Video applications are characterized by their increased requirements for huge storage spaces and timing synchronization. Video data storage is a critical issue due to the so-called I/O bottleneck problem in relation to the quality of service while accessing video applications. The main contribution of the paper is that it considers video data dependencies, access frequencies and timing constrai...

This paper considers the problem of parameter estimation in a model for a continuous response variable y when an important ordinal explanatory variable x is missing for a large proportion of the sample. Nonmissingness of x, or sample selection, is correlated with the response variable and/or with the unobserved values the ordinal explanatory variable takes when missing. We suggest solving the e...

The π-calculus with data terms (πT) extends the pure π-calculus by data constructors and destructors and allows data to be transmitted between agents. It has long been known how to encode such data types in π, but until now it has been open how to make the encoding fully abstract, meaning that two encodings (in π) are semantically equivalent precisely when the original πT agents are semanticall...