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User: Agripa

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  1. Lower capacity drives built with exactly the same hardware cost less because they can spend less time on the machine which formats the embedded servo information.

    And if the 1TB drive uses 2 platters, then the density for 314GB on 1 platter will be *lower* unless they only use one side.

  2. Coverage Problems? on LG Releases First Smartphone With DAB+ Chip (thestack.com) · · Score: 1

    ... it's hoped that the shift from the motoring to the smartphone space will alleviate some of the coverage problems that users experienced with the push to DAB-based car radios.

    How will using a handheld device with a tiny antenna solve coverage problems compared to a vehicle with a proper antenna?

  3. Re:Every thing as a perifiral on AMD's XConnect Brings Native Driver Support For Thunderbolt 3 Graphics Cards · · Score: 1

    Latency can be solved with local server farms.

    The only way latency can be solved on my AT&T U-Verse connection is if the server farm is in my basement.

  4. Bay Area Rapid Transit had no problem shutting down cell phone service to interfere with just a planned protest and nobody was sanctioned. The FCC tacitly approved of this.

    https://www.eff.org/deeplinks/...

  5. Re:Solved Problem?!?!?? on Thanks For the Memories: Touring the Awesome Random Access of Old (hackaday.com) · · Score: 1

    The cache array minus the tag and content elements is just an array of SRAM optimized for use as a cache with features like multiple ports. Before all cache became integrated, external SRAM was used for cache and it became increasingly specialized for cache applications as time went on.

    Many processors with cache (or all of them?) including Intel X86 processors boot into a mode where the SRAM in the cache can be used in place of external memory until the external memory can be configured for access. Many processors intended for real time operation can lock cache lines so that they can be used as fast local memory with low and predictable latency and high bandwidth.

  6. Re:Solved Problem?!?!?? on Thanks For the Memories: Touring the Awesome Random Access of Old (hackaday.com) · · Score: 1

    The one and only thing slower than memory access is disk access, and even there we are closing the gap. Memory has not gotten appreciably faster in a decade, unless of course you ask marketing people.

    DDR3's base rate is 800MT/s. DDR4's base rate is 2133MT/s ... yea, 2.5x is not appreciably faster or anything.

    The latency has not significantly improved. They are not putting massive amounts of cache on these processors to improve bandwidth but to reduce the penalty do to latency.

    Bandwidth can be increased using wider organization, higher clock speeds, and more channels; none of these things lower latency. Synchronous DRAM has been increasing bandwidth by reading more bits in parallel internally and then transferring them through a relatively narrow interface at increasingly high clock rates. In practice every DDR generation has doubled the clock rate, doubled the internal line size, and doubled the number of pulses in the burst transfer.

  7. Every single licensed commercial reactor in the US uses a negative void coefficient, so if you have a loss of coolant, the reaction shuts down. If you can't get coolant back onto the fuel, you might end up with some melt, but it will stay contained (Three Mile Island) rather than EXPLODING and showering radioactive debris over hundreds of miles.

    Weren't the Fukushima reactors by Westinghouse, and of American design?

    If that's so, how did they get significant melt that breached containment at the bottom of the reactors?

    These are two very different things. A negative void coefficient helps to prevent a prompt criticality accident like with what happened at Chernobyl. The melting of the reactor cores at Three Mile Island and Fukushima was caused by residual decay heat after the reactor was shut down but not cooled and this applies to any reactor.

  8. Re: "skeleton key" on FBI May Be Opening A Security Hole To Federal Agencies (computerworld.com) · · Score: 1

    What happens the next time the FBI (or any other LEA) has an iPhone that they need information off of? The FBI has divulged that there already exist about a dozen phones that need breaking. They have also admitted -- in public testimony -- that this case would set a precedent.

    So please tell me, specifically: how exactly is this just about a single phone, when the actual head of the actual FBI has admitted that it is categorically NOT about a single phone?

    Does anything in the court order prevent Apple from destroying the binaries and source after providing the contents of the iPhone to the FBI? If so when the next request comes in, the court can order them to produce the software again and Apple can start over with development. The way I understand it, the court order also requires the FBI to reimburse Apple for the effort so that could get expensive for law enforcement quickly.

  9. Re:"visually lossless" sounds a lot like lossy... on New DisplayPort 1.4 Standard Can Drive 8K Monitors Over A USB Type-C Cable (arstechnica.com) · · Score: 1

    The colour of an individual pixel still needs analog control, but with digital you can do exact pixel addressing. Contrast this to VGA where you're basically sweeping a spray can of a variable colour across the display. This is also why VGA monitors need adjustments to align this spray of colours with the display dimensions. No need for that with digital, where you always know which pixel you mean to light up.

    But even when driven from an analog input, an LCD still converts the signal to digital. So instead of digital to analog, using an analog connection makes it digital-analog-digital-analog.

    I was hoping someone would bring this up.

    Except for early models, LCD monitors operating from an analog VGA signal phase lock to the VGA signal so the pulse code modulated red, green, and blue signals can be synchronously demodulated. This effectively results in the ADC connected to the DAC but with the same sampling clock so there is no aliasing and the Nyquist criteria does not apply. The only losses are in the levels do to zero error, gain error, noise, and nonlinearity. In practice an analog VGA connection can be as good as a DVI connection under these conditions.

  10. Re:Steam Competition on Microsoft To Unify PC and Xbox One Platforms (theguardian.com) · · Score: 1

    Good thing Microsoft only released DX12 for Windows 10 to force everybody to upgrade. That way they can compete with Vulcan supporting everything with DX12 supporting only Windows 10. They don't need Windows 7, Windows 8, and Windows 8.1 users to compete.

    Or maybe that wasn't such a good idea.

  11. Re:This is what I've been saying since day one... on Judge Favors Apple In iPhone Unlocking Case In New York (google.com) · · Score: 1

    I know that. Under what authority does the judge issue this order? Namely, procedural-wise. Who has been charged? A writ is, if I understand correctly, basically a fancy name for motion for discovery which means that someone must have been charged at the point of issue.

    Once we get past that, we can debate the merits. We can then argue that it is overreach. We can then argue that it is an undue burden. But, more important (to me - and seemingly to this judge, if I'm understanding) is where hell do they get off thinking that they have this authority?

    The authority for the judge to issue the writ in this case comes from the All Writs Act passed in 1789.

  12. Unless you intentionally jump in front of someone and then slam on the brakes, how could it ever be your fault if you're rear ended?

    Changing a tire while stopped in the center lane of a freeway at night would count. This happened to a friend of mine.

  13. Re:Form Factor not "Format" on Google Proposes New Hard Drive Format For Data Centers (thestack.com) · · Score: 1

    Quantum tried that with their Bigfoot series of drives when the shift to the 3.5" format made the surplus infrastructure for 5.25" drives inexpensive and it still was not economical. If you did it now, you would have to recreate the infrastructure to build the parts for the 5.25" drives.

  14. Re:But... on Sorry, But Lasers Aren't Taking You To Mars Anytime Soon · · Score: 1

    Robert L. Forward suggested this 30 years ago:

    https://en.wikipedia.org/wiki/...

  15. Re:But... on Sorry, But Lasers Aren't Taking You To Mars Anytime Soon · · Score: 1

    You either dive into the star for maximum deceleration or you detach part of the sail and use it to reflect the beam back.

  16. Re:Bill Gates was always about controlling people on Bill Gates Sides With FBI In Apple Spat (ft.com) · · Score: 1

    Apple can't unlock the phone: only someone with the PIN can unlock it. Unfortunately, in this case, the PIN seems to be only four digits long, so you can brute force it. What Apple can do is tweak the software so that the auto-wipe does not kick in, and all ten thousand PINs can be gone through. This is brute forcing, and cannot be avoided, even with AES (though it'd take a while even with 128-bit keys).

    It is too bad Apple did not think to only allow updates on unlocked phones.

  17. The closest that it gets to defining which arms are protected (The Bill of Rights recognizes existing rights and protects them. Other parts of the Constitution define what powers are "allowed" to the government.) is in the prefatory clause which presumably would protect arms suitable for a well regulated militia.

    To me that means arms which a soldier would carry and it would certainly include anything which a law enforcement officer would carry. The 1939 United States v. Miller case supports that interpretation insofar as there was no adversarial process to present evidence of what arms were used by soldiers.

    In the absence of any evidence tending to show that possession or use of a "shotgun having a barrel of less than eighteen inches in length" at this time has some reasonable relationship to the preservation or efficiency of a well regulated militia, we cannot say that the Second Amendment guarantees the right to keep and bear such an instrument. Certainly it is not within judicial notice that this weapon is any part of the ordinary military equipment, or that its use could contribute to the common defense.

    The recent Heller decision would protect "those in common use for lawful purposes" while allowing "prohibiting the carrying of dangerous and unusual weapons".

    State courts have gone both ways as far as what is protected and US Supreme Court review is possible on what more precisely constitutes "arms".

  18. Re:IPv6 is such a disaster on IETF's Tips For Network Admins On How To Avoid Draining Smartphone Batteries (softpedia.com) · · Score: 1

    Upgrades? The modem at work has native ipv6 its not an added feature.

    Right about they time AT&T started blocking it, they also started advertising IPv6 availability if you payed to upgrade your modem.

    But just to note it is a business line $45/mo 12/1mbps It may have different features than a residential line. We also own the modem which is unheard of on a residential line.

    This is on a consumer AT&T U-Verse line.

    Hmm I haven't checked if I can still do tunnels over ipv4 I don't see why I wouldn't be able to.

    Did they give you a nat ipv4 address instead of a public ipv4?

    AT&T blocks incoming protocol 41.

    Several years ago everything worked like it should and you could use protocol 41 to tunnel IPv6 over IPv4 to either a custom tunnel endpoint or to the multicast endpoint. Then AT&T blocked it at their border routers so you could only use the multicast endpoint inside of AT&T's network. Then they blocked incoming protocol 41 at the modem so even that did not work.

    I filed a net neutrality complaint with the FCC with no positive results. My conclusion is that as far as the FCC is concerned, blocking by protocol is not a network neutrality violation.

  19. Re:Cam shafts work without the battery on Camless Internal Combustion and the Digital Age (hackaday.com) · · Score: 1

    But they won't start without one.

    unless you know how to push start a car with a manual transmission. You know "stickshift" ;)

    And unless it is a GMC where the theft protection system prevents push starting.

  20. Re:Cam shafts work without the battery on Camless Internal Combustion and the Digital Age (hackaday.com) · · Score: 1

    For that matter, the main reason that valves are designed the way they are designed is that they have to be operated mechanically using simple levers. With an electronically controlled valve, at least in principle, there's no reason the valve couldn't be built in such a way that it either:

            Opens outwards
            Opens by sliding
            Opens by iris action

    Any of those would eliminate the risk of the head colliding with the valves, and that last one could potentially also allow the ECU to individually adjust how much the valves open based on temperature, throttle, etc. much more precisely than any purely mechanical design, which might be beneficial in terms of fuel efficiency, noise, etc., or at least might allow them to eliminate external hardware that regulates airflow, thus reducing the overall cost of the engine.

    Circular poppet valves are easier to manufacture and have a significant advantage in wearing evenly do to rotation. Oval poppet valves are sometimes used to get more area but since they cannot spin, they do not wear evenly and have a shorter lifetime. More common is to use multiple circular poppet valves when more area is needed; the greatly increased valve lifetime makes up for the extra complexity of multiplying the number of parts.

    The only fail safe solution is to make sure the engine is a noninterference design where there is no possibility of a piston striking a valve.

  21. Re:IPv6 is such a disaster on IETF's Tips For Network Admins On How To Avoid Draining Smartphone Batteries (softpedia.com) · · Score: 1

    I am still waiting for AT&T U-Verse to stop blocking IPv6 tunneling over IPv4. They did not used to but when they started selling "upgrades" for IPv6 support, they also started blocking native tunneling.

  22. Re:prior art? on Microsoft Patents A Modular PC With Stackable Components (venturebeat.com) · · Score: 1

    and this patent describes stacking components.

    Like a Texas Instruments TI-99/4A?

  23. Re:Someone Else holds the patent on Microsoft Patents A Modular PC With Stackable Components (venturebeat.com) · · Score: 1

    The Atari 800 only used the modules for memory expansion. The Texas Instruments TI-99/4A daisy chained peripherals onto an expansion bus so it is a much closer match.

    https://en.wikipedia.org/wiki/...

  24. Re:Emergency Brake? on Jeep/Chrysler's New Gearshift Appears To Be Causing Accidents (roadandtrack.com) · · Score: 1

    One of the cool things is that you can start it with a dead battery by just pushing it or rolling down hill (It was small enough that I could push it myself).

    Unless it is the GMC. Their theft protection prevents push starting the vehicle even if you do not have the security key option.

  25. Re:Emergency Brake? on Jeep/Chrysler's New Gearshift Appears To Be Causing Accidents (roadandtrack.com) · · Score: 1

    Another reason to have a manual transmission is that in the event of battery or starter failure, you can push start the vehicle . . . unless it is a GMC.