authority, should never, ever, be given the benefit of the doubt just because its labeled as "authority". Such blind trust has caused so much damage throughout the history of human kind its terrifying.
POE+ uses the spare pairs and induces a DC offset onto the differential signal pairs ala "phantom power".
in either case the specified current is much higher than a phone line can provide.
doubtful the AC ring would have any effect, the frequency is far too low and current is extremely limited and the differential nature of ethernet's signaling would cancel out noise of this type anyway.
however, the analog phone line most likely would pick up some rather obnoxious noise from the ethernet lines. the carrier frequencies are clearly well above the audio spectrum but you could likely hear packet bursts, like setting your cell phone next to a speaker.
generally this is included in development as an easier way to load and test a firmware than using a physical programmer partially due to needing physical access to a connector on a PCB to program. It is also some times done to speed your time to market.
All you need to complete is the bootloader, that is, the software that allows firmware update via USB, and your manufacturing team can do into full speed work, when the final firmware is ready you just program the devices you've already completed, package and your good to go. Alternatively you would have to have the firmware on complete lock before a manufacturing run could even begin.
As to the "ROM" debate. Flash is used because its cheaper, faster to develop with, and faster/cheaper to manufacture with. Most types of "ROM" require special,expensive hardware to program, flash is often easier/cheaper/faster and requires a very simple device to program. Flash is also often internally re-writable by the microcontroller which can some times, depending on # of re-write cycles, eliminate the need for separate EEPROM.
Mac computers can run Windows, but this is a second operating system purchase to the user, thus not the same primary OS market.
Windows users can not run Mac OS on their machines (at least not legally/easily) therefore this is again, a different market.
Mac OS upgrade has better be cheaper as their hardware costs a large amount more.
The only direct competition with windows on the desktop with generic hardware is linux (solaris/freebsd to lesser extent) but quite clearly this issue is much more complicated than pricing alone.
i actually live in South Boston, i have no idea where the SouthCoast is, we call it the South Shore, or just Shore girls, you can normally identify girls from this area from the tell tale accent and excessive volume the second you walk into a bar, they are to Boston what Jersey girls are to NYC
Hate to burst your bubble, but E85 is 85% ethanol. And it's quite apparent that you know nothing of math or energy density. The energy density of ethanol is about 26 MJ/kg whereas the energy density of gasoline is almost twice that at about 45 MJ/kg. So to answer your last quesion, you'd most likely get less than half the mileage out of your car if you used E100 (100% ethanol). BTW E0 is 0% ethanol, ie pure gasoline.
there are more important factors than energy density here, for instance pure ethanol has an octane rating of ~116 allowing much higher combustion chamber pressures prior to detonation netting a power gain over what can be achieved with gasoline. granted the car needs to be designed for this, through higher compression piston, higher boost levels, and/or modified ignition timing.
theres a reason that ethanol is used in some drag leagues, and its not because of lower power output:)
other than that, it is an interesting controls project, most interesting part will be getting accurate sensor information without spending a ton on a decent gyro...
build a simulator or you will wreck a lot of airplanes before you get it working 100%
use the cell phone network for comms if your going outside ~5 miles, 900mhz radios should reach that far line of sight with a decent antenna.
as i recently tried to use Zigbee Pro in a development project and ended up throwing it away in favor of a custom 900mhz star network, let me say this...
ZigBee is poorly designed for almost any application. its a 250k/bit link that at most can pass data at 20kbit, the rest is eaten up in the overhead of the mesh, theres also no support at the protocol level for transmitting information larger than 1 packet, which, if your using encryption, is 70 bytes.
Zigbee should stay where it was originally designed for, industrial sensors and hvac controls, for home automation its not enough, light switches, fine...anything that has to listen and take action (window shades) is going to need power anyway and might as well use X10 at that point.
the term "sequential writes" loses meaning in regards to SSD's, a wear leveling algorithm by definition is going to move those blocks around such that they are no longer sequential in nature anyway, assuming that the disk is being used in random nature, that is you do more than just non-stop sequential writes over its life time
thats like saying a pitcher has proven he can throw strikes because he can throw a ball to the backstop...
FFS getting the thing up is the easy bit, getting it to come down and hit anything close to what you were aiming at is the hard part, especially when your aiming at a narrow island like japan, clearly they have failed at getting it up, perhaps some more junk mail from cialis is needed?
conn = 5,544 square miles, earth = 196,939,900 square miles of which 139,433,845 square miles is water...so even if it weren't already floating, your answer is no
outside of this being based on an unproven assumption (there is still MUCH debate regarding the effect of CO2 emissions). the amount of CO2 produced is minuscule compared to industry or even other carbonated beverages, soda consumption in the us for example (~150 quarts per year per capita vs 85 for beer) as others noted most beer is artificially carbonated just as soda, if you've ever had cask ale your familiar with how much carbonation the brewing process creates, which isn't much.
or course you could also look a step down the road and realize that CO2 emissions are a boon to lush plant growth which removes CO2 and emits oxygen, could it be, that the earth's biosphere is self regulating? no, can't be
i don't think it says anything about market share, the vast majority of eve linux players have played in wine for years, which they don't track, CCP's numbers only indicated the number of people using the offical client, which i would venture to say is a very small % of the total number of linux users running eve.
if you had ever used the official linux client from CCP you'd know that its a bug ridden POS that only ran in classic graphics mode when it worked. also remember that its not a native client, its the windows client in a cedega wrapper.
eve has worked well/perfectly under wine for years now including full premium graphics. From CCP's perspective, why spend money to provide something the community has already provided for itself, that is the linux way after all right? a community that provides for itself?
as someone who gives CCP $ each month i'm glad they dropped the client, they should be spending $ on more useful things than repeating work that has already been completed at a higher level of quality.
testosterone infused giants beating the tar out of each other while discussion taking untested injections to repair injuries just enough to play while ignoring all side effects, thats completely comfortable to watch with the kiddies.....
display and discussion of our natural bodies and activities, uncomfortable.....
fail....
proposing a HAM radio for a senior design project at my school would have gotten you laughed out of your advisor's office, you should be able to design and build one from scratch during non-linear electronics class freshman or sophomore year...or at age 13 if you can read a book.
agreed, she should have dropped out of college anyway as clearly using a computer is too hard...
however i feel her pain a bit on the ISP issue, out of the 5 computers i own, none run windows, every time i change apartments i have to spend 45min on the phone with comcast to get someone on the phone that can activate my account without the stupid app on the CD....
cheers,
x
not true, you can only have 1 listener per socket under standard stacks. you can have as many sockets per port as you please (within resource limits) just set SO_REUSEADDR and realize you may get data from the other process, thus you have to filter, normally based on the remote host/port.
point of all of this is that they're filtering is completely pointless, all of it, without exception, can be circumvented.
20 minutes after the ban the number of SSH tunnels out of Australia goes up by several orders of magnitude and american based proxy services profits hit record highs. Maybe Australia is trying to pull the US economy out of the ditches?
Keep in mind that USB is a shared bandwidth architecture so you are getting 5gbps divided up among all the devices on that particular USB host controller which actually can make a quite large difference, i know it will for me with the 10 USB devices, not counting usb drives, that are normally attached my system.
Also, USB is a very overhead intensive architecture, USB 2.0 @ 480mbps signal rate really would only hit data rates of ~320mbps most of the time..
cheers,
x
the Linux kernel's memory management isn't so great at the situation you hit when you need more memory than you have, but you can't swap. Usually, the memory hog crashes as a result (thankfully, Firefox now has session restore).
actually this is wrong, in the 'default' configuration for the linux kernel it kill the highest memory using processes to free up space.
this is something that should be more well known since its not the behavior you want on a production server with high memory usage applications. such systems need to check the configuration and build a new kernel if needed.
cheers,
x
Slashdot Mirror
authority, should never, ever, be given the benefit of the doubt just because its labeled as "authority". Such blind trust has caused so much damage throughout the history of human kind its terrifying.
read: http://en.wikipedia.org/wiki/Milgram_experiment
not really...
POE uses the two spare pairs to provide 48VDC
POE+ uses the spare pairs and induces a DC offset onto the differential signal pairs ala "phantom power".
in either case the specified current is much higher than a phone line can provide.
doubtful the AC ring would have any effect, the frequency is far too low and current is extremely limited and the differential nature of ethernet's signaling would cancel out noise of this type anyway.
however, the analog phone line most likely would pick up some rather obnoxious noise from the ethernet lines. the carrier frequencies are clearly well above the audio spectrum but you could likely hear packet bursts, like setting your cell phone next to a speaker.
generally this is included in development as an easier way to load and test a firmware than using a physical programmer partially due to needing physical access to a connector on a PCB to program. It is also some times done to speed your time to market.
All you need to complete is the bootloader, that is, the software that allows firmware update via USB, and your manufacturing team can do into full speed work, when the final firmware is ready you just program the devices you've already completed, package and your good to go. Alternatively you would have to have the firmware on complete lock before a manufacturing run could even begin.
As to the "ROM" debate. Flash is used because its cheaper, faster to develop with, and faster/cheaper to manufacture with. Most types of "ROM" require special,expensive hardware to program, flash is often easier/cheaper/faster and requires a very simple device to program. Flash is also often internally re-writable by the microcontroller which can some times, depending on # of re-write cycles, eliminate the need for separate EEPROM.
Seriously, not the same market...
Mac computers can run Windows, but this is a second operating system purchase to the user, thus not the same primary OS market.
Windows users can not run Mac OS on their machines (at least not legally/easily) therefore this is again, a different market.
Mac OS upgrade has better be cheaper as their hardware costs a large amount more.
The only direct competition with windows on the desktop with generic hardware is linux (solaris/freebsd to lesser extent) but quite clearly this issue is much more complicated than pricing alone.
I always preferred the approach of howmanywouldittake.com (now defunct)...
always seemed so much more realistic to rate attractiveness by required level of intoxication than some artificial 0-10 scale
am I missing something or isn't there already an Android emulator in the SDK from google? Isn't this just a rewrite of the same thing?
i actually live in South Boston, i have no idea where the SouthCoast is, we call it the South Shore, or just Shore girls, you can normally identify girls from this area from the tell tale accent and excessive volume the second you walk into a bar, they are to Boston what Jersey girls are to NYC
Hate to burst your bubble, but E85 is 85% ethanol. And it's quite apparent that you know nothing of math or energy density. The energy density of ethanol is about 26 MJ/kg whereas the energy density of gasoline is almost twice that at about 45 MJ/kg. So to answer your last quesion, you'd most likely get less than half the mileage out of your car if you used E100 (100% ethanol). BTW E0 is 0% ethanol, ie pure gasoline.
there are more important factors than energy density here, for instance pure ethanol has an octane rating of ~116 allowing much higher combustion chamber pressures prior to detonation netting a power gain over what can be achieved with gasoline. granted the car needs to be designed for this, through higher compression piston, higher boost levels, and/or modified ignition timing.
theres a reason that ethanol is used in some drag leagues, and its not because of lower power output :)
67% of dollar bills in this study, and thats south shore mass, i would expect manhattan to step that number up a bit.
http://www.southcoasttoday.com/apps/pbcs.dll/article?AID=/20080411/NEWS/804110348
if your in the US your getting into a legal shit storm, look here:
http://www.faa.gov/aircraft/air_cert/design_approvals/uas/reg/media/frnotice_uas.pdf
and here
http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgAdvisoryCircular.nsf/0/1ACFC3F689769A56862569E70077C9CC?OpenDocument&Highlight=91
other than that, it is an interesting controls project, most interesting part will be getting accurate sensor information without spending a ton on a decent gyro...
build a simulator or you will wreck a lot of airplanes before you get it working 100%
use the cell phone network for comms if your going outside ~5 miles, 900mhz radios should reach that far line of sight with a decent antenna.
as i recently tried to use Zigbee Pro in a development project and ended up throwing it away in favor of a custom 900mhz star network, let me say this... ZigBee is poorly designed for almost any application. its a 250k/bit link that at most can pass data at 20kbit, the rest is eaten up in the overhead of the mesh, theres also no support at the protocol level for transmitting information larger than 1 packet, which, if your using encryption, is 70 bytes. Zigbee should stay where it was originally designed for, industrial sensors and hvac controls, for home automation its not enough, light switches, fine...anything that has to listen and take action (window shades) is going to need power anyway and might as well use X10 at that point.
the term "sequential writes" loses meaning in regards to SSD's, a wear leveling algorithm by definition is going to move those blocks around such that they are no longer sequential in nature anyway, assuming that the disk is being used in random nature, that is you do more than just non-stop sequential writes over its life time
thats like saying a pitcher has proven he can throw strikes because he can throw a ball to the backstop... FFS getting the thing up is the easy bit, getting it to come down and hit anything close to what you were aiming at is the hard part, especially when your aiming at a narrow island like japan, clearly they have failed at getting it up, perhaps some more junk mail from cialis is needed?
edit: yes i'm ignoring the entire volume vs 2d surface area discrepancy in this entire line of argument.
conn = 5,544 square miles, earth = 196,939,900 square miles of which 139,433,845 square miles is water...so even if it weren't already floating, your answer is no
outside of this being based on an unproven assumption (there is still MUCH debate regarding the effect of CO2 emissions). the amount of CO2 produced is minuscule compared to industry or even other carbonated beverages, soda consumption in the us for example (~150 quarts per year per capita vs 85 for beer) as others noted most beer is artificially carbonated just as soda, if you've ever had cask ale your familiar with how much carbonation the brewing process creates, which isn't much. or course you could also look a step down the road and realize that CO2 emissions are a boon to lush plant growth which removes CO2 and emits oxygen, could it be, that the earth's biosphere is self regulating? no, can't be
i don't think it says anything about market share, the vast majority of eve linux players have played in wine for years, which they don't track, CCP's numbers only indicated the number of people using the offical client, which i would venture to say is a very small % of the total number of linux users running eve. if you had ever used the official linux client from CCP you'd know that its a bug ridden POS that only ran in classic graphics mode when it worked. also remember that its not a native client, its the windows client in a cedega wrapper. eve has worked well/perfectly under wine for years now including full premium graphics. From CCP's perspective, why spend money to provide something the community has already provided for itself, that is the linux way after all right? a community that provides for itself? as someone who gives CCP $ each month i'm glad they dropped the client, they should be spending $ on more useful things than repeating work that has already been completed at a higher level of quality.
testosterone infused giants beating the tar out of each other while discussion taking untested injections to repair injuries just enough to play while ignoring all side effects, thats completely comfortable to watch with the kiddies..... display and discussion of our natural bodies and activities, uncomfortable..... fail....
proposing a HAM radio for a senior design project at my school would have gotten you laughed out of your advisor's office, you should be able to design and build one from scratch during non-linear electronics class freshman or sophomore year...or at age 13 if you can read a book.
agreed, she should have dropped out of college anyway as clearly using a computer is too hard... however i feel her pain a bit on the ISP issue, out of the 5 computers i own, none run windows, every time i change apartments i have to spend 45min on the phone with comcast to get someone on the phone that can activate my account without the stupid app on the CD.... cheers, x
not true, you can only have 1 listener per socket under standard stacks. you can have as many sockets per port as you please (within resource limits) just set SO_REUSEADDR and realize you may get data from the other process, thus you have to filter, normally based on the remote host/port. point of all of this is that they're filtering is completely pointless, all of it, without exception, can be circumvented.
20 minutes after the ban the number of SSH tunnels out of Australia goes up by several orders of magnitude and american based proxy services profits hit record highs. Maybe Australia is trying to pull the US economy out of the ditches?
Keep in mind that USB is a shared bandwidth architecture so you are getting 5gbps divided up among all the devices on that particular USB host controller which actually can make a quite large difference, i know it will for me with the 10 USB devices, not counting usb drives, that are normally attached my system. Also, USB is a very overhead intensive architecture, USB 2.0 @ 480mbps signal rate really would only hit data rates of ~320mbps most of the time.. cheers, x
the Linux kernel's memory management isn't so great at the situation you hit when you need more memory than you have, but you can't swap. Usually, the memory hog crashes as a result (thankfully, Firefox now has session restore).
actually this is wrong, in the 'default' configuration for the linux kernel it kill the highest memory using processes to free up space. this is something that should be more well known since its not the behavior you want on a production server with high memory usage applications. such systems need to check the configuration and build a new kernel if needed. cheers, x