DeustoTeka Examinando por Autor "Bilbao Jayo, Aritz"

Examinando por Autor "Bilbao Jayo, Aritz"

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Addressing behavioural technologies through the human factor: a review
(Institute of Electrical and Electronics Engineers Inc., 2020-03-25) Irizar Arrieta, Ane; Gómez Carmona, Oihane; Bilbao Jayo, Aritz; Casado Mansilla, Diego; López de Ipiña González de Artaza, Diego; Almeida, Aitor
Energy-efficiency related research has reached a growing interest in recent years due to the imminent scarcity of non-renewable resources in our environment and the impending impacts their usage have on our environment. Thus, facing the reduction of energy waste and management has become a pivotal issue in our society. To cope with energy inefficiency, the scientific research community has identified the promotion of people's behaviour change as a critical field to foster environmental sustainability. However, the body of literature shows a lack of systematic methods and processes to reach a common ground when designing technology for promoting sustainable behaviour change. Therefore, this paper contributes with a thorough review and analysis of state of the art. Firstly, theoretical works related to behaviour change are collected and studied to clarify their main concepts and theories. Secondly, the different technologies, processes, methods and techniques applied in the field are reviewed to find diverse strategies in the application of the previously explained theoretical domains. Moreover, a wide range of systems developed to improve energy efficiency through human behaviour change is analysed (from augmented objects to the Internet of Things, digital applications or websites). Finally, the detected research gaps are listed to guide future research when aiming to raise the awareness of individuals through Information and Communication Technologies.
Analysing centralities for organisational role inference in online social networks
(Elsevier Ltd, 2021-03) Sánchez Corcuera, Rubén; Bilbao Jayo, Aritz; Zulaika Zurimendi, Unai; Almeida, Aitor
The intensive use of Online Social Networks (OSN) nowadays has made users expose more information without realising it. Malicious users or marketing agencies are now able to infer information that is not published on OSNs by using data from targets friends to use for their benefit. In this paper, the authors present a generalisable method capable of deducing the roles of employees of an organisation using their Twitter relationships and the features of the graph from their organisation. The authors also conduct an extensive analysis of the node centralities to study their roles in the inference of the different classes proposed. Derived from the experiments and the ablation study conducted to the centralities, the authors conclude that the latent features of the graph along with the directed relationships perform better than previously proposed methods when classifying the role of the employees of an organisation. Additionally, to evaluate the method, the authors also contribute with a new dataset consisting of three directed graphs (one for each organisation) representing the relationships between the employees obtained from Twitter.
Behavior modeling for a beacon-based indoor location system
(MDPI AG, 2021-07-15) Bilbao Jayo, Aritz; Almeida, Aitor ; Sergi, Ilaria; Montanaro, Teodoro; Fasano, Luca; Emaldi, Mikel ; Patrono, Luigi
In this work we performed a comparison between two different approaches to track a person in indoor environments using a locating system based on BLE technology with a smartphone and a smartwatch as monitoring devices. To do so, we provide the system architecture we designed and describe how the different elements of the proposed system interact with each other. Moreover, we have evaluated the system’s performance by computing the mean percentage error in the detection of the indoor position. Finally, we present a novel location prediction system based on neural embeddings, and a soft-attention mechanism, which is able to predict user’s next location with 67% accuracy.
Categorizing and assessing aspects of suicidal ideation detection approaches: a systematic review
(Elsevier B.V., 2025-07-09) Nikmehr, Golnaz; Bilbao Jayo, Aritz; Almeida, Aitor
Suicide remains a critical global issue and one of the leading causes of death worldwide. As this problem grows, the need for effective prevention strategies becomes increasingly urgent. Social networks and online platforms, such as Twitter, have emerged as spaces where people openly share their thoughts and emotions, including negative feelings, reflections on life, and even suicidal thoughts. This makes social media data an important resource for efforts to detect and reduce the risk of suicide. This systematic review examines 92 studies published between 2018 and 2024 on the detection of suicidal ideation. The studies are categorized using a multidimensional framework that considers three key aspects: the platforms used for data collection, the analytical techniques applied, and the specific features employed to identify suicidal ideation. By exploring these dimensions, the review highlights existing gaps and limitations in current methods, offering insights to guide future research and improve strategies for suicide prevention.
A comparative analysis of human behavior prediction approaches in intelligent environments
(MDPI, 2022-01-18) Almeida, Aitor; Bermejo Fernández, Unai ; Bilbao Jayo, Aritz ; Azkune Galparsoro, Gorka; Aguilera, Unai ; Emaldi, Mikel ; Dornaika, Fadi; Arganda-Carreras, Ignacio
Behavior modeling has multiple applications in the intelligent environment domain. It has been used in different tasks, such as the stratification of different pathologies, prediction of the user actions and activities, or modeling the energy usage. Specifically, behavior prediction can be used to forecast the future evolution of the users and to identify those behaviors that deviate from the expected conduct. In this paper, we propose the use of embeddings to represent the user actions, and study and compare several behavior prediction approaches. We test multiple model (LSTM, CNNs, GCNs, and transformers) architectures to ascertain the best approach to using embeddings for behavior modeling and also evaluate multiple embedding retrofitting approaches. To do so, we use the Kasteren dataset for intelligent environments, which is one of the most widely used datasets in the areas of activity recognition and behavior modeling
Embedding-based real-time change point detection with application to activity segmentation in smart home time series data
(Elsevier Ltd, 2021-12-15) Bermejo Fernández, Unai; Almeida, Aitor; Bilbao Jayo, Aritz; Azkune Galparsoro, Gorka
Human activity recognition systems are essential to enable many assistive applications. Those systems can be sensor-based or vision-based. When sensor-based systems are deployed in real environments, they must segment sensor data streams on the fly in order to extract features and recognize the ongoing activities. This segmentation can be done with different approaches. One effective approach is to employ change point detection (CPD) algorithms to detect activity transitions (i.e. determine when activities start and end). In this paper, we present a novel real-time CPD method to perform activity segmentation, where neural embeddings (vectors of continuous numbers) are used to represent sensor events. Through empirical evaluation with 3 publicly available benchmark datasets, we conclude that our method is useful for segmenting sensor data, offering significant better performance than state of the art algorithms in two of them. Besides, we propose the use of retrofitting, a graph-based technique, to adjust the embeddings and introduce expert knowledge in the activity segmentation task, showing empirically that it can improve the performance of our method using three graphs generated from two sources of information. Finally, we discuss the advantages of our approach regarding computational cost, manual effort reduction (no need of hand-crafted features) and cross-environment possibilities (transfer learning) in comparison to others
From Political Manifestos to Social Networks
(Universidad de Deusto, 2020-06-23) Bilbao Jayo, Aritz; Almeida, Aitor; Facultad de Ingeniería; Programa de Doctorado en Ingeniería para la Sociedad de la Información y Desarrollo Sostenible por la Universidad de Deusto
Due to the rise of the social networks, political parties and politicians have found new ways of establishing their position on an issue apart from traditional political manifestos. From this phenomenon, a new research area has emerged, the automation of political discourse analysis on Social Networks. To do so, this PhD dissertation has taken advantage of a widely used content analysis methodology for political manifestos, The Manifesto Project. With annotated manifestos since 2001, this methodology uses a codification which allows the analysis of political parties policy preferences regarding 56 topics, providing the scientific community with parties’ policy positions derived from the content analysis. Therefore, this PhD dissertation focuses on two main tasks: firstly, to automate the annotation process of political manifestos, in order to facilitate that same process to political scientists and secondly, to use this model as a basis to perform a political discourse analysis on Twitter using the previously mentioned Manifesto Project's methodology. To do so, we have taken advantage of two types of contextual information available in the two circumstances of the application of this research work: manifestos and Twitter. The first contextual data is what has been said previously, in the case of election manifestos the previous phrase or statement, and on twitter the preceding tweet. The second contextual information is which political party is the sender of the statement. Regarding the use of contextual information in order to improve manifestos automated classification, we have improved state of the art results in 4 out of 7 languages. With regard to Tweets' classification, we can affirm that annotated manifestos can be used as complementary data for this task, being the fine-tuned model with annotated tweets the best performing one. Moreover, contextual information does also improve the performance of the models when tweets are classified. Using this approach, we have analysed the 2016 United States presidential elections on Twitter.
Improving political discourse analysis on Twitter with context analysis
(Institute of Electrical and Electronics Engineers Inc., 2021-07-26) Bilbao Jayo, Aritz; Almeida, Aitor
In this study, we propose a new approach to perform political discourse analysis in social media platforms based on a widely used political categorisation schema in the field of political science, namely, the Comparative Manifestos Project's category schema. This categorisation schema has been traditionally used to perform content analysis in political manifestos, giving a code that indicates the domain or category of each of the phrases in the manifestos. Therefore, in this work we propose the application of this political discourse analysis technique in Twitter, using as training data of 100 publicly available annotated political manifestos in English with around 85,000 annotated sentences. Furthermore, we also analyse the improvement that using 5,000 annotated tweets could provide to the performance of the political discourse classifier already trained with political manifestos. Finally, we have analysed the 2016 United States presidential elections on Twitter using the proposed approach. As our main finding, we have been able to conclude that both datasets (political manifestos and annotated tweets) can be combined in order to achieve better results, achieving improvements in the F-Measure of more than 15 points. Moreover, we have also analysed if contextual information such as the previous tweet or the political affiliation of the transmitter could improve classifier's performance as it has already been proven for manifestos classification, introducing a novel method for political parties representation and finding that adding the previous tweet or the political leaning as contextual data does improve its performance.
Location based indoor and outdoor lightweight activity recognition system
(MDPI, 2022-01-25) Bilbao Jayo, Aritz ; Cantero López, Xabier; Almeida, Aitor ; Fasano, Luca; Montanaro, Teodoro; Sergi, Ilaria; Patrono, Luigi
In intelligent environments one of the most relevant information that can be gathered about users is their location. Their position can be easily captured without the need for a large infrastructure through devices such as smartphones or smartwatches that we easily carry around in our daily life, providing new opportunities and services in the field of pervasive computing and sensing. Location data can be very useful to infer additional information in some cases such as elderly or sick care, where inferring additional information such as the activities or types of activities they perform can provide daily indicators about their behavior and habits. To do so, we present a system able to infer user activities in indoor and outdoor environments using Global Positioning System (GPS) data together with open data sources such as OpenStreetMaps (OSM) to analyse the user’s daily activities, requiring a minimal infrastructure.
A multicenter randomized trial for quality of life evaluation by non-invasive intelligent tools during post-curative treatment follow-up for head and neck cancer: clinical study protocol
(Frontiers Media S.A., 2023-01-31) Cavalieri, Stefano; Vener, Claudia; LeBlanc, Marissa; Lopez-Perez, Laura; Fico, Giuseppe; Resteghini, Carlo; Monzani, Dario; Marton, Giulia; Pravettoni, Gabriella; Moreira-Soares, Mauricio; Filippidou, Despina Elizabeth; Almeida, Aitor; Bilbao Jayo, Aritz ; Mehanna, Hisham; Singer, Susanne; Thomas, Steve; Lacerenza, Luca; Manfuso, Alfonso; Copelli, Chiara; Mercalli, Franco; Frigessi, Arnoldo; Martinelli, Elena; Licitra, Lisa; Estevez-Priego, Estefania
Patients surviving head and neck cancer (HNC) suffer from high physical, psychological, and socioeconomic burdens. Achieving cancer-free survival with an optimal quality of life (QoL) is the primary goal for HNC patient management. So, maintaining lifelong surveillance is critical. An ambitious goal would be to carry this out through the advanced analysis of environmental, emotional, and behavioral data unobtrusively collected from mobile devices. The aim of this clinical trial is to reduce, with non-invasive tools (i.e., patients’ mobile devices), the proportion of HNC survivors (i.e., having completed their curative treatment from 3 months to 10 years) experiencing a clinically relevant reduction in QoL during follow-up. The Big Data for Quality of Life (BD4QoL) study is an international, multicenter, randomized (2:1), open-label trial. The primary endpoint is a clinically relevant global health-related EORTC QLQ-C30 QoL deterioration (decrease ≥10 points) at any point during 24 months post-treatment follow-up. The target sample size is 420 patients. Patients will be randomized to be followed up using the BD4QoL platform or per standard clinical practice. The BD4QoL platform includes a set of services to allow patients monitoring and empowerment through two main tools: a mobile application installed on participants’ smartphones, that includes a chatbot for e-coaching, and the Point of Care dashboard, to let the investigators manage patients data. In both arms, participants will be asked to complete QoL questionnaires at study entry and once every 6 months, and will undergo post-treatment follow up as per clinical practice. Patients randomized to the intervention arm (n=280) will receive access to the BD4QoL platform, those in the control arm (n=140) will not. Eligibility criteria include completing curative treatments for non-metastatic HNC and the use of an Android-based smartphone. Patients undergoing active treatments or with synchronous cancers are excluded. Clinical Trial Registration: ClinicalTrials.gov, identifier (NCT05315570).
Smart cities survey: technologies, application domains and challenges for the cities of the future
(SAGE Publications Ltd, 2019-06-10) Sánchez Corcuera, Rubén ; Núñez Marcos, Adrián; Sesma Solance, Jesús; Bilbao Jayo, Aritz ; Mulero, Rubén; Zulaika Zurimendi, Unai ; Azkune Galparsoro, Gorka ; Almeida, Aitor
The introduction of the Information and Communication Technologies throughout the last decades has created a trend of providing daily objects with smartness, aiming to make human life more comfortable. The paradigm of Smart Cities arises as a response to the goal of creating the city of the future, where (1) the well-being and rights of their citizens are guaranteed, (2) industry and (3) urban planning is assessed from an environmental and sustainable viewpoint. Smart Cities still face some challenges in their implementation, but gradually more research projects of Smart Cities are funded and executed. Moreover, cities from all around the globe are implementing Smart City features to improve services or the quality of life of their citizens. Through this article, (1) we go through various definitions of Smart Cities in the literature, (2) we review the technologies and methodologies used nowadays, (3) we summarise the different domains of applications where these technologies and methodologies are applied (e.g. health and education), (4) we show the cities that have integrated the Smart City paradigm in their daily functioning and (5) we provide a review of the open research challenges. Finally, we discuss about the future opportunities for Smart Cities and the issues that must be tackled in order to move towards the cities of the future.

Examinando por Autor "Bilbao Jayo, Aritz"

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