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194 results on '"Sierra, Gerardo"'

3. First light simultaneous triple-channel optical observations of the OPTICAM system at the OAN-SPM

Author

Castro, Angel, Michel, Raúl, Castro Segura, Noel, Altamirano, Diego, Tejada, Carlos, Herrera, Joel, Colorado, Enrique, Sierra, Gerardo, Altamirano-Dévora, Liliana, Echevarría, Juan, Sloot, Rasjied, Wijnands, Rudy, Zavala, Iván, Rojas, David, Hernández Santisteban, Juan V., Vincentelli, Federico, Hernández-Landa, Javier A., Wang, Song, Fuentes, Melissa, Gandhi, Poshak, Silva-Cabrera, José S., Ramírez Vélez, Julio, García, Benjamín, Guisa, Gerardo, Gómez Maqueo Chew, Yilen, Montalvo, Felipe, and Valenzuela, Francisco

Published
2024
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5. WCN24-2018 THE DAILY CHALLENGE OF A PUBLIC HOSPITAL IN THE INTERACTIONS BETWEEN THE HEART AND MBD IN HEMODIALYSIS

Author

Alfaro, Valeria, primary, Vallve, Cristina, additional, Ana, Arcamone, additional, Boubee, Sebastian, additional, Sierra, Gerardo, additional, Corradino, Claudio, additional, Garcia, Estefania, additional, Brasil, Thayana, additional, Zurita, Francesco, additional, Bombicino, Damian, additional, Cachambi, Elizabeth, additional, Paucar, Patricia, additional, and Pilco, Jackeline, additional

Published
2024
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6. WCN24-1363 ASYMPTOMATIC HYPONATREMIA AND ASSOCIATION WITH PERITONITIS IN PERITONEAL DIALYSIS

Author

Parodi, Francesco Zurita, primary, Boubee, Sebastian, additional, Vallve, Cristina, additional, Arcamone, Ana, additional, Brasil, Thayana, additional, Rios, Celeste, additional, Bombicino, Damian, additional, Sierra, Gerardo, additional, Alfaro, Valeria, additional, Cachambi, Elizabeth, additional, Corradino, Claudio, additional, Pilco, Jacqueline, additional, Paredes, Denise, additional, and Paucar, Patricia, additional

Published
2024
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7. Challenges of language technologies for the indigenous languages of the Americas

Author

Mager, Manuel, Gutierrez-Vasques, Ximena, Sierra, Gerardo, and Meza, Ivan

Subjects
Computer Science - Computation and Language
Abstract

Indigenous languages of the American continent are highly diverse. However, they have received little attention from the technological perspective. In this paper, we review the research, the digital resources and the available NLP systems that focus on these languages. We present the main challenges and research questions that arise when distant languages and low-resource scenarios are faced. We would like to encourage NLP research in linguistically rich and diverse areas like the Americas., Comment: In Proceedings of the 27th International Conference on Computational Linguistics (COLING 2018)

Published
2018

8. Unsupervised Sentence Representations as Word Information Series: Revisiting TF--IDF

Author

Arroyo-Fernández, Ignacio, Méndez-Cruz, Carlos-Francisco, Sierra, Gerardo, Torres-Moreno, Juan-Manuel, and Sidorov, Grigori

Subjects
Computer Science - Computation and Language
Abstract

Sentence representation at the semantic level is a challenging task for Natural Language Processing and Artificial Intelligence. Despite the advances in word embeddings (i.e. word vector representations), capturing sentence meaning is an open question due to complexities of semantic interactions among words. In this paper, we present an embedding method, which is aimed at learning unsupervised sentence representations from unlabeled text. We propose an unsupervised method that models a sentence as a weighted series of word embeddings. The weights of the word embeddings are fitted by using Shannon's word entropies provided by the Term Frequency--Inverse Document Frequency (TF--IDF) transform. The hyperparameters of the model can be selected according to the properties of data (e.g. sentence length and textual gender). Hyperparameter selection involves word embedding methods and dimensionalities, as well as weighting schemata. Our method offers advantages over existing methods: identifiable modules, short-term training, online inference of (unseen) sentence representations, as well as independence from domain, external knowledge and language resources. Results showed that our model outperformed the state of the art in well-known Semantic Textual Similarity (STS) benchmarks. Moreover, our model reached state-of-the-art performance when compared to supervised and knowledge-based STS systems.

Published
2017

9. A German Corpus for Text Similarity Detection Tasks

Author

Torres-Moreno, Juan-Manuel, Sierra, Gerardo, and Peinl, Peter

Subjects
Computer Science - Information Retrieval, Computer Science - Computation and Language
Abstract

Text similarity detection aims at measuring the degree of similarity between a pair of texts. Corpora available for text similarity detection are designed to evaluate the algorithms to assess the paraphrase level among documents. In this paper we present a textual German corpus for similarity detection. The purpose of this corpus is to automatically assess the similarity between a pair of texts and to evaluate different similarity measures, both for whole documents or for individual sentences. Therefore we have calculated several simple measures on our corpus based on a library of similarity functions., Comment: 1 figure; 13 pages

Published
2017

10. Efficient Social Network Multilingual Classification using Character, POS n-grams and Dynamic Normalization

Author

González-Gallardo, Carlos-Emiliano, Torres-Moreno, Juan-Manuel, Rendón, Azucena Montes, and Sierra, Gerardo

Subjects
Computer Science - Information Retrieval, Computer Science - Computation and Language, Computer Science - Social and Information Networks
Abstract

In this paper we describe a dynamic normalization process applied to social network multilingual documents (Facebook and Twitter) to improve the performance of the Author profiling task for short texts. After the normalization process, $n$-grams of characters and n-grams of POS tags are obtained to extract all the possible stylistic information encoded in the documents (emoticons, character flooding, capital letters, references to other users, hyperlinks, hashtags, etc.). Experiments with SVM showed up to 90% of performance., Comment: 8 pages, 6 figures, Conference paper

Published
2017

12. Evaluation of Similarity Measures in a Benchmark for Spanish Paraphrasing Detection : 19th Mexican International Conference on Artificial Intelligence

Author

Gómez-Adorno, Helena, Bel-Enguix, Gemma, Sierra, Gerardo, Torres-Moreno, Juan-Manuel, Martinez, Renata, Serrano, Pedro, 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, Martínez-Villaseñor, Lourdes, editor, Herrera-Alcántara, Oscar, editor, Ponce, Hiram, editor, and Castro-Espinoza, Félix A., editor

Published
2020
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15. Regroupement s\'emantique de d\'efinitions en espagnol

Author

Sierra, Gerardo, Torres-Moreno, Juan-Manuel, and Molina, Alejandro

Subjects
Computer Science - Information Retrieval, Computer Science - Computation and Language
Abstract

This article focuses on the description and evaluation of a new unsupervised learning method of clustering of definitions in Spanish according to their semantic. Textual Energy was used as a clustering measure, and we study an adaptation of the Precision and Recall to evaluate our method., Comment: 11 pages, in French, 5 figures. Workshop Evaluation des m\'ethodes d'Extraction de Connaissances dans les Donn\'ees EvalECD EGC'10, 2010 Tunis

Published
2015

19. Towards a Natural Language Compiler

Author

Zúñiga, Angel, Sierra, Gerardo, Bel-Enguix, Gemma, Galicia-Haro, Sofía N., 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, Batyrshin, Ildar, editor, Martínez-Villaseñor, María de Lourdes, editor, and Ponce Espinosa, Hiram Eredín, editor

Published
2018
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20. Criminal Events Detection in News Stories Using Intuitive Classification

Author

Moreno-Jiménez, Luis-Gil, Torres-Moreno, Juan-Manuel, Castro-Sánchez, Noé Alejandro, Nava-Zea, Alondra, Sierra, Gerardo, 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, Castro, Félix, editor, Miranda-Jiménez, Sabino, editor, and González-Mendoza, Miguel, editor

Published
2018
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21. Sentence Compression in Spanish driven by Discourse Segmentation and Language Models

Author

Molina, Alejandro, Torres-Moreno, Juan-Manuel, da Cunha, Iria, SanJuan, Eric, and Sierra, Gerardo

Subjects
Computer Science - Computation and Language, Computer Science - Information Retrieval
Abstract

Previous works demonstrated that Automatic Text Summarization (ATS) by sentences extraction may be improved using sentence compression. In this work we present a sentence compressions approach guided by level-sentence discourse segmentation and probabilistic language models (LM). The results presented here show that the proposed solution is able to generate coherent summaries with grammatical compressed sentences. The approach is simple enough to be transposed into other languages., Comment: 7 pages, 3 tables

Published
2012

25. LEXIK. An Integrated System for Specialized Terminology

Author

Sierra, Gerardo, Lázaro, Jorge, Bel-Enguix, Gemma, 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, Sidorov, Grigori, editor, and Herrera-Alcántara, Oscar, editor

Published
2017
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26. Opticam Triple-Channel Astronomical Image Acquisition Control Software and External Triggering Synchronization System

Author

Castro, Angel, primary, Zavala, Iván, additional, Colorado, Enrique, additional, Herrera, Joel, additional, Castro Segura, Noel, additional, Michel, Raul, additional, Altamirano, Diego, additional, Altamirano-Dévora, Liliana, additional, Sierra, Gerardo, additional, Echevaría, Juan, additional, and Hernandez-Landa, Javier, additional

Published
2023
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29. Overview of HOMO-MEX at Iberlef 2023: Hate speech detection in Online Messages directed Towards the MEXican Spanish speaking LGBTQ+ population.

Author

Bel-Enguix, Gemma, Gómez-Adorno, Helena, Sierra, Gerardo, Vásquez, Juan, Andersen, Scott Thomas, and Ojeda-Trueba, Sergio

Subjects
HATE speech, SPANISH language, NATURAL language processing, PHOBIAS, DEAF children
Abstract

Copyright of Procesamiento del Lenguaje Natural is the property of Sociedad Espanola para el Procesamiento del Lenguaje Natural and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2023
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30. Sustainable use of water from a tropical aquifer.

Author

Huguet‐Sierra, Gerardo Arturo, Márquez‐Romance, Adriana Mercedes, Guevara‐Pérez, Edilberto, Pérez‐Pacheco, Sergio Alejandro, and Buroz‐Castillo, Eduardo

Subjects
WATER use, AQUIFERS, WATERSHEDS, BRACKISH waters, WATER quality, URBAN growth, SALTWATER encroachment, AQUIFER pollution
Abstract

The objective of this work is to analyze and interpret the components or hydrogeological, physical, and chemical variables of the San Diego aquifer to describe it and explain its influence on the sustainable use of groundwater for the providing of this locality. The San Diego municipality covers most of the area of the aquifer and is an area of high urban development that currently needs the contribution of groundwater due to the deficit presented by the main supply from the Central Regional System. Said aquifer is a set of geological strata located within the limits of the San Diego River basin, in the state of Carabobo, which are capable of storing groundwater and transmitting it. Data on lithology, porosity, and pumping level were investigated, which allows calculating an estimate of the volume of water available in the aquifer. Regarding the quality of the water, the data on hardness, chlorides, sulfates, nitrates, conductivity, calcium, magnesium, and pH, show that the water towards the center and north of the aquifer is of good quality, being able to classify it as type 1A, while toward the southern end—this is of lower quality, where the mineral parameters are higher, which is related to the probable intrusion of brackish water from Lake Valencia. It is concluded by establishing that the volume of groundwater, its availability, extraction feasibility, and its quality, make it suitable for urban supply and that said extraction is sustainable. But a better‐integrated type of management must be designed, considering the contribution of the Regional System of the Center and the adequacy of the distribution networks. [ABSTRACT FROM AUTHOR]

Published
2023
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31. Extrinsic Evaluation on Automatic Summarization Tasks: Testing Affixality Measurements for Statistical Word Stemming

Author

Méndez-Cruz, Carlos-Francisco, Torres-Moreno, Juan-Manuel, Medina-Urrea, Alfonso, Sierra, Gerardo, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Goebel, Randy, editor, Siekmann, Jörg, editor, Wahlster, Wolfgang, editor, Batyrshin, Ildar, editor, and Mendoza, Miguel González, editor

Published
2013
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32. A Symbolic Approach for Automatic Detection of Nuclearity and Rhetorical Relations among Intra-sentence Discourse Segments in Spanish

Author

da Cunha, Iria, SanJuan, Eric, Torres-Moreno, Juan-Manuel, Cabré, M. Teresa, Sierra, Gerardo, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, and Gelbukh, Alexander, editor

Published
2012
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33. Discourse Segmentation for Sentence Compression

Author

Molina, Alejandro, Torres-Moreno, Juan-Manuel, SanJuan, Eric, da Cunha, Iria, Sierra, Gerardo, Velázquez-Morales, Patricia, 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, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Goebel, Randy, editor, Siekmann, Jörg, editor, Wahlster, Wolfgang, editor, Batyrshin, Ildar, editor, and Sidorov, Grigori, editor

Published
2011
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34. Automatic Specialized vs. Non-specialized Sentence Differentiation

Author

da Cunha, Iria, Cabré, M. Teresa, SanJuan, Eric, Sierra, Gerardo, Torres-Moreno, Juan Manuel, Vivaldi, Jorge, 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, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, and Gelbukh, Alexander, editor

Published
2011
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35. ECODE: A Definition Extraction System

Author

Alarcón, Rodrigo, Sierra, Gerardo, Bach, Carme, 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, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Goebel, Randy, editor, Siekmann, Jörg, editor, Wahlster, Wolfgang, editor, Vetulani, Zygmunt, editor, and Uszkoreit, Hans, editor

Published
2009
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36. An Improved Automatic Term Recognition Method for Spanish

Author

Barrón-Cedeño, Alberto, Sierra, Gerardo, Drouin, Patrick, Ananiadou, Sophia, 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, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, and Gelbukh, Alexander, editor

Published
2009
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41. Calibration and validation of models to estimate the hydraulic parameters of a confined aquifer in a tropical region.

Author

Arturo Huguet-Sierra, Gerardo, Mercedes Márquez-Romance, Adriana, Guevara-Pérez, Edilberto, Alejandro Pérez-Pacheco, Sergio, and Buroz-Castillo, Eduardo

Subjects
*HYDRAULIC models, *AQUIFERS, *MODEL validation, *CALIBRATION, *RESERVOIR drawdown, *WATER levels
Abstract

This article deals with the calibration and validation of models for water yield from a confined aquifer in a tropical region. From 2015 to 2019, 20 variable flow pumping tests were carried out. The average pumping flows varied between 0.07 and 17.4 L/s; the average drawdown of the water levels, between 5.99 and 50.94 m; the values of transmissivity and storage coefficient were lower than 77 m²/day and 6 x 10 -5, for probability of non-exceedance of 85%. In the calibration stage, the mean values of the coefficients of the proposed models a and b were in the order of 10¹ and 10³. The determination coefficients obtained in the statistical adjustment of the proposed models are satisfactory, they varied between 76 and 85%. The validation stage revealed that the models need to be tested with a larger number of data. [ABSTRACT FROM AUTHOR]

Published
2023
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47. Overview of PAR-MEX at Iberlef 2022: Paraphrase Detection in Spanish Shared Task.

Author

Bel-Enguix, Gemma, Sierra, Gerardo, Gómez-Adorno, Helena, Torres-Moreno, Juan-Manuel, Ortiz-Barajas, Jesus-German, and Vásquez, Juan

Subjects
SPANISH language, NATURAL language processing, PARAPHRASE, TASKS
Abstract

Copyright of Procesamiento del Lenguaje Natural is the property of Sociedad Espanola para el Procesamiento del Lenguaje Natural and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2022
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