Mahmoud Attia Sakr

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In previous work, we have proposed a tool for <i>Spatiotemporal Pattern Query</i>. It matches individual moving object trajectories against a given movement pattern. For example, it can be used to find the situations of <i>Missed Approach</i> in ATC data (Air Traffic Control systems, used for tracking the movement of aircrafts), where the landing of the(More)
In this paper, we demonstrate our results of designing and implementing spatiotemporal pattern queries. That is, one can specify temporal order constraints on the fulfillment of predicates on moving objects. Compared with other approaches, our approach is not restricted in terms of the types of moving object or the sets of predicates. Our work covers the(More)
Advances in location acquisition and mobile technologies led to the addition of the location dimension to Social Networks (SNs) and to the emergence of a newer class called Location-Based Social Networks (LBSNs). While LBSNs are richer in their model and functions than SNs, they fail so far to attract as many users as SNs. On the other hand, SNs have large(More)
Mobile devices leave a huge number of digital traces that are collected as trajectories, describing the movement of its users or a path followed by any moving object in geographical space over some period of time. However, those mobile devices provide just raw trajectories (x, y, t), ignoring information about their related contextual data, these additional(More)
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