Carlos E Jimenez, Agusti Solanas, Francisco Falcone

Computer 47 (10), 22-24

Description: As technological advances in data gathering, processing, and management continue, our ability to move from an information society to a "smart" society will increasingly rely on improvements and expansion in technical, organizational, and other aspects of e-government interoperability. The first Web extra at is a video clip in which guest editor Francisco Falcone expands on the opportunities and challenges of e-government operability. The second Web extra at is a video clip in which guest editor Carlos E. Jiménez speaks in Spanish about the opportunities and challenges of e-government operability.

Fran Casino, Leyre Azpilicueta, Peio Lopez-Iturri, Erik Aguirre, Francisco Falcone, Agusti Solanas

IEEE Antennas and Wireless Propagation Letters 16, 780-783

Description: Simulation techniques based on deterministic methods such as ray tracing and ray launching are widely used to perform radioplanning tasks. However, the quality of the simulations depends on the number of rays and the angular resolution. The computational cost of these simulations in high definition prevents their use in complex environment, and their low-definition counterparts are used instead. In this letter, we propose a technique based on collaborative filtering to lessen the poor-quality problems of low-definition simulations. We show that our approach obtains results very similar to those of high definition in much less time. Also, we compare our approach to other well-known techniques and show that it performs better in terms of accuracy and precision. The use of combined deterministic/collaborative filtering techniques allows the estimation of radioplanning tasks in large, complex scenarios with a potentially large amount of transceivers.

Agusti Solanas, Antoni Martinez-Balleste, Pablo A Perez-Martinez, Albert Fernandez de la Pena, Javier Ramos

IEEE Journal on Selected Areas in Communications 31 (9), 19-27

Description: Age-related diseases are becoming more prominent due to life expectancy increase in developed countries. Mild cog- nitive impairment and several types of dementia like Alzheimer’s disease are gaining importance both socially and economically. Patients suffering from these diseases have different degrees of autonomy and, thus, different needs. Often, relatives or friends take care of those patients. However, during the first stages of the disease, they still have a high degree of autonomy and frown on the supervision of others. Despite their autonomy, patients could get lost and disoriented. Rapidly determining the location of a lost patient is paramount to reduce the risk of suffering serious injuries. Current solutions to this problem are based on the continuous monitoring of the patient. Such continuous control might be seen by most people as a privacy invasion, and it may discourage patients from using these solutions. In this article we present the concept of m-Carer as a smart mobile device able to privately monitor the movements of patients having diverse degrees of mobility and autonomy. After justifying the need for privacy-aware m-carers due to social and economical reasons, we propose a complete architecture aimed at fulfilling the needs of patients, relatives and healthcare services. Moreover, we show a real implementation of our proposal so as to confirm that it is technically sound and feasible.

Constantinos Patsakis, Paul Laird, Michael Clear, Mélanie Bouroche, Agusti Solanas

Computer 48 (1), 52-58

Description: Sharing data via information and communications technology is a fundamental goal of e-government, but data fusion and data mining could reveal sensitive personal information. A proposed cryptographic protocol guarantees citizens' privacy through data aggregation and fosters e-participation in a scalable and interoperable way. The Web extra at is an audio recording of Computer magazine Editor in Chief Sumi Helal interviewing Constantinos Patsakis about a cryptographic protocol that guarantees citizens privacy through data aggregation and fosters e-participation in a scalable and interoperable way.

Agusti Solanas, Antoni Martinez-Balleste, Josep M Mateo-Sanz

IEEE Transactions on Information Forensics and Security 8 (6), 901-910

Description: In this paper, we present the concept of double-phase microaggregation as an improvement of classical microaggregation for the protection of privacy in distributed scenarios without fully trusted parties. We apply this new concept in the context of mobile health and we show that a distributed architecture consisting of patients and several intermediate entities can apply it to protect the privacy of patients, whose data are released to third parties for secondary use. After recalling some fundamental concepts of statistical disclosure control and microaggregation, we detail the distributed architecture that allows the private gathering, storage, and sharing of biomedical data. We show that double-phase multivariate microaggregation properly fits the needs for privacy preservation of biomedical data in the distributed context of mobile health. Moreover, we show that double-phase microaggregation performs similarly to classical microaggregation in terms of information loss, disclosure risk, and correlation preservation, while avoiding the limitations of a centralized approach.

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