Investigate of the influence of pin deviation on the biomechanical environment of fixator-bone system by finite element method

Unilateral external fixators are widely used in orthopedics to stabilize fractured bones and in the treatment of limb deformities. Vivo mechanical environment inside and around the fixator may influence the healing of fractured bone. Due to the existence of pin deviation may affect biomechanical environment of callus in the fracture gap. Finite element analysis was used to investigating stress and deformation of fixator-bone system under axial load, torsional load and bending load, comparing the biomechanical properties of two fixator structures: the one has pin deviation angle, the other has no pin deviation angle. These results reveal that the existence of pin deviation would affect the biomechanical environment of fractured bone. When fixator-bone system under three kinds of load, the stress and deformation of fixator-bone system were greater than that of fixator-bone system without pin deviation. This work provides orthopedics doctor useful information to predict the micromovements of fixator-bone system

BENEFIT AUDIT OF R&D INVESTMENT MANAGEMENT

Long time before , it is mostly blank about study of Benefit Audit Of R&D Investment Management for R&D incertitude of active in my country. This article be discuss by benefit audit of R&D investment management form three aspect, namely it is about testing basic Assumptions 、measuring the cost of nonconformance and analyzing the complete colligate of R&D investment management .That is study for change of lag estate of R&D investment management in my country almost corporation. Key words: R&D, Investment Management, Benefit, Audi

The semi-leptonic form factors of Λb→Λc\Lambda_{b}\to\Lambda_{c} and Ξb→Ξc\Xi_{b}\to\Xi_{c} in QCD sum rules

In this work, the full leading order results of the form factors for $\Xi_{b}\to\Xi_{c}$ and $\Lambda_{b}\to\Lambda_{c}$ are obtained in QCD sum rules. Contributions from up to dim-5 have been considered. For completeness, we also study the two-point correlation function to obtain the pole residues of $\Xi_{Q}$ and $\Lambda_{Q}$, and higher accuracy is achieved. For the three-point correlation function, since stable Borel regions can not be found, about $20\%$ uncertainties are introduced for the form factors of $\Xi_{b}\to\Xi_{c}$ and $\Lambda_{b}\to\Lambda_{c}$. Our results for the form factors are consistent with those of the Lattice QCD within errors.Comment: 17 pages, 5 figure

(E)-N′-[(E)-3-Phenyl­allyl­idene]benzo­hydrazide

In the title mol­ecule, C16H14N2O, the dihedral angle between the two phenyl rings is 23.5 (6)°. In the crystal, N—H—O hydrogen bonds link mol­ecules into chains running along the a axis