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User: Chazmati

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Comments · 248

  1. slight correction on Introducing Asteroid 2004 MN4 · · Score: 1

    (above post should read "chances less than .004" as slashcode must have stripped my 'less than' sign)

  2. Re:My math tells me on Introducing Asteroid 2004 MN4 · · Score: 1

    Yeah, but it's the probability times the payout that makes this important, kind of like the lottery. People play the lottery with chances .004 because the payout is so huge.

  3. Re:13W could be dangerous... on Possible uses for Power over Ethernet · · Score: 1

    Is the UL definition for DC current? Or is that 500 ohms impedance, at the 60 Hz US standard line frequency? I wouldn't think 12V DC will hurt anyone (unless it's applied to your tongue, like testing 9V batteries; or if you drop a wrench across your car battery terminals, that might be bad...)

    I had an e-mag lecturer who asserted that 60 Hz was selected as a national standard in part because this frequency worked well for the electric chair. I find this hard to believe, more likely he was trying to be a scary professor. But he did have a table of current (mA) versus harmful effects on the body. The class assumed that the higher the current, the worse the effect. "Death" was listed in the mid-range, though, followed by serious burns or something. Someone asked what was up with this and he thought perhaps the skin charred at high currects and acted as an insulator, preventing further fatal transmission of current.

    Scary prof...

  4. Re:Vote with dollars on MPAA to Sue BitTorrent Tracker Servers · · Score: 1

    The advertisers have the consumer in quite a bind; if you protest the advertising by coming later you risk getting a crappy seat, or maybe no seat at all (sold out). I like getting a good seat, so I'm resigned to hating "the man" for subjecting me to the advertisments.

    'Course now that I have two young kids I rarely see a movie in the theater anyway...

  5. Napster on MPAA to Sue BitTorrent Tracker Servers · · Score: 1

    Napster (the original) didn't carry any files, either. It had the potential (probably never realized) for non-infringing use. But it was shut down.

    I thought maybe Napster could slide by on that argument alone. You know, like why don't they outlaw email or ftp, too? You can send an .mp3 file through e-mail. You can also send a picture of your kids to your parents. Apparently, if the usage is 99.9% illegal, the non-infringing use part isn't important. That's what's happening here. IANAL.

  6. Re:It should be noted on 230mph Electric Car · · Score: 1

    It's exactly like being in a lower gear all the time, with the torque advantage that a higher hear ratio delivers.

    Theoretically I can hit 104 mph in 3rd gear, and if I changed my differential from a 2.81 to a 3.15 I'd have a new top speed in 3rd gear of 93 mph (same redline limit for both cases). So yeah, I might have to shift one more time if I'm racing to 100 mph, because my top speed is reduced. But even so, how long does one more shift take? Half a second? Meanwhile, the torque to my wheels is increased by 12% throughout.

    That 12% should cut my 0-60 mph time from 6.4 to 5.7 seconds with NO extra shift, because I can hit 60 mph in second gear either way. The engine's peak hp capability didn't change, but now the car is quicker.

  7. Re:It should be noted on 230mph Electric Car · · Score: 1

    Sorry, I'm not saying you can exclude RPM, quite the opposite. I'm talking about instantaneous developed horsepower, which assumes a particular RPM. So you got me there. We're basically solving hp=(T * N)/5252 for engine torque, then converting that to torque at the wheels (through transmission and differential) to get at acceleration.

    But I think that saying "HP is the only thing that counts for acceleration" is misleading because it's actually the torque that provides the acceleration. For example, if you replace your rear differential with a higher ratio, you've just increased the torque at the wheels at every speed in every gear without changing your horsepower. You've given up top speed and fuel efficiency, but horsepower is the same, and the car is quicker.

  8. Re:It should be noted on 230mph Electric Car · · Score: 1

    That's not really the best explanation either. Not that I can do better. But the basic unit of acceleration is torque at the wheels, converted to linear force through the wheel radius. This linear force is what accelerates the vehicle, not the horsepower. Horsepower + gearing determines torque, which determines acceleration (along with drag, friction, gravity if you're going up/downhill, etc).

    The question is really "where do I maintain my engine RPM's for the quickest acceleration?" Shifting such that your engine RPM's are in the maximum TORQUE range usually puts you short of the peak horsepower range. If you were to downshift into a lower gear, the RPM's increase, horsepower increases, and torque decreases (you're past the maximum torque band) but that's okay because the torque multiplication due to the lower gearing more than makes up for the loss in engine torque. Maximizing horsepower maximizes torque at the wheels.

    Of course most electric motor/drives are rated full torque from zero to base speed, so the torque is constant but horsepower increases linearly as RPM increases.

  9. Re:It's gotta be about more than cash on Creative, Apple Battle for MP3 Player Market · · Score: 2, Interesting

    Word.

    I have a 384 MB flash-based player (Rio S35S with expansion card) and it wouldn't be so bad if it had USB2/FireWire/Ethernet, but it doesn't, and it takes "forever" to reload a new set of tunes.

    I'd love a hard-drive player; of course the high speed interconnect become more important. An iPod would be great if it worked with Linux, but I'm not talking about a Codeweavers "it almost works perfectly we think it's really almost useful" solution.

    I'm eyeing something more "open" like an iRiver H120. Supports Ogg, works in Linux. Optical in/out! Lithium rechargeable battery.

  10. Speaking of stocking stuffers... on Classic Toys For Christmas? · · Score: 1

    My grandparents threatened their kids with the story where if they didn't behave then Santa would leave them a 'bundle of switches' instead of toys in their stockings.

    My uncle (now an engineer) said he never understood the threat, always thought it would be really cool to get some switches in his stocking...

  11. Re:Advanced traffic lights? on China's Superior Technologies · · Score: 1

    Wow, that is strange. What were people doing at that light, stopping or going?

  12. Re:On the other hand on Security Responsibility Without the Authority? · · Score: 1

    How did he know who was trying to log into his account? Did these people try to log in from their own workstations?

  13. Re:All new technology? Unlikely on Samsung to use Sub-Pixel VGA Screens · · Score: 1

    Ooh, reminds me of the Amiga's fabulous HAM mode where you could--with some effort--display up to 4096 simultaneous colors on the screen! I think HAM stood for hold and modify... was it really only 4096 colors? Sigh...

  14. Re:Don't stop at just a power button on The Universal Off Button · · Score: 1

    Oh, so the loud pipes are a safety thing. Those Harley riders are just safety nuts, which is why you see so many with helmets on.

  15. My (original) drummer joke on Build Your Own Drum-Playing Robot · · Score: 2

    I hung out with a bunch of musicians in high school. Most of these guys were drummers, though, and I play a horn. We were always throwing barbs around, and the drummer jokes always riled these guys up.

    The best was this one time when we were all home from college. We found out that one of my drummer friends (and his wife) got duped into the Amway thing. We're at this guy's house when they decide to give us the presentation "for practice". Ugh.

    So Chris is in the middle of the presentation, and at this point he's pitching Amway as a great backup in case your regular career falls through. His unfortunate example of how this might happen was always a car crash. He turns to my friend Rob, who had decided to pursue percussion as a career. Rob was attending North Texas State, a top music school. Chris says "Rob, you're going to NTSU, you're going to be an awesome drummer someday, but what if you get in a car crash and... uh... lose your arms?"

    Rob grins and says, "Gee Chris, I guess I could sell Amway."

    Chris turns to me and says "Dave, you're going to RPI and you're going to be some genius engineer, but what if you get in a car crash and... uh... get brain damaged?"

    I look at Rob and say "Well, I guess I could still play the drums!" Rob attacks me and thankfully the scuffle lasted long enough to end the presentation.

  16. Re:At what point is DPI irrelevant on 2.2 inch LCD Display featuring VGA Resolution · · Score: 1

    Are you still talking about black and white d's (pixels) per inch? As the parent poster was saying there's a big difference between 300 dpi black and white and 300 dpi in 256 levels of grey.

  17. Re:monthly/per track pricing? on Emusic Relaunches - Cheap, DRM-Free Downloads · · Score: 1

    It also doesn't work so well when you want to download an album with many short tracks. You'll burn through your 40-track limit in no time. Maybe they should have a 200-minute/month plan (5 minutes/average track * 40 tracks/month).

  18. Re:What Relaunch? on Emusic Relaunches - Cheap, DRM-Free Downloads · · Score: 1

    Mod up. I was a subscriber during the $9.99 unlimited downloads period. That was awesome. They changed from 128k to 192kbps VBR, and I think they were using LAME for the encoding. That was awesome.

    But I think the "cap" hotpants is talking about was actually a limit on how many songs you could queue up for download. I think it was like 40 songs. But if you sat around and kept your download queue full, it was still unlimited. Pain in the *ss, though.

    Then they announced the end of the unlimited downloads. There was a mad rush as everyone tried to download as much as they could before the cutoff date, which basically amounted to a DoS on their servers. Funny, they probably served LESS music when people knew they could download as much as they wanted, when they wanted. IMHO.

    But a relaunch? What are they smoking? I don't see any changes. Maybe they added more albums/artists/labels, but they were usually doing this all the time anyway.

  19. Re:Can't get something for nothing... on The Voice Over IP Insurrection · · Score: 2, Informative

    Ok, I rescind my previous post. Skype rocks. It works on my wife's Powerbook, my compatibility-crutch Win2k box, and my Gentoo Linux box.

    Maybe they make enough on the $0.02/min SkypeOut service to keep them from using my bandwidth and CPU cycles for illicit purposes. :)

  20. Can't get something for nothing... on The Voice Over IP Insurrection · · Score: 1

    In order to receive the benefits provided by the Skype Software, you hereby grant permission for the Skype Software to utilize the processor and bandwidth of your computer for the limited purpose of facilitating the communication between other Skype Software users. You understand that the Skype Software will protect the privacy and integrity of your computer resources and communication and ensure the unobtrusive utilization of your computer resources to the greatest extent possible.

    Sigh, I thought it looked too good to be true. This is from the terms and conditions. It's a little vague--I suppose more details would be over the heads of most laymen. Maybe they're honest, though. Have you checked your CPU utilization while running it?

  21. Re:So, for 3 Grand... on 20,000 Zombie PCs -- $3000 · · Score: 4, Insightful

    She's probably an expert within her peer group. It's all relative, isn't it? :)

  22. Re:Great. on Audio Processing on Your Graphics Card? · · Score: 1

    Nice. I especially like the "All your base" shot.

  23. Re:Boring called. on IBM Recalls 553,000 Laptop Power Units · · Score: 2

    It would be pretty lame, but the NUMBER of defective units was interesting. Damn that's a lot of bad parts.

  24. Not photo-free, though. on POV-Ray 10th Anniversary Contest · · Score: 3, Informative
    Ive seen this image. It's great. I never saw accusations of the entire image being a photograph, the comments were more like
    "What city did you take this photograph in? (:"
    The author, however, describes the process here, and you soon realize that many photographs were as texture maps to make it.
    ...The bird is an image map with an alpha channel put on a box...

    ...The first building on the left is derived from pictures I took from a real one in New York. It is pure CSG (with some help of my windows macro), textured with an image map painted directly on an orthographic view of the model. The second building on the left is made of a CSG frame textured with 30 different small image maps of windows and wall panes (scanned from a photo)...

    ...The street lamps and traffic lights are a mix of CSG constructs and sPatch models. The shapes, sizes and proportions were (clumsily) derived from several detailed photos. The "Don't walk" image is a photo of the real thing. The signs are photos of real NYC signs, heavily retouched and sometimes
    rewritten...
    Not that any of this diminishes the artistic and technical ability of the author to 'put it all together' and produce an excellent image. If I could be so talented. :)
  25. Tourism on Hydra vs. Shredder · · Score: 4, Informative

    a "64,000 square meter International Chess City" in Dubai, planned to cost US $2.6 billion, which "will feature 32 buildings designed to mirror the image of a traditional black and white game board."

    Wow. Dubai is really ramping up the tourism hooks. I just saw an article in some boating magazine about the man-made islands they're building to increase their shoreline. I found a Google hit here.