A chip like http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en545659 this PIC32MX695F512L is $9.58 in single unit quantities and is orders of magnitude more versatile than the 3 Atmel AVRs in the proposed device. It has a full 32-bit processor (MIPS), 512K of Flash, and 128K of RAM, plus ethernet, USB, serial I/O, etc. Couple it with a small FPGA and you can build quite a system that sells for less than $50.00 and still make a little profit.
If you or someone can get me the database files (from Kalmbach?) I am willing to try to extract useful data from them, into simple ASCII text file(s), suitable for loading into a relational database like Postgresql, for free.
Care to share your homebrew "ALFS" scripts, etc. ? I'd love to avoid reinventing the wheel, especially if what you've done is fairly straightforward and clean.
Nicotine is far from harmless. Best to keep people away from it if at all possible. Not by force of law necessarily, but by education and social support.
I took a look at the aggregated US Government idea site, but didn't see the USPTO (United States Patent and Trademark Office).
The USPTO needs a lot of help as far as I'm concerned; too bad they aren't accepting ideas. They do have a "feedback channel" http://www.uspto.gov/blog/feedback but it seems pretty limited.
As the years pass, one thing becomes more and more obvious:
It's all about the data, and keeping it intact. For me (running Ubuntu/Debian on around 20 machines) the most frustrating thing right now is the lack of Sun's (now Oracle's) ZFS or equivalent filesystem. Do you have plans to address this by obtaining the right to incorporate ZFS into Ubuntu at the kernel level, or to fund the development of an alternative like BTRFS?
If your computer is turned off, lightning isn't blowing through the ground line of your UPS like a knife through butter and turning your motherboard into a campfire.
No. The easy, safe, way to protect against lightning strikes is to turn off and unplug the computer so there is no conductive path into it.
Most of the captions are chock full of factual, grammatical, and spelling errors. Sad, because this sort of codswallop is propagated to the unknowing public and difficult to correct once "out of the bag".
I have three machines running Ubuntu 8.04LTS + Virtualbox + Windows XP. This works pretty well for those cases where you prefer Linux but have to be able to run specific Windows applications. I have 4GB of RAM in each of these machines so as to be able to have adequate of RAM for the virtual machine(s).
You are incorrect. Each frame of a 24fps film is displayed ("flashed") onto the screen three (3) times. This yields a pulsation rate of 24*3=72Hz. If 24*2=48Hz. were being used you'd very quickly get a headache.
Back when Microsoft tried to take over the web, I had many issues with many sites. I don't remember the last problem I've had viewing a website.
Well, as a counterexample Fedex just updated their on-line shipping site and it pops up with an "Error Window" stating that Opera is not a supported browser. The last version elicited no such negative response. Opera seems to work just fine with the Fedex site, but I think Fedex is moving in the wrong direction by being more picky rather than less. And yes, I know you can configure Opera to spoof another browser so the error window doesn't pop up, but that's not the point.
Excellent post! The first realistic analysis I've seen on electric car charging on/.
Of course it is worse than this because no battery is able to accept 100% of the charge applied. Less than 100% charge efficiency means a lot of battery heating, and that heat has to be dissipated. That means liquid or forced air cooling (consuming more energy) to prevent battery overheating while charging. The net result is that it is doubtfull that it will be possible to charge batteries fully in less than 30 minutes.
Aside from the frame rate being WAY too slow (they double shutter it, two flashes per frame, so your eye doesn't catch the low data rate, did you know that? Makes it 48hz instead of 24hz, but of course it adds nothing, just stops you from going into an epileptic fit
This isn't true. Standard 24fps movie film is flashed on-screen 3 times/frame for a blink rate of 24*3 = 72Hz. If you were to watch a film blinking at 48Hz. it would probably drive you mad in short order.
This is untrue. The operating temperature of an incandescent lamp is selected to produce as much as light as possible while resulting in a reasonably long life and avoiding melting and vaporization of the tungsten filament.
Volts * Amps = Watts The Amps drawn at a given voltage, and hence wattage consumed by a given incandescent lamp is a function of the applied voltage and the filament's resistance. Volts = Amps * Resistance (Ohms) As the voltage applied is increased, the resistance of the filament must also increase in order to maintain the same wattage, so, a 100 Watt lamp operating at 120 Volts will have a lower resistance filament than a 100 Watt lamp operating at 240 Volts. Both lamps will be designed to operate at a color temperature of approximately 2800 Kelvin. The 240 Volt lamp will have a thinner, longer, weaker filament than the 120 Volt lamp, but will be just as efficient because the filament is operating at the same temperature. The 240 Volt lamp will burn out faster and be more vulnerable to shock and vibration though.
Where are you from? Certainly not the U.S. Virtually nobody here uses incandescent lights in a workshop. Fluorescent lamps have been in use here for decades.
I have a workshop (industrial) with table saws, drill presses, milling machines etc. We use flurorescent lamps.
I have never observed any sort of stroboscopic, "gee I thought the blade wasn't turning" effect in 50 years that could get even close to causing an accident.
Modern electronic ballasts in conjunction with conventional T5,T8, and T12 4 and 8 foot fluorescent ballasts flicker so fast that you couldn't see a "stroboscopic effect" no matter what due to the decay time of the phosphor. In other words, the pulsations are so close together that the lamp only dims slightly between pulses.
Fluorescent lamps driven by conventional magnetic ballasts flicker at 120Hz, not 60Hz. This is because the lamp emits light at both the peak and valley of the AC sine wave. No light is emitted at the zero voltage crossover points of the AC waveform.
Modern (last 10 years) electronic ballasts flicker at 20,000Hz or more. Typical flicker rates are now in the 40-45KHz (40,000 - 45,000Hz) range. Almost all compact fluorescent lamps use high-frequency electronic ballasts. There is absolutely no way you can be affected by this medically.
It IS true that fluorescent lamps generally produce poorer quality light than halogen or incandescent lamps. This is because the phosphors produce light at several wavelengths with strong emission peaks at specific wavelengths unlike halogen and incandescent lamps which produce light over a continuous spectrum from deep infrared to ultraviolet. Incandescent and halogen lamps produce large amounts of infrared light which is wasteful since you cannot see it. Fluorescent lamps produce strong ultraviolet light which is converted by the phosphors on the inside of the tube into red, green, and blue emissions at a number of different wavelengths.
Slashdot Mirror
A chip like http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en545659
this PIC32MX695F512L is $9.58 in single unit quantities and is orders of magnitude more versatile
than the 3 Atmel AVRs in the proposed device. It has a full 32-bit processor (MIPS),
512K of Flash, and 128K of RAM, plus ethernet, USB, serial I/O, etc. Couple it with
a small FPGA and you can build quite a system that sells for less than $50.00 and still
make a little profit.
If you or someone can get me the database files (from Kalmbach?) I am willing
to try to extract useful data from them, into simple ASCII text file(s), suitable
for loading into a relational database like Postgresql, for free.
Care to share your homebrew "ALFS" scripts, etc. ? I'd love to avoid
reinventing the wheel, especially if what you've done is fairly straightforward
and clean.
Nicotine is far from harmless. Best to keep people away from it if at all possible.
Not by force of law necessarily, but by education and social support.
I took a look at the aggregated US Government idea site, but didn't see the
USPTO (United States Patent and Trademark Office).
The USPTO needs a lot of help as far as I'm concerned; too bad they aren't
accepting ideas. They do have a "feedback channel" http://www.uspto.gov/blog/feedback
but it seems pretty limited.
As the years pass, one thing becomes more and more obvious:
It's all about the data, and keeping it intact.
For me (running Ubuntu/Debian on around 20 machines)
the most frustrating thing right now is the lack of Sun's
(now Oracle's) ZFS or equivalent filesystem. Do you have
plans to address this by obtaining the right to incorporate
ZFS into Ubuntu at the kernel level, or to fund the development
of an alternative like BTRFS?
If your computer is turned off, lightning isn't blowing through the ground line of your UPS like a knife through butter and turning your motherboard into a campfire.
No. The easy, safe, way to protect against lightning strikes is to turn off and unplug the computer so there is no conductive path into it.
And this was very interesting reading:
http://www.tvhistory.tv/1938-Scophony-UK.htm
Prove it.
Knowing what I know, and when I knowed it,
I'd say AMD has 4 cores on that die and one
just blowed it.
Most of the captions are chock full of
factual, grammatical, and spelling errors.
Sad, because this sort of codswallop is
propagated to the unknowing public and
difficult to correct once "out of the bag".
scp support is built into many Linux distributions, including
Ubuntu. No installation or searching required.
From the command line:
$scp from to
ex:
$scp file john@a.place.com:~
copies file into the home directory of user john
on host a in the place.com domain.
Why yes, I am a MS shill. I earned US$10 for this post alone!
There. That's better.
I have three machines running Ubuntu 8.04LTS + Virtualbox + Windows XP. This works pretty well
for those cases where you prefer Linux but have to be able to run specific Windows applications.
I have 4GB of RAM in each of these machines so as to be able to have adequate of RAM for the virtual
machine(s).
OK, so what does a professional image editor have to have that GIMP doesn't?
You are incorrect. Each frame of a 24fps film is displayed ("flashed") onto the screen three (3) times. This yields a pulsation rate of 24*3=72Hz. If 24*2=48Hz. were being used
you'd very quickly get a headache.
Thanks.
I found
$ pwgen
to be quite adequate. No parameters required.
Actually PNG screenshots are perfect reproductions of the original screen. There is no blurring at all.
The more trouble this causes, the more effective it will be in hastening patent reform.
Back when Microsoft tried to take over the web, I had many issues with many sites. I don't remember the last problem I've had viewing a website.
Well, as a counterexample Fedex just updated their on-line shipping site and it pops up with an "Error Window" stating that Opera is not a supported browser. The last version elicited no such negative response. Opera seems to work just fine with the Fedex site, but I think Fedex is moving in the wrong direction by being more picky rather than less. And yes, I know you can configure Opera to spoof another browser so the error window doesn't pop up, but that's not the point.
Excellent post! The first realistic analysis I've seen on electric car charging on /.
Of course it is worse than this because no battery is able to accept 100% of the charge applied.
Less than 100% charge efficiency means a lot of battery heating, and that heat has to be dissipated.
That means liquid or forced air cooling (consuming more energy) to prevent battery overheating while
charging. The net result is that it is doubtfull that it will be possible to charge batteries fully
in less than 30 minutes.
Aside from the frame rate being WAY too slow (they double shutter it, two flashes per frame, so your eye doesn't catch the low data rate, did you know that? Makes it 48hz instead of 24hz, but of course it adds nothing, just stops you from going into an epileptic fit
This isn't true. Standard 24fps movie film is flashed on-screen 3 times/frame for a blink rate of 24*3 = 72Hz. If you were
to watch a film blinking at 48Hz. it would probably drive you mad in short order.
This is untrue. The operating temperature of an incandescent lamp is selected to produce as much as light
as possible while resulting in a reasonably long life and avoiding melting and vaporization of the tungsten
filament.
Volts * Amps = Watts
The Amps drawn at a given voltage, and hence wattage consumed by a given incandescent lamp is a function of the applied voltage and
the filament's resistance.
Volts = Amps * Resistance (Ohms)
As the voltage applied is increased, the resistance of the filament must also increase in order to maintain the same wattage,
so, a 100 Watt lamp operating at 120 Volts will have a lower resistance filament than a 100 Watt lamp operating at 240 Volts.
Both lamps will be designed to operate at a color temperature of approximately 2800 Kelvin. The 240 Volt lamp will have a thinner, longer,
weaker filament than the 120 Volt lamp, but will be just as efficient because the filament is operating at the same temperature.
The 240 Volt lamp will burn out faster and be more vulnerable to shock and vibration though.
Where are you from? Certainly not the U.S.
Virtually nobody here uses incandescent lights in a workshop.
Fluorescent lamps have been in use here for decades.
I have a workshop (industrial) with table saws, drill presses,
milling machines etc. We use flurorescent lamps.
I have never observed any sort of stroboscopic, "gee I thought the
blade wasn't turning" effect in 50 years that could get even close
to causing an accident.
Modern electronic ballasts in conjunction with conventional T5,T8, and T12
4 and 8 foot fluorescent ballasts flicker so fast that you couldn't see
a "stroboscopic effect" no matter what due to the decay time of the phosphor.
In other words, the pulsations are so close together that the lamp only dims
slightly between pulses.
Fluorescent lamps driven by conventional magnetic ballasts flicker at 120Hz, not 60Hz.
This is because the lamp emits light at both the peak and valley of the AC sine wave.
No light is emitted at the zero voltage crossover points of the AC waveform.
Modern (last 10 years) electronic ballasts flicker at 20,000Hz or more. Typical
flicker rates are now in the 40-45KHz (40,000 - 45,000Hz) range. Almost all compact
fluorescent lamps use high-frequency electronic ballasts. There is absolutely no
way you can be affected by this medically.
It IS true that fluorescent lamps generally
produce poorer quality light than halogen or incandescent lamps. This is because the
phosphors produce light at several wavelengths with strong emission peaks at specific
wavelengths unlike halogen and incandescent lamps which produce light over a continuous
spectrum from deep infrared to ultraviolet. Incandescent and halogen lamps produce large
amounts of infrared light which is wasteful since you cannot see it. Fluorescent lamps
produce strong ultraviolet light which is converted by the phosphors on the inside of the
tube into red, green, and blue emissions at a number of different wavelengths.