Rubidium acid phthalate (RAP) is an ionic organic polar crys-tal. In this paper, the experimental studies of its dielectric property, DCconductivity, P-E curve and transmission are reported.

This paper describes the mathematics base of algebraic geometry and ECC. It also discusses the elliptic curve discrete logarithm problem (ECDLP) and the security applications of ECC on E-commerce.

Results: Determine the end-point of titration by sudden potential change of the indicatory electrode (use E-V curve method).