I think this article only applies to Digital Processing. If future engineers can more effectively harness Analog Computation, then the upper limits of computational power increase substantially.
Who says the future will be digital? We sure as hell ain't digital processors....
That's great - We've defined the upper limits of digital processing and storage, but what about analog??
Don't know about you, but a device that modulates multiple analog frequencies for upstream and downstream communications is called a MODEM [modulator/demodulator] in my neck of the woods! ADLS does this as does Cable. It's a modem that has a different frequency range, and tries not to step on either your existing voice range or cable TV range.
Hint -- That's why you only need one line for DSL and phone. Between you and the CO you can utilize far more frequencies on the UTP wire than the PSTN will allow thru the switches. Once your signal gets to the CO, the DSLAM creates a real digital stream [de-modulates the analog signals]
See these links for a good overview of ADSL technologies that Communications Systems Design published a couple issues ago:
Your nitpick is correct with ISDN, but incorrect with ADSL. ISDN is a truly digital signal, and the CPE devices are called Terminal Adapters. Perhaps HDSL and IDSL are different, but ADSL and Cable technologies are not true digital signals to/from CPE......so the devices are called modems. ISDN is pretty much dead, but I seldom hear folks call the CPE device for ISDN a modem.
They did not invent this idea -- This comes from Dr Eli Biham, and was presented at the "Fast Software Encryption 4" (FSE4), held in Haifa, Israel in January 1997. Here's a couple links for info on bitslicing and DES stuff.
Everybody is doing all optical cross-connects [switching]. Real news would be optical routing/switching based on actual optical content without electrical conversion of signal.
Oh...wait. That's optical logic -- provide enough optical logic for routing, and you will revolutionize computing -- IE, your company just invented and implemented large scale optical logic in a device smaller than a skyscraper....Goodbye Intel.
Anyone have info on optical logic research that might actually be able to compete with electical logic densities and keep the device size reasonable?
Re:That's why mathematicians != computer scientist
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Does P = NP?
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Just read the F'in paper -- Then comment intelligently math-boy. What a cop-out.
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I think this article only applies to Digital Processing. If future engineers can more effectively harness Analog Computation, then the upper limits of computational power increase substantially.
Who says the future will be digital? We sure as hell ain't digital processors....
That's great - We've defined the upper limits of digital processing and storage, but what about analog??
Don't know about you, but a device that modulates multiple analog frequencies for upstream and downstream communications is called a MODEM [modulator/demodulator] in my neck of the woods! ADLS does this as does Cable. It's a modem that has a different frequency range, and tries not to step on either your existing voice range or cable TV range.
Hint -- That's why you only need one line for DSL and phone. Between you and the CO you can utilize far more frequencies on the UTP wire than the PSTN will allow thru the switches. Once your signal gets to the CO, the DSLAM creates a real digital stream [de-modulates the analog signals]
See these links for a good overview of ADSL technologies that Communications Systems Design published a couple issues ago:
Part I - ADSL Physical Layer
Part II - ADSL Handshake/Upper Layers
Your nitpick is correct with ISDN, but incorrect with ADSL. ISDN is a truly digital signal, and the CPE devices are called Terminal Adapters. Perhaps HDSL and IDSL are different, but ADSL and Cable technologies are not true digital signals to/from CPE......so the devices are called modems. ISDN is pretty much dead, but I seldom hear folks call the CPE device for ISDN a modem.
I'm thinking it's siesmic. Actually should be classified as acoustic, but perhaps they gave it a special category? Any other ideas?
They did not invent this idea -- This comes from Dr Eli Biham, and was presented at the "Fast Software Encryption 4" (FSE4), held in Haifa, Israel in January 1997. Here's a couple links for info on bitslicing and DES stuff.
.ps.gz format
Birham's paper in
An explanation of the technique and source
Looks like the Swedish team used these older ideas.
The second link also indicates that Distributed.Net clients use this method for DES, but no info on RC5.
Everybody is doing all optical cross-connects [switching]. Real news would be optical routing/switching based on actual optical content without electrical conversion of signal. Oh...wait. That's optical logic -- provide enough optical logic for routing, and you will revolutionize computing -- IE, your company just invented and implemented large scale optical logic in a device smaller than a skyscraper....Goodbye Intel. Anyone have info on optical logic research that might actually be able to compete with electical logic densities and keep the device size reasonable?
Just read the F'in paper -- Then comment intelligently math-boy. What a cop-out.