Inverse Dirichlet to Neumann problem for nodal curves
  This paper proposes direct and inverse results for the Dirichlet and Dirichlet to Neumann problems for complex curves with nodal type singularities. As an application, we give a method to reconstruct the conformal structure of a compact surface of the standard three dimensional euclidean space with constant scalar conductivity from electrical current measurements in a neighborhood of one of its points. 
Gennadi Henkin and Vincent Michel
math.CV