In this paper, we propose a privacy model that offers trajectory privacy to the requesters of Location-Based Services (LBSs), by utilizing an underlying network of user movement. The privacy model has been implemented as a framework that (i) reconstructs the user movement from a series of independent location updates, (ii) identifies routes where user privacy is at risk, and (iii) anonymizes on...

Large-scale corpus development demands substantial infrastructure. As part of this infrastructure, the Linguistic Data Consortium (LDC) has adopted the Annotation Graph Toolkit (AGTK) as a primary resource for annotation tool development. This paper reports on LDC’s experiences using AGTK to develop and implement highly customized annotation tools for a variety of large-scale corpus creation ef...

Experimental investigations of spatiotemporal algorithms and data structures demand for generators that produce realistic data sets. Especially Location-Based Services (LBS) require the simulation of traffic. In this case, the data sets consist of objects that move within a given infrastructure. In this paper, two different approaches—the Network-based Generator and the City Simulator—are revie...

Moving objects databases has become an intensive field of research in the recent years with many applications ranging from location-based services, traffic monitoring, fleet management, etc. Most of the works in the literature assume free development of the movement in the 2dimensional space. In some cases, the objects move within spatially embedded networks, e.g. vehicles in highways and train...

This paper describes three fundamental pitfalls or caveats of empirical modeling of land-use decision making in agent-based models for land-use/cover change. A case study in the villages of Jambi Province (Sumatra), Indonesia, is presented to demonstrate the construction of empirical decision-making models using utility functions while taking into account these caveats. Incorporating the decisi...

Telecommunication companies generate a tremendous amount of data. These data include call detail data, which describes the calls that traverse the telecommunication networks, network data, which describes the state of the hardware and software components in the network, and customer data, which describes the telecommunication customers. This chapter describes how data mining can be used to unco...

In this paper a novel approach to metadata representation for semantic-based multimedia security and management is proposed. This approach is based on semantically meaningful object segmentation and digital data hiding to facilitate image indexing as well as identification for dedicated image databases. An image is considered as a collection of the regions that correspond to objects, where thes...

The computer-based simulation of military tactics has largely involved the use of platform-dependent scripting resulting in behaviour that is limited, and difficult to debug and reuse. The Tactics Development Framework (TDF) addresses these shortcomings by providing design-level support for tactics modelling. Its integration with VBS3 is reported here.

Knowledge workers often deal with multiple sources of data when acquiring information for decision making. Multiple data sources are valuable for knowledge creation, but deciding how to integrate and analyze these different data sources is difficult. The data acquisition process and the task of correctly combining and manipulating data these data in the “information supply chain” have challenge...

At present, the mediator/wrapper integration methods are widely used in ontology based data integration because they solve the data update problems of data warehouse method. The key of this method is building of mapping from the global ontology in mediator to the local ontology in wrapper. This article analyzes the general mapping methods and designs a SPARQL query driven Global Local as View (...