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Renegade:
A Relativity teaching tool: Gravity Visualized - YouTube

-IainB (November 10, 2015, 08:46 PM)
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That's funny. I just watched that yesterday. :D  :Thmbsup:

IainB:
As a keen cyclist with children, I had always been in favour of the New Zealand law making it compulsory to wear a bicycle helmet. However, the outcome of that law is apparently not what one might have intuitively expected - according to a 2012 report from the NZ Medical Journal. I'd not seen it before. Very interesting statistical analysis.
Evaluation of New Zealand’s bicycle helmet law - New Zealand Medical Journal
-IainB (January 25, 2015, 10:35 AM)
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Study: The Latest Evidence That Bike Helmet Laws Don't Help Rider Safety - CityLab
Public health might be better off if cities focused on building better bike lanes instead.
    Eric Jaffe @e_jaffe Nov 10, 2015 Comments

It goes against all common sense, even as it’s become increasingly clear to anyone swayed by the science: bike helmet laws don’t seem to improve rider safety.

The latest evidence comes via a new study, published in BMJ Open, conducted by a group of Canada-based public health scholars. Kay Teschke of the University of British Columbia, in Vancouver, and collaborators gathered Canadian data on bicycle use, cycle-related hospitalization, and a number of other variables including helmet legislation in 11 jurisdictions between 2006 and 2011. Some areas had helmet laws over this period, while others did not.

Teschke and company found two factors to be statistically linked with bike hospitalizations. One was gender. For all types of injuries, women experienced “substantially lower” hospitalization rates than men did. This finding—in line with previous reports—could be the result of women being less likely to ride on major city streets that don’t have separated bike lanes. Another possible explanation offered in the past is that women tend to ride slower than men do.

The second main variable related to bike hospitalizations was local cycling mode share. For traffic-related injuries in particular, areas with higher shares of bike riders among all travelers had lower hospitalization rates than other regions, a finding that held for all bodily injuries as well as those to the head or brain. In other words, when more people ride bikes, fewer riders get injured—a clear sign that cyclists experience safety in numbers.
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Why It's Safer to Walk and Bike Where More People Walk and Bike
Drivers pay more attention.
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What the researchers failed to find was any connection between helmet laws and bike-related hospitalization rates. That held true whether they looked at all cycling injuries or just traffic-specific injuries. Surprisingly, it also held true when they narrowed in on body parts protected by a helmet: the brain, head, scalp, skull, face, even neck. Since helmet laws don’t necessarily mean compliance, they looked at helmet usage, too, and once again found nothing.

The point is not that helmets do nothing or that you shouldn’t wear them. If you fall off your bike and hit your head, it’s obviously much better to have a helmet on. At a personal level, if that’s what it takes to get you riding, by all means, helmet up. But at the local government level, it’s time to recognize that other safety measures have far greater public health benefits—in particular, well-designed infrastructure that separates riders from general traffic.

Here’s Teschke, writing to CityLab via email, on how there’s sufficient evidence out there by now “to shift our focus” from bike laws to bike lanes:

    It has dual advantages, both reducing injuries and encouraging cycling, an important public health goal of its own given the physical activity and environmental benefits. Comparisons between North America and the Netherlands or Denmark have long suggested that their route design focus is better at welcoming cycling and achieving lower injury rates. Many were concerned that Dutch and Danish infrastructure wouldn't have the same impact here, but there is more and more research in North America showing that it does.

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Arizona Hot:
Interesting "stuff"

Christina Does It All

Arizona Hot:
 

Awesome Star Wars Easter Eggs in Other Films - YouTube

View app--pick up car from vending machine

Carvana – Car Vending Machine - YouTube

IainB:
I have always been interested in calculators. I was intrigued when I found this article on an emulator for the Sinclair Scientific calculator: Reversing Sinclair's amazing 1974 calculator hack - half the ROM of the HP-35, and I finally understood why its calculation of Pi was incorrect - the constraints of its el cheapo design meant that it only had three decimal places of accuracy at best!

I found it as a link in this great GitHub list of Emulators written in JavaScript  :Thmbsup:

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