The average current necessary for external pacing ranges from about 50 to 100 milliamperes (mA); 100 mAs applied to an average chest with 50-ohm () resistance for 20 msec delivers 0.1 Joules (J). This is well below the 1-2 J required to cause an uncomfortable tingling sensation in the skin.
See how they account energy transfer(J), and not current by itself? And see how far away are the values of current, from the 1mA you're talking about?
I guess you've never measured water resistance, then:) If you have wet skin, the current will flow trough your skin and not necessarily trough your heart (you know, electrons tend to choose the easiest/least resistant path). But IF you applied it in a way it would flow trough your heart, how would it be? Well, we have the example of the tried and true defibrilators, and the pads using to kickstart a heart in heart transplants. 300J is usually the max rated energy discharge marked as "safe" for the equipment usage, so there you go - you have a threshold.
Given that 300J = 300Ws, that's 300W of power applied per one second of use. To get 300W of power at a current of 1mA, you'd need a very high voltage figure - enough to cause arching. Even if you don't like the 300J figure, with 50J the result would be the same, but it would take more time to reach the same damage level.
In the more common case of touching a 240V line at 60mA, we're not talking about 1mA. Also, if considering a common 240V line(AC), we're not talking about resistance, but impedance, which is a rather different concept. So, technically, the situations where 1mA can kill you, the voltage that you'd need would, by itself, cause much more damage than the current, when mantaining the energy transfer.
Most "moral codes" with such important rules you talk about are younger than your great great grandfather. Anal sex, homossexual relations, and promiscuity in general (with both adults and children) were a common practice trough mankind's history, and without the scientific knowledge or the hygiene of today. Even the meaning of words change - 50 years ago, a man who was popular with the ladies (perhaps behaving like a dog), was called a "gay".
It seems your narrow mind of the world can't conceive infections by blood transfusions, by lineage (children infected from their moms), rape victims (quite common in african countries), superstition, or plain old ignorance.
And you don't need to fuck a bunch of skanks to get the disease - you only need to fuck one. And, considering that the infection window detection varies from 3 to 6 months, you can have a negative test and still be infected. Think about it if you ever start a serious relationship with a sexually active partner.
Considering the technical specs of defibrilators, and assuming that a 300J charge can kill you (probably a much smaller charge can do it, but anyway), you'd need 300W/s - at 1mA, that's a discharge of 300/0.001A = 300,000V applied in a path trough the heart. At that voltage, you probably can create a 10 inch arch trough the air - applied to a person, the arch itself would burn a whole trough the path.
Those are some impressive values, but even considering 500W per PC (and many attendees probably have a laptop), it could easily be done with 3 generators (or 4, using the extra as hot spare)
Standards are written by the people who pay for them, don't forget.:)
Maybe in the US, not here:)
I think there is some scientific background to the 30mA value, but I'm too lazy to search for it. But the 30mA value is used in most residential differential switches across EU, so probably is an international value.
Please note that the 30mA is from the ground wire, possibly originating from a chassis shortcut, so someone touching the equipment would only be affected in the worst case scenario (direct contact with the electrified area and a clear shorter path to the ground). Btw, in industrial installations, the maximum ground current tolerance is 300mA, because many industrial equipment can charge the ground path with more than 30mA.
I'm not shure 10mA is enough to kill an average person. Where I live, electrical installations are required by law to have a differential switch that, for domestic use, should fire at 30mA. what this means is that the switch should cut power automatically if detects a current equal or greater than 30mA on the ground wire, and that value is commonly considered the human threshold limit.
Yeah, I also usually measure the equipment, both desktop and server material. The values I gave you earlier were ballparks from different measures.
A Dell LCD that draws 0.7A at 230V would be consuming 161W - That's more than a 19" CRT. I think you may have measured 0.07A (70 mA) and not 0.7A (700 mA). Check out http://www.dell.com/pt/p/dell-e170s/pd , this 17" monitor is rated at around 17W, consistent with the possibility of wrong measurement.
There are other temporary setups that need a lot of power - construction, live venues, festivals, etc. Getting the required power is not that difficult.
A modern 23" (TFT) display draws less than 40W in use, so at 230V it would be 0.17A. A proliant DL160 with 4 SATA disks and 1xXeon (not a gaming rig!) draws around 160W at bootup. A modern workstation (i3-i5-i7) draws around 70-120W. I have no idea about high-end graphic cards.
The electrical setup shuldn't be that different from one major venue such as stadio concert or music festival - industrial size diesel generators, usually available at up to 1000kW or more, and somewhat easy to rent. 1000kW is almost enough for 5000 computers at a conservative estimate of 200W of real consumption per unit.
It should be noted, that the US were a major supplier of weapons technology to Saddam Hussein, including chemical weapons, so there isn't much of a difference between the devilized mercilless dictactor and the western democratic salesman. It reminds me of an old running joke - "Do you know how the USA knows that Saddam has WMDs? They kept the receipt."
With apache, you can use mod_security to filter many types of attacks before they reach the actual webservers. But yes, for many of my applications, nginx is awesome:)
So, you are saying your election system don't have room for other major parties? And you feel the voice of the people is well represented?
If you think america has free press you are so far down the well you almost can touch the water.
In my country, we don't have forbidden books, we don't have watchlists for subversive literature, we don't have forbidden words you can't say on tv, we don't have censored and/or versioned music (or any other form of art), so yes, it is very clear I'm not an american.
Your coments are the usual nonsense I get from americans that never lived *outside*, but you have no idea of what democracy actually is because defying the concepts that you grew up with is not easy.
So, why the US - that have the 1st amendment, have only 2 major politic forces? Are you saying the majority of the americans agree with the bullshit from either side? Why do you see much more plurality on the governments of european countries? Free speech means nothing if you don't have free press (you don't), when you have censorship (you have, both on books and music), and when the politicians from either side defend corporate interests and not the citizens (you call it a legitimate profession - lobbyist - in EU is almost a criminal activity). So what's left? Either free speech is not required for a democracy, or the USA aren't a democracy. Pick your poison.
If it was a solved problem, you wouldn't see so much companies investing in data search and tagging. Search through normalized data may be a solved problem, but even then not when you have the data spread across hundreds of different systems. Harvesting data ususally isn't the bottleneck, extracting the useful bits of data in a timely fashion is.
You won't be able to rotate the logs when using it directly on the host system. When used in jails, and assuming you use a lower securelevel on the main host, you can create a script on the host to perform the log rotation.
That's why you have securelevels in BSD. Securelevels can limit some operations done by root. It is possible to configure your server in such a way that decreasing securelevels will require access to the machine (physical or kvm).Place the kernel with an immutable flag, and with the appropriate securelevel not even root can remove it.
Of course there are ways around that, and there are ways to harden the system against the ways around that, but it is a nice feature to have - specially in the cases where you have all your services running inside jails, and not on the main host. If using ZFS (UFSv2 will allow you to do the same, but with a 32 snapshot limit or something like that) you can even schedule a periodic filesystem snapshot, that the root user inside the jail won't even be aware of, and have copies of the evolution of your logfiles.
Name one industry that has taken at least 40 to adopt a new technology. Even cars have microprocessors since the early 1980s. Most "traditional" publishing outlets use 10, maybe 15 year old tech.You may question the workflow, and yes, probably is outdated, but the tech is usually up to date. That's how they can keep costs down and margins up.
Slashdot Mirror
The average current necessary for external pacing ranges from about 50 to 100 milliamperes (mA); 100 mAs applied to an average chest with 50-ohm () resistance for 20 msec delivers 0.1 Joules (J). This is well below the 1-2 J required to cause an uncomfortable tingling sensation in the skin.
See how they account energy transfer(J), and not current by itself? And see how far away are the values of current, from the 1mA you're talking about?
I guess you've never measured water resistance, then :) If you have wet skin, the current will flow trough your skin and not necessarily trough your heart (you know, electrons tend to choose the easiest/least resistant path). But IF you applied it in a way it would flow trough your heart, how would it be? Well, we have the example of the tried and true defibrilators, and the pads using to kickstart a heart in heart transplants. 300J is usually the max rated energy discharge marked as "safe" for the equipment usage, so there you go - you have a threshold.
Given that 300J = 300Ws, that's 300W of power applied per one second of use. To get 300W of power at a current of 1mA, you'd need a very high voltage figure - enough to cause arching. Even if you don't like the 300J figure, with 50J the result would be the same, but it would take more time to reach the same damage level.
In the more common case of touching a 240V line at 60mA, we're not talking about 1mA. Also, if considering a common 240V line(AC), we're not talking about resistance, but impedance, which is a rather different concept.
So, technically, the situations where 1mA can kill you, the voltage that you'd need would, by itself, cause much more damage than the current, when mantaining the energy transfer.
Most "moral codes" with such important rules you talk about are younger than your great great grandfather. Anal sex, homossexual relations, and promiscuity in general (with both adults and children) were a common practice trough mankind's history, and without the scientific knowledge or the hygiene of today. Even the meaning of words change - 50 years ago, a man who was popular with the ladies (perhaps behaving like a dog), was called a "gay".
It seems your narrow mind of the world can't conceive infections by blood transfusions, by lineage (children infected from their moms), rape victims (quite common in african countries), superstition, or plain old ignorance.
And you don't need to fuck a bunch of skanks to get the disease - you only need to fuck one. And, considering that the infection window detection varies from 3 to 6 months, you can have a negative test and still be infected. Think about it if you ever start a serious relationship with a sexually active partner.
The point remains that for 1mA to cause real damage, the voltage by itself would burn a hole through the skin.
There are syslog compatible alternatives that already can log to a database.
Considering the technical specs of defibrilators, and assuming that a 300J charge can kill you (probably a much smaller charge can do it, but anyway), you'd need 300W/s - at 1mA, that's a discharge of 300/0.001A = 300,000V applied in a path trough the heart. At that voltage, you probably can create a 10 inch arch trough the air - applied to a person, the arch itself would burn a whole trough the path.
Those are some impressive values, but even considering 500W per PC (and many attendees probably have a laptop), it could easily be done with 3 generators (or 4, using the extra as hot spare)
Standards are written by the people who pay for them, don't forget. :)
Maybe in the US, not here :)
I think there is some scientific background to the 30mA value, but I'm too lazy to search for it. But the 30mA value is used in most residential differential switches across EU, so probably is an international value.
Please note that the 30mA is from the ground wire, possibly originating from a chassis shortcut, so someone touching the equipment would only be affected in the worst case scenario (direct contact with the electrified area and a clear shorter path to the ground). Btw, in industrial installations, the maximum ground current tolerance is 300mA, because many industrial equipment can charge the ground path with more than 30mA.
I'm not shure 10mA is enough to kill an average person. Where I live, electrical installations are required by law to have a differential switch that, for domestic use, should fire at 30mA. what this means is that the switch should cut power automatically if detects a current equal or greater than 30mA on the ground wire, and that value is commonly considered the human threshold limit.
Yeah, I also usually measure the equipment, both desktop and server material. The values I gave you earlier were ballparks from different measures.
A Dell LCD that draws 0.7A at 230V would be consuming 161W - That's more than a 19" CRT. I think you may have measured 0.07A (70 mA) and not 0.7A (700 mA). Check out http://www.dell.com/pt/p/dell-e170s/pd , this 17" monitor is rated at around 17W, consistent with the possibility of wrong measurement.
Apparently you need to invite 5000 nerds into your apartment so you can persuade the ISP to endorse you. If you do it, don't use the bathroom.
There are other temporary setups that need a lot of power - construction, live venues, festivals, etc. Getting the required power is not that difficult.
A modern 23" (TFT) display draws less than 40W in use, so at 230V it would be 0.17A. A proliant DL160 with 4 SATA disks and 1xXeon (not a gaming rig!) draws around 160W at bootup. A modern workstation (i3-i5-i7) draws around 70-120W. I have no idea about high-end graphic cards.
The electrical setup shuldn't be that different from one major venue such as stadio concert or music festival - industrial size diesel generators, usually available at up to 1000kW or more, and somewhat easy to rent. 1000kW is almost enough for 5000 computers at a conservative estimate of 200W of real consumption per unit.
It should be noted, that the US were a major supplier of weapons technology to Saddam Hussein, including chemical weapons, so there isn't much of a difference between the devilized mercilless dictactor and the western democratic salesman. It reminds me of an old running joke - "Do you know how the USA knows that Saddam has WMDs? They kept the receipt."
With apache, you can use mod_security to filter many types of attacks before they reach the actual webservers. But yes, for many of my applications, nginx is awesome :)
So, you are saying your election system don't have room for other major parties? And you feel the voice of the people is well represented?
If you think america has free press you are so far down the well you almost can touch the water.
In my country, we don't have forbidden books, we don't have watchlists for subversive literature, we don't have forbidden words you can't say on tv, we don't have censored and/or versioned music (or any other form of art), so yes, it is very clear I'm not an american.
Your coments are the usual nonsense I get from americans that never lived *outside*, but you have no idea of what democracy actually is because defying the concepts that you grew up with is not easy.
So, why the US - that have the 1st amendment, have only 2 major politic forces? Are you saying the majority of the americans agree with the bullshit from either side? Why do you see much more plurality on the governments of european countries? Free speech means nothing if you don't have free press (you don't), when you have censorship (you have, both on books and music), and when the politicians from either side defend corporate interests and not the citizens (you call it a legitimate profession - lobbyist - in EU is almost a criminal activity). So what's left? Either free speech is not required for a democracy, or the USA aren't a democracy. Pick your poison.
You know why, right? Many of the Sicksextourists _are_ americans.
If it was a solved problem, you wouldn't see so much companies investing in data search and tagging. Search through normalized data may be a solved problem, but even then not when you have the data spread across hundreds of different systems. Harvesting data ususally isn't the bottleneck, extracting the useful bits of data in a timely fashion is.
You won't be able to rotate the logs when using it directly on the host system. When used in jails, and assuming you use a lower securelevel on the main host, you can create a script on the host to perform the log rotation.
That's why you have securelevels in BSD. Securelevels can limit some operations done by root. It is possible to configure your server in such a way that decreasing securelevels will require access to the machine (physical or kvm).Place the kernel with an immutable flag, and with the appropriate securelevel not even root can remove it.
Of course there are ways around that, and there are ways to harden the system against the ways around that, but it is a nice feature to have - specially in the cases where you have all your services running inside jails, and not on the main host. If using ZFS (UFSv2 will allow you to do the same, but with a 32 snapshot limit or something like that) you can even schedule a periodic filesystem snapshot, that the root user inside the jail won't even be aware of, and have copies of the evolution of your logfiles.
Can you disable the removal of the flag by the root user?
How will you corrupt a file that can be only appended to? Even if you append garbage, you cannot change what has been commited already.
Name one industry that has taken at least 40 to adopt a new technology. Even cars have microprocessors since the early 1980s. Most "traditional" publishing outlets use 10, maybe 15 year old tech.You may question the workflow, and yes, probably is outdated, but the tech is usually up to date. That's how they can keep costs down and margins up.
Does a biology textbook evolve?