Sergio Alvarez-Napagao

Dr. Sergio Alvarez-Napagao

orcid

Research Focus & Metrics

Academic Career Length

21Years (2006-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 November 2006 in IEEE Intelligent Systems
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Journal Article
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TKTamas Kifor
Tamas Kifor
LVLászló Varga
László Varga
JVJavier Vazquez-Salceda
Javier Vazquez-Salceda
SASergio Alvarez-Napagao
Sergio Alvarez-Napagao
SWSteven Willmott
Steven Willmott
LMLuc Moreau
Luc Moreau
People are increasingly cooperating to share electronic information and techniques throughout various industries. In healthcare applications, data (a single patient's healthcare history), workflow (procedures carried out on that patient), and logs (a recording of meaningful procedural events) are often distributed among several heterogeneous and autonomous information systems. Understanding a patient's treatment history can help healthcare providers make treatment decisions. Provenance-aware applications can facilitate this process by tracing events, event dependencies, and provider decisions across various healthcare institutions

Verified
Journal Article
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RARaquel Pérez Arnal
Raquel Pérez Arnal
DCDavid Conesa
David Conesa
SASergio Alvarez-Napagao
Sergio Alvarez-Napagao
TSToyotaro Suzumura
Toyotaro Suzumura
MCMartí Català
Martí Català
DGDario Garcia-Gasulla
Dario Garcia-Gasulla
The COVID-19 pandemic is changing the world in unprecedented and unpredictable ways. Human mobility, being the greatest facilitator for the spread of the virus, is at the epicenter of this change. In order to study mobility under COVID-19, to evaluate the efficiency of mobility restriction policies, and to facilitate a better response to future crisis, we need to understand all possible mobility data sources at our disposal. Our work studies private mobility sources, gathered from mobile-phones and released by large technological companies. These data are of special interest because, unlike most public sources, it is focused on individuals rather than on transportation means. Furthermore, the sample of society they cover is large and representative. On the other hand, these data are not directly accessible for anonymity reasons. Thus, properly interpreting its patterns demands caution. Aware of that, we explore the behavior and inter-relations of private sources of mobility data in the context of Spain. This country represents a good experimental setting due to both its large and fast pandemic peak and its implementation of a sustained, generalized lockdown. Our work illustrates how a direct and naive comparison between sources can be misleading, as certain days (e.g., Sundays) exhibit a directly adverse behavior. After understanding their particularities, we find them to be partially correlated and, what is more important, complementary under a proper interpretation. Finally, we confirm that mobile-data can be used to evaluate the efficiency of implemented policies, detect changes in mobility trends, and provide insights into what new normality means in Spain.

2 February 2024 in Systems
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Journal Article
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EAEnrico Alberti
Enrico Alberti
SASergio Alvarez-Napagao
Sergio Alvarez-Napagao
VAVictor Anaya
Victor Anaya
MBMarta Barroso
Marta Barroso
CBCristian Barrué
Cristian Barrué
SWStefan Walter
Stefan Walter
The advancements in human-centered artificial intelligence (HCAI) systems for Industry 5.0 is a new phase of industrialization that places the worker at the center of the production process and uses new technologies to increase prosperity beyond jobs and growth. HCAI presents new objectives that were unreachable by either humans or machines alone, but this also comes with a new set of challenges. Our proposed method accomplishes this through the knowlEdge architecture, which enables human operators to implement AI solutions using a zero-touch framework. It relies on containerized AI model training and execution, supported by a robust data pipeline and rounded off with human feedback and evaluation interfaces. The result is a platform built from a number of components, spanning all major areas of the AI lifecycle. We outline both the architectural concepts and implementation guidelines and explain how they advance HCAI systems and Industry 5.0. In this article, we address the problems we encountered while implementing the ideas within the edge-to-cloud continuum. Further improvements to our approach may enhance the use of AI in Industry 5.0 and strengthen trust in AI systems.

20 July 2015 in Journal of Experimental & Theoretical Artificial Intelligence
Verified
Journal Article
Open access
JBJavier Bejar
Javier Bejar
SASergio Alvarez-Napagao
Sergio Alvarez-Napagao
DGD. García
D. García
IGI. Gómez
I. Gómez
LOL. Oliva
L. Oliva
JVJ. Vázquez-Salceda
J. Vázquez-Salceda
Location-based social networks (LBSNs) such as Twitter or Instagram are a good source for user spatio-temporal behaviour. These networks collect data from users in such a way that they can be seen as a set of collective and distributed sensors of a geographical area. A low rate sampling of user's location information can be obtained during large intervals of time that can be used to discover complex patterns, including mobility profiles, points of interest or unusual events. These patterns can be used as the elements of a knowledge base for different applications in different domains such as mobility route planning, touristic recommendation systems or city planning. The aim of this paper is twofold, first to analyse the frequent spatio-temporal patterns that users share when living and visiting a city. This behaviour is studied by means of frequent itemsets algorithms in order to establish some associations among visits that can be interpreted as interesting routes or spatio-temporal connections. Second, to analyse how the spatio-temporal behaviour of a large number of users can be segmented in different profiles. These behavioural profiles are obtained by means of clustering algorithms that show the different patterns of behaviour of visitors and citizens. The data analysed were obtained from the public data feeds of Twitter and Instagram within an area surrounding the cities of Barcelona and Milan for a period of several months. The analysis of these data shows that these kinds of algorithms can be successfully applied to data from any city (or general area) to discover useful patterns that can be interpreted on terms of singular places and areas and their temporal relationships.

15 April 2024 in Sustainable Cities and Society
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Journal Article
Open access
PLPol Vidal Lamolla
Pol Vidal Lamolla
MMMaría Molinos-Senante
María Molinos-Senante
LFLuis Javier Oliva Felipe
Luis Javier Oliva Felipe
SASergio Alvarez-Napagao
Sergio Alvarez-Napagao
UCUlises Cortés
Ulises Cortés
MPManel Poch
Manel Poch

1 January 2011 in Lecture Notes in Computer Science
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Book Chapter
Closed access
PDF file
SASergio Alvarez-Napagao
Sergio Alvarez-Napagao
HAHuib Aldewereld
Huib Aldewereld
JVJavier Vázquez-Salceda
Javier Vázquez-Salceda
FDFrank Dignum
Frank Dignum