The metron model. Towards a unified deterministic theory of fields and   particles
  A conceptual summary is given of a deterministic unified field and particle theory (the metron model) developed in more mathematical detail in a four-part paper published in Physics Essays (1996/97). The model is developed from Einsteins vacuum gravitational equations, Ricci tensor $R_{LM}=0$, in a higher dimensional space. It is postulated that the equations support soliton-type solutions (metrons) which reproduce all the basic field equations of quantum field theory, including not only the Maxwell-Dirac-Einstein system, but also all fields and symmetries of the Standard Model. Bell's theorem on the non-existence of hidden-variable models of quantum phenomena is circumvented through the time-reversal symmetry of all interactions on microphysical scales. The model, when completed, should yield all particle properties and universal physical constants from first principles. 
Klaus Hasselmann