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User: Wimmie

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  1. Re:How to do this on Can An 'OS For Electricity' Double the Efficiency of the Grid? (vox.com) · · Score: 1

    Well, I did.

    The line that makes the most sense in the article:

    "By now, many BS detectors will be ringing at full volume. I get it. This sounds like magic beans."

    I see lot's of random claims (saving lives, detecting hacked systems and whatever).
    What they do it high speed sampling of the current and voltage and compute 26 parameters
    (why 26, something I must have missed when I got a degree in electrical engineering).

    OK, you can characterize whats happening and try to correct some stuff.

    40 years ago we kept the grid clean by simply putting a synchonous motor and generator on a single shaft
    en could play around with thyristors, igbts and what not without generating a mess on the grid. The utility company
    was not so happy with the students experiments and this was required to prevent us from messing up the grid.

  2. COSMAC Super Elf on Ask Slashdot: What Was Your First Home Computer? · · Score: 1

    A single board which you had to solder yourself. , An 1802 processor, 256 bytes of RAM, four 7-segment displays and a HEX keypad. The instruction set was highly symmetric so I was my own assembler. It was quickly expanded with a second board containing 4K memory and a video output which I could hook up an old BW TV with vacuum tubes. On this TV is was easy to adjust for the line freqency which was different in Europe and a modern TB didn't sync.
    After a few years it was followed by an Acorn Atom (overclocked to 2 MHz).
    Almost all hardware which came after the 1802 has gone, (numerous PC's, LSI 11/23 etc) but I still have the 1802 board and its manuals lying around, it probably still works after 40 years.

  3. These monster machines can thwart your stairs defense the same way Daleks do.

    They don't climb the stairs.

    They just level the building.

    Marvin, the Paranoid Android, will talk them into oblivion.

  4. Re:This scares the hell out of me. on Stem Cells Change Man's DNA · · Score: 1

    As a result of this procedure your bloodtype (A,B,O) can also change. I had such a transplantation three years ago and kept my bloodtype (the donor had the same as me)

    As offspring is concerned, Don't worry about the DNA, the initial treatment will not
    be a BMT and my 20+ chemo treatments before took pretty well care of that.
    If I ever wanted any it would imply a trip to the freezer and an IVF procedure.

  5. Barcodes next ? on Virus Jumps to RFID · · Score: 1

    When can we expect the same story but using a barcode reader as inputdevice for the database ?

  6. Re:Skip to the ending . . . on Hitchhiker's Guide to the Galaxy Trailer · · Score: 2, Funny

    I must have an older edition...

    "Harmless"

  7. Re:A probably stupid question: What is ICT ? on Report Says Patents Threaten Software Innovation · · Score: 2, Informative

    How about "Information and Communication Technology"

  8. Re:LDPC codes on Turbo Codes Promise Better Wireless Transmission · · Score: 3, Interesting

    Lots of /.ers have been quick to point out that turbo codes have been around since 1993. However, the IEEE article points out that LDPC ( low density parity check) codes were invented in the early 1960s. Researchers have gotten the LDPC codes to outperform the turbo codes, and to top it off, the LDPC patents have all expired, meaning no royalty fees like turbo codes.

    The patent issue might by one of the reasons why it is probably not as widespread in use today. In Space communication various methods of FEC (Forward Error Correction) have been in use since the 60's.

    On OSCAR40 (a radio amateur satelite) it is one of the reasons why they proposed the combination of Viterbi (against random errors) and Reed-Solomon (against burst errors) codecs.

    A quote from KA9Q's website:

    Why not turbo codes?

    Some readers may ask: why not turbo codes? Why use FEC technology that has already been around for 25 years? The answer is simple: while turbo codes do outperform by 1-2 dB the classic concatenated codes proposed here, they were only discovered in the early 1990s and as such are surrounded by a minefield of patents that will not begin to expire for another decade. The Viterbi decoder was invented in the late 1960s, and the concatenated code used here has been around, almost in the present form, since before Voyager 1 and 2 were launched in 1977, so all patents on this technology have long since expired.

    http://www.ka9q.net/papers/ao40tlm.html