Author profile: Atienza Martínez, María Nieves 

Author profile: Atienza Martínez, María Nieves

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NameAtienza Martínez, María Nieves
DepartmentMatemática Aplicada I
Knowledge areaMatemática Aplicada
Professional categoryProfesora Contratada Doctora
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Publications 

 
Final Degree Project
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Análisis topológico de las matrices de ocurrencias en la red de Bitcoin

González Díaz, Rocío; González Díaz, Rocío; Atienza Martínez, María Nieves; Atienza Martínez, María Nieves; Villalonga Álvaro, Joan; Villalonga Álvaro, Joan (2023-01-01)
Tras el nacimiento de Bitcoin, se ha producido una profunda transformación en los mercados digitales y la bolsa, dando ...
Final Degree Project
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Análisis y estudio del grafo de transacciones de Bitcoin

González Díaz, Rocío; González Díaz, Rocío; Atienza Martínez, María Nieves; Atienza Martínez, María Nieves; Claros Barrero, Fernando; Claros Barrero, Fernando (2022-01-01)
Durante los últimos años, el mundo del Bitcoin y las criptomonedas ha revolucionado por completo el concepto de pago y ...
Article
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Stable topological summaries for analyzing the organization of cells in a packed tissue

Atienza Martínez, María Nieves; Atienza Martínez, María Nieves; Jiménez Rodríguez, María José; Jiménez Rodríguez, María José; Soriano Trigueros, Manuel; Soriano Trigueros, Manuel (MDPI, 2021-01-01)
We use topological data analysis tools for studying the inner organization of cells in segmented images of epithelial ...
Article
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Persistent entropy: a scale-invariant topological statistic for analyzing cell arrangements

Atienza Martínez, María Nieves; Atienza Martínez, María Nieves; Escudero Cuadrado, Luis María; Escudero Cuadrado, Luis María; Jiménez Rodríguez, María José; Jiménez Rodríguez, María José; Soriano Trigueros, Manuel; Soriano Trigueros, Manuel (Cornell University, 2019-01-01)
In this work, we develop a method for detecting differences in the topological distribution of cells forming epithelial ...
Presentation
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Characterising epithelial tissues using persistent entropy

Atienza Martínez, María Nieves; Atienza Martínez, María Nieves; Escudero Cuadrado, Luis María; Escudero Cuadrado, Luis María; Jiménez Rodríguez, María José; Jiménez Rodríguez, María José; Soriano Trigueros, Manuel; Soriano Trigueros, Manuel (Springer, 2019-01-01)
In this paper, we apply persistent entropy, a novel topological statis- tic, for characterization of images of epithelial ...
Article
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Persistent entropy for separating topological features from noise in vietoris-rips complexes

Atienza Martínez, María Nieves; Atienza Martínez, María Nieves; González Díaz, Rocío; González Díaz, Rocío; Rucco, Matteo; Rucco, Matteo (Springer, 2019-01-01)
Persistent homology studies the evolution of k-dimensional holes along a nested sequence of simplicial complexes (called ...
Article
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On the stability of persistent entropy and new summary functions for Topological Data Analysis

Atienza Martínez, María Nieves; Atienza Martínez, María Nieves; González Díaz, Rocío; González Díaz, Rocío; Soriano Trigueros, Manuel; Soriano Trigueros, Manuel (Cornell University, 2018-01-01)
Persistent entropy of persistence barcodes, which is based on the Shannon entropy, has been recently defined and successfully ...
Article
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Balanced Islands in Two Colored Point Sets in the Plane

Aichholzer, Oswin; Aichholzer, Oswin; Atienza Martínez, María Nieves; Atienza Martínez, María Nieves; Díaz Báñez, José Miguel; Díaz Báñez, José Miguel; Fabila Monroy, Ruy; Fabila Monroy, Ruy; Flores Peñaloza, David; Flores Peñaloza, David; Pérez Lantero, Pablo; Pérez Lantero, Pablo; Vogtenhuber, Birgit; Vogtenhuber, Birgit; Urrutia, Jorge; Urrutia, Jorge (Elsevier, 2018-01-01)
Article
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A new entropy based summary function for topological data analysis

Atienza Martínez, María Nieves; Atienza Martínez, María Nieves; González Díaz, Rocío; González Díaz, Rocío; Soriano Trigueros, Manuel; Soriano Trigueros, Manuel (Elsevier, 2018-01-01)
Topological data analysis (TDA) aims to obtain useful information from data sets using topological concepts. In particular, ...
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A new topological entropy-based approach for measuring similarities among piecewise linear functions

Rucco, Matteo; Rucco, Matteo; González Díaz, Rocío; González Díaz, Rocío; Jiménez Rodríguez, María José; Jiménez Rodríguez, María José; Atienza Martínez, María Nieves; Atienza Martínez, María Nieves; Cristalli, Cristina; Cristalli, Cristina; Concettoni, Enrico; Concettoni, Enrico; Ferrante, Andrea; Ferrante, Andrea; Merelli, Emanuela; Merelli, Emanuela (Elsevier, 2017-01-01)
In this paper we present a novel methodology based on a topological entropy, the so-called persistent entropy, for addressing ...
Presentation
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Separating Topological Noise from Features Using Persistent Entropy

Atienza Martínez, María Nieves; Atienza Martínez, María Nieves; González Díaz, Rocío; González Díaz, Rocío; Rucco, Matteo; Rucco, Matteo (Springer, 2016-01-01)
Topology is the branch of mathematics that studies shapes and maps among them. From the algebraic definition of topology ...
Article
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Cover contact graphs

Atienza Martínez, María Nieves; Atienza Martínez, María Nieves; Castro Ochoa, Natalia de; Castro Ochoa, Natalia de; Cortés Parejo, María del Carmen; Cortés Parejo, María del Carmen; Garrido Vizuete, María de los Angeles; Garrido Vizuete, María de los Angeles; Grima Ruiz, Clara Isabel; Grima Ruiz, Clara Isabel; Hernández, Gregorio; Hernández, Gregorio; Márquez Pérez, Alberto; Márquez Pérez, Alberto; Moreno González, Auxiliadora; Moreno González, Auxiliadora; Nöllenburg, Martin; Nöllenburg, Martin; Portillo Fernández, José Ramón; Portillo Fernández, José Ramón; Reyes Colume, Pedro; Reyes Colume, Pedro; Valenzuela Muñoz, Jesús; Valenzuela Muñoz, Jesús; Villar Liñán, María Trinidad; Villar Liñán, María Trinidad; Wolff, Alexander; Wolff, Alexander (2012-01-01)
We study problems that arise in the context of covering certain geometric objects called seeds (e.g., points or disks) by ...
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An application of mixture distributions in modelization of length of hospital stay

Atienza Martínez, María Nieves; Atienza Martínez, María Nieves; García Heras, Joaquín; García Heras, Joaquín; Muñoz Pichardo, Juan Manuel; Muñoz Pichardo, Juan Manuel; Villa Caro, Rafael; Villa Caro, Rafael (Wiley, 2008-01-01)
Length of hospital stay (LOS) is an important indicator of the hospital activity and management of health care. The skewness ...
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On the consistency of MLE in finite mixture models of exponential families

Atienza Martínez, María Nieves; Atienza Martínez, María Nieves; García Heras, Joaquín; García Heras, Joaquín; Muñoz Pichardo, Juan Manuel; Muñoz Pichardo, Juan Manuel; Villa Caro, Rafael; Villa Caro, Rafael (Elsevier, 2007-01-01)
Finite mixtures of densities from an exponential family are frequently used in the statistical analysis of data. Modelling ...
Article
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Cover Contact Graphs

Atienza Martínez, María Nieves; Atienza Martínez, María Nieves; Castro Ochoa, Natalia de; Castro Ochoa, Natalia de; Cortés Parejo, María del Carmen; Cortés Parejo, María del Carmen; Garrido Vizuete, María de los Angeles; Garrido Vizuete, María de los Angeles; Grima Ruiz, Clara Isabel; Grima Ruiz, Clara Isabel; Hernández, Gregorio; Hernández, Gregorio; Márquez Pérez, Alberto; Márquez Pérez, Alberto; Moreno, Auxiliadora; Moreno, Auxiliadora; Nöllenburg, Martin; Nöllenburg, Martin; Portillo Fernández, José Ramón; Portillo Fernández, José Ramón; Reyes Colume, Pedro; Reyes Colume, Pedro; Valenzuela Muñoz, Jesús; Valenzuela Muñoz, Jesús; Villar Liñán, María Trinidad; Villar Liñán, María Trinidad; Wolff, Alexander; Wolff, Alexander (2007-01-01)
We study problems that arise in the context of covering certain geometric objects (so-called seeds, e.g., points or disks) ...
Presentation
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K-Factores en nubes bicromáticas

Grima Ruiz, Clara Isabel; Grima Ruiz, Clara Isabel; Atienza Martínez, María Nieves; Atienza Martínez, María Nieves; Cortés Parejo, María del Carmen; Cortés Parejo, María del Carmen; Garijo Royo, Delia; Garijo Royo, Delia; Valenzuela Muñoz, Jesús; Valenzuela Muñoz, Jesús; Villar Liñán, María Trinidad; Villar Liñán, María Trinidad (2007-01-01)
Consideramos una colección de puntos bicromática y nos preguntamos cuántos puntos adicionales son necesarios considerar ...
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A new condition for identifiability of finite mixture distributions

Atienza Martínez, María Nieves; Atienza Martínez, María Nieves; García Heras, Joaquín; García Heras, Joaquín; Muñoz Pichardo, Juan Manuel; Muñoz Pichardo, Juan Manuel (Springer, 2006-01-01)
In this paper a sufficient condition for the identifiability of finite mixtures is given. This condition is less restrictive ...
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Consistency of Maximum Likelihood Estimators in Finite Mixture Models of the Union of the Union of W-Type Families

Atienza Martínez, María Nieves; Atienza Martínez, María Nieves; García Heras, Joaquín; García Heras, Joaquín; Muñoz Pichardo, Juan Manuel; Muñoz Pichardo, Juan Manuel (Taylor and Francis, 2005-01-01)
In finite mixture models, maximum likelihood estimators have good properties, such as efficiency, consistency, and asymptotic ...
PhD Thesis
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Mixturas de distribuciones: Modelización de experiencias con asimetría en los datos

García de las Heras, Joaquín Antonio; García de las Heras, Joaquín Antonio; Muñoz Pichardo, Juan Manuel; Muñoz Pichardo, Juan Manuel; Atienza Martínez, María Nieves; Atienza Martínez, María Nieves (2003-04-24)
Una de las estrategias de la Estadística para describir y explicar una realidad compleja es la representación de la misma ...
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Liaison-psychiatry: Reasons for consultation, diagnosis, and differences between medical and surgical patients

Ruiz Doblado, S.; Ruiz Doblado, S.; Atienza Martínez, María Nieves; Atienza Martínez, María Nieves; Lacalle Remigio, Juan Ramón; Lacalle Remigio, Juan Ramón (Cambridge University Press, 1999-01-01)