As governments increasingly deliver services over the Internet, the opportunities for monitoring and surveillance of society increase. In public services to support the vulnerable, such as welfare, monitoring and surveillance functionality is often regarded by system designers as important components in defences against fraud and system misuse. However, the responses from the participants in th...

Background and aims The goal of the present study was to create a short ProblematicSeries Watching Scale (PSWS). Methods On the basis of the six components model of Griffiths ( 2005 ), six items were identifiedcovering all components of problematic series watching. Confirmatoryfactor analyses were carried out on two independent samples (N1  = 366, N2  = 752). Results The PSWS has appropriate fa...

Travelling waves are a feature of many spatio-temporal series. The use of single side band filtering and the complex singular value decomposition to isolate such waves is described. As with other applications of the singular value decomposition, such as principal components, the results can be difficult to interpret. In the case of travelling waves, however, a dynamic graphical display using co...