Hugo Alatrista-Salas

Dr. Hugo Alatrista-Salas

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Research Focus & Metrics

Academic Career Length

16Years (2011-Present)

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

Representative Publications

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11 October 2022 in Applied Sciences
Verified
Journal Article
Open access
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OAOlga Alcantara
Olga Alcantara
MCMiguel Núñez del Prado Cortez
Miguel Núñez del Prado Cortez
HAHugo Alatrista-Salas
Hugo Alatrista-Salas
This paper reviews the most recent literature on experiments with different Machine Learning, Deep Learning and Natural Language Processing techniques applied to predict judicial and administrative decisions. Among the most outstanding findings, we have that the most used data mining techniques are Support Vector Machine (SVM), K Nearest Neighbours (K-NN) and Random Forest (RF), and in terms of the most used deep learning techniques, we found Long-Term Memory (LSTM) and transformers such as BERT. An important finding in the papers reviewed was that the use of machine learning techniques has prevailed over those of deep learning. Regarding the place of origin of the research carried out, we found that 64% of the works belong to studies carried out in English-speaking countries, 8% in Portuguese and 28% in other languages (such as German, Chinese, Turkish, Spanish, etc.). Very few works of this type have been carried out in Spanish-speaking countries. The classification criteria of the works have been based, on the one hand, on the identification of the classifiers used to predict situations (or events with legal interference) or judicial decisions and, on the other hand, on the application of classifiers to the phenomena regulated by the different branches of law: criminal, constitutional, human rights, administrative, intellectual property, family law, tax law and others. The corpus size analyzed in the reviewed works reached 100,000 documents in 2020. Finally, another important finding lies in the accuracy of these predictive techniques, reaching predictions of over 60% in different branches of law.

1 December 2020 in World Development
Verified
Journal Article
Closed access
DVDaniel Velásquez
Daniel Velásquez
SMSantiago Medina
Santiago Medina
GYGustavo Yamada
Gustavo Yamada
PLPablo Lavado
Pablo Lavado
MNMiguel Nunez-Del-Prado
Miguel Nunez-Del-Prado
JMJuandiego Morzán
Juandiego Morzán

26 May 2023 in Remote Sensing
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Journal Article
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FTFedra Trujillano
Fedra Trujillano
GJGabriel Jimenez
Gabriel Jimenez
HAHugo Alatrista-Salas
Hugo Alatrista-Salas
IBIsabel Byrne
Isabel Byrne
MCMiguel Núñez del Prado Cortez
Miguel Núñez del Prado Cortez
KFKimberly M. Fornace
Kimberly M. Fornace
Disease control programs are needed to identify the breeding sites of mosquitoes, which transmit malaria and other diseases, in order to target interventions and identify environmental risk factors. The increasing availability of very-high-resolution drone data provides new opportunities to find and characterize these vector breeding sites. Within this study, drone images from two malaria-endemic regions in Burkina Faso and Côte d’Ivoire were assembled and labeled using open-source tools. We developed and applied a workflow using region-of-interest-based and deep learning methods to identify land cover types associated with vector breeding sites from very-high-resolution natural color imagery. Analysis methods were assessed using cross-validation and achieved maximum Dice coefficients of 0.68 and 0.75 for vegetated and non-vegetated water bodies, respectively. This classifier consistently identified the presence of other land cover types associated with the breeding sites, obtaining Dice coefficients of 0.88 for tillage and crops, 0.87 for buildings and 0.71 for roads. This study establishes a framework for developing deep learning approaches to identify vector breeding sites and highlights the need to evaluate how results will be used by control programs.

28 January 2021 in PLOS ONE
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Journal Article
Open access
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HAHugo Alatrista-Salas
Hugo Alatrista-Salas
VGVincent Gauthier
Vincent Gauthier
MCMiguel Núñez del Prado Cortez
Miguel Núñez del Prado Cortez
MBMonique Becker
Monique Becker
El Niño is an extreme weather event featuring unusual warming of surface waters in the eastern equatorial Pacific Ocean. This phenomenon is characterized by heavy rains and floods that negatively affect the economic activities of the impacted areas. Understanding how this phenomenon influences consumption behavior at different granularity levels is essential for recommending strategies to normalize the situation. With this aim, we performed a multi-scale analysis of data associated with bank transactions involving credit and debit cards. Our findings can be summarized into two main results: Coarse-grained analysis reveals the presence of the El Niño phenomenon and the recovery time in a given territory, while fine-grained analysis demonstrates a change in individuals’ purchasing patterns and in merchant relevance as a consequence of the climatic event. The results also indicate that society successfully withstood the natural disaster owing to the economic structure built over time. In this study, we present a new method that may be useful for better characterizing future extreme events.

1 November 2021 in Journal of Environmental and Public Health
Verified
Journal Article
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IBIsabel Byrne
Isabel Byrne
KCKallista Chan
Kallista Chan
EMEdgar Manrique
Edgar Manrique
JLJo Lines
Jo Lines
RWRosine Z. Wolie
Rosine Z. Wolie
KFKimberly M. Fornace
Kimberly M. Fornace
Land-use practices such as agriculture can impact mosquito vector breeding ecology, resulting in changes in disease transmission. The typical breeding habitats of Africas second most important malaria vector Anopheles funestus are large, semipermanent water bodies, which make them potential candidates for targeted larval source management. This is a technical workflow for the integration of drone surveys and mosquito larval sampling, designed for a case study aiming to characterise An. funestus breeding sites near two villages in an agricultural setting in Côte dIvoire. Using satellite remote sensing data, we developed an environmentally and spatially representative sampling frame and conducted paired mosquito larvae and drone mapping surveys from June to August 2021. To categorise the drone imagery, we also developed a land cover classification scheme with classes relative to An. funestus breeding ecology. We sampled 189 potential breeding habitats, of which 119 (63) were positive for the Anopheles genus and nine (4.8) were positive for An. funestus. We mapped 30.42km2 of the region of interest including all water bodies which were sampled for larvae. These data can be used to inform targeted vector control efforts, although its generalisability over a large region is limited by the fine-scale nature of this study area. This paper develops protocols for integrating drone surveys and statistically rigorous entomological sampling, which can be adjusted to collect data on vector breeding habitats in other ecological contexts. Further research using data collected in this study can enable the development of deep-learning algorithms for identifying An. funestus breeding habitats across rural agricultural landscapes in Côte dIvoire and the analysis of risk factors for these sites.

1 January 2012 in Lecture Notes in Computer Science
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Book Chapter
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HAHugo Alatrista-Salas
Hugo Alatrista-Salas
SBSandra Bringay
Sandra Bringay
FFFrédéric Flouvat
Frédéric Flouvat
NSNazha Selmaoui-Folcher
Nazha Selmaoui-Folcher
MTMaguelonne Teisseire
Maguelonne Teisseire