the power to fly without the aid of machines, and can impregnate virgins from great distances.

    Where is your evidence? Pah!

  7. Re:Tampering with God's master Plan on Alex Chiu on Science, Religion, and Politics · · Score: 1
    The Bible tells us that at one time, man lived to incredible ages - far surpassing the lifespan of Adam and Eve. Cain lived to be over 500 years before his death. God originally gave humans an infinate lifespan
    I was wondering what "infinate" was; now I know. Infinate means 500 years.

    Icarus developed a way to fly by encasing feathers in wax
    Silence, you fool! Or everyone will know that using wax to merely attach the feathers (as the legend has it) does not work, and that one must encase the feathers in wax!

    Shall we taint that last, final gift from God?
    I'd say "Fuck God!" but that might lead to there being more gods around.

  8. Re:I want to be a space cowboy too!! on Duct Tape · · Score: 1
    Uhhh, then why was radium used for luminous watch dials and such?
    Radium by itself was not used in watches; it was mixed with - some sulphide? - that would glow when excited by the alphas emitted by the radium.

  9. Not a reactor! on Duct Tape · · Score: 1
    It took many many years of work of the U.S.'s greatest scientists (and imported ones) to build a working reactor.
    Sure - a reactor is critical, is controllable, has safeguards, etc. etc. What this kid was tres cool even if it was very dangerous and stupid (but who are we to call youth stupid?). He built a neutron source (that's what frightens me, just about anything will go to a radioactive isotope and since they're not charged, neutron absorption cross-sections are huge compared to charged particles) and got lots of radioactive isotopes starting with uranium, thorium, and everything else in the potting shed. There was no shielding, no control over exactly what got irradiated. That's the difference between expensive labs run by all those "greatest U.S. and import scientists" in expensive labs and a kid in a potting shed.

    But how much nuclear physics do you need? All you need is this info: neutron bombardment will make thorium highly radioactive; there's quite a bit of Th in a lantern mantle; any alpha emitter mixed with beryllium makes a good neutron source; smoke detectors have a small amount of americium-241 which is an alpha emitter. Voila! Any kid who read Asimov's science books knows all this. Where the kid went a little astray is that a reactor - and a breeder even more so - is a huge engineering project, kind of like the difference between a Union Carbide plant and a high-school chem lab.

    I feel if only the kid had one good teacher in school, he would have had no trouble passing any tests and be well on the way to becoming a good scientist. We (society) fucked up.

  10. Re:I want to be a space cowboy too!! on Duct Tape · · Score: 1
    Now, for him to have kept refining materials WHICH WERE HARD TO GET into 110lb of ultra-pure uranium or plutorium would have taken forever!
    It's unclear if he actually got a breeder reactor working i.e. achieved criticality. A breeder reactor is critical, generates power, and creates fissile material from non-fissile material through neutron bombardment. Criticality means the reaction is self-sustaining and does not need an external neutron source. In any case, a "critical mass" is not an absolute; it depends on moderator efficiency, neutron reflector casings etc.

    What he did was build a neutron source - which is not too hard, any alpha emitter and beryllium will do - and irradiated thorium and uranium. That will certainly give you a huge amount of all kinds of alpha, beta and gamma radiation. Actually neutron bombardment will turn just about anything radioactive. (But radioactive things don't glow! A popular misconception probably based on the Cerenkov radiation in swimming pool type reactors which emit a beautiful blue light.)

    Thats why Foreign countries can't do it easily: because of lack of availability of materials.
    Which "foreign countries" did you have in mind? India (one country whose nuclear program I'm somewhat familiar with) has vast reserves of thorium and reasonable uranium deposits. BARC - Bhabha Atomic Research Center - has done a lot of work on thorium fast breeders, and I suspect India has large reserves of U-233. (Obviously the exact size of the U-233 stockpile is not generally known.)

  11. Re:Privacy. on Cyber-Policing In India: Bye-Bye, Anonymity · · Score: 1
    ... how long will it be before we *all* end up carrying such an id card?
    Is that the worst thing that can happen?

    O US Slashdot reader, Consider this: you probably have a drivers' licence and you probably drive everywhere. For the vast majority of US residents, for the vast majority of the time that you're out and about on public property, you're driving.

    To drive you must have, on you, your government issued ID. A cop can ask you for your ID at any time. (Sure, "probable cause" and all that crap, but have you heard of DWB - Driving While Black (or Brown)?)

    The most common form of public transportation for you, O USian Reader of Slashdot, is airline travel. You have to show them your state-issued ID to get on that plane. In an international airport, you can be asked to show an INS or Customs or DEA agent "your papers".

    So here's my thesis: In the US, we all have to carry a state-issued ID card that the police can ask us for at any time.

    Perhaps there's more to freedom than having to carry ID.

  12. Re:Spread Spectrum Technology on A Wireless Revolution From The Garage · · Score: 1
    My physics tells me that there is only one wide band spectrum in the atmosphere. There is no frequency band to tone into. ... The question is how to identify your buddy among thousands of wide band users.
    GPS does this - all the satellites use the same carrier frequency, and each signal is below the noise level. So how does the GPS unit receive the signal?

    You don't separate the signals from one another (and from the background noise) by being selective in the frequency domain (ordinary "tuning"); you do it with other means. Without going into a lot of theory, each satellite (or in this scheme, each transmitter) has a specific pseudo-random number (PRN) sequence (this can be generated by feeding a seed into a linear-congruence pseudo-random number generator). You use this sequence at 1 MHz to modulate the phase of the carrier (for civilian GPS, the L1 frequency of 1.57542 GHz) which spreads the signal over a bandwidth of 1 MHz. But before you do this, you modulate the PRN sequence with the message (at 50 Hz). To receive, the receiver knows the PRN sequence but it doesn't know what the propagation delay is; so it keeps shifting its private copy of the PRN sequence and looks for a statistical correlation between it and the received signal. When it finds it, it has "locked on". Now it can demodulate the satellite's PRN sequence to recover the 50 Hz navigation message. This is CDMA - Code Division Multiple Access. The conventional "tuning" approach is frequency division multiple access. You can also use phase, time, or other attributes to divide the signal into multiple channels. In the USA, Sprint PCS mobile phones are CDMA; AT&T mobile phones are TDMA.

    Here's partial correlation between the recieved and generated GPS PRN sequences. Here's a little animation of PRN "lock on".

    For this Fullerton method, the same sort of thing, except that instead of spreading a carrier into a 1 MHz bandwidth using a PRN sequence to modulate the phase, you use time division access over a much wider bandwidth - effectively 0 - 1THz or so which means the power at any frequency i.e. the chance of interfering with a user at that frequency - is very very low. But it could interfere with GPS.

    Clear? No? That's what I was afraid of! It's hard to understand all this without a little signal processing background.

  13. Re:Take a look at the name... on Coder on the Cross · · Score: 1
    arrogant jerks with big egos who can't work in a team, can't document their code, don't like anyone else even looking at their code - never mind working on it, and can't build any sort of large system, that think just like this.
    Of course I could be an arrogant jerk with a big ego (I'm pretty sure I am) - but if it does make any difference to you, I picked my next job because I thought it had the best team and the most cooperative atmosphere. I pride myself not just on the quality of the code, but on the design of the whole system as well as the documentation. As the team grew, I handed off large parts of my code to others. Thanks to my excellent documentation [arrogant jerk alert!] the handoff was smooth. I have done this at two separate companies.

    Unfortunately this is all off-topic.

  14. Re:Take a look at the name... on Coder on the Cross · · Score: 1
    His name is "phliar". There is a liar in him.
    Ah, you're paying attention! I use that name (and not just on slashdot) because I'm a writer, and it's an obscure reference to the platonic belief that art is a pale imitation of life, like a reflection of a horse in a mirror is not really a horse; hence art = lies.

  15. Re:Amen! on Coder on the Cross · · Score: 1
    [I'm the original poster.] The original reply had the right idea - how good I am (or think I am) has little bearing on the "killing oneself" syndrome. I put that in as a note to illustrate that I wasn't working longer than normal hours because I was overwhelmed; I was doing it because I was driven.

    I have yet to encounter a fast programmer who could write non-spaghetti code no matter how detailed the specs are. The original poster described himself as a hacker, which I interpret as someone who writes fast and messy; code that is absolutely unintelligible to a maintainer (or even him/herself after a few weeks or months).
    You haven't met me.

    I'm not fast and messy; I write detailed documentation - not just comments in the code, but design and architecture docs (which are vastly more helpful). Incidentally, this is one place that most free software fails. I am involved in a large free project. It has excellent documentation which is how I was able to make significant contributions even though I had to learn another language to do so.

    When I say hacker, I mean it in the original sense of the word - not one who commits hacks or kludges, but one who can come up with an insightful and non-obvious way of doing something in a way that is understandable. I place the highest premium on clarity and transparency. As Abelson and Sussman say in SICP, computer programs are for humans to read, and only incidentally for computers to execute.

    I'm also a writer; and I've found that every other good hacker I've met writes.

  16. Re:Enjoyable... read on on Hi-Tech Repo Man · · Score: 1
    You're a buddhist, aren't you!
    The greater people's desire to ... the greater the pain in their heart.
    That's it right there. The Fourth Noble Truth. It doesn't matter what the desire is for; undue attachment causes suffering.

  17. Re:Schadenfreude on Hi-Tech Repo Man · · Score: 1
    These people *knew* they were in a speculative bubble, and just chose not to recognize it.
    It takes a remarkable person to step back from hysteria and recognise it.

    Do you have any numbers on how many people actually lived all the stories about hype-crazed Gen X dot-com scumbag yuppies who rushed out and bought BMWs thinking the stock price would keep going up?

    Here's a clue: I live in San Francisco and was right in the middle of the whole thing; and I saw many companies go bust, and many friends, acquaintances [and well-wishers, in that they wish me no specific harm] get laid off. How many of them actually behaved that way? None.

    However I know many people who over the years have been with successful companies and have bought large expensive automobiles. (I am not one of them - I spend my money on airplanes.) The article said that AEACU [happens to be my bank] had 150 repos this year, up from 75 last year. How many auto loans do they write a year? 200? Or 20,000? That would certainly make a difference.

    In short, the article - and Slashdot's selection of it for the front page - is pure sensationalistic garbage. "I may be trying to get rich, and I live a richer life than I need to, but hey, at least I'm not one of those dot-com yuppie scum who are getting their BMWs repoed! Woo-hoo! Schadenfreude.

  18. Schadenfreude on Hi-Tech Repo Man · · Score: 1
    And this is News For Nerds, Stuff That Matters - how?

    People live beyond their means everywhere. Silicon Valley is no different from Lincoln NE.

  19. Re:Spread Spectrum Technology on A Wireless Revolution From The Garage · · Score: 1
    Isn't part of the point of this approach that frequency allocation would be unnecessary if everyone used this type of signal? And that the "dirtying" of "other people's" spectrum is not noticable?
    No.

    If we switched our entire usage of spectrum from bandwidth allocations to this kind of ultra wideband usage, it just shifts the regulatory burden. Instead of assigning frequencies (and therefore controlling the number of transmitters) you might assign power levels (and hence control teh number of transmitters).

    The dirtying of other people's spectrum is not noticeable if he's the only one doing it. If this becomes widespread [so to speak!] you bet narrowband users will notice it. The noise floor will be raised, so their channel capacity is lowered.

    GPS signals use codes (pseudo-random sequences) to spread their signal out. A type of aviation beacon - DME, or Distance Measuring Equipment - also does it. By controlling how you use the code to spread out your signal, you can confine your usage to one band of the spectrum, and hence not interfere with users outside the band. GPS uses this so all satellites occupy the same spectrum without interference. DME uses it so many airplanes can use one beacon without interfering with each other.

  20. Re:Great story of invention on A Wireless Revolution From The Garage · · Score: 1
    Ever since a professor at the University of Arkansas told him that such [ultra-wideband] pulses could not be used ...
    They're told it can't be done, and they obsess until they develop a solution.
    Or they were told so by an idiot, or they misremembered what they were told, or...

    What did the professor really say? "not practical [using today's technology]"? Or "physically impossible"?

    In a nutshell: TANSTAAFL. This is just spread spectrum using a very wide band. Yeah, he says imperceptible to other users of the spectrum - as long as he's the only one doing it! Get millions of users doing this and every user of spectrum will notice a higher noise floor. Higher noise floor == decreased channel capacity. Read Shannon.

  21. Amen! on Coder on the Cross · · Score: 3
    Without writing up a bio, I'll just say that I am a uniquely talented hacker; I have never met anyone better (and I've been around). In three days I finish what it would take a good hacker a month. A few years ago I decided to quit my cushy silicon valley job and join a startup. The paycut wasn't too bad, and there was the dream of hitting the tech stock IPO lottery...

    What happened instead was that very quickly I didn't care any more about the money or the options. I worked just about every waking hour. I did it because I really liked the work and the people I was working with. Others might call it obsession but that has such a negative connotation! I was having a blast. Sure, maybe I should have taken care of my health (chronic medical condition) but I don't have time to go wait in a doctor's office....

    Well, the management was as bad as the technical people were good. After 2.5 years of nearly killing myself, the company went under. Suddenly, it was all gone! My code! The system, the design! And it was really cool stuff, something that would have made a difference! And, oh yeah, no more health insurance.

    Now after three months of unemployment I've been able to come back to halfway normal. Health still bad but at least I eat and get enough sleep and spend time with friends. I'm finally ready to start thinking about going back to work. Well, actually I start in a week - at another startup. Now the question is: have I learned my lesson (whatever it is) or is this going to be the job that kills me?

  22. Natural Nuclear Reactors on Fission in a Box · · Score: 1
    there are natural nuclear reactors.
    Sure! You don't have to travel to Gabon or whatever; if it's not cloudy, just go outside and look up. See those little lights (or that one very bright light, if it's daytime)?
  23. The UDDI "community" on Why UDDI Will Work · · Score: 1
    The companies in their ``communities'' page have a few... issues. There are no links from this page to these members of the supposed community.
    I picked a company at random - Clarus - and went to their web site. First, their UDDI blurb says
    "As a leader in providing open and interoperable B2B solutions, Clarus embraces UDDI as a standard that validates our business model," reports Steve Hornyak, Executive Vice President and Chief Strategy Officer of Clarus Corp. "We look forward to continued participation in this initiative to ensure that business-to-business integration and commerce on the Internet becomes even more seamless."
    You'd think they were some sort of network infrastructure company or something, right? Wrong! They sell a pendant called the "Q-Link" that "protects from Electromagnetic Field (EMF) radiation", "enhances mental clarity" and increases energy and vitality". Because it has a "life-enhancing resonating cell", you see. All this for a mere $300! They also sell special "ClearWave" digital alarm clocks which incorporate "Sympathetic Resonance Technology (SRT)". SRT, of course, is what protects you from that nasty EMF.

    One question I have is: if the various products "protects from EMF", how can you take pictures of them using light? I haven't had such a good laugh in ages!

  24. Re:White trash solutions on Building Your Own Air Chiller · · Score: 1
    What kind of pinheads do we have here that this gets 4 points?
    ... white trash ... this thing was called a swamp cooler ... still used in the poorest parts of the south
    If the relative humidity is below 50% or so, a swamp cooler is much more effective than air conditioning. Go to Arizona or New Mexico - you'll see them everywhere. Go in the summer and you'll see how effective they are.
  25. Re:Libertarian babble? counter point my ass on FBI Turns To Private Sector for Data · · Score: 1
    >With a bad credit report, you can be denied employment, housing, and education.

    This line bothers me. How do you get a bad report. You can't get a bad report unless you don't pay your bills on time.

    Hyuk! Looks like libertarianism is another one of those things that's fine in theory, but every implementation of it will suck.

    You get a bad credit report because some idiot in some corporation filed some stupid report with a typo or in the wrong bucket. Sure, you can try adding your explanation to your file - but who will other corps believe, you or Mighty American Express?

    Corporations are not accountable for their actions. Government is -- nominally, at least.

    any corporation, organization, or business that keeps a detailed file on a citizen of the USA, that is outside the normal requirements
    And who defines these "normal requirements"?