What Have We Learned?

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How I spent my vacation

Posted by Tony Padegimas on March 22, 2011

I took some vacation to coincide with the kid’s spring break, and to get some work done on the house (still hail damaged) while the weather is good.

If you remove the ugly siding from my house, the turquoise cinderblock beneath  is even worse. BUT my backyard is now a more organized landfill with my new shed. If you build a pre-fab metal shed, you have to get it square and level, or the holes won’t line up. But after 8 hours, you really stop caring and just screw into the metal wherever you have to. It’s a shed. It keeps the rain off the lawnmower and the sun off of the plastic sawhorses. Relax.

That said, beer does not make the roof assembly go any easier.

I am studying for my ETCP rigging certification. Really. So I’ve been covering basic force calculation and remedial pythagoran theorems. to wit:

If you have a weight (some big stupid moving light) hung from a truss supported by two motors, and you want to know the weight held by a particular motor, the formula is:

F= D2/span x Wt

Where F is the force

D2 is the distance past centerline (or in this case, the point the weight hangs from)  opposite from the motor

span is the entire span between the motors

and Wt is the weight of the thing.

I won’t get into the algebra and the special cases and such, but a few things to remember:

This formula also works for bridles

Remember to include the weight for everything in the air

When figuring bridles, its helpful to know that they reduce themselves to triangles, and all sorts of remedial geometry applies.

When calculating a circumference, PIxDiamter = (2PI)radius. This isn’t a secret, I just never realized it.

For the writers:

Duotrope’s Digest lists “over 3325 current Fiction and Poetry publications” online and free and search-able.

One writer’s encounter with “gastronaughts” and blood pork.

And fat may help us live forever after all. This National Geographic article splits the difference between scientific journal articles and pop-news coverage.

(These topics all came up at our Thursday Night Writer’s Group)

Did I post this already?: Mike Brotherton’s hard SF resource page

And finally,

Neil deGrasse Tyson explains why religious fundamentalism is the opposite of progress.

You Tube teaser – if you don’t have time for the full talk:

Now you know

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