Increased vulnerability to predation results in young individuals of many species experiencing higher pressure than adults. Consequently, the production antipredator-related calls by can differ from that same vocalizations given Sentinel behaviour is a coordinated vigilance behaviour, where one individual climbs on an elevated position and scans surroundings for predators, while rest group main...

Two approaches, resource-oriented and constraint-oriented, for structuring telephone systems specifications, are presented. Both approaches express behaviour by collections of communicating processes, using the language LOTOS. However, requirements are distributed differently among processes. Examples are taken from specifications of telephone systems, first basic, and then with features. The f...

In the competitive telecommunications market, the information that the mobile telecom operators can obtain by regularly analysing their massive stored call logs, is of great interest. Although the data that can be extracted nowadays from mobile phones have been enriched with much information, the data solely from the call logs can give us vital information about the customers. This information ...