The unit for specific resistance is ohm m, not ohm/m. For conduction paths that have more complicated shapes than wires, it's difficult to tell the resistance without extended calculations, but generally, smaller systems will have higher, not lower, resistances. Moreover, the metal/water interfaces don't behave like simple resistances due to the electrochemical processes there.
of=/dev/stdout makes dd dump its output to standard output. It's easier than looking up in the man page what option you need for dd to do that. (now I did: next time I'll leave out the of= entirely:-) ).
rsync rather than scp to avoid CPU load due to compression/encryption
Unless you're using a customized ssh server and client with a "null" cipher, rsync will run over an encrypted ssh connection. If you want to see raw network throughput, you should use netcat:
For one thing, you can send photos (downsized to For another thing, you get lots of emojis (Unicode smileys and other pictograms) that will look the same between the sender and the recipient (unlike how native Android would render an emoji sent from an iphone).
Before you accuse me of being a 16-year old with ADD: I'm in my fourties. Even my mother-in-law uses these features.
The security model on Windows Phone is actually more secure than Android. You can't write an app that will stay running in the background "forever" and your apps can't cross over to mess with other apps.
Not that I'm an Android developer, nor do I have any experience with WP, but I had the impression that Android apps can only run in the background as a service, and any app that wants to do so uninterruptedly will need to announce itself in the notification bar. So, they can run in the background forever, but not without you noticing. I don't see why this aspect makes Android less secure than WP.
And I have no idea what you mean by implying that Android apps can "cross over to mess with other apps". Android apps can't see each other's data.
"He was one of the five percent of males with the red/green color blindness, as was his brother Bill. They couldn't tell the difference between red and green at all."
What you describe sounds like deuteranopia: completely absent cones for green. That's much more rare: 1.2% of males according to Wikipedia. Most male red/green color blindness is of a type where the red or green cones have a modified spectrum, which mostly leads to problems with distinguishing less saturated colors. Among my coworkers who complain about color coding in plots, none of them have such a severe color blindness as what you describe.
"the [washing] machine is now 90% computer and most faults need to be addressed by replacing logic boards; which is not something that can be done cheaply."
Not cheaply, unlike, for example, the mechanical dial 20 years ago that contained all washing programs in electrical switches and that would break if you or a toddler turned it counterclockwise?
"My many European friends frequently express dismay at Americans' weird urge to hide their salary. In much of Europe, everybody knows."
Interesting. I had the impression that it was the other way around, but maybe that's because I was in an academic surrounding. In any case, my impression is that Americans like to show off their wealth to at least give the appearance of a high income.
Here in the Netherlands people rarely talk about income. I don't know it for most of my friends and as for my coworkers, even the job titles (which give the ballpark salary) are not public, although some put it in their linkedin profile.
You grew up on a diary farm. But generally, the fields where they grow wheat and corn are not close to the places with cattle in stables. I've wondered about what they do with the giant rolls of straw that you see on the fields in autumn in places where there is no cattle (experience in Europe). It may be economic to truck them to livestock farms, although I suspect that some of it is burnt in coal power plants to greenwash electricity. But certainly it's not economic to ship it back once it's soaked with manure. There would be more straw-manure-filled trucks on the road and machines in the field handling it.
Unfortunately, shops don't advertise the maximum current capability of the USB cables. I've had A brands and B brands and it's a hit or miss. The original Nexus 5 and Nexus 7 cables are 24 AWG, about a meter length and fairly flexible. But you can't buy them separately.
And as for Conrad: I have a 5000 mAh power bank from Conrad. It is capable of delivering 1.0 A at 4.8 V. Consequence: apart from my 5 ohm test resistor, nothing will actually draw more than 500 mA. The only good thing about it is that it can charge and discharge at the same time.
I misinterpreted your statement. No reason to start throwing accusations at me. If you want to know: I thought you meant "not something you can buy for $5 like a cat toy".
1A isn't an actual USB standard (neither 2.1A for that matters). Most charger advertise this higher current support with special tricks
It's called USB Battery Charging Specification and it's not a special trick. I admit that the roll-up cables that I have are all from (various, euro-equivalent) dollar stores, but I did actually measure the current passing through. What I see is that phones/tablet built-in chargers have a series of current settings, e.g. 300, 600, 900, 1200 mA and that they will take the highest one that does not cause the voltage to drop too much.
There is another issue that makes comparisons hard: different phones have different cut-off points for the safe voltage. Combined with the fact that wall warts and power banks have output voltages varying between 4.8 and 5.2 V it's a lot of hit-or-miss. The best way to ensure that the cable resistance is not a limiting factor is to use AWG 24 (0.2 mm2) wires, but those are rather thick for a roll-up cable.
I'm not sure about you, but I clearly don't have the habit of carrying around a spare metal tea-spoon in my pocket. (Must be a British thing...:-P )
I am neither a spoon carrier nor British. But I found that in British hotels and B&Bs, a tea spoon is usually available.:-)
When I travel, I usually have many USB-chargeable things around: my and my SO's phones, tablet, several power banks. I'd prefer to have one data-capable USB cable and not so many USB-A connectors for charging.
"If you think that the lasers being used to do this are $5 cat toys,"
Aliexpress has battery-powered hand-held green laser "pointers" up to 500 mW for prices under $10. For $5 you get something that isn't a cat toy but that can surely severely dazzle a pilot.
Numbers for context: if more than 5 mW enters the eye, there is a good chance for damage before you can blink. A car using the high beams (100,000 cd) from 100 m distance has about 1 micro-W of visible light entering your eye. At 500 m distance, the 500-mW laser has a spot size of 20 cm (8 in) with up to 0.6 mW in the eye . There is little risk for eye injury, but imagine getting dazzled by a few hundred cars that are pointing the high beams at you. Even if it's not a direct hit on the eye, it's like someone switches on a 200-lumen light on in the cockpit while the pilot is trying to see the landing strip.
I've never seen a roll-up cable that can actually handle 1 A current. The wires are too thin; the phone will detect a voltage drop when it draws current and limit the current. It's more like 300-500 mA.
Samsung makes compact phone chargers for their low-end smartphones that do 700 mA and include a flexible wire with micro-USB on one end. Much less bulky than a separate USB cable.
As for UK plugs: stick the back of a teaspoon or similar object into the third, ground, hole, to open up the other two. Then, a euro plug will fit just fine. It probably violates electrical codes to do so, but whatever. The charger won't care whether the outlet is fused at 16 A (rest of Europe) or 32 A (UK).
I miss that too. But I think the problem is that QA gets much harder with lots of advanced options. You have test against all possible combinations of options or the users will whine.
Casus: I just bought a fancy photo camera with a 360 page manual describing all the settings and features. It didn't take long before I had activated a feature that disabled the autofocus mode selection. Took me a full hour of trying to figure out that enabling digital zoom does not go along with focus-to-faces... That kind of UI issues disappear when you simply dont offer so many settings.
Follow-up: Lenovo made this feature (battery charging not up to 100%) a hidden feature in their drivers and settings panel for Windows 8; it's only accessible by manual registry tweaking. Fortunately, setting the a new maximum charge state to 85% is persistent across reboots to Linux.
My corporate laptop is an HP, not a Thinkpad; . My private laptop is a Thinkpad X131e and it doesn't have this feature in BIOS/UEFI. I use Linux exclusively; it seems that this feature requires one to run a Windows program; there doesn't seem to be a Linux equivalent. I'll boot Windows some time and see if a change of battery-charging settings will carry over after a reboot into Linux, but I doubt it.
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The unit for specific resistance is ohm m, not ohm/m. For conduction paths that have more complicated shapes than wires, it's difficult to tell the resistance without extended calculations, but generally, smaller systems will have higher, not lower, resistances. Moreover, the metal/water interfaces don't behave like simple resistances due to the electrochemical processes there.
of=/dev/stdout makes dd dump its output to standard output. It's easier than looking up in the man page what option you need for dd to do that. (now I did: next time I'll leave out the of= entirely :-) ).
rsync rather than scp to avoid CPU load due to compression/encryption
Unless you're using a customized ssh server and client with a "null" cipher, rsync will run over an encrypted ssh connection. If you want to see raw network throughput, you should use netcat:
This app makes no sense to use for anyone I know.
For one thing, you can send photos (downsized to For another thing, you get lots of emojis (Unicode smileys and other pictograms) that will look the same between the sender and the recipient (unlike how native Android would render an emoji sent from an iphone).
Before you accuse me of being a 16-year old with ADD: I'm in my fourties. Even my mother-in-law uses these features.
Not that I'm an Android developer, nor do I have any experience with WP, but I had the impression that Android apps can only run in the background as a service, and any app that wants to do so uninterruptedly will need to announce itself in the notification bar. So, they can run in the background forever, but not without you noticing. I don't see why this aspect makes Android less secure than WP.
And I have no idea what you mean by implying that Android apps can "cross over to mess with other apps". Android apps can't see each other's data.
"He was one of the five percent of males with the red/green color blindness, as was his brother Bill. They couldn't tell the difference between red and green at all."
What you describe sounds like deuteranopia: completely absent cones for green. That's much more rare: 1.2% of males according to Wikipedia. Most male red/green color blindness is of a type where the red or green cones have a modified spectrum, which mostly leads to problems with distinguishing less saturated colors. Among my coworkers who complain about color coding in plots, none of them have such a severe color blindness as what you describe.
They use the same machines for straw and hay, but don't worry: I can tell the difference.
"the [washing] machine is now 90% computer and most faults need to be addressed by replacing logic boards; which is not something that can be done cheaply."
Not cheaply, unlike, for example, the mechanical dial 20 years ago that contained all washing programs in electrical switches and that would break if you or a toddler turned it counterclockwise?
"My many European friends frequently express dismay at Americans' weird urge to hide their salary. In much of Europe, everybody knows." Interesting. I had the impression that it was the other way around, but maybe that's because I was in an academic surrounding. In any case, my impression is that Americans like to show off their wealth to at least give the appearance of a high income. Here in the Netherlands people rarely talk about income. I don't know it for most of my friends and as for my coworkers, even the job titles (which give the ballpark salary) are not public, although some put it in their linkedin profile.
You grew up on a diary farm. But generally, the fields where they grow wheat and corn are not close to the places with cattle in stables. I've wondered about what they do with the giant rolls of straw that you see on the fields in autumn in places where there is no cattle (experience in Europe). It may be economic to truck them to livestock farms, although I suspect that some of it is burnt in coal power plants to greenwash electricity. But certainly it's not economic to ship it back once it's soaked with manure. There would be more straw-manure-filled trucks on the road and machines in the field handling it.
FLoating-point Operations Per Second. It makes no sense to speak of one FLOP, two FLOPs, as the S is not for plural.
Unfortunately, shops don't advertise the maximum current capability of the USB cables. I've had A brands and B brands and it's a hit or miss. The original Nexus 5 and Nexus 7 cables are 24 AWG, about a meter length and fairly flexible. But you can't buy them separately. And as for Conrad: I have a 5000 mAh power bank from Conrad. It is capable of delivering 1.0 A at 4.8 V. Consequence: apart from my 5 ohm test resistor, nothing will actually draw more than 500 mA. The only good thing about it is that it can charge and discharge at the same time.
I misinterpreted your statement. No reason to start throwing accusations at me. If you want to know: I thought you meant "not something you can buy for $5 like a cat toy".
It's called USB Battery Charging Specification and it's not a special trick. I admit that the roll-up cables that I have are all from (various, euro-equivalent) dollar stores, but I did actually measure the current passing through. What I see is that phones/tablet built-in chargers have a series of current settings, e.g. 300, 600, 900, 1200 mA and that they will take the highest one that does not cause the voltage to drop too much.
There is another issue that makes comparisons hard: different phones have different cut-off points for the safe voltage. Combined with the fact that wall warts and power banks have output voltages varying between 4.8 and 5.2 V it's a lot of hit-or-miss. The best way to ensure that the cable resistance is not a limiting factor is to use AWG 24 (0.2 mm2) wires, but those are rather thick for a roll-up cable.
I am neither a spoon carrier nor British. But I found that in British hotels and B&Bs, a tea spoon is usually available. :-)
When I travel, I usually have many USB-chargeable things around: my and my SO's phones, tablet, several power banks. I'd prefer to have one data-capable USB cable and not so many USB-A connectors for charging.
"equip planes with a return-fire laser?"
They could start with mounting retroreflectors on the cockpit windows.
http://www.edmundoptics.com/op...
Bad side effect: it will help the bad guy to aim better.
"If you think that the lasers being used to do this are $5 cat toys,"
Aliexpress has battery-powered hand-held green laser "pointers" up to 500 mW for prices under $10. For $5 you get something that isn't a cat toy but that can surely severely dazzle a pilot.
http://m.aliexpress.com/w/whol...
Numbers for context: if more than 5 mW enters the eye, there is a good chance for damage before you can blink. A car using the high beams (100,000 cd) from 100 m distance has about 1 micro-W of visible light entering your eye. At 500 m distance, the 500-mW laser has a spot size of 20 cm (8 in) with up to 0.6 mW in the eye . There is little risk for eye injury, but imagine getting dazzled by a few hundred cars that are pointing the high beams at you. Even if it's not a direct hit on the eye, it's like someone switches on a 200-lumen light on in the cockpit while the pilot is trying to see the landing strip.
Do you have a link about this story? I Googled a bit, but I get nothing that sounds like a major scandal.
I've never seen a roll-up cable that can actually handle 1 A current. The wires are too thin; the phone will detect a voltage drop when it draws current and limit the current. It's more like 300-500 mA.
Samsung makes compact phone chargers for their low-end smartphones that do 700 mA and include a flexible wire with micro-USB on one end. Much less bulky than a separate USB cable.
As for UK plugs: stick the back of a teaspoon or similar object into the third, ground, hole, to open up the other two. Then, a euro plug will fit just fine. It probably violates electrical codes to do so, but whatever. The charger won't care whether the outlet is fused at 16 A (rest of Europe) or 32 A (UK).
I miss that too. But I think the problem is that QA gets much harder with lots of advanced options. You have test against all possible combinations of options or the users will whine.
Casus: I just bought a fancy photo camera with a 360 page manual describing all the settings and features. It didn't take long before I had activated a feature that disabled the autofocus mode selection. Took me a full hour of trying to figure out that enabling digital zoom does not go along with focus-to-faces... That kind of UI issues disappear when you simply dont offer so many settings.
"point me towards some quality malware to infect my Linux box with, I'd be grateful."
Set a password 'root' for the root user, let sshd listen to the internet from the default port, and wait a few days.
Does Xposed stuff work on Android 5/Lollipop? At least when I upgraded from 4.4 to 5.1, most of the Xposed plugins that I had stopped working.
Follow-up: Lenovo made this feature (battery charging not up to 100%) a hidden feature in their drivers and settings panel for Windows 8; it's only accessible by manual registry tweaking. Fortunately, setting the a new maximum charge state to 85% is persistent across reboots to Linux.
My corporate laptop is an HP, not a Thinkpad; . My private laptop is a Thinkpad X131e and it doesn't have this feature in BIOS/UEFI. I use Linux exclusively; it seems that this feature requires one to run a Windows program; there doesn't seem to be a Linux equivalent. I'll boot Windows some time and see if a change of battery-charging settings will carry over after a reboot into Linux, but I doubt it.
You missed 'noexec': user home directory was mounted as noexec filesystem. And probably i left 'chmod' out of /bin just to be sure.