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User: Ahuitzotl

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Comments · 14

  1. Re:Desperate Twinkies on Hans Reiser and the "Geek Defense" Strategy · · Score: 1

    His story also fails Occam's razor, big-time. The simplest explanation that fits all the facts is that he did kill her. His explanation doesn't fit all the facts, and it rings false. More and more, it sounds like someone with too big an ego, who is in the process of losing everything, and finally throws caution and civility to the winds.

    Actually, wouldn't the simplest explanation be that the boyfriend did it? He is an admitted 8 time killer, Hans is not...

  2. Re:Artificial bases would have what effect? on Artificial Bases Added to DNA · · Score: 1

    So your basically saying (from a geek-laymen point of view) that they added new instructions to the ISA, but there may not be a CPU that can execute them yet?

  3. Re:Yikes! on Has the Higgs Boson Particle Field Been Hiding in Plain Sight? · · Score: 1

    Great Lexx reference! Its about damn time someone remembered *that* cult classic!!!

  4. But whats the *REAL* capacity? on Ultracapacitors Soon to Replace Many Batteries? · · Score: 1

    Is the life time given in terms of the full capacity of the capacitor or a range that would be equivalent to the output of a battery?

    A typical LiIon battery has a working voltage range of 4.2v fully charged to around 2.6v fully discharged. Any lower then that and the battery is pretty much destroyed, or the working life significantly shortened. With capacitors the working voltage range would be from their rated working voltage all the way down to 0V. Most electronics cannot work over a range that wide even with special buck/boost or SEPIC switching regulators which can take input voltages that range from above the output voltage down to a voltage below the output.

    So basically, how are they rating these? If they are rated in terms of their full output range then I am afraid that the actual *useful* capacity will be much much smaller then what the article states.

    This is something I have always wondered since these things came on the market, and I played with my first 50F Aerogel supercap and nearly melted the lead of an led off when I accidentally shorted it out...

  5. Re:Do they burst and leak fluid? on Ultracapacitors Soon to Replace Many Batteries? · · Score: 1

    Some of them use Aerogel. Its neat stuff. I think the newest ones use Carbon Aerogel.

  6. Re:SI units on Seagate Offers Refunds on 6.2 Million Hard Drives · · Score: 1

    The fact that it is a bit string fully implies that its stored using powers of 2! What are you talking about? Each bit has 2 states, on and off, that is a very direct and obvious proof that computers work in powers of 2! Even floating point is powers of 2 based! And I was not talking about size re whats stored on it, I was talking about size with respect to how its represented! And you obviously don't know much about NAND flash if you think the 'computer' never directly accesses it. Of course it does! The 'computer' in this case is the CPU that actually accesses the flash and does the wear leveling on it! Or in the embedded systems sense, it very much is the CPU running linux that has direct access to the NAND flash chips. Why do you think the NFTL driver exists? The fact that the length of a chip is a power of 2 long is DIRECTLY RELATED TO HOW ITS ADDRESSED. Why would you have a chip with 1000 bytes if you have 9 address lines? That would waste 24 bytes of address space.

    And as for NOR flash flash capacity being zero... I think 32MB exists quite well to me, being an embedded developer that programs CPU's with 8-512 KB of flash.

  7. Re:SI units on Seagate Offers Refunds on 6.2 Million Hard Drives · · Score: 1

    I hate to break it to you, but flash is not rated in powers of 10. Go read a datasheet will ya? The reason the number is odd for NAND FLASH (the kind used in USB keys flash cards blah blah blah...) is because of all the spare sectors in the device. Also, NAND FLASH is almost always spec'd in BITS not BYTES (For example a 1Gb flash chip is 128MB + some extra for ecc and such). NOR FLASH on the other hand is always spec'd in even powers of 2, and is always listed by the bit and byte capacity (at least in the datasheet).

    Spec'ing FLASH (and anything else directly addressed by a CPU for that matter) in base 10 makes no sense. The hardware simply does not work that way, and its incredibly inefficient to do it. Representing the number 10 in base 10 in a computer would require 8 bits, it only requires 4 if you do it in base 2. Assuming we would be using BCD to do this base 10 representation would mean we have to use 4 bits for every digit in the number. Thats a very huge waste! I suppose someone could build an analog computer with 9v (or equivalently scaled) logic and do it, but why?

    I believe the E1, E2, E3 stuff is represented in powers of 2 because each sub channel is 32kbps. Here in the states where we have the T1 etc, each sub channel is 24kbps, so we do not use base 2 math. That seems to be the case for all of the European vs US telco stuff. The Brits got smart and used easily computer divisible clock rates where us here in the US are stuck with this crazy junk. Which brings me to another point... Using power of 2 based data rates is smart because its really a pita to divide a clock by anything but a power of 2 and get a 50/50 duty cycle clock out of the divider. This is one reason why PLL based clock multipliers/dividers were invented...

    Oh yeah, and someone else mentioned the 4800 baud modem... That was back when Baud and Bits were NOT synonymous.. Technically to anyone that knows anything about modems (I can't say I know much...) they still aren't the same today, only marketers make them the same. Baud has to do with the modulation technique, which means the bit rate can be higher or lower then the baud rate. So applying powers of 2 to baud rate would not make much sense...

  8. Re:Probably a requirement on Valve Locking Out Gamers Who Buy Orange Box Internationally · · Score: 1

    You seem to be neglecting the fact that if the game sold for $10 here the market would probably open wide up. I'm not much of a gamer (GASP!) so I do not buy many games, but if I could get a game for $10 thats in my throw away income range, and I would be willing to buy it to see what its like, even if I don't end up playing it in a few months. Thats a sale they would have never made otherwise. I bet I am not the only person that thinks that way! The market usually responds favorably to lower prices (the fact that people are going over seas to buy the game proves that) so maybe, just maybe they would sell more games if they lowered the price here... Ya Think?

  9. Hmm, would be good for a Tesla Coil at least! on James Randi Posts $1M Award On Speaker Cables · · Score: 1

    If the cables in that advert are actually constructed as litz wire then they would be perfect for a tesla coil which needs to drive huge currents at high frequency (100s of KHz to over 1MHz if its an SSTC), where the skin effect would really happen. This is why they usually use copper pipe as the primary, because the current would be conducted along the outer layers of the conductor anyway. Of course there is no way I would pay that much for litz wire, but if it was maybe 10 or 20 dollars a foot then it might be worth it, who knows!

  10. Re:It only gets worse. on Excel 2007 Multiplication Bug · · Score: 1

    Try it again in base 13...

  11. Re:Talk about dumb on MIT Student Arrested For Wearing 'Tech Art' Shirt At Airport · · Score: 1

    So maybe we should ban wires and putty from airports then ehh? Just because the TSA is a bunch of morons and you want to *feel* safer. What should they do if someone were to bring a 5 yo child in to the airport with a gameboy and a hand full of modeling clay? Should they shoot/arrest the 5yo too? I mean that modeling clay could be C4! That gameboy could be a detonator! OMGZORS!!! 5 year old children are trying to kill us all!!!

    Ignorance is no excuse, and should never be. The people that are defending what the cops did are just as ignorant as they are. How far do we have to slide into the pits of fear before you realize that all these TSA people are doing is placating your comfy button? Maybe you will figure it out when a real bomb goes off in a mall because all the *security* was at airports. Oh wait, no you will just call for more *security* and stupidity... I forgot people that are afraid don't think rationally.

  12. Re:single isotope on Perfect Silicon Sphere to Redefine the Kilogram · · Score: 1

    I was wondering about exactly that while reading this (the abstractness of measuring things) as I was thinking, they define a meter as the distance travelled by light in absolute vacuum in 1/299,792,458 of a second, well, how do we know how long a second is? Well thats defined as a certian number of times a cesium atom 'wobbles' between 2 different defined states which are defined by yet another measurement. How do we know that we have these measurements right? Don't the errors compound after awhile, since we are basing measurements on yet other measurements, that we may have got wrong? Are there any measurements that we can state with absolute certinty that we can base all our measurements on? Or are all measurements doomed to be based on prior measurements that we may or may not have done correctly? Does it all even matter in the scheme of things?

  13. Re:I have a suggestion on Fedora Project to Help Revitalize RPM · · Score: 1

    Actually I think that would be bad. It would provide less flexibility for distro maintainers. I maintain an in house FC4 based embedded distro and I already have to strip out all the docs and lang files to get to my 150MB target size. You would not *believe* just how many gigs of space docs take up! On my 'install everything' FC4 system the /usr/share/doc dir is 1.2GB. /usr/share/man is 165MB. /usr/share/locale is 686MB. Thats over 2GB on what I think was a 5GB install. Thats 40%! Even if the install was as much as 8GB, all that cruft still takes up 25% of the install space. I really wish everything was split into seperate packages. A docs/man package for the people that need man pages, a lang package for the ones that actually have users using the programs installed directly (on embedded systems this is usually not the case and they would never see a message that needs to be localised at that level), a devel package for developers, and the application package itself. Think of all the space you could save on a system like a server or embedded system where you don't need the overhead of all that junk. Of course all of the above is not specific to the RPM format but how the spec files are built, so it can pretty much be done now. I have thought about building and releasing my own RPM based embedded distro, but its a hell of alot of work, and I don't have the time or money to do that for free.

  14. Re:Capacitors on Michigan Teen Creates Fusion Device · · Score: 1

    Actualy the picture tube (especially in very large TV's) IS a capacitor. Quite a painful one too. I once was messing around with an old 26" monitor (the kind used at airports) and had dischargd and left disconnected the tube. Well I forgot to keep the HV anode grounded while it was sitting there and I came back several days later to a nasty suprise. Apparently picture tubes can re form the charge over time. I forget what the name for this is, but I have seen it in repair manuals and such, it seems to have to do with the fact that they are so large and have such a large surface area.