Results 21 to 30 of about 7,962 (107)

Revistas periféricas de generación interna en la Universidad Autónoma de Chihuahua, México: identificación de indicadores para la calidad [PDF]

, 2012
This paper represents the results of an investigation into seven serials edited by the Autonomous University of Chihuahua (Mexico), which constitute its full catalog, for which we proceeded to develop a bibliometric analysis to identify the main ...
Ruiz-Domínguez, Arturo, Tarango, Javier
core   +2 more sources

Quantum Cosmology of Quadratic f(R) Theories with a FRW Metric

Advances in Mathematical Physics, Volume 2017, Issue 1, 2017., 2017
We study the quantum cosmology of a quadratic f(R) theory with a FRW metric, via one of its equivalent Horndeski type actions, where the dynamic of the scalar field is induced. The classical equations of motion and the Wheeler‐DeWitt equation, in their exact versions, are solved numerically.
V. Vázquez-Báez, C. Ramírez, Anzhong Wang   +2 more
wiley   +1 more source

A GRASP‐Tabu Heuristic Approach to Territory Design for Pickup and Delivery Operations for Large‐Scale Instances

Mathematical Problems in Engineering, Volume 2017, Issue 1, 2017., 2017
We address a logistics districting problem faced by a parcel company whose operations consist of picking up and delivering packages over a service region. The districting process aims to find a partition of the service region into delivery and collection zones that may be served by a single vehicle that departs from a central depot.
Rosa G. González-Ramírez, Neale R. Smith, Ronald G. Askin, José-Fernando Camacho-Vallejo, Jose Luis González-Velarde, Federica Caselli   +5 more
wiley   +1 more source

Algebraic and toroidal representation of the genetic code

Frontiers in Applied Mathematics and Statistics
The genetic code is a set of regulatory principles that control the translation of information encoded in messenger RNA (mRNA) into a sequence of amino acids.
Rodrigo Rodríguez-Gutiérrez, Francisco Hernandez-Cabrera, Francisco Javier Almaguer-Martínez, José De Jesús Bernal-Alvarado   +3 more
doaj   +1 more source

Tracking Control for Mobile Robots Considering the Dynamics of All Their Subsystems: Experimental Implementation

Complexity, Volume 2017, Issue 1, 2017., 2017
The trajectory tracking task in a wheeled mobile robot (WMR) is solved by proposing a three‐level hierarchical controller that considers the mathematical model of the mechanical structure (differential drive WMR), actuators (DC motors), and power stage (DC/DC Buck power converters).
José Rafael García-Sánchez, Ramón Silva-Ortigoza, Salvador Tavera-Mosqueda, Celso Márquez-Sánchez, Victor Manuel Hernández-Guzmán, Mayra Antonio-Cruz, Gilberto Silva-Ortigoza, Hind Taud, Jinde Cao   +8 more
wiley   +1 more source

Noncontact Optical Fiber Sensor for Measuring the Refractive Index of Liquids

Journal of Sensors, Volume 2016, Issue 1, 2016., 2016
A noncontact optical fiber sensor for measuring the refractive index of transparent liquids is proposed. It operates by calculating the path of a focused laser beam at 635 nm that travels across the boundaries of a liquid sample. The optical power Fresnel reflections are detected and, subsequently, the refractive index is determined as the ratio ...
R. Selvas-Aguilar, A. Castillo-Guzman, L. Cortez-Gonzalez, D. Toral-Acosta, A. Martinez-Rios, G. Anzueto-Sanchez, V. M. Duran-Ramirez, S. Arroyo-Rivera, Xingwei Wang   +8 more
wiley   +1 more source

The Mother's Day Geomagnetic Storm on 10 May 2024: Aurora Observations and Low Latitude Space Weather Effects in Mexico

Space Weather, Volume 22, Issue 11, November 2024.
Abstract On 10 May 2024, a severe geomagnetic storm coinciding with Mother's Day in Mexico lasted over 40 hr and produced polar auroras observable at low latitudes. This storm, the most intense since 2003, resulted from a series of solar flares and coronal mass ejections from active region 3664.
J. A. Gonzalez‐Esparza, E. Sanchez‐Garcia, M. Sergeeva, P. Corona‐Romero, L. X. Gonzalez‐Mendez, J. F. Valdes‐Galicia, E. Aguilar‐Rodriguez, M. Rodriguez‐Martinez, C. Ramirez‐Pacheco, C. I. Castellanos, M. Pazos, B. Mendoza, V. J. Gatica‐Acevedo, A. Melgarejo‐Morales, R. Caraballo, E. Andrade‐Mascote, P. Villanueva‐Hernandez, R. Bonifaz‐Alfonzo, P. Sierra, E. Romero‐Hernandez, I. Peralta‐Mendoza, E. Perez‐Tijerina, J. C. Mejia‐Ambriz, C. Guerrero‐Peña, A. Caccavari, G. Cifuentes‐Nava, E. Hernandez‐Quintero   +26 more
wiley   +1 more source

Bilevel Programming and Applications

Mathematical Problems in Engineering, Volume 2015, Issue 1, 2015., 2015
A great amount of new applied problems in the area of energy networks has recently arisen that can be efficiently solved only as mixed‐integer bilevel programs. Among them are the natural gas cash‐out problem, the deregulated electricity market equilibrium problem, biofuel problems, a problem of designing coupled energy carrier networks, and so forth ...
Vyacheslav V. Kalashnikov, Stephan Dempe, Gerardo A. Pérez-Valdés, Nataliya I. Kalashnykova, José-Fernando Camacho-Vallejo, Sergii V. Kavun   +5 more
wiley   +1 more source

La evolución de los conceptos de espacio y tiempo [PDF]

, 2004
Newton desarrolló la ciencia de la mecánica bajo la hipótesis de que el tiempo y el espacio son absolutos. A principios del siglo XX Einstein desarrolló la teoría de la relatividad en la que el espacio y el tiempo ya no son absolutos, sino que están ...
Morones Ibarra, José Rubén
core  

Earthquakes Trigger Rapid Flash Boiling Front at Optimal Geologic Conditions

Geophysical Research Letters, Volume 51, Issue 16, 28 August 2024.
Abstract The interplay between seismic activity and fluid flow is essential during the evolution of hydrothermal systems. Although earthquakes can trigger transient fluid flow and phase changes in dilational jogs, the temporal scale and the geologic conditions that enhance such process are poorly quantified.
P. Sanchez‐Alfaro, I. Wallis, P. Iturrieta, J. Rowland, D. Dempsey, J. O’Sullivan, M. Reich, J. Cembrano   +7 more
wiley   +1 more source