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User: thogard

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  1. Re:The killer is the loss of advertising revenue on Free News Unsustainable, Says Warren Buffett · · Score: 1

    Its not so much double dipping as in the ads aren't worth much online and advertisers know that very quickly. The TV and print media have been very good at convincing their customers that ads worked and they worked well. Why do you think that being an advertising executives was shown in such a good light in 1960s tv shows?

  2. Re:Prior art on Using Pulsars For Spacecraft Navigation · · Score: 2

    5 km should be trivial. Less than 10 meters should be doable using consumer grade hardware.

    Pulsar emission areas have been mapped to about 2 meters according to some research out of Australia using radio telescopes. If they can map an emission source to 2 meters several light years away, then I'm thinking they should be able to get positions better than 10 meters when combining things. Another way to look at is that 2 m is about 6 ft which is about 6 nano-light-seconds. The trick is to adjust a clock tick to a known pulsar spin but a similar problem was solved with psedoranges with NavStar.

    Many modern GPS receivers already have special circuits or software to help remove the pulsar noise from the RF signals.

    The big problem with using pulsars is the scary sums that have to be calculated. Most modern GPS devices use a Kalman filter that take into account a high order polar polynomial that has factors such as sun's gravity change, as well as orbital wobbles involving Juniper and Saturn. For pulsars you have to have all of those combined with things that are near each pulsars and your local neighborhood. For our uses I think a 70 terms should about cover it.

  3. Re:I stopped flying. on Aviation Security Debate: Bruce Schneier V. Kip Hawley (Former TSA Boss) · · Score: 1

    How many deaths has it cause by helping spread such fun things like Methicillin-resistant Staphylococcus aureus (MRSA)?

  4. Re:3.5 million premises in ~3 years? on Australian National Broadband Network Releases 3-Year Plan · · Score: 1

    Foxtel has about 1.6 million customers (two cable boxes in a house count as 2) after 17 years of building their network. I don't think they did 1.5 million in a year. Be careful about "pass" rates and connections. Also don't forget to count the ones using satellite as well. There might not even be 1.5 million premisses hooked to HFC in Australia right now.

  5. Re:3.5 million premises in ~3 years? on Australian National Broadband Network Releases 3-Year Plan · · Score: 1

    How do you get that many people with the proper licensees to do the work? In Victoria they will 48 months of training. What your proposing is sort of like getting 9 people to make a baby in a month.

  6. Re:I've seen governments waste money in worse ways on Australian National Broadband Network Releases 3-Year Plan · · Score: 1

    Some of the complaints are technical in nature.
    Lots of stuff has been promised that simply can't happen with the current stuff that is being installed. For example the ONTs didn't have the ability to have different VPNs for data or voice traffic. The solution was to layer a VPN on a VPN and the last time I heard, it cost the same for a data+voice channel as just a data channel or a voice channel.

    Some of the equipment being installed had American telco inventory tags on it. If the original equipment owner can't offer gigabit (and are currently advertising 15 mb as fast), how will the rolled out system provide gigabit?

    It is also looking like nearly all the traffic in an area will go through 2 choke points. I don't think that having a system were two people with bolt cutters can take out most of an entire state is a good idea. If you calculate how many bits have be going through that system compared say a large peering point like AMS-IX, you will find the numbers are orders of magnitude larger which implies there will be some very interesting problems that have to be solved.

    Then there is the single shared fiber problem that NT&T has been working on for decades and have finally given up (they now use a name implying two stars for their solution which effectively uses two PON networks). It turns out that single fiber have the same problem that radio does when you want to talk fast, your transmitter blinds your own receiver for a short time and that introduces latency. You also have to coordinate all the transmissions. An ethernet packet on this network takes up about an inch and some of the links will be 70 km long so some how something has to magically get 32 optical devices to talk at just the right time without stepping on each other. To make that even more fun, they are hinging the fiber from poles so the optical length of the signal changes every time the wind blows.

    As far as attracting global users to the network, they look at the power bill first and walk away.

  7. What language can cope with minimal requirements? on Best Language For Experimental GUI Demo Projects? · · Score: 1

    If you're doing a new UI (like say the iPod touch one before it was around), you need a language that allows you to collect events that most languages don't. In fact most languages don't deal with the events at all, they just let the OS cope with some of it and massive libraries of poorly written software for the rest.

    What language allows you to hook into the condition where a mouse down event happened here and then there were motion events along this path... It gets even stranger when you start to deal with gestures or eye movements or whatever else you need to do to invent a new UI.

    The result of all that leaves C, assembly and forth with top layers in whatever you want.

  8. Re:You can't eliminate them on Obama Pushes For Cheaper Pennies · · Score: 1

    Adding the tax after helps keep it down. Compare the sales tax rate in the US where its added in clear view of the consumer vs in Europe where it isn't? In the US it ranges from about 0% to 13% with most in the 4 to 8% range. VAT in the EU is 15 to 27% When its hidden, its much easier to hide increases and it tends to be done in greater steps as well.

  9. Re:Big deal on Pasadena Police Encrypt, Deny Access To Police Radio · · Score: 3, Informative

    The keys for an Aussie Police system have been out for at least 2 years according to people who were at Ruxcon this year talking about this very topic.

    The radios sent lots of known plain text at the end of every call and its trivial to get the encrypted data. The rest is lucking into a key for newer systems or trying them all for some of the older systems.

  10. Re:This is news? on Google Starts Running Fiber In Kansas City · · Score: 1

    I have no idea what they are doing but I would like to know. I do know that the single fiber GPON that is being deployed here is just as future proof as the stuff I was putting the in ground in the mid 80s and splicing with xacto knives in the early 90s... as in its going to be ignored.

    I can't imagine that Google would try anything other that dual fibers to a switch and then run it from there. There are gigabit switches you can get that can hang from a cable.

  11. Re:Restrictions? on Google Starts Running Fiber In Kansas City · · Score: 1

    I want to put part of a RAID array on the other side of town.

  12. Re:This is news? on Google Starts Running Fiber In Kansas City · · Score: 1, Interesting

    "Once you have fiber to the house, you can offer what ever speed you decided to offer."
    Why do people keep repeating this lie? PON has been in use for about 2 decades and in that time has speed up 40x from the first production stuff to the fastest in a lab. Point to point fiber has increased 20,000x times in 4 decades based on the fastest gear I can buy over the counter in town today.

    Most FTTH is some sort of passive optical which is shared with somewhere up to 4096 other customers and one strand. This is not the yellow multi-mode fiber pairs that you can slap a 40 gigabit transceivers on and make it go faster.

    Since its a single fiber, when the ONT (i.e. fiber modem) turns on its laser to talk to the head end far away, it blinds its own receiver. It also blinds the receivers for most of the other nearby ONT as well and there is a delay before they can start seeing packets again. Some companies have tried to get the transmit on one color and receiver on another but that makes things very expensive. Some places have tried optical filters with other problems but most just use the cheapest lasers they can get and live with the self-blinding problem because they are building cable TV networks.

    There is also the packet coordinating problem. An ethernet packet on the 25 Gbit types PON systems is about an inch long and travels a bit faster than half the speed of light. To get 100% utilization out of your upload bandwidth, you have to coordinate the low cost optical modems to about a tenth of a nano second. The optical length of 10 km of fiber hung from poles changes by tends of meters as the wind blows it around.

    PON and its derivatives are broadcast networks that started out life as a way to reduce the cost of large cable TV networks. Its not a peering network and I'm not sure it will ever be.

    The network of the future will mirror the current telco networks with a pair of fibers to a central switching fabric.

  13. Re:Still a bit confused... on Google Starts Running Fiber In Kansas City · · Score: 1

    Most major fiber runs tend to follow highway, railroad or pipeline right-of-ways. KC is in the middle of all 3. As you mentioned, its along the Texas-Chicago route but also a cross roads for the east-west as well as links to the North West. St Louis is about as well connected but since it has fewer oil pipelines and less fiber along the rail lines and a mess of governments, I could see why it KC would be a much better choice for a pilot project.

  14. Back to basics on Ask Slashdot: Writing Hardened Web Applications? · · Score: 1

    1950's computer science used a model of "input/output/processing/storage" and it worked well for most projects but it also kept programmers minds on data flow. Find out how that data flow can be abused and prevent it. The simpler a system is, the few bugs it will tend to have.

    Also don't use systems that want to load up hundreds of packages to do something simple. Software complexity is the root of all security issues.

  15. Re:Why BASIC? What for? on Why Can't We Put a BASIC On the Phone? · · Score: 1

    Most programmers use the C { as just part of the loop. The first C compilers treated the { as a "create a stack frame" and } to close the frame.

  16. Re:This well-known but not a problem on GnuPG Short ID Collision Has Occurred. · · Score: 1

    Bit reduction in hashes is vital for many of their uses and that will result in collisions.

    There are lots of silly assumptions about crypto that just aren't true. For example thinking that there is a 1:1 mapping of keys. As far as I know, all public / private key crypto not 1:1 but is 1:N with where one private key can have more than one public key and it may be N:M. Since someone is going to argue the point... here is some RSA code

  17. Re:The Donations... on Anonymous Hacks US Think Tank Stratfor · · Score: 1

    I know of a charity that was used to test lots of card numbers and the bank happily took the money back and issued a charge back which was a real pain for the charity since they had already spent the money so now they can't help as many people.

  18. Re:Great idea! on NTSB Recommends Cell Phone Ban For Drivers · · Score: 1

    There are plenty of reports showing how the researchers pet project is saving lives.

  19. Re:well done apple on Apple Transfers Patents Through Shell Company To Sue All Phone Makers · · Score: 1

    The shelf company must have full control of the patent which implies full liability which means risking ownership of the patent.

    I don't agree with small companies being kicked out of the justice system because they can't cope with paying the suits in the legal reps from larger companies. The problem is how to you keep small trolls from using that to their advantage?

    Oh I hate /. .... without links to the upstream quotes. Can they undo the stupidity from a few years back? If you had quoted something i might be able to answer your question more directly but I'm just guessing on what you may be asking.

  20. Re:well done apple on Apple Transfers Patents Through Shell Company To Sue All Phone Makers · · Score: 1

    A patent troll company risks its portfolio if it sues, gets hit with a counter suit and then loses. In countries with a strict "loser pays" court system, a large company can get force a much smaller company to prove it has the resources to pay for its legal expenses and that technique is a well known way to deny justice between fell funded and tiny companies.

  21. Re:Only 70000 accounts? on Email Offline At the Home of Sendmail · · Score: 1

    Two decades ago we were supporting 78,000 users on a machine that was almost as fast as 4 Nintendo 64.

  22. Re:why not save attachments? on Ask Slashdot: Handling and Cleaning Up a Large Personal Email Archive? · · Score: 1

    Many attachments are in the mailspool lots of times. This is how google started allowing massive amounts of email storage, they only store a given attachment once (or so) even if its in a million email messages.

    It would be nice if there was a better way of going through the archives and moving the attachments off to one place to deduplicate things.

  23. Re:Scalability of Algorithms on Email Offline At the Home of Sendmail · · Score: 1

    The MAIL environment variable has been around since before the early 1980s and IDA sendmail had patches to look up the mailbox per user using dbm files in the late 1980s. I can't see this every being a problem with a mail server but I have seen it on usenet servers that don't expire some groups.

  24. Re:Ready, fire, aim on Anonymous Threatens Robin Hood Attacks Against Banks · · Score: 1

    Yes a donation is the same. If a cardholder's card number is stolen and used for a donation then the money is returned and the bank can fine the charity a chargeback fee. This is legal in every country I know of and I've been dealing with credit card payment systems for more than a decade.

  25. Re:Ready, fire, aim on Anonymous Threatens Robin Hood Attacks Against Banks · · Score: 4, Interesting

    The charities will be worse off since the banks will take the money back and then charge the charity a charge back fee. This action could bankrupt some charities.