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726 results on '"Alonso, Andrés"'

1. Polarization-induced stress in the noisy voter model

Author

Aguilar-Janita, Miguel, Blanco-Alonso, Andres, and Khalil, Nagi

Subjects
Condensed Matter - Statistical Mechanics, Physics - Physics and Society
Abstract

A new model for the dynamics of opinion formation is proposed and analysed at the mean-field level. It can be regarded as a generalization of the noisy voter model in which agents update their binary states by copying others and by an intrinsic mechanism affected by the degree of polarization in the system. It also takes into account whether the agents enhance or reduce their intrinsic mechanism upon increasing polarization. Four phases or shapes of the steady-state probability of a fraction of agents in a given state are found (unimodal, bimodal, W and M). In the unimodal (resp. bimodal) phase, the copying (resp. intrinsic) mechanism is globally dominant, while in the W (resp. M) phase the copying (resp. intrinsic) mechanism is the relevant one close to the consensus states while it reduces its influence as approaching coexistence. In the thermodynamic limit, the bimodal and W phases disappear, while the unimodal and M phases prevail. The theoretical results, obtained analytically from the master equation, and the numerical simulations are in good agreement., Comment: 12 pages, 6 figures

Published
2024
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2. Approximation of supply curves

Author

Alonso, Andres M. and Li, Zehang

Subjects
Quantitative Finance - Pricing of Securities, Quantitative Finance - Statistical Finance, Statistics - Applications, Statistics - Methodology
Abstract

In this note, we illustrate the computation of the approximation of the supply curves using a one-step basis. We derive the expression for the L2 approximation and propose a procedure for the selection of nodes of the approximation. We illustrate the use of this approach with three large sets of bid curves from European electricity markets.

Published
2023

6. Modifiable risk factors and motivation for lifestyle change of CVD patients starting cardiac rehabilitation: The BENEFIT study

Author

Breeman, Linda D., Pérez-Alonso, Andrés, Kühling-Romero, David, Kraaijenhagen, Roderik A., Al-Dhahir, Isra, IJzerman, Renée V.H., van Eersel, Roxy, Wolstencroft, Katherine, Bonten, Tobias N., Atsma, Douwe E., Chavannes, Niels H., van Gemert-Pijnen, Lisette, Kemps, Hareld M.C., Scholte op Reimer, Wilma, Evers, Andrea W.M., and Janssen, Veronica R.

Published
2025
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9. The IRE1α-XBP1 arm of the unfolded protein response is a host factor activated in SARS-CoV-2 infection

Author

Fernández, Jose Javier, Marín, Arturo, Rosales, Romel, Penrice-Randal, Rebekah, Mlcochova, Petra, Alvarez, Yolanda, Villalón-Letelier, Fernando, Yildiz, Soner, Pérez, Enrique, Rathnasinghe, Raveen, Cupic, Anastasija, Kehrer, Thomas, Uccellini, Melissa B., Alonso, Sara, Martínez, Fernando, McGovern, Briana Lynn, Clark, Jordan J., Sharma, Parul, Bayón, Yolanda, Alonso, Andrés, Albrecht, Randy A., White, Kris M., Schotsaert, Michael, Miorin, Lisa, Stewart, James P., Hiscox, Julian A., Gupta, Ravindra K., Irigoyen, Nerea, García-Sastre, Adolfo, Crespo, Mariano Sánchez, and Fernández, Nieves

Published
2024
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13. Clustering Financial Time Series by Dependency

Author

Alonso, Andrés M., Gamboa, Carolina, Peña, Daniel, Gaul, Wolfgang, Managing Editor, Vichi, Maurizio, Managing Editor, Weihs, Claus, Managing Editor, Baier, Daniel, Editorial Board Member, Critchley, Frank, Editorial Board Member, Decker, Reinhold, Editorial Board Member, Diday, Edwin, Editorial Board Member, Greenacre, Michael, Editorial Board Member, Lauro, Carlo Natale, Editorial Board Member, Meulman, Jacqueline, Editorial Board Member, Monari, Paola, Editorial Board Member, Nishisato, Shizuhiko, Editorial Board Member, Ohsumi, Noboru, Editorial Board Member, Opitz, Otto, Editorial Board Member, Ritter, Gunter, Editorial Board Member, Schader, Martin, Editorial Board Member, Grilli, Leonardo, editor, Lupparelli, Monia, editor, Rampichini, Carla, editor, and Rocco, Emilia, editor

Published
2023
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17. Hierarchical Clustering for Smart Meter Electricity Loads based on Quantile Autocovariances

Author

Alonso, Andrés M., Nogales, F. Javier, and Ruiz, Carlos

Subjects
Statistics - Applications, Statistics - Machine Learning, Statistics - Other Statistics
Abstract

In order to improve the efficiency and sustainability of electricity systems, most countries worldwide are deploying advanced metering infrastructures, and in particular household smart meters, in the residential sector. This technology is able to record electricity load time series at a very high frequency rates, information that can be exploited to develop new clustering models to group individual households by similar consumptions patterns. To this end, in this work we propose three hierarchical clustering methodologies that allow capturing different characteristics of the time series. These are based on a set of "dissimilarity" measures computed over different features: quantile auto-covariances, and simple and partial autocorrelations. The main advantage is that they allow summarizing each time series in a few representative features so that they are computationally efficient, robust against outliers, easy to automatize, and scalable to hundreds of thousands of smart meters series. We evaluate the performance of each clustering model in a real-world smart meter dataset with thousands of half-hourly time series. The results show how the obtained clusters identify relevant consumption behaviors of households and capture part of their geo-demographic segmentation. Moreover, we apply a supervised classification procedure to explore which features are more relevant to define each cluster.

Published
2019
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18. A Single Scalable LSTM Model for Short-Term Forecasting of Disaggregated Electricity Loads

Author

Alonso, Andrés M., Nogales, F. Javier, and Ruiz, Carlos

Subjects
Statistics - Machine Learning, Computer Science - Machine Learning, Electrical Engineering and Systems Science - Signal Processing, Statistics - Applications
Abstract

Most electricity systems worldwide are deploying advanced metering infrastructures to collect relevant operational data. In particular, smart meters allow tracking electricity load consumption at a very disaggregated level and at high frequency rates. This data opens the possibility of developing new forecasting models with a potential positive impact in electricity systems. We present a general methodology that is able to process and forecast a large number of smart meter time series. Instead of using traditional and univariate approaches, we develop a single but complex recurrent neural-network model with long short-term memory that can capture individual consumption patterns and also consumptions from different households. The resulting model can accurately predict future loads (short-term) of individual consumers, even if these were not included in the original training set. This entails a great potential for large scale applications as once the single network is trained, accurate individual forecast for new consumers can be obtained at almost no computational cost. The proposed model is tested under a large set of numerical experiments by using a real-world dataset with thousands of disaggregated electricity consumption time series. Furthermore, we explore how geo-demographic segmentation of consumers may impact the forecasting accuracy of the model.

Published
2019

25. A Preliminary Study on Motivation and Gender in CLIL and Non-CLIL Types of Instruction

Author

Fontecha, Almudena Fernández and Alonso, Andrés Canga

Abstract

This paper sets out to enquiry about gender-based differences in motivation towards EFL in two different types of instruction, i.e. CLIL and EFL (non-CLIL). The study was carried out with 4th Primary education Spanish students randomly selected from two mixed-gender schools in La Rioja (Spain). The results show that non-CLIL learners are significantly more motivated than CLIL learners. The non-CLIL girls are slightly more motivated than non-CLIL boys. However, CLIL boys are slightly more motivated than CLIL girls. Non-CLIL boys are more motivated than CLIL boys, and non-CLIL girls are more motivated than CLIL girls. These findings indicate that research on CLIL should closely take into account the way this methodological approach is implemented in a specific context since context-specific elements play a pivotal role in students' motivation towards EFL.

Published
2014

26. Detecting Steading Conversational Groups on an Still Image: A Single Relational Fuzzy Approach

Author

Ferrera-Cedeño, Elvis, Acosta-Mendoza, Niusvel, Gago-Alonso, Andrés, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Nyström, Ingela, editor, Hernández Heredia, Yanio, editor, and Milián Núñez, Vladimir, editor

Published
2019
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27. Improving Regression Models by Dissimilarity Representation of Bio-chemical Data

Author

Silva-Mata, Francisco Jose, Jiménez, Catherine, Barcas, Gabriela, Estevez-Bresó, David, Acosta-Mendoza, Niusvel, Gago-Alonso, Andres, Talavera-Bustamante, Isneri, Hutchison, David, Editorial Board Member, Kanade, Takeo, Editorial Board Member, Kittler, Josef, Editorial Board Member, Kleinberg, Jon M., Editorial Board Member, Mattern, Friedemann, Editorial Board Member, Mitchell, John C., Editorial Board Member, Naor, Moni, Editorial Board Member, Pandu Rangan, C., Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Terzopoulos, Demetri, Editorial Board Member, Tygar, Doug, Editorial Board Member, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Vera-Rodriguez, Ruben, editor, Fierrez, Julian, editor, and Morales, Aythami, editor

Published
2019
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28. Computing Anomaly Score Threshold with Autoencoders Pipeline

Author

Fernández-Saúco, Igr Alexánder, Acosta-Mendoza, Niusvel, Gago-Alonso, Andrés, García-Reyes, Edel Bartolo, Hutchison, David, Editorial Board Member, Kanade, Takeo, Editorial Board Member, Kittler, Josef, Editorial Board Member, Kleinberg, Jon M., Editorial Board Member, Mattern, Friedemann, Editorial Board Member, Mitchell, John C., Editorial Board Member, Naor, Moni, Editorial Board Member, Pandu Rangan, C., Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Terzopoulos, Demetri, Editorial Board Member, Tygar, Doug, Editorial Board Member, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Vera-Rodriguez, Ruben, editor, Fierrez, Julian, editor, and Morales, Aythami, editor

Published
2019
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34. Image Clustering Based on Frequent Approximate Subgraph Mining

Author

Acosta-Mendoza, Niusvel, Carrasco-Ochoa, Jesús Ariel, Martínez-Trinidad, José Fco., Gago-Alonso, Andrés, Medina-Pagola, José E., Hutchison, David, Series Editor, Kanade, Takeo, Series Editor, Kittler, Josef, Series Editor, Kleinberg, Jon M., Series Editor, Mattern, Friedemann, Series Editor, Mitchell, John C., Series Editor, Naor, Moni, Series Editor, Pandu Rangan, C., Series Editor, Steffen, Bernhard, Series Editor, Terzopoulos, Demetri, Series Editor, Tygar, Doug, Series Editor, Weikum, Gerhard, Series Editor, Martínez-Trinidad, José Francisco, editor, Carrasco-Ochoa, Jesús Ariel, editor, Olvera-López, José Arturo, editor, and Sarkar, Sudeep, editor

Published
2018
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35. Discovering Bitcoin Mixing Using Anomaly Detection

Author

Prado-Romero, Mario Alfonso, Doerr, Christian, Gago-Alonso, Andrés, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Mendoza, Marcelo, editor, and Velastín, Sergio, editor

Published
2018
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36. A Novel Hybrid Data Reduction Strategy and Its Application to Intrusion Detection

Author

Herrera-Semenets, Vitali, Pérez-García, Osvaldo Andrés, Gago-Alonso, Andrés, Hernández-León, Raudel, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Mendoza, Marcelo, editor, and Velastín, Sergio, editor

Published
2018
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37. Multi-objective Overlapping Community Detection by Global and Local Approaches

Author

Grass-Boada, Darian H., Pérez-Suárez, Airel, Gago-Alonso, Andrés, Bello, Rafael, Rosete, Alejandro, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Mendoza, Marcelo, editor, and Velastín, Sergio, editor

Published
2018
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38. Mining Generalized Closed Patterns from Multi-graph Collections

Author

Acosta-Mendoza, Niusvel, Gago-Alonso, Andrés, Carrasco-Ochoa, Jesús Ariel, Martínez-Trinidad, José Francisco, Medina-Pagola, José Eladio, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Mendoza, Marcelo, editor, and Velastín, Sergio, editor

Published
2018
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39. Multi-graph Frequent Approximate Subgraph Mining for Image Clustering

Author

Acosta-Mendoza, Niusvel, Carrasco-Ochoa, Jesús Ariel, Gago-Alonso, Andrés, Martínez-Trinidad, José Francisco, Medina-Pagola, José Eladio, Hutchison, David, Series Editor, Kanade, Takeo, Series Editor, Kittler, Josef, Series Editor, Kleinberg, Jon M., Series Editor, Mattern, Friedemann, Series Editor, Mitchell, John C., Series Editor, Naor, Moni, Series Editor, Pandu Rangan, C., Series Editor, Steffen, Bernhard, Series Editor, Terzopoulos, Demetri, Series Editor, Tygar, Doug, Series Editor, Weikum, Gerhard, Series Editor, Hernández Heredia, Yanio, editor, Milián Núñez, Vladimir, editor, and Ruiz Shulcloper, José, editor

Published
2018
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46. Community Feature Selection for Anomaly Detection in Attributed Graphs

Author

Prado-Romero, Mario Alfonso, Gago-Alonso, Andrés, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Beltrán-Castañón, César, editor, Nyström, Ingela, editor, and Famili, Fazel, editor

Published
2017
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