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1. Automatic forest change detection through a bi-annual time series of satellite imagery: Toward production of an integrated land cover map

Author

Alonso L., Picos J., and Armesto J.

Subjects
Forest, Disturbances, Land cover change, Sentinel-2, Small parcels, Physical geography, GB3-5030, Environmental sciences, GE1-350
Abstract

Land cover mapping is fundamental for national and international agencies to monitor forest resources. However, monitoring forest disturbances by direct comparison of these maps poses several difficulties and challenges. As a result, different methodologies have been explored to detect forest disturbances. However, most of them cannot be fully integrated with land cover map production since they require additional input data, while others are not suitable for monitoring small land parcels. This study presents a methodology that fulfils the need to integrate land cover mapping with land cover change detection. Specifically, this methodology was designed to complement the Sentinel-2-based land cover mapping used in Galicia, northwest Spain, a region characterized by small land parceling. First, two previously obtained land cover maps from 2019 and 2020 were compared to identify all the pixels with potential land cover changes using QGIS. The behavior of spectral indexes in a time series were then analyzed to identify which of the previously identified pixels correspond to forest disturbances. This step was implemented in the software R. Using the Normalized Difference Vegetation Index (NDVI) to detect different land cover changes it was obtained an overall accuracy of 82%, considering the existence of varying phenologies, diverse topographic conditions, and areas with a high level of stand fragmentation. This study could help agencies that have already developed their own land cover maps to easily advance the integration of their maps with land cover change detection, since this technique can be applied with any land cover mapping methodology based on multitemporal analysis of satellite images, without the need for additional input data.

Published
2023
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2. La investigación como parte de la formación de estudiantes de la FIC: relato de una experiencia de integración de funciones universitarias

Author

Cabrera Castiglioni, Magela, Cabrera Castiglioni, M., Alonso, Lucía, Alonso, L., Saraiva Cruz, Ignacio, Saraiva Cruz, I., Canzani Cuello, Javier, Canzani Cuello, J., and Facultad de Información y Comunicación, FIC

Subjects
AZ. None of these, but in this section., BJ. Communication, BD. Information society., CD. User training, promotion, activities, education.
Abstract

This paper presents an experience of participation of undergraduate students in a research activity framed in the R&D project called: "Informative coverage and processes of (dis)information in the uruguayan media", particularly presents some activities made under the project objective to identify, describe, and analyze processes of (dis)information that occur both at the level of traditional media and social networks. To achieve this objective, various activities were carried out, including the one presented here. During the course of the activity. that had an approach of different dimensions, it was facilitated that participating students were in a position to make contact with the proposed methodology for the identification, monitoring and verification of disinformation processes; observe various processes of disinformation in national media and networks; analyze and check the disinformation processes identified and collaborate, through discussion and exchange, in the generation of media and information literacy guidelines. Among the results of the experience, it stands out, the feasibility of developing research activities with the participation of students and that it is a learning instance in itself and, the possibility of integrating university teaching-research functions. Also, the fact that the topic of the project is important for the discipline and must be worked on.

Published
2023

4. Proton acceleration in thermonuclear nova explosions revealed by gamma rays

Author

MAGIC Collaboration, Acciari, V. A., Ansoldi, S., Antonelli, L. A., Engels, A. Arbet, Artero, M., Asano, K., Baack, D., Babić, A., Baquero, A., de Almeida, U. Barres, Barrio, J. A., Batković, I., González, J. Becerra, Bednarek, W., Bellizzi, L., Bernardini, E., Bernardos, M., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bökenkamp, H., Bonnoli, G., Bošnjak, Ž., Busetto, G., Carosi, R., Ceribella, G., Cerruti, M., Chai, Y., Chilingarian, A., Cikota, S., Colak, S. M., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D'Amico, G., D'Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Del Popolo, A., Delfino, M., Delgado, J., Mendez, C. Delgado, Depaoli, D., Di Pierro, F., Di Venere, L., Espiñeira, E. Do Souto, Prester, D. Dominis, Donini, A., Dorner, D., Doro, M., Elsaesser, D., Ramazani, V. Fallah, Alonso, L. Fariña, Fattorini, A., Fonseca, M. V., Font, L., Fruck, C., Fukami, S., Fukazawa, Y., López, R. J. García, Garczarczyk, M., Gasparyan, S., Gaug, M., Giglietto, N., Giordano, F., Gliwny, P., Godinović, N., Green, J. G., Green, D., Hadasch, D., Hahn, A., Hassan, T., Heckmann, L., Herrera, J., Hoang, J., Hrupec, D., Hütten, M., Inada, T., Ishio, K., Iwamura, Y., Martínez, I. Jiménez, Jormanainen, J., Jouvin, L., Kerszberg, D., Kobayashi, Y., Kubo, H., Kushida, J., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Linhoff, L., Lombardi, S., Longo, F., López-Coto, R., López-Moya, M., López-Oramas, A., Loporchio, S., Fraga, B. Machado de Oliveira, Maggio, C., Majumdar, P., Makariev, M., Mallamaci, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Aguilar, A. Mas, Mazin, D., Menchiari, S., Mender, S., Mićanović, S., Miceli, D., Miener, T., Miranda, J. M., Mirzoyan, R., Molina, E., Moralejo, A., Morcuende, D., Moreno, V., Moretti, E., Nakamori, T., Nava, L., Neustroev, V., Rosillo, M. Nievas, Nigro, C., Nilsson, K., Nishijima, K., Noda, K., Nozaki, S., Ohtani, Y., Oka, T., Otero-Santos, J., Paiano, S., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Pavletić, L., Peñil, P., Persic, M., Pihet, M., Moroni, P. G. Prada, Prandini, E., Priyadarshi, C., Puljak, I., Rhode, W., Ribó, M., Rico, J., Righi, C., Rugliancich, A., Sahakyan, N., Saito, T., Sakurai, S., Satalecka, K., Saturni, F. G., Schleicher, B., Schmidt, K., Schweizer, T., Sitarek, J., Šnidarić, I., Sobczynska, D., Spolon, A., Stamerra, A., Strišković, J., Strom, D., Strzys, M., Suda, Y., Surić, T., Takahashi, M., Takeishi, R., Tavecchio, F., Temnikov, P., Terzić, T., Teshima, M., Tosti, L., Truzzi, S., Tutone, A., Ubach, S., van Scherpenberg, J., Vanzo, G., Acosta, M. Vazquez, Ventura, S., Verguilov, V., Vigorito, C. F., Vitale, V., Vovk, I., Will, M., Wunderlich, C., Yamamoto, T., Zarić, D., Ambrosino, F., Cecconi, M., Catanzaro, G., Ferrara, C., Frasca, A., Munari, M., Giustolisi, L., Alonso-Santiago, J., Giarrusso, M., Munari, U., and Valisa, P.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

Classical novae are cataclysmic binary star systems in which the matter of a companion star is accreted on a white dwarf (WD). Accumulation of hydrogen in a layer eventually causes a thermonuclear explosion on the surface of the WD, brightening the WD to ~10^5 solar luminosities and triggering ejection of the accumulated matter.They provide extreme conditions required to accelerate particles, electrons or protons, to high energies. Here we present the detection of gamma rays by the MAGIC telescopes from the 2021 outburst of RS Ophiuchi (RS Oph), a recurrent nova with a red giant (RG) companion, that allowed us, for the first time, to accurately characterize the emission from a nova in the 60 GeV to 250 GeV energy range. The theoretical interpretation of the combined Fermi-LAT and MAGIC data suggests that protons are accelerated to hundreds of GeV in the nova shock. Such protons should create bubbles of enhanced Cosmic Ray density, on the order of 10 pc, from the recurrent novae., Comment: THIS VERSION IS AFTER THE JOURNAL REVIEW

Published
2022
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7. Probing ultracold gases using photoionization fine structure

Author

Giannakeas, P., Eiles, Matthew T., Alonso, L., Robicheaux, F., and Rost, Jan M.

Subjects
Physics - Atomic Physics, Condensed Matter - Quantum Gases, Quantum Physics
Abstract

Photoionization of atoms immersed in an environment such as an ultracold gas is investigated. We show that the interference of two ionization pathways, one passing directly to the continuum and one accounting for scattering processes between the photoelectron and a neighboring atom, produces a fine structure in the photoionization cross-section over an energy range less than 1 eV above threshold. This fine structure includes all the details of the corresponding three-body system, e.g. the interatomic distance or the scattering information of the electron-atom subsystem; therefore, photoelectrons produced in a multi-particle environment can be utilized as structural probes. As an illustration, for experimentally relevant parameters, we propose a scheme based on the photoionization of a Rydberg molecule where the low-energy electron-atom phase shifts are extracted from the fine structure spectra using neural networks., Comment: 9 pages (main text and supplemental material), 4 figures

Published
2021

10. Geometrical and spectral study of $\beta$-skeleton graphs

Author

Alonso, L., Méndez-Bermúdez, J. A., and Estrada, Ernesto

Subjects
Physics - Physics and Society, Condensed Matter - Disordered Systems and Neural Networks
Abstract

We perform an extensive numerical analysis of $\beta$-skeleton graphs, a particular type of proximity graphs. In a $\beta$-skeleton graph (BSG) two vertices are connected if a proximity rule, that depends of the parameter $\beta\in(0,\infty)$, is satisfied. Moreover, for $\beta>1$ there exist two different proximity rules, leading to lune-based and circle-based BSGs. First, by computing the average degree of large ensembles of BSGs we detect differences, which increase with the increase of $\beta$, between lune-based and circle-based BSGs. Then, within a random matrix theory (RMT) approach, we explore spectral and eigenvector properties of randomly weighted BSGs by the use of the nearest-neighbor energy-level spacing distribution and the entropic eigenvector localization length, respectively. The RMT analysis allows us to conclude that a localization transition occurs at $\beta=1$., Comment: 8 pages, 12 figures

Published
2019
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13. Proton acceleration in thermonuclear nova explosions revealed by gamma rays

Author

Acciari, V. A., Ansoldi, S., Antonelli, L. A., Arbet Engels, A., Artero, M., Asano, K., Baack, D., Babić, A., Baquero, A., Barres de Almeida, U., Barrio, J. A., Batković, I., Becerra González, J., Bednarek, W., Bellizzi, L., Bernardini, E., Bernardos, M., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bökenkamp, H., Bonnoli, G., Bošnjak, Ž., Busetto, G., Carosi, R., Ceribella, G., Cerruti, M., Chai, Y., Chilingarian, A., Cikota, S., Colak, S. M., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D’Amico, G., D’Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Del Popolo, A., Delfino, M., Delgado, J., Delgado Mendez, C., Depaoli, D., Di Pierro, F., Di Venere, L., Do Souto Espiñeira, E., Prester, D. Dominis, Donini, A., Dorner, D., Doro, M., Elsaesser, D., Fallah Ramazani, V., Fariña Alonso, L., Fattorini, A., Fonseca, M. V., Font, L., Fruck, C., Fukami, S., Fukazawa, Y., García López, R. J., Garczarczyk, M., Gasparyan, S., Gaug, M., Giglietto, N., Giordano, F., Gliwny, P., Godinović, N., Green, J. G., Green, D., Hadasch, D., Hahn, A., Hassan, T., Heckmann, L., Herrera, J., Hoang, J., Hrupec, D., Hütten, M., Inada, T., Ishio, K., Iwamura, Y., Jiménez Martínez, I., Jormanainen, J., Jouvin, L., Kerszberg, D., Kobayashi, Y., Kubo, H., Kushida, J., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Linhoff, L., Lombardi, S., Longo, F., López-Coto, R., López-Moya, M., López-Oramas, A., Loporchio, S., Machado de Oliveira Fraga, B., Maggio, C., Majumdar, P., Makariev, M., Mallamaci, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Mas Aguilar, A., Mazin, D., Menchiari, S., Mender, S., Mićanović, S., Miceli, D., Miener, T., Miranda, J. M., Mirzoyan, R., Molina, E., Moralejo, A., Morcuende, D., Moreno, V., Moretti, E., Nakamori, T., Nava, L., Neustroev, V., Nievas Rosillo, M., Nigro, C., Nilsson, K., Nishijima, K., Noda, K., Nozaki, S., Ohtani, Y., Oka, T., Otero-Santos, J., Paiano, S., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Pavletić, L., Peñil, P., Persic, M., Pihet, M., Prada Moroni, P. G., Prandini, E., Priyadarshi, C., Puljak, I., Rhode, W., Ribó, M., Rico, J., Righi, C., Rugliancich, A., Sahakyan, N., Saito, T., Sakurai, S., Satalecka, K., Saturni, F. G., Schleicher, B., Schmidt, K., Schweizer, T., Sitarek, J., Šnidarić, I., Sobczynska, D., Spolon, A., Stamerra, A., Strišković, J., Strom, D., Strzys, M., Suda, Y., Surić, T., Takahashi, M., Takeishi, R., Tavecchio, F., Temnikov, P., Terzić, T., Teshima, M., Tosti, L., Truzzi, S., Tutone, A., Ubach, S., van Scherpenberg, J., Vanzo, G., Vazquez Acosta, M., Ventura, S., Verguilov, V., Vigorito, C. F., Vitale, V., Vovk, I., Will, M., Wunderlich, C., Yamamoto, T., Zarić, D., Ambrosino, F., Cecconi, M., Catanzaro, G., Ferrara, C., Frasca, A., Munari, M., Giustolisi, L., Alonso-Santiago, J., Giarrusso, M., Munari, U., and Valisa, P.

Published
2022
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14. Weighted random--geometric and random--rectangular graphs: Spectral and eigenfunction properties of the adjacency matrix

Author

Alonso, L., Mendez-Bermudez, J. A., Gonzalez-Melendrez, A., and Moreno, Yamir

Subjects
Physics - Physics and Society
Abstract

Within a random-matrix-theory approach, we use the nearest-neighbor energy level spacing distribution $P(s)$ and the entropic eigenfunction localization length $\ell$ to study spectral and eigenfunction properties (of adjacency matrices) of weighted random--geometric and random--rectangular graphs. A random--geometric graph (RGG) considers a set of vertices uniformly and independently distributed on the unit square, while for a random--rectangular graph (RRG) the embedding geometry is a rectangle. The RRG model depends on three parameters: The rectangle side lengths $a$ and $1/a$, the connection radius $r$, and the number of vertices $N$. We then study in detail the case $a=1$ which corresponds to weighted RGGs and explore weighted RRGs characterized by $a\sim 1$, i.e.~two-dimensional geometries, but also approach the limit of quasi-one-dimensional wires when $a\gg1$. In general we look for the scaling properties of $P(s)$ and $\ell$ as a function of $a$, $r$ and $N$. We find that the ratio $r/N^\gamma$, with $\gamma(a)\approx -1/2$, fixes the properties of both RGGs and RRGs. Moreover, when $a\ge 10$ we show that spectral and eigenfunction properties of weighted RRGs are universal for the fixed ratio $r/{\cal C}N^\gamma$, with ${\cal C}\approx a$., Comment: 8 pages, 6 figures

Published
2017

21. Stem cell-like transcriptional reprogramming mediates metastatic resistance to mTOR inhibition

Author

Mateo, F, Arenas, EJ, Aguilar, H, Serra-Musach, J, de Garibay, G Ruiz, Boni, J, Maicas, M, Du, S, Iorio, F, Herranz-Ors, C, Islam, A, Prado, X, Llorente, A, Petit, A, Vidal, A, Català, I, Soler, T, Venturas, G, Rojo-Sebastian, A, Serra, H, Cuadras, D, Blanco, I, Lozano, J, Canals, F, Sieuwerts, AM, de Weerd, V, Look, MP, Puertas, S, García, N, Perkins, AS, Bonifaci, N, Skowron, M, Gómez-Baldó, L, Hernández, V, Martínez-Aranda, A, Martínez-Iniesta, M, Serrat, X, Cerón, J, Brunet, J, Barretina, MP, Gil, M, Falo, C, Fernández, A, Morilla, I, Pernas, S, Plà, MJ, Andreu, X, Seguí, MA, Ballester, R, Castellà, E, Nellist, M, Morales, S, Valls, J, Velasco, A, Matias-Guiu, X, Figueras, A, Sánchez-Mut, JV, Sánchez-Céspedes, M, Cordero, A, Gómez-Miragaya, J, Palomero, L, Gómez, A, Gajewski, TF, Cohen, EEW, Jesiotr, M, Bodnar, L, Quintela-Fandino, M, López-Bigas, N, Valdés-Mas, R, Puente, XS, Viñals, F, Casanovas, O, Graupera, M, Hernández-Losa, J, Ramón y Cajal, S, García-Alonso, L, Saez-Rodriguez, J, Esteller, M, Sierra, A, Martín-Martín, N, Matheu, A, Carracedo, A, González-Suárez, E, Nanjundan, M, Cortés, J, Lázaro, C, Odero, MD, Martens, JWM, Moreno-Bueno, G, Barcellos-Hoff, MH, Villanueva, A, Gomis, RR, and Pujana, MA

Subjects
Biomedical and Clinical Sciences, Oncology and Carcinogenesis, Cancer, Breast Cancer, Stem Cell Research, Adaptor Proteins, Signal Transducing, Adult, Aged, Breast Neoplasms, Carrier Proteins, Cell Proliferation, DNA-Binding Proteins, Female, Gene Expression Regulation, Neoplastic, Humans, Lung Neoplasms, MCF-7 Cells, MDS1 and EVI1 Complex Locus Protein, Microfilament Proteins, Middle Aged, Neoplasm Metastasis, Osteonectin, Proto-Oncogenes, Regulatory-Associated Protein of mTOR, SOX9 Transcription Factor, Signal Transduction, TOR Serine-Threonine Kinases, Transcription Factors, Xenograft Model Antitumor Assays, Clinical Sciences, Oncology & Carcinogenesis, Biochemistry and cell biology, Oncology and carcinogenesis
Abstract

Inhibitors of the mechanistic target of rapamycin (mTOR) are currently used to treat advanced metastatic breast cancer. However, whether an aggressive phenotype is sustained through adaptation or resistance to mTOR inhibition remains unknown. Here, complementary studies in human tumors, cancer models and cell lines reveal transcriptional reprogramming that supports metastasis in response to mTOR inhibition. This cancer feature is driven by EVI1 and SOX9. EVI1 functionally cooperates with and positively regulates SOX9, and promotes the transcriptional upregulation of key mTOR pathway components (REHB and RAPTOR) and of lung metastasis mediators (FSCN1 and SPARC). The expression of EVI1 and SOX9 is associated with stem cell-like and metastasis signatures, and their depletion impairs the metastatic potential of breast cancer cells. These results establish the mechanistic link between resistance to mTOR inhibition and cancer metastatic potential, thus enhancing our understanding of mTOR targeting failure.

Published
2017

23. Joint probability distributions for projection probabilities of random orthonormal states

Author

Alonso, L. and Gorin, T.

Subjects
Mathematical Physics, Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

A finite dimensional quantum system for which the quantum chaos conjecture applies has eigenstates, which show the same statistical properties than the column vectors of random orthogonal or unitary matrices. Here, we consider the different probabilities for obtaining a specific outcome in a projective measurement, provided the system is in one of its eigenstates. We then give analytic expressions for the joint probability density for these probabilities, with respect to the ensemble of random matrices. In the case of the unitary group, our results can be applied, also, to the phenomenon of universal conductance fluctuations, where the same mathematical quantities describe partial conductances in a two-terminal mesoscopic scattering problem with a finite number of modes in each terminal., Comment: 19 pages, 2 figures

Published
2015
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24. Filial cannibalism in the Black Stork (Ciconia nigra).

Author

Cano-Alonso, L. S., Sellis, U., Tamás, E. A., Kalocsa, B., Janic, B., Pieniak, D., Carbonell, I., Torés, A., and Zieliński, P.

Subjects
*WHITE stork, *STORKS, *CANNIBALISM, *INFANTICIDE, *SIBLINGS
Abstract

Filial and sibling cannibalism have never been documented in Black Storks (Ciconia nigra). We gathered information on 34 breeding events in 10 Black Stork nests from Estonia (three nests), Hungary (two nests), Poland (two nests) and Spain (three nests) being monitored with camera surveillance, live streaming webcams or intensive monitoring control of nests. Overall, we recorded 16 cases of filial infanticide and two cases where the nestlings died by natural causes and were later cannibalized by either their siblings or their parents. Four nestlings were killed by their parents without any attempt of cannibalism. In the remaining 12 cases of infanticide (66.7% of the total losses), 8 nestlings were consumed by one of the parents while in 4 cases the parents were not able to swallow the previously killed nestlings. All victimised nestlings were the youngest, weakest or smallest in their brood. Eight of 14 cases were identified as being associated with environmental stress or an exceptional matter during the breeding season. In at least five cases, one of the mates was new to the nest. Females committing filial infanticide swallowed or tried to swallow the chicks in five out of nine episodes where the parent's sex was known. [ABSTRACT FROM AUTHOR]

Published
2024
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28. OP37 Effect of the HLA-DQA1*05 allele on the efficacy of ustekinumab in patients with Crohn's Disease. Multicenter study based on the ENEIDA registry of GETECCU

Author

Guardiola Capón, J, primary, Iborra, M, additional, Padró, A, additional, de la Peña, L, additional, Serra, K, additional, Martin-Arranz, M D, additional, Domènech, E, additional, Fernandez, A, additional, Mesonero, F, additional, Gonzalez-Muñoza, C, additional, Ferreiro-Iglesias, R, additional, Navarro, P, additional, Martín-Cardona, A, additional, Sicilia, B, additional, Sierra-Ausin, M, additional, Calvet, X, additional, Marquez, L, additional, de Francisco, R, additional, Cañete, F, additional, Gutierrez, A, additional, García-López, S, additional, Rivero, M, additional, Hinojosa, J, additional, Iglesias-Flores, E, additional, Nos, P, additional, Riestra, S, additional, Bosca-Watts, M, additional, Zabana, Y, additional, Castro, B, additional, Barreiro, M, additional, Garcia-Planella, E, additional, Ricart, E, additional, De Francisco, R, additional, Suris, G, additional, Ruiz-Cerulla, A, additional, Rodriguez-Alonso, L, additional, Orobitg, J, additional, and Rodríguez-Moranta, F, additional

Published
2024
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29. P1211 A faecal microbial signature, in combination with faecal calprotectin, to optimise endoscopic activity monitoring in Crohn’s Disease

Author

Taboada-López, S, primary, Malagón, M, additional, Amoedo, J, additional, Ramió-Pujol, S, additional, Busquets, D, additional, Bahi, A, additional, Gilabert, P, additional, Rodríguez-Alonso, L, additional, Mañosa, M, additional, Cañete, F, additional, Torres, P F, additional, Morales, V J, additional, Delgado-Guillena, P G, additional, Domenech, E, additional, Guardiola, J, additional, Serra-Pagès, M, additional, Garcia-Gil, L J, additional, and Aldeguer, X, additional

Published
2024
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33. Singular sectors of the 1-layer Benney and dToda systems and their interrelations

Author

Konopelchenko, B., Alonso, L. Martinez, and Medina, E.

Subjects
Mathematical Physics, Nonlinear Sciences - Exactly Solvable and Integrable Systems
Abstract

Complete description of the singular sectors of the 1-layer Benney system (classical long wave equation) and dToda system is presented. Associated Euler-Poisson-Darboux equations E(1/2,1/2) and E(-1/2,-1/2) are the main tool in the analysis. A complete list of solutions of the 1-layer Benney system depending on two parameters and belonging to the singular sector is given. Relation between Euler-Poisson-Darboux equations E(a,a) with opposite sign of a is discussed., Comment: 15 pages; Theor. Mathem. Physics, 2011

Published
2011
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34. Author Correction: Proton acceleration in thermonuclear nova explosions revealed by gamma rays

Author

Acciari, V. A., Ansoldi, S., Antonelli, L. A., Engels, A. Arbet, Artero, M., Asano, K., Baack, D., Babić, A., Baquero, A., de Almeida, U. Barres, Barrio, J. A., Batković, I., González, J. Becerra, Bednarek, W., Bellizzi, L., Bernardini, E., Bernardos, M., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bökenkamp, H., Bonnoli, G., Bošnjak, Ž., Busetto, G., Carosi, R., Ceribella, G., Cerruti, M., Chai, Y., Chilingarian, A., Cikota, S., Colak, S. M., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D’Amico, G., D’Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Del Popolo, A., Delfino, M., Delgado, J., Mendez, C. Delgado, Depaoli, D., Di Pierro, F., Di Venere, L., Espiñeira, E. Do Souto, Prester, D. Dominis, Donini, A., Dorner, D., Doro, M., Elsaesser, D., Ramazani, V. Fallah, Alonso, L. Fariña, Fattorini, A., Fonseca, M. V., Font, L., Fruck, C., Fukami, S., Fukazawa, Y., López, R. J. García, Garczarczyk, M., Gasparyan, S., Gaug, M., Giglietto, N., Giordano, F., Gliwny, P., Godinović, N., Green, J. G., Green, D., Hadasch, D., Hahn, A., Hassan, T., Heckmann, L., Herrera, J., Hoang, J., Hrupec, D., Hütten, M., Inada, T., Ishio, K., Iwamura, Y., Martínez, I. Jiménez, Jormanainen, J., Jouvin, L., Kerszberg, D., Kobayashi, Y., Kubo, H., Kushida, J., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Linhoff, L., Lombardi, S., Longo, F., López-Coto, R., López-Moya, M., López-Oramas, A., Loporchio, S., de Oliveira Fraga, B. Machado, Maggio, C., Majumdar, P., Makariev, M., Mallamaci, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., Martínez, M., Aguilar, A. Mas, Mazin, D., Menchiari, S., Mender, S., Mićanović, S., Miceli, D., Miener, T., Miranda, J. M., Mirzoyan, R., Molina, E., Moralejo, A., Morcuende, D., Moreno, V., Moretti, E., Nakamori, T., Nava, L., Neustroev, V., Rosillo, M. Nievas, Nigro, C., Nilsson, K., Nishijima, K., Noda, K., Nozaki, S., Ohtani, Y., Oka, T., Otero-Santos, J., Paiano, S., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., Pavletić, L., Peñil, P., Persic, M., Pihet, M., Moroni, P. G. Prada, Prandini, E., Priyadarshi, C., Puljak, I., Rhode, W., Ribó, M., Rico, J., Righi, C., Rugliancich, A., Sahakyan, N., Saito, T., Sakurai, S., Satalecka, K., Saturni, F. G., Schleicher, B., Schmidt, K., Schweizer, T., Sitarek, J., Šnidarić, I., Sobczynska, D., Spolon, A., Stamerra, A., Strišković, J., Strom, D., Strzys, M., Suda, Y., Surić, T., Takahashi, M., Takeishi, R., Tavecchio, F., Temnikov, P., Terzić, T., Teshima, M., Tosti, L., Truzzi, S., Tutone, A., Ubach, S., van Scherpenberg, J., Vanzo, G., Acosta, M. Vazquez, Ventura, S., Verguilov, V., Vigorito, C. F., Vitale, V., Vovk, I., Will, M., Wunderlich, C., Yamamoto, T., Zarić, D., Ambrosino, F., Cecconi, M., Catanzaro, G., Ferrara, C., Frasca, A., Munari, M., Giustolisi, L., Alonso-Santiago, J., Giarrusso, M., Munari, U., and Valisa, P.

Published
2022
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35. On the singular sector of the Hermitian random matrix model in the large N limit

Author

Konopelchenko, B., Alonso, L. Martinez, and Medina, E.

Subjects
Nonlinear Sciences - Exactly Solvable and Integrable Systems, Mathematical Physics
Abstract

The singular sector of zero genus case for the Hermitian random matrix model in the large N limit is analyzed. It is proved that the singular sector of the hodograph solutions for the underlying dispersionless Toda hierarchy and the singular sector of the 1-layer Benney (classical long wave equation) hierarchy are deeply connected. This property is due to the fact that the hodograph equations for both hierarchies describe the critical points of solutions of Euler-Poisson-Darboux equations E(a,a), with a=-1/2 for the dToda hierarchy and a=1/2 for the 1-layer Benney hierarchy., Comment: 12 pages

Published
2010
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36. Hodograph solutions of the dispersionless coupled KdV hierarchies, critical points and the Euler-Poisson-Darboux equation

Author

Konopelchenko, B., Alonso, L. Martinez, and Medina, E.

Subjects
Nonlinear Sciences - Exactly Solvable and Integrable Systems
Abstract

It is shown that the hodograph solutions of the dispersionless coupled KdV (dcKdV) hierarchies describe critical and degenerate critical points of a scalar function which obeys the Euler-Poisson-Darboux equation. Singular sectors of each dcKdV hierarchy are found to be described by solutions of higher genus dcKdV hierarchies. Concrete solutions exhibiting shock type singularities are presented., Comment: 19 pages

Published
2010
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38. Multiple orthogonal polynomials, string equations and the large-n limit

Author

Alonso, L. Martinez and Medina, E.

Subjects
Nonlinear Sciences - Exactly Solvable and Integrable Systems, Mathematical Physics
Abstract

The Riemann-Hilbert problems for multiple orthogonal polynomials of types I and II are used to derive string equations associated to pairs of Lax-Orlov operators. A method for determining the quasiclassical limit of string equations in the phase space of the Whitham hierarchy of dispersionless integrable systems is provided. Applications to the analysis of the large-n limit of multiple orthogonal polynomials and their associated random matrix ensembles and models of non-intersecting Brownian motions are given., Comment: 32 pages, 3 figures; small corrections made

Published
2008

39. The double scaling limit method in the Toda hierarchy

Author

Alonso, L. Martinez and Medina, E.

Subjects
Nonlinear Sciences - Exactly Solvable and Integrable Systems
Abstract

Critical points of semiclassical expansions of solutions to the dispersionful Toda hierarchy are considered and a double scaling limit method of regularization is formulated. The analogues of the critical points characterized by the strong conditions in the Hermitian matrix model are analyzed and the property of doubling of equations is proved. A wide family of sets of critical points is introduced and the corresponding double scaling limit expansions are discussed., Comment: 20 pages

Published
2008
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40. Semiclassical expansions in the Toda hierarchy and the hermitian matrix model

Author

Alonso, L. Martinez and Medina, E.

Subjects
Nonlinear Sciences - Exactly Solvable and Integrable Systems
Abstract

An iterative algorithm for determining a class of solutions of the dispersionful 2-Toda hierarchy characterized by string equations is developed. This class includes the solution which underlies the large N-limit of the Hermitian matrix model in the one-cut case. It is also shown how the double scaling limit can be naturally formulated in this scheme, Comment: 22 pages

Published
2007
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41. A Classification of Integrable Quasiclassical Deformations of Algebraic Curves

Author

Konopelchenko, B., Alonso, L. Martinez, and Medina, E.

Subjects
Nonlinear Sciences - Exactly Solvable and Integrable Systems
Abstract

A previously introduced scheme for describing integrable deformations of of algebraic curves is completed. Lenard relations are used to characterize and classify these deformations in terms of hydrodynamic type systems. A general solution of the compatibility conditions for consistent deformations is given and expressions for the solutions of the corresponding Lenard relations are provided., Comment: 21 pages

Published
2006
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42. Integrable Quasiclassical Deformations of Cubic Curves

Author

Kodama, Y., Konopelchenko, B., Alonso, L. Martinez, and Medina, E.

Subjects
Nonlinear Sciences - Exactly Solvable and Integrable Systems
Abstract

A general scheme for determining and studying hydrodynamic type systems describing integrable deformations of algebraic curves is applied to cubic curves. Lagrange resolvents of the theory of cubic equations are used to derive and characterize these deformations., Comment: 24 pages

Published
2005
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45. Integrable Deformations of Algebraic Curves

Author

Kodama, Y., Konopelchenko, B., and Alonso, L. Martinez

Subjects
Nonlinear Sciences - Exactly Solvable and Integrable Systems
Abstract

A general scheme for determining and studying integrable deformations of algebraic curves, based on the use of Lenard relations, is presented. We emphasize the use of several types of dynamical variables : branches, power sums and potentials., Comment: 10 Pages, Proceedings Workshop-Nonlinear Physics: Theory and Experiment, Gallipoli 2004

Published
2004
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46. Integrable Quasiclassical Deformations of Algebraic Curves

Author

Konopelchenko, B. and Alonso, L. Martinez

Subjects
Nonlinear Sciences - Exactly Solvable and Integrable Systems
Abstract

A general scheme for determining and studying integrable deformations of algebraic curves is presented. The method is illustrated with the analysis of the hyperelliptic case. An associated multi-Hamiltonian hierarchy of systems of hydrodynamic type is characterized., Comment: 28 pages, no figures

Published
2004
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47. Quicksort with unreliable comparisons: a probabilistic analysis

Author

Alonso, L., Chassaing, P., Gillet, F., Janson, S., Reingold, E. M., and Schott, R.

Subjects
Mathematics - Probability, 60F05 (Primary) 68P10, 68M15 (Secondary)
Abstract

We provide a probabilistic analysis of the output of Quicksort when comparisons can err., Comment: 29 pages, 3 figures

Published
2003

48. Hydrodynamic reductions and solutions of a universal hierarchy

Author

Alonso, L. Martinez and Shabat, A. B.

Subjects
Nonlinear Sciences - Exactly Solvable and Integrable Systems
Abstract

The diagonal hydrodynamic reductions of a hierarchy of integrable hydrodynamic chains are explicitly characterized. Their compatibility with previously introduced reductions of differential type is analyzed and their associated class of hodograph solutions is discussed., Comment: 19 pages

Published
2003
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49. Towards a theory of differential constraints of a hydrodynamic hierarchy

Author

Alonso, L. Martínez and Shabat, A. B.

Subjects
Nonlinear Sciences - Exactly Solvable and Integrable Systems
Abstract

We present a theory of compatible differential constraints of a hydrodynamic hierarchy of infinite-dimensional systems. It provides a convenient point of view for studying and formulating integrability properties and it reveals some hidden structures of the theory of integrable systems. Illustrative examples and new integrable models are exhibited., Comment: Published by JNMP at http://www.sm.luth.se/math/JNMP/

Published
2003
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