247 research outputs found
Direct and inverse StaeblerWronski effects observed in carbon-doped hydrogenated amorphous silicon photo-detectors
No full textArce, P., Barcala, J.M., Calvo, E., Ferrando, A., Josa, M.I., Molinero, A., Navarrete, J., Oller, J.C., Yuste, C., Brochero, J., Caldern, A., Fernndez, M.G., Gmez, G., Gonzlez-Snchez, F.J., Martnez-Rivero, C., Matorras, F., Rodrigo, T., Ruiz-Rbol, P., Scodellaro, L., Sobrn, M., Vila, I., Virto, A.L., Fernndez, J
Fragmento de predela de un retablo de alabastro, atribuido a Pere Oller
No full textL’escultor gòtic gironí Pere Oller (1395- 1444), un dels artistes més representatius de l’estil gòtic internacional, és l’autor del retaule major de la catedral de Vic (1420) i va rebre el 1417 l’encàrrec de llavorar la tomba de Ferran I d’Antequera al panteó reial del monestir de Santa Maria de Poblet. Després d’haver dut a terme el seu aprenentatge de l’ofici a Barcelona, al costat de Pere Sanglada, l’introductor de les novetats del gòtic internacional en matèria d’escultura a la ciutat comtal, es va establir a Girona, on va deixar diverses mostres del seu art, entre les quals destaca el relleu recentment adquirit pel MNAC, que hom suposa pertanyent a un retaule que l’artista havia contractat el 1415 pel convent del Carme. Altres fragments conservats també podien haver format part de la mateixa obra.The Gothic sculptor from Girona Pere Oller (1395-1444), one of the major exponents of the International Gothic style, is the author of the main altarpiece in Vic Cathedral (1420). In 1417, he was commissioned to work on the tomb of King Ferdinand I of Antequera at the royal pantheon of the Monastery of Santa Maria de Poblet. Subsequent to completing his learning of the trade in Barcelona, alongside Pere Sanglada, who introduced International Gothic innovations in sculpture there, he settled in Girona, where he left several examples of his art, noteworthy among which is the relief recently acquired by MNAC. The relief is believed to have belonged to an altarpiece the artist commissioned in 1415 for the Carme convent. Other conserved fragments could also have formed part of the same work.El escultor gótico gerundense Pere Oller (1395-1444), uno de los artistas más representativos del estilo gótico internacional, es el autor del retablo mayor de la catedral de Vic (1420) y recibió en 1417 el encargo de labrar la tumba de Fernando I de Antequera en el panteón real del monasterio de Santa Maria de Poblet. Una vez hubo completado el aprendizaje del oficio en Barcelona, al lado Pere Sanglada, el introductor de las novedades del gótico internacional en materia de escultura en la ciudad condal, se estableció en Girona, donde dejó varias muestras de su arte, entre las que destaca el relieve recientemente adquirido por el MNAC, que se supone pertenece a un retablo que el artista había contratado en 1415 para el convento del Carmen. Otros fragmentos conservados también podían haber formado parte de la misma obra
The network of photodetectors and diode lasers of the CMS Link alignment system
No full textArce, P., Barcala, J.M., Calvo, E., Ferrando, A., Josa, M.I., Molinero, A., Navarrete, J., Oller, J.C., Brochero, J., Calderón, A., Fernández, M.G., Gómez, G., González-Sánchez, F.J., Martínez-Rivero, C., Matorras, F., Rodrigo, T., Ruiz-Árbol, P., Scodellaro, L., Sobrón, M., Vila, I., Virto, A.L., Fernández, J., Raics, P., Szabó, Z., Trócsnyi, Z., Ujvári, B., Zilizi, G., Béni, N., Christian, G., Imrek, J., Molnar, J., Novak, D., Pálinkás, J., Székely, G., Szillási, Z., Bencze, G.L., Vestergombi, G., Benettoni, M., Gasparini, F., Montecassiano, F., Rampazzo, M., Zago, M., Benvenuti, A., Reithler, H., Jiang, C
XQuAD-ca
No full textIf you use this resource in your work, please cite our latest paper:
@inproceedings{armengol-estape-etal-2021-multilingual,
title = "Are Multilingual Models the Best Choice for Moderately Under-resourced Languages? {A} Comprehensive Assessment for {C}atalan",
author = "Armengol-Estap{\'e}, Jordi and
Carrino, Casimiro Pio and
Rodriguez-Penagos, Carlos and
de Gibert Bonet, Ona and
Armentano-Oller, Carme and
Gonzalez-Agirre, Aitor and
Melero, Maite and
Villegas, Marta",
booktitle = "Findings of the Association for Computational Linguistics: ACL-IJCNLP 2021",
month = aug,
year = "2021",
address = "Online",
publisher = "Association for Computational Linguistics",
url = "https://aclanthology.org/2021.findings-acl.437",
doi = "10.18653/v1/2021.findings-acl.437",
pages = "4933--4946",
}
Professional translation into Catalan of XQuAD dataset (https://github.com/deepmind/xquad).
XQuAD (Cross-lingual Question Answering Dataset) is a benchmark dataset for evaluating cross-lingual question answering performance. The dataset consists of a subset of 240 paragraphs and 1190 question-answer pairs from the development set of SQuAD v1.1 (Rajpurkar et al., 2016) together with their professional translations into ten languages: Spanish, German, Greek, Russian, Turkish, Arabic, Vietnamese, Thai, Chinese, and Hindi. Rumanian was added later. We added the 13th language to the corpus using also professional native catalan translators.
XQuAD and XQuAD-Ca datasets are released under CC-by-sa licence
VilaQuAD: an extractive QA dataset from Catalan newswire
No full textIf you use this resource in your work, please cite our latest paper:
@inproceedings{armengol-estape-etal-2021-multilingual,
title = "Are Multilingual Models the Best Choice for Moderately Under-resourced Languages? {A} Comprehensive Assessment for {C}atalan",
author = "Armengol-Estap{\'e}, Jordi and
Carrino, Casimiro Pio and
Rodriguez-Penagos, Carlos and
de Gibert Bonet, Ona and
Armentano-Oller, Carme and
Gonzalez-Agirre, Aitor and
Melero, Maite and
Villegas, Marta",
booktitle = "Findings of the Association for Computational Linguistics: ACL-IJCNLP 2021",
month = aug,
year = "2021",
address = "Online",
publisher = "Association for Computational Linguistics",
url = "https://aclanthology.org/2021.findings-acl.437",
doi = "10.18653/v1/2021.findings-acl.437",
pages = "4933--4946",
}
Dataset de QA extractiu amb 6282 parells de pregunta-resposta desenvolupats a partir de paràgrafs del diari en línia Vilaweb (https://www.vilaweb.cat) usats sota llicència CC-BY-NC-ND 4.0.
This dataset contains 2095 of Catalan language news articles along with 1 to 5 questions referring to each fragment (or context).
VilaQuad articles are extracted from the daily Vilaweb (www.vilaweb.cat) and used under CC-by-nc-sa-nd (https://creativecommons.org/licenses/by-nc-nd/3.0/deed.ca) licence.
This dataset can be used to build extractive-QA and Language Models.
Funded by the Generalitat de Catalunya, Departament de Polítiques Digitals i Administració Pública (AINA), MT4ALL and Plan de Impulso de las Tecnologías del Lenguaje (Plan TL)
TeCla: Text Classification Catalan dataset
No full textIf you use this resource in your work, please cite our latest paper:
@inproceedings{armengol-estape-etal-2021-multilingual,
title = "Are Multilingual Models the Best Choice for Moderately Under-resourced Languages? {A} Comprehensive Assessment for {C}atalan",
author = "Armengol-Estap{\'e}, Jordi and
Carrino, Casimiro Pio and
Rodriguez-Penagos, Carlos and
de Gibert Bonet, Ona and
Armentano-Oller, Carme and
Gonzalez-Agirre, Aitor and
Melero, Maite and
Villegas, Marta",
booktitle = "Findings of the Association for Computational Linguistics: ACL-IJCNLP 2021",
month = aug,
year = "2021",
address = "Online",
publisher = "Association for Computational Linguistics",
url = "https://aclanthology.org/2021.findings-acl.437",
doi = "10.18653/v1/2021.findings-acl.437",
pages = "4933--4946",
}
Corpus de notícies en català per a classificació textual, extret del web de l'Agència Catalana de Notícies sota llicència CC-BY-NC-ND
TeCla is a Catalan News corpus for thematic Text Classification tasks. It contains 153.265 articles classified under 30 different categories.
The source data is crawled from the ACN (Catalan News Agency) site: http://www.acn.cat, and used under CC-BY-NC-ND 4.0 licence. The dataset is released under the same licence, and is intended exclusively for training Machine Learning models.
This dataset was developed by BSC TeMU as part of the AINA project, and intended as part of CLUB (Catalan Language Understanding Benchmark)
Survival analysis with censored data: a further twist on ignorability conditions
No full text© 2024 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License (http://creativecommons.org/licenses/by-nc-nd/4.0/),A key assumption for the application of methods concerning censored data is that the random nature of the censoring mechanism should be ignorable when making likelihood-based inferences. The constant-sum property is an ignorability assumption that is critical for the correct use of a simplified version of the likelihood function and for the identifiability of the survival function [Oller R, Gómez G, Calle ML. Interval censoring: identifiability and the constant-sum property. Biometrika. 2007;94(1):61–70]. It has been proven to be weaker than the assumption of independence between the lifetime variable and the assessment process that leads to censored data. An important caveat is that the theoretical framework established in the class of constant-sum censoring models requires full knowledge of the support of the lifetime variable. In the present work we investigate the consequences of a wrong specification of the support. One might naively expect that this information is not necessary and that, for instance, the estimation of the survival function would assign null or almost null probabilities to regions outside the support. We reveal via examples that this premise is generally true but there are also several exceptions. To shed light on this issue, we introduce a new ignorability condition that extends the constant-sum property and removes the knowledge of the support from the equation. We also show that the independence assumption is stronger than the new extended constant-sum condition.This research was funded in whole, or in part, by the Ministerio de Ciencia e Innovación (Spain) [PID2019-104830RBI00/ DOI (AEI): 10.13039/501100011033] and by the Generalitat de Catalunya [01421 SGR-Cat 2021 and 00402 SGR-Cat 2021].Peer ReviewedPostprint (published version
TECA: Textual Entailment Catalan dataset
No full textIf you use this resource in your work, please cite our latest paper:
@inproceedings{armengol-estape-etal-2021-multilingual,
title = "Are Multilingual Models the Best Choice for Moderately Under-resourced Languages? {A} Comprehensive Assessment for {C}atalan",
author = "Armengol-Estap{\'e}, Jordi and
Carrino, Casimiro Pio and
Rodriguez-Penagos, Carlos and
de Gibert Bonet, Ona and
Armentano-Oller, Carme and
Gonzalez-Agirre, Aitor and
Melero, Maite and
Villegas, Marta",
booktitle = "Findings of the Association for Computational Linguistics: ACL-IJCNLP 2021",
month = aug,
year = "2021",
address = "Online",
publisher = "Association for Computational Linguistics",
url = "https://aclanthology.org/2021.findings-acl.437",
doi = "10.18653/v1/2021.findings-acl.437",
pages = "4933--4946",
}
TECA són dos subsets de TE en Català, catalan_TE1 i vilaweb_TE, que contenen 14997 i 6166 parells de premisses i hipòtesis, anotades segons la relació d'inferència que tenen (implicació, contradicció o neutra).
TECa contains two Catalan TE sub-datasets, catalan_TE1 and vilaweb_TE, containing 14997 and 6166 annotated pairs of sentences.
"Textual entailment (TE) in natural language processing is a directional relation between text fragments. The relation holds whenever the truth of one text fragment follows from another text. In the TE framework, the entailing and entailed texts are termed text (t) and hypothesis (h), respectively." From Wikpedia.
In TECa datasets, each sentence has three hypotheses, annotated as follows:
* "0": positive TE (Inference, text entails hypothesis)
* "1": non-TE (Neutral, text does not entail nor contradict)
* "2": negative TE (Contradiction, text contradicts hypothesis).
Source sentences are extracted from the Catalan Textual Corpus (https://doi.org/10.5281/zenodo.4519349), and from Vilaweb newswire.
Both sub-datasets are released under CC-by-4.0 licence
Thrusting System for Electrostatic Space Debris Control
No full textThe Geosynchronous Large Debris Reorbiter concept is an active debris removal method proposed for defunct satellites in geostationary orbit. This method uses the electrostatic tractor (or tug), which is a spacecraft that controls a mutual electrostatic force on a target and uses this force to slowly accelerate the target towards or away from the tug. The challenging task of station-keeping a few dozen meters away between the tug and the debris spacecraft must be done with thrusters that can only intermittently fire. In between the firing, the electron gun is used to control the tug and debris potential. This research investigates different thruster options and discrete control algorithms for this application of the electrostatic tractor. The objective is to devise and simulate a reliable propulsion system for the geosynchronous large debris reorbiter concept by simulating and analyzing different micro-propulsion thrusting options and developing a discrete thrusting solution using pulsed thrust and active charging control.Aerospace Engineerin
Income, distance and spatial effects in the Monocentric model. The Barcelona Metropolitan Area case.
No full textThis paper focuses on the income distribution of households in Barcelona Metropolitan Area. For this purpose we use the Monocentric model. As the basic model does not have direct implications for this distribution, we survey the extensions of the model that have been used in empirical literature. One of the most promising ways is to introduce externalities in the decision process; they can result directly from exogenous amenities (natural traits of urban area) or be created directly by other agents’ decisions. In this case, a spatial lag model and spatial error model are suited for the empirical purposes. We present evidence that any model with spatial effects improves significantly the econometric results.
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