MicroUSB was designed for 10,000 cycles, the same as Type-C. You might be thinking of MiniUSB, but even that was for 5000 cycles, not 500. Standard A/B was designed for 1500 cycles.
That's ignoring Vernier Acuity, which is a very important effect on displays where the pixels form parallel lines, i.e. pretty much every modern electronic display. It gets down to 0.13 arc minutes, which is why there are several replies pointing out that your theory doesn't match reality, even for people with worse than average vision.
And this figure of 2190dpi? That's 3 significant figures, computed from something that was given to only one significant figure (0.4 arc minutes). You can't do that, and it should be a huge red flag that the source article should not be taken seriously.
Firefox supports 60fps if the video is encoded in WebM (VP9) which only happens on Youtube if it has enough views
Google could have added support in the Flash player
I get 60fps on test videos with single-digit views, using RHEL 6.4, Firefox 17.0.7 ESR and Flash 11,2,202,327.
Although the video options only present e.g. 720p rather than 720p60, selecting 720p gives 60fps. Selecting 480p gives 30fps. The same video encoded at 30fps before upload and viewed in 720p shows the difference very clearly. I suspect it's something to do with the old version of Flash.
For reference, I also tested with Windows 7, Firefox 33.0.2, Flash 15.0.0.152, and 720p and only get 30fps.
Some of it is learned through practice, but all of it isn't.
The meaning you intended to convey was probably "not all of it is". Otherwise, the literal meaning contradicts the first part of the sentence. What came up with that phrasing - your conscious or unconscious mind?
I've noticed that the faster I write, the more likely it is my writing will contain homophones. I presume that the faster I write, the more my unconscious mind gets used for the task, and it places more emphasis on sound. Or there's a sound buffer and a letters/word buffer working in parallel, with the former usually taking precedence, but at speed it gets filled too quickly, so the fallback is to the sound buffer.
Hmm, I think you have a few things wrong and/or misleadingly stated.
In the early 1980s Acorn evaluated CPUs for their next-generation product. 80286 was released in 1982 February and was readily available on the market so there was no need to get Intel's cooperation to evaluate it. But, Acorn did want to license the 80286 core and make changes to it, which Intel rejected. All the evaulated CPUs were deemed inadequate, so in 1983 October Acorn started development of Acorn RISC Machine.
The goal of the ARM architecture was high performance. (On production release it out-performed the still-current 80286.) The device was simple because of the limited design resources, and therefore low-power, but for it to be quite as low power as it turned out to be was an entirely unexpected accident.
Apple officially became part of the the ARM project when Acorn spun off ARM Ltd in 1990 November, by which time the 80486 was on the market. Apple's interest was to continue development of low-power CPUs for their Newton handheld, for which the 80x86 line was unsuitable.
How often do you need to drive from Dundee, Scotland to Poole, England?
646 km seems to be about as far as one can drive in the UK --- that's just 400 miles
Dundee to Poole is an 800km drive. Dundee is a less likely endpoint than Aberdeen, another 100km up the road. Thurso to Penzance is a 1300km drive. Yes, the US is a lot bigger than the UK, but don't just make stuff up. Then there's the rest of the EU to consider...
30" 2560x1600 monitors by HP and LG have been mentioned, and Dell also do one (U3011) that was my preference (lots of inputs - LG's doesn't even have DisplayPort input). You could also consider partnering it with some 20" 1600x1200 monitors in portrait mode as the dpi is about the same, e.g http://magnusknight.com/gfx/mixdComputers2011.jpg
Annoyingly, 1600x1200 monitors tend to be more expensive than 1920x1200, but it's worth it for the aesthetics imo. I happened to find a couple of refurbished (i.e. nearly new) Dell 2007FPbs at half the price that Dell list them at. Being a SIPS panel, they work pretty well in portrait mode, unlike TN panels which can have pretty bad colour shifting.
Its also worth noting that ARM has never been about performance
Performance was exactly the reason the ARM architecture was created in the first place. Acorn's engineers determined that the performance of existing and announced architectures (from Intel, Motorola, etc.) was insufficient, so they needed to create a new one.
e.g. http://www.ot1.com/arm/armchap1.html
No, light travels 5cm in one 6 GHz clock cycle, in a vacuum. Speed of light limitations have been a consideration for years. The Cray1 was designed in the early 70s and its physical design allowed for the propagation speed of electricity in copper. It only ran at 80MHz. It's not just about cycle time - what's the duration of your edges? What other latencies are there in the electronics? In 2004, IBM's POWER5 MCM was 9.5cm wide and the CPUs ran at ~2GHz. Not sure what speed the interconnect ran at.
I keep hearing this, but it's not true; RISC OS had protected memory. Try writing to another app's memory from user mode, or writing to VIDC registers from user mode. But some important areas weren't protected, e.g. the ARM vector table.
> Before you ask, I am a professional (it's my job) programmer. I'd love to be an engineer.
> I'd love to work somewhere where those kind of standards were applied. I'd get a CS degree
> (mine is in Physics), but those programmers I've worked with who have CS degrees don't seem
> much more engineer-like in their application than those without.
In principle Computer Science courses are meant to turn out scientists, not engineers. Maybe you'd be better getting a Software Engineering degree. Have you worked with programmers with Software Engineering degrees? Are they more engineer-like?
> It seems they've stopped looking at them as Intel cpu performance equivalence numbers.
Just a nitpick, but this was never - officially at least - the case. The Performance Rating is scaled against a Thunderbird (B I think) at 1GHz (which was nominally rated 1000). Still, nice post.
That comparison doesn't really make sense, because the options you cite are available on landline phones - and they're all free with BT (since you mention them). You just have to enable the services and buy a phone that supports them - just like for a mobile phone.
Turn the phone off. Yep, just unplug, no problem.
Set to silent and ignore. Yep, just set the phone to no ringer - most phones have this. Call-time Caller ID is available free from BT (type "caller id" BT into google), and post-call Caller ID is available either from your phone or on 1471, also free.
Set to silent and evaluate the call when it rings. Yep, you still get a visible indication that there's a call, you have Caller ID, and the BT answering service (1571) is free.
Set the phone to ring. Yep, this is standard behaviour.
OK, now to compare the features of my landline to a non-CLI enabled, non voicemail enabled, non-ringer adjustable mobile phone...
Does it not spin up? Drive bearings seem like a pretty common point of failure - Try sticking it in the freezer overnight (no joke!), and see if you can get it to spin up one last time, just long enough to copy everything important off it (And make damned sure you know what you want, and in what order you value it,, because you'll only get 15 minutes tops out of the drive this way).
If the problem is stiction, I think you can probably expect a lot more than 15 minutes out of it. Once you get it spinning again, it should be fine at least until you next try to spin it up.
I had a hard drive refuse to spin up recently, and I tried all sorts of tricks to get it going again, including putting it in the freezer overnight. Eventually I had nothing else left to try, so I got out a screwdriver, and removed all the screws. Umm, except one (the one over the axis of the spindle, under a sticker), but I didn't know that until later.
I wound up just levering the case open, breaking it in the process, and spanging my screwdriver off of one of the platters. Platters make a really nice ringing sound.
I turned the platters by hand, then hooked it up to a PC, still with the case off, no anti-dust precautions, and booted up from another drive.
Then I copied all the files over to the other disk. Watching a hard drive arm in action is pretty cool. You should try it. With a dead HD.
In the end, I only lost three files off of the whole drive. The platters were colourless, so my girlfriend has them now - she uses them as mirrors. They are really top quality.
And the various magnets are now on my fridge. Get the magnets for the arm, they are really powerful. But be careful, you can easily nip some skin off with them.
electrical retina stimulation may yield a
spatial resolution of 1-5 degrees visual angle and a temporal resolution of about 20 ms
[..]
20 ms is about 50 Hz, or 50 fps. Under MAXIMUM stimulation.
Are you also going to conclude from this study that human eyes cannot resolve spatial details of under 1 degree visual angle? It is clearly not the case. This study is not measuring what you think it is measuring.
Also, try this experiment: repeatedly move your mouse quickly in a circular path, and look at the pointer. You will see a series of sharp, static images of the pointer, even at 100Hz and beyond. Even past the neural switching speed of about 1000Hz, you would still be able to see this effect.
You might like to experiment with the same effect in the real world. You will need a strobe light.
Perception of movement is not the be all and end all. Continuity is also important, and that's why higher frame rates are better even after the threshold for movement perception has been reached. (There are other reasons too, but that's another post.)
Of course there is the occasional times that a jury gets it wrong but usually that is because of missing evidence or evidence that wasn't allowed to be presented to them.
Unfortunately, I don't think that's true. I've sat on a jury and the experience caused me to lose all faith in the jury system as it stands.
The truth is, the majority of jurors have little training in or facility with critical thinking, and have difficulty determining what constitutes reasonable doubt, or of taking into account the credibility of those involved in the case. I recall in particular an incident where a witness was shown to have lied under oath, and yet two jurors accepted all the witness's other statements without question.
A significant proportion of jurors are of below average intelligence. And many display prejudices about all sorts of quirks of the accused or accusers, which have nothing to do with determining their guilt or innocence.
Next time you get annoyed at some numbskull's idiocy, ask yourself, if you were falsely accused of a crime, would you want that person on the jury? Take a stroll around your neighbourhood, go to some stores, watch TV. Look at the people. Would you really trust them to reliably assess the evidence in a case and unerringly determine your innocence? Those people, or people much like them could very well be on the jury.
Richard Dawkins wrote a piece on the subject of trial by jury that is well worth reading.
Refills of HP's new color Vivera ink cartridges will sell for $9.99, while older color ink cartridges can run $30 or more.
Canon BCI-6BK Black Ink Tank $9.99.
Yep, that's why I got a Canon printer. I get my cartridges for a lot less than that even:
£1.87 (about $3.32) for colour
£1.77 (about $3.14) for black
OK, those aren't manufactured by Canon, but they work great for me. And a factor of ten in price difference compared to HP's offerings is hard to ignore.
For lists of N items with a *constant* number of out-of-order items, both insertion sort and bubble sort are O(N), not O(N^2). IIRC, the runtime of bubble sort is typically better in this situation.
Slashdot Mirror
MicroUSB was designed for 10,000 cycles, the same as Type-C. You might be thinking of MiniUSB, but even that was for 5000 cycles, not 500. Standard A/B was designed for 1500 cycles.
That's ignoring Vernier Acuity, which is a very important effect on displays where the pixels form parallel lines, i.e. pretty much every modern electronic display. It gets down to 0.13 arc minutes, which is why there are several replies pointing out that your theory doesn't match reality, even for people with worse than average vision.
And this figure of 2190dpi? That's 3 significant figures, computed from something that was given to only one significant figure (0.4 arc minutes). You can't do that, and it should be a huge red flag that the source article should not be taken seriously.
Firefox supports 60fps if the video is encoded in WebM (VP9) which only happens on Youtube if it has enough views
Google could have added support in the Flash player
I get 60fps on test videos with single-digit views, using RHEL 6.4, Firefox 17.0.7 ESR and Flash 11,2,202,327.
Although the video options only present e.g. 720p rather than 720p60, selecting 720p gives 60fps. Selecting 480p gives 30fps. The same video encoded at 30fps before upload and viewed in 720p shows the difference very clearly. I suspect it's something to do with the old version of Flash.
For reference, I also tested with Windows 7, Firefox 33.0.2, Flash 15.0.0.152, and 720p and only get 30fps.
Some of it is learned through practice, but all of it isn't.
The meaning you intended to convey was probably "not all of it is". Otherwise, the literal meaning contradicts the first part of the sentence. What came up with that phrasing - your conscious or unconscious mind?
I've noticed that the faster I write, the more likely it is my writing will contain homophones. I presume that the faster I write, the more my unconscious mind gets used for the task, and it places more emphasis on sound. Or there's a sound buffer and a letters/word buffer working in parallel, with the former usually taking precedence, but at speed it gets filled too quickly, so the fallback is to the sound buffer.
Hmm, I think you have a few things wrong and/or misleadingly stated.
In the early 1980s Acorn evaluated CPUs for their next-generation product. 80286 was released in 1982 February and was readily available on the market so there was no need to get Intel's cooperation to evaluate it. But, Acorn did want to license the 80286 core and make changes to it, which Intel rejected. All the evaulated CPUs were deemed inadequate, so in 1983 October Acorn started development of Acorn RISC Machine.
The goal of the ARM architecture was high performance. (On production release it out-performed the still-current 80286.) The device was simple because of the limited design resources, and therefore low-power, but for it to be quite as low power as it turned out to be was an entirely unexpected accident.
Apple officially became part of the the ARM project when Acorn spun off ARM Ltd in 1990 November, by which time the 80486 was on the market. Apple's interest was to continue development of low-power CPUs for their Newton handheld, for which the 80x86 line was unsuitable.
How often do you need to drive from Dundee, Scotland to Poole, England?
646 km seems to be about as far as one can drive in the UK --- that's just 400 miles
Dundee to Poole is an 800km drive. Dundee is a less likely endpoint than Aberdeen, another 100km up the road. Thurso to Penzance is a 1300km drive. Yes, the US is a lot bigger than the UK, but don't just make stuff up. Then there's the rest of the EU to consider...
30" 2560x1600 monitors by HP and LG have been mentioned, and Dell also do one (U3011) that was my preference (lots of inputs - LG's doesn't even have DisplayPort input). You could also consider partnering it with some 20" 1600x1200 monitors in portrait mode as the dpi is about the same, e.g http://magnusknight.com/gfx/mixdComputers2011.jpg
Annoyingly, 1600x1200 monitors tend to be more expensive than 1920x1200, but it's worth it for the aesthetics imo. I happened to find a couple of refurbished (i.e. nearly new) Dell 2007FPbs at half the price that Dell list them at. Being a SIPS panel, they work pretty well in portrait mode, unlike TN panels which can have pretty bad colour shifting.
Its also worth noting that ARM has never been about performance
Performance was exactly the reason the ARM architecture was created in the first place. Acorn's engineers determined that the performance of existing and announced architectures (from Intel, Motorola, etc.) was insufficient, so they needed to create a new one. e.g. http://www.ot1.com/arm/armchap1.html
No, light travels 5cm in one 6 GHz clock cycle, in a vacuum. Speed of light limitations have been a consideration for years. The Cray1 was designed in the early 70s and its physical design allowed for the propagation speed of electricity in copper. It only ran at 80MHz. It's not just about cycle time - what's the duration of your edges? What other latencies are there in the electronics? In 2004, IBM's POWER5 MCM was 9.5cm wide and the CPUs ran at ~2GHz. Not sure what speed the interconnect ran at.
no protected memory
I keep hearing this, but it's not true; RISC OS had protected memory. Try writing to another app's memory from user mode, or writing to VIDC registers from user mode. But some important areas weren't protected, e.g. the ARM vector table.
I'm in the UK and pay 13.1p/kWh flat rate, including tax. Either StoneyMahoney's figures are a "London-only" thing or he should switch supplier.
> I'd love to work somewhere where those kind of standards were applied. I'd get a CS degree
> (mine is in Physics), but those programmers I've worked with who have CS degrees don't seem
> much more engineer-like in their application than those without.
In principle Computer Science courses are meant to turn out scientists, not engineers. Maybe you'd be better getting a Software Engineering degree. Have you worked with programmers with Software Engineering degrees? Are they more engineer-like?
Just a nitpick, but this was never - officially at least - the case. The Performance Rating is scaled against a Thunderbird (B I think) at 1GHz (which was nominally rated 1000). Still, nice post.
- Turn the phone off. Yep, just unplug, no problem.
- Set to silent and ignore. Yep, just set the phone to no ringer - most phones have this. Call-time Caller ID is available free from BT (type "caller id" BT into google), and post-call Caller ID is available either from your phone or on 1471, also free.
- Set to silent and evaluate the call when it rings. Yep, you still get a visible indication that there's a call, you have Caller ID, and the BT answering service (1571) is free.
- Set the phone to ring. Yep, this is standard behaviour.
OK, now to compare the features of my landline to a non-CLI enabled, non voicemail enabled, non-ringer adjustable mobile phone...I had a hard drive refuse to spin up recently, and I tried all sorts of tricks to get it going again, including putting it in the freezer overnight. Eventually I had nothing else left to try, so I got out a screwdriver, and removed all the screws. Umm, except one (the one over the axis of the spindle, under a sticker), but I didn't know that until later.
I wound up just levering the case open, breaking it in the process, and spanging my screwdriver off of one of the platters. Platters make a really nice ringing sound.
I turned the platters by hand, then hooked it up to a PC, still with the case off, no anti-dust precautions, and booted up from another drive.
Then I copied all the files over to the other disk. Watching a hard drive arm in action is pretty cool. You should try it. With a dead HD.
In the end, I only lost three files off of the whole drive. The platters were colourless, so my girlfriend has them now - she uses them as mirrors. They are really top quality.
And the various magnets are now on my fridge. Get the magnets for the arm, they are really powerful. But be careful, you can easily nip some skin off with them.
Also, try this experiment: repeatedly move your mouse quickly in a circular path, and look at the pointer. You will see a series of sharp, static images of the pointer, even at 100Hz and beyond. Even past the neural switching speed of about 1000Hz, you would still be able to see this effect.
You might like to experiment with the same effect in the real world. You will need a strobe light.
Perception of movement is not the be all and end all. Continuity is also important, and that's why higher frame rates are better even after the threshold for movement perception has been reached. (There are other reasons too, but that's another post.)
The truth is, the majority of jurors have little training in or facility with critical thinking, and have difficulty determining what constitutes reasonable doubt, or of taking into account the credibility of those involved in the case. I recall in particular an incident where a witness was shown to have lied under oath, and yet two jurors accepted all the witness's other statements without question.
A significant proportion of jurors are of below average intelligence. And many display prejudices about all sorts of quirks of the accused or accusers, which have nothing to do with determining their guilt or innocence.
Next time you get annoyed at some numbskull's idiocy, ask yourself, if you were falsely accused of a crime, would you want that person on the jury? Take a stroll around your neighbourhood, go to some stores, watch TV. Look at the people. Would you really trust them to reliably assess the evidence in a case and unerringly determine your innocence? Those people, or people much like them could very well be on the jury.
Richard Dawkins wrote a piece on the subject of trial by jury that is well worth reading.
£1.87 (about $3.32) for colour
£1.77 (about $3.14) for black
OK, those aren't manufactured by Canon, but they work great for me. And a factor of ten in price difference compared to HP's offerings is hard to ignore.
> NVIDIA 6600 does not come in "PCI" form factor. None of video cards made in last handful of years do.
That's not true. nVidia 6200 is available in PCI form factor, and so are ATI 9200 variants. Check out ebuyer.com.
Descent 3 on Windows did; I presume Linux Descent 3 also does.
For lists of N items with a *constant* number of out-of-order items, both insertion sort and bubble sort are O(N), not O(N^2). IIRC, the runtime of bubble sort is typically better in this situation.