Verruciform xanthoma (VX) is a relatively rare benign lesion and oral predominantly, which occasionally affects skin and genital mucosa. It appears as a papule or single plaque showing a verrucous or papillomatous aspect, with variable color from reddish pink to gray. In majority of oral cases, it affects gingiva and alveolar mucosa such a solitary lesion. Histopathological findings are foamy h...

In this paper the Topography Section of the University of Cagliari (Italy) presents the results of the research carried out on the Location Based Services. These are services which use the knowledge of a mobile device’s position (e. g. a mobile phone or PDA) in order to send to the user information and news.The research had the purpose of investigating some critical issues linked to the Locatio...

  Introduction Identification of the climate changes is important for understanding the paleoenvironmental characteristics. Sedimentary evidence of the closed basins can be one of the most important methods for identifying the climatic periods and changes in the sedimentary environments. Gavkhouni Playa, as the lowland of the ZayandehRud River catchment area is located in an inter-mountainous...

We propose a process algebra obtained by adapting the process algebra with continuous relative timing from Baeten and Middelburg [Process Algebra with Timing, Springer, 2002, Chap. 4] to spatially located actions. This process algebra makes it possible to deal with the behaviour of systems with a known time-dependent spatial distribution, such as protocols transmitting data via a mobile interme...

It is common for small groups to gather around visual displays of information. Imagine a team of practitioners examining a medical record or a team of executives looking at charts showing latest sales trends. My PhD research aims at supporting such collaborative work around visual displays of information. It informs the design of software to support this work and furthers our understanding of h...

We observe and report on a systematic relationship between population density and Twitter use. Number of tweets, number of users and population per unit area are related by power laws, with exponents greater than one, that are consistent with each other and across a range of spatial scales. This implies that population density can accurately predict Twitter activity. Furthermore this trend can ...

We present two novel semantics for π-calculus. The first allows one to observe on which channel a synchronization is performed, while the second allows concurrent actions, provided that they do not compete for resources. We present both a reduction and a labeled semantics, and show that they induce the same behavioral equivalence. As our main result we show that bisimilarity is a congruence for...