Seriation, i.e., finding a suitable linear order for a set of objects given data and a loss or merit function, is a basic problem in data analysis. Caused by the problem's combinatorial nature, it is hard to solve for all but very small sets. Nevertheless, both exact solution methods and...

Purpose – This study focuses on the emotional aspects of destinations and employs two different scales for capturing the affective component of city destination image. The aim of this paper is not only to measure the emotions assigned to different European cities, but also to compare these two...

The Push to Talk (PTT) technology has been available for several years. Recently, new specifications and technical innovations based on Internet Protocols utilizing standard cellular packet data bearers have been introduced. This new approach makes Push to Talk a standard service on any cellular...