Results 41 to 50 of about 3,269 (139)

Una herramienta para simular y analizar el flujo de tráfico en un cruce regulado por semáforos con tiempos de ciclos variables

Revista Cubana de Ciencias Informáticas, 2014
El objetivo de este trabajo es presentar una herramienta que ayude a establecer una buena política de cambio en los tiempos de luces de los semáforos en las horas pico, basado en los resultados experimentales que se brindan.
Orlando Fonseca Guilarte, Gabriel Santiago Pujol Fariña, Sira Allende Alonso, Gemayqzel Bouza Allende   +3 more
doaj  

Multimode Phonon Lasing via Self‐Induced Optical Coherent Pumping

Laser &Photonics Reviews, Volume 20, Issue 13, 8 July 2026.
A silicon optomechanical nanobeam generates self‐sustained phonon lasing in multiple competing mechanical modes via self‐pulsing, an intrinsic optical modulation arising from cavity nonlinearity. This self‐organized mechanism enables robust multi‐frequency operation spanning periodic, quasi‐periodic, and chaotic regimes without external modulation. The
David Alonso Tomás, Carlos Mas Arabí, Carles Milián, Néstor E. Capuj, Alejandro Martínez, Daniel Navarro Urrios   +5 more
wiley   +1 more source

Accurate Computations with Block Checkerboard Pattern Matrices

Mathematics
In this work, block checkerboard sign pattern matrices are introduced and analyzed. They satisfy the generalized Perron–Frobenius theorem. We study the case related to total positive matrices in order to guarantee bidiagonal decompositions and some ...
Jorge Delgado, Héctor Orera, J. M. Peña   +2 more
doaj   +1 more source

Numerical Approach of a Porous Thermoelastic Problem With Microtemperatures and Fading Memory

ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, Volume 106, Issue 7, July 2026.
ABSTRACT In this work, we study, from the numerical point of view, a porous thermoelastic problem with microtemperatures, where the thermal evolution is influenced by the history of both the temperature and microtemperatures. This leads to a coupled system of partial integro‐differential equations.
Noelia Bazarra, José R. Fernández, Ramón Quintanilla, María Rodríguez‐Damián   +3 more
wiley   +1 more source

Accurate Computations with Generalized Pascal k-Eliminated Functional Matrices

Mathematics
This paper presents an accurate method to obtain the bidiagonal decomposition of some generalized Pascal matrices, including Pascal k-eliminated functional matrices and Pascal symmetric functional matrices.
Jorge Delgado, Héctor Orera, Juan Manuel Peña   +2 more
doaj   +1 more source

Soil Microbial Diversity and Network Organization Respond to Land Use and Agricultural Inputs Worldwide

Global Change Biology, Volume 32, Issue 7, July 2026.
Based on a global analysis of 1921 soil samples, we show that agricultural management acts as a powerful ecological filter reshaping microbial communities. Land use and inputs—pesticides and fertilizers—drive a functional shift toward opportunistic pathogens and fragmented, less connected microbial networks, potentially compromising soil ecosystem ...
Zaki Saati‐Santamaría, Sergio Pérez‐Gorjón, Daniel Abel‐Schaad, Alberto Acedo‐Bécares, Francisca Alba‐Sánchez, Amanda Lucia Alves, Weronika Babinska‐Wensierska, Jorge Ariel Marfetán, Carolina Barroetaveña, Kara Barry, Francisco Beitia, Katerina Biniari, Elí Misael Bobadilla‐Peñaló, Gregory Bonito, Mihalis Boutaris, Victoria Bueno‐González, Guillermo Cabezas, Parharidis Charalambos, Ovidiu Copoț, Andrés de Errasti, Luis de Pedro Noriega, Philippe Delavault, Fernando Dianez‐Martínez, David Diez‐Méndez, Enrico Ercole, Abel Fernández‐Ruiz, Martina Ferraguti, Ana Laura Gallo, Paula García‐Fraile, Mario Garrido, David González del Pozo, Alina G. Greslebin, Gabriel Grilli, Edmundo Danilo Guilcapi‐Pacheco, Danny Haelewaters, Terry W. Henkel, Andrés Hirigoyen, Kentaro Hosaka, Pablo Yair Huais, Marja Jalli, Alfredo Justo, Marjo Keskitalo, Tommaso La Mantia, Aneta Lambevska, Ewald Langer, Corina Leconte, Ewa Lojkowska, David Marcos‐Vidal, Antonio J. Mendoza‐Fernández, Isabel Miralles‐Mellado, Lucía Molina, Norman Muzhinji, Minh N. Nguyen, Diego Nieto‐Lugilde, Alberto Nieto‐Palenzuela, André‐Ledoux Njouonkou, Sarah Norvell, Francisco J. Oficialdegui, Raúl Ortega Pérez, Ansa Palojärvi, Marcos Paradelo‐Pérez, Zunilda Pavone, Julio Peñas de Giles, Anna Maria Persiani, María Belén Pildain, Daniel Pinto‐Carrasco, Lucie Poulin, Jean‐Bernard Pouvreau, Paola Quatrini, David Rodríguez de la Cruz, Gonzalo M. Romano, Natalia Rosas‐Ramos, Francisca Ruano, Isabel Salcedo‐Larralde, Esteban Salmerón‐Sánchez, Katerina Sam, Cathy Sharp, Patricia Vieira Tiago, Ricardo Valenzuela, Aída M. Vasco‐Palacios, Mylonas Vasilis, María Laura Vélez, Alfredo Vizzini, Sergey Volobuev, Alan R. Wood, Pirjo Yli‐Hemminki, Nourou S. Yorou, Ivan V. Zmitrovich, Javier Bobo‐Pinilla   +88 more
wiley   +1 more source

Inverse problems of polynomial and rational matrices involving the eigenstructure and data of the column and row spaces

Journal of the London Mathematical Society, Volume 114, Issue 1, July 2026.
Abstract The eigenstructure of a rational matrix is comprised by its invariant rational functions, both finite and at infinity, and by the minimal indices of its left and right null spaces. These quantities arise in many applications and have been thoroughly studied in numerous references.
Itziar Baragaña, Froilán M. Dopico, Silvia Marcaida, Alicia Roca   +3 more
wiley   +1 more source

Assessing Cost Efficiency Thresholds in Fragmented Agriculture: A Gamma-Based Model of the Trade-Off Between Unit and Total Parcel Costs

AppliedMath
Parcel size strongly influences agricultural production costs, and combining spatial and economic information within a mathematical setting helps to clarify this relationship.
Elena Sánchez Arnau, Antonia Ferrer Sapena, Maria Carmen Cárcel-Mas, Claudia Sánchez Arnau, Enrique A. Sánchez Pérez   +4 more
doaj   +1 more source

Coupled Versus Uncoupled Blow-Up Rates in Cooperative n-Species Logistic Systems

Advanced Nonlinear Studies, 2017
This paper ascertains the exact boundary blow-up rates of the large positive solutions of a class of cooperative logistic systems involving n species in a general domain of ℝN{\mathbb{R}^{N}} of class 𝒞2+ν{\mathcal{C}^{2+\nu ...
López-Gómez Julián, Maire Luis
doaj   +1 more source

An Exact Method for Reliable Shortest Path Problems With Correlation

Networks, Volume 87, Issue 4, Page 372-389, June 2026.
ABSTRACT Shortest path problems often arise in contexts where travel times are uncertain. In these settings, reliable paths are often valued more than paths with lower expected travel times. This has led to several variants of reliable shortest path problems (RSPP) that handle travel time reliability differently. We propose an algorithmic framework for
Esteban Leiva, Santiago Morales, Daniel Yamín, Andrés L. Medaglia   +3 more
wiley   +1 more source