Everything is DC? Your fridge? Your stove? Geyser? Vacuum cleaner? Washer? Dryer? Everything high power is AC. What may happen is we may standardize that brick. Maybe centralize it in the house. But AC will remain, and rightly so. It is far more efficient to transmit and change voltages with AC. Also AC motors do have some advantages.
Brushless DC motors are better than AC squirrel cage motors at household size, the only time inductive motors are better is at industrial levels where electromagnets are stronger than rare earth magnets can be while drawing negligible current. Switch-mode DC-DC power supplies are more efficient than AC-AC inductive voltage converters. The efficiency of transmission is because of the voltage, not because of the AC. If the wall supplied 120V DC it would be possible to leave out the rectifier, essentially cutting out a 2V loss on the output. Hell, most electronics chargers these days convert the 120V AC to ~150V DC then applying either a switch mode supply or a high frequency AC inductive step down. The only thing which relies on AC are motors which need the 60hz timing, eg some fridges where the direction the motor spins doesn't matter, and those big motors which run off of 3-phase. So really, it's not as big of an issue as you make it.
Sure, back in the day, AC was better because we didn't have the transistor technology to step voltages up and down with charge pumps and switch-mode regulators. But this has ALL changed...
The consumption from the switching is due to the capacitance at the gate. This is why smaller transistors are better, smaller transistors --> smaller gate --> smaller capacitance --> less switching power. Lower voltages mean the same thing, since you can use a weaker dielectric without it breaking down and thus lower the capacitance further (eg in DRAM), thereby lowering power consumption.
How about graphene? It is an extremely good conductor, and that is all, in essence making no difference at all. They still haven't figured out how to even make a bandgap with it, which means that the capacitance of whatever technology is used is essentially unknown. One aspect that might help, because of the high conductivity, is that we could make the circuit tracks thinner (eg just one layer of atoms thick), which could reduce inter-track capacitance. The actual capacitance at the gate, however, is still a complete unknown.
PSOC3 FirstTouch Starter kit costs $50 and even comes with a USB cable for programming and/or power, and a 9V battery for when you want it away from wires.
It has an Intel 8051 (remember those?), is slightly smaller than a RaspberryPi, has GPIO/I2C/SPI/UART, has an onboard FPGA to handle all of the IO as well as extra blocks for things like DSP, coms interrupts and buffers, fast hardware lookup tables, custom logic etc. Internal ADCs, internal DACs, internal comparators, internal 25mA opamps. Analogue can be routed through almost any IO. Internal voltage boost so that you can power it off of lower voltage than the VDDIO. It even comes with a cool Labview-like setup program for configuring all of the IOs and FPGA blocks. Their chips sell for a couple dollars.
The only problem Slashdot has with it is that it doesn't run Linux. And no, I'm not affiliated with them, I just like their hardware. They also make the PSOC5, which has an ARM Cortex M3, but that still isn't enough to do your GPIO programming onboard in Python.
You missed his main point. Just like the car brought about a complete rethink compared to horses and carts, there could be some radically game changing technology introduced which makes cars redundant within cities. My personal bet is along the lines of robotic taxis...
Please look up a definition of satire and post it here so I can tell that you have. Once you've done that please answer the following question: what aspect of Team America was not satire?
In the original script the Matrix was actually *run* on the human brains, but execs thought that would be too complicated for the masses, so they changed it to 'harness the electrical and heat energy'. Which makes no sense, as electric eels would have been a much better candidate than keeping around a possibly hostile, intelligent race.
How about doctors who are on call, and you can know from their location which one to call for emergencies. Set up a framework so that their actual location is still confidential, but given a location it is possible to discover who is closest?
There are many situations where it would be useful, but like any new technology, it can also be abused. It all comes down to ethics at the end of the day.
Or they can rainbow table for the string formed by [username + password]. Just prune off the values that don't start with the username. Usernames are typically made up of the same alphanumeric patterns as passwords, and aren't that long. It is better to use a random, large salt which has no patterns that can be exploited by future weaknesses discovered in the algorithm, and can be stored along with the hash. Adding a 500 byte random salt makes building a rainbow table just a little weeny bit harder... and if you aren't interested in storing an extra 1/2 a KB as a measure to keep your client's passwords safe, you should probably re-evaluate your priorities.
Sure, a laptop, something with a built-in screen and built-in keyboard and built-in mouse. It's almost like it was made to not require wires or something...
A Pi will need all of the above externally, so if you're going to bother with those, how about just a wireless dongle?
Every single able bodied person you know has the capacity to commit murder. That's not a good enough reason to never tell anybody where you live, or what your work involves, or any other thing which might facilitate them killing you. Instead, you wait until you know them before giving them anything which they might use against you.
Google has been around a while, and has demonstrated what I would like to call 'integrity of character'. Sure, they collect information on you, but they've worked out a way that they can make money from that without spamming you with ghastly ads or selling your information to people who will use it against you. Personally, I have no problem with the way they've conducted themselves so far, and as such I'm willing to trust them with my personal information.
Facebook, on the other hand, has been terrible. They've continuously asked for the most private of data, their privacy policy keeps changing, anything you upload belongs to them, and their default privacy settings are exceptionally lax. Despite this, and a slew of annoying ads, they still aren't making much money (through revenue, not investment), so they're going to have to start turning the screws one of these days.
I also have a Facebook profile, but I'm careful what I put up. My profile tends to be funny posts from 9gag, interesting articles I've found online and witticisms, all of which I don't believe will ever be able to be used against me or advertised with effectively.
I personally think in the middle of a desert would be the ideal situation. Preferably as far from any major fault lines as possible.
And I imagine that a meteorite strike for instance in the Gulf of Mexico would also result in millions of casualties. All the islands and coastal cities at less than 50 foot altitude would be wiped out. Never mind the chaos looters would cause in the aftermath. And that 50 foot estimate is very conservative.
Sure, an ocean strike would give you a little extra time. But how many people could you extract from Miami or NYC in 1 hour? Considering then that Florida has an average height of just 100ft...
Yeah, but the trouble is that it's just a matter of time before there won't be anywhere left to move. There will come a time when the coast is stormy, inland has tornados, the poles are just giant mudpiles of melting permafrost and the equator has malaria. How about facing the problem instead of running away?
I really don't get the anti-Google vibes. Why would people that care about privacy take a worse view of Google than of Facebook? Google has never sold the data they collected or turned over to nasty governments anything that they were not forced to. And that is post-IPO. Imagine what Facebook is going to be like privacy-wise in a few years time, once they realise that they actually need to make a profit?
Yeah, because that would be a logical choice for the rest of the world. You do realise that the US is much smaller than the rest of the world combined?
The laser Ti benificiation is the strongest additive manufacturing process available at the moment, and even it is very brittle because of the thermal stresses formed when it is produced. These are because as the laser melts the particles they are much hotter than the parts it is bonded with, and as they cool they shrink causing lots of stresses all throughout the material. That said, being able to make a ball inside of a socket during the manufacturing process is quite useful sometimes... not to speak of woven Ti mesh for grafts and such.
About those flamebait mods... your sig really won't help your case here.
And what you call 'leftist' is more conservative than pretty much everything except Fascist Italy and Spain and Nazi Germany, all of the 20s, 30s and 40s. Hell, even Nixon was trying to bring in universal health care, and he was considered conservative for his time.
Slashdot Mirror
Everything is DC? Your fridge? Your stove? Geyser? Vacuum cleaner? Washer? Dryer? Everything high power is AC. What may happen is we may standardize that brick. Maybe centralize it in the house. But AC will remain, and rightly so. It is far more efficient to transmit and change voltages with AC. Also AC motors do have some advantages.
Brushless DC motors are better than AC squirrel cage motors at household size, the only time inductive motors are better is at industrial levels where electromagnets are stronger than rare earth magnets can be while drawing negligible current. Switch-mode DC-DC power supplies are more efficient than AC-AC inductive voltage converters. The efficiency of transmission is because of the voltage, not because of the AC. If the wall supplied 120V DC it would be possible to leave out the rectifier, essentially cutting out a 2V loss on the output. Hell, most electronics chargers these days convert the 120V AC to ~150V DC then applying either a switch mode supply or a high frequency AC inductive step down. The only thing which relies on AC are motors which need the 60hz timing, eg some fridges where the direction the motor spins doesn't matter, and those big motors which run off of 3-phase. So really, it's not as big of an issue as you make it.
Sure, back in the day, AC was better because we didn't have the transistor technology to step voltages up and down with charge pumps and switch-mode regulators. But this has ALL changed...
The consumption from the switching is due to the capacitance at the gate. This is why smaller transistors are better, smaller transistors --> smaller gate --> smaller capacitance --> less switching power. Lower voltages mean the same thing, since you can use a weaker dielectric without it breaking down and thus lower the capacitance further (eg in DRAM), thereby lowering power consumption.
How about graphene? It is an extremely good conductor, and that is all, in essence making no difference at all. They still haven't figured out how to even make a bandgap with it, which means that the capacitance of whatever technology is used is essentially unknown. One aspect that might help, because of the high conductivity, is that we could make the circuit tracks thinner (eg just one layer of atoms thick), which could reduce inter-track capacitance. The actual capacitance at the gate, however, is still a complete unknown.
PSOC3 FirstTouch Starter kit costs $50 and even comes with a USB cable for programming and/or power, and a 9V battery for when you want it away from wires.
It has an Intel 8051 (remember those?), is slightly smaller than a RaspberryPi, has GPIO/I2C/SPI/UART, has an onboard FPGA to handle all of the IO as well as extra blocks for things like DSP, coms interrupts and buffers, fast hardware lookup tables, custom logic etc. Internal ADCs, internal DACs, internal comparators, internal 25mA opamps. Analogue can be routed through almost any IO. Internal voltage boost so that you can power it off of lower voltage than the VDDIO. It even comes with a cool Labview-like setup program for configuring all of the IOs and FPGA blocks. Their chips sell for a couple dollars.
The only problem Slashdot has with it is that it doesn't run Linux. And no, I'm not affiliated with them, I just like their hardware. They also make the PSOC5, which has an ARM Cortex M3, but that still isn't enough to do your GPIO programming onboard in Python.
it eludes me why there doesn't seem to be any development in this area
Probably because the A15 isn't out yet...
You missed his main point. Just like the car brought about a complete rethink compared to horses and carts, there could be some radically game changing technology introduced which makes cars redundant within cities. My personal bet is along the lines of robotic taxis...
Please look up a definition of satire and post it here so I can tell that you have.
Once you've done that please answer the following question: what aspect of Team America was not satire?
In the original script the Matrix was actually *run* on the human brains, but execs thought that would be too complicated for the masses, so they changed it to 'harness the electrical and heat energy'. Which makes no sense, as electric eels would have been a much better candidate than keeping around a possibly hostile, intelligent race.
How about doctors who are on call, and you can know from their location which one to call for emergencies. Set up a framework so that their actual location is still confidential, but given a location it is possible to discover who is closest?
There are many situations where it would be useful, but like any new technology, it can also be abused. It all comes down to ethics at the end of the day.
Or they can rainbow table for the string formed by [username + password]. Just prune off the values that don't start with the username. Usernames are typically made up of the same alphanumeric patterns as passwords, and aren't that long. It is better to use a random, large salt which has no patterns that can be exploited by future weaknesses discovered in the algorithm, and can be stored along with the hash. Adding a 500 byte random salt makes building a rainbow table just a little weeny bit harder... and if you aren't interested in storing an extra 1/2 a KB as a measure to keep your client's passwords safe, you should probably re-evaluate your priorities.
I'll believe it when I see it.
Benny and Joon?
"A mentally ill young woman finds her love in an eccentric man who models himself after Buster Keaton."
Sure, a laptop, something with a built-in screen and built-in keyboard and built-in mouse. It's almost like it was made to not require wires or something...
A Pi will need all of the above externally, so if you're going to bother with those, how about just a wireless dongle?
Only once every last router installed anywhere has 802.11N will I buy a notebook without Ethernet.
Yeah, but Intel can cut into ARM sales in the mobile market.
Every single able bodied person you know has the capacity to commit murder. That's not a good enough reason to never tell anybody where you live, or what your work involves, or any other thing which might facilitate them killing you. Instead, you wait until you know them before giving them anything which they might use against you.
Google has been around a while, and has demonstrated what I would like to call 'integrity of character'. Sure, they collect information on you, but they've worked out a way that they can make money from that without spamming you with ghastly ads or selling your information to people who will use it against you. Personally, I have no problem with the way they've conducted themselves so far, and as such I'm willing to trust them with my personal information.
Facebook, on the other hand, has been terrible. They've continuously asked for the most private of data, their privacy policy keeps changing, anything you upload belongs to them, and their default privacy settings are exceptionally lax. Despite this, and a slew of annoying ads, they still aren't making much money (through revenue, not investment), so they're going to have to start turning the screws one of these days.
I also have a Facebook profile, but I'm careful what I put up. My profile tends to be funny posts from 9gag, interesting articles I've found online and witticisms, all of which I don't believe will ever be able to be used against me or advertised with effectively.
I personally think in the middle of a desert would be the ideal situation. Preferably as far from any major fault lines as possible.
And I imagine that a meteorite strike for instance in the Gulf of Mexico would also result in millions of casualties. All the islands and coastal cities at less than 50 foot altitude would be wiped out. Never mind the chaos looters would cause in the aftermath. And that 50 foot estimate is very conservative.
Sure, an ocean strike would give you a little extra time. But how many people could you extract from Miami or NYC in 1 hour? Considering then that Florida has an average height of just 100ft...
Yeah, but the trouble is that it's just a matter of time before there won't be anywhere left to move. There will come a time when the coast is stormy, inland has tornados, the poles are just giant mudpiles of melting permafrost and the equator has malaria. How about facing the problem instead of running away?
I really don't get the anti-Google vibes. Why would people that care about privacy take a worse view of Google than of Facebook? Google has never sold the data they collected or turned over to nasty governments anything that they were not forced to. And that is post-IPO. Imagine what Facebook is going to be like privacy-wise in a few years time, once they realise that they actually need to make a profit?
You mean this one:
http://slashdot.org/~T+Murphy
National Clean Energy Standard.
From the first sentence from TFA.
You saw what happened to Japan when there was an earthquake in the ocean? Now, imagine the tsunami that would be cause by a meteorite strike.
Yeah, because that would be a logical choice for the rest of the world. You do realise that the US is much smaller than the rest of the world combined?
The laser Ti benificiation is the strongest additive manufacturing process available at the moment, and even it is very brittle because of the thermal stresses formed when it is produced. These are because as the laser melts the particles they are much hotter than the parts it is bonded with, and as they cool they shrink causing lots of stresses all throughout the material. That said, being able to make a ball inside of a socket during the manufacturing process is quite useful sometimes... not to speak of woven Ti mesh for grafts and such.
About those flamebait mods... your sig really won't help your case here.
And what you call 'leftist' is more conservative than pretty much everything except Fascist Italy and Spain and Nazi Germany, all of the 20s, 30s and 40s. Hell, even Nixon was trying to bring in universal health care, and he was considered conservative for his time.
I don't see how that's relev... *facepalm*
I see what you did there.