NEW ESTIMATES ON VARIOUS CRITICAL UNIVERSAL QUANTITIES OF THE 3D ISING-MODEL/

We present estimates for the 3D Ising model on the cubic lastice, both regarding interface and bulk properties. We have results for the inte rface tension, in particular the amplitude sigma(0) in the critical la w sigma = sigma t(mu), and for the universal combination R- = sigma xi (2). Concerning the bulk properties, we estimate the specific heat uni versal amplitude ratio A(+)/A(-), together with the exponent alpha, th e nonsingular background of energy and specific heat at criticality, t ogether with the exponent upsilon. There are also results for the univ ersal combination f(s) xi(3), where f(s) is the singular part of the f ree energy. Details can be found in [1] (interface) and [2] (bulk).