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Efficient implementation of anisotropic three dimensional boundary-integral equation stress analysis (1978)

Wilson, R. B. ; Cruse, T. A.

Chichester [u.a.] : Wiley-Blackwell

International Journal for Numerical Methods in Engineering 12 (1978), S. 1383-1397

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ISSN: 0029-5981

Keywords: Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mathematics , Technology

Notes: The boundary-integral equation medthod is particularly well suited for solution of stress concentration and elastic fracture mechanics problems. The method was not previously applicable to anisotropic three dimensional problems because no efficient technique existed for calculation of the required point load solution for an infinite body. A technique has been developed to evaluate numerically the anisotropic point load soultions, and used to generate data bases for various materials. An intrpolation technique is used to evaluate the point load solutions efficiently within a higher order boundary-intgral equation code. The effectiveness of the technique is verified by solution of problems involving both uniaxial stress states and stress concentrations.

Additional Material: 4 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/nme.1620120907

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Glutamate uptake after stimulation-induced depletion of vesicle numbers in neuromuscular junctions of Locusta migratoria L. (1979)

Botham, R. P. ; Beadle, D. J. ; Hart, R. J. ; [et al.]

Springer

Cell & tissue research 203 (1979), S. 379-386

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ISSN: 1432-0878

Keywords: Neuromuscular junctions (Insects) ; Glutamate ; Electron microscopic autoradiography

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Medicine

Notes: Summary The distribution of radioactivity at branches and terminals of the fast axon in extensor tibiae muscle incubated in the radiolabelled putative neurotransmitter L-glutamate was determined by electron microscopic autoradiography. Quantitative analysis of the distribution of silver grains at the axon branches and terminals in preparations stimulated at a low frequency shows that most of the radioactivity is present in the glial cells. In preparations stimulated to the point of fatigue substantial radioactivity is present in both the glial cells and the axoplasm of the terminals. It is suggested that the uptake of L-glutamate into the axoplasm of the terminals is correlated with the depletion and recovery of vesicle numbers after stimulation.