Monday, December 28, 2009

M One Rifle And Other Important Matters

M One Rifle by One Man Army wins the $300,000.00 Malibu Stakes at Santa Anita. I'd have been a fly on the wall to hear Doug O'Neil explaining to J. Paul Reddam how his $200,000 Smart Strike Colt was beaten lengths by the One Man Army colt. The first bred by Kingshaven, the second by Kingsway, apparently a hunter jumper farm in CA. There is hope, lol! Congrats to Bruce Headley!

straight back to business, Max Planck Institute:

transverse properties of individual collagen molecules are not known.

RR clicks dictionary--"transverse". "acting, lying or laying across". They're concerned how the individual collagen molecules "lie" within the collagen fibril. This is unknown, and so they presume a hexagonal arrangement (although looking at the Hansma images, I'm unable to see anything hexagonal. Maybe those blue blobs are more than one collagen molecule arranged six sidedly(?)













they suppose a hexagonal array of perfectly aligned cylindrical fibers(as opposed to real molecules--they are simulating) in an (isotropic) water-bone glue matrix, the "elasticity of which is due to hydrogen bonds linking collagen molecules, as well as the cross links provided by bone glue. You're getting the picture, here!

accurate estimates of the "effective properties" of this simulated "array"--"have been developed" in the year 1998, as it seems.

They seek to find out: "the transversely isotropic stiffness tensor" of the collagen-water composite. These can be evaluated by "numerical simulations" shown as equations in the Planck piece.

With the "values" or results of said equations they obtain "elastic constants" for the composite, and from this construct the "elastic stiffness tensor" of the "Homogenized collagen-water composite.

Thus, their method.

What does this produce?

It appears they find, drum roll, that strength depends (strongly) upon the "shape and volume" of the HA mineral platelets that coat the fibrils. i.e. different shapes and amounts, different strengths. Again, drum roll!!!

Training:
Mon. 12/28: we're still off due to weather. Might try a little play in deep snow in the morning.

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