What's the difference between an 18:9 display and a 2:1 display?
Duh, obviously the former has 9 times more* pixels than the latter.
*(Actually, it's 8 times more, or 9 times as much, in each linear dimension, so 81 times as much in total. But this is marketing, so don't worry about the techy details.)
This. School isn't about making experts in the subjects, there's simply no time for that. It's about enough exposure to different subjects so you can (a) find your own thing, and (b) get some idea of the wide and diverse world you'll be living in.
Incidentally, I'm about to teach a small course/workshop in algorithmic art at a local school. I'm not expecting all of them to become algorithmic artists, but I hope they'll learn something about using math and code to express their ideas.
The bit change is not necessary for computation at all from information theory perspective. Theoretically, no energy needed at all for any computation. Whatever, you can do with active circuit, can be done using passive circuit (e.g. your camera lens can be used for FFT). The energy is only needed for reading information. So no matter, how complex the cryptography is, the theoretical energy required to decrypt is zero.
Yes and no. In my understanding as a physicist, bit flipping per se is free, but you need a minimum of 1/2 kT of energy to destroy information (create entropy). To avoid destroying information during computation, you basically need to store every step you do, so the operation becomes reversible (google "reversible computing" for more). This is not usually practical, so most of computing does suffer from the 1/2 kT limit per bit operation.
The lens example is valid IMHO, as Fourier transform is reversible (and there are similar integer transforms to stay bit-exact, if you're worried about floats.) But to make that practical, you need to store all that information somewhere.
Well Brian, to wrap your head around things you can relate to, better toss that MacBook you authored your article on (BSD-variant and Unix-like directory structure), stop watching Netflix (hosted on Linux and some distributed POSIX-friendly Unix-like filesystem), don't put anything on Dropbox anymore (hosted on Linux and some distributed POSIX-friendly Unix-like filesystem). Get my point? Stop whining. Just because it's over your head, doesn't mean it's not over anyone elses.
Also, try using the web with URLs like http:\\backslashdot.org\ to avoid the Unixy feel.
They've taken a crappy, underpowered chip that was trimmed to the bone to try and make something that competes with Arm, and are hacking on extras to make it sound more like a Xeon.
So it's like taking Pentium 3 and hacking on extras from Pentium 4 (the actual innovations around the core, not the GHz race) to make Pentium M, then putting several of these on a single die to make the Core series? Not a bad idea.
Or could this be Intel's trick, that they've taken a Core 2 Mobile CPU, scraped off the Penryn label, reprinted it as Atom++, and are shipping those?
I think this already happened a while ago, in a way. For instance, the original Atoms didn't have out-of-order execution, but the later ones do: https://en.wikipedia.org/wiki/... It looks a bit like the Pentium brand that lives on as the low end of Cores.
BTW, I have one of the earlier in-order Atoms running happily in a server-ish machine where GPUs do all the heavy lifting. It's perfect for the job, and I guess more Atom cores would be great for a lot of server tasks, at least given enough I/O. Ideally, something like ARM or MIPS would probably be even better, but good luck finding (a) a suitable mobo with all the PCIe slots and (b) AMD/Nvidia binary drivers.
(1) If you are near sighted (which I am), have your the prescription *slightlt* detuned, so it isn't perfect. Mine is detuned by I think around 0.25. This reduces eye strain by a HUGE amount. You won't be able to read highway signs from far away but who needs to do that any more with gps nav?
Ah, I was just posting about this below, so let me ask: why not have separate glasses for computer work?
I'm myopic, and I often read books without glasses, but the computer screen is a little too far for that. So I sometimes find it easier to use my old glasses for computing, compared to my regular glasses with a stronger correction. Around here, "computer glasses"*
refer to glasses with the optical power optimized for screen distances. It's something you can get from your employer as a health benefit if you work at a screen all day.
I also use redshift on Linux to tone down the blues (the colour component) during the night, but it's a completely orthogonal issue. Plus if you're worried about computing ruining your sleep, there's also the psychological buzz, so I'm not sure which one dominates in practice.
*(One common term is "päätelasit" meaning "terminal glasses", not necessarily because you're so old they're the last glasses you'll ever need, but because our computing term-inology is ancient and we still think in terms of terminals.)
RS232 is still pretty common with the electronics hackers.
A lot of modern embedded computers such as modems/routers have a TTL level serial port somewhere on the board. It's nice to have an extra way into the machine if its network is down, for example.
or you can make one in software.
Or software-as-hardware when programming FPGAs. Many FPGA boards have one traditional RS232 port, but it's only provided with voltage converters, so you need to program the actual signaling logic. But if you only need TTL level signals, you can skip the traditional voltages and use plain FPGA pins.
This! I'd also like a VDSL modem without any CPU+firmware, as they are soon forgotten by manufacturers, especially after vulnerabilities in ancient kernels or libraries. I guess one reason for the "router" idea is to keep clueless consumers behind NAT for better security, but it's only ironic if the routing firmware itself is compromised, and there's no way to fix it. (I'm not even starting with the GPL violations.)
Simple bridges to Ethernet seemed more common in the early days, more so with cable than DSL. Unfortunately the standards have moved on, so it's harder to find anything like that for VDSL2.
Agreed, and I'd like to go a bit further with the art/music analogy. I think mathematics is an integral (pun intended) part of our culture, like it or not. You might not like classical music, but you'll probably appreciate its influences on more modern music.
This is somewhat related to the idea of math as a tool. For instance, I'd like young people to appreciate all the scientific research that went into creating their shiny electronic toys. But there's a lot more than the utilitarian aspect. A lot of our world and culture is built on mathematical and scientific ideas, simply because they have been effective means of making progress. Today's culture is increasingly digital and computational, so we should be teaching math even more as a form of art, rather than a tool for engineers.
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What's the difference between an 18:9 display and a 2:1 display?
Duh, obviously the former has 9 times more* pixels than the latter.
*(Actually, it's 8 times more, or 9 times as much, in each linear dimension, so 81 times as much in total. But this is marketing, so don't worry about the techy details.)
Am I missing something? Why don't they just say 2:1?
Because that isn't 2674:1337 enough.
This. School isn't about making experts in the subjects, there's simply no time for that. It's about enough exposure to different subjects so you can (a) find your own thing, and (b) get some idea of the wide and diverse world you'll be living in.
Incidentally, I'm about to teach a small course/workshop in algorithmic art at a local school. I'm not expecting all of them to become algorithmic artists, but I hope they'll learn something about using math and code to express their ideas.
The bit change is not necessary for computation at all from information theory perspective. Theoretically, no energy needed at all for any computation. Whatever, you can do with active circuit, can be done using passive circuit (e.g. your camera lens can be used for FFT). The energy is only needed for reading information. So no matter, how complex the cryptography is, the theoretical energy required to decrypt is zero.
Yes and no. In my understanding as a physicist, bit flipping per se is free, but you need a minimum of 1/2 kT of energy to destroy information (create entropy). To avoid destroying information during computation, you basically need to store every step you do, so the operation becomes reversible (google "reversible computing" for more). This is not usually practical, so most of computing does suffer from the 1/2 kT limit per bit operation.
The lens example is valid IMHO, as Fourier transform is reversible (and there are similar integer transforms to stay bit-exact, if you're worried about floats.) But to make that practical, you need to store all that information somewhere.
capacitors that separate the magnetic field from the electric field.
What the actual flux?
Well Brian, to wrap your head around things you can relate to, better toss that MacBook you authored your article on (BSD-variant and Unix-like directory structure), stop watching Netflix (hosted on Linux and some distributed POSIX-friendly Unix-like filesystem), don't put anything on Dropbox anymore (hosted on Linux and some distributed POSIX-friendly Unix-like filesystem). Get my point? Stop whining. Just because it's over your head, doesn't mean it's not over anyone elses.
Also, try using the web with URLs like http:\\backslashdot.org\ to avoid the Unixy feel.
They've taken a crappy, underpowered chip that was trimmed to the bone to try and make something that competes with Arm, and are hacking on extras to make it sound more like a Xeon.
So it's like taking Pentium 3 and hacking on extras from Pentium 4 (the actual innovations around the core, not the GHz race) to make Pentium M, then putting several of these on a single die to make the Core series? Not a bad idea.
Or could this be Intel's trick, that they've taken a Core 2 Mobile CPU, scraped off the Penryn label, reprinted it as Atom++, and are shipping those?
I think this already happened a while ago, in a way. For instance, the original Atoms didn't have out-of-order execution, but the later ones do: https://en.wikipedia.org/wiki/... It looks a bit like the Pentium brand that lives on as the low end of Cores.
BTW, I have one of the earlier in-order Atoms running happily in a server-ish machine where GPUs do all the heavy lifting. It's perfect for the job, and I guess more Atom cores would be great for a lot of server tasks, at least given enough I/O. Ideally, something like ARM or MIPS would probably be even better, but good luck finding (a) a suitable mobo with all the PCIe slots and (b) AMD/Nvidia binary drivers.
You want one core per NIC for these to make the best use of AESNI plus one or two more for management tasks.
While we're talking about massive parallelity, I want Knights with NI.
(1) If you are near sighted (which I am), have your the prescription *slightlt* detuned, so it isn't perfect. Mine is detuned by I think around 0.25. This reduces eye strain by a HUGE amount. You won't be able to read highway signs from far away but who needs to do that any more with gps nav?
Ah, I was just posting about this below, so let me ask: why not have separate glasses for computer work?
I'm myopic, and I often read books without glasses, but the computer screen is a little too far for that. So I sometimes find it easier to use my old glasses for computing, compared to my regular glasses with a stronger correction. Around here, "computer glasses"* refer to glasses with the optical power optimized for screen distances. It's something you can get from your employer as a health benefit if you work at a screen all day.
I also use redshift on Linux to tone down the blues (the colour component) during the night, but it's a completely orthogonal issue. Plus if you're worried about computing ruining your sleep, there's also the psychological buzz, so I'm not sure which one dominates in practice.
*(One common term is "päätelasit" meaning "terminal glasses", not necessarily because you're so old they're the last glasses you'll ever need, but because our computing term-inology is ancient and we still think in terms of terminals.)
Well, "proceeding" vs. "preceding" is really a 2-character bug. Although I wouldn't know for sure as I'm not a native English speaker.
for all the jobs it replaces?
Maybe, but it's hugely offset by the number of tech support jobs necessary to maintain Bill's software.
In fact, I'm thinking of making robots that break windows. Think of all the new jobs they will create!
I came here to lead, not to read!
Come on, we're talking about a female geek/scientist, that should suffice for the usual Slashdotter.
That's a pretty graphic description
no news to anyone in the field.
I see what you did there. Also, thanks to Slashdot's no editing policy, we now have a record of pun field strength for future paleocomedians.
RS232 is still pretty common with the electronics hackers.
A lot of modern embedded computers such as modems/routers have a TTL level serial port somewhere on the board. It's nice to have an extra way into the machine if its network is down, for example.
or you can make one in software.
Or software-as-hardware when programming FPGAs. Many FPGA boards have one traditional RS232 port, but it's only provided with voltage converters, so you need to program the actual signaling logic. But if you only need TTL level signals, you can skip the traditional voltages and use plain FPGA pins.
https://en.wikipedia.org/wiki/... -- waves on the surface of water whose dynamics is dominated by gravity. See https://en.wikipedia.org/wiki/... for smaller ripples dominated by surface tension.
https://en.wikipedia.org/wiki/... -- what the fucking article is about
you can't ask why.
Why not?
I'm still waiting for my philotic communication link, also known as Phi-Fi.
Every time you use argumentum ad hitlerum, God wins!
Why can't kids learn Spanish AND Python?
I didn't expect the Inquisition.
This! I'd also like a VDSL modem without any CPU+firmware, as they are soon forgotten by manufacturers, especially after vulnerabilities in ancient kernels or libraries. I guess one reason for the "router" idea is to keep clueless consumers behind NAT for better security, but it's only ironic if the routing firmware itself is compromised, and there's no way to fix it. (I'm not even starting with the GPL violations.)
Simple bridges to Ethernet seemed more common in the early days, more so with cable than DSL. Unfortunately the standards have moved on, so it's harder to find anything like that for VDSL2.
Agreed, and I'd like to go a bit further with the art/music analogy. I think mathematics is an integral (pun intended) part of our culture, like it or not. You might not like classical music, but you'll probably appreciate its influences on more modern music.
This is somewhat related to the idea of math as a tool. For instance, I'd like young people to appreciate all the scientific research that went into creating their shiny electronic toys. But there's a lot more than the utilitarian aspect. A lot of our world and culture is built on mathematical and scientific ideas, simply because they have been effective means of making progress. Today's culture is increasingly digital and computational, so we should be teaching math even more as a form of art, rather than a tool for engineers.