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I am working on some boundary integral equation formulation and I am currently stuck with some mathematics. I wish anyone can help me out with this. 

I have an anisotropic (sometimes called generalized) biharmonic differential operator which  takes the form

L = k11 D1^4 +  k12 D1^2 D2^2 + k22 D2^4 

where D1 = d/dx, D2 = d/dy, my problem is two dimensional.

I need to find a fundamental solution (Green's function) for this operator, that is 

L(u) = -delta

where delta is Dirac delta function.

what are the books/papers that give the basic idea about dislocation-crystal plasticity theory?

Dear Colleagues：

I am very happy to let you know that our innovation of material like snail shell has been selected to be presented at EXPO 2010 in Shanghai at Youth Innovation Center (中国2010年上海世博会全球青年创新之旅).

I am working on an analytical solution for a  crack propagation  problem in a porous media using complex variable methods. Does anybody know some good references?

Graphene edges, analogous to the structure of nanotubes, can significantly influence the overall electronic and magnetic properties of graphene nanostructures, and thus have become important issues in graphene research, especially for electronic applications. In this recent paper published on PRL, we reported that the free folding of suspended graphene sheets by random mechanical stimulation has preferred folding directions.

Professor Wolfgang Knauss, of the California Institute of Technology, is selected to receive the 2010 Timoshenko Medal.