X iv :q ua nt -p h/ 01 04 07 8v 1 1 6 A pr 2 00 1 Time Interval Operators M. Ruzzi Departamento de F́ısica Universidade Federal de Santa Catarina 88040-900 Florianópolis Santa Catarina – Brazil D. Galetti Instituto de F́ısica Teórica Universidade Estadual Paulista Rua Pamplona 145 01405-900 São Paulo – SP – Brazil In this work we will advance farther along a line previously developed concerning o...

Data mining can be used to extensively automate the data analysis process. Techniques for mining interval time series, however, have not been considered. Such time series are common in many applications. In this paper, we investigate mining techniques for such time series. Specifically, we propose a technique to discover temporal containment relationships. An item A is said to contain an item B...

A method of measuring time intervals by a single observer proposed by Crowell[3] is extended to the more general case when the events separated by the time interval take place at two points characterized by the same y=y' space coordinates. We show that time dilation and time contraction can take place or even an inversion in the time succession can be detected.

Background: Recently, it has been found that exposure of sperm to PVP may cause submicroscopic changes in sperm structure and the sperm nucleus. The PVPinduced nuclear damage may have been due to breakdown of sperm membranes. Consequently, it is probable that exposure of sperm to PVP may impair embryo development. There are apparently no detailed reports regarding the specific effects of PVP on...