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Graphs are frequently rummage-sale to typical such effects as path linkages and communication networks, and several scientific questions have ascended from altered occurrences of the demand of what is an ideal location for a competence in a graph. In virtually all circumstances the category of capability to be established is one for which a “crucial” locality is optimum. The K-epicenter problem is...
Twitter is an extremely popular social networking platform. Most Twitter users do not disclose their locations due to privacy concerns. Although inferring the location of an individual Twitter user has been extensively studied, it is still missing to effectively find the majority of the users in a specific geographical area without scanning the whole Twittersphere, and obtaining these users will result...
The operator diversity of different wireless and cellular networks integrated by IP-based networks does not imply independencies in the respective access networks. We have used incident and change records covering more than 1000 days from a GSM/UMTS network operator. Service failures vs. population density and time periodicity of failures have been studied. Our results indicate higher failure intensity...
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