The wall end of the cord differs by country, but the equipment end is the same IEC-309 power coupling the world over. With the rising popularity of wide voltage range (100-250Vac, 47-63Hz) power supplies all you need is the local market's cord set. It's not that big a deal any more; just buy the cord locally and you're all set.
Yes, but is that memory a positive or negative influence? Without naming names, there are prominent car dealers (new and used), furniture stores, and electronics outlets who buy lots of commercial ad time on the local TV stations. They use this time to air the same annoying, uininformative ads over and over again. Do I remember their company name? Of course I do.
Will I ever do business with them? I remember their ads. They make these merchants appear to be stupid, greedy, unethical bandits. If they were the last dealer in town, I'd drive to another town just to avoid them.
Extending DST back into March, and especially prolonging it through November, is futile. On the winter side of the equinox dates, there isn't surplus daylight going to waste. You get up before dawn and start turning on lights as you get your kids out of bed and get yourself ready for work. You turn up the heat, because those pre-dawn hours are the coldest time of day (or the "set-back" thermostat does it for you). It's still dark when you leave for work, and it's already dark when you get home. If anything, DST should end a month earlier than it does now: no later than the end of September. At that time of year, setting the alarm clock for 6am means you wake up at dawn (think "equinox"). Enforcing DST during winter winter days means more people will be be and about before daybreak. That's counter-productive for energy savings!
(b) An inspection certificate under this section must contain a tamper-resistant transponder, and at a minimum, be capable of storing:...
(c) In addition, the transponder must be compatible with:
(2) interoperability standards established by the Texas Department of Transportation and other ntities for use of the system of toll roads and toll acilities in this state.
Don't confuse these with the passive RFID tag in your company's access-card badges. They're requiring active transponders, the ones that give your ID number to the toll road computer or the truck weight stations as you zip past at highway speeds.
One thing you left out is that automotive internal combustion engines typically have an efficiency of somewhere around 20%. I hope that the charger + batteries + electric motor have a better effeciency that than.
Charger: 95% efficiency
Battery charge efficiency (AHr out/AHr in): 90%
Battery voltage efficiency (Vdischarge/Vcharge): 90%
Inverter efficiency: 95%
Motor efficiency: 90%
Net plug-to-shaft efficiency: 66%. I used optimistic (but achievable) figures for this estimate, typical of switch-mode charger and inverter technology and not trying to charge the batteries too quickly. Going for a faster charge brings the efficiency down.
A further issue is the expense of battery replacement. No storage battery will last forever, and the cost of replacing them usually exceeds the value of all the electricity run through them before they wear out.
There remains a huge gap between what could be done and what is being done. The power for these cars is an additional load to our overtaxed power system; it will come from the new plants coming on line rather than the average of the existing plant base. There is no significant new hydro power or nuclear power coming on line in the USA. Solar, wind, and geothermal sources provide a fraction of the new power coming on line. Until the economic and regulatory climate makes cleaner power sources attractive to the utilities, the KWHrs these cars consume will come from burning fossil fuels: natural gas, coal and oil. Even if the economic and political considerations changed overnight the power mix will not immediately follow. Years of lead-time is required for power plant siting, design, and construction.
When you get to age when the eye doctor starts hinting about bifocals, have a set of glasses made specifically for CRT-distance. Not just lineless bifocals, but the reading Rx throughout a full-sized set of lenses. You'll be surprised how much easier it is on the eyes and the neck (no more contortions to see the screen in the lens' "reading zone"). And if your job requires safety glasses, your company may even pay for them!
The RFID tag may not be re-writable. The simplest way is to use a one-time-programmable memory in the RFID. The data could also be encrypted with a private key, so that new valid data would require knowledge of that key (which should change regularly based on passport issue date, so that one compromised key compromises only 0.04% of the currently valid passports--based on 250 business days per year and 10 year expiration).
I see the bigger problem not being data theft, but the ability to scan people to see who's carrying a passort. Passport = tourist, a target for criminals. Tinfoil wallets, anyone?
The article talks about responses appropriate for a disk drive crash. That's all well and good, they do happen at times.
But most system "crashes" really are software bugs, making the system unresponsive to all attempts to regain control. Even control-alt-middle finger won't get the system to respond. Nothing to do except hit the reset button (or pull the plug, if your system is "modern" enough to lack a reset switch) and curse loudly while it reboots. The user doesn't care why, all they know is the damn thing just wasted a lot of their work again, while the boss is breathing down their neck about making a deadline...
If your view of "dynamic range" is limited "low noise figure" then yes, a GASFET beats a vacuum tube. But the at the other end of the dynamic range (IP3, etc.) vacuum tubes' RF high power capabilities have the advantage.
To use an extreme counter example, the venerable Eimac 4-1000A tetrode (cathode driven) can deliver 1.5KW output (+62dBm) with -30dB IMD3 products and 12dB gain at 14MHz. That puts the output IP3 at +77dBm, and input IP3 at +65dBm. Try to beat that with a single transistor!
You need to use the part that's appropriate for the application. You'd never use a 4-1000A for an LNA, but you don't build a large power amplifier with GASFETs, either.
I wouldn't put it quite that way. I say that the reason humans can fly in airplanes is because we quit trying to do it with feather-covered ornithopters. If you fixate on the goal of a flying machine with flapping wings, you wouldn't come up with the airplane. In other words, you extend and apply the proven science, rather than hoping some miraculous new science appears to validate the conclusion you insist upon.
Assuming the article wasn'r a work of satire, which it certainly could be!
The steps are out of sequence. First you need the newly discovered anomaly, then you investigate it to see what it means and where it leads. You don't decide on a destination, then throw around truckloads of money hoping to discover a new physical law producing the results you demanded. Unlike human laws, natural laws don't change to suit the highest bidder.
One solution to replay attacks is obvious, but increases the RFID's power consumption, response time, and cost budgets. It's a public-key crypto challenge-response system, where the reader produces a random "challenge" sequence and the RFID encrypts the challenge with its private key to generate the "response". The reader then decrypts the response with the public key, verifying the RFID's private key. If the challenge is unique (for example, a 64 bit date-time value), then a replaying a recorded response will not defeat the system.
Against snoopers, it's as secure as the underlying public-key cipher. Against pick-pockets, it's no more secure than a credit card (i.e., not too good!). The drawback is that the RFID task is computationally intensive, requiring more complicated silicon to make it work and consuming more electrical power (perhaps requiring a battery-powered tag). In a security clearance application, that's probably acceptable.
"Here are the certifications, do you trust this?" Why, it came from "fedora-redhat.com", so of course you trust it!
Think about it: if you believe the phony web site is legitimate, you're likely to accept the matching bogus credentials, too. The credentials match the site, so what would arouse suspicion in anybody who already (incorrectly) trusts the web site? That is an inherent risk with a credential system: any attacker who can obtain a credential gains an appearance of legitimacy.
$10K? You'd better have a qualified lab with a proper set-up verify your results! $10K will barely buy a good used CISPR-16 compliant analyzer. You still need calibrated antennas, line impedance stabilization networks, and a compliant test site. If you don't make the measurements "by the book" with traceable, calibrated test equipment and set-ups then you haven't met your obligations under the EMC regulations. It's not cheap to have an outside lab verify your equipment, but it is a cost of doing business (as I tell my boss from time to time).
BPL isn't really likely to go where cable and DSL aren't feasible. The same economics apply to all: you need enough subscriber revenue per mile of line to be profitable. BPL may use existing wires, but it requires adding, maintaining, and powering expensive coupling equipment and repeaters to move signals through the system. Equipment that will be safe and reliable when connectged to 7KV power line is not cheap. BPL needs many customers per mile to have a good business case, just as cable and DSL do.
If you want to serve rural areas, WiMax is probably the best business choice. It will have lowest capital cost per square mile served, so it can be profitable in areas where the subscriber density is sparse.
California Highway Patrol uses low band (30-50MHz) radios extensively. They are essential for long-range coverage through the desert, where no repeater sites exist, and penetrate into canyons much more effectively than VHF-high (150MHz), UHF (470MHz) and trunked (800MHz) radio systems. There really is no effective replacement, and BPL is a serious threat to these systems in fringe areas (where they are needed most!).
Or they will go into your office, use your printer, and let the Secret Service throw your butt into prision. Evading printer "fingerprinting" doesn't require arcance technical know-how. Old-fashioned burglary skills will get the job done!
It should be a crime, and this bill will make it one. My impression is that this already is illegal: unauthorized use of a computer, unauthorized use of a telecommunications device, theft of service, fraud etc. Oh wait--it's an election year, and passing a useless feel-good law is a great way to campaign at the taxpayers' expense. Never mind!
Your old boss seesm to be upset that the latest cure-all didn't work. No surprise there, there's a long history of magic cures for product development that won't save a foundering company from itself. Managers want to believe there's really nothing wrong with their organization (and by inferrence, themselves). They just need to add that one little magical tweak to turn them into a World Class Operation. When their consultants' latest Management Fad of the Year produces the same poor results as the last one, it must be the fault of the system--not some shortcoming on their part!
Structured programming. Pascal. Formal verification. Ada. CASE tools. Object-oriented programming. Object-oriented analysis. Cross-platform development. Design re-use. Extreme programming. Program management professionals. Cross-functional teams. TQM. Each has valid and useful points. None is magic. Nothing can replace experience, motivation, and doing work you're proud to put under your name.
Under your name...one of the unsung strengths of open-source development! Nobody outside the company knows who put the bugs in closed source software. Open source developers sign their work for the world to see.
From tfa: The State Department last month invited formally invited [sic] an observer delegation from the Vienna-based Organization for Security and Cooperation (news - web sites) in Europe (OSCE (news - web sites)), a 55-nation body that encourages all member countries to observe each others' elections.
"Air Force One, we understand you're low on fuel, but please hold up on that emergency landing while the system reboots."
Half-way measures are not suitable for life-safety applications, no matter what OS you run. Get to the root cause and remove it, permanently. A cron job or "At" command is a kludgy work-around, not a solution. From the safety point of view, it's still broken no matter how you hide the flaw!
The answer is in your own post: (...oxygen - it binds with the iron to make rust?) Exactly! Iron is not a catalyst in this system; it is a reagent. So you are consuming water and iron to make the hydrogen and iron oxide, which means you need to smelt iron ore to feed the process. Smelting is an energy-intensive process (usually coal-fueled). Welcome back to the land of fossil fuel!
The local stations' contributions (ads, DJ chatter, contests, traffic reports) are exactly what MS left out. The playlist isn't a trade secret (their broadcasts reveal it), and the local demographics and statistics belong to Nielsen, Arbitron, and whoever else MS used for a source. The stations may not like it, but MS can use the same popularity polls they do.
Much as I hate to admit it, MS heeded to the plea I wrote on the last Arbitron survey I received: "Shut up and play the music!" Which is probably why that really was the last survey they'll ever send me...
Now, Bill, if you want to really please your audience let that playlist grow. Limiting your format to 20 titles is too boring and repetitious. With time to play more music, please play more songs by more performers--not the same song every hour, on the hour. It's scary when the Sunday Morning "top 40" show has better variety than than the regular programming, but that's happening in the major markets.
The owners of ATMs and the ATM networks (banks) have a vested interest in ensuring their proper performance. They (the owners) are subject to government regulation and audits, and will lose customers quickly if there is even a hint of dishonesty.
The owners of voting machines (the government) is perceived by the opposition parties as having an interest in their inaccuracy, in the incumbent party's favor. They are regulated and audited by those who could benefit from bias in the voting system.
It's a case of the fox guarding the hen house. With paper ballots, the count is witnessed by representatives of all parties. In a close race things will get acrimonious (see Florida, November-December 2000). But with the count being open, the actions of all involved are a matter of public record. The sunshine of public scrutiny isn't a perfect deterrent to election fraud, but it's the best we have. Hiding the count in an electronic box takes away that safeguard.
Slashdot Mirror
The wall end of the cord differs by country, but the equipment end is the same IEC-309 power coupling the world over. With the rising popularity of wide voltage range (100-250Vac, 47-63Hz) power supplies all you need is the local market's cord set. It's not that big a deal any more; just buy the cord locally and you're all set.
Will I ever do business with them? I remember their ads. They make these merchants appear to be stupid, greedy, unethical bandits. If they were the last dealer in town, I'd drive to another town just to avoid them.
Extending DST back into March, and especially prolonging it through November, is futile. On the winter side of the equinox dates, there isn't surplus daylight going to waste. You get up before dawn and start turning on lights as you get your kids out of bed and get yourself ready for work. You turn up the heat, because those pre-dawn hours are the coldest time of day (or the "set-back" thermostat does it for you). It's still dark when you leave for work, and it's already dark when you get home. If anything, DST should end a month earlier than it does now: no later than the end of September. At that time of year, setting the alarm clock for 6am means you wake up at dawn (think "equinox"). Enforcing DST during winter winter days means more people will be be and about before daybreak. That's counter-productive for energy savings!
(c) In addition, the transponder must be compatible with:
(2) interoperability standards established by the Texas Department of Transportation and other ntities for use of the system of toll roads and toll acilities in this state.
Don't confuse these with the passive RFID tag in your company's access-card badges. They're requiring active transponders, the ones that give your ID number to the toll road computer or the truck weight stations as you zip past at highway speeds.
Charger: 95% efficiency
Battery charge efficiency (AHr out/AHr in): 90%
Battery voltage efficiency (Vdischarge/Vcharge): 90%
Inverter efficiency: 95%
Motor efficiency: 90% Net plug-to-shaft efficiency: 66%. I used optimistic (but achievable) figures for this estimate, typical of switch-mode charger and inverter technology and not trying to charge the batteries too quickly. Going for a faster charge brings the efficiency down.
A further issue is the expense of battery replacement. No storage battery will last forever, and the cost of replacing them usually exceeds the value of all the electricity run through them before they wear out.
There remains a huge gap between what could be done and what is being done. The power for these cars is an additional load to our overtaxed power system; it will come from the new plants coming on line rather than the average of the existing plant base. There is no significant new hydro power or nuclear power coming on line in the USA. Solar, wind, and geothermal sources provide a fraction of the new power coming on line. Until the economic and regulatory climate makes cleaner power sources attractive to the utilities, the KWHrs these cars consume will come from burning fossil fuels: natural gas, coal and oil. Even if the economic and political considerations changed overnight the power mix will not immediately follow. Years of lead-time is required for power plant siting, design, and construction.
When you get to age when the eye doctor starts hinting about bifocals, have a set of glasses made specifically for CRT-distance. Not just lineless bifocals, but the reading Rx throughout a full-sized set of lenses. You'll be surprised how much easier it is on the eyes and the neck (no more contortions to see the screen in the lens' "reading zone"). And if your job requires safety glasses, your company may even pay for them!
I see the bigger problem not being data theft, but the ability to scan people to see who's carrying a passort. Passport = tourist, a target for criminals. Tinfoil wallets, anyone?
But most system "crashes" really are software bugs, making the system unresponsive to all attempts to regain control. Even control-alt-middle finger won't get the system to respond. Nothing to do except hit the reset button (or pull the plug, if your system is "modern" enough to lack a reset switch) and curse loudly while it reboots. The user doesn't care why, all they know is the damn thing just wasted a lot of their work again, while the boss is breathing down their neck about making a deadline...
To use an extreme counter example, the venerable Eimac 4-1000A tetrode (cathode driven) can deliver 1.5KW output (+62dBm) with -30dB IMD3 products and 12dB gain at 14MHz. That puts the output IP3 at +77dBm, and input IP3 at +65dBm. Try to beat that with a single transistor!
You need to use the part that's appropriate for the application. You'd never use a 4-1000A for an LNA, but you don't build a large power amplifier with GASFETs, either.
Assuming the article wasn'r a work of satire, which it certainly could be!
The steps are out of sequence. First you need the newly discovered anomaly, then you investigate it to see what it means and where it leads. You don't decide on a destination, then throw around truckloads of money hoping to discover a new physical law producing the results you demanded. Unlike human laws, natural laws don't change to suit the highest bidder.
Against snoopers, it's as secure as the underlying public-key cipher. Against pick-pockets, it's no more secure than a credit card (i.e., not too good!). The drawback is that the RFID task is computationally intensive, requiring more complicated silicon to make it work and consuming more electrical power (perhaps requiring a battery-powered tag). In a security clearance application, that's probably acceptable.
Think about it: if you believe the phony web site is legitimate, you're likely to accept the matching bogus credentials, too. The credentials match the site, so what would arouse suspicion in anybody who already (incorrectly) trusts the web site? That is an inherent risk with a credential system: any attacker who can obtain a credential gains an appearance of legitimacy.
$10K? You'd better have a qualified lab with a proper set-up verify your results! $10K will barely buy a good used CISPR-16 compliant analyzer. You still need calibrated antennas, line impedance stabilization networks, and a compliant test site. If you don't make the measurements "by the book" with traceable, calibrated test equipment and set-ups then you haven't met your obligations under the EMC regulations. It's not cheap to have an outside lab verify your equipment, but it is a cost of doing business (as I tell my boss from time to time).
If you want to serve rural areas, WiMax is probably the best business choice. It will have lowest capital cost per square mile served, so it can be profitable in areas where the subscriber density is sparse.
California Highway Patrol uses low band (30-50MHz) radios extensively. They are essential for long-range coverage through the desert, where no repeater sites exist, and penetrate into canyons much more effectively than VHF-high (150MHz), UHF (470MHz) and trunked (800MHz) radio systems. There really is no effective replacement, and BPL is a serious threat to these systems in fringe areas (where they are needed most!).
Or they will go into your office, use your printer, and let the Secret Service throw your butt into prision. Evading printer "fingerprinting" doesn't require arcance technical know-how. Old-fashioned burglary skills will get the job done!
It should be a crime, and this bill will make it one. My impression is that this already is illegal: unauthorized use of a computer, unauthorized use of a telecommunications device, theft of service, fraud etc. Oh wait--it's an election year, and passing a useless feel-good law is a great way to campaign at the taxpayers' expense. Never mind!
Structured programming. Pascal. Formal verification. Ada. CASE tools. Object-oriented programming. Object-oriented analysis. Cross-platform development. Design re-use. Extreme programming. Program management professionals. Cross-functional teams. TQM. Each has valid and useful points. None is magic. Nothing can replace experience, motivation, and doing work you're proud to put under your name.
Under your name...one of the unsung strengths of open-source development! Nobody outside the company knows who put the bugs in closed source software. Open source developers sign their work for the world to see.
Not every nation does, but many do!
Half-way measures are not suitable for life-safety applications, no matter what OS you run. Get to the root cause and remove it, permanently. A cron job or "At" command is a kludgy work-around, not a solution. From the safety point of view, it's still broken no matter how you hide the flaw!
The answer is in your own post: (...oxygen - it binds with the iron to make rust?) Exactly! Iron is not a catalyst in this system; it is a reagent. So you are consuming water and iron to make the hydrogen and iron oxide, which means you need to smelt iron ore to feed the process. Smelting is an energy-intensive process (usually coal-fueled). Welcome back to the land of fossil fuel!
Much as I hate to admit it, MS heeded to the plea I wrote on the last Arbitron survey I received: "Shut up and play the music!" Which is probably why that really was the last survey they'll ever send me...
Now, Bill, if you want to really please your audience let that playlist grow. Limiting your format to 20 titles is too boring and repetitious. With time to play more music, please play more songs by more performers--not the same song every hour, on the hour. It's scary when the Sunday Morning "top 40" show has better variety than than the regular programming, but that's happening in the major markets.
The owners of voting machines (the government) is perceived by the opposition parties as having an interest in their inaccuracy, in the incumbent party's favor. They are regulated and audited by those who could benefit from bias in the voting system.
It's a case of the fox guarding the hen house. With paper ballots, the count is witnessed by representatives of all parties. In a close race things will get acrimonious (see Florida, November-December 2000). But with the count being open, the actions of all involved are a matter of public record. The sunshine of public scrutiny isn't a perfect deterrent to election fraud, but it's the best we have. Hiding the count in an electronic box takes away that safeguard.