Publications by authors named "Agustín Zaballos"

7 Publications

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PyFF: A Fog-Based Flexible Architecture for Enabling Privacy-by-Design IoT-Based Communal Smart Environments.

Sensors (Basel) 2021 May 24;21(11). Epub 2021 May 24.

Grup de Recerca en Internet Technologies & Storage (GRITS), La Salle-Universitat Ramon Llull, C/Quatre Camins, 30, 08022 Barcelona, Spain.

The advent of the Internet of Things (IoT) and the massive growth of devices connected to the Internet are reshaping modern societies. However, human lifestyles are not evolving at the same pace as technology, which often derives into users' reluctance and aversion. Although it is essential to consider user involvement/privacy while deploying IoT devices in a human-centric environment, current IoT architecture standards tend to neglect the degree of trust that humans require to adopt these technologies on a daily basis. In this regard, this paper proposes an architecture to enable privacy-by-design with human-in-the-loop IoT environments. In this regard, it first distills two IoT use-cases with high human interaction to analyze the interactions between human beings and IoT devices in an environment which had not previously been subject to the Internet of People principles.. Leveraging the lessons learned in these use-cases, the Privacy-enabling Fog-based and Flexible (PyFF) human-centric and human-aware architecture is proposed which brings together distributed and intelligent systems are brought together. PyFF aims to maintain end-users' privacy by involving them in the whole data lifecycle, allowing them to decide which information can be monitored, where it can be computed and the appropriate feedback channels in accordance with human-in-the-loop principles.
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http://dx.doi.org/10.3390/s21113640DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8197254PMC
May 2021

A Heterogeneous Layer-Based Trustworthiness Model for Long Backhaul NVIS Challenging Networks and an IoT Telemetry Service for Antarctica.

Sensors (Basel) 2021 May 15;21(10). Epub 2021 May 15.

GRITS, Engineering Department, La Salle, Universitat Ramon Llull (URL), 08022 Barcelona, Spain.

Antarctica is a key location for many research fields. The lack of telecommunication systems that interconnect remote base camps hardens the possibility of building synergies among different polar research studies. This paper defines a network architecture to deploy a group of interconnected remote Antarctic wireless sensor networks providing an IoT telemetry service. Long backhaul NVIS links were used to interconnect remote networks. This architecture presents some properties from challenging networks that require evaluating the viability of the solution. A heterogeneous layer-based model to measure and improve the trustworthiness of the service was defined and presented. The model was validated and the trustworthiness of the system was measured using the Riverbed Model simulator.
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http://dx.doi.org/10.3390/s21103446DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8157133PMC
May 2021

An Integral Pedagogical Strategy for Teaching and Learning IoT Cybersecurity.

Sensors (Basel) 2020 Jul 17;20(14). Epub 2020 Jul 17.

Engineering Department, Universitat Ramon Llull (URL), La Salle, 08022 Barcelona, Spain.

Internet of Things (IoT) has become a fundamental content of any engineering program due to the emerging need of experts in this field. However, the complexity of technologies that interact in IoT environments and the amount of different professional profiles required to design, implement and manage IoT environments, considering cybersecurity as a must, has led to a huge challenge in the educational world. This paper proposes an integral pedagogical strategy for learning IoT cybersecurity structured in three different stages, in a higher education institution. These stages focus not only on the content about IoT and cybersecurity but also on the competencies to acquire, the most suitable learning methodologies and the expected learning outcomes. The association of these concepts in each stage is detailed. Examples of courses are explained, the related competencies and learning outcomes are specified, and the contents and methodologies to achieve the expected results are described. An analysis of student results and stakeholder evaluations is provided to verify if the pedagogical strategy proposed is suitable. Furthermore, students' feedback is included to corroborate the innovation, the suitability of the acquired skills, and the overall student satisfaction with the related courses and consequently with the proposed IoT cybersecurity pedagogical strategy.
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http://dx.doi.org/10.3390/s20143970DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7411857PMC
July 2020

A Heuristic to Create Prosumer Community Groups in the Social Internet of Energy.

Sensors (Basel) 2020 Jul 2;20(13). Epub 2020 Jul 2.

Engineering Department, Universitat Ramon Llull (URL), La Salle, 08022 Barcelona, Spain.

Contrary to the rapid evolution experienced in the last decade of Information and Communication Technologies and particularly the Internet of Things, electric power distribution systems have remained exceptionally steady for a long time. Energy users are no longer passive actors; the prosumer is expected to be the primary agent in the Future Grid. Demand Side Management refers to the management of energy production and consumption at the demand side, and there seems to be an increasing concern about the scalability of Demand Side Management services. The creation of prosumer communities leveraging the Smart Grid to improve energy production and consumption patterns has been proposed in the literature, and several works concerned with scalability of Demand Side Management services group prosumers to improve Demand Side Management services scalability. In our previous work, we coin the term Social Internet of Energy to refer to the integration between devices, prosumers and groups of prosumers via social relationships. In this work, we develop an algorithm to coordinate the different clusters we create using the clustering method by load profile compatibility (instead of similarity). Our objective is to explore the possibilities of the cluster-by-compatibility heuristic we proposed in our previous work. We perform experiments using synthetic and real datasets. Results show that we can obtain a global reduction in Peak-to-Average Ratio with datasets containing up to 200 rosumers and creating up to 6 Prosumer Community Groups, and imply that those Prosumer Community Groups can perform load rescheduling semi-autonomously and in parallel with each other.
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http://dx.doi.org/10.3390/s20133704DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7374439PMC
July 2020

Ontology-Defined Middleware for Internet of Things Architectures.

Sensors (Basel) 2019 Mar 7;19(5). Epub 2019 Mar 7.

Engineering Department, Universitat Ramon Llull (URL), La Salle, 08022 Barcelona, Spain.

The Internet of Things scenario is composed of an amalgamation of physical devices. Those physical devices are heterogeneous in their nature both in terms of communication protocols and in data exchange formats. The Web of Things emerged as a homogenization layer that uses well-established web technologies and semantic web technologies to exchange data. Therefore, the Web of Things enables such physical devices to the web, they become Web Things. Given such a massive number of services and processes that the Internet of Things/Web of Things enables, it has become almost mandatory to describe their properties and characteristics. Several web ontologies and description frameworks are devoted to that purpose. Ontologies such as SOSA/SSN or OWL-S describe the Web Things and their procedures to sense or actuate. For example, OWL-S complements SOSA/SSN in describing the procedures used for sensing/actuating. It is, however, not its scope to be specific enough to enable a computer program to interpret and execute the defined flow of control. In this work, it is our goal to investigate how we can model those procedures using web ontologies in a manner that allows us to directly deploy the procedure implementation. A prototype implementation of the results of our research is implemented along with an analysis of several use cases to show the generality of our proposal.
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http://dx.doi.org/10.3390/s19051163DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6427511PMC
March 2019

A Custom Approach for a Flexible, Real-Time and Reliable Software Defined Utility.

Sensors (Basel) 2018 Feb 28;18(3). Epub 2018 Feb 28.

Engineering Department, La Salle-Universitat Ramon Llull, 08022 Barcelona, Spain.

Information and communication technologies (ICTs) have enabled the evolution of traditional electric power distribution networks towards a new paradigm referred to as the smart grid. However, the different elements that compose the ICT plane of a smart grid are usually conceived as isolated systems that typically result in rigid hardware architectures, which are hard to interoperate, manage and adapt to new situations. In the recent years, software-defined systems that take advantage of software and high-speed data network infrastructures have emerged as a promising alternative to classic ad hoc approaches in terms of integration, automation, real-time reconfiguration and resource reusability. The purpose of this paper is to propose the usage of software-defined utilities (SDUs) to address the latent deployment and management limitations of smart grids. More specifically, the implementation of a smart grid's data storage and management system prototype by means of SDUs is introduced, which exhibits the feasibility of this alternative approach. This system features a hybrid cloud architecture able to meet the data storage requirements of electric utilities and adapt itself to their ever-evolving needs. Conducted experimentations endorse the feasibility of this solution and encourage practitioners to point their efforts in this direction.
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http://dx.doi.org/10.3390/s18030718DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5876631PMC
February 2018

Prototyping a Web-of-Energy Architecture for Smart Integration of Sensor Networks in Smart Grids Domain.

Sensors (Basel) 2018 Jan 30;18(2). Epub 2018 Jan 30.

Engineering Department, Universitat Ramon Llull (URL), La Salle, 08022 Barcelona, Spain.

Sensor networks and the Internet of Things have driven the evolution of traditional electric power distribution networks towards a new paradigm referred to as Smart Grid. However, the different elements that compose the Information and Communication Technologies (ICTs) layer of a Smart Grid are usually conceived as isolated systems that typically result in rigid hardware architectures which are hard to interoperate, manage, and to adapt to new situations. If the Smart Grid paradigm has to be presented as a solution to the demand for distributed and intelligent energy management system, it is necessary to deploy innovative IT infrastructures to support these smart functions. One of the main issues of Smart Grids is the heterogeneity of communication protocols used by the smart sensor devices that integrate them. The use of the concept of the Web of Things is proposed in this work to tackle this problem. More specifically, the implementation of a Smart Grid's Web of Things, coined as the Web of Energy is introduced. The purpose of this paper is to propose the usage of Web of Energy by means of the Actor Model paradigm to address the latent deployment and management limitations of Smart Grids. Smart Grid designers can use the Actor Model as a design model for an infrastructure that supports the intelligent functions demanded and is capable of grouping and converting the heterogeneity of traditional infrastructures into the homogeneity feature of the Web of Things. Conducted experimentations endorse the feasibility of this solution and encourage practitioners to point their efforts in this direction.
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http://dx.doi.org/10.3390/s18020400DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5855060PMC
January 2018
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