psa is a 33-kda serine protease that is produced predominantly by prostate epithelium. however, it has been shown that about 30-40% of female breast tumors produce psa and its production is associated with the presence of estrogen and progesterone receptors. we have now developed a new tissue culture system to study psa production in breast cancer and its association with prognostic factors suc...

Fig. 1. The digital two-pair. Abstracr -A general theorem is developed for the degree reduction of a bounded real (BR) digital filter transfer function, and is related to the extraction of a digital lossless two-pair from a BR function in such a manner that the remainder function is reduced order BR. The theorem finds applications in the synthesis of digital filter transfer functions in the for...

We initiate a study of homeomorphisms f with constant principal strains (cps) between smoothly bounded planar domains D, D′. An initial result shows that in order for there to be such a mapping of a given Jordan domainD ontoD′, a certain condition of an isoperimetric nature must be satisfied by the latter. Thereafter, we establish the fundamental fact that principal strain lines (characteristic...

Melter, R.A., I. Stojmenovii and J. Zuni6, A new characterization of digital lines by least square fits, Pattern Recognition Letters 14 (1993) 83 88. In this paper we prove that digital line segments and their least square line fits are in one-to-one correspondence and give a new simple representation (xr,n,bo,br) of a digital line segment, where x, and n are the x-coordinate of the left endpoi...