Nearly all long distance links are single-mode fiber, because multi-mode fiber results in dispersion and low signal quality at longer distances. You can't run QAM over single-mode fiber. Assuming the breakthrough here is a new modulation technique that allows for such longer distance links, you would still need to run all new fiber.
Electric motors produce motion without losing any mass
Rockets produce motion without losing mass either. The body moves in one direction, the propellant moves in the opposite direction, and the combined system encompassing both remains in place. That is exactly how an electric motor produces motion, because the system as a whole doesn't move.
so I don't really see why it's impossible for there to be some way of producing thrust in a vacuum using only energy.
It's not impossible. You're describing what's called a "photon drive". You shine light out the back, and you have an ever so slight "pressure" that drives you forward. Alternatively, someone else shines a light on your back, and that same pressure drives you forward. This is how solar sails operate. These work, we've tested them experimentally and the results match up with the theory. You just need obscene amounts of power for negligible thrust.
The problem here is now we're talking about something that is several orders of magnitude more efficient in converting energy into momentum.
I expect it's not worth the trouble to implement since any way you do it you need a bunch of extra equipment on the car to figure out what the speed limit is, which makes the feature more expensive
The car already has cameras and GPS, and uses both machine vision and mapping to determine the local speed limit. As of the beginning of this year, speed limits are enforced for residential and undivided roads. US27 is a divided highway, and thus the software only warns that you're speeding.
Maybe they need a way to keep the driver involved: steering wheel pressure sensors, or eye sensors.
The system already does this, and will throw visible and audible warnings, before eventually slowing to a stop if the driver does not take action to confirm they are still maintaining control.
As designed, Tesla's Autopilot is not what many people think an autopilot is; it's a driver-assist feature and not an autonomous driving system.
But Tesla's Autopilot is what an autopilot actually is. It's a driver aid, that exists to reduce a driver's workload while behind the wheel, not eliminate it entirely. Just because a pilot turns the autopilot on does not mean they are magically no longer the pilot and can zone out.
As such it makes people less safe on the road for themselves and others when they engage it;
People make themselves less safe on the road by not understand how their vehicle operates.
No. Autopilot was active during an accident. The truck caused the accident by turning left in front of oncoming traffic. The car had the right of way, and the truck was supposed to wait for the car to clear before continuing. Autopilot failed to prevent the accident, in the same way automatic emergency braking systems offered by other brands may similarly fail to detect an unexpected obstacle and stop.
Because if you just buy the $100 unit and upgrade it easily on a whim, there's no reason for you to go out and pay the TV manufacturers $1000 for a new TV every few years, and they lose the huge market they were enjoying when actually continuously improving their product.
The comment on the cheap switch was that they had the SWIFT servers connected to the same dumb switch as other unprotected computers in the building. More expensive switches would have allowed them to isolate those servers on their own network, as would one extra dumb switch dedicated to those servers, but either would have required them to install a router to link the two networks. It's all ultimately just a "no firewall" issue.
Finding out what there is about cancer that limits it to one individual could be the key we have been looking for.
It's the same thing that requires you to take immunosuppressants when you receive an organ transplant. Your cancer is you, and someone else's cancer is not. Your body has a much easier time recognizing that transmitted cancer is a foreign infection that needs to be fought off.
There's still a cliff. There has to be a cliff, although in the opposite direction of what you currently see. There has to be a significant jump in wages by getting off your ass and working in order to motivate people to do so. It penalizes companies, as those low end jobs now have to be paid significantly above what used to be minimum wage, counting both direct wages and wages paid in through new corporate taxes.
The alternative is to try to call them "dual module" processors, and then go through a big long explanation to customers who really don't care what "module" actually is.
Can it execute two separate threads simultaneously? Yes. At full performance? Mostly, although with a shared frontend, when both units are running at full load, instruction disp---- Is someone trying to make a practical judgement of a chip's performance based solely on its core count going to have a clue what any of that means? No. Then it's a four-core processor.
The US went chip & signature instead of chip & PIN, so the entire change is basically meaningless.
How so? With chip and PIN, if your card is stolen, the attacker either has to accurately guess the PIN before the chip self destructs (unlikely, but not impossible), or disassemble the chip to extract the data. It buys you a small amount of time to contact your card issuer, and have your card key deactivated. With just chip, your card is stolen, and can be used immediately, so you potentially have a couple additional transactions that you would not have had were it protected with a PIN.
In either case, the card must be stolen. That's the real purpose. A stolen card with a PIN is only going to buy you a few extra hours. The real protection is that the private key stored on the card cannot be non-destructively accessed. It cannot be skimmed without the owner's knowledge. It cannot be stored by a retailer and compromised. The owner is expected to notice the loss of the card and report it to their issuer, deactivating the key.
Ultimately, it's still a violation of the NEC. You can run low voltage signaling through high voltage conduits, provided proper wiring, but standard CAT6 and its endpoints is not rated for that. Is it going to cause any practical problems in residential wiring? Assuming you're using shielded and properly grounded CAT6, probably not, but you may run into trouble if you have to file an insurance claim or try to sell the property.
Not "commercial flights as we know them", just "commercial flights, period". Commercial aviation only exists because it exists as it does. You mandate solar power, and now you've mandated aircraft that are no faster than wheeled vehicles. Transportation would shift back to those vastly cheaper wheeled vehicles, and commercial aviation would all but go away.
It's a safety issue. You expect your low voltage wire to actually be low voltage, and safe. If there is damage within the conduit, and wires are crossed, those low voltage lines may be carrying dangerous voltage.
This isn't a particle accelerator. You're accelerating your launch vehicle with the very same magnets which are levitating it around that curved track. If they can bend it around a 1km radius, they can accelerate it linearly in a shorter distance than that.
There's also the minor issue with all launch rails, linear or circular, that your orbital inclination is basically fixed by the installation. You're not going to have the energy to perform any significant plane change at 8km/s, especially with a kick motor that's supposed to survive a 2000g launch.
Slashdot Mirror
Good for backhauls
Nearly all long distance links are single-mode fiber, because multi-mode fiber results in dispersion and low signal quality at longer distances. You can't run QAM over single-mode fiber. Assuming the breakthrough here is a new modulation technique that allows for such longer distance links, you would still need to run all new fiber.
Do they? I've been unable to find the setting in the UI, and adjusting it manually over SSH doesn't survive a reboot.
Electric motors produce motion without losing any mass
Rockets produce motion without losing mass either. The body moves in one direction, the propellant moves in the opposite direction, and the combined system encompassing both remains in place. That is exactly how an electric motor produces motion, because the system as a whole doesn't move.
so I don't really see why it's impossible for there to be some way of producing thrust in a vacuum using only energy.
It's not impossible. You're describing what's called a "photon drive". You shine light out the back, and you have an ever so slight "pressure" that drives you forward. Alternatively, someone else shines a light on your back, and that same pressure drives you forward. This is how solar sails operate. These work, we've tested them experimentally and the results match up with the theory. You just need obscene amounts of power for negligible thrust.
The problem here is now we're talking about something that is several orders of magnitude more efficient in converting energy into momentum.
No, but the estimate changes based off whose methods you're using to produce them.
Because the trailer turned left, across the road, in front of the car.
I expect it's not worth the trouble to implement since any way you do it you need a bunch of extra equipment on the car to figure out what the speed limit is, which makes the feature more expensive
The car already has cameras and GPS, and uses both machine vision and mapping to determine the local speed limit. As of the beginning of this year, speed limits are enforced for residential and undivided roads. US27 is a divided highway, and thus the software only warns that you're speeding.
Maybe they need a way to keep the driver involved: steering wheel pressure sensors, or eye sensors.
The system already does this, and will throw visible and audible warnings, before eventually slowing to a stop if the driver does not take action to confirm they are still maintaining control.
As designed, Tesla's Autopilot is not what many people think an autopilot is; it's a driver-assist feature and not an autonomous driving system.
But Tesla's Autopilot is what an autopilot actually is. It's a driver aid, that exists to reduce a driver's workload while behind the wheel, not eliminate it entirely. Just because a pilot turns the autopilot on does not mean they are magically no longer the pilot and can zone out.
As such it makes people less safe on the road for themselves and others when they engage it;
People make themselves less safe on the road by not understand how their vehicle operates.
No. Autopilot was active during an accident. The truck caused the accident by turning left in front of oncoming traffic. The car had the right of way, and the truck was supposed to wait for the car to clear before continuing. Autopilot failed to prevent the accident, in the same way automatic emergency braking systems offered by other brands may similarly fail to detect an unexpected obstacle and stop.
The commenting system really needs to start letting people rate their own comments as sarcastic...
Because if you just buy the $100 unit and upgrade it easily on a whim, there's no reason for you to go out and pay the TV manufacturers $1000 for a new TV every few years, and they lose the huge market they were enjoying when actually continuously improving their product.
The comment on the cheap switch was that they had the SWIFT servers connected to the same dumb switch as other unprotected computers in the building. More expensive switches would have allowed them to isolate those servers on their own network, as would one extra dumb switch dedicated to those servers, but either would have required them to install a router to link the two networks. It's all ultimately just a "no firewall" issue.
Finding out what there is about cancer that limits it to one individual could be the key we have been looking for.
It's the same thing that requires you to take immunosuppressants when you receive an organ transplant. Your cancer is you, and someone else's cancer is not. Your body has a much easier time recognizing that transmitted cancer is a foreign infection that needs to be fought off.
There's still a cliff. There has to be a cliff, although in the opposite direction of what you currently see. There has to be a significant jump in wages by getting off your ass and working in order to motivate people to do so. It penalizes companies, as those low end jobs now have to be paid significantly above what used to be minimum wage, counting both direct wages and wages paid in through new corporate taxes.
The alternative is to try to call them "dual module" processors, and then go through a big long explanation to customers who really don't care what "module" actually is.
Can it execute two separate threads simultaneously? Yes. At full performance? Mostly, although with a shared frontend, when both units are running at full load, instruction disp---- Is someone trying to make a practical judgement of a chip's performance based solely on its core count going to have a clue what any of that means? No. Then it's a four-core processor.
The US went chip & signature instead of chip & PIN, so the entire change is basically meaningless.
How so? With chip and PIN, if your card is stolen, the attacker either has to accurately guess the PIN before the chip self destructs (unlikely, but not impossible), or disassemble the chip to extract the data. It buys you a small amount of time to contact your card issuer, and have your card key deactivated. With just chip, your card is stolen, and can be used immediately, so you potentially have a couple additional transactions that you would not have had were it protected with a PIN.
In either case, the card must be stolen. That's the real purpose. A stolen card with a PIN is only going to buy you a few extra hours. The real protection is that the private key stored on the card cannot be non-destructively accessed. It cannot be skimmed without the owner's knowledge. It cannot be stored by a retailer and compromised. The owner is expected to notice the loss of the card and report it to their issuer, deactivating the key.
Do they offer any products for blocking forum spam?
Ultimately, it's still a violation of the NEC. You can run low voltage signaling through high voltage conduits, provided proper wiring, but standard CAT6 and its endpoints is not rated for that. Is it going to cause any practical problems in residential wiring? Assuming you're using shielded and properly grounded CAT6, probably not, but you may run into trouble if you have to file an insurance claim or try to sell the property.
Not "commercial flights as we know them", just "commercial flights, period". Commercial aviation only exists because it exists as it does. You mandate solar power, and now you've mandated aircraft that are no faster than wheeled vehicles. Transportation would shift back to those vastly cheaper wheeled vehicles, and commercial aviation would all but go away.
It's a safety issue. You expect your low voltage wire to actually be low voltage, and safe. If there is damage within the conduit, and wires are crossed, those low voltage lines may be carrying dangerous voltage.
The idea of solar powered heavier-than-air flight necessitates this manner of design.
Run low voltage lines through the same conduit as your high voltage power?
They're not that far off. You're still talking 3-5% of the energy involved.
This isn't a particle accelerator. You're accelerating your launch vehicle with the very same magnets which are levitating it around that curved track. If they can bend it around a 1km radius, they can accelerate it linearly in a shorter distance than that.
There's also the minor issue with all launch rails, linear or circular, that your orbital inclination is basically fixed by the installation. You're not going to have the energy to perform any significant plane change at 8km/s, especially with a kick motor that's supposed to survive a 2000g launch.
You do realize that they've been making roller coasters out of basically the same thing for decades, right?