results daily administration of 50 mg/kg ptx (groups 1 and 2) decreased the high stress load in repairing osteotomized femurs when compared with the control group. the highest dose of ptx (200 mg/kg) significantly increased the high stress load when compared with the control group (p = 0.030), group 1 (p = 0.023), group 2 (p = 0.008), and group 3 (p = 0.010), per the lsd findings. materials and...

The production of high strength steel components with desired properties by hot stamping (also called press hardening) requires a profound knowledge and control of the forming procedures. In this way, the final part properties become predictable and adjustable on the basis of the different process parameters and their interaction. In addition to parameters of conventional cold forming, thermal ...

to compare the mechanical properties of resilon and gutta-percha cones after storing at three different temperatures.one-hundred standardized size 40/02 gutta-percha cones and 100 resilon cones were randomly divided into four groups. the first group of the materials were tested immediately after receipt as the control group. the other three were stored in their packages at -12°c, 4± 1°c and 22±...

First a general definition of reversibility is given which is in accordance with the mechanical concept of reversibility. This definition is applied to thermostatics. It is shown that the smooth curves in the space of equilibrium parameters can be approximated arbitrarily by irreversible or by almost reversible real processes. The work done during an almost reversible process is given by a Pfaf...

The susceptibility of structural concrete to early-age cracking depends on material composition, methods of processing, structural boundary conditions, and a variety of environmental factors. Computational modeling offers a means for identifying primary factors and strategies for reducing cracking potential. Herein, lattice models are shown to be adept at simulating the thermal-hygral-mechanica...

Symmetric couplings among aggregates of n chromophores increase the transfer rate of excitons by a factor n(2), a quantum-mechanical phenomenon called 'supertransfer'. In this work, we demonstrate how supertransfer effects induced by geometrical symmetries can enhance the exciton diffusion length by a factor n along cylindrically symmetric structures, consisting of arrays of rings of chromophor...

We examine the relationship between two different types of ranked data, frequencies and magnitudes. We consider data that can be sorted out either way, through numbers of occurrences or size of the measures, as it is the case, say, of moon craters, earthquakes, billionaires, etc. We indicate that these two types of distributions are functional inverses of each other, and specify this link, firs...

Colliding ice floes are often observed to form a series of interlocking fingers. We show that this striking phenomenon is not a result of some peculiar property of ice but rather a general and robust mechanical phenomenon reproducible in the laboratory with other floating materials. We determine the theoretical relationship between the width of the resulting fingers and the material's mechanica...