I am driving a Chevy Bolt / Opel Amera-e, and with that car, to drive 440km I have a total charging time of 1h30 to 1h45 (in winter) and also I need to limit my speed to below the allowed max speed. I would love to have faster charging on that car. My colleague in is diesel takes only 5 hours and my it was more than 7. That is 2 hours per trip less that I can spend with my family. 4 hours in total for the round trip.
Except that in winter your range is not 400km, as batteries are less efficient at low temperatures and a part of the energy out of the batteries is needed for heating of the cabin your range decreases a lot. So on a longer winter trips you might need to charge even twice. And if you can charge 2x 20 minutes instead of 2x 40 minutes, that makes a difference.
Yes, Amps (current) do kill more than Volts, however if the voltage is low, there will be never be a high current through your body. For example if you have a battery system that is capable to deliver 10000 Amp, but only at a voltage of 1.5V, it will never kill you! As the resistance (actually impedance) of your body is too high there will not be a high current going through your body. If you would connect both the poles of the battery with a piece of copper, the copper will get really hot, or even melt, as resistance of a copper is very low.
Don't believe all this marketing crap. This is definitely not the first nationwide long range network IOT network. The French did beat the Dutch on this with their SigFox network (in early 2015. source). Sigfox is even rolled out nation wide in the Netherlands already. As is in Spain, Portugal and Ireland. And many countries will follow, like the USA, Brazil and Germany. Good thing is that Sigfox does not know about roaming, Sigfox will work no matter where you are as long you have coverage and your device is operating in the same frequency band. As Europe it operates in the 868 MHz and USA in the 902 MHz ISM band.
So what is the Volt? It is an electrical vehicle (EV) (mode 1 and 2) and when the battery is depleted it turns into a hybrid card. In hybrid mode it can be either Serial and Parallel Hybrid car depending on the mode.
Further the explanation of mode 4 is not correct, The gas engine engages over the planetary gear such that it reduces the speed of the primary motor (MGB) AND drivers the second electric motor (MGA) to generate electricity which is used for powering MGB and or refilling the buffer in the battery pack.In both mode 3 and mode 4 the battery pack is used as a buffer. For peak demands energy from the battery is 'borrowed' which is later refilled when demand is below average. On average all the power comes from the gas engine.The total charge of the battery stays the same, unless you drive a very extreme road where the average power goes above the power the gas engine can deliver. Think about a very long mountain climb at high speeds.
CFLs :..., not very dimmable,...
LEDs :..., dimmable,...
I understand why you say this, however I must disappoint you, it is not correct. It is also very easy to dimm a CFL. For a retrofit LED lamp (thus in the shape of a incandescent bulb), you have to add as much electronics to dim the LEDs as you would need to dim a CFL lamp.
Technically, dimming a CFL is as easy as increasing the frequency of the oscillator that drivers the CFL tube. The only issue is the TRIAC dimmer in the wall that does not like the low power of the CFL lamp (or LED lamp). Translating the dimmer position to the oscillator frequency is easy.
The same is also true for LEDs. That is why many retrofit LED lamps are also not dimmable (there are dimmable retrofit LED as well!).
As soon as we get rid of the old fashion 2 wire TRIAC or transistor dimmers, we can dim CFL and LED easily, and safe even more energy in the end because we do not have to dissipate extra energy only to keep the dimmer happy.
80% efficiency for AC to DC conversion to run an LED would be absolutely awful; you can do much better than that.
please do not forget that it has to be cheap as well. Most people do not want to pay 100 bucks for a light bulb. I am not aware of a cheap (less than a few bucks) very high efficient AC/DC converter
Electronics (basically, said AC to DC converter) to last 25000 hours shouldn't be a problem either.
It should not be a problem, however it is. Especially because the electronics is often close the the LED (compact retrofit lamp), which means higher temperatures. And a 10 degrees Celcius temperature increase means that the lifetime of your silicon IC is halved. Many things can be done to increase the lifetime, but unfortunately that will increase the price as well. And as said before, it still needs to be dirt cheap...
You either did not read the the article or you did not understand it. Let me explain. The prices will be given if you have a lamp that 1) uses less than 10W 2) outputs 900lm (which is equal to a 60W bulb) 3) have a CRI of 90 or higher 4) lasts for at least 25000 hours. All these 4 points are a major challenge!
First you need a lamp that uses less than 10Watt. You will loose some power in the conversion from 120V AC (or 230V) to the lower DC levels the LEDs want. Say you have a 80% efficiency, which is feasible right now. That means 8W left to generate 900lm. This means that your LEDS needs to generate 112.5 lm/watt. Most commercial LEDS are now around 50 to 75 lm/watt.... still a long way to go.
The CRI tells something about the quality of the light. A CRI of 100 is a very natural white light source, like the sun. A CRI of 75 is clearly noticeable as unnatural white light. Current white leds do not have a CRI of 90 yet.
The last point is a lifetime of 25000 hours of the whole lamp. Maybe the LEDS can run 50000 hours, but your electronics will not. How long does your cellphone last until it breaks down? Less than a sew years... Or a your TV? A TV is build for 10 years normal use. Normal use means a few hours per day. This means less than 10000 hours. more likely 5000 hours. To improve the electronics lifetime also some work has to be done.
So the what to do: improve the efficiency of your converter, improve the light output and CRI of the LEDS and improve the lifetime of the electronics. This is a challenge!
Why not stick to twm? It was even running fast on my first unix station, a 80MHz 88K cpu (datageneral) some 15 years ago. And the good news is that is probably already installed on any linux computer with X11. Because it comes with X11...
All you write makes sense, finally someone that knows what he/she is talking about.
I want to point something out though. Although LED lifetime is often claimed to be 50000 hours or more (70K, even 100K), I am sure that the first LED lamps on the market will fail before the LED itself fails... Why? Because wires will corrode or the electronics needed to run the LED will fail first.
Most consumer electronics is designed for 10 years of average operation, which is like 6000 hour of operating. Even electronics in a car does not need to work longer than that. (say 300000km with an average speed of 50km/h = 6000 hours of driving).
So if nothing is done and standard electronic components are taken, the electronics will fail at less than 12% (6000/50000) of the lifetime of the LED.
For CFL bulbs this is not a big issue, there their life time is close tho the lifetime of the electronics anyway.
The focus of a new window is determined by the window manager only, not the application.
The choice in which virtual desktop it opens might be an application issue, but there I am not sure.
I beg to differ. Lumileds, Cree and others are making high-power leds on a large scale
You can tell when a light is pulsed, even to hundreds of pps
The advantage is that LEDs can be turned on in a few nanoseconds, which means that you could us PWM (pulsing) to dim leds at very high frequencies, 100KHz and higher is possible. However I am sure that at 500Hz you will not even notice it.
I am amazed that it is only happening now. Years ago I was already thinking that it would happen a lot. Maybe it did, but that only now people are reporting about it?
do not stop progress by not wanting 'bloat'...
on
KDE 4.0 RC 1 Released
·
· Score: 2, Insightful
Yes, I agree with you, xfce is a better choice. I am actually running xfce4.4.1 on my systems. Occasionally I do use twm, mostly by accident;-) It is always a pain to use, but it does work...
But the whole "discussion" between gnome and kde is so useless. And also the bloated thing. Who cares? More and more people (will) have multiple cores and a few Giga bytes of memory. If the window manager uses some of these resources and it makes your job easier, please do!!! In case you have a smaller computer, then go and use a smaller desktop system. And do not 'force' your limitations on everyone else by wanting to have kde/gnome to run on every computer you own.
Once again, if anyone knows of solutions to these issues that I am ignorant of, I'd be grateful to hear them. Other than what I have related, though, K/X/Ubuntu 6.10 boots very quickly, and I am quite happy with it.
And as soon as ubuntu will switch to real upstart scripts, and is not using the old sysvinit scripts in upstart compatible mode as it is doing now, you will have an even faster booting machine.
For me I just get to many emails about to many subjects, and besides answering and archiving emails I have to work aswell!
It is a skill but there are limits. I can not manage to keep my inbox clean anymore. I always tried to do so. I have more than 100 different folders to store the different messages in. However nowadays I receive between 40 and 100 new email each day (99% are work related, we have a good spam filter). Many of them I will move to appropiate folders but some I have to leave in the inbox there I do not know yet where to file them. Last summer my inbox exploded to 800+ emails and grew to 1300 where I am now. and it is very stable around this level (still growing but slowly). On average I collect about 1GB of work emails per year!
Sometimes I spend an afternoon cleaning up the inbox, but then I feel I better can do some work instead of spending time on that....
If you crash on startup, you may have an outdated version of glibc, or a bad
interaction between Nvidia's drivers and glibc's pthread support. Many of
these cases can be resolved by exporting this environment variable before
running Google Earth.
LD_ASSUME_KERNEL=2.4.10
Alternately, consider upgrading your video drivers, which has been known to
fix this situation, too. We have also seen one case of the Nvidia drivers
mistaking the type of glibc installed, which was remedied with
LD_ASSUME_KERNEL, but in this case, a driver upgrade might be a better
solution. Installing the Nvidia drivers with the --force-tls=new option
may be a solution, but please don't do this unless you are sure of what
you are doing.
Yes you are right, the original method is better for a wider number of systems.
But it has nothing to do with me expertise. I knew about different tar commands, but since I am using GNU tar I completly forgot about all the others. I am using unix for over 15 years and I do remember (the hell) of pipes and uncompress and later gzip/gzcat/bzip2. I am happy that all the systems I am working with now do have GNU tar.
Slashdot Mirror
I am driving a Chevy Bolt / Opel Amera-e, and with that car, to drive 440km I have a total charging time of 1h30 to 1h45 (in winter) and also I need to limit my speed to below the allowed max speed. I would love to have faster charging on that car. My colleague in is diesel takes only 5 hours and my it was more than 7. That is 2 hours per trip less that I can spend with my family. 4 hours in total for the round trip.
Except that in winter your range is not 400km, as batteries are less efficient at low temperatures and a part of the energy out of the batteries is needed for heating of the cabin your range decreases a lot. So on a longer winter trips you might need to charge even twice. And if you can charge 2x 20 minutes instead of 2x 40 minutes, that makes a difference.
Yes, Amps (current) do kill more than Volts, however if the voltage is low, there will be never be a high current through your body. For example if you have a battery system that is capable to deliver 10000 Amp, but only at a voltage of 1.5V, it will never kill you! As the resistance (actually impedance) of your body is too high there will not be a high current going through your body. If you would connect both the poles of the battery with a piece of copper, the copper will get really hot, or even melt, as resistance of a copper is very low.
On CBS or Pirate Bay? I just watched it on Netflix last night!
Don't believe all this marketing crap. This is definitely not the first nationwide long range network IOT network. The French did beat the Dutch on this with their SigFox network (in early 2015. source). Sigfox is even rolled out nation wide in the Netherlands already. As is in Spain, Portugal and Ireland. And many countries will follow, like the USA, Brazil and Germany. Good thing is that Sigfox does not know about roaming, Sigfox will work no matter where you are as long you have coverage and your device is operating in the same frequency band. As Europe it operates in the 868 MHz and USA in the 902 MHz ISM band.
I did uninstall Flash a few months ago. The only issue I have is that I cannot watch the slashdots videos. Oh well, won;t miss much there I guess ;-)
Probably Guido van Rossum himself came to the USA on a H1-B visa, before he got his green card.
So what is the Volt? It is an electrical vehicle (EV) (mode 1 and 2) and when the battery is depleted it turns into a hybrid card. In hybrid mode it can be either Serial and Parallel Hybrid car depending on the mode.
Further the explanation of mode 4 is not correct, The gas engine engages over the planetary gear such that it reduces the speed of the primary motor (MGB) AND drivers the second electric motor (MGA) to generate electricity which is used for powering MGB and or refilling the buffer in the battery pack.In both mode 3 and mode 4 the battery pack is used as a buffer. For peak demands energy from the battery is 'borrowed' which is later refilled when demand is below average. On average all the power comes from the gas engine.The total charge of the battery stays the same, unless you drive a very extreme road where the average power goes above the power the gas engine can deliver. Think about a very long mountain climb at high speeds.
LEDs :
I understand why you say this, however I must disappoint you, it is not correct. It is also very easy to dimm a CFL. For a retrofit LED lamp (thus in the shape of a incandescent bulb), you have to add as much electronics to dim the LEDs as you would need to dim a CFL lamp.
Technically, dimming a CFL is as easy as increasing the frequency of the oscillator that drivers the CFL tube. The only issue is the TRIAC dimmer in the wall that does not like the low power of the CFL lamp (or LED lamp). Translating the dimmer position to the oscillator frequency is easy.
The same is also true for LEDs. That is why many retrofit LED lamps are also not dimmable (there are dimmable retrofit LED as well!).
As soon as we get rid of the old fashion 2 wire TRIAC or transistor dimmers, we can dim CFL and LED easily, and safe even more energy in the end because we do not have to dissipate extra energy only to keep the dimmer happy.
Missing Option: All of the above...
80% efficiency for AC to DC conversion to run an LED would be absolutely awful; you can do much better than that.
please do not forget that it has to be cheap as well. Most people do not want to pay 100 bucks for a light bulb. I am not aware of a cheap (less than a few bucks) very high efficient AC/DC converter
Electronics (basically, said AC to DC converter) to last 25000 hours shouldn't be a problem either.
It should not be a problem, however it is. Especially because the electronics is often close the the LED (compact retrofit lamp), which means higher temperatures. And a 10 degrees Celcius temperature increase means that the lifetime of your silicon IC is halved. Many things can be done to increase the lifetime, but unfortunately that will increase the price as well. And as said before, it still needs to be dirt cheap ...
You either did not read the the article or you did not understand it. Let me explain. The prices will be given if you have a lamp that
1) uses less than 10W
2) outputs 900lm (which is equal to a 60W bulb)
3) have a CRI of 90 or higher
4) lasts for at least 25000 hours.
All these 4 points are a major challenge!
First you need a lamp that uses less than 10Watt. You will loose some power in the conversion from 120V AC (or 230V) to the lower DC levels the LEDs want. Say you have a 80% efficiency, which is feasible right now. That means 8W left to generate 900lm. This means that your LEDS needs to generate 112.5 lm/watt. Most commercial LEDS are now around 50 to 75 lm/watt.... still a long way to go.
The CRI tells something about the quality of the light. A CRI of 100 is a very natural white light source, like the sun. A CRI of 75 is clearly noticeable as unnatural white light. Current white leds do not have a CRI of 90 yet.
The last point is a lifetime of 25000 hours of the whole lamp. Maybe the LEDS can run 50000 hours, but your electronics will not. How long does your cellphone last until it breaks down? Less than a sew years... Or a your TV? A TV is build for 10 years normal use. Normal use means a few hours per day. This means less than 10000 hours. more likely 5000 hours. To improve the electronics lifetime also some work has to be done.
So the what to do: improve the efficiency of your converter, improve the light output and CRI of the LEDS and improve the lifetime of the electronics. This is a challenge!
Why not stick to twm? It was even running fast on my first unix station, a 80MHz 88K cpu (datageneral) some 15 years ago. And the good news is that is probably already installed on any linux computer with X11. Because it comes with X11...
I want to point something out though. Although LED lifetime is often claimed to be 50000 hours or more (70K, even 100K), I am sure that the first LED lamps on the market will fail before the LED itself fails... Why? Because wires will corrode or the electronics needed to run the LED will fail first.
Most consumer electronics is designed for 10 years of average operation, which is like 6000 hour of operating. Even electronics in a car does not need to work longer than that. (say 300000km with an average speed of 50km/h = 6000 hours of driving).
So if nothing is done and standard electronic components are taken, the electronics will fail at less than 12% (6000/50000) of the lifetime of the LED.
For CFL bulbs this is not a big issue, there their life time is close tho the lifetime of the electronics anyway.
The focus of a new window is determined by the window manager only, not the application. The choice in which virtual desktop it opens might be an application issue, but there I am not sure.
I beg to differ. Lumileds, Cree and others are making high-power leds on a large scale
The advantage is that LEDs can be turned on in a few nanoseconds, which means that you could us PWM (pulsing) to dim leds at very high frequencies, 100KHz and higher is possible. However I am sure that at 500Hz you will not even notice it.
I am amazed that it is only happening now. Years ago I was already thinking that it would happen a lot. Maybe it did, but that only now people are reporting about it?
Yes, I agree with you, xfce is a better choice. I am actually running xfce4.4.1 on my systems. Occasionally I do use twm, mostly by accident ;-) It is always a pain to use, but it does work...
But the whole "discussion" between gnome and kde is so useless. And also the bloated thing. Who cares? More and more people (will) have multiple cores and a few Giga bytes of memory. If the window manager uses some of these resources and it makes your job easier, please do!!! In case you have a smaller computer, then go and use a smaller desktop system. And do not 'force' your limitations on everyone else by wanting to have kde/gnome to run on every computer you own.
And I prefere twm (http://en.wikipedia.org/wiki/Twm). And it is available on almost any machine running X11!
And as soon as ubuntu will switch to real upstart scripts, and is not using the old sysvinit scripts in upstart compatible mode as it is doing now, you will have an even faster booting machine.
It is a skill but there are limits. I can not manage to keep my inbox clean anymore. I always tried to do so. I have more than 100 different folders to store the different messages in. However nowadays I receive between 40 and 100 new email each day (99% are work related, we have a good spam filter). Many of them I will move to appropiate folders but some I have to leave in the inbox there I do not know yet where to file them. Last summer my inbox exploded to 800+ emails and grew to 1300 where I am now. and it is very stable around this level (still growing but slowly). On average I collect about 1GB of work emails per year!
Sometimes I spend an afternoon cleaning up the inbox, but then I feel I better can do some work instead of spending time on that....
Yes you are right, the original method is better for a wider number of systems.
But it has nothing to do with me expertise. I knew about different tar commands, but since I am using GNU tar I completly forgot about all the others. I am using unix for over 15 years and I do remember (the hell) of pipes and uncompress and later gzip/gzcat/bzip2. I am happy that all the systems I am working with now do have GNU tar.