I'm pretty sure this is patented. Currie Tech came out with such a wheel, and then quickly discontinued all mention of it. Since the focus of Currie Tech seems to be Chinese imports, I suspect that their wheel is manufactured and sold in China, where such issues as IP ownership are less formidable than here.

That said, I'm not sure I'd want such a wheel, because I'd be concerned about loss of control. Every so often with my $450 currie tech bike, the pedal assist kicks in where it is unwanted, like at a light, waiting for cross traffic to end. I have a control on it: my hand brake cutout. However, I don't know that I'd have any limitation on misbehavior by a Copenhagen wheel.

I don't know whether to believe you or not. On the one hand, it sounds like a snide remark, intended to be silly. On the other hand, in 2000 I taught school at a magnet school in one of the ex-satellite countries (Lithuania), and they do use abacuses to tote up lunches. Nothing huge about that; it's not done everywhere, but if that's how the lunch lady wants to operate and it works, more power to her.

I think it was a mistake to consider them behind because they mix new technology and old. All these discussions about the failure of our schools... maybe it would be better to find a good mix.

why can't both be true? That Obama is better than the Republican alternative, and that he has hit a new low in the presidency?

Let's consider previous presidents: Can anyone argue against Reagan>GHWB>WJC>GWB>BO?

But now look where our biggest unexpected steps down were: GWB (whole new department of Terrorism, 2 wars) and GHWB (recession crash).

Not to cherrypick, I'd argue you can go back further than that.

And that isn't that Republican declared principles are wrong -- I agree with some of them them -- but the Republicans do more damage at once, given the same conditions.

But for those who want to argue that Barak's damage is worse than any, yes, I'd agree.

umm, the hard hat protects you from the idiot who left his tape measure on the I beam you're guiding.

Nonsense. The founding Fathers were avid trekkie fans. Subspace Communicators (frequency shifting cell phones) they understood. Andeif we had developed phasers instead of AK-47s, they would have had a handle on that too.

Two birds, one stone, ten mice, one cat, one bell.

Not fired. Quarantined. as is the case with the whole city. They need to take a one-month break, with robotic Amazon food and TP delivery on call.

Of those 80 people, how many do you think work at the lochal grocery store, or a fast food restaurant? How many would be permitted to take time off for minor cold symptoms? How many could afford to do so?

okay, first: they HAVEN'T identified the length or method of transmissability, because it keeps spreading by surprise.

second: we know that in Africa they have missed many cases. Therefore, 7000 actual cases would not be far off.

Third, the world population is 7 million, so there are 2^20 doublings (at 23 days each) between now and total infection, at the current rate.

Fourth, the US population, including illegals, is about 350 million. So by the math, you might guess that there was 350 cases in the US, but the actual rate of spread is probably initially faster than a 23-day doubling, but slower to enter the country. So a reasonable guestimate is that we might have 120 cases, about a third of 350, but with Dallas/CDC response, we'll rapidly catch that 350 number.

In line with that, I'd estimate that in any state that has a lot of human commerce with Dallas (including Louisiana, Virginia, Oklahoma, and California), you could estimate the number of cases by dividing the state population by 3 million, more or less.

In other words, we're in deep trouble already.

nobody bothered to tell you? There's an app for that, you know.

Third time's the charm: trying to come up with something you can just click-and-read:

This one's in html:

http://file.scirp.org/Html/1-7...

whoops, forgot there's stuff on arxiv: just read this one:

http://arxiv.org/abs/0708.1008

sorry, I forgot about this arxiv article:

http://arxiv.org/abs/0708.1008

No, the science isn't settled.

http://www.worldcat.org/title/...

But the metric being wrong means that black holes fail to satisfy conservation of energy. Assume that conservation of energy is satisfied and fix the metric -- you'll find that a cross term was dropped -- and it all works out.

there are errors in the standard equations, such that the lagrangian breaks down there, because the standard equations do not properly account for energy conservation.

http://www.worldcat.org/title/...

Fix your metric, and it comes out correctly. And black holes then do mathe|atically exist.