Have you completely forgotten about DUI checkpoints? Everyone gets stopped, and they either take the breathalyzer or they get arrested for failing to give a sample.
IS that how it really works in your state? The last time I was stopped in VA at a checkpoint they asked to see my license, etc, and sent me on my way. They use that time to sniff for alcohol fumes and check for slurred speech, etc (you know, probable cause of DUI). If they don't have PC, they can't whip out the breathalyzer.
They're not just filters, they're transformers that (as a result of their inductance and capacitance characteristics) also act as filters. I chose molex simply because they were first on the search and seemed informative.
They've been called 'magnetics' in this context for quite a while - I guess it's a bit of an industry standard. They also have cute terms like PHY and MAC.
I have, thank you, and the transformer can be used to do exactly what I said as well as for pure isolation with the resultant signals retaining their differential status. Please consider that there are other Ethernet circuits than the one(s) you're familiar with before making general statements. Some really do need single-ended signals into the PHY.
Without the intervening transformer, the TX- and RX- lines would be tied together at ground on the device. In the diagram below, the differential RX+/- and TX+/- signals are turned into single-ended RX and TX by the transformers. Removing the transformers connects RX- and TX- to ground, which is a Bad Thing(tm).
As I stated in the other, non-annointed article and posted here, the magnetics are actually tiny transformers used to convert from differential to single-ended signals and to isolate. Additionally center taps can be used for PoE.
"The magnetics in question aren't to hold the connector in like those in a Mac power cord, but rather the tiny transformers that are required for Ethernet differential signal isolation/transformation."
The magnetics in question aren't to hold the connector in like those in a Mac power cord, but rather the tiny transformers that are required for Ethernet differential signal isolation/transformation.
Regardless of how helmet laws were 'sold', the GOAL was to prevent injury to the rider BECAUSE it would save tax dollars paying for preventable injury.
As for seat belts, just because you happen to use them to hold you in your seat doesn't mean that's their primary, overriding, and mandated purpose. The purpose of seat belts is to prevent the driver from sustaining injury TO THEMSELVES during a crash. If your supposition were true then all that would be needed is a tiny belt around your waist connected to the driver's side B pillar or a strip of velcro.
It's amazing how your 'my little world' experience suddenly applies to the real world.
I agree that it's completely counter-intuitive and bizarre to boot, but if he's correct then there's a whole world of communications out there we're missing. The A-B effect is strange enough on its own.
Maybe teaching the E and B version instead of the A potential version of Maxwell's Equations has limited our thinking. The A-B effect seems to indicate that the A potential is real and not just a mathematical invention.
If you have access to a QEX archive (perhaps a local ham radio operator) the article is a pretty interesting read. It's light on math (thank heaven) but tries to explain what he's doing, with photos and details of the experimental setup. He's taken precautions against receiving 'plane' (plane waves - it a joke, son!) old EM waves.
Supposedly some experimenters are getting results using optical fibers to receive these waves.
Google around a bit for "Vector potential waves" - a (presumably PhD level) professor and his wife are doing work on this very subject at McMaster U. in Canada. this is the basis for it. This really messes with the classical interpretation of the double slit experiment - add a solenoid and all bets are off!
Thanks for the pointer - that helps. My concept of 'twist rate' seems to be borne out as |m|, although what's shown seems to be the whole EM wave spiraling vs the E and M components being polarized. That's cool!
You might also be interested in this ham's work which exploits the Aharonov-Bohm Effect:
Robert Zimmerman, NP4B/VE3RKZ, describes five years of research at McMaster University in “Transmission and Reception of Longitudinally-Polarized Momentum Waves.” James Clerk Maxwell’s famous equations of electromagnetic radiation predict an alternative form of radiation, which Zimmerman refers to as vector potential radiation. He was involved in research that results in a demonstration of the communications potential of what was previously considered to be only a theoretical curiosity.
Google around a bit for 'vector potential waves'. Here's one tantalizing snippet. According to Zimmerman and others, metallic antennas are useless to receive these waves - Zimmerman uses plasma in the form of a fluorescent bulb!
As I said in the other, non-annointed article on this subject:
I'm not an EM genius, but this sounds an awful lot like circular polarization with perhaps a selectable 'twist' rate. I'd love to see a 3D diagram of a vortex wave vs a circularly polarized wave propagating - that would help me understand what's happening.
I've heard 'snake oil' commercials on the radio using words like 'clinically-proven' and 'FDA-cleared' to try to make people believe their particular 'dietary supplement' can actually cure disease without actually saying it.
I'm as against unneeded gov't intrusion as anyone, but shouldn't anything sold for human consumption be at least tested if not regulated, and anything that claims to be a supplement have to be proven to: 1) actually supplement something the body uses, and 2) work as claimed?
I'm so sick of all the weight loss/men's performance/hair loss/etc pills out there!
It is not an either/or proposition. A large number of those who have never read the T's and C's can still be confused about what T's and C's they're bound to by using the service.
Slashdot Mirror
Refusing the test may raise suspicion by the cop that you have things that aren't in order.
In Virginia refusing the test gets your license yanked for a good long while.
Have you completely forgotten about DUI checkpoints? Everyone gets stopped, and they either take the breathalyzer or they get arrested for failing to give a sample.
IS that how it really works in your state? The last time I was stopped in VA at a checkpoint they asked to see my license, etc, and sent me on my way. They use that time to sniff for alcohol fumes and check for slurred speech, etc (you know, probable cause of DUI). If they don't have PC, they can't whip out the breathalyzer.
They're not just filters, they're transformers that (as a result of their inductance and capacitance characteristics) also act as filters. I chose molex simply because they were first on the search and seemed informative.
They've been called 'magnetics' in this context for quite a while - I guess it's a bit of an industry standard. They also have cute terms like PHY and MAC.
I have, thank you, and the transformer can be used to do exactly what I said as well as for pure isolation with the resultant signals retaining their differential status. Please consider that there are other Ethernet circuits than the one(s) you're familiar with before making general statements. Some really do need single-ended signals into the PHY.
Without the intervening transformer, the TX- and RX- lines would be tied together at ground on the device. In the diagram below, the differential RX+/- and TX+/- signals are turned into single-ended RX and TX by the transformers. Removing the transformers connects RX- and TX- to ground, which is a Bad Thing(tm).
RX+_____3 E_______RX
3 E
3 E
RX-_____3 E_____GND
TX+_____3 E_______TX
3 E
3 E
TX-_____3 E_____GND
As I stated in the other, non-annointed article and posted here, the magnetics are actually tiny transformers used to convert from differential to single-ended signals and to isolate. Additionally center taps can be used for PoE.
"The magnetics in question aren't to hold the connector in like those in a Mac power cord, but rather the tiny transformers that are required for Ethernet differential signal isolation/transformation."
The magnetics in question aren't to hold the connector in like those in a Mac power cord, but rather the tiny transformers that are required for Ethernet differential signal isolation/transformation.
Farnham's Freehold by R.A. Heinlein. Strange post-apocalyptic tale of a family that was prepared for 'the big bomb' and survived.
Especially when I constantly hear ads on tv screaming "Own It Today On DVD!"
I believe another salient quote from that same video document is "She's-a round, she's-a firm, she's-a fully packed!"
No, but chilling air to liquid hydrogen temperatures is observing it.
So the amount of data ... is still limited to a finite amount by limits in the hardware of ... the device you are using.
What happens when the cell provider 'updates' your phone to limit the transfer speed to 'prevent overheating' or to 'increase hardware reliability'?
How do you know they don't already impose artificial limits on the transfer speed that lower the effective rate below the phone's native capabilities?
Your weak arguments do not make you correct.
Regardless of how helmet laws were 'sold', the GOAL was to prevent injury to the rider BECAUSE it would save tax dollars paying for preventable injury.
As for seat belts, just because you happen to use them to hold you in your seat doesn't mean that's their primary, overriding, and mandated purpose. The purpose of seat belts is to prevent the driver from sustaining injury TO THEMSELVES during a crash. If your supposition were true then all that would be needed is a tiny belt around your waist connected to the driver's side B pillar or a strip of velcro.
It's amazing how your 'my little world' experience suddenly applies to the real world.
I agree that it's completely counter-intuitive and bizarre to boot, but if he's correct then there's a whole world of communications out there we're missing. The A-B effect is strange enough on its own.
Maybe teaching the E and B version instead of the A potential version of Maxwell's Equations has limited our thinking. The A-B effect seems to indicate that the A potential is real and not just a mathematical invention.
If you have access to a QEX archive (perhaps a local ham radio operator) the article is a pretty interesting read. It's light on math (thank heaven) but tries to explain what he's doing, with photos and details of the experimental setup. He's taken precautions against receiving 'plane' (plane waves - it a joke, son!) old EM waves.
Supposedly some experimenters are getting results using optical fibers to receive these waves.
Not according to the NOAA/Space Weather Prediction Center. Close, though. Solar flux has been terrible lately - 10m was wide open back in late October with flux values of 140 or higher. We're barely above 100 right now with a massive contest on for this weekend. Durn it!
Google around a bit for "Vector potential waves" - a (presumably PhD level) professor and his wife are doing work on this very subject at McMaster U. in Canada. this is the basis for it. This really messes with the classical interpretation of the double slit experiment - add a solenoid and all bets are off!
A Modern Physics Letters B Paper on the subject at hand.
I read about it first in the Amateur Radio publication QEX.
Thanks for the pointer - that helps. My concept of 'twist rate' seems to be borne out as |m|, although what's shown seems to be the whole EM wave spiraling vs the E and M components being polarized. That's cool!
The images in the right column of the diagram look suspiciously like propagation modes in circular waveguide to me.
You might also be interested in this ham's work which exploits the Aharonov-Bohm Effect:
Robert Zimmerman, NP4B/VE3RKZ, describes five years of research at McMaster University in “Transmission and Reception of Longitudinally-Polarized Momentum Waves.” James Clerk Maxwell’s famous equations of electromagnetic radiation predict an alternative form of radiation, which Zimmerman refers to as vector potential radiation. He was involved in research that results in a demonstration of the communications potential of what was previously considered to be only a theoretical curiosity.
Google around a bit for 'vector potential waves'. Here's one tantalizing snippet. According to Zimmerman and others, metallic antennas are useless to receive these waves - Zimmerman uses plasma in the form of a fluorescent bulb!
As I said in the other, non-annointed article on this subject:
I'm not an EM genius, but this sounds an awful lot like circular polarization with perhaps a selectable 'twist' rate. I'd love to see a 3D diagram of a vortex wave vs a circularly polarized wave propagating - that would help me understand what's happening.
I did read it, thank you.
Try this thought experiment.
Ask 100 google users this question:
"Are you confused by the Terms and Conditions that you are bound to when using Google services?"
Followed by this question:
"Have you read the Terms and Conditions that you are bound to when using Google services?"
IMHO you have a high probability of getting more than a few Yes/No answer pairs.
The Government doesn't intervene to stop people hurting themselves, though, does it?
Mandatory seatbelts, mandatory seatbelt use, mandatory airbags, mandatory helmets for motorcycle riders ...
I've heard 'snake oil' commercials on the radio using words like 'clinically-proven' and 'FDA-cleared' to try to make people believe their particular 'dietary supplement' can actually cure disease without actually saying it.
I'm as against unneeded gov't intrusion as anyone, but shouldn't anything sold for human consumption be at least tested if not regulated, and anything that claims to be a supplement have to be proven to: 1) actually supplement something the body uses, and 2) work as claimed?
I'm so sick of all the weight loss/men's performance/hair loss/etc pills out there!
It is not an either/or proposition. A large number of those who have never read the T's and C's can still be confused about what T's and C's they're bound to by using the service.
Read this
They're too busy pretending they know more about this than the people at NASA, who are actually planning the mission.
No, they're too busy PROVING they know more about this than the people IN CONGRESS, who are actually FUND the mission.
FTFY.
Yeah, 5 times as many people are likely killed by distracted drivers using their cell phone but still no ban. If you are driving, DRIVE. If you need to talk, pull over.