We introduce the concept of a (p; d)-divisible problem, where p reeects the number of processors and d the number of communication phases of a parallel algorithm solving the problem. We call problems that are recursively (n ; O(1))-divisible in a work-optimal way with 0 < < 1 ideally divisible and give motivation drawn from parallel computing for the relevance of that concept. We show that seve...

This short paper gives an introduction into electronic product catalogs and classification systems such as eCl@ss or UN/SPSC used in this domain. The role of classification systems to foster interoperability of catalog based enterprise systems is explained as well as problems that occur. Afterwards an approach is presented that aims in compensating these problems with the help of a mediating sy...

Technical limitations in image capturing usually impose defective, such as contrast degradation. There are different approaches to improve the contrast of an image. Among the exiting approaches, un-sharp masking is a popular method due to its simplicity in implementation and computation. There is an important parameter in un-sharp masking, named gain factor, which affects the quality of the enh...