@article{WuHuangRamirez-2024-One-bitspectrumsensingforcognitive,

title = {One-bit spectrum sensing for cognitive radio},

author = {P. -W. Wu and L. Huang and David Ram\'{i}rez and Y. -H. Xiao and H. C. So},

doi = {10.1109/TSP.2023.3343569},

issn = {1053-587X},

year  = {2024},

date = {2024-01-01},

urldate = {2024-01-01},

journal = {IEEE Trans. Signal Process.},

volume = {72},

pages = {549\textendash564},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{PORRASSEGOVIA2024284,

title = {Smartphone-based safety plan for suicidal crisis: The SmartCrisis 2.0 pilot study},

author = {Alejandro Porras-Segovia and Ana Maria De Granda-Beltr\'{a}n and Claudia Gallardo and Sof\'{i}a Abascal-Peir\'{o} and Mar\'{i}a Luisa Barrig\'{o}n and Antonio Art\'{e}s-Rodr\'{i}guez and Jorge L\'{o}pez-Castroman and Philippe Courtet and Enrique Baca-Garc\'{i}a},

url = {https://www.sciencedirect.com/science/article/pii/S0022395623005526},

doi = {https://doi.org/10.1016/j.jpsychires.2023.11.039},

issn = {0022-3956},

year  = {2024},

date = {2024-01-01},

journal = {Journal of Psychiatric Research},

volume = {169},

pages = {284-291},

abstract = {Here we present the findings of the pilot phase of the SmartCrisis 2.0 Randomized Clinical Trial. This pilot study aimed to explore the feasibility and acceptability of a safety plan contained in a smartphone app. Our sample consisted patients with a history of recent suicidal behaviour who installed a smartphone-based safety plan. To explore the satisfaction with of the safety plan, two patient satisfaction surveys were conducted: one qualitative and one quantitative. To explore the objective use of the safety plan, we gained access to texts contained in the safety plans completed by the patients. Participation rate was 77%, while 48.9% patients completed both satisfaction surveys at the end of the pilot phase. N = 105 successfully installed the safety plan. In a scale from 1 to 10, users rated the usefulness of the security plan at 7.4, the usability at 8.9, the degree to which they would recommend it to others at 8.6 and the overall satisfaction with the project including evaluations at 9.6. The most widely completed tab was warning signs. Feeling sad or lonely was the warning sign most commonly reported by patients. The second most completed tab was internal coping strategies. Walking or practicing any other exercise was the strategy most commonly resorted to. Our smartphone-based safety plan appears to be a feasible intervention. Data obtained from this pilot study showed high participation rates and high acceptability by patients. This, together with the general satisfaction with the project, supports its implementation in the clinical practice.},

keywords = {Ecological momentary intervention, Experience-sampling method, Suicide, Suicide attempt, Suicide ideation, Time-sampling procedures},

pubstate = {published},

tppubtype = {article}

}

@article{XiaoHuangRamirez-2023-Covariancematrixrecoveryfromone-bit,

title = {Covariance matrix recovery from one-bit data with non-zero quantization thresholds: Algorithm and performance analysis},

author = {Y. -H. Xiao and L. Huang and David Ram\'{i}rez and C. Qian and H. C. So},

doi = {10.1109/TSP.2023.3325664},

issn = {1053-587X},

year  = {2023},

date = {2023-11-01},

journal = {IEEE Trans. Signal Process.},

volume = {71},

pages = {4060\textendash4076},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{info:doi/10.2196/47167,

title = {Continuous Assessment of Function and Disability via Mobile Sensing: Real-World Data-Driven Feasibility Study},

author = {Emese S\"{u}kei and Lorena Romero-Medrano and Santiago Leon-Martinez and Jes\'{u}s Herrera L\'{o}pez and Juan Jos\'{e} Campa\~{n}a-Montes and Pablo M Olmos and Enrique Baca-Garcia and Antonio Art\'{e}s-Rodr\'{i}guez},

url = {http://www.ncbi.nlm.nih.gov/pubmed/37902823},

doi = {10.2196/47167},

issn = {2561-326X},

year  = {2023},

date = {2023-10-30},

journal = {JMIR Form Res},

volume = {7},

pages = {e47167},

abstract = {Background: Functional limitations are associated with poor clinical outcomes, higher mortality, and disability rates, especially in older adults. Continuous assessment of patients' functionality is important for clinical practice; however, traditional questionnaire-based assessment methods are very time-consuming and infrequently used. Mobile sensing offers a great range of sources that can assess function and disability daily. Objective: This work aims to prove the feasibility of an interpretable machine learning pipeline for predicting function and disability based on the World Health Organization Disability Assessment Schedule (WHODAS) 2.0 outcomes of clinical outpatients, using passively collected digital biomarkers. Methods: One-month-long behavioral time-series data consisting of physical and digital activity descriptor variables were summarized using statistical measures (minimum, maximum, mean, median, SD, and IQR), creating 64 features that were used for prediction. We then applied a sequential feature selection to each WHODAS 2.0 domain (cognition, mobility, self-care, getting along, life activities, and participation) in order to find the most descriptive features for each domain. Finally, we predicted the WHODAS 2.0 functional domain scores using linear regression using the best feature subsets. We reported the mean absolute errors and the mean absolute percentage errors over 4 folds as goodness-of-fit statistics to evaluate the model and allow for between-domain performance comparison. Results: Our machine learning\textendashbased models for predicting patients' WHODAS functionality scores per domain achieved an average (across the 6 domains) mean absolute percentage error of 19.5%, varying between 14.86% (self-care domain) and 27.21% (life activities domain). We found that 5-19 features were sufficient for each domain, and the most relevant being the distance traveled, time spent at home, time spent walking, exercise time, and vehicle time. Conclusions: Our findings show the feasibility of using machine learning\textendashbased methods to assess functional health solely from passively sensed mobile data. The feature selection step provides a set of interpretable features for each domain, ensuring better explainability to the models' decisions\textemdashan important aspect in clinical practice.},

keywords = {WHODAS; functional limitations; mobile sensing; passive ecological momentary assessment; predictive modeling; interpretable machine learning; machine learning; disability; clinical outcome},

pubstate = {published},

tppubtype = {article}

}

@article{info:doi/10.2196/43719,

title = {One-Week Suicide Risk Prediction Using Real-Time Smartphone Monitoring: Prospective Cohort Study},

author = {Maria Luisa Barrigon and Lorena Romero-Medrano and Pablo Moreno-Mu\~{n}oz and Alejandro Porras-Segovia and Jorge Lopez-Castroman and Philippe Courtet and Antonio Art\'{e}s-Rodr\'{i}guez and Enrique Baca-Garcia},

url = {http://www.ncbi.nlm.nih.gov/pubmed/37656498},

doi = {10.2196/43719},

issn = {1438-8871},

year  = {2023},

date = {2023-05-01},

journal = {J Med Internet Res},

volume = {25},

pages = {e43719},

abstract = {Background: Suicide is a major global public health issue that is becoming increasingly common despite preventive efforts. Though current methods for predicting suicide risk are not sufficiently accurate, technological advances provide invaluable tools with which we may evolve toward a personalized, predictive approach. Objective: We aim to predict the short-term (1-week) risk of suicide by identifying changes in behavioral patterns characterized through real-time smartphone monitoring in a cohort of patients with suicidal ideation. Methods: We recruited 225 patients between February 2018 and March 2020 with a history of suicidal thoughts and behavior as part of the multicenter SmartCrisis study. Throughout 6 months of follow-up, we collected information on the risk of suicide or mental health crises. All participants underwent voluntary passive monitoring using data generated by their own smartphones, including distance walked and steps taken, time spent at home, and app usage. The algorithm constructs daily activity profiles for each patient according to these data and detects changes in the distribution of these profiles over time. Such changes are considered critical periods, and their relationship with suicide-risk events was tested. Results: During follow-up, 18 (8%) participants attempted suicide, and 14 (6.2%) presented to the emergency department for psychiatric care. The behavioral changes identified by the algorithm predicted suicide risk in a time frame of 1 week with an area under the curve of 0.78, indicating good accuracy. Conclusions: We describe an innovative method to identify mental health crises based on passively collected information from patients' smartphones. This technology could be applied to homogeneous groups of patients to identify different types of crises.},

keywords = {e-health; m-health; Ecological Mometary Asssessment; risk prediction; sensor monitoring; suicidal; suicide attempt; suicide},

pubstate = {published},

tppubtype = {article}

}

@article{peis2023unsupervised,

title = {Unsupervised learning of global factors in deep generative models},

author = {Ignacio Peis and Pablo M Olmos and Antonio Art\'{e}s-Rodr\'{i}guez},

year  = {2023},

date = {2023-01-01},

urldate = {2023-01-01},

journal = {Pattern Recognition},

volume = {134},

pages = {109130},

publisher = {Elsevier},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{MORENOPINO2022109014,

title = {Deep Autoregressive Models with Spectral Attention},

author = {Fernando Moreno-Pino and Pablo M Olmos and Antonio Art\'{e}s-Rodr\'{i}guez},

url = {https://www.sciencedirect.com/science/article/pii/S0031320322004940},

doi = {https://doi.org/10.1016/j.patcog.2022.109014},

issn = {0031-3203},

year  = {2023},

date = {2023-01-01},

urldate = {2022-01-01},

journal = {Pattern Recognition},

pages = {109014},

abstract = {Time series forecasting is an important problem across many domains, playing a crucial role in multiple real-world applications. In this paper, we propose a forecasting architecture that combines deep autoregressive models with a Spectral Attention (SA) module, which merges global and local frequency domain information in the model’s embedded space. By characterizing in the spectral domain the embedding of the time series as occurrences of a random process, our method can identify global trends and seasonality patterns. Two spectral attention models, global and local to the time series, integrate this information within the forecast and perform spectral filtering to remove time series’s noise. The proposed architecture has a number of useful properties: it can be effectively incorporated into well-known forecast architectures, requiring a low number of parameters and producing explainable results that improve forecasting accuracy. We test the Spectral Attention Autoregressive Model (SAAM) on several well-known forecast datasets, consistently demonstrating that our model compares favorably to state-of-the-art approaches.},

keywords = {Attention models, Deep learning, Filtering, global-local contexts, Signal processing, spectral domain attention, time series forecasting},

pubstate = {published},

tppubtype = {article}

}

@article{romero2023multi,

title = {Multi-Source Change-Point Detection over Local Observation Models},

author = {Lorena Romero-Medrano and Antonio Art\'{e}s-Rodr\'{i}guez},

year  = {2023},

date = {2023-01-01},

urldate = {2023-01-01},

journal = {Pattern Recognition},

volume = {134},

pages = {109116},

publisher = {Elsevier},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{guerrero2023automatic,

title = {Automatic antibiotic resistance prediction in Klebsiella pneumoniae based on MALDI-TOF mass spectra},

author = {Alejandro Guerrero-L\'{o}pez and Carlos Sevilla-Salcedo and Ana Candela and Marta Hern\'{a}ndez-Garc\'{i}a and Emilia Cercenado and Pablo M Olmos and Rafael Cant\'{o}n and Patricia Mu\~{n}oz and Vanessa G\'{o}mez-Verdejo and Rosa Campo},

year  = {2023},

date = {2023-01-01},

urldate = {2023-01-01},

journal = {Engineering Applications of Artificial Intelligence},

volume = {118},

pages = {105644},

publisher = {Elsevier},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{AGUILERA2023,

title = {Regularizing transformers with deep probabilistic layers},

author = {Aurora Cobo Aguilera and Pablo M Olmos and Antonio Art\'{e}s-Rodr\'{i}guez and Fernando P\'{e}rez-Cruz},

url = {https://www.sciencedirect.com/science/article/pii/S0893608023000448},

doi = {https://doi.org/10.1016/j.neunet.2023.01.032},

issn = {0893-6080},

year  = {2023},

date = {2023-01-01},

urldate = {2023-01-01},

journal = {Neural Networks},

abstract = {Language models (LM) have grown non-stop in the last decade, from sequence-to-sequence architectures to attention-based Transformers. However, regularization is not deeply studied in those structures. In this work, we use a Gaussian Mixture Variational Autoencoder (GMVAE) as a regularizer layer. We study its advantages regarding the depth where it is placed and prove its effectiveness in several scenarios. Experimental result demonstrates that the inclusion of deep generative models within Transformer-based architectures such as BERT, RoBERTa, or XLM-R can bring more versatile models, able to generalize better and achieve improved imputation score in tasks such as SST-2 and TREC or even impute missing/noisy words with richer text.},

keywords = {Deep learning, Missing data, Natural language processing, Regularization, Transformers, Variational auto-encoder},

pubstate = {published},

tppubtype = {article}

}

@article{SEDANOCAPDEVILA2023115090,

title = {Text mining methods for the characterisation of suicidal thoughts and behaviour},

author = {Alba Sedano-Capdevila and Mauricio Toledo-Acosta and Mar\'{i}a Luisa Barrigon and Eliseo Morales-Gonz\'{a}lez and David Torres-Moreno and Bol\'{i}var Mart\'{i}nez-Zaldivar and Jorge Hermosillo-Valadez and Enrique Baca-Garc\'{i}a and Fuensanta Aroca and Antonio Artes-Rodriguez and Enrique Baca-Garc\'{i}a and Sofian Berrouiguet and Romain Billot and Juan Jose Carballo-Belloso and Philippe Courtet and David Delgado Gomez and Jorge Lopez-Castroman and Mercedes Perez Rodriguez and Julia Aznar-Carbone and Fanny Cegla and Pedro Guti\'{e}rrez-Recacha and Leire Izaguirre-Gamir and Javier Herrera-Sanchez and Marta Migoya Borja and Nora Palomar-Ciria and Adela S\'{a}nchez-Escribano Mart\'{i}nez and Manuel Vasquez and Silvia Vallejo-O\~{n}ate and Constanza Vera-Varela and Susana Amodeo-Escribano and Elsa Arrua and Olga Bautista and Maria Luisa Barrig\'{o}n and Rodrigo Carmona and Irene Caro-Ca\~{n}izares and Sonia Carollo-Vivian and Jaime Chamorro and Marta Gonz\'{a}lez-Granado and Miren Iza and M\'{o}nica Jim\'{e}nez-Gim\'{e}nez and Ana L\'{o}pez-G\'{o}mez and Laura Mata-Iturralde and Carolina Miguelez and Laura Mu\~{n}oz-Lorenzo and Roc\'{i}o Navarro-Jim\'{e}nez and Santiago Ovejero and Mar\'{i}a Luz Palacios and Margarita P\'{e}rez-Fominaya and Inmaculada Pe\~{n}uelas-Calvo and Sonia P\'{e}rez-Colmenero and Ana Rico-Romano and Alba Rodriguez-Jover and Sergio S\'{a}nchezAlonso and Juncal Sevilla-Vicente and Carolina Vigil-L\'{o}pez and Luc\'{i}a Villoria-Borrego and Marisa Martin-Calvo and Ana Alc\'{o}n-Dur\'{a}n and Ezequiel Di Stasio and Juan Manuel Garc\'{i}a-Vega and Pedro Mart\'{i}n-Calvo and Ana Jos\'{e} Ortega and Marta Segura-Valverde and Sara Mar\'{i}a Ba\~{n}\'{o}n-Gonz\'{a}lez and Edurne Crespo-Llanos and Rosana Codesal-Juli\'{a}n and Ainara Frade-Ciudad and Elena Hernando Merino and Raquel \'{A}lvarez-Garc\'{i}a and Jose Marcos Coll-Font and Pablo Portillo-de Antonio and Pablo Puras-Rico and Alba Sedano-Capdevila and Leticia Serrano-Marug\'{a}n},

url = {https://www.sciencedirect.com/science/article/pii/S0165178123000434},

doi = {https://doi.org/10.1016/j.psychres.2023.115090},

issn = {0165-1781},

year  = {2023},

date = {2023-01-01},

journal = {Psychiatry Research},

volume = {322},

pages = {115090},

abstract = {Traditional research methods have shown low predictive value for suicidal risk assessments and limitations to be applied in clinical practice. The authors sought to evaluate natural language processing as a new tool for assessing self-injurious thoughts and behaviors and emotions related. We used MEmind project to assess 2838 psychiatric outpatients. Anonymous unstructured responses to the open-ended question “how are you feeling today?” were collected according to their emotional state. Natural language processing was used to process the patients' writings. The texts were automatically represented (corpus) and analyzed to determine their emotional content and degree of suicidal risk. Authors compared the patients' texts with a question used to assess lack of desire to live, as a suicidal risk assessment tool. Corpus consists of 5,489 short free-text documents containing 12,256 tokenized or unique words. The natural language processing showed an ROC-AUC score of 0.9638 when compared with the responses to lack of a desire to live question. Natural language processing shows encouraging results for classifying subjects according to their desire not to live as a measure of suicidal risk using patients’ free texts. It is also easily applicable to clinical practice and facilitates real-time communication with patients, allowing better intervention strategies to be designed.},

keywords = {Machine learning, Mobile health, Natural language processing, Suicidal ideation, Suicide, Suicide attempt},

pubstate = {published},

tppubtype = {article}

}

@article{bonilla2023multidimensional,

title = {Multidimensional variability in ecological assessments predicts two clusters of suicidal patients},

author = {Pablo Bonilla-Escribano and David Ram\'{i}rez and Enrique Baca-Garc\'{i}a and Philippe Courtet and Antonio Art\'{e}s-Rodr\'{i}guez and Jorge L\'{o}pez-Castrom\'{a}n},

year  = {2023},

date = {2023-01-01},

journal = {Scientific reports},

volume = {13},

number = {1},

pages = {3546},

publisher = {Nature Publishing Group UK London},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{SUKEI2023100657,

title = {Automatic patient functionality assessment from multimodal data using deep learning techniques \textendash Development and feasibility evaluation},

author = {Emese S\"{u}kei and Santiago Leon-Martinez and Pablo M Olmos and Antonio Art\'{e}s-Rodr\'{i}guez},

url = {https://www.sciencedirect.com/science/article/pii/S221478292300057X},

doi = {https://doi.org/10.1016/j.invent.2023.100657},

issn = {2214-7829},

year  = {2023},

date = {2023-01-01},

urldate = {2023-01-01},

journal = {Internet Interventions},

volume = {33},

pages = {100657},

abstract = {Wearable devices and mobile sensors enable the real-time collection of an abundant source of physiological and behavioural data unobtrusively. Unlike traditional in-person evaluation or ecological momentary assessment (EMA) questionnaire-based approaches, these data sources open many possibilities in remote patient monitoring. However, defining robust models is challenging due to the data's noisy and frequently missing observations. This work proposes an attention-based Long Short-Term Memory (LSTM) neural network-based pipeline for predicting mobility impairment based on WHODAS 2.0 evaluation from such digital biomarkers. Furthermore, we addressed the missing observation problem by utilising hidden Markov models and the possibility of including information from unlabelled samples via transfer learning. We validated our approach using two wearable/mobile sensor data sets collected in the wild and socio-demographic information about the patients. Our results showed that in the WHODAS 2.0 mobility impairment prediction task, the proposed pipeline outperformed a prior baseline while additionally providing interpretability with attention heatmaps. Moreover, using a much smaller cohort via task transfer learning, the same model could learn to predict generalised anxiety severity accurately based on GAD-7 scores.},

keywords = {Attention models, Digital phenotyping, Ecological momentary assessment, In-situ patient monitoring, Time-series modelling, Transfer learning},

pubstate = {published},

tppubtype = {article}

}

@article{doi:10.1137/21M1431497,

title = {Polynomial Propagation of Moments in Stochastic Differential Equations},

author = {Alberto L\'{o}pez Yela and Joaqu\'{i}n M\'{i}guez},

url = {https://doi.org/10.1137/21M1431497},

doi = {10.1137/21M1431497},

year  = {2023},

date = {2023-01-01},

journal = {SIAM Journal on Applied Dynamical Systems},

volume = {22},

number = {2},

pages = {1153-1181},

abstract = {Abstract. We address the problem of approximating the moments of the solution, (boldsymbolX(t)) , of an It\^{o} stochastic differential equation (SDE) with drift and diffusion terms over a time grid (t_0, t_1, …, t_n) . In particular, we assume an explicit numerical scheme for the generation of sample paths (hatboldsymbolX(t_0), hatboldsymbolX(t_1), …, hatboldsymbolX(t_n), …) and then obtain recursive equations that yield any desired noncentral moment of (hatboldsymbolX(t_n)) as a function of the initial condition (hatboldsymbolX(t_0) = boldsymbolX_0) . The core of the methodology is the decomposition of the numerical solution (hatboldsymbolX(t_n)) into a “central part” and an “effective noise” term. The central term is computed deterministically from the ordinary differential equation (ODE) that results from eliminating the diffusion term in the SDE, while the effective noise accounts for the stochastic deviation from the numerical solution of the ODE. For simplicity, we describe the proposed methodology based on an Euler\textendashMaruyama integrator, but other explicit numerical schemes can be exploited in the same way. We also apply the moment approximations to construct estimates of the 1-dimensional marginal probability density functions of (hatboldsymbolX(t_n)) based on a Gram\textendashCharlier expansion. Both for the approximation of moments and 1-dimensional densities, we describe how to handle the cases in which the initial condition is fixed (i.e., (boldsymbolX_0 = boldsymbolx_0) for some deterministic and known (boldsymbolx_0) ) or random. In the latter case, we resort to polynomial chaos expansion (PCE) schemes in order to approximate the target moments. The methodology has been inspired by the PCE and differential algebra methods used for uncertainty propagation in astrodynamics problems. Hence, we illustrate its application for the quantification of uncertainty in a 2-dimensional Keplerian orbit perturbed by a Wiener noise process.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{cano2023catalog,

title = {Catalog-based atmosphere uncertainty quantification},

author = {Alejandro Cano and Alejandro Pastor and Joaqu\'{i}n M\'{i}guez and Manuel Sanjurjo-Rivo and Diego Escobar},

year  = {2023},

date = {2023-01-01},

journal = {The Journal of the Astronautical Sciences},

volume = {70},

number = {5},

pages = {42},

publisher = {Springer},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{cano2023covariance,

title = {Covariance determination for improving uncertainty realism in orbit determination and propagation},

author = {Alejandro Cano and Alejandro Pastor and Diego Escobar and Joaqu\'{i}n M\'{i}guez and Manuel Sanjurjo-Rivo},

year  = {2023},

date = {2023-01-01},

journal = {Advances in Space Research},

volume = {72},

number = {7},

pages = {2759\textendash2777},

publisher = {Elsevier},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{LOPEZGALDO2023106840,

title = {Detecting train driveshaft damages using accelerometer signals and Differential Convolutional Neural Networks},

author = {Ant\'{i}a L\'{o}pez Galdo and Alejandro Guerrero-L\'{o}pez and Pablo M. Olmos and Mar\'{i}a Jes\'{u}s G\'{o}mez Garc\'{i}a},

url = {https://www.sciencedirect.com/science/article/pii/S0952197623010242},

doi = {https://doi.org/10.1016/j.engappai.2023.106840},

issn = {0952-1976},

year  = {2023},

date = {2023-01-01},

journal = {Engineering Applications of Artificial Intelligence},

volume = {126},

pages = {106840},

abstract = {Maintaining railway axles is crucial to prevent catastrophic failures and enormous human and economic costs. In recent years, there has been a growing interest in the railway industry to adopt condition monitoring techniques to enhance the safety and efficiency of the rail transport system, which maintenance is currently based on periodic inspections. In this context, this work presents a technique for real-time crack diagnosis on railway axles, based on advanced 2D-Convolutional Neural Network (CNN) architectures applied to time\textendashfrequency representations of vibration signals. One of the critical novelties is introducing a differential CNN structure that captures the system’s statistical properties, enabling generalisation between different mechanical sets and conditions. The proposed system has been trained with data corresponding to a unique wheelset assembly, showing that the model is able to diagnose cracks on the three different wheelset tested in operation under 32 different combinations of conditions, such as load, speed, sense of rotation and vibration direction. Four different crack levels have been introduced, representing the maximum one a 0.08% of the axle diameter, and the method proposed achieved Area Under the Curve (AUC) score of 0.85, significantly outperforming results obtained with other architectures proposed in the state-of-the-art, the score of the next below is 0.76. The results demonstrate the effectiveness and practicality of this approach to accurately classify the four crack levels tested within a condition monitoring system for non-stationary conditions, that would enable reliable real-time diagnosis, thus paving the way towards a more robust and efficient railway axle maintenance system.},

keywords = {Condition monitoring, Convolutional Neural Networks, Crack detection, Deep learning, Railway axles, Vibration signal},

pubstate = {published},

tppubtype = {article}

}

@article{10132455,

title = {Handling Ill-Conditioned Omics Data With Deep Probabilistic Models},

author = {Mar\'{i}a Mart\'{i}nez-Garc\'{i}a and Pablo M. Olmos},

doi = {10.1109/JBHI.2023.3279493},

year  = {2023},

date = {2023-01-01},

journal = {IEEE Journal of Biomedical and Health Informatics},

volume = {27},

number = {9},

pages = {4601-4610},

keywords = {Data models;Biological system modeling;Probabilistic logic;Bayes methods;Bioinformatics;Mars;Feature extraction;Bayesian;classification;deep generative model;dimensionality reduction;latent space model;missing data;semi-supervised;VAE},

pubstate = {published},

tppubtype = {article}

}

@article{SANCHEZMARTIN2023118928,

title = {Enhancing diversity in GANs via non-uniform sampling},

author = {Pablo S\'{a}nchez-Mart\'{i}n and Pablo M. Olmos and Fernando Perez-Cruz},

url = {https://www.sciencedirect.com/science/article/pii/S002002552300498X},

doi = {https://doi.org/10.1016/j.ins.2023.04.007},

issn = {0020-0255},

year  = {2023},

date = {2023-01-01},

journal = {Information Sciences},

volume = {637},

pages = {118928},

abstract = {Recent advances in Generative Adversarial Networks (GANs) have led to impressive results in generating realistic data. However, GANs training is still challenging, often leading to mode-collapse, where a certain type of samples dominates the generated output. To address this issue, we propose a novel training algorithm based on bidirectional GANs (BiGANs) that can be generalized to any implicit generative model. Our algorithm relies on a non-uniform sampling scheme, where data points in a minibatch are sampled with probability inversely proportional to their log-evidence. However, estimating log-evidence is computationally expensive. Instead, we propose to use the reconstruction error, which directly correlates with the log-evidence and only requires a BiGAN network evaluation. Additionally, we combine the aforementioned method with a regularization in the empirical distribution of the encoder that further boosts the performance. Our empirical results show that the proposed methods improve both the quality and diversity of the generated samples.},

keywords = {Deep generative models, Generative adversarial networks, Mode-collapse},

pubstate = {published},

tppubtype = {article}

}

@article{2022A\&A...660A..75P,

title = {X-ray variability of HD 189733 across eight years of XMM-Newton observations},

author = {I. Pillitteri and G Micela and A. Maggio and S Sciortino and J L\'{o}pez-Santiago},

doi = {10.1051/0004-6361/202142232},

year  = {2022},

date = {2022-04-01},

urldate = {2022-04-01},

journal = {Astronomy and Astrophysics},

volume = {660},

pages = {A75},

keywords = {Astrophysics - Earth and Planetary Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Solar and Stellar Astrophysics, planetary systems, stars: activity, stars: flare, stars: individual: HD 189733, X-rays: stars},

pubstate = {published},

tppubtype = {article}

}

@article{XiaoRamirezSchreier-2022-One-bittargetdetectionincollocated,

title = {One-bit target detection in collocated MIMO Radar and performance degradation analysis},

author = {Y -H Xiao and David Ram\'{i}rez and Peter J Schreier and C. Qian and L. Huang},

doi = {10.1109/TVT.2022.3178285},

issn = {0018-9545},

year  = {2022},

date = {2022-01-01},

urldate = {2022-01-01},

journal = {IEEE Trans. Vehicular Techn. (To appear)},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{deLeon-Martineze058486,

title = {Virtual reality and speech analysis for the assessment of impulsivity and decision-making: protocol for a comparison with neuropsychological tasks and self-administered questionnaires},

author = {Santiago de Le\'{o}n and Marta Ruiz and Elena Parra-Vargas and Irene Chicchi-Giglioli and Philippe Courtet and Jorge L\'{o}pez-Castrom\'{a}n and Antonio Art\'{e}s-Rodr\'{i}guez and Enrique Baca-Garcia and Alejandro Porras-Segovia and Maria Luisa Barrigon},

url = {https://bmjopen.bmj.com/content/12/7/e058486},

doi = {10.1136/bmjopen-2021-058486},

issn = {2044-6055},

year  = {2022},

date = {2022-01-01},

urldate = {2022-01-01},

journal = {BMJ Open},

volume = {12},

number = {7},

publisher = {British Medical Journal Publishing Group},

abstract = {Introduction Impulsivity is present in a range of mental disorders and has been associated with suicide. Traditional measures of impulsivity have certain limitations, such as the lack of ecological validity. Virtual reality (VR) may overcome these issues. This study aims to validate the VR assessment tool ‘Spheres \& Shield Maze Task’ and speech analysis by comparing them with traditional measures. We hypothesise that these innovative tools will be reliable and acceptable by patients, potentially improving the simultaneous assessment of impulsivity and decision-making.Methods and analysis This study will be carried out at the University Hospital Fundaci\'{o}n Jim\'{e}nez D'iaz (Madrid, Spain). Our sample will consist of adults divided into three groups: psychiatric outpatients with a history of suicidal thoughts and/or behaviours, psychiatric outpatients without such a history and healthy volunteers. The target sample size was established at 300 participants (100 per group). Participants will complete the Barratt Impulsiveness Scale 11; the Urgency, Premeditation, Perseverance, Sensation Seeking, Positive Urgency, Impulsive Behaviour Scale; Iowa Gambling Task; Continuous Performance Test; Stop signal Task, and Go/no-go task, three questions of emotional affect, the Spheres \& Shield Maze Task and two satisfaction surveys. During these tasks, participant speech will be recorded. Construct validity of the VR environment will be calculated. We will also explore the association between VR-assessed impulsivity and history of suicidal thoughts and/or behaviour, and the association between speech and impulsivity and decision-making.Ethics and dissemination This study was approved by the Ethics Committee of the University Hospital Fundaci\'{o}n Jim\'{e}nez D'iaz (PIC128-21_FJD). Participants will be required to provide written informed consent. The findings will be presented in a series of manuscripts that will be submitted to peer-reviewed journals for publication.Trial registration number NCT05109845; Pre-results.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{PMID:35936756,

title = {Smartphone-Based Ecological Momentary Assessment for the Measurement of the Performance Status and Health-Related Quality of Life in Cancer Patients Under Systemic Anticancer Therapies: Development and Acceptability of a Mobile App},

author = {Vicente Escudero-Vilaplana and Lorena Romero-Medrano and Cristina Villanueva-Bueno and Marta Rodr\'{i}guez de Diago and Alberto Y\'{a}nez-Montesdeoca and Roberto Collado-Borrell and Juan Jos\'{e} Campa\~{n}a-Montes and Bel\'{e}n Marzal-Alfaro and Jos\'{e} Luis Revuelta-Herrero and Antonio Calles and Mar Galera and Rosa \'{A}lvarez and Ana Herranz and Mar\'{i}a Sanjurjo and Antonio Art\'{e}s-Rodr\'{i}guez},

url = {https://europepmc.org/articles/PMC9351705},

doi = {10.3389/fonc.2022.880430},

issn = {2234-943X},

year  = {2022},

date = {2022-01-01},

journal = {Frontiers in oncology},

volume = {12},

pages = {880430},

abstract = {\<h4\>Background\</h4\>We have defined a project to develop a mobile app that continually records smartphone parameters which may help define the Eastern Cooperative Oncology Group performance status (ECOG-PS) and the health-related quality of life (HRQoL), without interaction with patients or professionals. This project is divided into 3 phases. Here we describe phase 1. The objective of this phase was to develop the app and assess its usability concerning patient characteristics, acceptability, and satisfaction.\<h4\>Methods\</h4\>The app eB2-ECOG was developed and installed in the smartphone of cancer patients who will be followed for six months. Criteria inclusion were: age over 18-year-old; diagnosed with unresectable or metastatic lung cancer, gastrointestinal stromal tumor, sarcoma, or head and neck cancer; under systemic anticancer therapies; and possession of a Smartphone. The app will collect passive and active data from the patients while healthcare professionals will evaluate the ECOG-PS and HRQoL through conventional tools. Acceptability was assessed during the follow-up. Patients answered a satisfaction survey in the app between 3-6 months from their inclusion.\<h4\>Results\</h4\>The app developed provides a system for continuously collecting, merging, and processing data related to patient's health and physical activity. It provides a transparent capture service based on all the available data of a patient. Currently, 106 patients have been recruited. A total of 36 patients were excluded, most of them (21/36) due to technological reasons. We assessed 69 patients (53 lung cancer, 8 gastrointestinal stromal tumors, 5 sarcomas, and 3 head and neck cancer). Concerning app satisfaction, 70.4% (20/27) of patients found the app intuitive and easy to use, and 51.9% (17/27) of them said that the app helped them to improve and handle their problems better. Overall, 17 out of 27 patients [62.9%] were satisfied with the app, and 14 of them [51.8%] would recommend the app to other patients.\<h4\>Conclusions\</h4\>We observed that the app's acceptability and satisfaction were good, which is essential for the continuity of the project. In the subsequent phases, we will develop predictive models based on the collected information during this phase. We will validate the method and analyze the sensitivity of the automated results.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{cano2022improving,

title = {Improving Orbital Uncertainty Realism Through Covariance Determination in GEO},

author = {Alejandro Cano and Alejandro Pastor and Sergio Fern\'{a}ndez and Joaqu\'{i}n M\'{i}guez and Manuel Sanjurjo-Rivo and Diego Escobar},

year  = {2022},

date = {2022-01-01},

urldate = {2022-01-01},

journal = {The Journal of the Astronautical Sciences},

volume = {69},

number = {5},

pages = {1394--1420},

publisher = {Springer},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{barrigon2022smartphone,

title = {Smartphone-based Ecological Momentary Intervention for secondary prevention of suicidal thoughts and behaviour: protocol for the SmartCrisis V. 2.0 randomised clinical trial},

author = {Maria Luisa Barrigon and Alejandro Porras-Segovia and Philippe Courtet and Jorge Lopez-Castroman and Sofian Berrouiguet and Mar\'{i}a-Mercedes P\'{e}rez-Rodr\'{i}guez and Antonio Art\'{e}s-Rodr\'{i}guez and Enrique Baca-Garcia},

year  = {2022},

date = {2022-01-01},

urldate = {2022-01-01},

journal = {BMJ open},

volume = {12},

number = {9},

pages = {e051807},

publisher = {British Medical Journal Publishing Group},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{CANO2022,

title = {Covariance determination for improving uncertainty realism in orbit determination and propagation},

author = {Alejandro Cano and Alejandro Pastor and Diego Escobar and Joaqu\'{i}n M\'{i}guez and Manuel Sanjurjo-Rivo},

url = {https://www.sciencedirect.com/science/article/pii/S0273117722007190},

doi = {https://doi.org/10.1016/j.asr.2022.08.001},

issn = {0273-1177},

year  = {2022},

date = {2022-01-01},

urldate = {2022-01-01},

journal = {Advances in Space Research},

abstract = {The reliability of the uncertainty characterization, also known as uncertainty realism, is of the uttermost importance for Space Situational Awareness (SSA) services. Among the many sources of uncertainty in the space environment, the most relevant one is the inherent uncertainty of the dynamic models, which is generally not considered in the batch least-squares Orbit Determination (OD) processes in operational scenarios. A classical approach to account for these sources of uncertainty is the theory of consider parameters. In this approach, a set of uncertain parameters are included in the underlying dynamical model, in such a way that the model uncertainty is represented by the variances of these parameters. However, realistic variances of these consider parameters are not known a priori. This work introduces a methodology to infer the variance of consider parameters based on the observed distribution of the Mahalanobis distance of the orbital differences between predicted and estimated orbits, which theoretically should follow a chi-square distribution under Gaussian assumptions. Empirical Distribution Function statistics such as the Cramer-von-Mises and the Kolmogorov\textendashSmirnov distances are used to determine optimum consider parameter variances. The methodology is presented in this paper and validated in a series of simulated scenarios emulating the complexity of operational applications.},

keywords = {Chi-square distribution, Covariance determination, Covariance realism, Cramer-von-Mises, Kolmogorov\textendashSmirnov, Mahalanobis distance, Space situational awareness, Uncertainty realism},

pubstate = {published},

tppubtype = {article}

}

@article{Llorente2022OnTS,

title = {On the safe use of prior densities for Bayesian model selection},

author = {Fernando Llorente and Luca Martino and E. Curbelo and J L\'{o}pez-Santiago and David Delgado},

year  = {2022},

date = {2022-01-01},

urldate = {2022-01-01},

journal = {WIREs Computational Statistics},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{porras2022six,

title = {Six-month clinical and ecological momentary assessment follow-up of patients at high risk of suicide: a survival analysis},

author = {Alejandro Porras-Segovia and Manon Moreno and Mar\'{i}a Luisa Barrig\'{o}n and Jorge L\'{o}pez Castroman and Philippe Courtet and Sofian Berrouiguet and Antonio Art\'{e}s-Rodr\'{i}guez and Enrique Baca-Garc\'{i}a},

year  = {2022},

date = {2022-01-01},

urldate = {2022-01-01},

journal = {The Journal of Clinical Psychiatry},

volume = {84},

number = {1},

pages = {44594},

publisher = {Physicians Postgraduate Press, Inc.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{vazquez2022validation,

title = {Validation of scientific topic models using graph analysis and corpus metadata},

author = {Manuel A V\'{a}zquez and Jorge Pereira-Delgado and J Cid-Sueiro and Jer\'{o}nimo Arenas-Garc\'{i}a},

year  = {2022},

date = {2022-01-01},

urldate = {2022-01-01},

journal = {Scientometrics},

pages = {1--18},

publisher = {Springer},

keywords = {yo},

pubstate = {published},

tppubtype = {article}

}

@article{sevilla2022bayesian,

title = {Bayesian sparse factor analysis with kernelized observations},

author = {Carlos Sevilla-Salcedo and Alejandro Guerrero-L\'{o}pez and Pablo M Olmos and Vanessa G\'{o}mez-Verdejo},

year  = {2022},

date = {2022-01-01},

journal = {Neurocomputing},

volume = {490},

pages = {66--78},

publisher = {Elsevier},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{10.1182/blood-2022-168461,

title = {Identification of Predictive Models Including Polymorphisms in Cytokines Genes Associated with Post-Transplant Complications after Identical HLA-Allogeneic Stem Cell Transplantation},

author = {Paula Mu\~{n}iz Sevilla and Mar\'{i}a Mart\'{i}nez-Garc\'{i}a and Mi Kwon and Rebeca Bail\'{e}n and Gillen Oarbeascoa and Diego Carbonell and Julia Su\'{a}rez Gonz\'{a}lez and Mar\'{i}a Chicano Lavilla and Cristina Andres and Juan Carlos Trivi\~{n}o and Javier Anguita and Jos\'{e} Luis D\'{i}ez-Mart\'{i}n and Pablo M Olmos and Carolina Martinez-Laperche and Ismael Bu\~{n}o},

url = {https://doi.org/10.1182/blood-2022-168461},

doi = {10.1182/blood-2022-168461},

issn = {0006-4971},

year  = {2022},

date = {2022-01-01},

urldate = {2022-01-01},

journal = {Blood},

volume = {140},

number = {Supplement 1},

pages = {4795-4796},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{9764678,

title = {Generalized Perfect Codes for Symmetric Classical-Quantum Channels},

author = {Andreu Blasco Coll and Gonzalo Vazquez-Vilar and Javier Rodr\'{i}guez Fonollosa},

doi = {10.1109/TIT.2022.3170868},

year  = {2022},

date = {2022-01-01},

journal = {IEEE Transactions on Information Theory},

volume = {68},

number = {9},

pages = {5923-5936},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{9805755,

title = {Coded Caching with Heterogeneous User Profiles},

author = {Ciyuan Zhang and Su Wang and Vaneet Aggarwal and Borja Peleato},

doi = {10.1109/TIT.2022.3186210},

year  = {2022},

date = {2022-01-01},

urldate = {2022-01-01},

journal = {IEEE Transactions on Information Theory},

pages = {1-1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{DBLP:journals/sac/ZhangWP22,

title = {Accelerated parallel non-conjugate sampling for Bayesian non-parametric  models},

author = {Michael Minyi Zhang and Sinead A. Williamson and Fernando Perez-Cruz},

year  = {2022},

date = {2022-01-01},

urldate = {2022-01-01},

journal = {Stat. Comput.},

volume = {32},

number = {3},

pages = {50},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{nhess-22-2031-2022,

title = {Data-driven automated predictions of the avalanche danger level for dry-snow conditions in Switzerland},

author = {C. P\'{e}rez-Guill\'{e}n and Frank Techel and M. Hendrick and Michele Volpi and A. Herwijnen and T. Olevski and G. Obozinski and Fernando Perez-Cruz and J. Schweizer},

url = {https://nhess.copernicus.org/articles/22/2031/2022/},

doi = {10.5194/nhess-22-2031-2022},

year  = {2022},

date = {2022-01-01},

urldate = {2022-01-01},

journal = {Natural Hazards and Earth System Sciences},

volume = {22},

number = {6},

pages = {2031--2056},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{PANTOJAROSERO2022128264,

title = {TOPO-Loss for continuity-preserving crack detection using deep learning},

author = {B. G. Pantoja-Rosero and D. Oner and M. Kozinski and R. Achanta and P. Fua and Fernando Perez-Cruz and K. Beyer},

url = {https://www.sciencedirect.com/science/article/pii/S0950061822019250},

doi = {https://doi.org/10.1016/j.conbuildmat.2022.128264},

issn = {0950-0618},

year  = {2022},

date = {2022-01-01},

urldate = {2022-01-01},

journal = {Construction and Building Materials},

volume = {344},

pages = {128264},

abstract = {We present a method for segmenting cracks in images of masonry buildings damaged by earthquakes. Existing methods of crack detection fail to preserve the continuity of cracks, and their performance deteriorates with imprecise training labels. We address these problems by adapting an approach previously proposed for reconstructing roads in aerial images, in which a Convolutional Neural Network is trained with a loss function specifically designed to encourage the continuity of thin structures and to accommodate imprecise annotations. We evaluate combinations of three loss functions (the Mean Squared Error, the Dice loss and the new connectivity-oriented loss) on two datasets using TernausNet, a deep network shown to attain state-of-the-art accuracy in crack detection. We herein show that combining these three losses significantly improves the topology of the predictions quantitatively and qualitatively. We also propose a new continuity metric, named Cracks Per Patch (CPP), and share a new dataset of images of earthquake-affected urban scenes accompanied by crack annotations. The dataset and implementations are publicly available for future studies and benchmarking (https://github.com/eesd-epfl/topo_crack_detection and https://doi.org/10.5281/zenodo.6769028).},

keywords = {Crack detection, Deep learning, Masonry buildings, Post-earthquake assessment},

pubstate = {published},

tppubtype = {article}

}

@article{PANTOJAROSERO2022104430,

title = {Generating LOD3 building models from structure-from-motion and semantic segmentation},

author = {B. G. Pantoja-Rosero and R. Achanta and M. Kozinski and P. Fua and Fernando Perez-Cruz and K. Beyer},

url = {https://www.sciencedirect.com/science/article/pii/S092658052200303X},

doi = {https://doi.org/10.1016/j.autcon.2022.104430},

issn = {0926-5805},

year  = {2022},

date = {2022-01-01},

urldate = {2022-01-01},

journal = {Automation in Construction},

volume = {141},

pages = {104430},

abstract = {This paper describes a pipeline for automatically generating level of detail (LOD) models (digital twins), specifically LOD2 and LOD3, from free-standing buildings. Our approach combines structure from motion (SfM) with deep-learning-based segmentation techniques. Given multiple-view images of a building, we compute a three-dimensional (3D) planar abstraction (LOD2 model) of its point cloud using SfM techniques. To obtain LOD3 models, we use deep learning to perform semantic segmentation of the openings in the two-dimensional (2D) images. Unlike existing approaches, we do not rely on complex input, pre-defined 3D shapes or manual intervention. To demonstrate the robustness of our method, we show that it can generate 3D building shapes from a collection of building images with no further input. For evaluating reconstructions, we also propose two novel metrics. The first is a Euclidean\textendashdistance-based correlation of the 3D building model with the point cloud. The second involves re-projecting 3D model facades onto source photos to determine dice scores with respect to the ground-truth masks. Finally, we make the code, the image datasets, SfM outputs, and digital twins reported in this work publicly available in github.com/eesd-epfl/LOD3_buildings and doi.org/10.5281/zenodo.6651663. With this work we aim to contribute research in applications such as construction management, city planning, and mechanical analysis, among others.},

keywords = {3D building models, Deep learning, Digital twin, LOD models, Masonry buildings, Structure from motion},

pubstate = {published},

tppubtype = {article}

}

@article{9594658b,

title = {Medical Data Wrangling With Sequential Variational Autoencoders},

author = {Daniel Barrej\'{o}n and Pablo M Olmos and Antonio Art\'{e}s-Rodr\'{i}guez},

doi = {10.1109/JBHI.2021.3123839},

year  = {2022},

date = {2022-01-01},

urldate = {2022-01-01},

journal = {IEEE Journal of Biomedical and Health Informatics},

volume = {26},

number = {6},

pages = {2737-2745},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{romero2022multinomial,

title = {Multinomial Sampling of Latent Variables for Hierarchical Change-Point Detection},

author = {Lorena Romero-Medrano and P Moreno-Mu\~{n}oz and Antonio Art\'{e}s-Rodr\'{i}guez},

year  = {2022},

date = {2022-01-01},

urldate = {2022-01-01},

journal = {Journal of Signal Processing Systems},

volume = {94},

number = {2},

pages = {215--227},

publisher = {Springer},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{PORRASSEGOVIA2022145,

title = {Real-world feasibility and acceptability of real-time suicide risk monitoring via smartphones: A 6-month follow-up cohort},

author = {Alejandro Porras-Segovia and Isaac D\'{i}az-Oliv\'{a}n and Maria Luisa Barrig\'{o}n and Manon Moreno and Antonio Art\'{e}s-Rodr\'{i}guez and Mercedes M Perez-Rodriguez and Enrique Baca-Garc\'{i}a},

url = {https://www.sciencedirect.com/science/article/pii/S0022395622001078},

doi = {https://doi.org/10.1016/j.jpsychires.2022.02.026},

issn = {0022-3956},

year  = {2022},

date = {2022-01-01},

urldate = {2022-01-01},

journal = {Journal of Psychiatric Research},

volume = {149},

pages = {145-154},

abstract = {Active and passive Ecological Momentary Assessment of suicide risk is crucial for suicide prevention. We aimed to assess the feasibility and acceptability of active and passive smartphone-based EMA in real-world conditions in patients at high risk for suicide. We followed 393 patients at high risk for suicide for six months using two mobile health applications: the MEmind (active) and the eB2 (passive). Retention with active EMA was 79.3% after 1 month and 22.6% after 6 months. Retention with passive EMA was 87.8% after 1 month and 46.6% after 6 months. Satisfaction with the MEmind app, uninstalling the eB2 app and diagnosis of eating disorders were independently associated with stopping active EMA. Satisfaction with the eB2 app and uninstalling the MEmind app were independently associated with stopping passive EMA. Smartphone-based active and passive EMA are feasible and may increase accessibility to mental healthcare.},

keywords = {Ecological momentary assessment, eHealth, Mhealth, Suicide, Suicide attempt, Suicide ideation},

pubstate = {published},

tppubtype = {article}

}

@article{Ravi-TIT2022,

title = {Scaling Laws for Gaussian Random Many-Access Channels},

author = {Jithin Ravi and Tobias Koch},

doi = {10.1109/TIT.2021.3139430},

year  = {2022},

date = {2022-01-01},

urldate = {2022-01-01},

journal = {IEEE Transactions on Information Theory},

volume = {68},

number = {4},

pages = {2429-2459},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{9791424,

title = {Coded Caching with Full Heterogeneity: Exact Capacity of The Two-User/Two-File Case},

author = {Chih-Hua Chang and Borja Peleato and Chih-Chun Wang},

doi = {10.1109/TIT.2022.3181411},

year  = {2022},

date = {2022-01-01},

urldate = {2022-01-01},

journal = {IEEE Transactions on Information Theory},

pages = {1-1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{PerezViaVielva-2022-OnlinedetectionandSNRestimation,

title = {Online detection and SNR estimation in cooperative spectrum sensing},

author = {J. P\'{e}rez and Javier V\'{i}a and L. Vielva and David Ram\'{i}rez},

doi = {10.1109/TWC.2021.3113089},

issn = {1536-1276},

year  = {2022},

date = {2022-00-01},

urldate = {2022-00-01},

journal = {IEEE Trans. Wireless Comm.},

volume = {21},

number = {4},

pages = {2521--2533},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Ramirez,

title = {Graph-signal reconstruction and blind deconvolution for structured inputs},

author = {David Ram\'{i}rez and Antonio G Marques and Santiago Segarra},

doi = {10.1016/j.sigpro.2021.108180},

year  = {2021},

date = {2021-11-01},

urldate = {2021-11-01},

journal = {Signal Process. (Special issue on Processing and Learning over Graphs)},

volume = {188},

pages = {108180},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Martino_2021,

title = {Compressed Particle Methods for Expensive Models With Application in Astronomy and Remote Sensing},

author = {Luca Martino and Victor Elvira and J L\'{o}pez-Santiago and Gustau Camps-Valls},

url = {https://doi.org/10.1109%2Ftaes.2021.3061791},

doi = {10.1109/taes.2021.3061791},

year  = {2021},

date = {2021-10-01},

urldate = {2021-10-01},

journal = {IEEE Transactions on Aerospace and Electronic Systems},

volume = {57},

number = {5},

pages = {2607-2621},

publisher = {Institute of Electrical and Electronics Engineers (IEEE)},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{info:doi/10.2196/30833,

title = {Shift in Social Media App Usage During COVID-19 Lockdown and Clinical Anxiety Symptoms: Machine Learning--Based Ecological Momentary Assessment Study},

author = {J. Ryu and Emese S\"{u}kei and Agnes Norbury and H. Liu, S. and Juan Jos\'{e} Campa\~{n}a-Montes and Enrique Baca-Garc\'{i}a and Antonio Art\'{e}s-Rodr\'{i}guez and Mercedes M Perez-Rodriguez},

url = {http://www.ncbi.nlm.nih.gov/pubmed/34524091},

doi = {10.2196/30833},

issn = {2368-7959},

year  = {2021},

date = {2021-09-15},

urldate = {2021-09-15},

journal = {JMIR Ment Health},

volume = {8},

number = {9},

pages = {e30833},

abstract = {Background: Anxiety symptoms during public health crises are associated with adverse psychiatric outcomes and impaired health decision-making. The interaction between real-time social media use patterns and clinical anxiety during infectious disease outbreaks is underexplored. Objective: We aimed to evaluate the usage pattern of 2 types of social media apps (communication and social networking) among patients in outpatient psychiatric treatment during the COVID-19 surge and lockdown in Madrid, Spain and their short-term anxiety symptoms (7-item General Anxiety Disorder scale) at clinical follow-up. Methods: The individual-level shifts in median social media usage behavior from February 1 through May 3, 2020 were summarized using repeated measures analysis of variance that accounted for the fixed effects of the lockdown (prelockdown versus postlockdown), group (clinical anxiety group versus nonclinical anxiety group), the interaction of lockdown and group, and random effects of users. A machine learning--based approach that combined a hidden Markov model and logistic regression was applied to predict clinical anxiety (n=44) and nonclinical anxiety (n=51), based on longitudinal time-series data that comprised communication and social networking app usage (in seconds) as well as anxiety-associated clinical survey variables, including the presence of an essential worker in the household, worries about life instability, changes in social interaction frequency during the lockdown, cohabitation status, and health status. Results: Individual-level analysis of daily social media usage showed that the increase in communication app usage from prelockdown to lockdown period was significantly smaller in the clinical anxiety group than that in the nonclinical anxiety group (F},

keywords = {\"{a}nxiety disorder; COVID-19; social media; public health; digital phenotype; ecological momentary assessment; smartphone; machine learning; hidden Markov model\"},

pubstate = {published},

tppubtype = {article}

}

@article{info:doi/10.2196/26548,

title = {Use of Ecological Momentary Assessment Through a Passive Smartphone-Based App (eB2) by Patients With Schizophrenia: Acceptability Study},

author = {Javier-David Lopez-Morinigo and Mar\'{i}a Luisa Barrig\'{o}n and Alejandro Porras-Segovia and Ver\'{o}nica Gonz\'{a}lez Ruiz-Ruano and Adela S\'{a}nchez Escribano Mart\'{i}nez and P. -J. Escobedo-Aedo and S. S\'{a}nchez-Alonso and L. Mata-Iturralde and Laura Mu\~{n}oz Lorenzo and Antonio Art\'{e}s-Rodr\'{i}guez and Anthony S David and Enrique Baca-Garc\'{i}a},

url = {http://www.ncbi.nlm.nih.gov/pubmed/34309576},

doi = {10.2196/26548},

issn = {1438-8871},

year  = {2021},

date = {2021-07-26},

urldate = {2021-07-26},

journal = {J Med Internet Res},

volume = {23},

number = {7},

pages = {e26548},

abstract = {Background: Ecological momentary assessment (EMA) tools appear to be useful interventions for collecting real-time data on patients' behavior and functioning. However, concerns have been voiced regarding the acceptability of EMA among patients with schizophrenia and the factors influencing EMA acceptability. Objective: The aim of this study was to investigate the acceptability of a passive smartphone-based EMA app, evidence-based behavior (eB2), among patients with schizophrenia spectrum disorders and the putative variables underlying their acceptance. Methods: The participants in this study were from an ongoing randomized controlled trial (RCT) of metacognitive training, consisting of outpatients with schizophrenia spectrum disorders (F20-29 of 10th revision of the International Statistical Classification of Diseases and Related Health Problems), aged 18-64 years, none of whom received any financial compensation. Those who consented to installation of the eB2 app (users) were compared with those who did not (nonusers) in sociodemographic, clinical, premorbid adjustment, neurocognitive, psychopathological, insight, and metacognitive variables. A multivariable binary logistic regression tested the influence of the above (independent) variables on ``being user versus nonuser'' (acceptability), which was the main outcome measure. Results: Out of the 77 RCT participants, 24 (31%) consented to installing eB2, which remained installed till the end of the study (median follow-up 14.50 weeks) in 14 participants (70%). Users were younger and had a higher education level, better premorbid adjustment, better executive function (according to the Trail Making Test), and higher cognitive insight levels (measured with the Beck Cognitive Insight Scale) than nonusers (univariate analyses) although only age (OR 0.93, 95% CI 0.86-0.99; P=.048) and early adolescence premorbid adjustment (OR 0.75, 95% CI 0.61-0.93; P=.01) survived the multivariable regression model, thus predicting eB2 acceptability. Conclusions: Acceptability of a passive smartphone-based EMA app among participants with schizophrenia spectrum disorders in this RCT where no participant received financial compensation was, as expected, relatively low, and linked with being young and good premorbid adjustment. Further research should examine how to increase EMA acceptability in patients with schizophrenia spectrum disorders, in particular, older participants and those with poor premorbid adjustment. Trial Registration: ClinicalTrials.gov NCT04104347; https://clinicaltrials.gov/ct2/show/NCT04104347},

keywords = {ecological momentary assessment; acceptability; schizophrenia spectrum disorders; eB2; digital tools; mental health; schizophrenia; real-time data; patients; digital health; internet; mobile apps},

pubstate = {published},

tppubtype = {article}

}

@article{info:doi/10.2196/24465,

title = {Predicting Emotional States Using Behavioral Markers Derived From Passively Sensed Data: Data-Driven Machine Learning Approach},

author = {Emese S\"{u}kei and Agnes Norbury and Mercedes M Perez-Rodriguez and Pablo M Olmos and Antonio Art\'{e}s-Rodr\'{i}guez},

url = {http://www.ncbi.nlm.nih.gov/pubmed/33749612},

doi = {10.2196/24465},

issn = {2291-5222},

year  = {2021},

date = {2021-03-22},

journal = {JMIR Mhealth Uhealth},

volume = {9},

number = {3},

pages = {e24465},

abstract = {Background: Mental health disorders affect multiple aspects of patients' lives, including mood, cognition, and behavior. eHealth and mobile health (mHealth) technologies enable rich sets of information to be collected noninvasively, representing a promising opportunity to construct behavioral markers of mental health. Combining such data with self-reported information about psychological symptoms may provide a more comprehensive and contextualized view of a patient's mental state than questionnaire data alone. However, mobile sensed data are usually noisy and incomplete, with significant amounts of missing observations. Therefore, recognizing the clinical potential of mHealth tools depends critically on developing methods to cope with such data issues. Objective: This study aims to present a machine learning--based approach for emotional state prediction that uses passively collected data from mobile phones and wearable devices and self-reported emotions. The proposed methods must cope with high-dimensional and heterogeneous time-series data with a large percentage of missing observations. Methods: Passively sensed behavior and self-reported emotional state data from a cohort of 943 individuals (outpatients recruited from community clinics) were available for analysis. All patients had at least 30 days' worth of naturally occurring behavior observations, including information about physical activity, geolocation, sleep, and smartphone app use. These regularly sampled but frequently missing and heterogeneous time series were analyzed with the following probabilistic latent variable models for data averaging and feature extraction: mixture model (MM) and hidden Markov model (HMM). The extracted features were then combined with a classifier to predict emotional state. A variety of classical machine learning methods and recurrent neural networks were compared. Finally, a personalized Bayesian model was proposed to improve performance by considering the individual differences in the data and applying a different classifier bias term for each patient. Results: Probabilistic generative models proved to be good preprocessing and feature extractor tools for data with large percentages of missing observations. Models that took into account the posterior probabilities of the MM and HMM latent states outperformed those that did not by more than 20%, suggesting that the underlying behavioral patterns identified were meaningful for individuals' overall emotional state. The best performing generalized models achieved a 0.81 area under the curve of the receiver operating characteristic and 0.71 area under the precision-recall curve when predicting self-reported emotional valence from behavior in held-out test data. Moreover, the proposed personalized models demonstrated that accounting for individual differences through a simple hierarchical model can substantially improve emotional state prediction performance without relying on previous days' data. Conclusions: These findings demonstrate the feasibility of designing machine learning models for predicting emotional states from mobile sensing data capable of dealing with heterogeneous data with large numbers of missing observations. Such models may represent valuable tools for clinicians to monitor patients' mood states.},

keywords = {mental health; affect; mobile health; mobile phone; digital phenotype; machine learning; Bayesian analysis; probabilistic models; personalized models},

pubstate = {published},

tppubtype = {article}

}

@article{info:doi/10.2196/17116,

title = {Psychiatric Profiles of eHealth Users Evaluated Using Data Mining Techniques: Cohort Study},

author = {Jorge Lopez-Castroman and Diana Abad-Tortosa and Aurora Cobo Aguilera and Philippe Courtet and Maria Luisa Barrig\'{o}n and Antonio Art\'{e}s-Rodr\'{i}guez and Enrique Baca-Garc\'{i}a},

url = {http://www.ncbi.nlm.nih.gov/pubmed/33470943},

doi = {10.2196/17116},

issn = {2368-7959},

year  = {2021},

date = {2021-01-20},

journal = {JMIR Ment Health},

volume = {8},

number = {1},

pages = {e17116},

abstract = {Background: New technologies are changing access to medical records and the relationship between physicians and patients. Professionals can now use e-mental health tools to provide prompt and personalized responses to patients with mental illness. However, there is a lack of knowledge about the digital phenotypes of patients who use e-mental health apps. Objective: This study aimed to reveal the profiles of users of a mental health app through machine learning techniques. Methods: We applied a nonparametric model, the Sparse Poisson Factorization Model, to discover latent features in the response patterns of 2254 psychiatric outpatients to a short self-assessment on general health. The assessment was completed through a mental health app after the first login. Results: The results showed the following four different profiles of patients: (1) all patients had feelings of worthlessness, aggressiveness, and suicidal ideas; (2) one in four reported low energy and difficulties to cope with problems; (3) less than a quarter described depressive symptoms with extremely high scores in suicidal thoughts and aggressiveness; and (4) a small number, possibly with the most severe conditions, reported a combination of all these features. Conclusions: User profiles did not overlap with clinician-made diagnoses. Since each profile seems to be associated with a different level of severity, the profiles could be useful for the prediction of behavioral risks among users of e-mental health apps.},

keywords = {mental disorders; suicide prevention; suicidal ideation; data mining; digital phenotyping},

pubstate = {published},

tppubtype = {article}

}

@article{info12030121,

title = {A Novel Approach for Classification and Forecasting of Time Series in Particle Accelerators},

author = {Sichen Li and M\'{e}lissa Zacharias and Jochem Snuverink and Jaime Coello de Portugal and Fernando Perez-Cruz and Davide Reggiani and Andreas Adelmann},

url = {https://www.mdpi.com/2078-2489/12/3/121},

doi = {10.3390/info12030121},

issn = {2078-2489},

year  = {2021},

date = {2021-01-01},

urldate = {2021-01-01},

journal = {Information},

volume = {12},

number = {3},

abstract = {The beam interruptions (interlocks) of particle accelerators, despite being necessary safety measures, lead to abrupt operational changes and a substantial loss of beam time. A novel time series classification approach is applied to decrease beam time loss in the High-Intensity Proton Accelerator complex by forecasting interlock events. The forecasting is performed through binary classification of windows of multivariate time series. The time series are transformed into Recurrence Plots which are then classified by a Convolutional Neural Network, which not only captures the inner structure of the time series but also uses the advances of image classification techniques. Our best-performing interlock-to-stable classifier reaches an Area under the ROC Curve value of 0.71±0.01 compared to 0.65±0.01 of a Random Forest model, and it can potentially reduce the beam time loss by 0.5±0.2 s per interlock.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}