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Just Chat! / The Office

« Last post by varsigma on Today at 03:15:34 »

Hi I found this in an office manual

Office  mission statement

Yea though I wander through the Valley of Expectations
Yet will I bear no responsibility for the consequences of any of my own
For I am a Nob and a Staff member
So get used to it, suckers

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Technology / Re: Does cold weather damage the batteries used in an EV?

« Last post by Petrochemicals on Yesterday at 19:30:46 »

Hi.



   I have just checked this.  I think it's that Li-ion batteries should not be charged below freezing rather than that they cannot be charged.    According to your suggested Batteryuniversity site,  charging them below freezing temperature is always slow and would usually cause permanent damage resulting in lower battery performance.
    That's not something that Tesla ever seem to mention - and it does seem that they use Li-ion batteries of some variant or another.  Even with some clever technology it seems you would still be well advised to charge them at a small fraction of the usual rate when the temperature is below 0.    So, taking a long trip in the winter and putting your vehicle onto a fast charger along the way may be very bad news for the batteries.

Best Wishes.

As for the batteries, you would need to know the car specifics, if it has a battery heater, if it monitors it's temperature if it has different chemistries, I should email the manufacturer. I would call damage a "can not" Evan, technically you can directly use very high voltage power lines to recharge the battery, unfortunately it will probably damage the battery and possibly yourself. Just a matter of time?

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Technology / Re: Does cold weather damage the batteries used in an EV?

« Last post by Petrochemicals on Yesterday at 19:07:57 »

Stats on the subject are still thin on the ground, but ICE cars are between 2 and 20 times more likely to catch fire than a BEV.

Certain chemistry electric batteries catch fire, such as high performance tesla's, many are now different chemistries that are not a fire risk, so I would like to see figures on EVs that have dangerous batteries. Whilst safety in a car is one thing, safety in a house whilst sleeping is quite another, li ion batteries that catch fire are extremely destructive. I believe all large energy storage batteries for houses are of the non flammable type, there are many of those around and you never hear of 1 catching fire, even though they would burn a house down within seconds.

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Technology / Re: Does cold weather damage the batteries used in an EV?

« Last post by paul cotter on Yesterday at 16:39:36 »

The Ford Pinto, a petrol(gasoline) car was prone to self cremation, as far as I remember.

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Just Chat! / Re: Is there a universal moral standard?

« Last post by alancalverd on Yesterday at 15:54:02 »

EV Curve Futurist reveals date that internal combusion will DIE in China

And the electric vehicles will be fuelled by coal, as at present. This makes sense as China has very little native oil, lots of coal, and a strong political incentive to energy independence.

Whilst the Nazis produced ersatz petroleum from coal, it is probably more efficient overall to use electricity as the intermediate, especially as useful idiots in the West are paying for the essential R&D for BEV transport.

Unfortunately as the Thatcher government destroyed the UK coal industry, this option is not available here.

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Just Chat! / Re: Is there a universal moral standard?

« Last post by alancalverd on Yesterday at 15:49:04 »

Our decisions in the past contributes to the hardships that we have to face now. Likewise, our decisions today will contribute to the hardships that we will have to face in the future.

I don't think the decision to make Norway mountainous was a human one. However I agree that the decision to overpopulate the UK was.

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Just Chat! / Re: Where do I get my confidence to challenge established theories?

« Last post by alancalverd on Yesterday at 15:39:34 »

People need some break from routine activities.

Such as kneeling before a parasite every 7 days?

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New Theories / Re: Where does quantization of energy of electromagnetic radiation come from?

« Last post by alancalverd on Yesterday at 15:27:14 »

As I have said many times. Wherever did you get the idea that it might be?

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Technology / Re: Does cold weather damage the batteries used in an EV?

« Last post by alancalverd on Yesterday at 15:10:56 »

The perceived difference in risk is due to the fact that ICEs don't spontaneously combust. The usual point of unintentional ignition occurs when a poorly-maintained vehicle has been running fast and hot, the fuel line comes adrift or the carburettor (remember those?) floods, and a backfire on overrun blows flames out of the air intake.

However well-maintained a BEV may be, early lithium batteries gradually developed in an internal short circuit and self-immolated entirely at random. The problem was occasionally reported in phones and computers but really hit the headlines when Boeing Dreamliners  became a fire hazard. I  think the problem has been  largely eliminated, but the fact remains that a burning BEV is very difficult to extinguish and almost impossible to salvage, which is one reason that insurance premiums have doubled in the last few years.

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New Theories / Re: What makes Riemann's Hypothesis Hard to Prove?

« Last post by hamdani yusuf on Yesterday at 14:55:57 »

https://en.wikipedia.org/wiki/Riemann_sphere

In mathematics, the Riemann sphere, named after Bernhard Riemann, [1] is a model of the extended complex plane (also called the closed complex plane): the complex plane plus one point at infinity. This extended plane represents the extended complex numbers, that is, the complex numbers plus a value ∞ for infinity. With the Riemann model, the point ∞ is near to very large numbers, just as the point 0  is near to very small numbers.

The extended complex numbers are useful in complex analysis because they allow for division by zero in some circumstances, in a way that makes expressions such as 1/0 = ∞ well-behaved. For example, any rational function on the complex plane can be extended to a holomorphic function on the Riemann sphere, with the poles of the rational function mapping to infinity. More generally, any meromorphic function can be thought of as a holomorphic function whose codomain is the Riemann sphere.

Inspired by Riemann's sphere, the extended domain of Zeta function through analytic continuation using functional equation can be remapped to a similar sphere, which I call Zeta sphere.

The dotted black curve shows the location of trivial zeros. While dotted yellow curve shows the location of non-trivial zeros

I reread my older post, and found that this diagram needs more elaboration.

In Riemann's sphere,
- The blue circle represents the real axis of complex number plane.
- The green circle represents the imaginary axis of complex number plane.
- The orange circle represents the unitary circle of complex number plane.

In Zeta sphere,
- The blue circle represents the real axis of complex number plane.
- The green circle represents the critical line of Zeta function.
- The orange circle represents the "unitary circle" of Zeta function.
The values in intersection points between green and orange circles were determined from investigation on S function.